--- _id: '15414' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Integrating Management Science into the HPC Research Ecosystem. Communications of the ACM. 2020;63(9):35-37. apa: Schryen, G. (2020). Integrating Management Science into the HPC Research Ecosystem. Communications of the ACM, 63(9), 35–37. bibtex: '@article{Schryen_2020, title={Integrating Management Science into the HPC Research Ecosystem}, volume={63}, number={9}, journal={Communications of the ACM}, author={Schryen, Guido}, year={2020}, pages={35–37} }' chicago: 'Schryen, Guido. “Integrating Management Science into the HPC Research Ecosystem.” Communications of the ACM 63, no. 9 (2020): 35–37.' ieee: G. Schryen, “Integrating Management Science into the HPC Research Ecosystem,” Communications of the ACM, vol. 63, no. 9, pp. 35–37, 2020. mla: Schryen, Guido. “Integrating Management Science into the HPC Research Ecosystem.” Communications of the ACM, vol. 63, no. 9, 2020, pp. 35–37. short: G. Schryen, Communications of the ACM 63 (2020) 35–37. date_created: 2019-12-28T14:27:44Z date_updated: 2022-01-06T06:52:25Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2019-12-28T14:30:03Z date_updated: 2020-03-05T10:36:48Z file_id: '15415' file_name: Bringing HPC to management science - Web version.pdf file_size: 186658 relation: main_file file_date_updated: 2020-03-05T10:36:48Z has_accepted_license: '1' intvolume: ' 63' issue: '9' language: - iso: eng oa: '1' page: 35 - 37 publication: Communications of the ACM status: public title: Integrating Management Science into the HPC Research Ecosystem type: journal_article user_id: '61579' volume: 63 year: '2020' ... --- _id: '15513' abstract: - lang: eng text: This interview is part of the special issue (01/2020) on “High Performance Business Computing” to be published in the journal Business & Information Systems Engineering. The interviewee Utz-Uwe Haus is Senior Research Engineer @ CRAY European Research Lab (CERL)). A bio of him is included at the end of the interview. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Natalia full_name: Kliewer, Natalia last_name: Kliewer - first_name: Andreas full_name: Fink, Andreas last_name: Fink citation: ama: 'Schryen G, Kliewer N, Fink A. Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges". Business & Information Systems Engineering. 2020;62(01/2020):21-23.' apa: 'Schryen, G., Kliewer, N., & Fink, A. (2020). Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges". Business & Information Systems Engineering, 62(01/2020), 21–23.' bibtex: '@article{Schryen_Kliewer_Fink_2020, title={Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges"}, volume={62}, number={01/2020}, journal={Business & Information Systems Engineering}, author={Schryen, Guido and Kliewer, Natalia and Fink, Andreas}, year={2020}, pages={21–23} }' chicago: 'Schryen, Guido, Natalia Kliewer, and Andreas Fink. “Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges".” Business & Information Systems Engineering 62, no. 01/2020 (2020): 21–23.' ieee: 'G. Schryen, N. Kliewer, and A. Fink, “Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges",” Business & Information Systems Engineering, vol. 62, no. 01/2020, pp. 21–23, 2020.' mla: 'Schryen, Guido, et al. “Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges".” Business & Information Systems Engineering, vol. 62, no. 01/2020, 2020, pp. 21–23.' short: G. Schryen, N. Kliewer, A. Fink, Business & Information Systems Engineering 62 (2020) 21–23. date_created: 2020-01-13T13:23:51Z date_updated: 2022-01-06T06:52:28Z ddc: - '000' department: - _id: '277' file: - access_level: closed content_type: application/pdf creator: hsiemes date_created: 2020-01-13T13:22:27Z date_updated: 2021-08-12T11:41:55Z file_id: '15516' file_name: Interview Utz-Uwe Haus (Cray) - BISE SI HPBC - Prepublication version.pdf file_size: 82469 relation: main_file - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2021-08-12T11:41:21Z date_updated: 2021-08-12T11:41:21Z file_id: '23386' file_name: Schryen2020_Article_InterviewWithUtz-UweHausOnHigh.pdf file_size: 226595 relation: main_file file_date_updated: 2021-08-12T11:41:55Z has_accepted_license: '1' intvolume: ' 62' issue: 01/2020 language: - iso: eng oa: '1' page: 21 - 23 publication: Business & Information Systems Engineering status: public title: 'Interview with Utz-Uwe Haus on “High Performance Computing in Economic Environments: Opportunities and Challenges"' type: journal_article user_id: '61579' volume: 62 year: '2020' ... --- _id: '15022' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Parallel computational optimization in operations research: A new integrative framework, literature review and research directions. European Journal of Operational Research. 2020;287(1):1-18.' apa: 'Schryen, G. (2020). Parallel computational optimization in operations research: A new integrative framework, literature review and research directions. European Journal of Operational Research, 287(1), 1–18.' bibtex: '@article{Schryen_2020, title={Parallel computational optimization in operations research: A new integrative framework, literature review and research directions}, volume={287}, number={1}, journal={European Journal of Operational Research}, publisher={Elsevier}, author={Schryen, Guido}, year={2020}, pages={1–18} }' chicago: 'Schryen, Guido. “Parallel Computational Optimization in Operations Research: A New Integrative Framework, Literature Review and Research Directions.” European Journal of Operational Research 287, no. 1 (2020): 1–18.' ieee: 'G. Schryen, “Parallel computational optimization in operations research: A new integrative framework, literature review and research directions,” European Journal of Operational Research, vol. 287, no. 1, pp. 1–18, 2020.' mla: 'Schryen, Guido. “Parallel Computational Optimization in Operations Research: A New Integrative Framework, Literature Review and Research Directions.” European Journal of Operational Research, vol. 287, no. 1, Elsevier, 2020, pp. 1–18.' short: G. Schryen, European Journal of Operational Research 287 (2020) 1–18. date_created: 2019-11-18T11:11:00Z date_updated: 2022-01-06T06:52:15Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2019-11-18T11:11:56Z date_updated: 2020-03-05T10:37:02Z file_id: '15023' file_name: LR - OR and parallelization.pdf file_size: 832170 relation: main_file file_date_updated: 2020-03-05T10:37:02Z has_accepted_license: '1' intvolume: ' 287' issue: '1' language: - iso: eng oa: '1' page: 1 - 18 publication: European Journal of Operational Research publisher: Elsevier status: public title: 'Parallel computational optimization in operations research: A new integrative framework, literature review and research directions' type: journal_article user_id: '61579' volume: 287 year: '2020' ... --- _id: '16249' abstract: - lang: eng text: Timing plays a crucial role in the context of information security investments. We regard timing in two dimensions, namely the time of announcement in relation to the time of investment and the time of announcement in relation to the time of a fundamental security incident. The financial value of information security investments is assessed by examining the relationship between the investment announcements and their stock market reaction focusing on the two time dimensions. Using an event study methodology, we found that both dimensions influence the stock market return of the investing organization. Our results indicate that (1) after fundamental security incidents in a given industry, the stock price will react more positively to a firm’s announcement of actual information security investments than to announcements of the intention to invest; (2) the stock price will react more positively to a firm’s announcements of the intention to invest after the fundamental security incident compared to before; and (3) the stock price will react more positively to a firm’s announcements of actual information security investments after the fundamental security incident compared to before. Overall, the lowest abnormal return can be expected when the intention to invest is announced before a fundamental information security incident and the highest return when actual investing after a fundamental information security incident in the respective industry. author: - first_name: Eva full_name: Szubartowicz, Eva last_name: Szubartowicz - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Szubartowicz E, Schryen G. Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements. Journal of Information System Security. 2020;16(1):3-31.' apa: 'Szubartowicz, E., & Schryen, G. (2020). Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements. Journal of Information System Security, 16(1), 3–31.' bibtex: '@article{Szubartowicz_Schryen_2020, title={Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements}, volume={16}, number={1}, journal={Journal of Information System Security}, publisher={Information Institute Publishing, Washington DC, USA}, author={Szubartowicz, Eva and Schryen, Guido}, year={2020}, pages={3–31} }' chicago: 'Szubartowicz, Eva, and Guido Schryen. “Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements.” Journal of Information System Security 16, no. 1 (2020): 3–31.' ieee: 'E. Szubartowicz and G. Schryen, “Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements,” Journal of Information System Security, vol. 16, no. 1, pp. 3–31, 2020.' mla: 'Szubartowicz, Eva, and Guido Schryen. “Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements.” Journal of Information System Security, vol. 16, no. 1, Information Institute Publishing, Washington DC, USA, 2020, pp. 3–31.' short: E. Szubartowicz, G. Schryen, Journal of Information System Security 16 (2020) 3–31. date_created: 2020-03-05T10:29:00Z date_updated: 2022-01-06T06:52:47Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2020-03-05T10:26:11Z date_updated: 2020-03-05T10:35:49Z file_id: '16250' file_name: Timing in Information Security - JISSEC format PREPUBLICATION.pdf file_size: 478056 relation: main_file file_date_updated: 2020-03-05T10:35:49Z has_accepted_license: '1' intvolume: ' 16' issue: '1' keyword: - Event Study - Information Security - Investment Announcements - Stock Price Reaction - Value of Information Security Investments language: - iso: eng oa: '1' page: 3 - 31 publication: Journal of Information System Security publisher: Information Institute Publishing, Washington DC, USA status: public title: 'Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements' type: journal_article user_id: '61579' volume: 16 year: '2020' ... --- _id: '11946' abstract: - lang: eng text: "Literature reviews (LRs) play an important role in the development of domain knowledge in all fields. Yet, we observe a\r\nlack of insights into the activities with which LRs actually develop knowledge. To address this important gap, we (1)\r\nderive knowledge building activities from the extant literature on LRs, (2) suggest a knowledge-based typology of LRs\r\nthat complements existing typologies, and (3) apply the suggested typology in an empirical study that explores how LRs\r\nwith different goals and methodologies have contributed to knowledge development. The analysis of 240 LRs published\r\nin 40 renowned IS journals between 2000 and 2014 allows us to draw a detailed picture of knowledge development\r\nachieved by one of the most important genres in the IS field. An overarching contribution of our work is to unify extant\r\nconceptualizations of LRs by clarifying and illustrating how LRs apply different methodologies in a range of knowledge\r\nbuilding activities to achieve their goals with respect to theory." author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian - first_name: Guy full_name: Paré, Guy last_name: Paré citation: ama: 'Schryen G, Wagner G, Benlian A, Paré G. A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field. Communications of the AIS. 2020;46:134-186. doi:10.17705/1CAIS.04607' apa: 'Schryen, G., Wagner, G., Benlian, A., & Paré, G. (2020). A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field. Communications of the AIS, 46, 134–186. https://doi.org/10.17705/1CAIS.04607' bibtex: '@article{Schryen_Wagner_Benlian_Paré_2020, title={A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field}, volume={46}, DOI={10.17705/1CAIS.04607}, journal={Communications of the AIS}, author={Schryen, Guido and Wagner, Gerit and Benlian, Alexander and Paré, Guy}, year={2020}, pages={134–186} }' chicago: 'Schryen, Guido, Gerit Wagner, Alexander Benlian, and Guy Paré. “A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field.” Communications of the AIS 46 (2020): 134–86. https://doi.org/10.17705/1CAIS.04607.' ieee: 'G. Schryen, G. Wagner, A. Benlian, and G. Paré, “A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field,” Communications of the AIS, vol. 46, pp. 134–186, 2020, doi: 10.17705/1CAIS.04607.' mla: 'Schryen, Guido, et al. “A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field.” Communications of the AIS, vol. 46, 2020, pp. 134–86, doi:10.17705/1CAIS.04607.' short: G. Schryen, G. Wagner, A. Benlian, G. Paré, Communications of the AIS 46 (2020) 134–186. date_created: 2019-07-12T12:01:02Z date_updated: 2022-06-10T06:38:58Z ddc: - '000' department: - _id: '277' doi: 10.17705/1CAIS.04607 file: - access_level: open_access content_type: application/pdf creator: schryen date_created: 2020-02-26T18:12:29Z date_updated: 2020-03-05T10:36:15Z file_id: '16115' file_name: RA-18-198.pdf file_size: 1146830 relation: main_file file_date_updated: 2020-03-05T10:36:15Z has_accepted_license: '1' intvolume: ' 46' keyword: - Literature review - knowledge development - knowledge building activities - knowledge-based typology - information systems research language: - iso: eng oa: '1' page: 134-186 publication: Communications of the AIS publication_identifier: issn: - ' 1529-3181' status: public title: 'A Knowledge Development Perspective on Literature Reviews: Validation of a New Typology in the IS Field' type: journal_article user_id: '72850' volume: 46 year: '2020' ... --- _id: '14985' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Natalia full_name: Kliewer, Natalia last_name: Kliewer - first_name: Andreas full_name: Fink, Andreas last_name: Fink citation: ama: Schryen G, Kliewer N, Fink A. High Performance Business Computing. Business & Information Systems Engineering. 2020;62(1):1-3. doi:10.1007/s12599-019-00622-2 apa: Schryen, G., Kliewer, N., & Fink, A. (2020). High Performance Business Computing. Business & Information Systems Engineering, 62(1), 1–3. https://doi.org/10.1007/s12599-019-00622-2 bibtex: '@article{Schryen_Kliewer_Fink_2020, title={High Performance Business Computing}, volume={62}, DOI={10.1007/s12599-019-00622-2}, number={1}, journal={Business & Information Systems Engineering}, author={Schryen, Guido and Kliewer, Natalia and Fink, Andreas}, year={2020}, pages={1–3} }' chicago: 'Schryen, Guido, Natalia Kliewer, and Andreas Fink. “High Performance Business Computing.” Business & Information Systems Engineering 62, no. 1 (2020): 1–3. https://doi.org/10.1007/s12599-019-00622-2.' ieee: 'G. Schryen, N. Kliewer, and A. Fink, “High Performance Business Computing,” Business & Information Systems Engineering, vol. 62, no. 1, pp. 1–3, 2020, doi: 10.1007/s12599-019-00622-2.' mla: Schryen, Guido, et al. “High Performance Business Computing.” Business & Information Systems Engineering, vol. 62, no. 1, 2020, pp. 1–3, doi:10.1007/s12599-019-00622-2. short: G. Schryen, N. Kliewer, A. Fink, Business & Information Systems Engineering 62 (2020) 1–3. date_created: 2019-11-14T10:49:39Z date_updated: 2022-06-10T06:15:40Z ddc: - '000' department: - _id: '277' doi: 10.1007/s12599-019-00622-2 file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2019-11-14T10:52:41Z date_updated: 2020-03-05T10:37:36Z file_id: '14986' file_name: Schryen2019_Article_HighPerformanceBusinessComputi.pdf file_size: 161538 relation: main_file file_date_updated: 2020-03-05T10:37:36Z has_accepted_license: '1' intvolume: ' 62' issue: '1' language: - iso: eng oa: '1' page: 1-3 publication: Business & Information Systems Engineering status: public title: High Performance Business Computing type: journal_article user_id: '72850' volume: 62 year: '2020' ... --- _id: '13175' abstract: - lang: eng text: "Today, organizations must deal with a plethora of IT security threats and to ensure smooth and\r\nuninterrupted business operations, firms are challenged to predict the volume of IT security vulnerabilities\r\nand allocate resources for fixing them. This challenge requires decision makers to assess\r\nwhich system or software packages are prone to vulnerabilities, how many post-release vulnerabilities\r\ncan be expected to occur during a certain period of time, and what impact exploits might have.\r\nSubstantial research has been dedicated to techniques that analyze source code and detect security\r\nvulnerabilities. However, only limited research has focused on forecasting security vulnerabilities\r\nthat are detected and reported after the release of software. To address this shortcoming, we apply\r\nestablished methodologies which are capable of forecasting events exhibiting specific time series\r\ncharacteristics of security vulnerabilities, i.e., rareness of occurrence, volatility, non-stationarity,\r\nand seasonality. Based on a dataset taken from the National Vulnerability Database (NVD), we use\r\nthe Mean Absolute Error (MAE) and Root Mean Square Error (RMSE) to measure the forecasting\r\naccuracy of single, double, and triple exponential smoothing methodologies, Croston's methodology,\r\nARIMA, and a neural network-based approach. We analyze the impact of the applied forecasting\r\nmethodology on the prediction accuracy with regard to its robustness along the dimensions of the\r\nexamined system and software package \"operating systems\", \"browsers\" and \"office solutions\" and\r\nthe applied metrics. To the best of our knowledge, this study is the first to analyze the effect\r\nof forecasting methodologies and to apply metrics that are suitable in this context. Our results\r\nshow that the optimal forecasting methodology depends on the software or system package, as some\r\nmethodologies perform poorly in the context of IT security vulnerabilities, that absolute metrics\r\ncan cover the actual prediction error precisely, and that the prediction accuracy is robust within the\r\ntwo applied forecasting-error metrics." article_type: original author: - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Yasasin E, Prester J, Wagner G, Schryen G. Forecasting IT Security Vulnerabilities - An Empirical Analysis. Computers & Security. 2020;88(January). apa: Yasasin, E., Prester, J., Wagner, G., & Schryen, G. (2020). Forecasting IT Security Vulnerabilities - An Empirical Analysis. Computers & Security, 88(January). bibtex: '@article{Yasasin_Prester_Wagner_Schryen_2020, title={Forecasting IT Security Vulnerabilities - An Empirical Analysis}, volume={88}, number={January}, journal={Computers & Security}, author={Yasasin, Emrah and Prester, Julian and Wagner, Gerit and Schryen, Guido}, year={2020} }' chicago: Yasasin, Emrah, Julian Prester, Gerit Wagner, and Guido Schryen. “Forecasting IT Security Vulnerabilities - An Empirical Analysis.” Computers & Security 88, no. January (2020). ieee: E. Yasasin, J. Prester, G. Wagner, and G. Schryen, “Forecasting IT Security Vulnerabilities - An Empirical Analysis,” Computers & Security, vol. 88, no. January, 2020. mla: Yasasin, Emrah, et al. “Forecasting IT Security Vulnerabilities - An Empirical Analysis.” Computers & Security, vol. 88, no. January, 2020. short: E. Yasasin, J. Prester, G. Wagner, G. Schryen, Computers & Security 88 (2020). date_created: 2019-09-09T18:24:45Z date_updated: 2022-10-19T15:27:51Z ddc: - '000' department: - _id: '195' - _id: '277' file: - access_level: open_access content_type: application/pdf creator: schryen date_created: 2019-09-09T18:24:35Z date_updated: 2019-09-09T18:24:35Z file_id: '13176' file_name: Forecasting_IT_Security_Vulnerabilities.pdf file_size: 894663 relation: main_file file_date_updated: 2019-09-09T18:24:35Z has_accepted_license: '1' intvolume: ' 88' issue: January language: - iso: eng oa: '1' publication: Computers & Security publication_identifier: issn: - 0167-4048 publication_status: published status: public title: Forecasting IT Security Vulnerabilities - An Empirical Analysis type: journal_article user_id: '72850' volume: 88 year: '2020' ... --- _id: '5674' abstract: - lang: eng text: In disaster operations management, a challenging task for rescue organizations occurs when they have to assign and schedule their rescue units to emerging incidents under time pressure in order to reduce the overall resulting harm. Of particular importance in practical scenarios is the need to consider collaboration of rescue units. This task has hardly been addressed in the literature. We contribute to both modeling and solving this problem by (1) conceptualizing the situation as a type of scheduling problem, (2) modeling it as a binary linear minimization problem, (3) suggesting a branch-and-price algorithm, which can serve as both an exact and heuristic solution procedure, and (4) conducting computational experiments - including a sensitivity analysis of the effects of exogenous model parameters on execution times and objective value improvements over a heuristic suggested in the literature - for different practical disaster scenarios. The results of our computational experiments show that most problem instances of practically feasible size can be solved to optimality within ten minutes. Furthermore, even when our algorithm is terminated once the first feasible solution has been found, this solution is in almost all cases competitive to the optimal solution and substantially better than the solution obtained by the best known algorithm from the literature. This performance of our branch-and-price algorithm enables rescue organizations to apply our procedure in practice, even when the time for decision making is limited to a few minutes. By addressing a very general type of scheduling problem, our approach applies to various scheduling situations. author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Rauchecker G, Schryen G. An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response. European Journal of Operational Research. 2019;272(1):352-363. apa: Rauchecker, G., & Schryen, G. (2019). An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response. European Journal of Operational Research, 272(1), 352–363. bibtex: '@article{Rauchecker_Schryen_2019, title={An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response}, volume={272}, number={1}, journal={European Journal of Operational Research}, publisher={Elsevier}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2019}, pages={352–363} }' chicago: 'Rauchecker, Gerhard, and Guido Schryen. “An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response.” European Journal of Operational Research 272, no. 1 (2019): 352–63.' ieee: G. Rauchecker and G. Schryen, “An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response,” European Journal of Operational Research, vol. 272, no. 1, pp. 352–363, 2019. mla: Rauchecker, Gerhard, and Guido Schryen. “An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response.” European Journal of Operational Research, vol. 272, no. 1, Elsevier, 2019, pp. 352–63. short: G. Rauchecker, G. Schryen, European Journal of Operational Research 272 (2019) 352–363. date_created: 2018-11-14T15:35:27Z date_updated: 2022-01-06T07:02:28Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:13:12Z date_updated: 2018-12-13T15:16:37Z file_id: '6019' file_name: JOURNAL VERSION.pdf file_size: 1470310 relation: main_file file_date_updated: 2018-12-13T15:16:37Z has_accepted_license: '1' intvolume: ' 272' issue: '1' keyword: - OR in disaster relief - disaster operations management - scheduling - branch-and-price language: - iso: eng oa: '1' page: 352 - 363 publication: European Journal of Operational Research publisher: Elsevier status: public title: An Exact Branch-and-Price Algorithm for Scheduling Rescue Units during Disaster Response type: journal_article user_id: '61579' volume: 272 year: '2019' ... --- _id: '6512' abstract: - lang: eng text: Scheduling problems are essential for decision making in many academic disciplines, including operations management, computer science, and information systems. Since many scheduling problems are NP-hard in the strong sense, there is only limited research on exact algorithms and how their efficiency scales when implemented on parallel computing architectures. We address this gap by (1) adapting an exact branch-and-price algorithm to a parallel machine scheduling problem on unrelated machines with sequence- and machine-dependent setup times, (2) parallelizing the adapted algorithm by implementing a distributed-memory parallelization with a master/worker approach, and (3) conducting extensive computational experiments using up to 960 MPI processes on a modern high performance computing cluster. With our experiments, we show that the efficiency of our parallelization approach can lead to superlinear speedup but can vary substantially between instances. We further show that the wall time of serial execution can be substantially reduced through our parallelization, in some cases from 94 hours to less than six minutes when our algorithm is executed on 960 processes. author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Rauchecker G, Schryen G. Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm. Computers & Operations Research. 2019;(104):338-357.' apa: 'Rauchecker, G., & Schryen, G. (2019). Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm. Computers & Operations Research, (104), 338–357.' bibtex: '@article{Rauchecker_Schryen_2019, title={Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm}, number={104}, journal={Computers & Operations Research}, publisher={Elsevier}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2019}, pages={338–357} }' chicago: 'Rauchecker, Gerhard, and Guido Schryen. “Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm.” Computers & Operations Research, no. 104 (2019): 338–57.' ieee: 'G. Rauchecker and G. Schryen, “Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm,” Computers & Operations Research, no. 104, pp. 338–357, 2019.' mla: 'Rauchecker, Gerhard, and Guido Schryen. “Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm.” Computers & Operations Research, no. 104, Elsevier, 2019, pp. 338–57.' short: G. Rauchecker, G. Schryen, Computers & Operations Research (2019) 338–357. date_created: 2019-01-08T13:50:44Z date_updated: 2022-01-06T07:03:08Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2019-01-08T14:03:53Z date_updated: 2019-01-08T14:03:53Z file_id: '6513' file_name: cor-parallel-bp-for-upmsp.pdf file_size: 4153528 relation: main_file file_date_updated: 2019-01-08T14:03:53Z has_accepted_license: '1' issue: '104' keyword: - parallel machine scheduling with setup times - parallel branch-and-price algorithm - high performance computing - master/worker parallelization language: - iso: eng oa: '1' page: 338-357 publication: Computers & Operations Research publisher: Elsevier status: public title: 'Using High Performance Computing for Unrelated Parallel Machine Scheduling with Sequence-Dependent Setup Times: Development and Computational Evaluation of a Parallel Branch-and-Price Algorithm' type: journal_article user_id: '61579' year: '2019' ... --- _id: '6514' abstract: - lang: eng text: Recommender Agents (RAs) facilitate consumers’ online purchase decisions for complex, multi-attribute products. As not all combinations of attribute levels can be obtained, users are forced into trade-offs. The exposure of trade-offs in a RA has been found to affect consumers’ perceptions. However, little is known about how different preference elicitation methods in RAs affect consumers by varying degrees of trade-off exposure. We propose a research model that investigates how different levels of trade-off exposure cognitively and affectively influence consumers’ satisfaction with RAs. We operationalize these levels in three different RA types and test our hypotheses in a laboratory experiment with 116 participants. Our results indicate that with increasing tradeoff exposure, perceived enjoyment and perceived control follow an inverted Ushaped relationship. Hence, RAs using preference elicitation methods with medium trade-off exposure yield highest consumer satisfaction. This contributes to the understanding of trade-offs in RAs and provides valuable implications to e-commerce practitioners. author: - first_name: Veronika full_name: Schuhbeck, Veronika last_name: Schuhbeck - first_name: Nils full_name: Siegfried, Nils last_name: Siegfried - first_name: Verena full_name: Dorner, Verena last_name: Dorner - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian - first_name: Michael full_name: Scholz, Michael last_name: Scholz - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schuhbeck V, Siegfried N, Dorner V, Benlian A, Scholz M, Schryen G. Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents. In: Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik. Siegen, Germany; 2019:55-64.' apa: 'Schuhbeck, V., Siegfried, N., Dorner, V., Benlian, A., Scholz, M., & Schryen, G. (2019). Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents. In Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik (pp. 55–64). Siegen, Germany.' bibtex: '@inproceedings{Schuhbeck_Siegfried_Dorner_Benlian_Scholz_Schryen_2019, place={Siegen, Germany}, title={Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents}, booktitle={Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik}, author={Schuhbeck, Veronika and Siegfried, Nils and Dorner, Verena and Benlian, Alexander and Scholz, Michael and Schryen, Guido}, year={2019}, pages={55–64} }' chicago: 'Schuhbeck, Veronika, Nils Siegfried, Verena Dorner, Alexander Benlian, Michael Scholz, and Guido Schryen. “Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents.” In Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik, 55–64. Siegen, Germany, 2019.' ieee: 'V. Schuhbeck, N. Siegfried, V. Dorner, A. Benlian, M. Scholz, and G. Schryen, “Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents,” in Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik, Siegen, Germany, 2019, pp. 55–64.' mla: 'Schuhbeck, Veronika, et al. “Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents.” Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik, 2019, pp. 55–64.' short: 'V. Schuhbeck, N. Siegfried, V. Dorner, A. Benlian, M. Scholz, G. Schryen, in: Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik, Siegen, Germany, 2019, pp. 55–64.' conference: end_date: 2019-02-27 location: Siegen, Germany name: 14th International Conference on Wirtschaftsinformatik start_date: 2019-02-24 date_created: 2019-01-08T14:06:32Z date_updated: 2022-01-06T07:03:09Z ddc: - '000' department: - _id: '277' file: - access_level: closed content_type: application/pdf creator: hsiemes date_created: 2019-01-08T14:07:17Z date_updated: 2021-08-13T13:26:11Z file_id: '6515' file_name: WALKING THE MIDDLE PATH.pdf file_size: 371490 relation: main_file - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2021-08-13T13:25:53Z date_updated: 2021-08-13T13:25:53Z file_id: '23393' file_name: Walking the Middle Path_ How Medium Trade-Off Exposure Leads to H.pdf file_size: 331001 relation: main_file file_date_updated: 2021-08-13T13:26:11Z has_accepted_license: '1' keyword: - Recommender Agents - Preference Elicitation Method - Trade-off Exposure - Customer Satisfaction language: - iso: eng oa: '1' page: 55-64 place: Siegen, Germany publication: Proceedings of the 14. Internationale Tagung Wirtschaftsinformatik status: public title: 'Walking the Middle Path: How Medium Trade-off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents' type: conference user_id: '61579' year: '2019' ... --- _id: '14890' author: - first_name: Stefan full_name: Kuhlemann, Stefan id: '38910' last_name: Kuhlemann - first_name: Meinolf full_name: Sellmann, Meinolf last_name: Sellmann - first_name: Kevin full_name: Tierney, Kevin last_name: Tierney citation: ama: 'Kuhlemann S, Sellmann M, Tierney K. Exploiting Counterfactuals for Scalable Stochastic Optimization. In: Lecture Notes in Computer Science. Cham; 2019. doi:10.1007/978-3-030-30048-7_40' apa: Kuhlemann, S., Sellmann, M., & Tierney, K. (2019). Exploiting Counterfactuals for Scalable Stochastic Optimization. In Lecture Notes in Computer Science. Cham. https://doi.org/10.1007/978-3-030-30048-7_40 bibtex: '@inbook{Kuhlemann_Sellmann_Tierney_2019, place={Cham}, title={Exploiting Counterfactuals for Scalable Stochastic Optimization}, DOI={10.1007/978-3-030-30048-7_40}, booktitle={Lecture Notes in Computer Science}, author={Kuhlemann, Stefan and Sellmann, Meinolf and Tierney, Kevin}, year={2019} }' chicago: Kuhlemann, Stefan, Meinolf Sellmann, and Kevin Tierney. “Exploiting Counterfactuals for Scalable Stochastic Optimization.” In Lecture Notes in Computer Science. Cham, 2019. https://doi.org/10.1007/978-3-030-30048-7_40. ieee: S. Kuhlemann, M. Sellmann, and K. Tierney, “Exploiting Counterfactuals for Scalable Stochastic Optimization,” in Lecture Notes in Computer Science, Cham, 2019. mla: Kuhlemann, Stefan, et al. “Exploiting Counterfactuals for Scalable Stochastic Optimization.” Lecture Notes in Computer Science, 2019, doi:10.1007/978-3-030-30048-7_40. short: 'S. Kuhlemann, M. Sellmann, K. Tierney, in: Lecture Notes in Computer Science, Cham, 2019.' date_created: 2019-11-12T07:45:53Z date_updated: 2022-01-06T06:52:09Z department: - _id: '277' doi: 10.1007/978-3-030-30048-7_40 language: - iso: eng place: Cham publication: Lecture Notes in Computer Science publication_identifier: isbn: - '9783030300470' - '9783030300487' issn: - 0302-9743 - 1611-3349 publication_status: published status: public title: Exploiting Counterfactuals for Scalable Stochastic Optimization type: book_chapter user_id: '38910' year: '2019' ... --- _id: '14540' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Natalia full_name: Kliewer, Natalia last_name: Kliewer - first_name: Ralf full_name: Borndörfer, Ralf last_name: Borndörfer - first_name: Thorsten full_name: Koch, Thorsten last_name: Koch citation: ama: Schryen G, Kliewer N, Borndörfer R, Koch T. High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis. OR News. 2019;65:34-35. apa: Schryen, G., Kliewer, N., Borndörfer, R., & Koch, T. (2019). High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis. OR News, 65, 34–35. bibtex: '@article{Schryen_Kliewer_Borndörfer_Koch_2019, title={High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis}, volume={65}, journal={OR News}, author={Schryen, Guido and Kliewer, Natalia and Borndörfer, Ralf and Koch, Thorsten}, year={2019}, pages={34–35} }' chicago: 'Schryen, Guido, Natalia Kliewer, Ralf Borndörfer, and Thorsten Koch. “High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis.” OR News 65 (2019): 34–35.' ieee: G. Schryen, N. Kliewer, R. Borndörfer, and T. Koch, “High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis,” OR News, vol. 65, pp. 34–35, 2019. mla: Schryen, Guido, et al. “High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis.” OR News, vol. 65, 2019, pp. 34–35. short: G. Schryen, N. Kliewer, R. Borndörfer, T. Koch, OR News 65 (2019) 34–35. date_created: 2019-11-04T17:00:30Z date_updated: 2022-01-06T06:52:02Z ddc: - '000' department: - _id: '277' file: - access_level: closed content_type: application/pdf creator: hsiemes date_created: 2019-11-05T10:09:05Z date_updated: 2019-11-05T10:09:05Z file_id: '14542' file_name: 1st International Workshop on HPBC.pdf file_size: 4631697 relation: main_file success: 1 file_date_updated: 2019-11-05T10:09:05Z has_accepted_license: '1' intvolume: ' 65' language: - iso: eng page: 34-35 publication: OR News status: public title: High-Performance Business Computing – Parallel Algorithms and Implementations for Solving Problems in Operations Research and Data Analysis type: journal_article user_id: '61579' volume: 65 year: '2019' ... --- _id: '5675' abstract: - lang: eng text: When responding to natural disasters, professional relief units are often supported by many volunteers which are not affiliated to humanitarian organizations. The effective coordination of these volunteers is crucial to leverage their capabilities and to avoid conflicts with professional relief units. In this paper, we empirically identify key requirements that professional relief units pose on this coordination. Based on these requirements, we suggest a decision model. We computationally solve a real-world instance of the model and empirically validate the computed solution in interviews with practitioners. Our results show that the suggested model allows for solving volunteer coordination tasks of realistic size near-optimally within short time, with the determined solution being well accepted by practitioners. We also describe in this article how the suggested decision support model is integrated in the volunteer coordination system which we develop in joint cooperation with a disaster management authority and a software development company. author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Rauchecker G, Schryen G. Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief. In: Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management. ; 2018.' apa: Rauchecker, G., & Schryen, G. (2018). Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief. In Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management. Rochester, NY, USA. bibtex: '@inproceedings{Rauchecker_Schryen_2018, title={Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief}, booktitle={Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2018} }' chicago: Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief.” In Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management, 2018. ieee: G. Rauchecker and G. Schryen, “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief,” in Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management, Rochester, NY, USA, 2018. mla: Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief.” Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management, 2018. short: 'G. Rauchecker, G. Schryen, in: Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management, 2018.' conference: location: Rochester, NY, USA name: 15th International Conference on Information Systems for Crisis Response and Management date_created: 2018-11-14T15:35:54Z date_updated: 2022-01-06T07:02:28Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:25:06Z date_updated: 2018-12-13T15:05:44Z file_id: '6020' file_name: 2018_ISCRAM_Conference_Proceedings - Publication Version.pdf file_size: 488472 relation: main_file file_date_updated: 2018-12-13T15:05:44Z has_accepted_license: '1' keyword: - Coordination of spontaneous volunteers - volunteer coordination system - decision support - scheduling optimization model - linear programming language: - iso: eng oa: '1' publication: Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management status: public title: Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief type: conference user_id: '61579' year: '2018' ... --- _id: '5681' author: - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Prester J, Wagner G, Schryen G. Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach. In: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA; 2018.' apa: 'Prester, J., Wagner, G., & Schryen, G. (2018). Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach. In Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA.' bibtex: '@inproceedings{Prester_Wagner_Schryen_2018, place={San Francisco, CA, USA}, title={Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach}, booktitle={Proceedings of the 2018 International Conference on Information Systems (ICIS 2018)}, author={Prester, Julian and Wagner, Gerit and Schryen, Guido}, year={2018} }' chicago: 'Prester, Julian, Gerit Wagner, and Guido Schryen. “Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach.” In Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA, 2018.' ieee: 'J. Prester, G. Wagner, and G. Schryen, “Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach,” in Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), San Francisco, CA, USA, 2018.' mla: 'Prester, Julian, et al. “Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach.” Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), 2018.' short: 'J. Prester, G. Wagner, G. Schryen, in: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), San Francisco, CA, USA, 2018.' conference: location: San Francisco, CA, USA name: Thirty Ninth International Conference on Information Systems date_created: 2018-11-14T15:41:39Z date_updated: 2022-01-06T07:02:31Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:25:55Z date_updated: 2018-12-13T15:05:57Z file_id: '6021' file_name: ICIS - 2018 - Classifying the Ideational Impact of IS Review Articles.pdf file_size: 336667 relation: main_file file_date_updated: 2018-12-13T15:05:57Z has_accepted_license: '1' language: - iso: eng oa: '1' place: San Francisco, CA, USA publication: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018) status: public title: 'Classifying the Ideational Impact of IS Review Articles: A Natural Language Processing Based Approach' type: conference user_id: '61579' year: '2018' ... --- _id: '6164' author: - first_name: Rolf full_name: Schillinger, Rolf last_name: Schillinger - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schillinger R, Schryen G. Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC. University of Regensburg; 2018. doi:10.5283/epub.36264 apa: Schillinger, R., & Schryen, G. (2018). Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC. University of Regensburg. https://doi.org/10.5283/epub.36264 bibtex: '@book{Schillinger_Schryen_2018, title={Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC}, DOI={10.5283/epub.36264}, publisher={University of Regensburg}, author={Schillinger, Rolf and Schryen, Guido}, year={2018} }' chicago: Schillinger, Rolf, and Guido Schryen. Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC. University of Regensburg, 2018. https://doi.org/10.5283/epub.36264. ieee: R. Schillinger and G. Schryen, Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC. University of Regensburg, 2018. mla: Schillinger, Rolf, and Guido Schryen. Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC. University of Regensburg, 2018, doi:10.5283/epub.36264. short: R. Schillinger, G. Schryen, Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC, University of Regensburg, 2018. date_created: 2018-12-11T13:39:45Z date_updated: 2022-01-06T07:02:54Z ddc: - '000' department: - _id: '277' doi: 10.5283/epub.36264 extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T13:42:43Z date_updated: 2018-12-13T15:21:02Z file_id: '6165' file_name: PUBLISHED BOOK - Security in Highly Connected IT Systems.pdf file_size: 1913774 relation: main_file file_date_updated: 2018-12-13T15:21:02Z has_accepted_license: '1' language: - iso: eng oa: '1' publication_identifier: isbn: - 978-3-88246-374-3 publisher: University of Regensburg status: public title: Security in Highly Connected IT Systems – Results of the Bavarian Research Alliance FORSEC type: book user_id: '61579' year: '2018' ... --- _id: '5586' abstract: - lang: eng text: The need to protect resources against attackers is reflected by huge information security investments of firms worldwide. In the presence of budget constraints and a diverse set of assets to protect, organizations have to decide in which IT security measures to invest, how to evaluate those investment decisions, and how to learn from past decisions to optimize future security investment actions. While the academic literature has provided valuable insights into these issues, there is a lack of empirical contributions. To address this lack, we conduct a theory-based exploratory multiple case study. Our case study reveals that (1) firms? investments in information security are largely driven by external environmental and industry-related factors, (2) firms do not implement standardized decision processes, (3) the security process is perceived to impact the business process in a disturbing way, (4) both the implementation of evaluation processes and the application of metrics are hardly existent and (5) learning activities mainly occur at an ad-hoc basis. author: - first_name: Eva full_name: Weishäupl, Eva last_name: Weishäupl - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Weishäupl E, Yasasin E, Schryen G. Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning. Computers & Security. 2018;77:807-823.' apa: 'Weishäupl, E., Yasasin, E., & Schryen, G. (2018). Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning. Computers & Security, 77, 807–823.' bibtex: '@article{Weishäupl_Yasasin_Schryen_2018, title={Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning}, volume={77}, journal={Computers & Security}, publisher={Elsevier}, author={Weishäupl, Eva and Yasasin, Emrah and Schryen, Guido}, year={2018}, pages={807–823} }' chicago: 'Weishäupl, Eva, Emrah Yasasin, and Guido Schryen. “Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning.” Computers & Security 77 (2018): 807–23.' ieee: 'E. Weishäupl, E. Yasasin, and G. Schryen, “Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning,” Computers & Security, vol. 77, pp. 807–823, 2018.' mla: 'Weishäupl, Eva, et al. “Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning.” Computers & Security, vol. 77, Elsevier, 2018, pp. 807–23.' short: E. Weishäupl, E. Yasasin, G. Schryen, Computers & Security 77 (2018) 807–823. date_created: 2018-11-14T11:24:37Z date_updated: 2022-01-06T07:02:03Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:26:53Z date_updated: 2018-12-13T15:06:10Z file_id: '6022' file_name: JOURNAL VERSION.pdf file_size: 809490 relation: main_file file_date_updated: 2018-12-13T15:06:10Z has_accepted_license: '1' intvolume: ' 77' keyword: - Information Security Investments - Multiple Case Study - Organizations - Single Loop Learning - Double Loop Learning language: - iso: eng oa: '1' page: 807 - 823 publication: Computers & Security publisher: Elsevier status: public title: 'Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning' type: journal_article user_id: '61579' volume: 77 year: '2018' ... --- _id: '5600' author: - first_name: Richard full_name: Schuster, Richard last_name: Schuster - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schuster R, Wagner G, Schryen G. Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study. In: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA; 2018.' apa: 'Schuster, R., Wagner, G., & Schryen, G. (2018). Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study. In Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA.' bibtex: '@inproceedings{Schuster_Wagner_Schryen_2018, place={San Francisco, CA, USA}, title={Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study}, booktitle={Proceedings of the 2018 International Conference on Information Systems (ICIS 2018)}, author={Schuster, Richard and Wagner, Gerit and Schryen, Guido}, year={2018} }' chicago: 'Schuster, Richard, Gerit Wagner, and Guido Schryen. “Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study.” In Proceedings of the 2018 International Conference on Information Systems (ICIS 2018). San Francisco, CA, USA, 2018.' ieee: 'R. Schuster, G. Wagner, and G. Schryen, “Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study,” in Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), San Francisco, CA, USA, 2018.' mla: 'Schuster, Richard, et al. “Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study.” Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), 2018.' short: 'R. Schuster, G. Wagner, G. Schryen, in: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018), San Francisco, CA, USA, 2018.' conference: location: San Francisco, CA, USA name: Thirty Ninth International Conference on Information Systems date_created: 2018-11-14T11:51:38Z date_updated: 2022-01-06T07:02:07Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:28:03Z date_updated: 2018-12-13T15:06:21Z file_id: '6023' file_name: paper345.pdf file_size: 1080982 relation: main_file file_date_updated: 2018-12-13T15:06:21Z has_accepted_license: '1' language: - iso: eng oa: '1' place: San Francisco, CA, USA publication: Proceedings of the 2018 International Conference on Information Systems (ICIS 2018) status: public title: 'Information Systems Design Science Research and Cumulative Knowledge Development: An Exploratory Study' type: conference user_id: '61579' year: '2018' ... --- _id: '14856' author: - first_name: Corinna full_name: Hallmann, Corinna last_name: Hallmann - first_name: Sascha Christian full_name: Burmeister, Sascha Christian id: '32685' last_name: Burmeister - first_name: Michaela full_name: Wissing, Michaela id: '32439' last_name: Wissing - first_name: Leena full_name: Suhl, Leena last_name: Suhl citation: ama: 'Hallmann C, Burmeister SC, Wissing M, Suhl L. Heuristics and Simulation for Water Tank Optimization. In: Communications in Computer and Information Science. Cham; 2018. doi:10.1007/978-3-319-96271-9_5' apa: Hallmann, C., Burmeister, S. C., Wissing, M., & Suhl, L. (2018). Heuristics and Simulation for Water Tank Optimization. In Communications in Computer and Information Science. Cham. https://doi.org/10.1007/978-3-319-96271-9_5 bibtex: '@inbook{Hallmann_Burmeister_Wissing_Suhl_2018, place={Cham}, title={Heuristics and Simulation for Water Tank Optimization}, DOI={10.1007/978-3-319-96271-9_5}, booktitle={Communications in Computer and Information Science}, author={Hallmann, Corinna and Burmeister, Sascha Christian and Wissing, Michaela and Suhl, Leena}, year={2018} }' chicago: Hallmann, Corinna, Sascha Christian Burmeister, Michaela Wissing, and Leena Suhl. “Heuristics and Simulation for Water Tank Optimization.” In Communications in Computer and Information Science. Cham, 2018. https://doi.org/10.1007/978-3-319-96271-9_5. ieee: C. Hallmann, S. C. Burmeister, M. Wissing, and L. Suhl, “Heuristics and Simulation for Water Tank Optimization,” in Communications in Computer and Information Science, Cham, 2018. mla: Hallmann, Corinna, et al. “Heuristics and Simulation for Water Tank Optimization.” Communications in Computer and Information Science, 2018, doi:10.1007/978-3-319-96271-9_5. short: 'C. Hallmann, S.C. Burmeister, M. Wissing, L. Suhl, in: Communications in Computer and Information Science, Cham, 2018.' date_created: 2019-11-08T08:10:10Z date_updated: 2022-01-06T06:52:08Z department: - _id: '277' doi: 10.1007/978-3-319-96271-9_5 language: - iso: eng place: Cham publication: Communications in Computer and Information Science publication_identifier: isbn: - '9783319962702' - '9783319962719' issn: - 1865-0929 - 1865-0937 publication_status: published status: public title: Heuristics and Simulation for Water Tank Optimization type: book_chapter user_id: '32439' year: '2018' ... --- _id: '14861' author: - first_name: Corinna full_name: Hallmann, Corinna last_name: Hallmann - first_name: Stefan full_name: Kuhlemann, Stefan id: '38910' last_name: Kuhlemann citation: ama: 'Hallmann C, Kuhlemann S. Model Generator for Water Distribution Systems. In: Operations Research Proceedings. Cham; 2018. doi:10.1007/978-3-319-89920-6_34' apa: Hallmann, C., & Kuhlemann, S. (2018). Model Generator for Water Distribution Systems. In Operations Research Proceedings. Cham. https://doi.org/10.1007/978-3-319-89920-6_34 bibtex: '@inbook{Hallmann_Kuhlemann_2018, place={Cham}, title={Model Generator for Water Distribution Systems}, DOI={10.1007/978-3-319-89920-6_34}, booktitle={Operations Research Proceedings}, author={Hallmann, Corinna and Kuhlemann, Stefan}, year={2018} }' chicago: Hallmann, Corinna, and Stefan Kuhlemann. “Model Generator for Water Distribution Systems.” In Operations Research Proceedings. Cham, 2018. https://doi.org/10.1007/978-3-319-89920-6_34. ieee: C. Hallmann and S. Kuhlemann, “Model Generator for Water Distribution Systems,” in Operations Research Proceedings, Cham, 2018. mla: Hallmann, Corinna, and Stefan Kuhlemann. “Model Generator for Water Distribution Systems.” Operations Research Proceedings, 2018, doi:10.1007/978-3-319-89920-6_34. short: 'C. Hallmann, S. Kuhlemann, in: Operations Research Proceedings, Cham, 2018.' date_created: 2019-11-08T08:27:37Z date_updated: 2022-01-06T06:52:08Z department: - _id: '277' doi: 10.1007/978-3-319-89920-6_34 language: - iso: eng place: Cham publication: Operations Research Proceedings publication_identifier: isbn: - '9783319899190' - '9783319899206' issn: - 0721-5924 - 2197-9294 publication_status: published status: public title: Model Generator for Water Distribution Systems type: book_chapter user_id: '38910' year: '2018' ... --- _id: '5692' abstract: - lang: eng text: We consider Max-min Share (MmS) fair allocations of indivisible chores (items with negative utilities). We show that allocation of chores and classical allocation of goods (items with positive utilities) have some fundamental connections but also differences which prevent a straightforward application of algorithms for goods in the chores setting and viceversa. We prove that an MmS allocation does not need to exist for chores and computing an MmS allocation - if it exists - is strongly NP-hard. In view of these non-existence and complexity results, we present a polynomial-time 2-approximation algorithm for MmS fairness for chores. We then introduce a new fairness concept called optimal MmS that represents the best possible allocation in terms of MmS that is guaranteed to exist. We use connections to parallel machine scheduling to give (1) a polynomial-time approximation scheme for computing an optimal MmS allocation when the number of agents is fixed and (2) an effective and efficient heuristic with an ex-post worst-case analysis. author: - first_name: Haris full_name: Aziz, Haris last_name: Aziz - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Toby full_name: Walsh, Toby last_name: Walsh citation: ama: 'Aziz H, Rauchecker G, Schryen G, Walsh T. Algorithms for Max-Min Share Fair Allocation of Indivisible Chores. In: Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17). Vol 31. ; 2017:1-7.' apa: Aziz, H., Rauchecker, G., Schryen, G., & Walsh, T. (2017). Algorithms for Max-Min Share Fair Allocation of Indivisible Chores. In Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17) (Vol. 31, pp. 1–7). San Francisco, CA, USA. bibtex: '@inproceedings{Aziz_Rauchecker_Schryen_Walsh_2017, title={Algorithms for Max-Min Share Fair Allocation of Indivisible Chores}, volume={31}, number={1}, booktitle={Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17)}, author={Aziz, Haris and Rauchecker, Gerhard and Schryen, Guido and Walsh, Toby}, year={2017}, pages={1–7} }' chicago: Aziz, Haris, Gerhard Rauchecker, Guido Schryen, and Toby Walsh. “Algorithms for Max-Min Share Fair Allocation of Indivisible Chores.” In Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17), 31:1–7, 2017. ieee: H. Aziz, G. Rauchecker, G. Schryen, and T. Walsh, “Algorithms for Max-Min Share Fair Allocation of Indivisible Chores,” in Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17), San Francisco, CA, USA, 2017, vol. 31, no. 1, pp. 1–7. mla: Aziz, Haris, et al. “Algorithms for Max-Min Share Fair Allocation of Indivisible Chores.” Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17), vol. 31, no. 1, 2017, pp. 1–7. short: 'H. Aziz, G. Rauchecker, G. Schryen, T. Walsh, in: Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17), 2017, pp. 1–7.' conference: location: San Francisco, CA, USA name: Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17) date_created: 2018-11-14T15:49:54Z date_updated: 2022-01-06T07:02:35Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: closed content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:30:25Z date_updated: 2021-08-13T13:55:29Z file_id: '6024' file_name: aziz_rauchecker_schryen_walsh.pdf file_size: 732005 relation: main_file - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2021-08-13T13:55:14Z date_updated: 2021-08-13T13:55:14Z file_id: '23394' file_name: 10582-Article Text-14110-1-2-20201228.pdf file_size: 738751 relation: main_file file_date_updated: 2021-08-13T13:55:29Z has_accepted_license: '1' intvolume: ' 31' issue: '1' language: - iso: eng oa: '1' page: 1-7 publication: Thirty-First AAAI Conference on Artificial Intelligence (AAAI-17) status: public title: Algorithms for Max-Min Share Fair Allocation of Indivisible Chores type: conference user_id: '61579' volume: 31 year: '2017' ... --- _id: '5594' abstract: - lang: eng text: Design science is a fundamental research stream that contends its position in the information systems discipline. While ongoing debates address the relative importance of design science contributions in the information systems community, insights into the scientific impact of design science research (DSR) are missing and this lack of understanding arguably poses challenges to an informed discourse. To identify the most influential papers and those factors that explain their scientific impact, this paper presents an exploratory study of the scientific impact of DSR papers published in the AIS Senior Scholars' Basket of Journals. We uncover the current DSR landscape by taking stock of influential papers and theories and develop a model to explain the scientific impact of DSR papers. Our findings show that scientific impact is significantly explained by theorization and novelty. We discuss how the implications of our work can be projected on the overarching discourse on DSR. author: - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Wagner G, Prester J, Schryen G. Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study. In: 38th International Conference on Information Systems. ; 2017.' apa: 'Wagner, G., Prester, J., & Schryen, G. (2017). Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study. In 38th International Conference on Information Systems. Seoul, South Korea.' bibtex: '@inproceedings{Wagner_Prester_Schryen_2017, title={Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study}, booktitle={38th International Conference on Information Systems}, author={Wagner, Gerit and Prester, Julian and Schryen, Guido}, year={2017} }' chicago: 'Wagner, Gerit, Julian Prester, and Guido Schryen. “Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study.” In 38th International Conference on Information Systems, 2017.' ieee: 'G. Wagner, J. Prester, and G. Schryen, “Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study,” in 38th International Conference on Information Systems, Seoul, South Korea, 2017.' mla: 'Wagner, Gerit, et al. “Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study.” 38th International Conference on Information Systems, 2017.' short: 'G. Wagner, J. Prester, G. Schryen, in: 38th International Conference on Information Systems, 2017.' conference: location: Seoul, South Korea name: 38th International Conference on Information Systems date_created: 2018-11-14T11:33:56Z date_updated: 2022-01-06T07:02:05Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:31:37Z date_updated: 2018-12-13T15:07:05Z file_id: '6026' file_name: ICIS2017-Revision.pdf file_size: 223790 relation: main_file file_date_updated: 2018-12-13T15:07:05Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-sa/4.0/ oa: '1' publication: 38th International Conference on Information Systems status: public title: 'Exploring the Scientific Impact of Information Systems Design Science Research: A Scientometric Study' type: conference user_id: '61579' year: '2017' ... --- _id: '5626' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Diana full_name: Hristova, Diana last_name: Hristova citation: ama: Schryen G, Hristova D. High-Performance Business Computing - Effizienzsteigerung durch Parallelisierung. Smart Data Radar (Deutsche Bank). 2017. apa: Schryen, G., & Hristova, D. (2017). High-Performance Business Computing - Effizienzsteigerung durch Parallelisierung. Smart Data Radar (Deutsche Bank). bibtex: '@article{Schryen_Hristova_2017, title={High-Performance Business Computing - Effizienzsteigerung durch Parallelisierung}, journal={Smart Data Radar (Deutsche Bank)}, author={Schryen, Guido and Hristova, Diana}, year={2017} }' chicago: Schryen, Guido, and Diana Hristova. “High-Performance Business Computing - Effizienzsteigerung Durch Parallelisierung.” Smart Data Radar (Deutsche Bank), 2017. ieee: G. Schryen and D. Hristova, “High-Performance Business Computing - Effizienzsteigerung durch Parallelisierung,” Smart Data Radar (Deutsche Bank), 2017. mla: Schryen, Guido, and Diana Hristova. “High-Performance Business Computing - Effizienzsteigerung Durch Parallelisierung.” Smart Data Radar (Deutsche Bank), 2017. short: G. Schryen, D. Hristova, Smart Data Radar (Deutsche Bank) (2017). date_created: 2018-11-14T14:17:44Z date_updated: 2022-01-06T07:02:13Z department: - _id: '277' extern: '1' language: - iso: eng publication: Smart Data Radar (Deutsche Bank) status: public title: High-Performance Business Computing - Effizienzsteigerung durch Parallelisierung type: journal_article user_id: '61579' year: '2017' ... --- _id: '5633' abstract: - lang: eng text: 'Literature reviews (LRs) are recognized for their increasing impact in the information systems literature. Methodologists have drawn attention to the question of how we can leverage the value of LRs to preserve and generate knowledge. The panelists who participated in the discussion of ?Standalone Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?? at ICIS 2016 in Dublin acknowledged this significant issue and debated a) what the IS field can learn from other fields and where IS-specific challenges occur, b) how the IS field should move forward to foster the genre of LRs, and c) what best practices are to train doctoral IS students in publishing LRs. This article reports the key takeaways of this panel discussion. Guidance for IS scholars is provided on how to conduct LRs that contribute to the cumulative knowledge development within and across the IS field to best prepare the next generation of IS scholars.' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian - first_name: Frantz full_name: Rowe, Frantz last_name: Rowe - first_name: Gregor full_name: Shirley, Gregor last_name: Shirley - first_name: Kai full_name: Larsen, Kai last_name: Larsen - first_name: Stacie full_name: Petter, Stacie last_name: Petter - first_name: Guy full_name: Par{\'e}, Guy last_name: Par{\'e} - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Steffi full_name: Haag, Steffi last_name: Haag - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin citation: ama: 'Schryen G, Benlian A, Rowe F, et al. Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields? Communications of the AIS. 2017;40:557-569.' apa: 'Schryen, G., Benlian, A., Rowe, F., Shirley, G., Larsen, K., Petter, S., … Yasasin, E. (2017). Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields? Communications of the AIS, 40, 557–569.' bibtex: '@article{Schryen_Benlian_Rowe_Shirley_Larsen_Petter_Par{\’e}_Wagner_Haag_Yasasin_2017, title={Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?}, volume={40}, journal={Communications of the AIS}, publisher={Association for Information Systems (AIS)}, author={Schryen, Guido and Benlian, Alexander and Rowe, Frantz and Shirley, Gregor and Larsen, Kai and Petter, Stacie and Par{\’e}, Guy and Wagner, Gerit and Haag, Steffi and Yasasin, Emrah}, year={2017}, pages={557–569} }' chicago: 'Schryen, Guido, Alexander Benlian, Frantz Rowe, Gregor Shirley, Kai Larsen, Stacie Petter, Guy Par{\’e}, Gerit Wagner, Steffi Haag, and Emrah Yasasin. “Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?” Communications of the AIS 40 (2017): 557–69.' ieee: 'G. Schryen et al., “Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?,” Communications of the AIS, vol. 40, pp. 557–569, 2017.' mla: 'Schryen, Guido, et al. “Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?” Communications of the AIS, vol. 40, Association for Information Systems (AIS), 2017, pp. 557–69.' short: G. Schryen, A. Benlian, F. Rowe, G. Shirley, K. Larsen, S. Petter, G. Par{\’e}, G. Wagner, S. Haag, E. Yasasin, Communications of the AIS 40 (2017) 557–569. date_created: 2018-11-14T14:25:40Z date_updated: 2022-01-06T07:02:14Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:33:59Z date_updated: 2018-12-13T15:07:15Z file_id: '6027' file_name: Schryen et al. (forthcoming), Literature Reviews in IS Research, What Can Be Learnt from the Past and Other Fields, Communications of th.pdf file_size: 361850 relation: main_file file_date_updated: 2018-12-13T15:07:15Z has_accepted_license: '1' intvolume: ' 40' keyword: - Literature Review - Review Methodology - Research Methodology - Doctoral Training language: - iso: eng oa: '1' page: 557 - 569 publication: Communications of the AIS publication_identifier: issn: - 1529-3181 publisher: Association for Information Systems (AIS) status: public title: 'Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?' type: journal_article user_id: '61579' volume: 40 year: '2017' ... --- _id: '5671' abstract: - lang: eng text: Multi-attribute value theory (MAVT)-based recommender systems have been proposed for dealing with issues of existing recommender systems, such as the cold-start problem and changing preferences. However, as we argue in this paper, existing MAVT-based methods for measuring attribute importance weights do not fit the shopping tasks for which recommender systems are typically used. These methods assume well-trained decision makers who are willing to invest time and cognitive effort, and who are familiar with the attributes describing the available alternatives and the ranges of these attribute levels. Yet, recommender systems are most often used by consumers who are usually not familiar with the available attributes and ranges and who wish to save time and effort. Against this background, we develop a new method, based on a product configuration process, which is tailored to the characteristics of these particular decision makers. We empirically compare our method to SWING, ranking-based conjoint analysis and TRADEOFF in a between-subjects laboratory experiment with 153 participants. Results indicate that our proposed method performs better than TRADEOFF and CONJOINT and at least as well as SWING in terms of recommendation accuracy, better than SWING and TRADEOFF and at least as well as CONJOINT in terms of cognitive load, and that participants were faster with our method than with any other method. We conclude that our method is a promising option to help support consumers' decision processes in e-commerce shopping tasks. author: - first_name: Michael full_name: Scholz, Michael last_name: Scholz - first_name: Verena full_name: Dorner, Verena last_name: Dorner - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian citation: ama: Scholz M, Dorner V, Schryen G, Benlian A. A configuration-based recommender system for supporting e-commerce decisions. European Journal of Operational Research. 2017;259(1):205-215. apa: Scholz, M., Dorner, V., Schryen, G., & Benlian, A. (2017). A configuration-based recommender system for supporting e-commerce decisions. European Journal of Operational Research, 259(1), 205–215. bibtex: '@article{Scholz_Dorner_Schryen_Benlian_2017, title={A configuration-based recommender system for supporting e-commerce decisions}, volume={259}, number={1}, journal={European Journal of Operational Research}, publisher={Elsevier}, author={Scholz, Michael and Dorner, Verena and Schryen, Guido and Benlian, Alexander}, year={2017}, pages={205–215} }' chicago: 'Scholz, Michael, Verena Dorner, Guido Schryen, and Alexander Benlian. “A Configuration-Based Recommender System for Supporting e-Commerce Decisions.” European Journal of Operational Research 259, no. 1 (2017): 205–15.' ieee: M. Scholz, V. Dorner, G. Schryen, and A. Benlian, “A configuration-based recommender system for supporting e-commerce decisions,” European Journal of Operational Research, vol. 259, no. 1, pp. 205–215, 2017. mla: Scholz, Michael, et al. “A Configuration-Based Recommender System for Supporting e-Commerce Decisions.” European Journal of Operational Research, vol. 259, no. 1, Elsevier, 2017, pp. 205–15. short: M. Scholz, V. Dorner, G. Schryen, A. Benlian, European Journal of Operational Research 259 (2017) 205–215. date_created: 2018-11-14T15:06:18Z date_updated: 2022-01-06T07:02:27Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:30:59Z date_updated: 2018-12-13T15:06:56Z file_id: '6025' file_name: EJOR article.pdf file_size: 762889 relation: main_file file_date_updated: 2018-12-13T15:06:56Z has_accepted_license: '1' intvolume: ' 259' issue: '1' keyword: - E-Commerce - Recommender System - Attribute Weights - Configuration System - Decision Support language: - iso: eng oa: '1' page: 205 - 215 publication: European Journal of Operational Research publisher: Elsevier status: public title: A configuration-based recommender system for supporting e-commerce decisions type: journal_article user_id: '61579' volume: 259 year: '2017' ... --- _id: '14857' author: - first_name: Michaela full_name: Beckschäfer, Michaela id: '32439' last_name: Beckschäfer - first_name: Simon full_name: Malberg, Simon last_name: Malberg - first_name: Kevin full_name: Tierney, Kevin last_name: Tierney - first_name: Christoph full_name: Weskamp, Christoph last_name: Weskamp citation: ama: 'Beckschäfer M, Malberg S, Tierney K, Weskamp C. Simulating Storage Policies for an Automated Grid-Based Warehouse System. In: Lecture Notes in Computer Science. Cham; 2017. doi:10.1007/978-3-319-68496-3_31' apa: Beckschäfer, M., Malberg, S., Tierney, K., & Weskamp, C. (2017). Simulating Storage Policies for an Automated Grid-Based Warehouse System. In Lecture Notes in Computer Science. Cham. https://doi.org/10.1007/978-3-319-68496-3_31 bibtex: '@inbook{Beckschäfer_Malberg_Tierney_Weskamp_2017, place={Cham}, title={Simulating Storage Policies for an Automated Grid-Based Warehouse System}, DOI={10.1007/978-3-319-68496-3_31}, booktitle={Lecture Notes in Computer Science}, author={Beckschäfer, Michaela and Malberg, Simon and Tierney, Kevin and Weskamp, Christoph}, year={2017} }' chicago: Beckschäfer, Michaela, Simon Malberg, Kevin Tierney, and Christoph Weskamp. “Simulating Storage Policies for an Automated Grid-Based Warehouse System.” In Lecture Notes in Computer Science. Cham, 2017. https://doi.org/10.1007/978-3-319-68496-3_31. ieee: M. Beckschäfer, S. Malberg, K. Tierney, and C. Weskamp, “Simulating Storage Policies for an Automated Grid-Based Warehouse System,” in Lecture Notes in Computer Science, Cham, 2017. mla: Beckschäfer, Michaela, et al. “Simulating Storage Policies for an Automated Grid-Based Warehouse System.” Lecture Notes in Computer Science, 2017, doi:10.1007/978-3-319-68496-3_31. short: 'M. Beckschäfer, S. Malberg, K. Tierney, C. Weskamp, in: Lecture Notes in Computer Science, Cham, 2017.' date_created: 2019-11-08T08:15:11Z date_updated: 2022-01-06T06:52:08Z department: - _id: '277' doi: 10.1007/978-3-319-68496-3_31 language: - iso: eng place: Cham publication: Lecture Notes in Computer Science publication_identifier: isbn: - '9783319684956' - '9783319684963' issn: - 0302-9743 - 1611-3349 publication_status: published status: public title: Simulating Storage Policies for an Automated Grid-Based Warehouse System type: book_chapter user_id: '1112' year: '2017' ... --- _id: '5676' author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Rauchecker G, Schryen G. Projekt KUBAS: Koordination ungebundener Vor-Ort-Helfer. Im Einsatz. 2016;23:44-46.' apa: 'Rauchecker, G., & Schryen, G. (2016). Projekt KUBAS: Koordination ungebundener Vor-Ort-Helfer. Im Einsatz, 23, 44–46.' bibtex: '@article{Rauchecker_Schryen_2016, title={Projekt KUBAS: Koordination ungebundener Vor-Ort-Helfer}, volume={23}, journal={Im Einsatz}, publisher={Stumpf & Kossendey}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2016}, pages={44–46} }' chicago: 'Rauchecker, Gerhard, and Guido Schryen. “Projekt KUBAS: Koordination Ungebundener Vor-Ort-Helfer.” Im Einsatz 23 (2016): 44–46.' ieee: 'G. Rauchecker and G. Schryen, “Projekt KUBAS: Koordination ungebundener Vor-Ort-Helfer,” Im Einsatz, vol. 23, pp. 44–46, 2016.' mla: 'Rauchecker, Gerhard, and Guido Schryen. “Projekt KUBAS: Koordination Ungebundener Vor-Ort-Helfer.” Im Einsatz, vol. 23, Stumpf & Kossendey, 2016, pp. 44–46.' short: G. Rauchecker, G. Schryen, Im Einsatz 23 (2016) 44–46. date_created: 2018-11-14T15:36:29Z date_updated: 2022-01-06T07:02:29Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:37:52Z date_updated: 2018-12-13T15:07:24Z file_id: '6028' file_name: 44-46_Rauchecker_IE_5-2016.pdf file_size: 1068832 relation: main_file file_date_updated: 2018-12-13T15:07:24Z has_accepted_license: '1' intvolume: ' 23' language: - iso: eng oa: '1' page: 44-46 publication: Im Einsatz publisher: Stumpf & Kossendey status: public title: 'Projekt KUBAS: Koordination ungebundener Vor-Ort-Helfer' type: journal_article user_id: '61579' volume: 23 year: '2016' ... --- _id: '5595' author: - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Maria full_name: Roche, Maria last_name: Roche - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Wagner G, Prester J, Roche M, Benlian A, Schryen G. Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study. In: International Conference on Information Systems. ; 2016.' apa: 'Wagner, G., Prester, J., Roche, M., Benlian, A., & Schryen, G. (2016). Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study. In International Conference on Information Systems.' bibtex: '@inproceedings{Wagner_Prester_Roche_Benlian_Schryen_2016, title={Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study}, booktitle={International Conference on Information Systems}, author={Wagner, Gerit and Prester, Julian and Roche, Maria and Benlian, Alexander and Schryen, Guido}, year={2016} }' chicago: 'Wagner, Gerit, Julian Prester, Maria Roche, Alexander Benlian, and Guido Schryen. “Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study.” In International Conference on Information Systems, 2016.' ieee: 'G. Wagner, J. Prester, M. Roche, A. Benlian, and G. Schryen, “Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study,” in International Conference on Information Systems, 2016.' mla: 'Wagner, Gerit, et al. “Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study.” International Conference on Information Systems, 2016.' short: 'G. Wagner, J. Prester, M. Roche, A. Benlian, G. Schryen, in: International Conference on Information Systems, 2016.' date_created: 2018-11-14T11:34:31Z date_updated: 2022-01-06T07:02:05Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:38:41Z date_updated: 2018-12-13T15:08:15Z file_id: '6030' file_name: ICIS2016 - Factors Affecting the Scientific Impact of Literature Reviews.pdf file_size: 725409 relation: main_file file_date_updated: 2018-12-13T15:08:15Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: International Conference on Information Systems status: public title: 'Factors Affecting the Scientific Impact of Literature Reviews: A Scientometric Study' type: conference user_id: '61579' year: '2016' ... --- _id: '5617' abstract: - lang: eng text: CAPTCHAs are challenge-response tests that aim at preventing unwanted machines, including bots, from accessing web services while providing easy access for humans. Recent advances in artificial-intelligence based attacks show that the level of security provided by many state-of-the-art text-based CAPTCHAs is declining. At the same time, techniques for distorting and obscuring the text, which are used to maintain the level of security, make text-based CAPTCHAs diffcult to solve for humans, and thereby further degrade usability. The need for developing alternative types of CAPTCHAs which improve both, the current security and usability levels, has been emphasized by several researchers. With this study, we contribute to research through (1) the development of two new face recognition CAPTCHAs (Farett-Gender and Farett-Gender&Age), (2) the security analysis of both procedures, and (3) the provision of empirical evidence that one of the suggested CAPTCHAs (Farett-Gender) is similar to Google's reCAPTCHA and better than KCAPTCHA concerning effectiveness (error rates), superior to both regarding learnability and satisfaction but not effciency. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Alexander full_name: Schlegel, Alexander last_name: Schlegel citation: ama: 'Schryen G, Wagner G, Schlegel A. Development of two novel face-recognition CAPTCHAs: a security and usability study. Computers & Security. 2016;60(July):95-116.' apa: 'Schryen, G., Wagner, G., & Schlegel, A. (2016). Development of two novel face-recognition CAPTCHAs: a security and usability study. Computers & Security, 60(July), 95–116.' bibtex: '@article{Schryen_Wagner_Schlegel_2016, title={Development of two novel face-recognition CAPTCHAs: a security and usability study}, volume={60}, number={July}, journal={Computers & Security}, publisher={Elsevier}, author={Schryen, Guido and Wagner, Gerit and Schlegel, Alexander}, year={2016}, pages={95–116} }' chicago: 'Schryen, Guido, Gerit Wagner, and Alexander Schlegel. “Development of Two Novel Face-Recognition CAPTCHAs: A Security and Usability Study.” Computers & Security 60, no. July (2016): 95–116.' ieee: 'G. Schryen, G. Wagner, and A. Schlegel, “Development of two novel face-recognition CAPTCHAs: a security and usability study,” Computers & Security, vol. 60, no. July, pp. 95–116, 2016.' mla: 'Schryen, Guido, et al. “Development of Two Novel Face-Recognition CAPTCHAs: A Security and Usability Study.” Computers & Security, vol. 60, no. July, Elsevier, 2016, pp. 95–116.' short: G. Schryen, G. Wagner, A. Schlegel, Computers & Security 60 (2016) 95–116. date_created: 2018-11-14T14:00:47Z date_updated: 2022-01-06T07:02:10Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:38:19Z date_updated: 2018-12-13T15:07:36Z file_id: '6029' file_name: cose_991_final.pdf file_size: 2983143 relation: main_file file_date_updated: 2018-12-13T15:07:36Z has_accepted_license: '1' intvolume: ' 60' issue: July keyword: - CAPTCHA - Usability - Facial features - Gender classiffcation - Age classification - Face recognition reverse Turing test language: - iso: eng oa: '1' page: 95-116 publication: Computers & Security publisher: Elsevier status: public title: 'Development of two novel face-recognition CAPTCHAs: a security and usability study' type: journal_article user_id: '61579' volume: 60 year: '2016' ... --- _id: '5678' abstract: - lang: eng text: Many academic disciplines - including information systems, computer science, and operations management - face scheduling problems as important decision making tasks. Since many scheduling problems are NP-hard in the strong sense, there is a need for developing solution heuristics. For scheduling problems with setup times on unrelated parallel machines, there is limited research on solution methods and to the best of our knowledge, parallel computer architectures have not yet been taken advantage of. We address this gap by proposing and implementing a new solution heuristic and by testing different parallelization strategies. In our computational experiments, we show that our heuristic calculates near-optimal solutions even for large instances and that computing time can be reduced substantially by our parallelization approach. author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Rauchecker G, Schryen G. High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic. In: Australasian Conference on Information Systems. ; 2015:1-13.' apa: 'Rauchecker, G., & Schryen, G. (2015). High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic. In Australasian Conference on Information Systems (pp. 1–13).' bibtex: '@inproceedings{Rauchecker_Schryen_2015, title={High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic}, booktitle={Australasian Conference on Information Systems}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2015}, pages={1–13} }' chicago: 'Rauchecker, Gerhard, and Guido Schryen. “High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic.” In Australasian Conference on Information Systems, 1–13, 2015.' ieee: 'G. Rauchecker and G. Schryen, “High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic,” in Australasian Conference on Information Systems, 2015, pp. 1–13.' mla: 'Rauchecker, Gerhard, and Guido Schryen. “High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic.” Australasian Conference on Information Systems, 2015, pp. 1–13.' short: 'G. Rauchecker, G. Schryen, in: Australasian Conference on Information Systems, 2015, pp. 1–13.' date_created: 2018-11-14T15:39:50Z date_updated: 2022-01-06T07:02:30Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:40:18Z date_updated: 2018-12-13T15:08:28Z file_id: '6031' file_name: ACIS_2015_paper_7.pdf file_size: 6771871 relation: main_file file_date_updated: 2018-12-13T15:08:28Z has_accepted_license: '1' keyword: - scheduling - decision support - heuristic - high performance computing - parallel algorithms language: - iso: eng oa: '1' page: 1-13 publication: Australasian Conference on Information Systems status: public title: 'High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic' type: conference user_id: '61579' year: '2015' ... --- _id: '5679' abstract: - lang: eng text: Cloud computing promises the flexible delivery of computing services in a pay-as-you-go manner. It allows customers to easily scale their infrastructure and save on the overall cost of operation. However Cloud service offerings can only thrive if customers are satisfied with service performance. Allow-ing instantaneous access and flexible scaling while maintaining the service levels and offering competitive prices poses a significant challenge to Cloud Computing providers. Furthermore services will remain available in the long run only if this business generates a stable revenue stream. To address these challenges we introduce novel policy-based service admission control mod-els that aim at maximizing the revenue of Cloud providers while taking in-formational uncertainty regarding resource requirements into account. Our evaluation shows that policy-based approaches statistically significantly out-perform first come first serve approaches, which are still state of the art. Furthermore the results give insights in how and to what extent uncertainty has a negative impact on revenue. author: - first_name: Tim full_name: Püschel, Tim last_name: Püschel - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Diana full_name: Hristova, Diana last_name: Hristova - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Püschel T, Schryen G, Hristova D, Neumann D. Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty. European Journal of Operational Research. 2015;244(2):637-647.' apa: 'Püschel, T., Schryen, G., Hristova, D., & Neumann, D. (2015). Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty. European Journal of Operational Research, 244(2), 637–647.' bibtex: '@article{Püschel_Schryen_Hristova_Neumann_2015, title={Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty}, volume={244}, number={2}, journal={European Journal of Operational Research}, publisher={Elsevier}, author={Püschel, Tim and Schryen, Guido and Hristova, Diana and Neumann, Dirk}, year={2015}, pages={637–647} }' chicago: 'Püschel, Tim, Guido Schryen, Diana Hristova, and Dirk Neumann. “Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-Probabilistic Uncertainty.” European Journal of Operational Research 244, no. 2 (2015): 637–47.' ieee: 'T. Püschel, G. Schryen, D. Hristova, and D. Neumann, “Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty,” European Journal of Operational Research, vol. 244, no. 2, pp. 637–647, 2015.' mla: 'Püschel, Tim, et al. “Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-Probabilistic Uncertainty.” European Journal of Operational Research, vol. 244, no. 2, Elsevier, 2015, pp. 637–47.' short: T. Püschel, G. Schryen, D. Hristova, D. Neumann, European Journal of Operational Research 244 (2015) 637–647. date_created: 2018-11-14T15:40:13Z date_updated: 2022-01-06T07:02:30Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:44:10Z date_updated: 2018-12-13T15:09:12Z file_id: '6036' file_name: ELSEVIER_JOURNAL_VERSION.pdf file_size: 1270024 relation: main_file file_date_updated: 2018-12-13T15:09:12Z has_accepted_license: '1' intvolume: ' 244' issue: '2' keyword: - admission control - informational uncertainty - revenue management - cloud computing language: - iso: eng oa: '1' page: 637-647 publication: European Journal of Operational Research publisher: Elsevier status: public title: 'Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty' type: journal_article user_id: '61579' volume: 244 year: '2015' ... --- _id: '5541' author: - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Yasasin E, Schryen G. Requirements for IT Security Metrics - An Argumentation Theory Based Approach. In: 23rd European Conference on Information Systems (ECIS 2015). ; 2015.' apa: Yasasin, E., & Schryen, G. (2015). Requirements for IT Security Metrics - An Argumentation Theory Based Approach. In 23rd European Conference on Information Systems (ECIS 2015). bibtex: '@inproceedings{Yasasin_Schryen_2015, title={Requirements for IT Security Metrics - An Argumentation Theory Based Approach}, booktitle={23rd European Conference on Information Systems (ECIS 2015)}, author={Yasasin, Emrah and Schryen, Guido}, year={2015} }' chicago: Yasasin, Emrah, and Guido Schryen. “Requirements for IT Security Metrics - An Argumentation Theory Based Approach.” In 23rd European Conference on Information Systems (ECIS 2015), 2015. ieee: E. Yasasin and G. Schryen, “Requirements for IT Security Metrics - An Argumentation Theory Based Approach,” in 23rd European Conference on Information Systems (ECIS 2015), 2015. mla: Yasasin, Emrah, and Guido Schryen. “Requirements for IT Security Metrics - An Argumentation Theory Based Approach.” 23rd European Conference on Information Systems (ECIS 2015), 2015. short: 'E. Yasasin, G. Schryen, in: 23rd European Conference on Information Systems (ECIS 2015), 2015.' date_created: 2018-11-13T14:45:25Z date_updated: 2022-01-06T07:01:58Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:43:06Z date_updated: 2018-12-13T15:08:50Z file_id: '6034' file_name: ECIS - Proceedings version1.pdf file_size: 669105 relation: main_file file_date_updated: 2018-12-13T15:08:50Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 23rd European Conference on Information Systems (ECIS 2015) status: public title: Requirements for IT Security Metrics - An Argumentation Theory Based Approach type: conference user_id: '61579' year: '2015' ... --- _id: '5588' abstract: - lang: eng text: The protection of information technology (IT) has become and is predicted to remain a key economic challenge for organizations. While research on IT security investment is fast growing, it lacks a theoretical basis for structuring research, explaining economic-technological phenomena and guide future research. We address this shortcoming by suggesting a new theoretical model emerging from a multi-theoretical perspective adopt-ing the Resource-Based View and the Organizational Learning Theory. The joint appli-cation of these theories allows to conceptualize in one theoretical model the organiza-tional learning effects that occur when the protection of organizational resources through IT security countermeasures develops over time. We use this model of IT security invest-ments to synthesize findings of a large body of literature and to derive research gaps. We also discuss managerial implications of (closing) these gaps by providing practical ex-amples. author: - first_name: Eva full_name: Weishäupl, Eva last_name: Weishäupl - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Weishäupl E, Yasasin E, Schryen G. A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory. In: International Conference on Information Systems. ; 2015.' apa: Weishäupl, E., Yasasin, E., & Schryen, G. (2015). A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory. In International Conference on Information Systems. bibtex: '@inproceedings{Weishäupl_Yasasin_Schryen_2015, title={A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory}, booktitle={International Conference on Information Systems}, author={Weishäupl, Eva and Yasasin, Emrah and Schryen, Guido}, year={2015} }' chicago: Weishäupl, Eva, Emrah Yasasin, and Guido Schryen. “A Multi-Theoretical Literature Review on Information Security Investments Using the Resource-Based View and the Organizational Learning Theory.” In International Conference on Information Systems, 2015. ieee: E. Weishäupl, E. Yasasin, and G. Schryen, “A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory,” in International Conference on Information Systems, 2015. mla: Weishäupl, Eva, et al. “A Multi-Theoretical Literature Review on Information Security Investments Using the Resource-Based View and the Organizational Learning Theory.” International Conference on Information Systems, 2015. short: 'E. Weishäupl, E. Yasasin, G. Schryen, in: International Conference on Information Systems, 2015.' date_created: 2018-11-14T11:25:38Z date_updated: 2022-01-06T07:02:03Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:45:31Z date_updated: 2018-12-13T15:09:32Z file_id: '6038' file_name: ICIS PROCEEDINGS PAPER - Security Investments.pdf file_size: 958019 relation: main_file file_date_updated: 2018-12-13T15:09:32Z has_accepted_license: '1' keyword: - Information Security - Investment - Literature review - Resource-based View - Organi-zational Learning Theory - Multi-theoretical Perspective language: - iso: eng oa: '1' publication: International Conference on Information Systems status: public title: A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory type: conference user_id: '61579' year: '2015' ... --- _id: '5589' author: - first_name: Eva full_name: Weishäupl, Eva last_name: Weishäupl - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Weishäupl E, Yasasin E, Schryen G. IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review. In: 23rd European Conference on Information Systems (ECIS 2015). ; 2015.' apa: 'Weishäupl, E., Yasasin, E., & Schryen, G. (2015). IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review. In 23rd European Conference on Information Systems (ECIS 2015).' bibtex: '@inproceedings{Weishäupl_Yasasin_Schryen_2015, title={IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review}, booktitle={23rd European Conference on Information Systems (ECIS 2015)}, author={Weishäupl, Eva and Yasasin, Emrah and Schryen, Guido}, year={2015} }' chicago: 'Weishäupl, Eva, Emrah Yasasin, and Guido Schryen. “IT Security Investments Through the Lens of the Resource-Based View: A New Theoretical Model and Literature Review.” In 23rd European Conference on Information Systems (ECIS 2015), 2015.' ieee: 'E. Weishäupl, E. Yasasin, and G. Schryen, “IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review,” in 23rd European Conference on Information Systems (ECIS 2015), 2015.' mla: 'Weishäupl, Eva, et al. “IT Security Investments Through the Lens of the Resource-Based View: A New Theoretical Model and Literature Review.” 23rd European Conference on Information Systems (ECIS 2015), 2015.' short: 'E. Weishäupl, E. Yasasin, G. Schryen, in: 23rd European Conference on Information Systems (ECIS 2015), 2015.' date_created: 2018-11-14T11:26:15Z date_updated: 2022-01-06T07:02:03Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:43:38Z date_updated: 2018-12-13T15:09:01Z file_id: '6035' file_name: ECIS - Proceedings version2.pdf file_size: 334025 relation: main_file file_date_updated: 2018-12-13T15:09:01Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 23rd European Conference on Information Systems (ECIS 2015) status: public title: 'IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review' type: conference user_id: '61579' year: '2015' ... --- _id: '5590' abstract: - lang: eng text: 'Nowadays, providing employees with failure-free access to various systems, applications and services is a crucial factor for organizations? success as disturbances potentially inhibit smooth workflows and thereby harm productivity. However, it is a challenging task to assign access rights to employees? accounts within a satisfying time frame. In addition, the management of multiple accounts and identities can be very onerous and time consuming for the responsible administrator and therefore expensive for the organization. In order to meet these challenges, firms decide to invest in introducing an Identity and Access Management System (IAMS) that supports the organization by using policies to assign permissions to accounts, groups, and roles. In practice, since various versions of IAMSs exist, it is a challenging task to decide upon introduction of an IAMS. The following study proposes a first attempt of a decision support model for practitioners which considers four alternatives: Introduction of an IAMS with Role-based Access Control RBAC) or without and no introduction of IAMS again with or without RBAC. To underpin the practical applicability of the proposed model, we parametrize and operationalize it based on a real world use case using input from an expert interview.' author: - first_name: Eva full_name: Weishäupl, Eva last_name: Weishäupl - first_name: Michael full_name: Kunz, Michael last_name: Kunz - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Günther full_name: Pernul, Günther last_name: Pernul citation: ama: 'Weishäupl E, Kunz M, Yasasin E, et al. Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory. In: 2nd International Workshop on Security in Highly Connected IT Systems (SHCIS?15). ; 2015.' apa: Weishäupl, E., Kunz, M., Yasasin, E., Wagner, G., Prester, J., Schryen, G., & Pernul, G. (2015). Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory. In 2nd International Workshop on Security in highly connected IT Systems (SHCIS?15). bibtex: '@inproceedings{Weishäupl_Kunz_Yasasin_Wagner_Prester_Schryen_Pernul_2015, title={Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory}, booktitle={2nd International Workshop on Security in highly connected IT Systems (SHCIS?15)}, author={Weishäupl, Eva and Kunz, Michael and Yasasin, Emrah and Wagner, Gerit and Prester, Julian and Schryen, Guido and Pernul, Günther}, year={2015} }' chicago: Weishäupl, Eva, Michael Kunz, Emrah Yasasin, Gerit Wagner, Julian Prester, Guido Schryen, and Günther Pernul. “Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory.” In 2nd International Workshop on Security in Highly Connected IT Systems (SHCIS?15), 2015. ieee: E. Weishäupl et al., “Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory,” in 2nd International Workshop on Security in highly connected IT Systems (SHCIS?15), 2015. mla: Weishäupl, Eva, et al. “Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory.” 2nd International Workshop on Security in Highly Connected IT Systems (SHCIS?15), 2015. short: 'E. Weishäupl, M. Kunz, E. Yasasin, G. Wagner, J. Prester, G. Schryen, G. Pernul, in: 2nd International Workshop on Security in Highly Connected IT Systems (SHCIS?15), 2015.' date_created: 2018-11-14T11:27:20Z date_updated: 2022-01-06T07:02:04Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:46:28Z date_updated: 2018-12-13T15:09:54Z file_id: '6040' file_name: Towards an Economic Approach to IAMS.PDF file_size: 166015 relation: main_file file_date_updated: 2018-12-13T15:09:54Z has_accepted_license: '1' keyword: - Identity and Access Management - Economic Decision Making - Information Systems - Information Security Investment - Decision Theory language: - iso: eng oa: '1' publication: 2nd International Workshop on Security in highly connected IT Systems (SHCIS?15) status: public title: Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory type: conference user_id: '61579' year: '2015' ... --- _id: '5616' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Eva full_name: Weishäupl, Eva last_name: Weishäupl citation: ama: 'Schryen G, Weishäupl E. IT-Sicherheit: Ökonomisch Planen und Bewerten. Managementkompass. 2015;(2):17-18.' apa: 'Schryen, G., & Weishäupl, E. (2015). IT-Sicherheit: Ökonomisch Planen und Bewerten. Managementkompass, (2), 17–18.' bibtex: '@article{Schryen_Weishäupl_2015, title={IT-Sicherheit: Ökonomisch Planen und Bewerten}, number={2}, journal={Managementkompass}, publisher={Frankfurt Business Media, Der F.A.Z.-Fachverlag}, author={Schryen, Guido and Weishäupl, Eva}, year={2015}, pages={17–18} }' chicago: 'Schryen, Guido, and Eva Weishäupl. “IT-Sicherheit: Ökonomisch Planen Und Bewerten.” Managementkompass, no. 2 (2015): 17–18.' ieee: 'G. Schryen and E. Weishäupl, “IT-Sicherheit: Ökonomisch Planen und Bewerten,” Managementkompass, no. 2, pp. 17–18, 2015.' mla: 'Schryen, Guido, and Eva Weishäupl. “IT-Sicherheit: Ökonomisch Planen Und Bewerten.” Managementkompass, no. 2, Frankfurt Business Media, Der F.A.Z.-Fachverlag, 2015, pp. 17–18.' short: G. Schryen, E. Weishäupl, Managementkompass (2015) 17–18. date_created: 2018-11-14T13:59:53Z date_updated: 2022-01-06T07:02:09Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:46:04Z date_updated: 2018-12-13T15:09:42Z file_id: '6039' file_name: MK-DigitalSecurity-2015_Schryen.pdf file_size: 101976 relation: main_file file_date_updated: 2018-12-13T15:09:42Z has_accepted_license: '1' issue: '2' language: - iso: eng oa: '1' page: 17-18 publication: Managementkompass publisher: Frankfurt Business Media, Der F.A.Z.-Fachverlag status: public title: 'IT-Sicherheit: Ökonomisch Planen und Bewerten' type: journal_article user_id: '61579' year: '2015' ... --- _id: '5618' abstract: - lang: eng text: Literature reviews play an important role in the development of knowledge. Yet, we observe a lack of theoretical underpinning of and epistemological insights into how literature reviews can contribute to knowledge creation and have actually contributed in the IS discipline. To address these theoretical and empirical research gaps, we suggest a novel epistemological model of literature reviews. This model allows us to align different contributions of literature reviews with their underlying knowledge conversions - thereby building a bridge between the previously largely unconnected fields of literature reviews and epistemology. We evaluate the appropriateness of the model by conducting an empirical analysis of 173 IS literature reviews which were published in 39 pertinent IS journals between 2000 and 2014. Based on this analysis, we derive an epistemological taxonomy of IS literature reviews, which complements previously suggested typologies. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Gerit full_name: Wagner, Gerit last_name: Wagner - first_name: Alexander full_name: Benlian, Alexander last_name: Benlian citation: ama: 'Schryen G, Wagner G, Benlian A. Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature. In: International Conference on Information Systems (ICIS). ; 2015.' apa: 'Schryen, G., Wagner, G., & Benlian, A. (2015). Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature. In International Conference on Information Systems (ICIS).' bibtex: '@inproceedings{Schryen_Wagner_Benlian_2015, title={Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature}, booktitle={International Conference on Information Systems (ICIS)}, author={Schryen, Guido and Wagner, Gerit and Benlian, Alexander}, year={2015} }' chicago: 'Schryen, Guido, Gerit Wagner, and Alexander Benlian. “Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature.” In International Conference on Information Systems (ICIS), 2015.' ieee: 'G. Schryen, G. Wagner, and A. Benlian, “Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature,” in International Conference on Information Systems (ICIS), 2015.' mla: 'Schryen, Guido, et al. “Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature.” International Conference on Information Systems (ICIS), 2015.' short: 'G. Schryen, G. Wagner, A. Benlian, in: International Conference on Information Systems (ICIS), 2015.' date_created: 2018-11-14T14:01:13Z date_updated: 2022-01-06T07:02:10Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:44:48Z date_updated: 2018-12-13T15:09:22Z file_id: '6037' file_name: ICIS PROCEEDINGS PAPER - Literature Reviews.pdf file_size: 487102 relation: main_file file_date_updated: 2018-12-13T15:09:22Z has_accepted_license: '1' keyword: - Literature review - Research methods/methodology - Theory of knowledge language: - iso: eng oa: '1' publication: International Conference on Information Systems (ICIS) status: public title: 'Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature' type: conference user_id: '61579' year: '2015' ... --- _id: '5622' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Martina full_name: Comes, Martina last_name: Comes citation: ama: Schryen G, Rauchecker G, Comes M. Resource Planning in Disaster Response - Decision Support Models and Methodologies. Business & Information Systems Engineering (BISE). 2015;57(4):243-259. apa: Schryen, G., Rauchecker, G., & Comes, M. (2015). Resource Planning in Disaster Response - Decision Support Models and Methodologies. Business & Information Systems Engineering (BISE), 57(4), 243–259. bibtex: '@article{Schryen_Rauchecker_Comes_2015, title={Resource Planning in Disaster Response - Decision Support Models and Methodologies}, volume={57}, number={4}, journal={Business & Information Systems Engineering (BISE)}, publisher={Springer}, author={Schryen, Guido and Rauchecker, Gerhard and Comes, Martina}, year={2015}, pages={243–259} }' chicago: 'Schryen, Guido, Gerhard Rauchecker, and Martina Comes. “Resource Planning in Disaster Response - Decision Support Models and Methodologies.” Business & Information Systems Engineering (BISE) 57, no. 4 (2015): 243–59.' ieee: G. Schryen, G. Rauchecker, and M. Comes, “Resource Planning in Disaster Response - Decision Support Models and Methodologies,” Business & Information Systems Engineering (BISE), vol. 57, no. 4, pp. 243–259, 2015. mla: Schryen, Guido, et al. “Resource Planning in Disaster Response - Decision Support Models and Methodologies.” Business & Information Systems Engineering (BISE), vol. 57, no. 4, Springer, 2015, pp. 243–59. short: G. Schryen, G. Rauchecker, M. Comes, Business & Information Systems Engineering (BISE) 57 (2015) 243–259. date_created: 2018-11-14T14:07:25Z date_updated: 2022-01-06T07:02:12Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:42:18Z date_updated: 2018-12-13T15:08:39Z file_id: '6032' file_name: BISE Springer Paper.pdf file_size: 733154 relation: main_file file_date_updated: 2018-12-13T15:08:39Z has_accepted_license: '1' intvolume: ' 57' issue: '4' language: - iso: eng oa: '1' page: 243-259 publication: Business & Information Systems Engineering (BISE) publisher: Springer status: public title: Resource Planning in Disaster Response - Decision Support Models and Methodologies type: journal_article user_id: '61579' volume: 57 year: '2015' ... --- _id: '5634' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research. Communications of the AIS. 2015;37(Art 12):286-325. apa: Schryen, G. (2015). Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research. Communications of the AIS, 37(Art 12), 286–325. bibtex: '@article{Schryen_2015, title={Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research}, volume={37}, number={Art 12}, journal={Communications of the AIS}, publisher={Association for Information Systems (AIS); Association for Computing Machinery (ACM)}, author={Schryen, Guido}, year={2015}, pages={286–325} }' chicago: 'Schryen, Guido. “Writing Qualitative IS Literature Reviews ? Guidelines for Synthesis, Interpretation and Guidance of Research.” Communications of the AIS 37, no. Art 12 (2015): 286–325.' ieee: G. Schryen, “Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research,” Communications of the AIS, vol. 37, no. Art 12, pp. 286–325, 2015. mla: Schryen, Guido. “Writing Qualitative IS Literature Reviews ? Guidelines for Synthesis, Interpretation and Guidance of Research.” Communications of the AIS, vol. 37, no. Art 12, Association for Information Systems (AIS); Association for Computing Machinery (ACM), 2015, pp. 286–325. short: G. Schryen, Communications of the AIS 37 (2015) 286–325. date_created: 2018-11-14T14:26:59Z date_updated: 2022-01-06T07:02:15Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:46:54Z date_updated: 2018-12-13T15:10:32Z file_id: '6041' file_name: Writing Qualitative Is Literature Reviewsguidelines For Synthesis In.pdf file_size: 1048400 relation: main_file file_date_updated: 2018-12-13T15:10:32Z has_accepted_license: '1' intvolume: ' 37' issue: Art 12 language: - iso: eng oa: '1' page: 286-325 publication: Communications of the AIS publisher: Association for Information Systems (AIS); Association for Computing Machinery (ACM) status: public title: Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research type: journal_article user_id: '61579' volume: 37 year: '2015' ... --- _id: '5672' author: - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Rauchecker G, Yasasin E, Schryen G. A Decision Support System for IT Security Incident Management. In: 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS). ; 2014.' apa: Rauchecker, G., Yasasin, E., & Schryen, G. (2014). A Decision Support System for IT Security Incident Management. In 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS). bibtex: '@inproceedings{Rauchecker_Yasasin_Schryen_2014, title={A Decision Support System for IT Security Incident Management}, booktitle={11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS)}, author={Rauchecker, Gerhard and Yasasin, Emrah and Schryen, Guido}, year={2014} }' chicago: Rauchecker, Gerhard, Emrah Yasasin, and Guido Schryen. “A Decision Support System for IT Security Incident Management.” In 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS), 2014. ieee: G. Rauchecker, E. Yasasin, and G. Schryen, “A Decision Support System for IT Security Incident Management,” in 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS), 2014. mla: Rauchecker, Gerhard, et al. “A Decision Support System for IT Security Incident Management.” 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS), 2014. short: 'G. Rauchecker, E. Yasasin, G. Schryen, in: 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS), 2014.' date_created: 2018-11-14T15:07:47Z date_updated: 2022-01-06T07:02:27Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:51:37Z date_updated: 2018-12-13T15:11:29Z file_id: '6046' file_name: trustbus14_main.pdf file_size: 285288 relation: main_file file_date_updated: 2018-12-13T15:11:29Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS) status: public title: A Decision Support System for IT Security Incident Management type: conference user_id: '61579' year: '2014' ... --- _id: '5686' author: - first_name: Andreas full_name: Fink, Andreas last_name: Fink - first_name: Natalia full_name: Kliewer, Natalia last_name: Kliewer - first_name: Dirk full_name: Mattfeld, Dirk last_name: Mattfeld - first_name: Lars full_name: Mönch, Lars last_name: Mönch - first_name: Franz full_name: Rothlauf, Franz last_name: Rothlauf - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Leena full_name: Suhl, Leena last_name: Suhl - first_name: Stefan full_name: Voß, Stefan last_name: Voß citation: ama: Fink A, Kliewer N, Mattfeld D, et al. Model-based Decision Support in Manufacturing and Service Networks. Business & Information Systems Engineering (BISE). 2014;6(1):17-24. apa: Fink, A., Kliewer, N., Mattfeld, D., Mönch, L., Rothlauf, F., Schryen, G., … Voß, S. (2014). Model-based Decision Support in Manufacturing and Service Networks. Business & Information Systems Engineering (BISE), 6(1), 17–24. bibtex: '@article{Fink_Kliewer_Mattfeld_Mönch_Rothlauf_Schryen_Suhl_Voß_2014, title={Model-based Decision Support in Manufacturing and Service Networks}, volume={6}, number={1}, journal={Business & Information Systems Engineering (BISE)}, publisher={Gabler}, author={Fink, Andreas and Kliewer, Natalia and Mattfeld, Dirk and Mönch, Lars and Rothlauf, Franz and Schryen, Guido and Suhl, Leena and Voß, Stefan}, year={2014}, pages={17–24} }' chicago: 'Fink, Andreas, Natalia Kliewer, Dirk Mattfeld, Lars Mönch, Franz Rothlauf, Guido Schryen, Leena Suhl, and Stefan Voß. “Model-Based Decision Support in Manufacturing and Service Networks.” Business & Information Systems Engineering (BISE) 6, no. 1 (2014): 17–24.' ieee: A. Fink et al., “Model-based Decision Support in Manufacturing and Service Networks,” Business & Information Systems Engineering (BISE), vol. 6, no. 1, pp. 17–24, 2014. mla: Fink, Andreas, et al. “Model-Based Decision Support in Manufacturing and Service Networks.” Business & Information Systems Engineering (BISE), vol. 6, no. 1, Gabler, 2014, pp. 17–24. short: A. Fink, N. Kliewer, D. Mattfeld, L. Mönch, F. Rothlauf, G. Schryen, L. Suhl, S. Voß, Business & Information Systems Engineering (BISE) 6 (2014) 17–24. date_created: 2018-11-14T15:45:36Z date_updated: 2022-01-06T07:02:33Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:49:47Z date_updated: 2018-12-13T15:10:52Z file_id: '6043' file_name: Fink2014_Article_Model-BasedDecisionSupportInMa.pdf file_size: 447715 relation: main_file file_date_updated: 2018-12-13T15:10:52Z has_accepted_license: '1' intvolume: ' 6' issue: '1' language: - iso: eng oa: '1' page: 17-24 publication: Business & Information Systems Engineering (BISE) publisher: Gabler status: public title: Model-based Decision Support in Manufacturing and Service Networks type: journal_article user_id: '61579' volume: 6 year: '2014' ... --- _id: '5687' author: - first_name: Andreas full_name: Fink, Andreas last_name: Fink - first_name: Natalia full_name: Kliewer, Natalia last_name: Kliewer - first_name: Dirk full_name: Mattfeld, Dirk last_name: Mattfeld - first_name: Lars full_name: Mönch, Lars last_name: Mönch - first_name: Franz full_name: Rothlauf, Franz last_name: Rothlauf - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Lena full_name: Suhl, Lena last_name: Suhl - first_name: Stefan full_name: Voß, Stefan last_name: Voß citation: ama: Fink A, Kliewer N, Mattfeld D, et al. Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken. Wirtschaftsinformatik. 2014;56(1):21-29. apa: Fink, A., Kliewer, N., Mattfeld, D., Mönch, L., Rothlauf, F., Schryen, G., … Voß, S. (2014). Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken. Wirtschaftsinformatik, 56(1), 21–29. bibtex: '@article{Fink_Kliewer_Mattfeld_Mönch_Rothlauf_Schryen_Suhl_Voß_2014, title={Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken}, volume={56}, number={1}, journal={Wirtschaftsinformatik}, publisher={Gabler}, author={Fink, Andreas and Kliewer, Natalia and Mattfeld, Dirk and Mönch, Lars and Rothlauf, Franz and Schryen, Guido and Suhl, Lena and Voß, Stefan}, year={2014}, pages={21–29} }' chicago: 'Fink, Andreas, Natalia Kliewer, Dirk Mattfeld, Lars Mönch, Franz Rothlauf, Guido Schryen, Lena Suhl, and Stefan Voß. “Modellbasierte Entscheidungsunterstützung in Produktions- Und Service-Netzwerken.” Wirtschaftsinformatik 56, no. 1 (2014): 21–29.' ieee: A. Fink et al., “Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken,” Wirtschaftsinformatik, vol. 56, no. 1, pp. 21–29, 2014. mla: Fink, Andreas, et al. “Modellbasierte Entscheidungsunterstützung in Produktions- Und Service-Netzwerken.” Wirtschaftsinformatik, vol. 56, no. 1, Gabler, 2014, pp. 21–29. short: A. Fink, N. Kliewer, D. Mattfeld, L. Mönch, F. Rothlauf, G. Schryen, L. Suhl, S. Voß, Wirtschaftsinformatik 56 (2014) 21–29. date_created: 2018-11-14T15:46:29Z date_updated: 2022-01-06T07:02:33Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:27:31Z date_updated: 2018-12-13T15:13:24Z file_id: '6170' file_name: Fink2014_Article_ModellbasierteEntscheidungsunt.pdf file_size: 460098 relation: main_file file_date_updated: 2018-12-13T15:13:24Z has_accepted_license: '1' intvolume: ' 56' issue: '1' language: - iso: eng oa: '1' page: 21-29 publication: Wirtschaftsinformatik publisher: Gabler status: public title: Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken type: journal_article user_id: '61579' volume: 56 year: '2014' ... --- _id: '6197' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. The Epistemological Impact of Literature Reviews in Information Systems Research.; 2014. apa: Schryen, G. (2014). The Epistemological Impact of Literature Reviews in Information Systems Research. bibtex: '@book{Schryen_2014, title={The Epistemological Impact of Literature Reviews in Information Systems Research}, author={Schryen, Guido}, year={2014} }' chicago: Schryen, Guido. The Epistemological Impact of Literature Reviews in Information Systems Research, 2014. ieee: G. Schryen, The Epistemological Impact of Literature Reviews in Information Systems Research. 2014. mla: Schryen, Guido. The Epistemological Impact of Literature Reviews in Information Systems Research. 2014. short: G. Schryen, The Epistemological Impact of Literature Reviews in Information Systems Research, 2014. date_created: 2018-12-13T14:15:36Z date_updated: 2022-01-06T07:02:56Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-13T14:22:14Z date_updated: 2018-12-13T15:21:14Z file_id: '6198' file_name: Technical report UR - The Epistemological Impact of Literature Reviews in IS Research.pdf file_size: 413916 relation: main_file file_date_updated: 2018-12-13T15:21:14Z has_accepted_license: '1' language: - iso: eng oa: '1' status: public title: The Epistemological Impact of Literature Reviews in Information Systems Research type: report user_id: '61579' year: '2014' ... --- _id: '5573' author: - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin - first_name: Gerhard full_name: Rauchecker, Gerhard last_name: Rauchecker - first_name: Julian full_name: Prester, Julian last_name: Prester - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Yasasin E, Rauchecker G, Prester J, Schryen G. A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems. In: 1st Workshop on Security in Highly Connected IT Systems (SHCIS 14). ; 2014.' apa: Yasasin, E., Rauchecker, G., Prester, J., & Schryen, G. (2014). A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems. In 1st Workshop on Security in highly connected IT systems (SHCIS 14). bibtex: '@inproceedings{Yasasin_Rauchecker_Prester_Schryen_2014, title={A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems}, booktitle={1st Workshop on Security in highly connected IT systems (SHCIS 14)}, author={Yasasin, Emrah and Rauchecker, Gerhard and Prester, Julian and Schryen, Guido}, year={2014} }' chicago: Yasasin, Emrah, Gerhard Rauchecker, Julian Prester, and Guido Schryen. “A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems.” In 1st Workshop on Security in Highly Connected IT Systems (SHCIS 14), 2014. ieee: E. Yasasin, G. Rauchecker, J. Prester, and G. Schryen, “A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems,” in 1st Workshop on Security in highly connected IT systems (SHCIS 14), 2014. mla: Yasasin, Emrah, et al. “A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems.” 1st Workshop on Security in Highly Connected IT Systems (SHCIS 14), 2014. short: 'E. Yasasin, G. Rauchecker, J. Prester, G. Schryen, in: 1st Workshop on Security in Highly Connected IT Systems (SHCIS 14), 2014.' date_created: 2018-11-14T11:12:40Z date_updated: 2022-01-06T07:01:59Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:27:01Z date_updated: 2018-12-13T15:13:12Z file_id: '6169' file_name: bare_conf.pdf file_size: 314617 relation: main_file file_date_updated: 2018-12-13T15:13:12Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 1st Workshop on Security in highly connected IT systems (SHCIS 14) status: public title: A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems type: conference user_id: '61579' year: '2014' ... --- _id: '5585' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Stefan full_name: Feuerriegel, Stefan last_name: Feuerriegel - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Wex F, Schryen G, Feuerriegel S, Neumann D. Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units. European Journal of Operational Research. 2014.' apa: 'Wex, F., Schryen, G., Feuerriegel, S., & Neumann, D. (2014). Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units. European Journal of Operational Research.' bibtex: '@article{Wex_Schryen_Feuerriegel_Neumann_2014, title={Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units}, journal={European Journal of Operational Research}, publisher={Elsevier}, author={Wex, Felix and Schryen, Guido and Feuerriegel, Stefan and Neumann, Dirk}, year={2014} }' chicago: 'Wex, Felix, Guido Schryen, Stefan Feuerriegel, and Dirk Neumann. “Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units.” European Journal of Operational Research, 2014.' ieee: 'F. Wex, G. Schryen, S. Feuerriegel, and D. Neumann, “Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units,” European Journal of Operational Research, 2014.' mla: 'Wex, Felix, et al. “Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units.” European Journal of Operational Research, Elsevier, 2014.' short: F. Wex, G. Schryen, S. Feuerriegel, D. Neumann, European Journal of Operational Research (2014). date_created: 2018-11-14T11:23:26Z date_updated: 2022-01-06T07:02:02Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:47:45Z date_updated: 2018-12-13T15:10:43Z file_id: '6042' file_name: 1-s2.0-S0377221713008527-main.pdf file_size: 1386151 relation: main_file file_date_updated: 2018-12-13T15:10:43Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: European Journal of Operational Research publisher: Elsevier status: public title: 'Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units' type: journal_article user_id: '61579' year: '2014' ... --- _id: '5614' abstract: - lang: eng text: Natural disasters, including earthquakes, Tsunamis, floods, hurricanes, and volcanic eruptions, have caused tremendous harm and continue to threaten millions of humans and various infrastructure capabilities each year. In their efforts to take countermeasures against the threats posed by future natural disasters, the United Nations formulated the ?Hyogo Framework for Action?, which aims at assessing and reducing risk. This framework and a global review of disaster reduction initiatives of the United Nations acknowledge the need for information systems research contributions in addressing major challenges of natural disaster management. In this paper, we provide a review of the literature with regard to how information systems research has addressed risk assessment and reduction in natural disaster management. Based on the review we identify research gaps that are centered around the need for acquiring general knowledge on how to design IS artifacts for risk assessment and reduction. In order to close these gaps in further research, we develop a research agenda that follows the IS design science paradigm. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Felix full_name: Wex, Felix last_name: Wex citation: ama: 'Schryen G, Wex F. Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda. International Journal of Information Systems for Crisis Response and Management (IJISCRAM). 2014;6(1).' apa: 'Schryen, G., & Wex, F. (2014). Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda. International Journal of Information Systems for Crisis Response and Management (IJISCRAM), 6(1).' bibtex: '@article{Schryen_Wex_2014, title={Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda}, volume={6}, number={1}, journal={International Journal of Information Systems for Crisis Response and Management (IJISCRAM)}, author={Schryen, Guido and Wex, Felix}, year={2014} }' chicago: 'Schryen, Guido, and Felix Wex. “Risk Reduction in Natural Disaster Management Through Information Systems: A Literature Review and an IS Design Science Research Agenda.” International Journal of Information Systems for Crisis Response and Management (IJISCRAM) 6, no. 1 (2014).' ieee: 'G. Schryen and F. Wex, “Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda,” International Journal of Information Systems for Crisis Response and Management (IJISCRAM), vol. 6, no. 1, 2014.' mla: 'Schryen, Guido, and Felix Wex. “Risk Reduction in Natural Disaster Management Through Information Systems: A Literature Review and an IS Design Science Research Agenda.” International Journal of Information Systems for Crisis Response and Management (IJISCRAM), vol. 6, no. 1, 2014.' short: G. Schryen, F. Wex, International Journal of Information Systems for Crisis Response and Management (IJISCRAM) 6 (2014). date_created: 2018-11-14T13:58:50Z date_updated: 2022-01-06T07:02:08Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:50:26Z date_updated: 2018-12-13T15:11:05Z file_id: '6044' file_name: Risk reduction in NDM - Revision 1.pdf file_size: 2708161 relation: main_file file_date_updated: 2018-12-13T15:11:05Z has_accepted_license: '1' intvolume: ' 6' issue: '1' keyword: - Natural Disaster Management - Risk Reduction - Hyogo Framework - IS Design Science - Literature review language: - iso: eng oa: '1' publication: International Journal of Information Systems for Crisis Response and Management (IJISCRAM) status: public title: 'Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda' type: journal_article user_id: '61579' volume: 6 year: '2014' ... --- _id: '5627' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Diana full_name: Hristova, Diana last_name: Hristova citation: ama: 'Schryen G, Hristova D. Duality in fuzzy linear programming: A survey. OR -Spectrum. 2014;37(1):1-48.' apa: 'Schryen, G., & Hristova, D. (2014). Duality in fuzzy linear programming: A survey. OR -Spectrum, 37(1), 1–48.' bibtex: '@article{Schryen_Hristova_2014, title={Duality in fuzzy linear programming: A survey}, volume={37}, number={1}, journal={OR -Spectrum}, publisher={Springer}, author={Schryen, Guido and Hristova, Diana}, year={2014}, pages={1–48} }' chicago: 'Schryen, Guido, and Diana Hristova. “Duality in Fuzzy Linear Programming: A Survey.” OR -Spectrum 37, no. 1 (2014): 1–48.' ieee: 'G. Schryen and D. Hristova, “Duality in fuzzy linear programming: A survey,” OR -Spectrum, vol. 37, no. 1, pp. 1–48, 2014.' mla: 'Schryen, Guido, and Diana Hristova. “Duality in Fuzzy Linear Programming: A Survey.” OR -Spectrum, vol. 37, no. 1, Springer, 2014, pp. 1–48.' short: G. Schryen, D. Hristova, OR -Spectrum 37 (2014) 1–48. date_created: 2018-11-14T14:18:28Z date_updated: 2022-01-06T07:02:13Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:53:04Z date_updated: 2018-12-13T15:11:40Z file_id: '6047' file_name: art_10.1007_s00291-013-0355-2(1).pdf file_size: 569417 relation: main_file file_date_updated: 2018-12-13T15:11:40Z has_accepted_license: '1' intvolume: ' 37' issue: '1' language: - iso: eng oa: '1' page: 1-48 publication: OR -Spectrum publisher: Springer status: public title: 'Duality in fuzzy linear programming: A survey' type: journal_article user_id: '61579' volume: 37 year: '2014' ... --- _id: '5636' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research. Communications of the AIS. 2014. apa: Schryen, G. (2014). Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research. Communications of the AIS. bibtex: '@article{Schryen_2014, title={Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research}, journal={Communications of the AIS}, author={Schryen, Guido}, year={2014} }' chicago: Schryen, Guido. “Writing Qualitative IS Literature Reviews ? Guidelines for Synthesis, Interpretation and Guidance of Research.” Communications of the AIS, 2014. ieee: G. Schryen, “Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research,” Communications of the AIS, 2014. mla: Schryen, Guido. “Writing Qualitative IS Literature Reviews ? Guidelines for Synthesis, Interpretation and Guidance of Research.” Communications of the AIS, 2014. short: G. Schryen, Communications of the AIS (2014). date_created: 2018-11-14T14:31:02Z date_updated: 2022-01-06T07:02:15Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:50:50Z date_updated: 2018-12-13T15:11:19Z file_id: '6045' file_name: Technical report UR - Writing IS literature reviews.pdf file_size: 1568470 relation: main_file file_date_updated: 2018-12-13T15:11:19Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Communications of the AIS status: public title: Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research type: journal_article user_id: '61579' year: '2014' ... --- _id: '5682' author: - first_name: Hermann full_name: de Meer, Hermann last_name: de Meer - first_name: Michael full_name: Diener, Michael last_name: Diener - first_name: Ralph full_name: Herkenhöner, Ralph last_name: Herkenhöner - first_name: Markus full_name: Kucera, Markus last_name: Kucera - first_name: Michael full_name: Niedermeier, Michael last_name: Niedermeier - first_name: Andreas full_name: Reisser, Andreas last_name: Reisser - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Michael full_name: Vetter, Michael last_name: Vetter - first_name: Thomas full_name: Waas, Thomas last_name: Waas - first_name: Emrah full_name: Yasasin, Emrah last_name: Yasasin citation: ama: de Meer H, Diener M, Herkenhöner R, et al. Sicherheitsherausforderungen in hochverteilten Systemen. PIK - Praxis der Informationsverarbeitung und Kommunikation. 2013;36(3):153-159. apa: de Meer, H., Diener, M., Herkenhöner, R., Kucera, M., Niedermeier, M., Reisser, A., … Yasasin, E. (2013). Sicherheitsherausforderungen in hochverteilten Systemen. PIK - Praxis Der Informationsverarbeitung Und Kommunikation, 36(3), 153–159. bibtex: '@article{de Meer_Diener_Herkenhöner_Kucera_Niedermeier_Reisser_Schryen_Vetter_Waas_Yasasin_2013, title={Sicherheitsherausforderungen in hochverteilten Systemen}, volume={36}, number={3}, journal={PIK - Praxis der Informationsverarbeitung und Kommunikation}, publisher={de Gruyter}, author={de Meer, Hermann and Diener, Michael and Herkenhöner, Ralph and Kucera, Markus and Niedermeier, Michael and Reisser, Andreas and Schryen, Guido and Vetter, Michael and Waas, Thomas and Yasasin, Emrah}, year={2013}, pages={153–159} }' chicago: 'Meer, Hermann de, Michael Diener, Ralph Herkenhöner, Markus Kucera, Michael Niedermeier, Andreas Reisser, Guido Schryen, Michael Vetter, Thomas Waas, and Emrah Yasasin. “Sicherheitsherausforderungen in Hochverteilten Systemen.” PIK - Praxis Der Informationsverarbeitung Und Kommunikation 36, no. 3 (2013): 153–59.' ieee: H. de Meer et al., “Sicherheitsherausforderungen in hochverteilten Systemen,” PIK - Praxis der Informationsverarbeitung und Kommunikation, vol. 36, no. 3, pp. 153–159, 2013. mla: de Meer, Hermann, et al. “Sicherheitsherausforderungen in Hochverteilten Systemen.” PIK - Praxis Der Informationsverarbeitung Und Kommunikation, vol. 36, no. 3, de Gruyter, 2013, pp. 153–59. short: H. de Meer, M. Diener, R. Herkenhöner, M. Kucera, M. Niedermeier, A. Reisser, G. Schryen, M. Vetter, T. Waas, E. Yasasin, PIK - Praxis Der Informationsverarbeitung Und Kommunikation 36 (2013) 153–159. date_created: 2018-11-14T15:43:13Z date_updated: 2022-01-06T07:02:32Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T12:01:06Z date_updated: 2018-12-13T15:12:17Z file_id: '6050' file_name: pik-2013-0015.pdf file_size: 203924 relation: main_file file_date_updated: 2018-12-13T15:12:17Z has_accepted_license: '1' intvolume: ' 36' issue: '3' language: - iso: eng oa: '1' page: 153-159 publication: PIK - Praxis der Informationsverarbeitung und Kommunikation publisher: de Gruyter status: public title: Sicherheitsherausforderungen in hochverteilten Systemen type: journal_article user_id: '61579' volume: 36 year: '2013' ... --- _id: '6166' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Wex F, Schryen G. Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung. Blick in die Wissenschaft. 2013;(28):27-32. apa: Wex, F., & Schryen, G. (2013). Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung. Blick in Die Wissenschaft, (28), 27–32. bibtex: '@article{Wex_Schryen_2013, title={Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung}, number={28}, journal={Blick in die Wissenschaft}, author={Wex, Felix and Schryen, Guido}, year={2013}, pages={27–32} }' chicago: 'Wex, Felix, and Guido Schryen. “Effektiver Einsatz von Rettungskräften Bei Naturkatastrophen - Modelle Und Verfahren Zur Entscheidungsunterstützung.” Blick in Die Wissenschaft, no. 28 (2013): 27–32.' ieee: F. Wex and G. Schryen, “Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung,” Blick in die Wissenschaft, no. 28, pp. 27–32, 2013. mla: Wex, Felix, and Guido Schryen. “Effektiver Einsatz von Rettungskräften Bei Naturkatastrophen - Modelle Und Verfahren Zur Entscheidungsunterstützung.” Blick in Die Wissenschaft, no. 28, 2013, pp. 27–32. short: F. Wex, G. Schryen, Blick in Die Wissenschaft (2013) 27–32. date_created: 2018-12-11T13:43:18Z date_updated: 2022-01-06T07:02:55Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T13:44:17Z date_updated: 2018-12-13T15:20:50Z file_id: '6167' file_name: Schreyen_Wex.pdf file_size: 835076 relation: main_file file_date_updated: 2018-12-13T15:20:50Z has_accepted_license: '1' issue: '28' language: - iso: eng oa: '1' page: 27-32 publication: Blick in die Wissenschaft status: public title: Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung type: journal_article user_id: '61579' year: '2013' ... --- _id: '5575' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: Wex F, Schryen G, Neumann D. Assignments of Collaborative Rescue Units during Emergency Response. International Journal of Information Systems for Crisis Response and Management. 2013;5(4):63-80. apa: Wex, F., Schryen, G., & Neumann, D. (2013). Assignments of Collaborative Rescue Units during Emergency Response. International Journal of Information Systems for Crisis Response and Management, 5(4), 63–80. bibtex: '@article{Wex_Schryen_Neumann_2013, title={Assignments of Collaborative Rescue Units during Emergency Response}, volume={5}, number={4}, journal={International Journal of Information Systems for Crisis Response and Management}, publisher={IGI Publ.}, author={Wex, Felix and Schryen, Guido and Neumann, Dirk}, year={2013}, pages={63–80} }' chicago: 'Wex, Felix, Guido Schryen, and Dirk Neumann. “Assignments of Collaborative Rescue Units during Emergency Response.” International Journal of Information Systems for Crisis Response and Management 5, no. 4 (2013): 63–80.' ieee: F. Wex, G. Schryen, and D. Neumann, “Assignments of Collaborative Rescue Units during Emergency Response,” International Journal of Information Systems for Crisis Response and Management, vol. 5, no. 4, pp. 63–80, 2013. mla: Wex, Felix, et al. “Assignments of Collaborative Rescue Units during Emergency Response.” International Journal of Information Systems for Crisis Response and Management, vol. 5, no. 4, IGI Publ., 2013, pp. 63–80. short: F. Wex, G. Schryen, D. Neumann, International Journal of Information Systems for Crisis Response and Management 5 (2013) 63–80. date_created: 2018-11-14T11:14:07Z date_updated: 2022-01-06T07:02:00Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:25:51Z date_updated: 2018-12-13T15:13:02Z file_id: '6168' file_name: ERS_IJISCRAM2013_Revision 1.pdf file_size: 493113 relation: main_file file_date_updated: 2018-12-13T15:13:02Z has_accepted_license: '1' intvolume: ' 5' issue: '4' language: - iso: eng oa: '1' page: 63-80 publication: International Journal of Information Systems for Crisis Response and Management publisher: IGI Publ. status: public title: Assignments of Collaborative Rescue Units during Emergency Response type: journal_article user_id: '61579' volume: 5 year: '2013' ... --- _id: '5576' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Wex F, Schryen G, Neumann D. Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response. In: Proceedings of the 46th Hawaii International Conference on System Science. ; 2013.' apa: Wex, F., Schryen, G., & Neumann, D. (2013). Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response. In Proceedings of the 46th Hawaii International Conference on System Science. bibtex: '@inproceedings{Wex_Schryen_Neumann_2013, title={Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response}, booktitle={Proceedings of the 46th Hawaii International Conference on System Science}, author={Wex, Felix and Schryen, Guido and Neumann, Dirk}, year={2013} }' chicago: Wex, Felix, Guido Schryen, and Dirk Neumann. “Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response.” In Proceedings of the 46th Hawaii International Conference on System Science, 2013. ieee: F. Wex, G. Schryen, and D. Neumann, “Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response,” in Proceedings of the 46th Hawaii International Conference on System Science, 2013. mla: Wex, Felix, et al. “Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response.” Proceedings of the 46th Hawaii International Conference on System Science, 2013. short: 'F. Wex, G. Schryen, D. Neumann, in: Proceedings of the 46th Hawaii International Conference on System Science, 2013.' date_created: 2018-11-14T11:14:56Z date_updated: 2022-01-06T07:02:00Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T12:00:30Z date_updated: 2018-12-13T15:12:05Z file_id: '6049' file_name: ERS_HICSS2013_revised_v11-ACM [number].pdf file_size: 394101 relation: main_file file_date_updated: 2018-12-13T15:12:05Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Proceedings of the 46th Hawaii International Conference on System Science status: public title: Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response type: conference user_id: '61579' year: '2013' ... --- _id: '5637' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there. European Journal of Information Systems (EJIS). 2013;22(2):139-169.' apa: 'Schryen, G. (2013). Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there. European Journal of Information Systems (EJIS), 22(2), 139–169.' bibtex: '@article{Schryen_2013, title={Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there}, volume={22}, number={2}, journal={European Journal of Information Systems (EJIS)}, author={Schryen, Guido}, year={2013}, pages={139–169} }' chicago: 'Schryen, Guido. “Revisiting IS Business Value Research: What We Already Know, What We Still Need to Know, and How We Can Get There.” European Journal of Information Systems (EJIS) 22, no. 2 (2013): 139–69.' ieee: 'G. Schryen, “Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there,” European Journal of Information Systems (EJIS), vol. 22, no. 2, pp. 139–169, 2013.' mla: 'Schryen, Guido. “Revisiting IS Business Value Research: What We Already Know, What We Still Need to Know, and How We Can Get There.” European Journal of Information Systems (EJIS), vol. 22, no. 2, 2013, pp. 139–69.' short: G. Schryen, European Journal of Information Systems (EJIS) 22 (2013) 139–169. date_created: 2018-11-14T14:31:37Z date_updated: 2022-01-06T07:02:16Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-07T11:59:54Z date_updated: 2018-12-13T15:11:53Z file_id: '6048' file_name: EJIS-PAPER.pdf file_size: 792102 relation: main_file file_date_updated: 2018-12-13T15:11:53Z has_accepted_license: '1' intvolume: ' 22' issue: '2' language: - iso: eng oa: '1' page: 139-169 publication: European Journal of Information Systems (EJIS) status: public title: 'Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there' type: journal_article user_id: '61579' volume: 22 year: '2013' ... --- _id: '5680' author: - first_name: Tim full_name: Püschel, Tim last_name: Püschel - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Diana full_name: Hristova, Diana last_name: Hristova - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Püschel T, Schryen G, Hristova D, Neumann D. Cloud Service Revenue Management. In: European Conference on Information Systems. ; 2012.' apa: Püschel, T., Schryen, G., Hristova, D., & Neumann, D. (2012). Cloud Service Revenue Management. In European Conference on Information Systems. bibtex: '@inproceedings{Püschel_Schryen_Hristova_Neumann_2012, title={Cloud Service Revenue Management}, booktitle={European Conference on Information Systems}, author={Püschel, Tim and Schryen, Guido and Hristova, Diana and Neumann, Dirk}, year={2012} }' chicago: Püschel, Tim, Guido Schryen, Diana Hristova, and Dirk Neumann. “Cloud Service Revenue Management.” In European Conference on Information Systems, 2012. ieee: T. Püschel, G. Schryen, D. Hristova, and D. Neumann, “Cloud Service Revenue Management,” in European Conference on Information Systems, 2012. mla: Püschel, Tim, et al. “Cloud Service Revenue Management.” European Conference on Information Systems, 2012. short: 'T. Püschel, G. Schryen, D. Hristova, D. Neumann, in: European Conference on Information Systems, 2012.' date_created: 2018-11-14T15:40:59Z date_updated: 2022-01-06T07:02:31Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:00:25Z date_updated: 2018-12-13T15:14:33Z file_id: '6177' file_name: Proceedings version.pdf file_size: 476955 relation: main_file file_date_updated: 2018-12-13T15:14:33Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: European Conference on Information Systems status: public title: Cloud Service Revenue Management type: conference user_id: '61579' year: '2012' ... --- _id: '5683' author: - first_name: Fabian full_name: Lang, Fabian last_name: Lang - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Andreas full_name: Fink, Andreas last_name: Fink citation: ama: 'Lang F, Schryen G, Fink A. Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study. In: International Conference on Information Systems. ; 2012.' apa: 'Lang, F., Schryen, G., & Fink, A. (2012). Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study. In International Conference on Information Systems.' bibtex: '@inproceedings{Lang_Schryen_Fink_2012, title={Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study}, booktitle={International Conference on Information Systems}, author={Lang, Fabian and Schryen, Guido and Fink, Andreas}, year={2012} }' chicago: 'Lang, Fabian, Guido Schryen, and Andreas Fink. “Elicitating, Modeling, and Processing Uncertain Human Preferences for Software Agents in Electronic Negotiations: An Empirical Study.” In International Conference on Information Systems, 2012.' ieee: 'F. Lang, G. Schryen, and A. Fink, “Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study,” in International Conference on Information Systems, 2012.' mla: 'Lang, Fabian, et al. “Elicitating, Modeling, and Processing Uncertain Human Preferences for Software Agents in Electronic Negotiations: An Empirical Study.” International Conference on Information Systems, 2012.' short: 'F. Lang, G. Schryen, A. Fink, in: International Conference on Information Systems, 2012.' date_created: 2018-11-14T15:44:07Z date_updated: 2022-01-06T07:02:32Z department: - _id: '277' extern: '1' language: - iso: eng publication: International Conference on Information Systems status: public title: 'Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study' type: conference user_id: '61579' year: '2012' ... --- _id: '5688' author: - first_name: Christian full_name: Bodenstein, Christian last_name: Bodenstein - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Bodenstein C, Schryen G, Neumann D. Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers. European Journal of Operational Research : EJOR. 2012;222(1):157-167.' apa: 'Bodenstein, C., Schryen, G., & Neumann, D. (2012). Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers. European Journal of Operational Research : EJOR, 222(1), 157–167.' bibtex: '@article{Bodenstein_Schryen_Neumann_2012, title={Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers}, volume={222}, number={1}, journal={European Journal of Operational Research : EJOR}, publisher={Elsevier}, author={Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}, year={2012}, pages={157–167} }' chicago: 'Bodenstein, Christian, Guido Schryen, and Dirk Neumann. “Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers.” European Journal of Operational Research : EJOR 222, no. 1 (2012): 157–67.' ieee: 'C. Bodenstein, G. Schryen, and D. Neumann, “Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers,” European Journal of Operational Research : EJOR, vol. 222, no. 1, pp. 157–167, 2012.' mla: 'Bodenstein, Christian, et al. “Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers.” European Journal of Operational Research : EJOR, vol. 222, no. 1, Elsevier, 2012, pp. 157–67.' short: 'C. Bodenstein, G. Schryen, D. Neumann, European Journal of Operational Research : EJOR 222 (2012) 157–167.' date_created: 2018-11-14T15:47:32Z date_updated: 2022-01-06T07:02:33Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:54:18Z date_updated: 2018-12-13T15:13:35Z file_id: '6172' file_name: 1-s2.0-S0377221712002810-main.pdf file_size: 520239 relation: main_file file_date_updated: 2018-12-13T15:13:35Z has_accepted_license: '1' intvolume: ' 222' issue: '1' language: - iso: eng oa: '1' page: 157-167 publication: 'European Journal of Operational Research : EJOR' publisher: Elsevier status: public title: Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers type: journal_article user_id: '61579' volume: 222 year: '2012' ... --- _id: '5578' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: Wex F, Schryen G, Neumann D. A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty. International Journal of Information Systems for Crisis Response and Management. 2012;4(3):23-41. apa: Wex, F., Schryen, G., & Neumann, D. (2012). A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty. International Journal of Information Systems for Crisis Response and Management, 4(3), 23–41. bibtex: '@article{Wex_Schryen_Neumann_2012, title={A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty}, volume={4}, number={3}, journal={International Journal of Information Systems for Crisis Response and Management}, publisher={IGI Publ.}, author={Wex, Felix and Schryen, Guido and Neumann, Dirk}, year={2012}, pages={23–41} }' chicago: 'Wex, Felix, Guido Schryen, and Dirk Neumann. “A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty.” International Journal of Information Systems for Crisis Response and Management 4, no. 3 (2012): 23–41.' ieee: F. Wex, G. Schryen, and D. Neumann, “A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty,” International Journal of Information Systems for Crisis Response and Management, vol. 4, no. 3, pp. 23–41, 2012. mla: Wex, Felix, et al. “A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty.” International Journal of Information Systems for Crisis Response and Management, vol. 4, no. 3, IGI Publ., 2012, pp. 23–41. short: F. Wex, G. Schryen, D. Neumann, International Journal of Information Systems for Crisis Response and Management 4 (2012) 23–41. date_created: 2018-11-14T11:16:03Z date_updated: 2022-01-06T07:02:00Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:01:01Z date_updated: 2018-12-13T15:14:45Z file_id: '6178' file_name: Revision - Wex et al.pdf file_size: 377121 relation: main_file file_date_updated: 2018-12-13T15:14:45Z has_accepted_license: '1' intvolume: ' 4' issue: '3' language: - iso: eng oa: '1' page: 23-41 publication: International Journal of Information Systems for Crisis Response and Management publisher: IGI Publ. status: public title: A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty type: journal_article user_id: '61579' volume: 4 year: '2012' ... --- _id: '5579' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Wex F, Schryen G, Neumann D. Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units. In: International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012. ; 2012.' apa: 'Wex, F., Schryen, G., & Neumann, D. (2012). Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units. In International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012.' bibtex: '@inproceedings{Wex_Schryen_Neumann_2012, title={Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units}, booktitle={International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012}, author={Wex, Felix and Schryen, Guido and Neumann, Dirk}, year={2012} }' chicago: 'Wex, Felix, Guido Schryen, and Dirk Neumann. “Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units.” In International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012, 2012.' ieee: 'F. Wex, G. Schryen, and D. Neumann, “Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units,” in International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012, 2012.' mla: 'Wex, Felix, et al. “Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units.” International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012, 2012.' short: 'F. Wex, G. Schryen, D. Neumann, in: International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012, 2012.' date_created: 2018-11-14T11:16:58Z date_updated: 2022-01-06T07:02:01Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:59:44Z date_updated: 2018-12-13T15:14:20Z file_id: '6176' file_name: Proceedings version - 152.pdf file_size: 614029 relation: main_file file_date_updated: 2018-12-13T15:14:20Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012 status: public title: 'Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units' type: conference user_id: '61579' year: '2012' ... --- _id: '5615' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Felix full_name: Wex, Felix last_name: Wex citation: ama: 'Schryen G, Wex F. IS Design Thinking in Disaster Management Research. In: 45th Hawaii International Conference on System Sciences. ; 2012.' apa: Schryen, G., & Wex, F. (2012). IS Design Thinking in Disaster Management Research. In 45th Hawaii International Conference on System Sciences. bibtex: '@inproceedings{Schryen_Wex_2012, title={IS Design Thinking in Disaster Management Research}, booktitle={45th Hawaii International Conference on System Sciences}, author={Schryen, Guido and Wex, Felix}, year={2012} }' chicago: Schryen, Guido, and Felix Wex. “IS Design Thinking in Disaster Management Research.” In 45th Hawaii International Conference on System Sciences, 2012. ieee: G. Schryen and F. Wex, “IS Design Thinking in Disaster Management Research,” in 45th Hawaii International Conference on System Sciences, 2012. mla: Schryen, Guido, and Felix Wex. “IS Design Thinking in Disaster Management Research.” 45th Hawaii International Conference on System Sciences, 2012. short: 'G. Schryen, F. Wex, in: 45th Hawaii International Conference on System Sciences, 2012.' date_created: 2018-11-14T13:59:23Z date_updated: 2022-01-06T07:02:08Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:58:56Z date_updated: 2018-12-13T15:14:09Z file_id: '6175' file_name: PID2061325.pdf file_size: 207629 relation: main_file file_date_updated: 2018-12-13T15:14:09Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 45th Hawaii International Conference on System Sciences status: public title: IS Design Thinking in Disaster Management Research type: conference user_id: '61579' year: '2012' ... --- _id: '5638' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012). Die Zeit. 2012.' apa: 'Schryen, G. (2012). Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012). Die Zeit.' bibtex: '@article{Schryen_2012, title={Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012)}, journal={Die Zeit}, author={Schryen, Guido}, year={2012} }' chicago: 'Schryen, Guido. “Profis Im Netz: Soziale Netzwerke Könnten in Unternehmen Viel Mehr Nutzen Stiften - Woran Hakt Es?, In: Die Zeit (12.04.2012).” Die Zeit, 2012.' ieee: 'G. Schryen, “Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012),” Die Zeit, 2012.' mla: 'Schryen, Guido. “Profis Im Netz: Soziale Netzwerke Könnten in Unternehmen Viel Mehr Nutzen Stiften - Woran Hakt Es?, In: Die Zeit (12.04.2012).” Die Zeit, 2012.' short: G. Schryen, Die Zeit (2012). date_created: 2018-11-14T14:32:11Z date_updated: 2022-01-06T07:02:16Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:01:42Z date_updated: 2018-12-13T15:15:22Z file_id: '6179' file_name: Zeit_Artikel_16_4_2012.pdf file_size: 260775 relation: main_file file_date_updated: 2018-12-13T15:15:22Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Die Zeit status: public title: 'Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012)' type: journal_article user_id: '61579' year: '2012' ... --- _id: '5639' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear. IM Information Management & Consulting. 2012.' apa: 'Schryen, G. (2012). Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear. IM Information Management & Consulting.' bibtex: '@article{Schryen_2012, title={Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear}, journal={IM Information Management & Consulting}, publisher={Information Multimedia Communication imc}, author={Schryen, Guido}, year={2012} }' chicago: 'Schryen, Guido. “Soziale Netzwerke in Unternehmenskontexten - Potentiale Und Anforderungen, in: Information Management & Consulting, to Appear.” IM Information Management & Consulting, 2012.' ieee: 'G. Schryen, “Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear,” IM Information Management & Consulting, 2012.' mla: 'Schryen, Guido. “Soziale Netzwerke in Unternehmenskontexten - Potentiale Und Anforderungen, in: Information Management & Consulting, to Appear.” IM Information Management & Consulting, Information Multimedia Communication imc, 2012.' short: G. Schryen, IM Information Management & Consulting (2012). date_created: 2018-11-14T14:33:39Z date_updated: 2022-01-06T07:02:17Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:58:26Z date_updated: 2018-12-13T15:13:58Z file_id: '6174' file_name: IM-Artikel.pdf file_size: 467370 relation: main_file file_date_updated: 2018-12-13T15:13:58Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: IM Information Management & Consulting publisher: Information Multimedia Communication imc status: public title: 'Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear' type: journal_article user_id: '61579' year: '2012' ... --- _id: '5684' author: - first_name: Fabian full_name: Lang, Fabian last_name: Lang - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Andreas full_name: Fink, Andreas last_name: Fink citation: ama: 'Lang F, Schryen G, Fink A. Automated Negotiations Under Uncertain Preferences. In: Proceedings of the 2011 International Conference on Information Systems (ICIS 2011). ; 2011.' apa: Lang, F., Schryen, G., & Fink, A. (2011). Automated Negotiations Under Uncertain Preferences. In Proceedings of the 2011 International Conference on Information Systems (ICIS 2011). bibtex: '@inproceedings{Lang_Schryen_Fink_2011, title={Automated Negotiations Under Uncertain Preferences}, booktitle={Proceedings of the 2011 International Conference on Information Systems (ICIS 2011)}, author={Lang, Fabian and Schryen, Guido and Fink, Andreas}, year={2011} }' chicago: Lang, Fabian, Guido Schryen, and Andreas Fink. “Automated Negotiations Under Uncertain Preferences.” In Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), 2011. ieee: F. Lang, G. Schryen, and A. Fink, “Automated Negotiations Under Uncertain Preferences,” in Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), 2011. mla: Lang, Fabian, et al. “Automated Negotiations Under Uncertain Preferences.” Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), 2011. short: 'F. Lang, G. Schryen, A. Fink, in: Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), 2011.' date_created: 2018-11-14T15:44:41Z date_updated: 2022-01-06T07:02:32Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T14:57:26Z date_updated: 2018-12-13T15:13:46Z file_id: '6173' file_name: ICIS PROCEEDINGS VERSION.pdf file_size: 606840 relation: main_file file_date_updated: 2018-12-13T15:13:46Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Proceedings of the 2011 International Conference on Information Systems (ICIS 2011) status: public title: Automated Negotiations Under Uncertain Preferences type: conference user_id: '61579' year: '2011' ... --- _id: '5689' author: - first_name: Christian full_name: Bodenstein, Christian last_name: Bodenstein - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Bodenstein C, Schryen G, Neumann D. Reducing Datacenter Energy Usage through Efficient Job Allocation. In: Proceedings of the 19th European Conference on Information Systems (ECIS 2011). ; 2011.' apa: Bodenstein, C., Schryen, G., & Neumann, D. (2011). Reducing Datacenter Energy Usage through Efficient Job Allocation. In Proceedings of the 19th European Conference on Information Systems (ECIS 2011). bibtex: '@inproceedings{Bodenstein_Schryen_Neumann_2011, title={Reducing Datacenter Energy Usage through Efficient Job Allocation}, booktitle={Proceedings of the 19th European Conference on Information Systems (ECIS 2011)}, author={Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}, year={2011} }' chicago: Bodenstein, Christian, Guido Schryen, and Dirk Neumann. “Reducing Datacenter Energy Usage through Efficient Job Allocation.” In Proceedings of the 19th European Conference on Information Systems (ECIS 2011), 2011. ieee: C. Bodenstein, G. Schryen, and D. Neumann, “Reducing Datacenter Energy Usage through Efficient Job Allocation,” in Proceedings of the 19th European Conference on Information Systems (ECIS 2011), 2011. mla: Bodenstein, Christian, et al. “Reducing Datacenter Energy Usage through Efficient Job Allocation.” Proceedings of the 19th European Conference on Information Systems (ECIS 2011), 2011. short: 'C. Bodenstein, G. Schryen, D. Neumann, in: Proceedings of the 19th European Conference on Information Systems (ECIS 2011), 2011.' date_created: 2018-11-14T15:48:00Z date_updated: 2022-01-06T07:02:34Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:04:23Z date_updated: 2018-12-13T15:15:52Z file_id: '6182' file_name: ECIS_2011_-_REDUCING_DATACENTER_ENERGY_USAGE_THROUGH_EFFICIENT_JOB_ALLOCATION.pdf file_size: 210256 relation: main_file file_date_updated: 2018-12-13T15:15:52Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Proceedings of the 19th European Conference on Information Systems (ECIS 2011) status: public title: Reducing Datacenter Energy Usage through Efficient Job Allocation type: conference user_id: '61579' year: '2011' ... --- _id: '5581' author: - first_name: Felix full_name: Wex, Felix last_name: Wex - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Wex F, Schryen G, Neumann D. Intelligent Decision Support for Centralized Coordination during Emergency Response. In: Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011). ; 2011.' apa: Wex, F., Schryen, G., & Neumann, D. (2011). Intelligent Decision Support for Centralized Coordination during Emergency Response. In Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011). bibtex: '@inproceedings{Wex_Schryen_Neumann_2011, title={Intelligent Decision Support for Centralized Coordination during Emergency Response}, booktitle={Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011)}, author={Wex, Felix and Schryen, Guido and Neumann, Dirk}, year={2011} }' chicago: Wex, Felix, Guido Schryen, and Dirk Neumann. “Intelligent Decision Support for Centralized Coordination during Emergency Response.” In Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), 2011. ieee: F. Wex, G. Schryen, and D. Neumann, “Intelligent Decision Support for Centralized Coordination during Emergency Response,” in Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), 2011. mla: Wex, Felix, et al. “Intelligent Decision Support for Centralized Coordination during Emergency Response.” Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), 2011. short: 'F. Wex, G. Schryen, D. Neumann, in: Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), 2011.' date_created: 2018-11-14T11:17:44Z date_updated: 2022-01-06T07:02:02Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:03:15Z date_updated: 2018-12-13T15:15:31Z file_id: '6180' file_name: 131.pdf file_size: 286447 relation: main_file file_date_updated: 2018-12-13T15:15:31Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011) status: public title: Intelligent Decision Support for Centralized Coordination during Emergency Response type: conference user_id: '61579' year: '2011' ... --- _id: '5619' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Melanie full_name: Volkamer, Melanie last_name: Volkamer - first_name: Sebastian full_name: Ries, Sebastian last_name: Ries citation: ama: 'Schryen G, Volkamer M, Ries S. A formal approach towards measuring trust in distributed systems. In: Proceedings of the 26th Annual ACM Symposium on Applied Computing. ; 2011.' apa: Schryen, G., Volkamer, M., & Ries, S. (2011). A formal approach towards measuring trust in distributed systems. In Proceedings of the 26th Annual ACM Symposium on Applied Computing. bibtex: '@inproceedings{Schryen_Volkamer_Ries_2011, title={A formal approach towards measuring trust in distributed systems}, booktitle={Proceedings of the 26th Annual ACM Symposium on Applied Computing}, author={Schryen, Guido and Volkamer, Melanie and Ries, Sebastian}, year={2011} }' chicago: Schryen, Guido, Melanie Volkamer, and Sebastian Ries. “A Formal Approach towards Measuring Trust in Distributed Systems.” In Proceedings of the 26th Annual ACM Symposium on Applied Computing, 2011. ieee: G. Schryen, M. Volkamer, and S. Ries, “A formal approach towards measuring trust in distributed systems,” in Proceedings of the 26th Annual ACM Symposium on Applied Computing, 2011. mla: Schryen, Guido, et al. “A Formal Approach towards Measuring Trust in Distributed Systems.” Proceedings of the 26th Annual ACM Symposium on Applied Computing, 2011. short: 'G. Schryen, M. Volkamer, S. Ries, in: Proceedings of the 26th Annual ACM Symposium on Applied Computing, 2011.' date_created: 2018-11-14T14:01:37Z date_updated: 2022-01-06T07:02:10Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:06:53Z date_updated: 2018-12-13T15:16:04Z file_id: '6183' file_name: p1739-schryen.pdf file_size: 453557 relation: main_file file_date_updated: 2018-12-13T15:16:04Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Proceedings of the 26th Annual ACM Symposium on Applied Computing status: public title: A formal approach towards measuring trust in distributed systems type: conference user_id: '61579' year: '2011' ... --- _id: '5640' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Is open source security a myth? What do vulnerability and patch data say? Communications of the ACM (CACM). 2011;Vol. 54(No. 5):130-139. apa: Schryen, G. (2011). Is open source security a myth? What do vulnerability and patch data say? Communications of the ACM (CACM), Vol. 54(No. 5), 130–139. bibtex: '@article{Schryen_2011, title={Is open source security a myth? What do vulnerability and patch data say?}, volume={Vol. 54}, number={No. 5}, journal={Communications of the ACM (CACM)}, publisher={Association for Computing Machinery}, author={Schryen, Guido}, year={2011}, pages={130–139} }' chicago: 'Schryen, Guido. “Is Open Source Security a Myth? What Do Vulnerability and Patch Data Say?” Communications of the ACM (CACM) Vol. 54, no. No. 5 (2011): 130–39.' ieee: G. Schryen, “Is open source security a myth? What do vulnerability and patch data say?,” Communications of the ACM (CACM), vol. Vol. 54, no. No. 5, pp. 130–139, 2011. mla: Schryen, Guido. “Is Open Source Security a Myth? What Do Vulnerability and Patch Data Say?” Communications of the ACM (CACM), vol. Vol. 54, no. No. 5, Association for Computing Machinery, 2011, pp. 130–39. short: G. Schryen, Communications of the ACM (CACM) Vol. 54 (2011) 130–139. date_created: 2018-11-14T14:34:54Z date_updated: 2022-01-06T07:02:17Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:03:56Z date_updated: 2018-12-13T15:15:42Z file_id: '6181' file_name: CACM article.pdf file_size: 1020040 relation: main_file file_date_updated: 2018-12-13T15:15:42Z has_accepted_license: '1' issue: No. 5 language: - iso: eng oa: '1' page: 130-139 publication: Communications of the ACM (CACM) publisher: Association for Computing Machinery status: public title: Is open source security a myth? What do vulnerability and patch data say? type: journal_article user_id: '61579' volume: Vol. 54 year: '2011' ... --- _id: '5641' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation. In: IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki. ; 2011.' apa: Schryen, G. (2011). Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation. In IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki. bibtex: '@inproceedings{Schryen_2011, title={Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation}, booktitle={IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki}, author={Schryen, Guido}, year={2011} }' chicago: Schryen, Guido. “Seeking the VALUE in IS Business Value Research - An Agenda for Investigating Synergies Between Socio-Organizational Change, IS Capabilities Change, and IS Innovation.” In IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki, 2011. ieee: G. Schryen, “Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation,” in IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki, 2011. mla: Schryen, Guido. “Seeking the VALUE in IS Business Value Research - An Agenda for Investigating Synergies Between Socio-Organizational Change, IS Capabilities Change, and IS Innovation.” IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki, 2011. short: 'G. Schryen, in: IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki, 2011.' date_created: 2018-11-14T14:35:30Z date_updated: 2022-01-06T07:02:18Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:07:46Z date_updated: 2018-12-13T15:16:26Z file_id: '6184' file_name: REVISION - Seeking the value in IS value research.pdf file_size: 291468 relation: main_file file_date_updated: 2018-12-13T15:16:26Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki status: public title: Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation type: conference user_id: '61579' year: '2011' ... --- _id: '5685' abstract: - lang: eng text: In double-sided markets for computing resources an optimal allocation schedule among job offers and requests subject to relevant capacity constraints can be determined. With increasing storage demands and emerging storage services the question how to schedule storage jobs becomes more and more interesting. Since such scheduling problems are often in the class NP-complete an exact computation is not feasible in practice. On the other hand an approximation to the optimal solution can easily be found by means of using heuristics. The problem with this attempt is that the suggested solution may not be exactly optimal and is thus less satisfying. Considering the two above mentioned solution approaches one can clearly find a trade-off between the optimality of the solution and the efficiency to get to a solution at all. This work proposes to apply and combine heuristics in optimization to gain from both of their benefits while reducing the problematic aspects. Following this method it is assumed to get closer to the optimal solution in a shorter time compared to a full optimization. author: - first_name: Josef full_name: Finkbeiner, Josef last_name: Finkbeiner - first_name: Christian full_name: Bodenstein, Christian last_name: Bodenstein - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Finkbeiner J, Bodenstein C, Schryen G, Neumann D. Applying heuristic methods for job scheduling in storage markets. In: 18th European Conference on Information Systems (ECIS 2010). ; 2010.' apa: Finkbeiner, J., Bodenstein, C., Schryen, G., & Neumann, D. (2010). Applying heuristic methods for job scheduling in storage markets. In 18th European Conference on Information Systems (ECIS 2010). bibtex: '@inproceedings{Finkbeiner_Bodenstein_Schryen_Neumann_2010, title={Applying heuristic methods for job scheduling in storage markets}, booktitle={18th European Conference on Information Systems (ECIS 2010)}, author={Finkbeiner, Josef and Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}, year={2010} }' chicago: Finkbeiner, Josef, Christian Bodenstein, Guido Schryen, and Dirk Neumann. “Applying Heuristic Methods for Job Scheduling in Storage Markets.” In 18th European Conference on Information Systems (ECIS 2010), 2010. ieee: J. Finkbeiner, C. Bodenstein, G. Schryen, and D. Neumann, “Applying heuristic methods for job scheduling in storage markets,” in 18th European Conference on Information Systems (ECIS 2010), 2010. mla: Finkbeiner, Josef, et al. “Applying Heuristic Methods for Job Scheduling in Storage Markets.” 18th European Conference on Information Systems (ECIS 2010), 2010. short: 'J. Finkbeiner, C. Bodenstein, G. Schryen, D. Neumann, in: 18th European Conference on Information Systems (ECIS 2010), 2010.' date_created: 2018-11-14T15:45:11Z date_updated: 2022-01-06T07:02:32Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:21:06Z date_updated: 2018-12-13T15:19:40Z file_id: '6188' file_name: s1-ln7055316-1881058806-1939656818Hwf-1884822883IdV-5442784107055316PDF_HI0001.pdf file_size: 171336 relation: main_file file_date_updated: 2018-12-13T15:19:40Z has_accepted_license: '1' keyword: - Decision Support System - Algorithms - Optimization - Market Engineering language: - iso: eng oa: '1' publication: 18th European Conference on Information Systems (ECIS 2010) status: public title: Applying heuristic methods for job scheduling in storage markets type: conference user_id: '61579' year: '2010' ... --- _id: '5690' abstract: - lang: eng text: In a world, where more and more businesses seem to trade in an online market, the supply of online services to supply the ever-growing demand could quickly reach its capacity limits. Online service providers may find themselves maxed out at peak operation levels during high-traffic timeslots but too little demand during low-traffic timeslots, although the latter is becoming less frequent. At this point not only deciding which user is allocated what level of service becomes essential, but also the magnitude of the service provided, can be controlled by pricing. Pricing is an important factor when efficient and acceptable allocation of resources between individuals must be reached. Without prices, transferring or sharing goods would be impossible. In sharing information, pricing a product however is not as simple as relatively pricing an apple or a pear. Often the costs, and hence the prices are simply unknown. Backed by this scenario, the online services market could be combined with the market design mechanism of diamonds. For this we propose an ultimatum pricing strategy which effectively allows for valuations to be accounted for, but no longer a necessity when pricing in grid, cloud or other online computing environments. author: - first_name: Christian full_name: Bodenstein, Christian last_name: Bodenstein - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Dirk full_name: Neumann, Dirk last_name: Neumann citation: ama: 'Bodenstein C, Schryen G, Neumann D. From “Take-it-or-leave-it” offers to “Take-it-or-be-left-out” Ultimatum - A trade mechanism for Online Services. In: 18th European Conference on Information Systems (ECIS 2010). ; 2010.' apa: Bodenstein, C., Schryen, G., & Neumann, D. (2010). From “Take-it-or-leave-it” offers to “Take-it-or-be-left-out” Ultimatum - A trade mechanism for Online Services. In 18th European Conference on Information Systems (ECIS 2010). bibtex: '@inproceedings{Bodenstein_Schryen_Neumann_2010, title={From “Take-it-or-leave-it” offers to “Take-it-or-be-left-out” Ultimatum - A trade mechanism for Online Services}, booktitle={18th European Conference on Information Systems (ECIS 2010)}, author={Bodenstein, Christian and Schryen, Guido and Neumann, Dirk}, year={2010} }' chicago: Bodenstein, Christian, Guido Schryen, and Dirk Neumann. “From ‘Take-It-or-Leave-It’ Offers to ‘Take-It-or-Be-Left-out’ Ultimatum - A Trade Mechanism for Online Services.” In 18th European Conference on Information Systems (ECIS 2010), 2010. ieee: C. Bodenstein, G. Schryen, and D. Neumann, “From ‘Take-it-or-leave-it’ offers to ‘Take-it-or-be-left-out’ Ultimatum - A trade mechanism for Online Services,” in 18th European Conference on Information Systems (ECIS 2010), 2010. mla: Bodenstein, Christian, et al. “From ‘Take-It-or-Leave-It’ Offers to ‘Take-It-or-Be-Left-out’ Ultimatum - A Trade Mechanism for Online Services.” 18th European Conference on Information Systems (ECIS 2010), 2010. short: 'C. Bodenstein, G. Schryen, D. Neumann, in: 18th European Conference on Information Systems (ECIS 2010), 2010.' date_created: 2018-11-14T15:48:39Z date_updated: 2022-01-06T07:02:34Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:22:41Z date_updated: 2018-12-13T15:20:13Z file_id: '6191' file_name: Take it or leave it - ECIS - Proof.pdf file_size: 247621 relation: main_file file_date_updated: 2018-12-13T15:20:13Z has_accepted_license: '1' keyword: - Posted Price - Ultimatum Game - Energy Efficiency - Mechanism Design language: - iso: eng oa: '1' publication: 18th European Conference on Information Systems (ECIS 2010) status: public title: From "Take-it-or-leave-it" offers to "Take-it-or-be-left-out" Ultimatum - A trade mechanism for Online Services type: conference user_id: '61579' year: '2010' ... --- _id: '5598' abstract: - lang: eng text: Emerging digital environments and infrastructures, such as distributed services and computing services, have generated new options of communication, information sharing, and resource utilization in past years. Different distributed trust concepts are applied to increase trust in such systems. However, these concepts yield to rather complex architectures which make it difficult to determine which component or system needs to be trusted. This paper presents a novel trust measurement method for distributed systems which enables the t identification of weak points in the overall system architecture. The measurement method includes the specification of a formal trust language and its representation by means of propositional logic formulas. The applicability of the proposed concepts is demonstrated by conducting a case study on the Internet voting system that was used in the 2007 parliamentary elections in Estonia. author: - first_name: Melanie full_name: Volkamer, Melanie last_name: Volkamer - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Volkamer M, Schryen G. Measuring eTrust in distributed systems - General Concept and Application to Internet Voting. In: Proceedings of the 23rd Bled EConference. ; 2010.' apa: Volkamer, M., & Schryen, G. (2010). Measuring eTrust in distributed systems - General Concept and Application to Internet Voting. In Proceedings of the 23rd Bled eConference. bibtex: '@inproceedings{Volkamer_Schryen_2010, title={Measuring eTrust in distributed systems - General Concept and Application to Internet Voting}, booktitle={Proceedings of the 23rd Bled eConference}, author={Volkamer, Melanie and Schryen, Guido}, year={2010} }' chicago: Volkamer, Melanie, and Guido Schryen. “Measuring ETrust in Distributed Systems - General Concept and Application to Internet Voting.” In Proceedings of the 23rd Bled EConference, 2010. ieee: M. Volkamer and G. Schryen, “Measuring eTrust in distributed systems - General Concept and Application to Internet Voting,” in Proceedings of the 23rd Bled eConference, 2010. mla: Volkamer, Melanie, and Guido Schryen. “Measuring ETrust in Distributed Systems - General Concept and Application to Internet Voting.” Proceedings of the 23rd Bled EConference, 2010. short: 'M. Volkamer, G. Schryen, in: Proceedings of the 23rd Bled EConference, 2010.' date_created: 2018-11-14T11:49:50Z date_updated: 2022-01-06T07:02:06Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:14:05Z date_updated: 2018-12-13T15:16:50Z file_id: '6185' file_name: 06_Schryen.pdf file_size: 243413 relation: main_file file_date_updated: 2018-12-13T15:16:50Z has_accepted_license: '1' keyword: - distributed trust concepts - measuring etrust - Internet voting language: - iso: eng oa: '1' publication: Proceedings of the 23rd Bled eConference status: public title: Measuring eTrust in distributed systems - General Concept and Application to Internet Voting type: conference user_id: '61579' year: '2010' ... --- _id: '5631' abstract: - lang: eng text: While many theoretical arguments against or in favor of open source and closed source software development have been presented, the empirical basis for the assessment of arguments and the development of models is still weak. Addressing this research gap, this paper presents the first comprehensive empirical investigation of published vulnerabilities and patches of 17 widely deployed open source and closed source software packages, including operating systems, database systems, web browsers, email clients, and office systems. The empirical analysis uses comprehensive vulnerability data contained in the NIST National Vulnerability Database and a newly compiled data set of vulnerability patches. The results suggest that it is not the particular software development style that determines the severity of vulnerabilities and vendors? patching behavior, but rather the specific application type and the policy of the particular development community, respectively. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Rich full_name: Eliot, Rich last_name: Eliot citation: ama: 'Schryen G, Eliot R. Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question. In: 43rd Annual Hawaii International Conference on System Sciences. ; 2010.' apa: Schryen, G., & Eliot, R. (2010). Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question. In 43rd Annual Hawaii International Conference on System Sciences. bibtex: '@inproceedings{Schryen_Eliot_2010, title={Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question}, booktitle={43rd Annual Hawaii International Conference on System Sciences}, author={Schryen, Guido and Eliot, Rich}, year={2010} }' chicago: Schryen, Guido, and Rich Eliot. “Increasing Software Security through Open Source or Closed Source Development? Empirics Suggest That We Have Asked the Wrong Question.” In 43rd Annual Hawaii International Conference on System Sciences, 2010. ieee: G. Schryen and R. Eliot, “Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question,” in 43rd Annual Hawaii International Conference on System Sciences, 2010. mla: Schryen, Guido, and Rich Eliot. “Increasing Software Security through Open Source or Closed Source Development? Empirics Suggest That We Have Asked the Wrong Question.” 43rd Annual Hawaii International Conference on System Sciences, 2010. short: 'G. Schryen, R. Eliot, in: 43rd Annual Hawaii International Conference on System Sciences, 2010.' date_created: 2018-11-14T14:23:45Z date_updated: 2022-01-06T07:02:14Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:23:33Z date_updated: 2018-12-13T15:20:23Z file_id: '6192' file_name: vendors behavior - UPDATED IEEE version.pdf file_size: 299380 relation: main_file file_date_updated: 2018-12-13T15:20:23Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 43rd Annual Hawaii International Conference on System Sciences status: public title: Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question type: conference user_id: '61579' year: '2010' ... --- _id: '5632' abstract: - lang: eng text: 'Enduring doubts about the value of IS investments reveal that IS researchers have not fully managed to identify and to explain the economic benefits of IS. Three research tasks are essential requisites on the path towards addressing this criticism: the synthesis of knowledge, the identification of lack of knowledge, and the proposition of paths for closing knowledge gaps. This paper considers each of these tasks by a) synthesizing key research findings based on a comprehensive literature review, b) identifying and unfolding key limitations of current research, and c) applying a decision-theoretic perspective, which opens new horizons to IS business value research and shows paths for overcoming the limitations. The adoption of this perspective results in a decision-theoretic foundation of IS business value research and includes the proposition of a consistent terminology and a research model that frames further research.' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Christian full_name: Bodenstein, Christian last_name: Bodenstein citation: ama: 'Schryen G, Bodenstein C. A decision-theoretic foundation of IS business value research. In: Proceedings of the 18th European Conference on Information Systems (ECIS 2010). ; 2010.' apa: Schryen, G., & Bodenstein, C. (2010). A decision-theoretic foundation of IS business value research. In Proceedings of the 18th European Conference on Information Systems (ECIS 2010). bibtex: '@inproceedings{Schryen_Bodenstein_2010, title={A decision-theoretic foundation of IS business value research}, booktitle={Proceedings of the 18th European Conference on Information Systems (ECIS 2010)}, author={Schryen, Guido and Bodenstein, Christian}, year={2010} }' chicago: Schryen, Guido, and Christian Bodenstein. “A Decision-Theoretic Foundation of IS Business Value Research.” In Proceedings of the 18th European Conference on Information Systems (ECIS 2010), 2010. ieee: G. Schryen and C. Bodenstein, “A decision-theoretic foundation of IS business value research,” in Proceedings of the 18th European Conference on Information Systems (ECIS 2010), 2010. mla: Schryen, Guido, and Christian Bodenstein. “A Decision-Theoretic Foundation of IS Business Value Research.” Proceedings of the 18th European Conference on Information Systems (ECIS 2010), 2010. short: 'G. Schryen, C. Bodenstein, in: Proceedings of the 18th European Conference on Information Systems (ECIS 2010), 2010.' date_created: 2018-11-14T14:24:25Z date_updated: 2022-01-06T07:02:14Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:24:22Z date_updated: 2018-12-13T15:20:37Z file_id: '6193' file_name: IS business value - ECIS - Final Version.pdf file_size: 174368 relation: main_file file_date_updated: 2018-12-13T15:20:37Z has_accepted_license: '1' keyword: - Decision theory - IT value - IS assessment - IS evaluation language: - iso: eng oa: '1' publication: Proceedings of the 18th European Conference on Information Systems (ECIS 2010) status: public title: A decision-theoretic foundation of IS business value research type: conference user_id: '61579' year: '2010' ... --- _id: '5642' abstract: - lang: eng text: This paper presents a fuzzy set based decision support model for taking uncertainty into account when making security investment decisions for distributed systems. The proposed model is complementary to robabilistic approaches and useful in situations where probabilistic information is either unavailable or not appropriate to reliably predict future conditions. We ?rst present the speci?cation of a formal security language that allows to specify under which conditions a distributed system is protected against security violations. We show that each term of the security language can be transformed into an equivalent propositional logic term. Then we use propositional logic terms to de?ne a fuzzy set based decision model. This optimization model incorporates uncertainty with regard to the impact of investments on the achieved security levels of components of the distributed system. The model also accounts for budget and security constraints, in order to be applicable in practice. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. A Fuzzy Model for IT Security Investments. In: C. Freiling F, ed. Sicherheit 2010 : Sicherheit, Schutz Und Zuverl{\"a}ssigkeit ; Konferenzband Der 5. Jahrestagung Des Fachbereichs Sicherheit Der Gesellschaft F{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin. Vol 170. GI-Edition: lecture notes in informatics. Proceedings. Bonn: Gesellschaft für Informatik; 2010:289-304.' apa: 'Schryen, G. (2010). A Fuzzy Model for IT Security Investments. In F. C. Freiling (Ed.), Sicherheit 2010 : Sicherheit, Schutz und Zuverl{\"a}ssigkeit ; Konferenzband der 5. Jahrestagung des Fachbereichs Sicherheit der Gesellschaft f{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin (Vol. 170, pp. 289–304). Bonn: Gesellschaft für Informatik.' bibtex: '@inproceedings{Schryen_2010, place={Bonn}, series={GI-Edition: lecture notes in informatics. Proceedings}, title={A Fuzzy Model for IT Security Investments}, volume={170}, booktitle={Sicherheit 2010 : Sicherheit, Schutz und Zuverl{\"a}ssigkeit ; Konferenzband der 5. Jahrestagung des Fachbereichs Sicherheit der Gesellschaft f{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin}, publisher={Gesellschaft für Informatik}, author={Schryen, Guido}, editor={C. Freiling, FelixEditor}, year={2010}, pages={289–304}, collection={GI-Edition: lecture notes in informatics. Proceedings} }' chicago: 'Schryen, Guido. “A Fuzzy Model for IT Security Investments.” In Sicherheit 2010 : Sicherheit, Schutz Und Zuverl{\"a}ssigkeit ; Konferenzband Der 5. Jahrestagung Des Fachbereichs Sicherheit Der Gesellschaft F{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin, edited by Felix C. Freiling, 170:289–304. GI-Edition: Lecture Notes in Informatics. Proceedings. Bonn: Gesellschaft für Informatik, 2010.' ieee: 'G. Schryen, “A Fuzzy Model for IT Security Investments,” in Sicherheit 2010 : Sicherheit, Schutz und Zuverl{\"a}ssigkeit ; Konferenzband der 5. Jahrestagung des Fachbereichs Sicherheit der Gesellschaft f{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin, 2010, vol. 170, pp. 289–304.' mla: 'Schryen, Guido. “A Fuzzy Model for IT Security Investments.” Sicherheit 2010 : Sicherheit, Schutz Und Zuverl{\"a}ssigkeit ; Konferenzband Der 5. Jahrestagung Des Fachbereichs Sicherheit Der Gesellschaft F{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin, edited by Felix C. Freiling, vol. 170, Gesellschaft für Informatik, 2010, pp. 289–304.' short: 'G. Schryen, in: F. C. Freiling (Ed.), Sicherheit 2010 : Sicherheit, Schutz Und Zuverl{\"a}ssigkeit ; Konferenzband Der 5. Jahrestagung Des Fachbereichs Sicherheit Der Gesellschaft F{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin, Gesellschaft für Informatik, Bonn, 2010, pp. 289–304.' date_created: 2018-11-14T14:35:59Z date_updated: 2022-01-06T07:02:18Z ddc: - '000' department: - _id: '277' editor: - first_name: Felix full_name: C. Freiling, Felix last_name: C. Freiling extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:22:12Z date_updated: 2018-12-13T15:20:03Z file_id: '6190' file_name: security_fuzzy_LNI Version.pdf file_size: 372660 relation: main_file file_date_updated: 2018-12-13T15:20:03Z has_accepted_license: '1' intvolume: ' 170' language: - iso: eng oa: '1' page: 289-304 place: Bonn publication: 'Sicherheit 2010 : Sicherheit, Schutz und Zuverl{\"a}ssigkeit ; Konferenzband der 5. Jahrestagung des Fachbereichs Sicherheit der Gesellschaft f{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin' publisher: Gesellschaft für Informatik series_title: 'GI-Edition: lecture notes in informatics. Proceedings' status: public title: A Fuzzy Model for IT Security Investments type: conference user_id: '61579' volume: 170 year: '2010' ... --- _id: '5643' abstract: - lang: eng text: Enduring doubts about the value of IS investments reveal that IS researchers have not fully managed to identify and to explain the economic benefits of IS. This paper assumes that literature reviews, which represent a powerful instrument for the identification and synthesis of knowledge, have not tapped their full potential to address this issue due to deficiencies in methodology. The analysis of 18 literature reviews published in pertinent academic outlets during the past 20 years shows such deficiencies. Two of the most critical weaknesses identified are (1) the lack of theory use in most reviews and (2) a weak linkage of reviews, resulting in little progress in theory and framework development. The systematic identification of these weaknesses and the extraction of promising methodological examples from past literature are the main contributions of this work, which supports the composition of more effective literature reviews in future research. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness. In: Proceedings of the First Scandinavian Conference on Information Systems (SCIS). ; 2010.' apa: 'Schryen, G. (2010). An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness. In Proceedings of the First Scandinavian Conference on Information Systems (SCIS).' bibtex: '@inproceedings{Schryen_2010, title={An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness}, booktitle={Proceedings of the First Scandinavian Conference on Information Systems (SCIS)}, author={Schryen, Guido}, year={2010} }' chicago: 'Schryen, Guido. “An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness.” In Proceedings of the First Scandinavian Conference on Information Systems (SCIS), 2010.' ieee: 'G. Schryen, “An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness,” in Proceedings of the First Scandinavian Conference on Information Systems (SCIS), 2010.' mla: 'Schryen, Guido. “An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness.” Proceedings of the First Scandinavian Conference on Information Systems (SCIS), 2010.' short: 'G. Schryen, in: Proceedings of the First Scandinavian Conference on Information Systems (SCIS), 2010.' date_created: 2018-11-14T14:36:26Z date_updated: 2022-01-06T07:02:18Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:14:51Z date_updated: 2018-12-13T15:17:00Z file_id: '6186' file_name: 2010_Book_ScandinavianInformationSystems - Schryen.pdf file_size: 302340 relation: main_file file_date_updated: 2018-12-13T15:17:00Z has_accepted_license: '1' keyword: - Literature review - Business value - Information systems - Methodology - Theory language: - iso: eng oa: '1' publication: Proceedings of the First Scandinavian Conference on Information Systems (SCIS) status: public title: 'An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness' type: conference user_id: '61579' year: '2010' ... --- _id: '5644' abstract: - lang: eng text: The economic relevance of information systems has been studied for many years and has attracted an abundance of research papers. However, the ?productivity paradoxon? of the 90s, Carr?s widely recognized paper ?IT doesn?t matter?, and several studies that do not find a positive correlation between IS investments and economic performance reveal long-lasting difficulties for IS researchers to explain ?IS business value?. Business executives and researchers also continue to question the value of IS investments. This raises the question of whether literature reviews have tapped their potential to address the concerns by covering key research areas of IS business value and preserving their key findings. In order to address this question, this paper identifies and describes 12 key research areas, and synthesizes what literature reviews published in pertinent academic outlets have done to preserve knowledge. The analysis of 22 literature reviews shows that some crucial areas have not been (sufficiently) covered. They provide fertile areas for future literature reviews. As this work is based on the results of more than 200 research papers, it is capable of drawing a comprehensive picture of the current state-of-the-art in IS business value research. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Preserving knowledge on IS business value: what literature reviews have done. Business \& Information Systems Engineering (BISE). 2010;52(4):225-237.' apa: 'Schryen, G. (2010). Preserving knowledge on IS business value: what literature reviews have done. Business \& Information Systems Engineering (BISE), 52(4), 225–237.' bibtex: '@article{Schryen_2010, title={Preserving knowledge on IS business value: what literature reviews have done}, volume={52}, number={4}, journal={Business \& Information Systems Engineering (BISE)}, publisher={Springer}, author={Schryen, Guido}, year={2010}, pages={225–237} }' chicago: 'Schryen, Guido. “Preserving Knowledge on IS Business Value: What Literature Reviews Have Done.” Business \& Information Systems Engineering (BISE) 52, no. 4 (2010): 225–37.' ieee: 'G. Schryen, “Preserving knowledge on IS business value: what literature reviews have done,” Business \& Information Systems Engineering (BISE), vol. 52, no. 4, pp. 225–237, 2010.' mla: 'Schryen, Guido. “Preserving Knowledge on IS Business Value: What Literature Reviews Have Done.” Business \& Information Systems Engineering (BISE), vol. 52, no. 4, Springer, 2010, pp. 225–37.' short: G. Schryen, Business \& Information Systems Engineering (BISE) 52 (2010) 225–237. date_created: 2018-11-14T14:38:02Z date_updated: 2022-01-06T07:02:19Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:19:37Z date_updated: 2018-12-13T15:17:12Z file_id: '6187' file_name: BISE-PreservingknowledgeonISbusinessvalue-Manuscript-1.pdf file_size: 525443 relation: main_file file_date_updated: 2018-12-13T15:17:12Z has_accepted_license: '1' intvolume: ' 52' issue: '4' keyword: - Business value - Information systems - Literature review - Meta review language: - iso: eng oa: '1' page: 225-237 publication: Business \& Information Systems Engineering (BISE) publisher: Springer status: public title: 'Preserving knowledge on IS business value: what literature reviews have done' type: journal_article user_id: '61579' volume: 52 year: '2010' ... --- _id: '5645' abstract: - lang: eng text: The economic relevance of information systems has been studied for many years and has attracted an abundance of research papers. However, the ?productivity paradoxon? of the 1990s, Carr?s widely recognized paper ?IT doesn?t matter?, and several studies that do not find a positive correlation between IS investments and economic performance reveal long-lasting difficulties for IS researchers to explain ?IS business value?. Business executives and researchers also continue to question the value of IS investments. This raises the question of whether literature reviews have tapped their potential to address the concerns by covering key research areas of IS business value and preserving their key findings. In order to address this question, this paper identifies and describes 12 key research areas, and synthesizes what literature reviews published in pertinent academic outlets have done to preserve knowledge. The analysis of 22 literature reviews shows that some crucial areas have not been (sufficiently) covered. They provide fertile areas for future literature reviews. As this work is based on the results of more than 200 research papers, it is capable of drawing a comprehensive picture of the current state-of-the-art in IS business value research. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done). Wirtschaftsinformatik. 2010;52(4):225-237. apa: Schryen, G. (2010). Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done). Wirtschaftsinformatik, 52(4), 225–237. bibtex: '@article{Schryen_2010, title={Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done)}, volume={52}, number={4}, journal={Wirtschaftsinformatik}, publisher={Gabler; Springer}, author={Schryen, Guido}, year={2010}, pages={225–237} }' chicago: 'Schryen, Guido. “Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews Zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done).” Wirtschaftsinformatik 52, no. 4 (2010): 225–37.' ieee: G. Schryen, “Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done),” Wirtschaftsinformatik, vol. 52, no. 4, pp. 225–237, 2010. mla: Schryen, Guido. “Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews Zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done).” Wirtschaftsinformatik, vol. 52, no. 4, Gabler; Springer, 2010, pp. 225–37. short: G. Schryen, Wirtschaftsinformatik 52 (2010) 225–237. date_created: 2018-11-14T14:38:45Z date_updated: 2022-01-06T07:02:19Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-11T15:21:36Z date_updated: 2018-12-13T15:19:50Z file_id: '6189' file_name: Schryen2010_Article_ÖkonomischerWertVonInformation.pdf file_size: 850718 relation: main_file file_date_updated: 2018-12-13T15:19:50Z has_accepted_license: '1' intvolume: ' 52' issue: '4' language: - iso: eng oa: '1' page: 225-237 publication: Wirtschaftsinformatik publisher: Gabler; Springer status: public title: Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done) type: journal_article user_id: '61579' volume: 52 year: '2010' ... --- _id: '5597' abstract: - lang: eng text: Der Beitrag diskutiert die kontroversen Ans{\"a}tze ? Verifizierung versus Evaluation/Zertifizierung ? zur Sicherung elektronischer Wahlen mit Wahlger{\"a}ten. Dabei spielt das Urteils des Bundesverfassungsgerichts [BVG099] eine zentrale Rolle. Hierin wird entschieden, dass die Zertifizierung des Wahlger{\"a}tes nicht ausreicht und es werden Verifizierungsfunktionen gefordert, die den W{\"a}hlern die M{\"o}glichkeit geben sich von der Integrit{\"a}t des Wahlergebnisses zu {\"u}berzeugen. Der Beitrag zeigt auf, dass auch mit der Implementierung entsprechender Verifizierungsfunktionen nicht auf Zertifizierung verzichtet werden kann, da an ein Wahlger{\"a}t auch andere Anforderungen wie etwa hinsichtlich des Wahlgeheimnisses gestellt werden. Es wird au{\ss}erdem die Frage diskutiert, warum der Zertifizierung hinsichtlich dieser zus{\"a}tzlichen Anforderungen vertraut werden kann, w{\"a}hrend dies nicht der Fall bei der Integrit{\"a}tsanforderung ist. author: - first_name: Melanie full_name: Volkamer, Melanie last_name: Volkamer - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Lucie full_name: Langer, Lucie last_name: Langer - first_name: Axel full_name: Schmidt, Axel last_name: Schmidt - first_name: Johannes full_name: Buchmann, Johannes last_name: Buchmann citation: ama: 'Volkamer M, Schryen G, Langer L, Schmidt A, Buchmann J. Elektronische Wahlen: Verifizierung vs. Zertifizierung. In: Workshop Elektronische Wahlen, Elektronische Teilhabe, Societyware, 39th GI-Jahrestagung. ; 2009.' apa: 'Volkamer, M., Schryen, G., Langer, L., Schmidt, A., & Buchmann, J. (2009). Elektronische Wahlen: Verifizierung vs. Zertifizierung. In Workshop Elektronische Wahlen, elektronische Teilhabe, Societyware, 39th GI-Jahrestagung.' bibtex: '@inproceedings{Volkamer_Schryen_Langer_Schmidt_Buchmann_2009, title={Elektronische Wahlen: Verifizierung vs. Zertifizierung}, booktitle={Workshop Elektronische Wahlen, elektronische Teilhabe, Societyware, 39th GI-Jahrestagung}, author={Volkamer, Melanie and Schryen, Guido and Langer, Lucie and Schmidt, Axel and Buchmann, Johannes}, year={2009} }' chicago: 'Volkamer, Melanie, Guido Schryen, Lucie Langer, Axel Schmidt, and Johannes Buchmann. “Elektronische Wahlen: Verifizierung vs. Zertifizierung.” In Workshop Elektronische Wahlen, Elektronische Teilhabe, Societyware, 39th GI-Jahrestagung, 2009.' ieee: 'M. Volkamer, G. Schryen, L. Langer, A. Schmidt, and J. Buchmann, “Elektronische Wahlen: Verifizierung vs. Zertifizierung,” in Workshop Elektronische Wahlen, elektronische Teilhabe, Societyware, 39th GI-Jahrestagung, 2009.' mla: 'Volkamer, Melanie, et al. “Elektronische Wahlen: Verifizierung vs. Zertifizierung.” Workshop Elektronische Wahlen, Elektronische Teilhabe, Societyware, 39th GI-Jahrestagung, 2009.' short: 'M. Volkamer, G. Schryen, L. Langer, A. Schmidt, J. Buchmann, in: Workshop Elektronische Wahlen, Elektronische Teilhabe, Societyware, 39th GI-Jahrestagung, 2009.' date_created: 2018-11-14T11:49:04Z date_updated: 2022-01-06T07:02:05Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:15:26Z date_updated: 2018-12-18T13:15:26Z file_id: '6313' file_name: Elektronische Wahlen - GI 2009.pdf file_size: 60870 relation: main_file file_date_updated: 2018-12-18T13:15:26Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: Workshop Elektronische Wahlen, elektronische Teilhabe, Societyware, 39th GI-Jahrestagung status: public title: 'Elektronische Wahlen: Verifizierung vs. Zertifizierung' type: conference user_id: '61579' year: '2009' ... --- _id: '5621' abstract: - lang: eng text: Remote voting through the Internet provides convenience and access to the electorate. At the same time, the security concerns facing any distributed application are magnified when the task is so crucial to democratic society. In addition, some of the electoral process loses transparency when it is encapsulated in information technology. In this paper, we examine the public record of three recent elections that used Internet voting. Our specific goal is to identify any potential flaws that security experts would recognize, but may have not been identified in the rush to implement technology. To do this, we present a multiple exploratory case study, looking at elections conducted between 2006 and 2007 in Estonia, Netherlands, and Switzerland. These elections were selected as particularly interesting and accessible, and each presents its own technical and security challenges. The electoral environment, technical design and process for each election are described, including reconstruction of details which are implied but not specified within the source material. We found that all three elections warrant significant concern about voter security, verifiability, and transparency. Usability, our fourth area of focus, seems to have been well-addressed in these elections. While our analysis is based on public documents and previously published reports, and therefore lacking access to any confidential materials held by electoral officials, this comparative analysis provides interesting insight and consistent questions across all these cases. Effective review of Internet voting requires an aggressive stance towards identifying potential security and operational flaws, and we encourage the use of third party reviews with critical technology skills during design, programming, and voting to reduce the changes of failure or fraud that would undermine public confidence. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Eliot full_name: Rich, Eliot last_name: Rich citation: ama: 'Schryen G, Rich E. Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland. IEEE Transactions on Information Forensics \& Security. 2009;4(4 Part):729-744.' apa: 'Schryen, G., & Rich, E. (2009). Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland. IEEE Transactions on Information Forensics \& Security, 4(4 Part), 729–744.' bibtex: '@article{Schryen_Rich_2009, title={Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland}, volume={4}, number={4 Part}, journal={IEEE Transactions on Information Forensics \& Security}, publisher={IEEE}, author={Schryen, Guido and Rich, Eliot}, year={2009}, pages={729–744} }' chicago: 'Schryen, Guido, and Eliot Rich. “Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland.” IEEE Transactions on Information Forensics \& Security 4, no. 4 Part (2009): 729–44.' ieee: 'G. Schryen and E. Rich, “Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland,” IEEE Transactions on Information Forensics \& Security, vol. 4, no. 4 Part, pp. 729–744, 2009.' mla: 'Schryen, Guido, and Eliot Rich. “Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland.” IEEE Transactions on Information Forensics \& Security, vol. 4, no. 4 Part, IEEE, 2009, pp. 729–44.' short: G. Schryen, E. Rich, IEEE Transactions on Information Forensics \& Security 4 (2009) 729–744. date_created: 2018-11-14T14:06:44Z date_updated: 2022-01-06T07:02:12Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:16:07Z date_updated: 2018-12-18T13:16:07Z file_id: '6316' file_name: JOURNAL VERSION.pdf file_size: 1544790 relation: main_file file_date_updated: 2018-12-18T13:16:07Z has_accepted_license: '1' intvolume: ' 4' issue: 4 Part keyword: - e-voting - Internet voting - Internet election - security - verifiability - RIES - Estonia - Neuch{\^a}tel language: - iso: eng oa: '1' page: 729-744 publication: IEEE Transactions on Information Forensics \& Security publisher: IEEE status: public title: 'Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland' type: journal_article user_id: '61579' volume: 4 year: '2009' ... --- _id: '5625' abstract: - lang: eng text: The increasing availability and deployment of open source software in personal and commercial environments makes open source software highly appealing for hackers, and others who are interested in exploiting software vulnerabilities. This deployment has resulted in a debate ?full of religion? on the security of open source software compared to that of closed source software. However, beyond such arguments, only little quantitative analysis on this research issue has taken place. We discuss the state-of-the-art of the security debate and identify shortcomings. Based on these, we propose new metrics, which allows to answer the question to what extent the review process of open source and closed source development has helped to fix vulnerabilities. We illustrate the application of some of these metrics in a case study on OpenOffice (open source software) vs. Microsoft Office (closed source software). author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen - first_name: Rouven full_name: Kadura, Rouven last_name: Kadura citation: ama: 'Schryen G, Kadura R. Open Source vs. Closed Source Software: Towards Measuring Security. In: 24th Annual ACM Symposium on Applied Computing. ; 2009.' apa: 'Schryen, G., & Kadura, R. (2009). Open Source vs. Closed Source Software: Towards Measuring Security. In 24th Annual ACM Symposium on Applied Computing.' bibtex: '@inproceedings{Schryen_Kadura_2009, title={Open Source vs. Closed Source Software: Towards Measuring Security}, booktitle={24th Annual ACM Symposium on Applied Computing}, author={Schryen, Guido and Kadura, Rouven}, year={2009} }' chicago: 'Schryen, Guido, and Rouven Kadura. “Open Source vs. Closed Source Software: Towards Measuring Security.” In 24th Annual ACM Symposium on Applied Computing, 2009.' ieee: 'G. Schryen and R. Kadura, “Open Source vs. Closed Source Software: Towards Measuring Security,” in 24th Annual ACM Symposium on Applied Computing, 2009.' mla: 'Schryen, Guido, and Rouven Kadura. “Open Source vs. Closed Source Software: Towards Measuring Security.” 24th Annual ACM Symposium on Applied Computing, 2009.' short: 'G. Schryen, R. Kadura, in: 24th Annual ACM Symposium on Applied Computing, 2009.' date_created: 2018-11-14T14:12:27Z date_updated: 2022-01-06T07:02:13Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:14:09Z date_updated: 2018-12-18T13:14:09Z file_id: '6310' file_name: ACM VERSION.pdf file_size: 456497 relation: main_file file_date_updated: 2018-12-18T13:14:09Z has_accepted_license: '1' keyword: - Open source software - Closed source software - Security - Metrics language: - iso: eng oa: '1' publication: 24th Annual ACM Symposium on Applied Computing status: public title: 'Open Source vs. Closed Source Software: Towards Measuring Security' type: conference user_id: '61579' year: '2009' ... --- _id: '5646' abstract: - lang: eng text: While many theoretical arguments against or in favor of open source and closed source software development have been presented, the empirical basis for the assessment of arguments is still weak. Addressing this research gap, this paper presents a comprehensive empirical investigation of the patching behavior of software vendors/communities of widely deployed open source and closed source software packages, including operating systems, database systems, web browsers, email clients, and office systems. As the value of any empirical study relies on the quality of data available, this paper also discusses in detail data issues, explains to what extent the empirical analysis can be based on vulnerability data contained in the NIST National Vulnerability Database, and shows how data on vulnerability patches was collected by the author to support this study. The results of the analysis suggest that it is not the particular software development style that determines patching behavior, but rather the policy of the particular software vendor. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors. In: 5th International Conference on IT Security Incident Management \& IT Forensics. ; 2009.' apa: Schryen, G. (2009). A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors. In 5th International Conference on IT Security Incident Management \& IT Forensics. bibtex: '@inproceedings{Schryen_2009, title={A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors}, booktitle={5th International Conference on IT Security Incident Management \& IT Forensics}, author={Schryen, Guido}, year={2009} }' chicago: Schryen, Guido. “A Comprehensive and Comparative Analysis of the Patching Behavior of Open Source and Closed Source Software Vendors.” In 5th International Conference on IT Security Incident Management \& IT Forensics, 2009. ieee: G. Schryen, “A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors,” in 5th International Conference on IT Security Incident Management \& IT Forensics, 2009. mla: Schryen, Guido. “A Comprehensive and Comparative Analysis of the Patching Behavior of Open Source and Closed Source Software Vendors.” 5th International Conference on IT Security Incident Management \& IT Forensics, 2009. short: 'G. Schryen, in: 5th International Conference on IT Security Incident Management \& IT Forensics, 2009.' date_created: 2018-11-14T14:40:04Z date_updated: 2022-01-06T07:02:19Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:14:48Z date_updated: 2018-12-18T13:14:48Z file_id: '6311' file_name: Conference Version.pdf file_size: 594302 relation: main_file file_date_updated: 2018-12-18T13:14:48Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 5th International Conference on IT Security Incident Management \& IT Forensics status: public title: A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors type: conference user_id: '61579' year: '2009' ... --- _id: '5647' abstract: - lang: eng text: Reviewing literature on open source and closed source security reveals that the discussion is often determined by biased attitudes toward one of these development styles. The discussion specifically lacks appropriate metrics, methodology and hard data. This paper contributes to solving this problem by analyzing and comparing published vulnerabilities of eight open source software and nine closed source software packages, all of which are widely deployed. Thereby, it provides an extensive empirical analysis of vulnerabilities in terms of mean time between vulnerability disclosures, the development of disclosure over time, and the severity of vulnerabilities, and allows for validating models provided in the literature. The investigation reveals that (a) the mean time between vulnerability disclosures was lower for open source software in half of the cases, while the other cases show no differences, (b) in contrast to literature assumption, 14 out of 17 software packages showed a significant linear or piecewise linear correlation between time and the number of published vulnerabilities, and (c) regarding the severity of vulnerabilities, no significant differences were found between open source and closed source. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Security of open source and closed source software: An empirical comparison of published vulnerabilities. In: 15th Americas Conference on Information Systems. ; 2009.' apa: 'Schryen, G. (2009). Security of open source and closed source software: An empirical comparison of published vulnerabilities. In 15th Americas Conference on Information Systems.' bibtex: '@inproceedings{Schryen_2009, title={Security of open source and closed source software: An empirical comparison of published vulnerabilities}, booktitle={15th Americas Conference on Information Systems}, author={Schryen, Guido}, year={2009} }' chicago: 'Schryen, Guido. “Security of Open Source and Closed Source Software: An Empirical Comparison of Published Vulnerabilities.” In 15th Americas Conference on Information Systems, 2009.' ieee: 'G. Schryen, “Security of open source and closed source software: An empirical comparison of published vulnerabilities,” in 15th Americas Conference on Information Systems, 2009.' mla: 'Schryen, Guido. “Security of Open Source and Closed Source Software: An Empirical Comparison of Published Vulnerabilities.” 15th Americas Conference on Information Systems, 2009.' short: 'G. Schryen, in: 15th Americas Conference on Information Systems, 2009.' date_created: 2018-11-14T14:41:24Z date_updated: 2022-01-06T07:02:19Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:16:39Z date_updated: 2018-12-18T13:16:39Z file_id: '6317' file_name: Security of Open Source and Closed Source Software An Empirical - AMCIS Version.pdf file_size: 483690 relation: main_file file_date_updated: 2018-12-18T13:16:39Z has_accepted_license: '1' keyword: - Vulnerabilities - security - open source software - closed source software - empirical comparison language: - iso: eng oa: '1' publication: 15th Americas Conference on Information Systems status: public title: 'Security of open source and closed source software: An empirical comparison of published vulnerabilities' type: conference user_id: '61579' year: '2009' ... --- _id: '5648' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Effektivität und Effizienz von Anti-Spam-Maßnahmen. Linux Technical Review. 2008;(7). apa: Schryen, G. (2008). Effektivität und Effizienz von Anti-Spam-Maßnahmen. Linux Technical Review, (7). bibtex: '@article{Schryen_2008, title={Effektivität und Effizienz von Anti-Spam-Maßnahmen}, number={7}, journal={Linux Technical Review}, publisher={Linux New Media AG}, author={Schryen, Guido}, year={2008} }' chicago: Schryen, Guido. “Effektivität Und Effizienz von Anti-Spam-Maßnahmen.” Linux Technical Review, no. 7 (2008). ieee: G. Schryen, “Effektivität und Effizienz von Anti-Spam-Maßnahmen,” Linux Technical Review, no. 7, 2008. mla: Schryen, Guido. “Effektivität Und Effizienz von Anti-Spam-Maßnahmen.” Linux Technical Review, no. 7, Linux New Media AG, 2008. short: G. Schryen, Linux Technical Review (2008). date_created: 2018-11-14T14:41:58Z date_updated: 2022-01-06T07:02:20Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:17:40Z date_updated: 2018-12-18T13:17:40Z file_id: '6319' file_name: Linux Technical Review 2008 - Spam.pdf file_size: 41784 relation: main_file file_date_updated: 2018-12-18T13:17:40Z has_accepted_license: '1' issue: '7' language: - iso: eng oa: '1' publication: Linux Technical Review publisher: Linux New Media AG status: public title: Effektivität und Effizienz von Anti-Spam-Maßnahmen type: journal_article user_id: '61579' year: '2008' ... --- _id: '5649' abstract: - lang: eng text: The Estonian parliamentary election in 2007 is regarded as a success story of large-scale Internet elections. I use this election in a single case study on practical security to show that low quality of security and its management does not necessarily prevent large-scale Internet elections from being conducted. I also provide research propositions with regard to future challenges for large-scale Internet elections. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia. In: 7th Workshop on E-Business (WEB 2008, AIS Special Interest Group on E-Business). ; 2008.' apa: 'Schryen, G. (2008). Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia. In 7th Workshop on e-Business (WEB 2008, AIS Special Interest Group on E-Business).' bibtex: '@inproceedings{Schryen_2008, title={Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia}, booktitle={7th Workshop on e-Business (WEB 2008, AIS Special Interest Group on E-Business)}, author={Schryen, Guido}, year={2008} }' chicago: 'Schryen, Guido. “Practical Security of Large-Scale Elections: An Exploratory Case Study of Internet Voting in Estonia.” In 7th Workshop on E-Business (WEB 2008, AIS Special Interest Group on E-Business), 2008.' ieee: 'G. Schryen, “Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia,” in 7th Workshop on e-Business (WEB 2008, AIS Special Interest Group on E-Business), 2008.' mla: 'Schryen, Guido. “Practical Security of Large-Scale Elections: An Exploratory Case Study of Internet Voting in Estonia.” 7th Workshop on E-Business (WEB 2008, AIS Special Interest Group on E-Business), 2008.' short: 'G. Schryen, in: 7th Workshop on E-Business (WEB 2008, AIS Special Interest Group on E-Business), 2008.' date_created: 2018-11-14T14:43:23Z date_updated: 2022-01-06T07:02:20Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:18:21Z date_updated: 2018-12-18T13:18:21Z file_id: '6320' file_name: Schryen - Practical Security of Large-scale Elections - LNBIP - web version.pdf file_size: 273231 relation: main_file file_date_updated: 2018-12-18T13:18:21Z has_accepted_license: '1' keyword: - Internet voting - large-scale election - Estonian parliamen- tary election - security - security management language: - iso: eng oa: '1' publication: 7th Workshop on e-Business (WEB 2008, AIS Special Interest Group on E-Business) status: public title: 'Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia' type: conference user_id: '61579' year: '2008' ... --- _id: '6287' abstract: - lang: eng text: Spamming remains a form of Internet abuse, which burdens the Internet infrastructure, is generally regarded as an annoyance, and is said to cause a huge economic harm. Many technological, organizational, and legislative anti-spam measures have already been proposed and implemented, but have not led to any substantial decrease in the number of spam e-mails. We propose a scalable and flexible infrastructure framework that integrates several anti-spam measures and that features both a technological and an organizational facet. The key element of our infrastructure is a new organizational unit that reliably and transparently limits the number of e-mails that can be sent per day and per account. We also analyze the proposed framework in terms of its theoretical effectiveness, the required resources, and its limitations. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Preventing E-Mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework.; 2007.' apa: 'Schryen, G. (2007). Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework.' bibtex: '@book{Schryen_2007, title={Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework}, author={Schryen, Guido}, year={2007} }' chicago: 'Schryen, Guido. Preventing E-Mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework, 2007.' ieee: 'G. Schryen, Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework. 2007.' mla: 'Schryen, Guido. Preventing E-Mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework. 2007.' short: 'G. Schryen, Preventing E-Mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework, 2007.' date_created: 2018-12-18T12:50:22Z date_updated: 2022-01-06T07:03:00Z ddc: - '000' department: - _id: '277' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:23:40Z date_updated: 2018-12-18T13:23:40Z file_id: '6322' file_name: anti_spam_framework.pdf file_size: 456755 relation: main_file file_date_updated: 2018-12-18T13:23:40Z has_accepted_license: '1' keyword: - Email - Infrastructure - Internet - Spam language: - iso: eng oa: '1' status: public title: 'Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework' type: report user_id: '61579' year: '2007' ... --- _id: '5650' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. A Scalable and Flexible Infrastructure Framework For Addressing Spam. In: Satesh D, Prabhakar R, eds. Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research. Hyderabad, India: ICFAI University Press; 2007:55-64.' apa: 'Schryen, G. (2007). A Scalable and Flexible Infrastructure Framework For Addressing Spam. In D. Satesh & R. Prabhakar (Eds.), Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research (pp. 55–64). Hyderabad, India: ICFAI University Press.' bibtex: '@inbook{Schryen_2007, place={Hyderabad, India}, title={A Scalable and Flexible Infrastructure Framework For Addressing Spam}, booktitle={Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research}, publisher={ICFAI University Press}, author={Schryen, Guido}, editor={Satesh, D. and Prabhakar, R.Editors}, year={2007}, pages={55–64} }' chicago: 'Schryen, Guido. “A Scalable and Flexible Infrastructure Framework For Addressing Spam.” In Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research, edited by D. Satesh and R. Prabhakar, 55–64. Hyderabad, India: ICFAI University Press, 2007.' ieee: 'G. Schryen, “A Scalable and Flexible Infrastructure Framework For Addressing Spam,” in Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research, D. Satesh and R. Prabhakar, Eds. Hyderabad, India: ICFAI University Press, 2007, pp. 55–64.' mla: Schryen, Guido. “A Scalable and Flexible Infrastructure Framework For Addressing Spam.” Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research, edited by D. Satesh and R. Prabhakar, ICFAI University Press, 2007, pp. 55–64. short: 'G. Schryen, in: D. Satesh, R. Prabhakar (Eds.), Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research, ICFAI University Press, Hyderabad, India, 2007, pp. 55–64.' date_created: 2018-11-14T14:44:01Z date_updated: 2022-01-06T07:02:20Z department: - _id: '277' editor: - first_name: D. full_name: Satesh, D. last_name: Satesh - first_name: R. full_name: Prabhakar, R. last_name: Prabhakar extern: '1' language: - iso: eng page: 55-64 place: Hyderabad, India publication: Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research publisher: ICFAI University Press status: public title: A Scalable and Flexible Infrastructure Framework For Addressing Spam type: book_chapter user_id: '61579' year: '2007' ... --- _id: '5651' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Anti-Spam Measures: Analysis and Design. Berlin, Heidelberg, New York: Springer; 2007.' apa: 'Schryen, G. (2007). Anti-Spam Measures: Analysis and Design. Berlin, Heidelberg, New York: Springer.' bibtex: '@book{Schryen_2007, place={Berlin, Heidelberg, New York}, title={Anti-Spam Measures: Analysis and Design}, publisher={Springer}, author={Schryen, Guido}, year={2007} }' chicago: 'Schryen, Guido. Anti-Spam Measures: Analysis and Design. Berlin, Heidelberg, New York: Springer, 2007.' ieee: 'G. Schryen, Anti-Spam Measures: Analysis and Design. Berlin, Heidelberg, New York: Springer, 2007.' mla: 'Schryen, Guido. Anti-Spam Measures: Analysis and Design. Springer, 2007.' short: 'G. Schryen, Anti-Spam Measures: Analysis and Design, Springer, Berlin, Heidelberg, New York, 2007.' date_created: 2018-11-14T14:45:12Z date_updated: 2022-01-06T07:02:20Z department: - _id: '277' extern: '1' language: - iso: eng place: Berlin, Heidelberg, New York publisher: Springer status: public title: 'Anti-Spam Measures: Analysis and Design' type: book user_id: '61579' year: '2007' ... --- _id: '5652' abstract: - lang: eng text: More than half of world-wide e-mail traffic ? an estimated total of several billion e-mails per day ? consists of spam. This is becoming a considerable disturbance to telecommunications. Spam is also closely related to other kinds of cyber crime as it possibly contains malicious software or is pursuing some kind of fraudulent aim, such as phishing. Besides technical and organizational measures, many countries have introduced anti-spam legislation. However, today's world-wide legislative coverage of spam is heterogeneous, and its effectiveness is controversially discussed. This article describes important parameters by which anti-spam legislation can vary and gives an overview and analysis of world-wide anti-spam legislation, including the European Directive 2002/58/EC, the U.S. CANSPAM Act of 2003, and international cooperation, such as the London Action Plan. The article then proceeds to discuss the effectiveness of current laws, and it identifies problems resulting from the fact that an international phenomenon is being addressed by national legislation. Finally, the article presents suggestions for overcoming some of these problems. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Anti-spam legislation: An analysis of laws and their effectiveness. Information and Communications Technology Law. 2007;16(1):17-32.' apa: 'Schryen, G. (2007). Anti-spam legislation: An analysis of laws and their effectiveness. Information and Communications Technology Law, 16(1), 17–32.' bibtex: '@article{Schryen_2007, title={Anti-spam legislation: An analysis of laws and their effectiveness}, volume={16}, number={1}, journal={Information and Communications Technology Law}, publisher={Taylor \& Francis}, author={Schryen, Guido}, year={2007}, pages={17–32} }' chicago: 'Schryen, Guido. “Anti-Spam Legislation: An Analysis of Laws and Their Effectiveness.” Information and Communications Technology Law 16, no. 1 (2007): 17–32.' ieee: 'G. Schryen, “Anti-spam legislation: An analysis of laws and their effectiveness,” Information and Communications Technology Law, vol. 16, no. 1, pp. 17–32, 2007.' mla: 'Schryen, Guido. “Anti-Spam Legislation: An Analysis of Laws and Their Effectiveness.” Information and Communications Technology Law, vol. 16, no. 1, Taylor \& Francis, 2007, pp. 17–32.' short: G. Schryen, Information and Communications Technology Law 16 (2007) 17–32. date_created: 2018-11-14T14:45:57Z date_updated: 2022-01-06T07:02:21Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:25:48Z date_updated: 2018-12-18T13:25:48Z file_id: '6325' file_name: JOUNAL_VERSION.pdf file_size: 175248 relation: main_file file_date_updated: 2018-12-18T13:25:48Z has_accepted_license: '1' intvolume: ' 16' issue: '1' language: - iso: eng oa: '1' page: 17-32 publication: Information and Communications Technology Law publisher: Taylor \& Francis status: public title: 'Anti-spam legislation: An analysis of laws and their effectiveness' type: journal_article user_id: '61579' volume: 16 year: '2007' ... --- _id: '5653' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Approaches Addressing Spam. In: Satesh D, Prabhakar R, eds. Spam: An Introduction. Hyderabad, India: ICFAI University Press; 2007:41-57.' apa: 'Schryen, G. (2007). Approaches Addressing Spam. In D. Satesh & R. Prabhakar (Eds.), Spam: An Introduction (pp. 41–57). Hyderabad, India: ICFAI University Press.' bibtex: '@inbook{Schryen_2007, place={Hyderabad, India}, title={Approaches Addressing Spam}, booktitle={Spam: An Introduction}, publisher={ICFAI University Press}, author={Schryen, Guido}, editor={Satesh, D. and Prabhakar, R.Editors}, year={2007}, pages={41–57} }' chicago: 'Schryen, Guido. “Approaches Addressing Spam.” In Spam: An Introduction, edited by D. Satesh and R. Prabhakar, 41–57. Hyderabad, India: ICFAI University Press, 2007.' ieee: 'G. Schryen, “Approaches Addressing Spam,” in Spam: An Introduction, D. Satesh and R. Prabhakar, Eds. Hyderabad, India: ICFAI University Press, 2007, pp. 41–57.' mla: 'Schryen, Guido. “Approaches Addressing Spam.” Spam: An Introduction, edited by D. Satesh and R. Prabhakar, ICFAI University Press, 2007, pp. 41–57.' short: 'G. Schryen, in: D. Satesh, R. Prabhakar (Eds.), Spam: An Introduction, ICFAI University Press, Hyderabad, India, 2007, pp. 41–57.' date_created: 2018-11-14T14:46:28Z date_updated: 2022-01-06T07:02:21Z department: - _id: '277' editor: - first_name: D. full_name: Satesh, D. last_name: Satesh - first_name: R. full_name: Prabhakar, R. last_name: Prabhakar extern: '1' language: - iso: eng page: 41-57 place: Hyderabad, India publication: 'Spam: An Introduction' publisher: ICFAI University Press status: public title: Approaches Addressing Spam type: book_chapter user_id: '61579' year: '2007' ... --- _id: '5654' abstract: - lang: eng text: Spamming remains a form of Internet abuse, which burdens the Internet infrastructure, is generally regarded as an annoyance, and is said to cause economic harm to the tune of about several billion US\$ per year. Many technological, organizational, and legislative anti-spam measures have already been proposed and implemented, but have not led to any substantial decrease in the number of spam e-mails. We propose here a new infrastructure framework that combines several anti-spam measures in a framework that features both a technological and an organizational facet. The key element of our infrastructure is a new organizational unit that reliably and transparently limits he number of e-mails that can be sent per day and per account. This paper first gives an overview of the framework, then it provides technological and organizational details of the infrastructure, the deployment of which depends to a large degree on its acceptance and propagation by the ICANN, the ISOC, and by large e-mail service providers. Finally, the paper discusses the limitations and drawbacks of the proposed framework. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Armed for the spam battle - a technological and organizational infrastructure framework. In: 40th Annual Hawaii International Conference on System Sciences. ; 2007.' apa: Schryen, G. (2007). Armed for the spam battle - a technological and organizational infrastructure framework. In 40th Annual Hawaii International Conference on System Sciences. bibtex: '@inproceedings{Schryen_2007, title={Armed for the spam battle - a technological and organizational infrastructure framework}, booktitle={40th Annual Hawaii International Conference on System Sciences}, author={Schryen, Guido}, year={2007} }' chicago: Schryen, Guido. “Armed for the Spam Battle - a Technological and Organizational Infrastructure Framework.” In 40th Annual Hawaii International Conference on System Sciences, 2007. ieee: G. Schryen, “Armed for the spam battle - a technological and organizational infrastructure framework,” in 40th Annual Hawaii International Conference on System Sciences, 2007. mla: Schryen, Guido. “Armed for the Spam Battle - a Technological and Organizational Infrastructure Framework.” 40th Annual Hawaii International Conference on System Sciences, 2007. short: 'G. Schryen, in: 40th Annual Hawaii International Conference on System Sciences, 2007.' date_created: 2018-11-14T14:46:49Z date_updated: 2022-01-06T07:02:21Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:24:34Z date_updated: 2018-12-18T13:24:34Z file_id: '6323' file_name: Armed for the spam battle - a technological and organizational infrastructure framework - proceeding version.pdf file_size: 338482 relation: main_file file_date_updated: 2018-12-18T13:24:34Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 40th Annual Hawaii International Conference on System Sciences status: public title: Armed for the spam battle - a technological and organizational infrastructure framework type: conference user_id: '61579' year: '2007' ... --- _id: '5655' abstract: - lang: eng text: Spam e-mails have become a serious technological and economic problem. Up to now, by deploying complementary anti-spam measures, we have been reasonably able to withstand spam e-mails and use the Internet for regular communication. However, if we are to avert the danger of losing the Internet e-mail service in its capacity as a valuable, free and worldwide medium of open communication, anti-spam activities should be performed more systematically than is currently the case regarding the mainly heuristic, anti-spam measures in place. A formal framework, within which the existing delivery routes that a spam e-mail may take, and anti-spam measures and their effectiveness can be investigated, will perhaps encourage a shift in methodology and pave the way for new, holistic anti-spam measures. This paper presents a model of the Internet e-mail infrastructure as a directed graph and a deterministic finite automaton and draws on automata theory to formally derive the spam delivery routes. The most important anti-spam measures are then described. Methods controlling only specific delivery routes are evaluated in terms of how effectively they cover the modeled e-mail infrastructure; methods operating independently of any particular routes receive a more general assessment. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Do anti-spam measures effectively cover the e-mail communication network? A formal approach. The Journal of Information Systems Security (AIS Special Interest Group in Security). 2007;3(2):66-90. apa: Schryen, G. (2007). Do anti-spam measures effectively cover the e-mail communication network? A formal approach. The Journal of Information Systems Security (AIS Special Interest Group in Security), 3(2), 66–90. bibtex: '@article{Schryen_2007, title={Do anti-spam measures effectively cover the e-mail communication network? A formal approach}, volume={3}, number={2}, journal={The Journal of Information Systems Security (AIS Special Interest Group in Security)}, author={Schryen, Guido}, year={2007}, pages={66–90} }' chicago: 'Schryen, Guido. “Do Anti-Spam Measures Effectively Cover the e-Mail Communication Network? A Formal Approach.” The Journal of Information Systems Security (AIS Special Interest Group in Security) 3, no. 2 (2007): 66–90.' ieee: G. Schryen, “Do anti-spam measures effectively cover the e-mail communication network? A formal approach,” The Journal of Information Systems Security (AIS Special Interest Group in Security), vol. 3, no. 2, pp. 66–90, 2007. mla: Schryen, Guido. “Do Anti-Spam Measures Effectively Cover the e-Mail Communication Network? A Formal Approach.” The Journal of Information Systems Security (AIS Special Interest Group in Security), vol. 3, no. 2, 2007, pp. 66–90. short: G. Schryen, The Journal of Information Systems Security (AIS Special Interest Group in Security) 3 (2007) 66–90. date_created: 2018-11-14T14:51:41Z date_updated: 2022-01-06T07:02:22Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:25:12Z date_updated: 2018-12-18T13:25:12Z file_id: '6324' file_name: Do anti-spam measures effectively cover the e-mail communication - Journal version.pdf file_size: 100448 relation: main_file file_date_updated: 2018-12-18T13:25:12Z has_accepted_license: '1' intvolume: ' 3' issue: '2' keyword: - e-mail - spam - e-mail infrastructure - anti-spam measures - spamming options language: - iso: eng oa: '1' page: 66-90 publication: The Journal of Information Systems Security (AIS Special Interest Group in Security) status: public title: Do anti-spam measures effectively cover the e-mail communication network? A formal approach type: journal_article user_id: '61579' volume: 3 year: '2007' ... --- _id: '5656' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Location Based Services. In: Schulte H, ed. Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen. Kissing: Interest-Verlag; 2007.' apa: 'Schryen, G. (2007). Location Based Services. In H. Schulte (Ed.), Vom LAN zum Kommunikationsnetz - Systeme und Applikationen. Kissing: Interest-Verlag.' bibtex: '@inbook{Schryen_2007, place={Kissing}, title={Location Based Services}, booktitle={Vom LAN zum Kommunikationsnetz - Systeme und Applikationen}, publisher={Interest-Verlag}, author={Schryen, Guido}, editor={Schulte, HeinzEditor}, year={2007} }' chicago: 'Schryen, Guido. “Location Based Services.” In Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, edited by Heinz Schulte. Kissing: Interest-Verlag, 2007.' ieee: 'G. Schryen, “Location Based Services,” in Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, H. Schulte, Ed. Kissing: Interest-Verlag, 2007.' mla: Schryen, Guido. “Location Based Services.” Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, edited by Heinz Schulte, Interest-Verlag, 2007. short: 'G. Schryen, in: H. Schulte (Ed.), Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Interest-Verlag, Kissing, 2007.' date_created: 2018-11-14T14:52:09Z date_updated: 2022-01-06T07:02:22Z department: - _id: '277' editor: - first_name: Heinz full_name: Schulte, Heinz last_name: Schulte extern: '1' language: - iso: eng place: Kissing publication: Vom LAN zum Kommunikationsnetz - Systeme und Applikationen publisher: Interest-Verlag status: public title: Location Based Services type: book_chapter user_id: '61579' year: '2007' ... --- _id: '5657' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Spam-Emails. In: Schulte H, ed. Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Edition 02/2007. Vol 9/12. Kissing: Interest-Verlag; 2007.' apa: 'Schryen, G. (2007). Spam-Emails. In H. Schulte (Ed.), Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007 (Vol. 9/12). Kissing: Interest-Verlag.' bibtex: '@inbook{Schryen_2007, place={Kissing}, title={Spam-Emails}, volume={9/12}, booktitle={Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007}, publisher={Interest-Verlag}, author={Schryen, Guido}, editor={Schulte, HeinzEditor}, year={2007} }' chicago: 'Schryen, Guido. “Spam-Emails.” In Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Edition 02/2007, edited by Heinz Schulte, Vol. 9/12. Kissing: Interest-Verlag, 2007.' ieee: 'G. Schryen, “Spam-Emails,” in Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007, vol. 9/12, H. Schulte, Ed. Kissing: Interest-Verlag, 2007.' mla: Schryen, Guido. “Spam-Emails.” Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Edition 02/2007, edited by Heinz Schulte, vol. 9/12, Interest-Verlag, 2007. short: 'G. Schryen, in: H. Schulte (Ed.), Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Edition 02/2007, Interest-Verlag, Kissing, 2007.' date_created: 2018-11-14T14:52:32Z date_updated: 2022-01-06T07:02:22Z department: - _id: '277' editor: - first_name: Heinz full_name: Schulte, Heinz last_name: Schulte extern: '1' language: - iso: eng place: Kissing publication: Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007 publisher: Interest-Verlag status: public title: Spam-Emails type: book_chapter user_id: '61579' volume: 9/12 year: '2007' ... --- _id: '5658' abstract: - lang: eng text: 'Email communication is encumbered with a mass of email messages which their recipients have neither requested nor require. Even worse, the impacts of these messages are far from being simply an annoyance, as they also involve economic damage. This manuscript examines the resource ?email addresses?, which is vital for any potential bulk mailer and spammer. Both a methodology and a honeypot conceptualization for implementing an empirical analysis of the usage of email addresses placed on the Internet are proposed here. Their objective is to assess, on a quantitative basis, the extent of the current harassment and its development over time. This ?framework? is intended to be extensible to measuring the effectiveness of address-obscuring techniques. The implementation of a pilot honeypot is described, which led to key findings, some of them being: (1) Web placements attract more than two-thirds (70\%) of all honeypot spam emails, followed by newsgroup placements (28.6\%) and newsletter subscriptions (1.4\%), (2) the proportions of spam relating to the email addresses? top-level domain can be statistically assumed to be uniformly distributed, (3) More than 43\% of addresses on the web have been abused, whereas about 27\% was the case for addresses on newsgroups and only about 4\% was the case for addresses used for a newsletter subscription, (4) Regarding the development of email addresses? attractiveness for spammers over time, the service ?web sites? features a negative linear relationship, whereas the service ?Usenet? hows a negative exponential relationship. (5) Only 1.54\% of the spam emails showed an interrelation between the topic of the spam email and that of the location where the recipient?s address was placed, so that spammers are assumed to send their emails in a ?context insensitive? manner. The results of the empirical analysis motivate the need for the protection of email addresses through obscuration. We analyze this need by formulating requirements for address obscuring techniques and we reveal to which extent today?s most relevant approaches fulfill these requirements.' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis. Computers & Security. 2007;2(5):361-372. apa: Schryen, G. (2007). The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis. Computers & Security, 2(5), 361–372. bibtex: '@article{Schryen_2007, title={The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis}, volume={2}, number={5}, journal={Computers & Security}, publisher={Elsevier}, author={Schryen, Guido}, year={2007}, pages={361–372} }' chicago: 'Schryen, Guido. “The Impact That Placing Email Addresses on the Internet Has on the Receipt of Spam ? An Empirical Analysis.” Computers & Security 2, no. 5 (2007): 361–72.' ieee: G. Schryen, “The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis,” Computers & Security, vol. 2, no. 5, pp. 361–372, 2007. mla: Schryen, Guido. “The Impact That Placing Email Addresses on the Internet Has on the Receipt of Spam ? An Empirical Analysis.” Computers & Security, vol. 2, no. 5, Elsevier, 2007, pp. 361–72. short: G. Schryen, Computers & Security 2 (2007) 361–372. date_created: 2018-11-14T14:53:12Z date_updated: 2022-01-06T07:02:22Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:27:01Z date_updated: 2018-12-18T13:27:01Z file_id: '6326' file_name: The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam - An Empirical Analysis - Journal version.pdf file_size: 3026200 relation: main_file file_date_updated: 2018-12-18T13:27:01Z has_accepted_license: '1' intvolume: ' 2' issue: '5' keyword: - Address-obfuscating techniques - email - empirical analysis - honeypot - security by design - security by obscurity - spam language: - iso: eng oa: '1' page: 361-372 publication: Computers & Security publisher: Elsevier status: public title: The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis type: journal_article user_id: '61579' volume: 2 year: '2007' ... --- _id: '5659' abstract: - lang: eng text: Spam e-mails have become a serious technological and economic problem. So far we have been reasonably able to resist spam e-mails and use the Internet for regular communication by deploying complementary anti-spam approaches. However, if we are to avert the danger of losing the Internet email service as a valuable, free, and worldwide medium of open communication, anti-spam activities should be performed more systematically than is done in current, mainly heuristic, anti-spam approaches. A formal framework within which the modes of spam delivery, anti-spam approaches, and their effectiveness can be investigated, may encourage a shift in methodology and pave the way for new, holistic anti-spam approaches. This paper presents a model of the Internet e-mail infrastructure as a directed graph and a deterministic finite automaton, and draws on automata theory to formally derive the modes of spam delivery possible. Finally the effectiveness of anti-spam approaches in terms of coverage of spamming modes is assessed. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. A formal approach towards assessing the effectiveness of anti-spam procedures. In: 39th Annual Hawaii International Conference on System Sciences. ; 2006.' apa: Schryen, G. (2006). A formal approach towards assessing the effectiveness of anti-spam procedures. In 39th Annual Hawaii International Conference on System Sciences. bibtex: '@inproceedings{Schryen_2006, title={A formal approach towards assessing the effectiveness of anti-spam procedures}, booktitle={39th Annual Hawaii International Conference on System Sciences}, author={Schryen, Guido}, year={2006} }' chicago: Schryen, Guido. “A Formal Approach towards Assessing the Effectiveness of Anti-Spam Procedures.” In 39th Annual Hawaii International Conference on System Sciences, 2006. ieee: G. Schryen, “A formal approach towards assessing the effectiveness of anti-spam procedures,” in 39th Annual Hawaii International Conference on System Sciences, 2006. mla: Schryen, Guido. “A Formal Approach towards Assessing the Effectiveness of Anti-Spam Procedures.” 39th Annual Hawaii International Conference on System Sciences, 2006. short: 'G. Schryen, in: 39th Annual Hawaii International Conference on System Sciences, 2006.' date_created: 2018-11-14T14:54:44Z date_updated: 2022-01-06T07:02:22Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:29:29Z date_updated: 2018-12-18T13:29:29Z file_id: '6327' file_name: Conference Version - A formal approach towards assessing the effectiveness of anti spam approaches.pdf file_size: 176033 relation: main_file file_date_updated: 2018-12-18T13:29:29Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 39th Annual Hawaii International Conference on System Sciences status: public title: A formal approach towards assessing the effectiveness of anti-spam procedures type: conference user_id: '61579' year: '2006' ... --- _id: '5660' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. A honeypot for the exploration of spammers’ behaviour. IATAC IAnewsletter. 2005;8(3):22-25. apa: Schryen, G. (2005). A honeypot for the exploration of spammers’ behaviour. IATAC IAnewsletter, 8(3), 22–25. bibtex: '@article{Schryen_2005, title={A honeypot for the exploration of spammers’ behaviour}, volume={8}, number={3}, journal={IATAC IAnewsletter}, publisher={United States Department of Defense}, author={Schryen, Guido}, year={2005}, pages={22–25} }' chicago: 'Schryen, Guido. “A Honeypot for the Exploration of Spammers’ Behaviour.” IATAC IAnewsletter 8, no. 3 (2005): 22–25.' ieee: G. Schryen, “A honeypot for the exploration of spammers’ behaviour,” IATAC IAnewsletter, vol. 8, no. 3, pp. 22–25, 2005. mla: Schryen, Guido. “A Honeypot for the Exploration of Spammers’ Behaviour.” IATAC IAnewsletter, vol. 8, no. 3, United States Department of Defense, 2005, pp. 22–25. short: G. Schryen, IATAC IAnewsletter 8 (2005) 22–25. date_created: 2018-11-14T14:55:09Z date_updated: 2022-01-06T07:02:24Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:31:04Z date_updated: 2018-12-18T13:31:04Z file_id: '6330' file_name: Honeypot for the Exploration of Spammers Behavior - journal version.pdf file_size: 3394223 relation: main_file file_date_updated: 2018-12-18T13:31:04Z has_accepted_license: '1' intvolume: ' 8' issue: '3' language: - iso: eng oa: '1' page: 22-25 publication: IATAC IAnewsletter publisher: United States Department of Defense status: public title: A honeypot for the exploration of spammers' behaviour type: journal_article user_id: '61579' volume: 8 year: '2005' ... --- _id: '5661' abstract: - lang: eng text: Spam has become one of the most annoying and costly phenomenon in the Internet. Valid e-mail addresses belong to the most valuable resources of spammers, but little is known about spammers? behavior when collecting and harvesting addresses and spammers? capabilities and interest in carefully directed, consumer-oriented marketing have not been explored yet. Gaining insight into spammers? ways to obtain and (mis)use e-mail addresses is useful in many ways, e.g. for the assessment of the effectiveness of address obscuring techniques and the usability and necessity of hiding e-mail addresses on the Internet. This paper presents a spam honeypot project in progress addressing these issues by systematically placing e-mail addresses in the Internet and analyzing received e-mails. The honeypot?s conceptual framework, its implementation, and first empirical results are presented. Finally, an outlook on further work and activities is provided. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. An e-mail honeypot addressing spammers’ behavior in collecting and applying addresses. In: Proceedings of the 6th IEEE Information Assurance Workshop. Westpoint; 2005:37-41.' apa: Schryen, G. (2005). An e-mail honeypot addressing spammers’ behavior in collecting and applying addresses. In Proceedings of the 6th IEEE Information Assurance Workshop (pp. 37–41). Westpoint. bibtex: '@inproceedings{Schryen_2005, title={An e-mail honeypot addressing spammers’ behavior in collecting and applying addresses}, booktitle={Proceedings of the 6th IEEE Information Assurance Workshop}, publisher={Westpoint}, author={Schryen, Guido}, year={2005}, pages={37–41} }' chicago: Schryen, Guido. “An E-Mail Honeypot Addressing Spammers’ Behavior in Collecting and Applying Addresses.” In Proceedings of the 6th IEEE Information Assurance Workshop, 37–41. Westpoint, 2005. ieee: G. Schryen, “An e-mail honeypot addressing spammers’ behavior in collecting and applying addresses,” in Proceedings of the 6th IEEE Information Assurance Workshop, 2005, pp. 37–41. mla: Schryen, Guido. “An E-Mail Honeypot Addressing Spammers’ Behavior in Collecting and Applying Addresses.” Proceedings of the 6th IEEE Information Assurance Workshop, Westpoint, 2005, pp. 37–41. short: 'G. Schryen, in: Proceedings of the 6th IEEE Information Assurance Workshop, Westpoint, 2005, pp. 37–41.' date_created: 2018-11-14T14:55:48Z date_updated: 2022-01-06T07:02:24Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:31:41Z date_updated: 2018-12-18T13:31:41Z file_id: '6331' file_name: Schryen - An e-mail honeypot addressing spammers' behavior in collecting and applying addresses.pdf file_size: 119362 relation: main_file file_date_updated: 2018-12-18T13:31:41Z has_accepted_license: '1' keyword: - Spam - ham - e-mail - honeypot - address obscuring technique - address taxonomy language: - iso: eng oa: '1' page: 37-41 publication: Proceedings of the 6th IEEE Information Assurance Workshop publisher: Westpoint status: public title: An e-mail honeypot addressing spammers' behavior in collecting and applying addresses type: conference user_id: '61579' year: '2005' ... --- _id: '5765' abstract: - lang: eng text: Voting via the Internet has become a feasible option for political as well as non-political ballots. However, there are many obstacles which have to be overcome, especially legal restrictions have to be transformed into technical and security solutions. The article starts with a brief presentation of advantages and disadvantages of Internet ballots and presents application fields and pilot schemes. Then, technological security aspects are derived due to democratic basic principles. Especially the applied voting procedures are critical in security terms. Hence, the most relevant cryptographic protocols are presented and their drawbacks and shortcomings are identified. However, this article does not propose a new voting protocol. Beyond fixing cryptographic procedures for ballots, more elements are to be specified, e.g. responsibilities and rights of involved authorities or security precautions regarding hardware and software. For this reason, a structural security framework for electronic voting systems is presented which can be used for their composition and analysis. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Security Aspects of Internet Voting. In: 37th Annual Hawaii International Conference on System Sciences. ; 2004.' apa: Schryen, G. (2004). Security Aspects of Internet Voting. In 37th Annual Hawaii International Conference on System Sciences. bibtex: '@inproceedings{Schryen_2004, title={Security Aspects of Internet Voting}, booktitle={37th Annual Hawaii International Conference on System Sciences}, author={Schryen, Guido}, year={2004} }' chicago: Schryen, Guido. “Security Aspects of Internet Voting.” In 37th Annual Hawaii International Conference on System Sciences, 2004. ieee: G. Schryen, “Security Aspects of Internet Voting,” in 37th Annual Hawaii International Conference on System Sciences, 2004. mla: Schryen, Guido. “Security Aspects of Internet Voting.” 37th Annual Hawaii International Conference on System Sciences, 2004. short: 'G. Schryen, in: 37th Annual Hawaii International Conference on System Sciences, 2004.' date_created: 2018-11-20T13:02:25Z date_updated: 2022-01-06T07:02:39Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:32:44Z date_updated: 2018-12-18T13:32:44Z file_id: '6332' file_name: Conference version - Security Aspects of Internet Voting.pdf file_size: 385671 relation: main_file file_date_updated: 2018-12-18T13:32:44Z has_accepted_license: '1' language: - iso: eng oa: '1' publication: 37th Annual Hawaii International Conference on System Sciences status: public title: Security Aspects of Internet Voting type: conference user_id: '61579' year: '2004' ... --- _id: '5662' abstract: - lang: eng text: Spam als unerwünschte Massen-E-Mail hat die Grenze von der Belästigung zur ökonomischen Relevanz längst überschritten. Ihr relativer Anteil am gesamten, weltweiten E-Mail-Aufkommen stieg in den vergangenen Jahren auf mehr als 50% im Jahr 2003. Es entstehen jährlich volkswirtschaftliche Schäden in Milliardenhöhe. Zur Bekämpfung des Spam-Problems werden neben gesetzlichen Regelungen vor allem technische Lösungen eingesetzt, bei denen das Blockieren und Filtern von E-Mails in praktisch eingesetzten Anti-Spam-Systemen dominieren. Dieser Artikel führt in die Spam-Problematik ein und beschreibt, bewertet und klassifiziert die derzeit bedeutendsten Verfahren zur Bekämpfung von Spam. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: Schryen G. Effektivität von Lösungsansätzen zur Bekämpfung von Spam. Wirtschaftsinformatik. 2004;46(4):281-288. apa: Schryen, G. (2004). Effektivität von Lösungsansätzen zur Bekämpfung von Spam. Wirtschaftsinformatik, 46(4), 281–288. bibtex: '@article{Schryen_2004, title={Effektivität von Lösungsansätzen zur Bekämpfung von Spam}, volume={46}, number={4}, journal={Wirtschaftsinformatik}, publisher={Springer}, author={Schryen, Guido}, year={2004}, pages={281–288} }' chicago: 'Schryen, Guido. “Effektivität von Lösungsansätzen Zur Bekämpfung von Spam.” Wirtschaftsinformatik 46, no. 4 (2004): 281–88.' ieee: G. Schryen, “Effektivität von Lösungsansätzen zur Bekämpfung von Spam,” Wirtschaftsinformatik, vol. 46, no. 4, pp. 281–288, 2004. mla: Schryen, Guido. “Effektivität von Lösungsansätzen Zur Bekämpfung von Spam.” Wirtschaftsinformatik, vol. 46, no. 4, Springer, 2004, pp. 281–88. short: G. Schryen, Wirtschaftsinformatik 46 (2004) 281–288. date_created: 2018-11-14T14:56:51Z date_updated: 2022-01-06T07:02:24Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:36:34Z date_updated: 2018-12-18T13:36:34Z file_id: '6338' file_name: Verlagsversion Guido_Schryen__281__288.pdf file_size: 288686 relation: main_file file_date_updated: 2018-12-18T13:36:34Z has_accepted_license: '1' intvolume: ' 46' issue: '4' keyword: - Spam - E-Mail - Spoofing - Blockieren - Filtern - Lightweight Mail Transfer Agent Authentication Protocol (LMAP) language: - iso: eng oa: '1' page: 281-288 publication: Wirtschaftsinformatik publisher: Springer status: public title: Effektivität von Lösungsansätzen zur Bekämpfung von Spam type: journal_article user_id: '61579' volume: 46 year: '2004' ... --- _id: '5663' abstract: - lang: eng text: Spam as unsolicited e-mail to a large number of recipients is known to ecome an increasingly disturbing and costly issue of electronic business and internet traffic. Mainly technical-oriented approaches are applied with a focus on blocking, filtering, and authentication mechanisms based on the domain name system. They come along with different drawbacks and have all low effectiveness in common. The article sketches these approaches, shows its limitations, and proposes an account-based approach where the number of e-mails per day and account is restricted. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Fighting Spam: Motivating an Account-based Approach. In: Isaias P, ed. Proceedings of the IADIS International Conference WWW/Internet 2004. Vol. 2. Madrid: IADIS Press; 2004:937-940.' apa: 'Schryen, G. (2004). Fighting Spam: Motivating an Account-based Approach. In P. Isaias (Ed.), Proceedings of the IADIS International Conference WWW/Internet 2004. vol. 2 (pp. 937–940). Madrid: IADIS Press.' bibtex: '@inproceedings{Schryen_2004, place={Madrid}, title={Fighting Spam: Motivating an Account-based Approach}, booktitle={Proceedings of the IADIS International Conference WWW/Internet 2004. vol. 2}, publisher={IADIS Press}, author={Schryen, Guido}, editor={Isaias, PedroEditor}, year={2004}, pages={937–940} }' chicago: 'Schryen, Guido. “Fighting Spam: Motivating an Account-Based Approach.” In Proceedings of the IADIS International Conference WWW/Internet 2004. Vol. 2, edited by Pedro Isaias, 937–40. Madrid: IADIS Press, 2004.' ieee: 'G. Schryen, “Fighting Spam: Motivating an Account-based Approach,” in Proceedings of the IADIS International Conference WWW/Internet 2004. vol. 2, 2004, pp. 937–940.' mla: 'Schryen, Guido. “Fighting Spam: Motivating an Account-Based Approach.” Proceedings of the IADIS International Conference WWW/Internet 2004. Vol. 2, edited by Pedro Isaias, IADIS Press, 2004, pp. 937–40.' short: 'G. Schryen, in: P. Isaias (Ed.), Proceedings of the IADIS International Conference WWW/Internet 2004. Vol. 2, IADIS Press, Madrid, 2004, pp. 937–940.' date_created: 2018-11-14T14:59:03Z date_updated: 2022-01-06T07:02:25Z ddc: - '000' department: - _id: '277' editor: - first_name: Pedro full_name: Isaias, Pedro last_name: Isaias extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:33:30Z date_updated: 2018-12-18T13:33:30Z file_id: '6333' file_name: Fighting Spam_Motivating an account-based approach.pdf file_size: 46083 relation: main_file file_date_updated: 2018-12-18T13:33:30Z has_accepted_license: '1' keyword: - e-mail - spam - filtering - blocking - LMAP - SMTP account language: - iso: eng oa: '1' page: 937-940 place: Madrid publication: Proceedings of the IADIS International Conference WWW/Internet 2004. vol. 2 publisher: IADIS Press status: public title: 'Fighting Spam: Motivating an Account-based Approach' type: conference user_id: '61579' year: '2004' ... --- _id: '5664' abstract: - lang: eng text: Remote Internet voting systems still suffer from many security problems which rely on the clients, the servers, and the network connections. Denial-ofservice attacks and viruses still belong to the most challenging security issues. Projects and studies like the ?Voting Technology Project? of CALTECH and MIT or SERVE of the US Department of Defense set up to gain experience evidence many of the notional weaknesses of current Internet voting systems. author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. How Security Problems Can Compromise Remote Internet Voting Systems. In: Workshop of the ESF TED Programme. ; 2004:121-131.' apa: Schryen, G. (2004). How Security Problems Can Compromise Remote Internet Voting Systems. In Workshop of the ESF TED Programme (pp. 121–131). bibtex: '@inproceedings{Schryen_2004, title={How Security Problems Can Compromise Remote Internet Voting Systems}, booktitle={Workshop of the ESF TED Programme}, author={Schryen, Guido}, year={2004}, pages={121–131} }' chicago: Schryen, Guido. “How Security Problems Can Compromise Remote Internet Voting Systems.” In Workshop of the ESF TED Programme, 121–31, 2004. ieee: G. Schryen, “How Security Problems Can Compromise Remote Internet Voting Systems,” in Workshop of the ESF TED Programme, 2004, pp. 121–131. mla: Schryen, Guido. “How Security Problems Can Compromise Remote Internet Voting Systems.” Workshop of the ESF TED Programme, 2004, pp. 121–31. short: 'G. Schryen, in: Workshop of the ESF TED Programme, 2004, pp. 121–131.' date_created: 2018-11-14T14:59:31Z date_updated: 2022-01-06T07:02:25Z ddc: - '000' department: - _id: '277' extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:34:32Z date_updated: 2018-12-18T13:34:32Z file_id: '6335' file_name: Official paper schryen_e-voting_in_europe.pdf file_size: 516042 relation: main_file file_date_updated: 2018-12-18T13:34:32Z has_accepted_license: '1' language: - iso: eng oa: '1' page: 121-131 publication: Workshop of the ESF TED Programme status: public title: How Security Problems Can Compromise Remote Internet Voting Systems type: conference user_id: '61579' year: '2004' ... --- _id: '5666' author: - first_name: Guido full_name: Schryen, Guido id: '72850' last_name: Schryen citation: ama: 'Schryen G. Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz? In: Gehrke G, ed. Digitale Teilung - Digitale Integration : Perspektiven Der Internetnutzung. München: KOPAED-Verlag; 2004:45-51.' apa: 'Schryen, G. (2004). Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz? In G. Gehrke (Ed.), Digitale Teilung - digitale Integration : Perspektiven der Internetnutzung (pp. 45–51). München: KOPAED-Verlag.' bibtex: '@inbook{Schryen_2004, place={München}, title={Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz?}, booktitle={Digitale Teilung - digitale Integration : Perspektiven der Internetnutzung}, publisher={KOPAED-Verlag}, author={Schryen, Guido}, editor={Gehrke, GernotEditor}, year={2004}, pages={45–51} }' chicago: 'Schryen, Guido. “Neulich Am Hotspot - Bringt Mobiles Internet Die Menschen Ins Netz?” In Digitale Teilung - Digitale Integration : Perspektiven Der Internetnutzung, edited by Gernot Gehrke, 45–51. München: KOPAED-Verlag, 2004.' ieee: 'G. Schryen, “Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz?,” in Digitale Teilung - digitale Integration : Perspektiven der Internetnutzung, G. Gehrke, Ed. München: KOPAED-Verlag, 2004, pp. 45–51.' mla: 'Schryen, Guido. “Neulich Am Hotspot - Bringt Mobiles Internet Die Menschen Ins Netz?” Digitale Teilung - Digitale Integration : Perspektiven Der Internetnutzung, edited by Gernot Gehrke, KOPAED-Verlag, 2004, pp. 45–51.' short: 'G. Schryen, in: G. Gehrke (Ed.), Digitale Teilung - Digitale Integration : Perspektiven Der Internetnutzung, KOPAED-Verlag, München, 2004, pp. 45–51.' date_created: 2018-11-14T15:00:48Z date_updated: 2022-01-06T07:02:25Z ddc: - '000' department: - _id: '277' editor: - first_name: Gernot full_name: Gehrke, Gernot last_name: Gehrke extern: '1' file: - access_level: open_access content_type: application/pdf creator: hsiemes date_created: 2018-12-18T13:35:32Z date_updated: 2018-12-18T13:35:32Z file_id: '6337' file_name: Schryen - Neulich am Hot Spot.pdf file_size: 121468 relation: main_file file_date_updated: 2018-12-18T13:35:32Z has_accepted_license: '1' language: - iso: eng oa: '1' page: 45-51 place: München publication: 'Digitale Teilung - digitale Integration : Perspektiven der Internetnutzung' publisher: KOPAED-Verlag status: public title: Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz? type: book_chapter user_id: '61579' year: '2004' ...