TY - GEN AU - Weis, Eduard ID - 62 TI - Searchable Encryption ER - TY - CHAP AU - Kremer, H.-Hugo AU - Beutner, Marc ED - Schweder, M. ID - 6240 SN - 9783779934523 T2 - Jugendstrafvollzug - (k)ein Ort der Bildung!? TI - "Der Unterschied ist, die hat man erwischt" - Berufliche Bildung im Jugendstrafvollzug ER - TY - CHAP AU - Fischer, Holger Gerhard AU - Engler, Michael AU - Sauer, Stefan ID - 6255 SN - 0302-9743 T2 - Design, User Experience, and Usability: Theory, Methodology, and Management TI - A Human-Centered Perspective on Software Quality: Acceptance Criteria for Work 4.0 VL - 10288 ER - TY - CONF AU - Fischer, Holger Gerhard AU - Senft, Björn AU - Stahl, Katharina ED - Bodden, Eric ED - Dressler, Falko ED - Dumitrescu, Roman ED - Gausemeier, Jürgen ED - Meyer auf der Heide, Friedhelm ED - Scheytt, Christoph ED - Trächtler, Ansgar ID - 6256 SN - 978-3-942647-88-5 T2 - Wissenschafts- und Industrieforum 2017 - Intelligente Technische Systeme TI - Akzeptierte Assistenzsysteme in der Arbeitswelt 4.0 durch systematisches Human-Centered Software Engineering VL - 369 ER - TY - GEN ED - Hess, Steffen ED - Fischer, Holger Gerhard ID - 6305 TI - Mensch und Computer 2017 - Usability Professionals. Tagungsband ER - TY - JOUR AB - A current trend in networking and cloud computing is to provide compute resources at widely distributed sites; this is exemplified by developments such as Network Function Virtualisation. This paves the way for wide-area service deployments with improved service quality: e.g. user-perceived response times can be reduced by offering services at nearby sites. But always assigning users to the nearest site can be a bad decision if this site is already highly utilised. This paper formalises two related decisions of allocating compute resources at different sites and assigning users to them with the goal of minimising the response times while the total number of resources to be allocated is limited – a non-linear capacitated Facility Location Problem with integrated queuing systems. To efficiently handle its non-linearity, we introduce five linear problem linearisations and adapt the currently best heuristic for a similar scenario to our scenario. All six approaches are compared in experiments for solution quality and solving time. Surprisingly, our best optimisation formulation outperforms the heuristic in both time and quality. Additionally, we evaluate the influence of distributions of available compute resources in the network on the response time: The time was halved for some configurations. The presented formulation techniques for our problem linearisations are applicable to a broader optimisation domain. AU - Keller, Matthias AU - Karl, Holger ID - 64 IS - 1 JF - IEEE Transactions on Network and Service Management TI - Response-Time-Optimised Service Deployment: MILP Formulations of Piece-wise Linear Functions Approximating Non-linear Bivariate Mixed-integer Functions ER - TY - JOUR AB - Students' experiences of their first year of studying are of prime importance for their further development in Higher Education (HE). Consequently, the first year and the related phenomena of student performance, retention, and dropout have been extensively studied. Research shows that during the first year, the individual student's ability or failure to adapt to the new socio-cultural environment influences his/her academic success. Yet, surprisingly little is known about the actual processes through which students integrate into the socio-cultural context of HE. Applying a socio-cultural approach, our qualitative interview study followed 14 university students through their first year, investigating why some students experience an easier transition into HE compared to others. Our research results in a typology of four transition types characterized by their orientation towards the socio-cultural context of studying. AU - Jenert, Tobias AU - Brahm, Taiga AU - Gommers, Luci AU - Kühner , Patrizia ID - 4420 IS - 87-99 JF - Learning, Culture and Social Interaction KW - Student transition KW - Enculturation KW - Dropout KW - Retention TI - How do they find their place? A typology of students' enculturation during the first year at a business school VL - 12 ER - TY - CONF AB - Educational research is often conducted in practical contexts such as schools or higher education institutions and aims to contribute to the development of instructional designs or programs. Consequently, there have been repeated attempts to methodologically integrate the design aspect into educational research leading to concepts such as design-based research. Ideally, design decisions are based on clear evidence, obtained through an analysis of data gathered from the intervention. In actual projects, however, design decisions often have to be taken based on data that is incomplete, ambiguous or not meeting established scientific quality standards. We illustrate and discuss examples of an actual design research project where design decisions had to be taken in such ‘bad data’ contexts. Examples include different mixed methods configurations that helped to increase the interpretability and practical significance of the data. We will discuss methodological variants of ‘mixing’ and triangulation such as combining quantitative and qualitative data or applying different analyses on a dataset. In addition, we discuss limitations regarding the consistency between data, design decisions, and resulting effects AU - Jenert, Tobias ID - 4454 TI - Using mixed methods to support educational design decisions in ‘bad data’contexts ER - TY - CONF AB - Higher education institutions (HEIs) have been described as “loosely coupled systems” (Weick, 1976) where academic disciplines have stronger cohesive forces than formal structures (Becher & Trowler, 2001). Disciplinary ties are also extremely important for the development of teaching practices in HEIs. Roxa & Martensson (2011) have shown that higher education faculty form local networks in which they share and develop teaching-related experiences. These networks are influenced by disciplinary affiliation and mediated by senior faculty (Roxa & Martensson, 2015). Considering these findings, its is not self-evident for the actors on different vertical (e.g. management, faculty and education developers) and horizontal levels (e.g. disciplines) of HEIs to work collaboratively. Therefore, the bounded nature of disciplinary networks can actually inhibit the development of educational innovations that require collaboration beyond such “disciplinary microcultures” (Kries & Nierobisch, 2016). Effective educational practices such as problem-based curricula or cross-disciplinary co-teaching require interactions that reach beyond disciplinary and hierarchical boundaries. In this study we investigate a network – “Lehren” – that was initiated in Germany to stimulate educational innovations in HEIs by overcoming the abovementioned boundaries. A series of five workshops brought together 32 potential innovators representing different disciplines, functions (management, teaching faculty, educational developers), and status groups (full professors, post-docs, others). Three of these workshop series provide a total 96 individuals who are intended to form a professional network promoting educational innovation in their respective HEIs. Providing intense support and incentives to collaborate among each other (network meetings, travel funds, online communities), the aim is to develop a heterogeneous network connecting people with, among others, different functions and from different disciplines. AU - Jenert, Tobias AU - Gommers , Luci ID - 4455 TI - Investigating Networks within the field of Higher Organisation Institutions ER - TY - CONF AB - Student reflection is considered both a crucial feature of high-quality learning as well as an important objective in Higher Education. Despite its apparent relevance for educational practice, most of the research on reflection remains at a conceptual level (Boud & Walker, 1998; Mann, Gordon & MacLeod, 2007), whilst empirical research mainly focuses on measuring students’ reflection levels. Regarding the effectiveness of specific interventions (e.g. portfolios) to develop reflective skills, there is little empirical evidence going beyond case studies and qualitative accounts. Thus, the purpose of this research was to develop and validate an instrument for measuring student reflection in Higher Education in general and business schools in particular. The questionnaire is designed to measure students’ reflection in three dimensions: students’ reflection levels, their attitudes towards reflection, and supporting and hindering factors influencing students’ reflection processes. A pre-test was conducted at two different universities in Switzerland and Germany to validate the Reflection in Business Education Questionnaire (RIBEQ). In total, 64 students filled in the survey. Exploratory factor analyses and reliability tests showed satisfactory psychometric qualities of the RIBEQ. This study can support further research on student reflection and its development. Also, the questionnaire can be used as a diagnostic instrument for business schools to trace students’ development over time. From a practical point of view, it can also be applied to identify supporting and hindering factors at a particular higher education institution in order to develop practical interventions targeting these factors. AU - Jenert, Tobias AU - Gommers, Luci AU - Brahm, Taiga AU - Wagner , Dietrich ID - 4456 TI - Development and validation of the Reflection in Business Education Questionnaire ER - TY - CONF AU - Wagner, Dietrich AU - Jenert, Tobias AU - Brahm, Taiga AU - Gommers, Luci ID - 4457 TI - Educating reflective managers: Why everybody wants and nobody likes it ER - TY - CONF AU - Jenert, Tobias AU - Brahm, Taiga AU - Gommers , Luci ID - 4458 TI - Die Enkulturation von Studierenden an der Hochschule – Ergebnisse einer längsschnittlichen qualitativen Untersuchung ER - TY - CONF AU - Jenert, Tobias AU - Brahm, Taiga AU - Wagner, Dietrich ID - 4459 TI - Warum Wirtschaftsstudierende (nicht) reflektieren. Eine empirische Untersuchung. ER - TY - CONF AB - The importance of online ratings on sales is widely acknowledged. Firms need to find ways of increasing the number of ratings and rating scores, but how they can achieve this effectively is less well established. In this paper we analyze the impact of an unconditional gift on customers’ rating behavior in an online field experiment. Contrary to prevalent advice, our results suggest that providing a gift is not necessarily beneficial. Younger customers are significantly less likely to rate when exposed to an unconditional gift. Regression analysis reveals that age serves as a moderator and older customers even respond slightly positive to a gift. Having detected a negative effect of gifts on rating behavior provides first indicative evidence of a possible crowding out of intrinsic motivation in the context of online ratings. This has direct implications for practitioners considering the usage of gifts to elicit online ratings. AU - Gutt, Dominik AU - Schlangenotto, Darius AU - Kundisch, Dennis ID - 45 T2 - Wirtschaftsinformatik Proceedings, St. Gallen, Switzerland TI - You can’t buy my rating! On the pivotal effect of an unconditional gift on rating behavior ER - TY - CONF AU - Jenert, Tobias AU - Barnat, M. AU - Salden, P. AU - Dilger, B. ID - 4503 T2 - Tagungsband DGHD Tagung 2017 TI - Struktur, Prozess oder Didaktik als Ausgangspunkt? Ein integratives Modell der Curriculumentwicklung an Hochschulen ER - TY - GEN AU - Grobbel, Florian ID - 46 TI - Was kommt zuerst? Erkennung von zeitlichen Abläufen infunktionalen Softwareanforderungsbeschreibungen ER - TY - GEN AU - Zhang, Xuehai AU - Feng, Yuanhua AU - Peitz, Christian ID - 4633 TI - A general class of SemiGARCH models based on the Box-Cox transformation ER - TY - GEN AU - Feng, Yuanhua AU - Gries, Thomas ID - 4671 TI - Data-driven local polynomial for the trend and its derivatives in economic time series ER - TY - THES AU - Rose, Anica ID - 4674 TI - The Performance of Individuals, Teams, and Organizations: Empirical Evidence from the Field ER - TY - CONF AU - Jaakonmäki, Roope AU - Müller, Oliver AU - vom Brocke, Jan ID - 4683 SN - 978-0-9981331-0-2 T2 - Hawaii International Conference on System Sciences TI - The Impact of Content, Context, and Creator on User Engagement in Social Media Marketing ER -