[{"file":[{"date_updated":"2018-12-13T15:05:44Z","creator":"hsiemes","date_created":"2018-12-07T11:25:06Z","file_size":488472,"file_name":"2018_ISCRAM_Conference_Proceedings - Publication Version.pdf","file_id":"6020","access_level":"open_access","content_type":"application/pdf","relation":"main_file"}],"status":"public","abstract":[{"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.","lang":"eng"}],"type":"conference","publication":"Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management","file_date_updated":"2018-12-13T15:05:44Z","language":[{"iso":"eng"}],"extern":"1","ddc":["000"],"keyword":["Coordination of spontaneous volunteers","volunteer coordination system","decision support","scheduling optimization model","linear programming"],"user_id":"61579","department":[{"_id":"277"}],"_id":"5675","citation":{"short":"G. Rauchecker, G. Schryen, in: Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management, 2018.","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} }","mla":"Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief.” <i>Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management</i>, 2018.","apa":"Rauchecker, G., &#38; Schryen, G. (2018). Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief. In <i>Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management</i>. Rochester, NY, USA.","chicago":"Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief.” In <i>Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management</i>, 2018.","ieee":"G. Rauchecker and G. Schryen, “Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief,” in <i>Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management</i>, Rochester, NY, USA, 2018.","ama":"Rauchecker G, Schryen G. Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief. In: <i>Proceedings of the 15th International Conference on Information Systems for Crisis Response and Management</i>. ; 2018."},"year":"2018","has_accepted_license":"1","conference":{"location":"Rochester, NY, USA","name":"15th International Conference on Information Systems for Crisis Response and Management"},"title":"Decision Support for the Optimal Coordination of Spontaneous Volunteers in Disaster Relief","date_created":"2018-11-14T15:35:54Z","author":[{"full_name":"Rauchecker, Gerhard","last_name":"Rauchecker","first_name":"Gerhard"},{"first_name":"Guido","id":"72850","full_name":"Schryen, Guido","last_name":"Schryen"}],"date_updated":"2022-01-06T07:02:28Z","oa":"1"},{"publication":"International Journal of Solids and Structures","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"Bainite is a steel microstructure consisting of three phases, bainitic ferrite, austenite and carbides. It forms in two different morphologies, upper and lower bainite, where different diffusion mechanisms are dominant. The aim of this work is to simulate both transformations within a unified model. To this end, we extend an own previously published model for lower bainite with diffusion across the phase interface. As a central idea we introduce weighted Helmholtz energy functions and a weighted mobility tensor, respectively. The individual Helmholtz energy functions and mobility terms are related to the different diffusion mechanisms which are responsible for the formation of both morphologies. Two representative examples illustrate the capability of the coupled phase field/diffusion model and show the expected behaviour."}],"department":[{"_id":"154"}],"user_id":"78813","_id":"9899","language":[{"iso":"eng"}],"keyword":["Coupled phase field/diffusion model","Bainite","Multiphase field method","Cahn–Hilliard diffusion","Diffusion across the interface","Lower bainitic transformation","Upper bainitic transformation","Thermodynamic framework","Microforce balance"],"publication_identifier":{"issn":["0020-7683"]},"publication_status":"published","page":"172-183","intvolume":"       135","citation":{"ama":"Düsing M, Mahnken R. „A coupled phase field/diffusion model for upper and lower bainitic transformation”. <i>International Journal of Solids and Structures</i>. 2018;135:172-183.","ieee":"M. Düsing and R. Mahnken, “„A coupled phase field/diffusion model for upper and lower bainitic transformation”,” <i>International Journal of Solids and Structures</i>, vol. 135, pp. 172–183, 2018.","chicago":"Düsing, M., and R. Mahnken. “„A Coupled Phase Field/Diffusion Model for Upper and Lower Bainitic Transformation”.” <i>International Journal of Solids and Structures</i> 135 (2018): 172–83.","mla":"Düsing, M., and R. Mahnken. “„A Coupled Phase Field/Diffusion Model for Upper and Lower Bainitic Transformation”.” <i>International Journal of Solids and Structures</i>, vol. 135, Elsevier, 2018, pp. 172–83.","bibtex":"@article{Düsing_Mahnken_2018, title={„A coupled phase field/diffusion model for upper and lower bainitic transformation”}, volume={135}, journal={International Journal of Solids and Structures}, publisher={Elsevier}, author={Düsing, M. and Mahnken, R.}, year={2018}, pages={172–183} }","short":"M. Düsing, R. Mahnken, International Journal of Solids and Structures 135 (2018) 172–183.","apa":"Düsing, M., &#38; Mahnken, R. (2018). „A coupled phase field/diffusion model for upper and lower bainitic transformation”. <i>International Journal of Solids and Structures</i>, <i>135</i>, 172–183."},"year":"2018","volume":135,"author":[{"first_name":"M.","full_name":"Düsing, M.","last_name":"Düsing"},{"full_name":"Mahnken, R.","last_name":"Mahnken","first_name":"R."}],"date_created":"2019-05-21T13:03:05Z","date_updated":"2019-05-21T13:12:27Z","publisher":"Elsevier","title":"„A coupled phase field/diffusion model for upper and lower bainitic transformation”"},{"status":"public","abstract":[{"lang":"eng","text":"Ultrasonic wire bonding is an indispensable process in the industrial manufacturing of semiconductor devices. Copper wire is increasingly replacing the well-established aluminium wire because of its superior electrical, thermal and mechanical properties. Copper wire processes differ significantly from aluminium processes and are more sensitive to disturbances, which reduces the range of parameter values suitable for a stable process. Disturbances can be compensated by an adaption of process parameters, but finding suitable parameters manually is difficult and time-consuming. This paper presents a physical model of the ultrasonic wire bonding process including the friction contact between tool and wire. This model yields novel insights into the process. A prototype of a multi-objective optimizing bonding machine (MOBM) is presented. It uses multi-objective optimization, based on the complete process model, to automatically select the best operating point as a compromise of concurrent objectives."}],"publication":"In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018","type":"conference","language":[{"iso":"eng"}],"keyword":["wire bonding","multi-objective optimization","process model","copper wire","self-optimization"],"department":[{"_id":"151"}],"user_id":"210","_id":"9999","project":[{"_id":"92","name":"Intelligente Herstellung zuverlässiger Kupferbondverbindungen","grant_number":"02 PQ2210"}],"citation":{"ieee":"A. Unger, M. Hunstig, T. Meyer, M. Brökelmann, and W. Sextro, “Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and Challenges,” in <i>In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018</i>, 2018, vol. Vol. 2018, No. 1, pp. 000572-000577.","chicago":"Unger, Andreas, Matthias Hunstig, Tobias Meyer, Michael Brökelmann, and Walter Sextro. “Intelligent Production of Wire Bonds Using Multi-Objective Optimization – Insights, Opportunities and Challenges.” In <i>In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018</i>, Vol. Vol. 2018, No. 1, pp. 000572-000577., 2018. <a href=\"https://doi.org/10.4071/2380-4505-2018.1.000572\">https://doi.org/10.4071/2380-4505-2018.1.000572</a>.","ama":"Unger A, Hunstig M, Meyer T, Brökelmann M, Sextro W. Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and Challenges. In: <i>In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018</i>. Vol Vol. 2018, No. 1, pp. 000572-000577. ; 2018. doi:<a href=\"https://doi.org/10.4071/2380-4505-2018.1.000572\">10.4071/2380-4505-2018.1.000572</a>","mla":"Unger, Andreas, et al. “Intelligent Production of Wire Bonds Using Multi-Objective Optimization – Insights, Opportunities and Challenges.” <i>In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018</i>, vol. Vol. 2018, No. 1, pp. 000572-000577., 2018, doi:<a href=\"https://doi.org/10.4071/2380-4505-2018.1.000572\">10.4071/2380-4505-2018.1.000572</a>.","bibtex":"@inproceedings{Unger_Hunstig_Meyer_Brökelmann_Sextro_2018, title={Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and Challenges}, volume={Vol. 2018, No. 1, pp. 000572-000577.}, DOI={<a href=\"https://doi.org/10.4071/2380-4505-2018.1.000572\">10.4071/2380-4505-2018.1.000572</a>}, booktitle={In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018}, author={Unger, Andreas and Hunstig, Matthias and Meyer, Tobias and Brökelmann, Michael and Sextro, Walter}, year={2018} }","short":"A. Unger, M. Hunstig, T. Meyer, M. Brökelmann, W. Sextro, in: In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018, 2018.","apa":"Unger, A., Hunstig, M., Meyer, T., Brökelmann, M., &#38; Sextro, W. (2018). Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and Challenges. In <i>In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018</i> (Vol. Vol. 2018, No. 1, pp. 000572-000577.). <a href=\"https://doi.org/10.4071/2380-4505-2018.1.000572\">https://doi.org/10.4071/2380-4505-2018.1.000572</a>"},"year":"2018","quality_controlled":"1","doi":"10.4071/2380-4505-2018.1.000572","title":"Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and Challenges","volume":"Vol. 2018, No. 1, pp. 000572-000577.","date_created":"2019-05-27T10:27:45Z","author":[{"first_name":"Andreas","full_name":"Unger, Andreas","last_name":"Unger"},{"last_name":"Hunstig","full_name":"Hunstig, Matthias","first_name":"Matthias"},{"full_name":"Meyer, Tobias","last_name":"Meyer","first_name":"Tobias"},{"first_name":"Michael","last_name":"Brökelmann","full_name":"Brökelmann, Michael"},{"last_name":"Sextro","full_name":"Sextro, Walter","id":"21220","first_name":"Walter"}],"date_updated":"2020-05-07T05:33:56Z"},{"has_accepted_license":"1","quality_controlled":"1","year":"2018","citation":{"bibtex":"@inproceedings{Weiß_Ilona_Berscheid_Fischer_Tröster_2018, title={NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH}, DOI={<a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>}, author={Weiß, Borkowski and Ilona, Horwath and Berscheid, Anna lena and Fischer, Silvia Dohmeier and Tröster, Thomas}, year={2018} }","mla":"Weiß, Borkowski, et al. <i>NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH</i>. 2018, doi:<a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>.","short":"B. Weiß, H. Ilona, A. lena Berscheid, S.D. Fischer, T. Tröster, in: 2018.","apa":"Weiß, B., Ilona, H., Berscheid, A. lena, Fischer, S. D., &#38; Tröster, T. (2018). <i>NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH</i>. Proceedings of INTED2018 Conference, Valencia, Spain. <a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>","chicago":"Weiß, Borkowski, Horwath Ilona, Anna lena Berscheid, Silvia Dohmeier Fischer, and Thomas Tröster. “NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH,” 2018. <a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>.","ieee":"B. Weiß, H. Ilona, A. lena Berscheid, S. D. Fischer, and T. Tröster, “NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH,” presented at the Proceedings of INTED2018 Conference, Valencia, Spain, 2018, doi: <a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>.","ama":"Weiß B, Ilona H, Berscheid A lena, Fischer SD, Tröster T. NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH. In: ; 2018. doi:<a href=\"https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)\">Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)</a>"},"date_updated":"2022-04-20T09:15:12Z","author":[{"first_name":"Borkowski","last_name":"Weiß","full_name":"Weiß, Borkowski"},{"first_name":"Horwath","full_name":"Ilona, Horwath","last_name":"Ilona"},{"last_name":"Berscheid","full_name":"Berscheid, Anna lena","first_name":"Anna lena"},{"first_name":"Silvia Dohmeier","full_name":"Fischer, Silvia Dohmeier","last_name":"Fischer"},{"first_name":"Thomas","full_name":"Tröster, Thomas","last_name":"Tröster"}],"date_created":"2021-09-14T14:43:12Z","title":"NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH","conference":{"end_date":"2018-03-07","location":"Valencia, Spain","name":"Proceedings of INTED2018 Conference","start_date":"2018-03-05"},"doi":"Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)","type":"conference","abstract":[{"lang":"eng","text":"In the field of lightweight design by composites, the V-Model forms the basis of inter- and\r\ntransdisciplinary collaboration and research of 13 doctoral students from different disciplines, i. e.\r\nengineering, sciences and social sciences. The technological challenges of the research college itself\r\nand the V-Model as an approach for addressing these challenges are introduced. Within the\r\ncooperation of the young researchers, a technology demonstrator was produced. On the one hand this\r\ncan be seen as demonstrator for the different technologies which are addressed by individual research\r\nand on the other hand for the interdisciplinary collaboration itself. Exemplary, this technology\r\ndemonstrator is presented as one result of the research group and the challenges of the\r\ninterdisciplinary collaboration while producing it are pointed out."}],"status":"public","file":[{"content_type":"application/pdf","relation":"main_file","success":1,"date_created":"2021-09-14T21:34:56Z","creator":"innem","date_updated":"2021-09-14T21:34:56Z","file_id":"24470","file_name":"Weiss_etal_2018.pdf","access_level":"closed","file_size":517765}],"_id":"24395","department":[{"_id":"603"}],"user_id":"83744","keyword":["Lightweight Design","Composites","Interdisciplinarity","Transdisciplinarity","V-Model."],"ddc":["620"],"language":[{"iso":"eng"}],"file_date_updated":"2021-09-14T21:34:56Z"},{"publication":"Learning and Individual Differences","abstract":[{"text":"Ample empirical research from regular school settings documents reciprocal effects between academic performance and academic self-concept of ability (ASC), supporting what is known as a reciprocal effects model (REM). The present article investigates a REM in the domain of reading performance in a sample of elementary students with special educational needs in learning (SEN-L) who received special educational support in exclusive versus inclusive settings (N = 446). In exclusive settings, SEN-L students attend special schools and are completely separated from regular students. By contrast, SEN-L students in inclusive settings attend regular schools and are educated in classes with regular students. In both settings, SEN-L students are not graded and taught based on individual learning goals, which may affect reciprocal effects between ASC and reading performance. In addition, given that special education for SEN-L students relies heavily on individual reference standards to evaluate performance, we tested individual performance growth of SEN-L students as a predictor of ASC. Analyses of a longitudinal dataset across 3rd and 4th grade revealed some cross-lagged effects and an effect of performance growth on ASC in exclusive settings in particular. The discussion focuses on the role of individualized instruction, grades, peer groups, and individual versus social reference standards for reciprocal effects between ASC and performance as well as practical implications.\r\n","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["BiLieF","Special educational needs","Learning disability","Academic selfconcept of ability","Reciprocal effects model","Inclusive education"],"year":"2018","date_created":"2022-12-17T13:20:47Z","publisher":"Elsevier BV","title":"Reciprocal effects between self-concept of ability and performance: A longitudinal study of children with learning disabilities in inclusive versus exclusive elementary education","type":"journal_article","status":"public","user_id":"95559","department":[{"_id":"479"}],"_id":"34498","extern":"1","publication_status":"published","publication_identifier":{"issn":["1041-6080"]},"citation":{"ieee":"J. Gorges, P. Neumann, E. Wild, D. Stranghöner, and B. Lütje-Klose, “Reciprocal effects between self-concept of ability and performance: A longitudinal study of children with learning disabilities in inclusive versus exclusive elementary education,” <i>Learning and Individual Differences</i>, vol. 61, pp. 11–20, 2018, doi: <a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">10.1016/j.lindif.2017.11.005</a>.","chicago":"Gorges, Julia, Phillip Neumann, Elke Wild, Daniela Stranghöner, and Birgit Lütje-Klose. “Reciprocal Effects between Self-Concept of Ability and Performance: A Longitudinal Study of Children with Learning Disabilities in Inclusive versus Exclusive Elementary Education.” <i>Learning and Individual Differences</i> 61 (2018): 11–20. <a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">https://doi.org/10.1016/j.lindif.2017.11.005</a>.","ama":"Gorges J, Neumann P, Wild E, Stranghöner D, Lütje-Klose B. Reciprocal effects between self-concept of ability and performance: A longitudinal study of children with learning disabilities in inclusive versus exclusive elementary education. <i>Learning and Individual Differences</i>. 2018;61:11-20. doi:<a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">10.1016/j.lindif.2017.11.005</a>","apa":"Gorges, J., Neumann, P., Wild, E., Stranghöner, D., &#38; Lütje-Klose, B. (2018). Reciprocal effects between self-concept of ability and performance: A longitudinal study of children with learning disabilities in inclusive versus exclusive elementary education. <i>Learning and Individual Differences</i>, <i>61</i>, 11–20. <a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">https://doi.org/10.1016/j.lindif.2017.11.005</a>","bibtex":"@article{Gorges_Neumann_Wild_Stranghöner_Lütje-Klose_2018, title={Reciprocal effects between self-concept of ability and performance: A longitudinal study of children with learning disabilities in inclusive versus exclusive elementary education}, volume={61}, DOI={<a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">10.1016/j.lindif.2017.11.005</a>}, journal={Learning and Individual Differences}, publisher={Elsevier BV}, author={Gorges, Julia and Neumann, Phillip and Wild, Elke and Stranghöner, Daniela and Lütje-Klose, Birgit}, year={2018}, pages={11–20} }","short":"J. Gorges, P. Neumann, E. Wild, D. Stranghöner, B. Lütje-Klose, Learning and Individual Differences 61 (2018) 11–20.","mla":"Gorges, Julia, et al. “Reciprocal Effects between Self-Concept of Ability and Performance: A Longitudinal Study of Children with Learning Disabilities in Inclusive versus Exclusive Elementary Education.” <i>Learning and Individual Differences</i>, vol. 61, Elsevier BV, 2018, pp. 11–20, doi:<a href=\"https://doi.org/10.1016/j.lindif.2017.11.005\">10.1016/j.lindif.2017.11.005</a>."},"intvolume":"        61","page":"11-20","author":[{"first_name":"Julia","last_name":"Gorges","full_name":"Gorges, Julia"},{"first_name":"Phillip","id":"95559","full_name":"Neumann, Phillip","last_name":"Neumann"},{"first_name":"Elke","last_name":"Wild","full_name":"Wild, Elke"},{"last_name":"Stranghöner","full_name":"Stranghöner, Daniela","first_name":"Daniela"},{"full_name":"Lütje-Klose, Birgit","last_name":"Lütje-Klose","first_name":"Birgit"}],"volume":61,"oa":"1","date_updated":"2023-01-10T19:42:56Z","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S1041608017302030"}],"doi":"10.1016/j.lindif.2017.11.005"},{"date_updated":"2019-09-16T10:20:49Z","author":[{"first_name":"Thorben","last_name":"Kaul","id":"14802","full_name":"Kaul, Thorben"},{"first_name":"Tobias","last_name":"Meyer","full_name":"Meyer, Tobias"},{"last_name":"Sextro","full_name":"Sextro, Walter","id":"21220","first_name":"Walter"}],"date_created":"2019-05-27T09:37:46Z","volume":"Vol. 231(4)","title":"Formulation of reliability-related objective functions for design of intelligent mechatronic systems","doi":"10.1177/1748006X17709376","quality_controlled":"1","year":"2017","citation":{"bibtex":"@article{Kaul_Meyer_Sextro_2017, title={Formulation of reliability-related objective functions for design of intelligent mechatronic systems}, volume={Vol. 231(4)}, DOI={<a href=\"https://doi.org/10.1177/1748006X17709376\">10.1177/1748006X17709376</a>}, journal={SAGE Journals}, author={Kaul, Thorben and Meyer, Tobias and Sextro, Walter}, year={2017}, pages={390–399} }","mla":"Kaul, Thorben, et al. “Formulation of Reliability-Related Objective Functions for Design of Intelligent Mechatronic Systems.” <i>SAGE Journals</i>, vol. Vol. 231(4), 2017, pp. 390–99, doi:<a href=\"https://doi.org/10.1177/1748006X17709376\">10.1177/1748006X17709376</a>.","short":"T. Kaul, T. Meyer, W. Sextro, SAGE Journals Vol. 231(4) (2017) 390–399.","apa":"Kaul, T., Meyer, T., &#38; Sextro, W. (2017). Formulation of reliability-related objective functions for design of intelligent mechatronic systems. <i>SAGE Journals</i>, <i>Vol. 231(4)</i>, 390–399. <a href=\"https://doi.org/10.1177/1748006X17709376\">https://doi.org/10.1177/1748006X17709376</a>","ama":"Kaul T, Meyer T, Sextro W. Formulation of reliability-related objective functions for design of intelligent mechatronic systems. <i>SAGE Journals</i>. 2017;Vol. 231(4):390-399. doi:<a href=\"https://doi.org/10.1177/1748006X17709376\">10.1177/1748006X17709376</a>","ieee":"T. Kaul, T. Meyer, and W. Sextro, “Formulation of reliability-related objective functions for design of intelligent mechatronic systems,” <i>SAGE Journals</i>, vol. Vol. 231(4), pp. 390–399, 2017.","chicago":"Kaul, Thorben, Tobias Meyer, and Walter Sextro. “Formulation of Reliability-Related Objective Functions for Design of Intelligent Mechatronic Systems.” <i>SAGE Journals</i> Vol. 231(4) (2017): 390–99. <a href=\"https://doi.org/10.1177/1748006X17709376\">https://doi.org/10.1177/1748006X17709376</a>."},"page":"390 - 399","_id":"9976","user_id":"55222","department":[{"_id":"151"}],"keyword":["Integrated model","reliability","system behavior","Bayesian network","multiobjective optimization"],"language":[{"iso":"eng"}],"type":"journal_article","publication":"SAGE Journals","abstract":[{"text":"State-of-the-art mechatronic systems offer inherent intelligence that enables them to autonomously adapt their behavior to current environmental conditions and to their own system state. This autonomous behavior adaptation is made possible by software in combination with complex sensor and actuator systems and by sophisticated information processing, all of which make these systems increasingly complex. This increasing complexity makes the design process a challenging task and brings new complex possibilities for operation and maintenance. However, with the risk of increased system complexity also comes the chance to adapt system behavior based on current reliability, which in turn increases reliability. The development of such an adaption strategy requires appropriate methods to evaluate reliability based on currently selected system behavior. A common approach to implement such adaptivity is to base system behavior on different working points that are obtained using multiobjective optimization. During operation, selection among these allows a changed operating strategy. To allow for multiobjective optimization, an accurate system model including system reliability is required. This model is repeatedly evaluated by the optimization algorithm. At present, modeling of system reliability and synchronization of the models of behavior and reliability is a laborious manual task and thus very error-prone. Since system behavior is crucial for system reliability, an integrated model is introduced that integrates system behavior and system reliability. The proposed approach is used to formulate reliability-related objective functions for a clutch test rig that are used to compute feasible working points using multiobjective optimization.","lang":"eng"}],"status":"public"},{"doi":"10.1007/s10734-016-0095-8","title":"The crucial first year: a longitudinal study of students’ motivational development at a Swiss Business School","date_created":"2018-09-18T08:58:54Z","author":[{"last_name":"Brahm","full_name":"Brahm, Taiga","first_name":"Taiga"},{"first_name":"Tobias","full_name":"Jenert, Tobias","last_name":"Jenert"},{"last_name":"Wagner","full_name":"Wagner, Dietrich","first_name":"Dietrich"}],"volume":73,"publisher":"Springer Nature","date_updated":"2022-01-06T07:01:03Z","citation":{"short":"T. Brahm, T. Jenert, D. Wagner, Higher Education 73 (2016) 459–478.","mla":"Brahm, Taiga, et al. “The Crucial First Year: A Longitudinal Study of Students’ Motivational Development at a Swiss Business School.” <i>Higher Education</i>, vol. 73, no. 3, Springer Nature, 2016, pp. 459–78, doi:<a href=\"https://doi.org/10.1007/s10734-016-0095-8\">10.1007/s10734-016-0095-8</a>.","bibtex":"@article{Brahm_Jenert_Wagner_2016, title={The crucial first year: a longitudinal study of students’ motivational development at a Swiss Business School}, volume={73}, DOI={<a href=\"https://doi.org/10.1007/s10734-016-0095-8\">10.1007/s10734-016-0095-8</a>}, number={3}, journal={Higher Education}, publisher={Springer Nature}, author={Brahm, Taiga and Jenert, Tobias and Wagner, Dietrich}, year={2016}, pages={459–478} }","apa":"Brahm, T., Jenert, T., &#38; Wagner, D. (2016). The crucial first year: a longitudinal study of students’ motivational development at a Swiss Business School. <i>Higher Education</i>, <i>73</i>(3), 459–478. <a href=\"https://doi.org/10.1007/s10734-016-0095-8\">https://doi.org/10.1007/s10734-016-0095-8</a>","ama":"Brahm T, Jenert T, Wagner D. The crucial first year: a longitudinal study of students’ motivational development at a Swiss Business School. <i>Higher Education</i>. 2016;73(3):459-478. doi:<a href=\"https://doi.org/10.1007/s10734-016-0095-8\">10.1007/s10734-016-0095-8</a>","chicago":"Brahm, Taiga, Tobias Jenert, and Dietrich Wagner. “The Crucial First Year: A Longitudinal Study of Students’ Motivational Development at a Swiss Business School.” <i>Higher Education</i> 73, no. 3 (2016): 459–78. <a href=\"https://doi.org/10.1007/s10734-016-0095-8\">https://doi.org/10.1007/s10734-016-0095-8</a>.","ieee":"T. Brahm, T. Jenert, and D. Wagner, “The crucial first year: a longitudinal study of students’ motivational development at a Swiss Business School,” <i>Higher Education</i>, vol. 73, no. 3, pp. 459–478, 2016."},"intvolume":"        73","page":"459-478","year":"2016","issue":"3","publication_status":"published","publication_identifier":{"issn":["0018-1560","1573-174X"]},"extern":"1","keyword":["Transition to higher education","Motivation","Longitudinal study","Socio-cultural factors","Latent change model","Switzerland"],"user_id":"51057","department":[{"_id":"208"},{"_id":"282"}],"_id":"4421","status":"public","abstract":[{"lang":"eng","text":"In Switzerland, every student graduating from grammar school can begin to study at a university. This leads to high dropout rates. Although students’ motivation is considered a strong predictor of performance, the development of motivation during students’ transition from high school to university has rarely been investigated. Additionally, little is known about the relation of motivational aspects with other influences on study performance. The present longitudinal study addresses this research gap and examines the development of economics and management students’ study motivation. It encompasses four waves of data collected throughout the first year, using quantitative online surveys. In total, the sample consists of 820 students. Data is analysed using latent change modelling. Results indicate that students start at a higher level of intrinsic motivation compared to extrinsic motivation. The variability of the starting value of the two constructs is also differing. The analysis also shows a gradual decline in students’ motivation. Above all, the transition from secondary to higher education seems to be a driver for this decline."}],"type":"journal_article","publication":"Higher Education"},{"title":"Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS","date_updated":"2019-05-27T09:13:54Z","author":[{"full_name":"Kohl, Sergej","last_name":"Kohl","first_name":"Sergej"},{"first_name":"Walter","id":"21220","full_name":"Sextro, Walter","last_name":"Sextro"},{"first_name":"Sebastian","last_name":"Schulze","full_name":"Schulze, Sebastian"}],"date_created":"2019-05-27T09:13:14Z","place":"Cyberjaya, Malaysia, 2016","year":"2016","page":"1-12","citation":{"ama":"Kohl S, Sextro W, Schulze S. Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS. In: <i>The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.</i> Cyberjaya, Malaysia, 2016; 2016:1-12.","chicago":"Kohl, Sergej, Walter Sextro, and Sebastian Schulze. “Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis Using ADAMS.” In <i>The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.</i>, 1–12. Cyberjaya, Malaysia, 2016, 2016.","ieee":"S. Kohl, W. Sextro, and S. Schulze, “Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS,” in <i>The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.</i>, 2016, pp. 1–12.","apa":"Kohl, S., Sextro, W., &#38; Schulze, S. (2016). Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS. In <i>The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.</i> (pp. 1–12). Cyberjaya, Malaysia, 2016.","bibtex":"@inproceedings{Kohl_Sextro_Schulze_2016, place={Cyberjaya, Malaysia, 2016}, title={Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS}, booktitle={The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.}, author={Kohl, Sergej and Sextro, Walter and Schulze, Sebastian}, year={2016}, pages={1–12} }","mla":"Kohl, Sergej, et al. “Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis Using ADAMS.” <i>The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.</i>, 2016, pp. 1–12.","short":"S. Kohl, W. Sextro, S. Schulze, in: The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016., Cyberjaya, Malaysia, 2016, 2016, pp. 1–12."},"keyword":["Kinematics and compliances","flexible viscoelastic suspension model","frictional rolling contact analysis","frictional power distribution."],"language":[{"iso":"eng"}],"_id":"9963","department":[{"_id":"151"}],"user_id":"55222","abstract":[{"lang":"eng","text":"Tire-wheel assembly is the only connection between road and vehicle. Contacting directly with road within postcard size of contact area, it is mounted and guided by the suspension system. Therefore kinematics and compliances of suspension system greatly influence the frictional coupling of tire tread elements and road surface asperities by affecting pressure and sliding velocity distribution in the contact zone. This study emphasizes the development of a numerical methodology for frictional rolling contact analysis with focus on interaction of suspension system dynamics and tire-road contact using ADAMS. For this purpose a comprehensive flexible multibody system of the multi-link rear suspension is established, where both flexible and rigid bodies are modeled to allow large displacements with included elastic effects. To meet accuracy requirements for the high frequency applications, such as road excitations, the amplitude- and frequency-dependency of rubber-metal bushings is included. Furthermore the proposed flexible viscoelastic suspension model is enhanced by a Flexible Ring Tire Model (FTire), which describes a 3D tire dynamic response and covers any road excitations by tread submodel connected to road surface model. Concerning the verification and validation procedure numerous experiments are carried out to confirm the validity and the accuracy of both the developed submodels and the entire model. The devised approach makes it possible to investigate the influence of suspension system design on dynamical rolling contact and to evaluate tire tread wear. Therefore it can be a useful tool to predict frictional power distribution within the contact area under more realistic conditions."}],"status":"public","publication":"The 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.","type":"conference"},{"language":[{"iso":"eng"}],"keyword":["model reduction","modal description","flexible multibody systems"],"department":[{"_id":"151"}],"user_id":"55222","_id":"9967","status":"public","abstract":[{"text":"Multibody models of mechatronic systems are usually interdisciplinary and are continuously gaining complexity, due to a growing demand for comprehensive models of systems including effects of electro mechanics, elastic bodies, contacts and friction. To be capable of simulating large models with subassemblies and contact between bodies, reduction techniques are required, which need certain experience in the choice of parameters. This publication discusses different possibilities for the modal description of structures in flexible multibody models with application to an Adaptive Frontlighting System in ADAMS. It will be shown that mode count, assembling of structures before and after modal reduction and influence of damping parameters of particular structures and subassemblies affect the behavior of the entire system. A common reduction technique for flexible structures in multibody models is the component mode synthesis, which uses a certain number of modes for description of the modal behavior of a structure. The influence of the mode count will be shown by means of different modal descriptions of one structure that contributes to a comprehensive model. Another study will prove that modal data of subassemblies and assemblies of modal reduced single structures lead to different models. The definition of damping parameters depends on the number of structures that have been added to an assembly before modal reduction and on the number of modal reduced structures. The comparison of subassemblies and the entire model to experimental data will highlight the accuracy, computational overhead, complexity of models and modeling efficiency of the comprehensive model for the frontlighting system.","lang":"eng"}],"publication":"2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016","type":"conference","title":"Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems","author":[{"first_name":"Sebastian","last_name":"Schulze","full_name":"Schulze, Sebastian"},{"first_name":"Walter","id":"21220","full_name":"Sextro, Walter","last_name":"Sextro"},{"last_name":"Kohl","full_name":"Kohl, Sergej","first_name":"Sergej"}],"date_created":"2019-05-27T09:19:20Z","date_updated":"2019-05-27T09:19:49Z","page":"1-11","citation":{"apa":"Schulze, S., Sextro, W., &#38; Kohl, S. (2016). Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems. In <i>2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016</i> (pp. 1–11).","bibtex":"@inproceedings{Schulze_Sextro_Kohl_2016, title={Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems}, booktitle={2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016}, author={Schulze, Sebastian and Sextro, Walter and Kohl, Sergej}, year={2016}, pages={1–11} }","mla":"Schulze, Sebastian, et al. “Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems.” <i>2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016</i>, 2016, pp. 1–11.","short":"S. Schulze, W. Sextro, S. Kohl, in: 2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016, 2016, pp. 1–11.","ama":"Schulze S, Sextro W, Kohl S. Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems. In: <i>2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016</i>. ; 2016:1-11.","ieee":"S. Schulze, W. Sextro, and S. Kohl, “Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems,” in <i>2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016</i>, 2016, pp. 1–11.","chicago":"Schulze, Sebastian, Walter Sextro, and Sergej Kohl. “Using Adequate Reduced Models for Flexible Multibody Systems of Automotive Mechatronic Systems.” In <i>2nd International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016</i>, 1–11, 2016."},"year":"2016"},{"status":"public","abstract":[{"lang":"eng","text":"The majority of algorithms can be controlled or adjusted by parameters. Their values can substantially affect the algorithms’ performance. Since the manual exploration of the parameter space is tedious – even for few parameters – several automatic procedures for parameter tuning have been proposed. Recent approaches also take into account some characteristic properties of the problem instances, frequently termed instance features. Our contribution is the proposal of a novel concept for feature-based algorithm parameter tuning, which applies an approximating surrogate model for learning the continuous feature-parameter mapping. To accomplish this, we learn a joint model of the algorithm performance based on both the algorithm parameters and the instance features. The required data is gathered using a recently proposed acquisition function for model refinement in surrogate-based optimization: the profile expected improvement. This function provides an avenue for maximizing the information required for the feature-parameter mapping, i.e., the mapping from instance features to the corresponding optimal algorithm parameters. The approach is validated by applying the tuner to exemplary evolutionary algorithms and problems, for which theoretically grounded or heuristically determined feature-parameter mappings are available."}],"publication":"Proceedings of the Genetic and Evolutionary Computation Conference","type":"conference","language":[{"iso":"eng"}],"extern":"1","keyword":["evolutionary algorithms","model-based optimization","parameter tuning"],"department":[{"_id":"819"}],"series_title":"GECCO ’15","user_id":"102979","_id":"48838","page":"1319–1326","citation":{"mla":"Bossek, Jakob, et al. “Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement.” <i>Proceedings of the Genetic and Evolutionary Computation Conference</i>, Association for Computing Machinery, 2015, pp. 1319–1326, doi:<a href=\"https://doi.org/10.1145/2739480.2754673\">10.1145/2739480.2754673</a>.","short":"J. Bossek, B. Bischl, T. Wagner, G. Rudolph, in: Proceedings of the Genetic and Evolutionary Computation Conference, Association for Computing Machinery, New York, NY, USA, 2015, pp. 1319–1326.","bibtex":"@inproceedings{Bossek_Bischl_Wagner_Rudolph_2015, place={New York, NY, USA}, series={GECCO ’15}, title={Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement}, DOI={<a href=\"https://doi.org/10.1145/2739480.2754673\">10.1145/2739480.2754673</a>}, booktitle={Proceedings of the Genetic and Evolutionary Computation Conference}, publisher={Association for Computing Machinery}, author={Bossek, Jakob and Bischl, Bernd and Wagner, Tobias and Rudolph, Günter}, year={2015}, pages={1319–1326}, collection={GECCO ’15} }","apa":"Bossek, J., Bischl, B., Wagner, T., &#38; Rudolph, G. (2015). Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement. <i>Proceedings of the Genetic and Evolutionary Computation Conference</i>, 1319–1326. <a href=\"https://doi.org/10.1145/2739480.2754673\">https://doi.org/10.1145/2739480.2754673</a>","chicago":"Bossek, Jakob, Bernd Bischl, Tobias Wagner, and Günter Rudolph. “Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement.” In <i>Proceedings of the Genetic and Evolutionary Computation Conference</i>, 1319–1326. GECCO ’15. New York, NY, USA: Association for Computing Machinery, 2015. <a href=\"https://doi.org/10.1145/2739480.2754673\">https://doi.org/10.1145/2739480.2754673</a>.","ieee":"J. Bossek, B. Bischl, T. Wagner, and G. Rudolph, “Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement,” in <i>Proceedings of the Genetic and Evolutionary Computation Conference</i>, 2015, pp. 1319–1326, doi: <a href=\"https://doi.org/10.1145/2739480.2754673\">10.1145/2739480.2754673</a>.","ama":"Bossek J, Bischl B, Wagner T, Rudolph G. Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement. In: <i>Proceedings of the Genetic and Evolutionary Computation Conference</i>. GECCO ’15. Association for Computing Machinery; 2015:1319–1326. doi:<a href=\"https://doi.org/10.1145/2739480.2754673\">10.1145/2739480.2754673</a>"},"place":"New York, NY, USA","year":"2015","publication_identifier":{"isbn":["978-1-4503-3472-3"]},"publication_status":"published","doi":"10.1145/2739480.2754673","title":"Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement","author":[{"id":"102979","full_name":"Bossek, Jakob","orcid":"0000-0002-4121-4668","last_name":"Bossek","first_name":"Jakob"},{"last_name":"Bischl","full_name":"Bischl, Bernd","first_name":"Bernd"},{"last_name":"Wagner","full_name":"Wagner, Tobias","first_name":"Tobias"},{"last_name":"Rudolph","full_name":"Rudolph, Günter","first_name":"Günter"}],"date_created":"2023-11-14T15:58:51Z","publisher":"Association for Computing Machinery","date_updated":"2023-12-13T10:40:30Z"},{"author":[{"last_name":"Weber","full_name":"Weber, Jens","first_name":"Jens"},{"first_name":"Cho","full_name":"Minhee, Cho","last_name":"Minhee"},{"first_name":"Mikyoung","last_name":"Lee","full_name":"Lee, Mikyoung"},{"last_name":"Song","full_name":"Song, Sa-kwang","first_name":"Sa-kwang"},{"full_name":"Geierhos, Michaela","id":"42496","last_name":"Geierhos","orcid":"0000-0002-8180-5606","first_name":"Michaela"},{"first_name":"Hanmin","last_name":"Jung","full_name":"Jung, Hanmin"}],"volume":1292,"oa":"1","date_updated":"2022-01-06T06:50:59Z","main_file_link":[{"url":"http://ceur-ws.org/Vol-1292/ipamin2014_paper1.pdf","open_access":"1"}],"conference":{"end_date":"2014-10-07","location":"Hildesheim, Germany","name":"First International Workshop on Patent Mining and Its Applications (IPaMin 2014)","start_date":"2014-10-06"},"publication_status":"published","publication_identifier":{"issn":["16130073"]},"citation":{"chicago":"Weber, Jens, Cho Minhee, Mikyoung Lee, Sa-kwang Song, Michaela Geierhos, and Hanmin Jung. “System Thinking: Crafting Scenarios for Prescriptive Analytics.” In <i>Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) Co-Located with Konvens 2014</i>, edited by Hanmin Jung, Thomas Mandl, Christa Womsen-Hacker, and Shuo Xu, Vol. 1292. CEUR Workshop Proceedings. CEUR-WS.org, 2014.","ieee":"J. Weber, C. Minhee, M. Lee, S. Song, M. Geierhos, and H. Jung, “System Thinking: Crafting Scenarios for Prescriptive Analytics,” in <i>Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located with Konvens 2014</i>, Hildesheim, Germany, 2014, vol. 1292.","ama":"Weber J, Minhee C, Lee M, Song S, Geierhos M, Jung H. System Thinking: Crafting Scenarios for Prescriptive Analytics. In: Jung H, Mandl T, Womsen-Hacker C, Xu S, eds. <i>Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) Co-Located with Konvens 2014</i>. Vol 1292. CEUR Workshop Proceedings. CEUR-WS.org; 2014.","mla":"Weber, Jens, et al. “System Thinking: Crafting Scenarios for Prescriptive Analytics.” <i>Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) Co-Located with Konvens 2014</i>, edited by Hanmin Jung et al., vol. 1292, CEUR-WS.org, 2014.","bibtex":"@inproceedings{Weber_Minhee_Lee_Song_Geierhos_Jung_2014, series={CEUR Workshop Proceedings}, title={System Thinking: Crafting Scenarios for Prescriptive Analytics}, volume={1292}, booktitle={Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located with Konvens 2014}, publisher={CEUR-WS.org}, author={Weber, Jens and Minhee, Cho and Lee, Mikyoung and Song, Sa-kwang and Geierhos, Michaela and Jung, Hanmin}, editor={Jung, Hanmin and Mandl, Thomas and Womsen-Hacker, Christa and Xu, ShuoEditors}, year={2014}, collection={CEUR Workshop Proceedings} }","short":"J. Weber, C. Minhee, M. Lee, S. Song, M. Geierhos, H. Jung, in: H. Jung, T. Mandl, C. Womsen-Hacker, S. Xu (Eds.), Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) Co-Located with Konvens 2014, CEUR-WS.org, 2014.","apa":"Weber, J., Minhee, C., Lee, M., Song, S., Geierhos, M., &#38; Jung, H. (2014). System Thinking: Crafting Scenarios for Prescriptive Analytics. In H. Jung, T. Mandl, C. Womsen-Hacker, &#38; S. Xu (Eds.), <i>Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located with Konvens 2014</i> (Vol. 1292). Hildesheim, Germany: CEUR-WS.org."},"intvolume":"      1292","series_title":"CEUR Workshop Proceedings","user_id":"42496","department":[{"_id":"36"},{"_id":"1"},{"_id":"579"}],"_id":"1134","type":"conference","status":"public","editor":[{"first_name":"Hanmin","full_name":"Jung, Hanmin","last_name":"Jung"},{"first_name":"Thomas","full_name":"Mandl, Thomas","last_name":"Mandl"},{"full_name":"Womsen-Hacker, Christa","last_name":"Womsen-Hacker","first_name":"Christa"},{"first_name":"Shuo","full_name":"Xu, Shuo","last_name":"Xu"}],"date_created":"2018-01-30T15:27:08Z","publisher":"CEUR-WS.org","title":"System Thinking: Crafting Scenarios for Prescriptive Analytics","quality_controlled":"1","year":"2014","language":[{"iso":"eng"}],"keyword":["Standardized Influential Factors","Prescriptive Analytics","Role Model Group","Scenario Technique"],"publication":"Proceedings of the First International Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located with Konvens 2014","abstract":[{"lang":"eng","text":"This paper focuses on the first step in combining prescriptive analytics with scenario techniques in order to provide strategicdevelopment after the useof InSciTe, a data prescriptive analytics application. InSciTe supports the improvement of researchers‘ individual performance by recommending new research directions. Standardized influential factors are presented as a foundation for automated scenario modelling such as the prototypical report generation function of InSciTe. Additionally, a use-case is shown which validatesthe potential of the standardized influential factors for raw scenario development."}]},{"_id":"4474","department":[{"_id":"208"},{"_id":"282"}],"user_id":"51057","keyword":["motivation","business school","higher education","latent growth curve model","longitudinal study","mixed methods","interview","students"],"extern":"1","type":"conference","abstract":[{"lang":"eng","text":"The transition from school to university can be overwhelming for some students. While students' motivation is considered a strong predictor of performance, the development of motivation during students' transition from high school to university has rarely been investigated. Additionally, little is known about the relation of motivational aspects with other influences on study performance. The present mixed methods study addresses this research gap and examines the development of economics students' study motivation. The longitudinal mixed-method study included three waves of data collected using quantitative surveys and a series of five interviews conducted with 14 first-year students over eight months. Regarding students' development over time, the quantitative analysis showed a gradual decline in students' motivation. However, in the interviews, certain events during the first year were identified as critical incidents demotivating students. These insights into the development of students' motivation at a business school show that concrete incidents influence students' motivational development; thus, they could be transformed by structural changes."}],"status":"public","date_updated":"2022-01-06T07:01:06Z","date_created":"2018-09-19T08:06:46Z","author":[{"first_name":"Taiga","full_name":"Brahm, Taiga","last_name":"Brahm"},{"first_name":"Tobias","last_name":"Jenert","orcid":" https://orcid.org/0000-0001-9262-5646","full_name":"Jenert, Tobias","id":"71994"}],"title":"The crucial first year: The development of students' motivation at a Business School-a Mixed Methods Study","conference":{"location":"Leuven","end_date":"2014-08-22","start_date":"2014-08-20","name":"SIG4 Higher Education & SIG17 Qualitative and Quantitative Approaches to Learning and Instruction Earli SIG Conference 2014"},"year":"2014","citation":{"ama":"Brahm T, Jenert T. The crucial first year: The development of students’ motivation at a Business School-a Mixed Methods Study. In: ; 2014.","chicago":"Brahm, Taiga, and Tobias Jenert. “The Crucial First Year: The Development of Students’ Motivation at a Business School-a Mixed Methods Study,” 2014.","ieee":"T. Brahm and T. Jenert, “The crucial first year: The development of students’ motivation at a Business School-a Mixed Methods Study,” presented at the SIG4 Higher Education &#38; SIG17 Qualitative and Quantitative Approaches to Learning and Instruction Earli SIG Conference 2014, Leuven, 2014.","apa":"Brahm, T., &#38; Jenert, T. (2014). The crucial first year: The development of students’ motivation at a Business School-a Mixed Methods Study. Presented at the SIG4 Higher Education &#38; SIG17 Qualitative and Quantitative Approaches to Learning and Instruction Earli SIG Conference 2014, Leuven.","short":"T. Brahm, T. Jenert, in: 2014.","mla":"Brahm, Taiga, and Tobias Jenert. <i>The Crucial First Year: The Development of Students’ Motivation at a Business School-a Mixed Methods Study</i>. 2014.","bibtex":"@inproceedings{Brahm_Jenert_2014, title={The crucial first year: The development of students’ motivation at a Business School-a Mixed Methods Study}, author={Brahm, Taiga and Jenert, Tobias}, year={2014} }"}},{"quality_controlled":"1","year":"2014","citation":{"ama":"Althoff S, Neuhaus J, Hemsel T, Sextro W. Improving the bond quality of copper wire bonds using a friction model approach. In: <i>Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th</i>. ; 2014:1549-1555. doi:<a href=\"https://doi.org/10.1109/ECTC.2014.6897500\">10.1109/ECTC.2014.6897500</a>","ieee":"S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “Improving the bond quality of copper wire bonds using a friction model approach,” in <i>Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th</i>, 2014, pp. 1549–1555.","chicago":"Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In <i>Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th</i>, 1549–55, 2014. <a href=\"https://doi.org/10.1109/ECTC.2014.6897500\">https://doi.org/10.1109/ECTC.2014.6897500</a>.","apa":"Althoff, S., Neuhaus, J., Hemsel, T., &#38; Sextro, W. (2014). Improving the bond quality of copper wire bonds using a friction model approach. In <i>Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th</i> (pp. 1549–1555). <a href=\"https://doi.org/10.1109/ECTC.2014.6897500\">https://doi.org/10.1109/ECTC.2014.6897500</a>","bibtex":"@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2014, title={Improving the bond quality of copper wire bonds using a friction model approach}, DOI={<a href=\"https://doi.org/10.1109/ECTC.2014.6897500\">10.1109/ECTC.2014.6897500</a>}, booktitle={Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th}, author={Althoff, Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter}, year={2014}, pages={1549–1555} }","short":"S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.","mla":"Althoff, Simon, et al. “Improving the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” <i>Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th</i>, 2014, pp. 1549–55, doi:<a href=\"https://doi.org/10.1109/ECTC.2014.6897500\">10.1109/ECTC.2014.6897500</a>."},"page":"1549-1555","date_updated":"2019-09-16T10:57:58Z","author":[{"last_name":"Althoff","full_name":"Althoff, Simon","first_name":"Simon"},{"last_name":"Neuhaus","full_name":"Neuhaus, Jan","first_name":"Jan"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"full_name":"Sextro, Walter","id":"21220","last_name":"Sextro","first_name":"Walter"}],"date_created":"2019-05-20T12:11:44Z","title":"Improving the bond quality of copper wire bonds using a friction model approach","doi":"10.1109/ECTC.2014.6897500","type":"conference","publication":"Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th","abstract":[{"lang":"eng","text":"In order to increase mechanical strength, heat dissipation and ampacity and to decrease failure through fatigue fracture, wedge copper wire bonding is being introduced as a standard interconnection method for mass production. To achieve the same process stability when using copper wire instead of aluminum wire a profound understanding of the bonding process is needed. Due to the higher hardness of copper compared to aluminum wire it is more difficult to approach the surfaces of wire and substrate to a level where van der Waals forces are able to arise between atoms. Also, enough friction energy referred to the total contact area has to be generated to activate the surfaces. Therefore, a friction model is used to simulate the joining process. This model calculates the resulting energy of partial areas in the contact surface and provides information about the adhesion process of each area. The focus here is on the arising of micro joints in the contact area depending on the location in the contact and time. To validate the model, different touchdown forces are used to vary the initial contact areas of wire and substrate. Additionally, a piezoelectric tri-axial force sensor is built up to identify the known phases of pre-deforming, cleaning, adhering and diffusing for the real bonding process to map with the model. Test substrates as DBC and copper plate are used to show the different formations of a wedge bond connection due to hardness and reaction propensity. The experiments were done by using 500 $\\mu$m copper wire and a standard V-groove tool."}],"status":"public","_id":"9868","user_id":"55222","department":[{"_id":"151"}],"keyword":["adhesion","circuit reliability","deformation","diffusion","fatigue cracks","friction","interconnections","lead bonding","van der Waals forces","Cu","adhering process","adhesion process","ampacity improvement","bond quality improvement","cleaning process","diffusing process","fatigue fracture failure","friction energy","friction model","heat dissipation","mechanical strength","piezoelectric triaxial force sensor","predeforming process","size 500 mum","total contact area","van der Waals forces","wedge copper wire bonding","Bonding","Copper","Finite element analysis","Force","Friction","Substrates","Wires"],"language":[{"iso":"eng"}]},{"publication":"Prognostics and Health Management (PHM), 2014 IEEE Conference on","type":"conference","status":"public","abstract":[{"lang":"eng","text":"Application of prognostics and health management (PHM) in the field of Proton Exchange Membrane (PEM) fuel cells is emerging as an important tool in increasing the reliability and availability of these systems. Though a lot of work is currently being conducted to develop PHM systems for fuel cells, various challenges have been encountered including the self-healing effect after characterization as well as accelerated degradation due to dynamic loading, all which make RUL predictions a difficult task. In this study, a prognostic approach based on adaptive particle filter algorithm is proposed. The novelty of the proposed method lies in the introduction of a self-healing factor after each characterization and the adaption of the degradation model parameters to fit to the changing degradation trend. An ensemble of five different state models based on weighted mean is then developed. The results show that the method is effective in estimating the remaining useful life of PEM fuel cells, with majority of the predictions falling within 5\\% error. The method was employed in the IEEE 2014 PHM Data Challenge and led to our team emerging the winner of the RUL category of the challenge."}],"department":[{"_id":"151"}],"user_id":"55222","_id":"9879","language":[{"iso":"eng"}],"keyword":["ageing","particle filtering (numerical methods)","proton exchange membrane fuel cells","remaining life assessment","PEM fuel cell prognostics","PHM","RUL predictions","accelerated degradation","adaptive particle filter algorithm","dynamic loading","model parameter adaptation","prognostics and health management","proton exchange membrane fuel cells","remaining useful life estimation","self-healing effect","Adaptation models","Data models","Degradation","Estimation","Fuel cells","Mathematical model","Prognostics and health management"],"page":"1-6","citation":{"short":"J.K. Kimotho, T. Meyer, W. Sextro, in: Prognostics and Health Management (PHM), 2014 IEEE Conference On, 2014, pp. 1–6.","bibtex":"@inproceedings{Kimotho_Meyer_Sextro_2014, title={PEM fuel cell prognostics using particle filter with model parameter adaptation}, DOI={<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>}, booktitle={Prognostics and Health Management (PHM), 2014 IEEE Conference on}, author={Kimotho, James Kuria  and Meyer, Tobias and Sextro, Walter}, year={2014}, pages={1–6} }","mla":"Kimotho, James Kuria, et al. “PEM Fuel Cell Prognostics Using Particle Filter with Model Parameter Adaptation.” <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>, 2014, pp. 1–6, doi:<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>.","apa":"Kimotho, J. K., Meyer, T., &#38; Sextro, W. (2014). PEM fuel cell prognostics using particle filter with model parameter adaptation. In <i>Prognostics and Health Management (PHM), 2014 IEEE Conference on</i> (pp. 1–6). <a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">https://doi.org/10.1109/ICPHM.2014.7036406</a>","ama":"Kimotho JK, Meyer T, Sextro W. PEM fuel cell prognostics using particle filter with model parameter adaptation. In: <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>. ; 2014:1-6. doi:<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>","ieee":"J. K. Kimotho, T. Meyer, and W. Sextro, “PEM fuel cell prognostics using particle filter with model parameter adaptation,” in <i>Prognostics and Health Management (PHM), 2014 IEEE Conference on</i>, 2014, pp. 1–6.","chicago":"Kimotho, James Kuria , Tobias Meyer, and Walter Sextro. “PEM Fuel Cell Prognostics Using Particle Filter with Model Parameter Adaptation.” In <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>, 1–6, 2014. <a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">https://doi.org/10.1109/ICPHM.2014.7036406</a>."},"year":"2014","author":[{"first_name":"James Kuria ","full_name":"Kimotho, James Kuria ","last_name":"Kimotho"},{"first_name":"Tobias","full_name":"Meyer, Tobias","last_name":"Meyer"},{"full_name":"Sextro, Walter","id":"21220","last_name":"Sextro","first_name":"Walter"}],"date_created":"2019-05-20T13:11:02Z","date_updated":"2019-05-20T13:12:27Z","doi":"10.1109/ICPHM.2014.7036406","title":"PEM fuel cell prognostics using particle filter with model parameter adaptation"},{"intvolume":"         5","citation":{"ama":"Kimotho JK, Sextro W. An approach for feature extraction and selection from non-trending data for machinery prognosis. In: <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>. Vol 5. ; 2014.","chicago":"Kimotho, James Kuria, and Walter Sextro. “An Approach for Feature Extraction and Selection from Non-Trending Data for Machinery Prognosis.” In <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, Vol. 5, 2014.","ieee":"J. K. Kimotho and W. Sextro, “An approach for feature extraction and selection from non-trending data for machinery prognosis,” in <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, 2014, vol. 5.","apa":"Kimotho, J. K., &#38; Sextro, W. (2014). An approach for feature extraction and selection from non-trending data for machinery prognosis. In <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i> (Vol. 5).","bibtex":"@inproceedings{Kimotho_Sextro_2014, title={An approach for feature extraction and selection from non-trending data for machinery prognosis}, volume={5}, booktitle={Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014}, author={Kimotho, James Kuria and Sextro, Walter}, year={2014} }","mla":"Kimotho, James Kuria, and Walter Sextro. “An Approach for Feature Extraction and Selection from Non-Trending Data for Machinery Prognosis.” <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, vol. 5, 2014.","short":"J.K. Kimotho, W. Sextro, in: Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014, 2014."},"year":"2014","quality_controlled":"1","title":"An approach for feature extraction and selection from non-trending data for machinery prognosis","volume":5,"author":[{"last_name":"Kimotho","full_name":"Kimotho, James Kuria","first_name":"James Kuria"},{"first_name":"Walter","full_name":"Sextro, Walter","id":"21220","last_name":"Sextro"}],"date_created":"2019-05-20T13:13:00Z","date_updated":"2019-09-16T10:37:35Z","status":"public","abstract":[{"text":"With the paradigm shift towards prognostic and health management (PHM) of machinery, there is need for reliable PHM methodologies with narrow error bounds to allow maintenance engineers take decisive maintenance actions based on the prognostic results. Prognostics is mainly concerned with the estimation of the remaining useful life (RUL) or time to failure (TTF). The accuracy of PHM methods is usually a function of the features extracted from the raw data obtained from sensors. In cases where the extracted features do not display clear degradation trends, for instance highly loaded bearings, the accuracy of the state of the art PHM methods is significantly affected. The data which lacks clear degradation trend is referred to as non-trending data. This study presents a method for extracting degradation trends from non-trending condition monitoring data for RUL estimation. The raw signals are first filtered using a discrete wavelet transform (DWT) denoising filter to remove noise from the acquired signals. Time domain, frequency domain and time-frequency domain features are then extracted from the filtered signals. An autoregressive model is then applied to the extracted features to identify the degradation trends. Features representing the maximum health information are then selected based on a performance evaluation criteria using extreme learning machine (ELM) algorithm. The selected features can then be used as inputs in a prognostic algorithm. The feasibility of the method is demonstrated using experimental bearing vibration data. The performance of the method is evaluated on the accuracy of RUL estimation and the results show that the method can be used to accurately estimate RUL with a maximum error of 10\\%.","lang":"eng"}],"publication":"Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014","type":"conference","language":[{"iso":"eng"}],"keyword":["autoregressive model ELM feature extraction feature selection non-trending Remaining useful Life"],"department":[{"_id":"151"}],"user_id":"55222","_id":"9880"},{"page":"289-294","citation":{"ama":"Unger A, Sextro W, Althoff S, et al. Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds. In: <i>Proceedings of the 47th International Symposium on Microelectronics (IMAPS)</i>. San Diego, CA, US; 2014:289-294.","chicago":"Unger, Andreas, Walter Sextro, Simon Althoff, Paul Eichwald, Tobias Meyer, Florian Eacock, and Michael Brökelmann. “Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds.” In <i>Proceedings of the 47th International Symposium on Microelectronics (IMAPS)</i>, 289–94. San Diego, CA, US, 2014.","ieee":"A. Unger <i>et al.</i>, “Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds,” in <i>Proceedings of the 47th International Symposium on Microelectronics (IMAPS)</i>, 2014, pp. 289–294.","bibtex":"@inproceedings{Unger_Sextro_Althoff_Eichwald_Meyer_Eacock_Brökelmann_2014, place={San Diego, CA, US}, title={Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds}, booktitle={Proceedings of the 47th International Symposium on Microelectronics (IMAPS)}, author={Unger, Andreas and Sextro, Walter and Althoff, Simon and Eichwald, Paul and Meyer, Tobias and Eacock, Florian and Brökelmann, Michael}, year={2014}, pages={289–294} }","mla":"Unger, Andreas, et al. “Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds.” <i>Proceedings of the 47th International Symposium on Microelectronics (IMAPS)</i>, 2014, pp. 289–94.","short":"A. Unger, W. Sextro, S. Althoff, P. Eichwald, T. Meyer, F. Eacock, M. Brökelmann, in: Proceedings of the 47th International Symposium on Microelectronics (IMAPS), San Diego, CA, US, 2014, pp. 289–294.","apa":"Unger, A., Sextro, W., Althoff, S., Eichwald, P., Meyer, T., Eacock, F., &#38; Brökelmann, M. (2014). Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds. In <i>Proceedings of the 47th International Symposium on Microelectronics (IMAPS)</i> (pp. 289–294). San Diego, CA, US."},"place":"San Diego, CA, US","year":"2014","title":"Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire Wedge Bonds","author":[{"first_name":"Andreas","full_name":"Unger, Andreas","last_name":"Unger"},{"first_name":"Walter","last_name":"Sextro","full_name":"Sextro, Walter","id":"21220"},{"full_name":"Althoff, Simon","last_name":"Althoff","first_name":"Simon"},{"last_name":"Eichwald","full_name":"Eichwald, Paul","first_name":"Paul"},{"first_name":"Tobias","full_name":"Meyer, Tobias","last_name":"Meyer"},{"full_name":"Eacock, Florian","last_name":"Eacock","first_name":"Florian"},{"first_name":"Michael","full_name":"Brökelmann, Michael","last_name":"Brökelmann"}],"date_created":"2019-05-20T13:35:09Z","date_updated":"2020-05-07T05:33:47Z","status":"public","abstract":[{"lang":"eng","text":"Power semiconductor modules are used to control and switch high electrical currents and voltages. Within the power module package wire bonding is used as an interconnection technology. In recent years, aluminum wire has been used preferably, but an ever-growing market of powerful and efficient power modules requires a material with better mechanical and electrical properties. For this reason, a technology change from aluminum to copper is indispensable. However, the copper wire bonding process reacts more sensitive to parameter changes. This makes manufacturing reliable copper bond connections a challenging task. The aim of the BMBF funded project Itsowl-InCuB is the development of self-optimizing techniques to enable the reliable production of copper bond connections under varying conditions. A model of the process is essential to achieve this aim. This model needs to include the dynamic elasto-plastic deformation, the ultrasonic softening effect and the proceeding adhesion between wire and substrate. This paper focusses on the pre-deformation process. In the touchdown phase, the wire is pressed into the V-groove of the tool and a small initial contact area between wire and substrate arise. The local characteristics of the material change abruptly because of the cold forming. Consequently, the pre-deformation has a strong effect on the joining process. In [1], a pre-cleaning effect during the touchdown process of aluminum wires by cracking of oxide layers was presented. These interactions of the process parameters are still largely unknown for copper. In a first step, this paper validates the importance of modeling the pre-deformation by showing its impact on the wire deformation characteristic experimentally. Creating cross-section views of pre-deformed copper wires has shown a low deformation degree compared to aluminum. By using a digital microscope and a scanning confocal microscope an analysis about the contact areas and penetration depths after touchdown has been made. Additionally, it has to be taken into account that the dynamical touchdown force depends on the touchdown speed and the touchdown force set in the bonding machine. In order to measure the overshoot in the force signals, a strain gauge sensor has been used. Subsequently, the affecting factors have been interpreted independently Furthermore, the material properties of copper wire have been investigated with tensile tests and hardness measurements. In a second step, the paper presents finite element models of the touchdown process for source and destination bonds. These models take the measured overshoot in the touchdown forces into account. A multi-linear, isotropic material model has been selected to map the material properties of the copper. A validation of the model with the experimental determined contact areas, normal pressures and penetration depths reveals the high model quality. Thus, the simulation is able to calculate and visualize the three dimensional pre-deformation with an integrated material parameter of the wire if the touchdown parameters of the bonding machine are known. Based on the calculated deformation degrees of wire and substrate, it is probably possible to investigate the effect of the pre-deformation on the pre-cleaning phase in the copper wire bonding."}],"publication":"Proceedings of the 47th International Symposium on Microelectronics (IMAPS)","type":"conference","language":[{"iso":"eng"}],"keyword":["pre-deformation","copper wire bonding","finite element model"],"department":[{"_id":"151"}],"user_id":"210","_id":"9895","project":[{"_id":"92","name":"Intelligente Herstellung zuverlässiger Kupferbondverbindungen","grant_number":"02 PQ2210"}]},{"language":[{"iso":"eng"}],"keyword":["Accuracy","Acoustics","Estimation","Mathematical model","Soruce separation","Speech","Vectors","Bayes methods","Blind source separation","Directional statistics","Number of speakers","Speaker diarization"],"user_id":"44006","department":[{"_id":"54"}],"_id":"11753","status":"public","abstract":[{"lang":"eng","text":"This contribution describes a step-wise source counting algorithm to determine the number of speakers in an offline scenario. Each speaker is identified by a variational expectation maximization (VEM) algorithm for complex Watson mixture models and therefore directly yields beamforming vectors for a subsequent speech separation process. An observation selection criterion is proposed which improves the robustness of the source counting in noise. The algorithm is compared to an alternative VEM approach with Gaussian mixture models based on directions of arrival and shown to deliver improved source counting accuracy. The article concludes by extending the offline algorithm towards a low-latency online estimation of the number of active sources from the streaming input data."}],"type":"conference","publication":"14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14.pdf","open_access":"1"}],"title":"Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models","date_created":"2019-07-12T05:27:35Z","author":[{"last_name":"Drude","id":"11213","full_name":"Drude, Lukas","first_name":"Lukas"},{"last_name":"Chinaev","full_name":"Chinaev, Aleksej","first_name":"Aleksej"},{"first_name":"Dang Hai","last_name":"Tran Vu","full_name":"Tran Vu, Dang Hai"},{"first_name":"Reinhold","last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold"}],"oa":"1","date_updated":"2022-01-06T06:51:08Z","citation":{"short":"L. Drude, A. Chinaev, D.H. Tran Vu, R. Haeb-Umbach, in: 14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014), 2014, pp. 213–217.","mla":"Drude, Lukas, et al. “Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models.” <i>14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)</i>, 2014, pp. 213–17.","bibtex":"@inproceedings{Drude_Chinaev_Tran Vu_Haeb-Umbach_2014, title={Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models}, booktitle={14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)}, author={Drude, Lukas and Chinaev, Aleksej and Tran Vu, Dang Hai and Haeb-Umbach, Reinhold}, year={2014}, pages={213–217} }","apa":"Drude, L., Chinaev, A., Tran Vu, D. H., &#38; Haeb-Umbach, R. (2014). Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models. In <i>14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)</i> (pp. 213–217).","ama":"Drude L, Chinaev A, Tran Vu DH, Haeb-Umbach R. Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models. In: <i>14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)</i>. ; 2014:213-217.","chicago":"Drude, Lukas, Aleksej Chinaev, Dang Hai Tran Vu, and Reinhold Haeb-Umbach. “Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models.” In <i>14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)</i>, 213–17, 2014.","ieee":"L. Drude, A. Chinaev, D. H. Tran Vu, and R. Haeb-Umbach, “Towards Online Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models,” in <i>14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)</i>, 2014, pp. 213–217."},"page":"213-217","year":"2014","related_material":{"link":[{"description":"Poster","relation":"supplementary_material","url":"https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14_Poster.pdf"}]}},{"abstract":[{"lang":"eng","text":"In this contribution we present a theoretical and experimental investigation into the effects of reverberation and noise on features in the logarithmic mel power spectral domain, an intermediate stage in the computation of the mel frequency cepstral coefficients, prevalent in automatic speech recognition (ASR). Gaining insight into the complex interaction between clean speech, noise, and noisy reverberant speech features is essential for any ASR system to be robust against noise and reverberation present in distant microphone input signals. The findings are gathered in a probabilistic formulation of an observation model which may be used in model-based feature compensation schemes. The proposed observation model extends previous models in three major directions: First, the contribution of additive background noise to the observation error is explicitly taken into account. Second, an energy compensation constant is introduced which ensures an unbiased estimate of the reverberant speech features, and, third, a recursive variant of the observation model is developed resulting in reduced computational complexity when used in model-based feature compensation. The experimental section is used to evaluate the accuracy of the model and to describe how its parameters can be determined from test data."}],"status":"public","type":"journal_article","publication":"IEEE/ACM Transactions on Audio, Speech, and Language Processing","keyword":["computational complexity","reverberation","speech recognition","automatic speech recognition","background noise","clean speech","computational complexity","energy compensation","logarithmic mel power spectral domain","mel frequency cepstral coefficients","microphone input signals","model-based feature compensation schemes","noisy reverberant speech automatic recognition","noisy reverberant speech features","reverberation","Atmospheric modeling","Computational modeling","Noise","Noise measurement","Reverberation","Speech","Vectors","Model-based feature compensation","observation model for reverberant and noisy speech","recursive observation model","robust automatic speech recognition"],"language":[{"iso":"eng"}],"_id":"11861","user_id":"44006","department":[{"_id":"54"}],"year":"2014","citation":{"apa":"Leutnant, V., Krueger, A., &#38; Haeb-Umbach, R. (2014). A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech. <i>IEEE/ACM Transactions on Audio, Speech, and Language Processing</i>, <i>22</i>(1), 95–109. <a href=\"https://doi.org/10.1109/TASLP.2013.2285480\">https://doi.org/10.1109/TASLP.2013.2285480</a>","bibtex":"@article{Leutnant_Krueger_Haeb-Umbach_2014, title={A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech}, volume={22}, DOI={<a href=\"https://doi.org/10.1109/TASLP.2013.2285480\">10.1109/TASLP.2013.2285480</a>}, number={1}, journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing}, author={Leutnant, Volker and Krueger, Alexander and Haeb-Umbach, Reinhold}, year={2014}, pages={95–109} }","mla":"Leutnant, Volker, et al. “A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.” <i>IEEE/ACM Transactions on Audio, Speech, and Language Processing</i>, vol. 22, no. 1, 2014, pp. 95–109, doi:<a href=\"https://doi.org/10.1109/TASLP.2013.2285480\">10.1109/TASLP.2013.2285480</a>.","short":"V. Leutnant, A. Krueger, R. Haeb-Umbach, IEEE/ACM Transactions on Audio, Speech, and Language Processing 22 (2014) 95–109.","ama":"Leutnant V, Krueger A, Haeb-Umbach R. A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech. <i>IEEE/ACM Transactions on Audio, Speech, and Language Processing</i>. 2014;22(1):95-109. doi:<a href=\"https://doi.org/10.1109/TASLP.2013.2285480\">10.1109/TASLP.2013.2285480</a>","ieee":"V. Leutnant, A. Krueger, and R. Haeb-Umbach, “A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech,” <i>IEEE/ACM Transactions on Audio, Speech, and Language Processing</i>, vol. 22, no. 1, pp. 95–109, 2014.","chicago":"Leutnant, Volker, Alexander Krueger, and Reinhold Haeb-Umbach. “A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.” <i>IEEE/ACM Transactions on Audio, Speech, and Language Processing</i> 22, no. 1 (2014): 95–109. <a href=\"https://doi.org/10.1109/TASLP.2013.2285480\">https://doi.org/10.1109/TASLP.2013.2285480</a>."},"intvolume":"        22","page":"95-109","publication_identifier":{"issn":["2329-9290"]},"issue":"1","title":"A New Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech","doi":"10.1109/TASLP.2013.2285480","date_updated":"2022-01-06T06:51:11Z","author":[{"full_name":"Leutnant, Volker","last_name":"Leutnant","first_name":"Volker"},{"full_name":"Krueger, Alexander","last_name":"Krueger","first_name":"Alexander"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"date_created":"2019-07-12T05:29:41Z","volume":22},{"language":[{"iso":"eng"}],"keyword":["Speech recognition","compensation","distortion modeling","joint model training","noise","robustness","uncertainty processing"],"user_id":"44006","department":[{"_id":"54"}],"_id":"11867","status":"public","abstract":[{"lang":"eng","text":"New waves of consumer-centric applications, such as voice search and voice interaction with mobile devices and home entertainment systems, increasingly require automatic speech recognition (ASR) to be robust to the full range of real-world noise and other acoustic distorting conditions. Despite its practical importance, however, the inherent links between and distinctions among the myriad of methods for noise-robust ASR have yet to be carefully studied in order to advance the field further. To this end, it is critical to establish a solid, consistent, and common mathematical foundation for noise-robust ASR, which is lacking at present. This article is intended to fill this gap and to provide a thorough overview of modern noise-robust techniques for ASR developed over the past 30 years. We emphasize methods that are proven to be successful and that are likely to sustain or expand their future applicability. We distill key insights from our comprehensive overview in this field and take a fresh look at a few old problems, which nevertheless are still highly relevant today. Specifically, we have analyzed and categorized a wide range of noise-robust techniques using five different criteria: 1) feature-domain vs. model-domain processing, 2) the use of prior knowledge about the acoustic environment distortion, 3) the use of explicit environment-distortion models, 4) deterministic vs. uncertainty processing, and 5) the use of acoustic models trained jointly with the same feature enhancement or model adaptation process used in the testing stage. With this taxonomy-oriented review, we equip the reader with the insight to choose among techniques and with the awareness of the performance-complexity tradeoffs. The pros and cons of using different noise-robust ASR techniques in practical application scenarios are provided as a guide to interested practitioners. The current challenges and future research directions in this field is also carefully analyzed."}],"type":"journal_article","publication":"IEEE Transactions on Audio, Speech and Language Processing","main_file_link":[{"open_access":"1","url":"http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6732927"}],"doi":"10.1109/TASLP.2014.2304637","title":"An Overview of Noise-Robust Automatic Speech Recognition","date_created":"2019-07-12T05:29:47Z","author":[{"first_name":"Jinyu","full_name":"Li, Jinyu","last_name":"Li"},{"last_name":"Deng","full_name":"Deng, Li","first_name":"Li"},{"first_name":"Yifan","last_name":"Gong","full_name":"Gong, Yifan"},{"last_name":"Haeb-Umbach","id":"242","full_name":"Haeb-Umbach, Reinhold","first_name":"Reinhold"}],"volume":22,"date_updated":"2022-01-06T06:51:11Z","oa":"1","citation":{"chicago":"Li, Jinyu, Li Deng, Yifan Gong, and Reinhold Haeb-Umbach. “An Overview of Noise-Robust Automatic Speech Recognition.” <i>IEEE Transactions on Audio, Speech and Language Processing</i> 22, no. 4 (2014): 745–77. <a href=\"https://doi.org/10.1109/TASLP.2014.2304637\">https://doi.org/10.1109/TASLP.2014.2304637</a>.","ieee":"J. Li, L. Deng, Y. Gong, and R. Haeb-Umbach, “An Overview of Noise-Robust Automatic Speech Recognition,” <i>IEEE Transactions on Audio, Speech and Language Processing</i>, vol. 22, no. 4, pp. 745–777, 2014.","ama":"Li J, Deng L, Gong Y, Haeb-Umbach R. An Overview of Noise-Robust Automatic Speech Recognition. <i>IEEE Transactions on Audio, Speech and Language Processing</i>. 2014;22(4):745-777. doi:<a href=\"https://doi.org/10.1109/TASLP.2014.2304637\">10.1109/TASLP.2014.2304637</a>","bibtex":"@article{Li_Deng_Gong_Haeb-Umbach_2014, title={An Overview of Noise-Robust Automatic Speech Recognition}, volume={22}, DOI={<a href=\"https://doi.org/10.1109/TASLP.2014.2304637\">10.1109/TASLP.2014.2304637</a>}, number={4}, journal={IEEE Transactions on Audio, Speech and Language Processing}, author={Li, Jinyu and Deng, Li and Gong, Yifan and Haeb-Umbach, Reinhold}, year={2014}, pages={745–777} }","mla":"Li, Jinyu, et al. “An Overview of Noise-Robust Automatic Speech Recognition.” <i>IEEE Transactions on Audio, Speech and Language Processing</i>, vol. 22, no. 4, 2014, pp. 745–77, doi:<a href=\"https://doi.org/10.1109/TASLP.2014.2304637\">10.1109/TASLP.2014.2304637</a>.","short":"J. Li, L. Deng, Y. Gong, R. Haeb-Umbach, IEEE Transactions on Audio, Speech and Language Processing 22 (2014) 745–777.","apa":"Li, J., Deng, L., Gong, Y., &#38; Haeb-Umbach, R. (2014). An Overview of Noise-Robust Automatic Speech Recognition. <i>IEEE Transactions on Audio, Speech and Language Processing</i>, <i>22</i>(4), 745–777. <a href=\"https://doi.org/10.1109/TASLP.2014.2304637\">https://doi.org/10.1109/TASLP.2014.2304637</a>"},"intvolume":"        22","page":"745-777","year":"2014","issue":"4"},{"department":[{"_id":"54"}],"user_id":"44006","_id":"11740","language":[{"iso":"eng"}],"keyword":["Gaussian noise","maximum likelihood estimation","parameter estimation","GMM parameter","Gaussian mixture model","MAP estimation","Map-based estimation","maximum a-posteriori estimation","maximum likelihood technique","noisy observation","sequential estimation framework","white Gaussian noise","Additive noise","Gaussian mixture model","Maximum likelihood estimation","Noise measurement","Gaussian mixture model","Maximum a posteriori estimation","Maximum likelihood estimation"],"publication":"38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)","type":"conference","status":"public","abstract":[{"lang":"eng","text":"In this contribution we derive the Maximum A-Posteriori (MAP) estimates of the parameters of a Gaussian Mixture Model (GMM) in the presence of noisy observations. We assume the distortion to be white Gaussian noise of known mean and variance. An approximate conjugate prior of the GMM parameters is derived allowing for a computationally efficient implementation in a sequential estimation framework. Simulations on artificially generated data demonstrate the superiority of the proposed method compared to the Maximum Likelihood technique and to the ordinary MAP approach, whose estimates are corrected by the known statistics of the distortion in a straightforward manner."}],"author":[{"first_name":"Aleksej","last_name":"Chinaev","full_name":"Chinaev, Aleksej"},{"first_name":"Reinhold","full_name":"Haeb-Umbach, Reinhold","id":"242","last_name":"Haeb-Umbach"}],"date_created":"2019-07-12T05:27:20Z","oa":"1","date_updated":"2022-01-06T06:51:08Z","doi":"10.1109/ICASSP.2013.6638279","main_file_link":[{"open_access":"1","url":"https://groups.uni-paderborn.de/nt/pubs/2013/ChHa13.pdf"}],"title":"MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations","related_material":{"link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2013/ChHa13_Poster.pdf","relation":"supplementary_material","description":"Poster"}]},"publication_identifier":{"issn":["1520-6149"]},"page":"3352-3356","citation":{"ama":"Chinaev A, Haeb-Umbach R. MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations. In: <i>38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)</i>. ; 2013:3352-3356. doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6638279\">10.1109/ICASSP.2013.6638279</a>","ieee":"A. Chinaev and R. Haeb-Umbach, “MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations,” in <i>38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)</i>, 2013, pp. 3352–3356.","chicago":"Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations.” In <i>38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)</i>, 3352–56, 2013. <a href=\"https://doi.org/10.1109/ICASSP.2013.6638279\">https://doi.org/10.1109/ICASSP.2013.6638279</a>.","apa":"Chinaev, A., &#38; Haeb-Umbach, R. (2013). MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations. In <i>38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)</i> (pp. 3352–3356). <a href=\"https://doi.org/10.1109/ICASSP.2013.6638279\">https://doi.org/10.1109/ICASSP.2013.6638279</a>","mla":"Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations.” <i>38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)</i>, 2013, pp. 3352–56, doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6638279\">10.1109/ICASSP.2013.6638279</a>.","bibtex":"@inproceedings{Chinaev_Haeb-Umbach_2013, title={MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations}, DOI={<a href=\"https://doi.org/10.1109/ICASSP.2013.6638279\">10.1109/ICASSP.2013.6638279</a>}, booktitle={38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)}, author={Chinaev, Aleksej and Haeb-Umbach, Reinhold}, year={2013}, pages={3352–3356} }","short":"A. Chinaev, R. Haeb-Umbach, in: 38th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013), 2013, pp. 3352–3356."},"year":"2013"}]