TY - CHAP AU - Biehler, Rolf AU - Guntermann, Dominik AU - Liebendörfer, Michael AU - Krämer, Sandra AU - Schlüter, Sarah ED - Goethe-Universität Frankfur, IDMI-Primar ID - 52811 SN - 978-3-95987-208-9 T2 - Beiträge zum Mathematikunterricht 2022. 56. Jahrestagung der Gesellschaft für Didaktik der Mathematik TI - Fachdidaktisches Design von Begründungsvideos im Projekt studiVEMINTvideos VL - 1 ER - TY - CHAP AU - Göller, Robin AU - Gildehaus, Lara AU - Liebendörfer, Michael AU - Besser, Michael ED - Härterich, Jörg ED - Kallweit, Michael ED - Rolka, Katrin ED - Skill, Thomas ID - 52810 SN - 978-3-95987-264-5 T2 - Hanse-Kolloquium zur Hochschuldidaktik der Mathematik 2021. Beiträge zum gleichnamigen Online-Symposium am 12 November 2021 aus Bochum TI - Erfassung und Vergleich (mathematischer) Eingangsvoraussetzungen angehender Studierender verschiedener mathematikhaltiger Studiengänge ER - TY - CHAP AU - Kempen, Leander AU - Liebendörfer, Michael ED - Härterich, Jörg ED - Kallweit, Michael ED - Rolka, Katrin ED - Skill, Thomas ID - 52809 SN - 978-3-95987-264-5 T2 - Hanse-Kolloquium zur Hochschuldidaktik der Mathematik 2021. Beiträge zum gleichnamigen Online-Symposium am 12 November 2021 aus Bochum TI - Zu digital - zu viel - zu schwer? Qualitative Einsichten in das Erleben und Handeln von Erstsemester-Studierenden der Mathematik während der Corona-Pandemie ER - TY - CHAP AU - Schlüter, Sarah AU - Liebendörfer, Michael ED - Goethe-Universität Frankfur, IDMI-Primar ID - 52813 SN - 978-3-95987-208-9 T2 - Beiträge zum Mathematikunterricht 2022. 56. Jahrestagung der Gesellschaft für Didaktik der Mathematik TI - Bearbeitungsmuster von Studierenden im Umgang mit formalen Definitionen im Kontext konstanter Folgen VL - 2 ER - TY - CHAP AU - Krämer, Sandra AU - Liebendörfer, Michael ED - Goethe-Universität Frankfur, IDMI-Primar ID - 52812 SN - 978-3-95987-208-9 T2 - Beiträge zum Mathematikunterricht 2022. 56. Jahrestagung der Gesellschaft für Didaktik der Mathematik TI - Förderung prozeduraler Flexibilität durch Lernvideos mit interaktiven Aufgaben VL - 2 ER - TY - JOUR AB - Many preservice mathematics teachers lose their motivation during their first year at university. This phenomenon has been repeatedly described in recent years but is not yet fully under­stood. Since motivation may relate to different objects such as mathematics or teaching, we aim to qualitatively reconstruct different facets of the central motivational constructs of Situated-Expectancy-Value theory (intrinsic value, attainment value, utility value, cost, and expectancy of success) for preservice mathematics teachers. The analysis of longitudinal group interviews of 14 pre­service higher-secondary mathematic teachers from a German university revealed different objects of motivation (e.g., teaching mathematics, scientific mathematics, procedural mathematics, or proof-based mathematics) in preservice teachers' values and expectancy of success. Furthermore, relations between those values and expectancy of success were identified that played a significant role in preservice teachers’ motivational development over their first semester (e.g., relations of attain­ment value for scientific mathematics and psychological cost). Theoretical and practical implications towards a teaching-specific conceptualization of expectancy of success and values and value interventions are being discussed. ID - 52807 TI - Preservice teachers’ mathematics-related values and expectancy in the transition from school to university ER - TY - CHAP AU - de Camargo e Souza Câmara, Igor AU - Turhan, Anni-Yasmin ID - 52859 SN - 0302-9743 T2 - Logics in Artificial Intelligence TI - Deciding Subsumption in Defeasible $$\mathcal {ELI}_\bot $$ with Typicality Models ER - TY - JOUR AU - Gil, Oliver Fernández AU - Patrizi, Fabio AU - Perelli, Giuseppe AU - Turhan, Anni-Yasmin ID - 52861 JF - CoRR TI - Optimal Alignment of Temporal Knowledge Bases VL - abs/2307.15439 ER - TY - CONF AU - Ŝkvorc, Urban AU - Eftimov, Tome AU - Koro]ec, Peter ID - 52863 T2 - 2023 IEEE Symposium Series on Computational Intelligence (SSCI) TI - Analyzing the Generalizability of Automated Algorithm Selection: A Case Study for Numerical Optimization ER - TY - CONF AU - Turhan, Anni-Yasmin ED - Kutz, Oliver ED - Lutz, Carsten ED - Ozaki, Ana ID - 52913 T2 - Proceedings of the 36th International Workshop on Description Logics {(DL} 2023) co-located with the 20th International Conference on Principles of Knowledge Representation and Reasoning and the 21st International Workshop on Non-Monotonic Reasoning {(KR} 2023 and NMR 2023)., Rhodes, Greece, September 2-4, 2023 TI - Brushing-up DLs to Cope with Imperfect Data (Abstract of Joint DL+NMR Invited Talk) VL - 3515 ER - TY - CHAP AU - Kehrbusch, Burkhard AU - Engels, Gregor ED - Vogel-Heuser, Birgit ED - Wimmer, Manuel ID - 28338 T2 - Digital Transformation: Core Technologies and Emerging Topics from a Computer Science Perspective TI - Digital Transformation - Towards flexible human-centric enterprises ER - TY - JOUR AB - Optical traveling wave antennas offer unique opportunities to control and selectively guide light into a specific direction, which renders them excellent candidates for optical communication and sensing. These applications require state-of-the-art engineering to reach optimized functionalities such as high directivity and radiation efficiency, low sidelobe levels, broadband and tunable capabilities, and compact design. In this work, we report on the numerical optimization of the directivity of optical traveling wave antennas made from low-loss dielectric materials using full-wave numerical simulations in conjunction with the particle swarm optimization algorithm. The antennas are composed of a reflector and a director deposited on a glass substrate, and an emitter placed in the feed gap between them serves as an internal source of excitation. In particular, we analyze antennas with rectangular- and horn-shaped directors made of either hafnium dioxide or silicon. The optimized antennas produce highly directional emissions due to the presence of two dominant guided TE modes in the director in addition to leaky modes. These guided modes dominate the far-field emission pattern and govern the direction of the main lobe emission, which predominately originates from the end facet of the director. Our work also provides a comprehensive analysis of the modes, radiation patterns, parametric influences, and bandwidths of the antennas, which highlights their robust nature. AU - Farheen, Henna AU - Leuteritz, Till AU - Linden, Stefan AU - Myroshnychenko, Viktor AU - Förstner, Jens ID - 28413 IS - 1 JF - Journal of the Optical Society of America B KW - tet_topic_opticalantenna SN - 0740-3224 TI - Optimization of optical waveguide antennas for directive emission of light VL - 39 ER - TY - JOUR AB - We study a double-scattering coherent mechanism of negative polarization (NP) near opposition that is observed for powder-like surfaces. The problem is solved numerically for absorbing structures with irregular constituents, cubes, spheres, and ellipsoids larger than the wavelength of incident light. Our simulations show that double scattering between two random irregular particles shows weak NP. Adding one more particle significantly increases the relative contribution of double scattering which enhances NP. Simulations with regular shapes and controlled geometric parameters show that the interference mechanism is sensitive to the geometry of the scattering system and can also result in no polarization or even strong enhancement of positive polarization at backscattering. AU - Alhaddad, Samer AU - Grynko, Yevgen AU - Farheen, Henna AU - Förstner, Jens ID - 29075 IS - 1 JF - Optics Letters KW - tet_topic_scattering SN - 0146-9592 TI - Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles VL - 47 ER - TY - GEN AU - Koldewey, Christian AU - Dumitrescu, Roman AU - Rabe, Martin ID - 29149 T2 - Proceedings of the 55th Hawaii International Conference on System Sciences TI - Introduction to the Data-driven Services in Manufacturing Minitrack - Exploring Management, Engineering, and Organizational Transformation ER - TY - CONF AU - Abughannam, Saed AU - Scheytt, J. Christoph ID - 29767 T2 - International Symposium on Circuits and Systems (ISCAS 2022) TI - Low-Power Low-Data-Rate Wireless PPM Receiver Based on 13-Bits Barker Coded SAW Correlator with Scalable Data-Rate and Sensitivity ER - TY - CONF AU - Abughannam, Saed AU - Kruse, Stephan AU - Iftekhar, Mohammed AU - Scheytt, J. Christoph ID - 29770 T2 - German Microwave Conference 2022 (GeMiC 2022) TI - Design and Measurements of a Low-power Low-Date-rate Direct-detection Wireless Receiver with Improved Co-channel Interference Robustness ER - TY - CONF AB - The development of business models is a challenging task that can be supported with software tools. Here, existing approaches and tools do not focus on the company’s situation in which the development takes place (e.g., financial resources, product type). To tackle this challenge, we used design science research to develop a situation-specific business model development approach that contains three stages: First, existing knowledge in terms of tasks to do (e.g., analyze competitive advantage), and decisions to be made (e.g., social media marketing) are stored in repositories. Second, the knowledge is used to compose a development method based on the company’s situation. Third, the development method is enacted to develop a business model. This demonstration paper presents a tool-support called Situational Business Model Developer that supports all stages of our approach. We release the tool under open-source and evaluate it with a case study on developing business models for mobile apps. AU - Gottschalk, Sebastian AU - Yigitbas, Enes AU - Nowosad, Alexander AU - Engels, Gregor ID - 29839 KW - Business Model Development KW - Situational Method Engineering KW - Tool Support T2 - Proceedings of the 17th International Conference on Wirtschaftsinformatik TI - Situational Business Model Developer: A Tool-support for Situation-specific Business Model Development ER - TY - CONF AB - Due to the proliferation of Virtual Reality (VR) technology, VR is finding new applications in various domains, such as stock trading. Here, traders invest in stocks intending to increase their profit. For this purpose, in conventional stock trading, traders usually make use of 2D applications on desktop or laptop devices. This leads to many drawbacks such as poor visibility due to limited 2D representation, complex interaction due to indirect interaction via mouse and keyboard, or restricted support for collaboration between traders. To overcome these issues, we have developed a novel collaborative, virtual environment for stock trading, which enables stock traders to view financial information and trade stocks with other collaborators. The main results of a usability study indicate that the VR environment, compared to conventional stock trading, shows no significant advantages concerning efficiency and effectiveness, however, we could observe an increased user satisfaction and better collaboration. AU - Yigitbas, Enes AU - Gottschalk, Sebastian AU - Nowosad, Alexander AU - Engels, Gregor ID - 29840 KW - virtual reality KW - stock trading KW - collaboration KW - usability T2 - Proceedings of the 17th International Conference on Wirtschaftsinformatik TI - Development and Evaluation of a Collaborative Stock Trading Environment in Virtual Reality ER - TY - JOUR AU - Castenow, Jannik AU - Kling, Peter AU - Knollmann, Till AU - Meyer auf der Heide, Friedhelm ID - 29843 JF - Information and Computation KW - Computational Theory and Mathematics KW - Computer Science Applications KW - Information Systems KW - Theoretical Computer Science SN - 0890-5401 TI - A Discrete and Continuous Study of the Max-Chain-Formation Problem ER - TY - THES AU - Schneider, Stefan Balthasar ID - 29672 TI - Network and Service Coordination: Conventional and Machine Learning Approaches" ER -