TY - GEN AU - Hüster, Jonas Maximilian ID - 49115 TI - Zum Potential von Lernmaterial für den Einsatz im konfessionell-kooperativen Religionsunterricht: eine qualitative Inhaltsanalyse von Unterrichtsentwürfen zum Thema Märtyrerinnen und Märtyrer ER - TY - JOUR AB - Die Kooperation zwischen Elternhaus und Schule kann Eltern in ihren Fähigkeiten zur Internetnutzung und -gestaltung sowie in der Wahl passender Medienerziehungsstrategien ihrer Kinder unterstützen. Voraussetzung dafür ist Wissen darüber, welche Kooperationsangebote Eltern von Schulen zum Thema digitale Medien erhalten. Die vorliegende Studie untersuchte anhand einer Befragung von N = 736 Schülerinnen und Schülern der fünften Klassenstufe und N = 426 ihrer Eltern, welche Informations- und Teilhabeangebote letztere erhielten und wie diese Angebote mit elterlichen Fähigkeiten zur Nutzung und Gestaltung des Internets sowie Medienerziehung zusammenhängen. Eltern erhielten nur zum Teil Informations- und Teilhabeangebote zum Thema ‹digitale Medien›. Eltern mit Migrationshintergrund und Eltern mit niedrigeren bis mittleren Bildungsabschlüssen berichteten aber, häufiger Angebote zu erhalten. Je häufiger Eltern Angebote erhielten, bei denen sie digitale Medien mit ihren Kindern zusammen ausprobieren und erproben konnten, umso geringer waren Fähigkeiten zur Internetnutzung. Dies kann mit der Passung der Angebote von Schulen zu den Bedürfnissen von Eltern zusammenhängen, aber auch ein Anzeichen dafür sein, dass gerade Eltern mit geringeren Fähigkeiten auf Kooperationsangebote von Schulen eingehen. Es wurden keine signifikanten Zusammenhänge zwischen Kooperationsangeboten und Medienerziehung gefunden. Ergebnisse können helfen, vermehrte Angebote für Eltern zu schaffen sowie adressatengerecht zu gestalten. AU - Bonanati, Sabrina AU - Kurock, Ricarda AU - Gruchel, Nicole AU - Buhl, Heike M. ID - 32563 JF - MedienPädagogik SN - 1424-3636 TI - Kooperation von Elternhaus und Schule zum Thema "digitale Medien". Unterschiede zwischen Elternhäusern und Zusammenhänge mit elterlichen Fähigkeiten zur Nutzung und Gestaltung des Internets sowie Medienerziehung VL - 46 ER - TY - JOUR AB - The family plays an important role in adolescents’ social development. Yet there is little information about the impact of family climate on adolescents’ social adaptation, and the term “family climate” is seldom clearly defined and is usually related to other concepts, such as family systems or family environments. To understand the core of family climate, this study conducted a systematic review to analyze research about family climate associated with adolescents’ social adaptation in community samples. A search of empirical research published over the last 20 years identified 12 relevant studies. The studies revealed that family climate can mainly be described in terms of cohesion, conflict, organization, adaptability, and expressiveness. Family climate was shown to be a good predictor of both problem-solving skills and violence in relationships and exhibited further associations with other aspects of social adaptation. This review revealed a need for more systematic and longitudinal research on family climate in community samples. AU - Kurock, Ricarda AU - Gruchel, Nicole AU - Bonanati, Sabrina AU - Buhl, Heike M. ID - 32565 JF - Adolescent Research Review KW - Family environment KW - Family system KW - Adolescents KW - Social adaptation KW - Systematic review SN - 2363-8346 TI - Family Climate and Social Adaptation of Adolescents in Community Samples: A Systematic Review ER - TY - CHAP AU - Haacke-Werron, Stefanie AU - Karsten, Andrea AU - Scharlau, Ingrid ED - Haacke-Werron, Stefanie ED - Karsten, Andrea ED - Scharlau, Ingrid ID - 34014 T2 - Reflexive Schreibwissenschaft. Disziplinäre und praktische Perspektiven TI - Einleitung ER - TY - CHAP AU - Karsten, Andrea ED - Haacke-Werron, Stefanie ED - Karsten, Andrea ED - Scharlau, Ingrid ID - 50007 T2 - Reflexive Schreibwissenschaft. Disziplinäre und praktische Perspektiven TI - Sprechen, Schreiben, Denken ER - TY - JOUR AU - Junker, Annika AU - Timmermann, Julia AU - Trächtler, Ansgar ID - 50071 IS - 12 JF - IFAC-PapersOnLine KW - Control and Systems Engineering SN - 2405-8963 TI - Learning Data-Driven PCHD Models for Control Engineering Applications* VL - 55 ER - TY - GEN AU - Hartung, Olaf ID - 48915 KW - Museum Geschichte Exponate T2 - BBBank-Magazin Wertsache TI - Museen sind wie Denkmäler ER - TY - CONF AU - Moritzer, Elmar AU - Hecker, Felix ED - Bourell, David L. ED - Beaman, Joseph J. ED - Crawford, Richard H. ED - Kovar, Desiderio ED - Seepersad, Carolyn C. ED - Tehrani, Mehran ID - 33852 T2 - Proceedings of the 33rd Annual Freeform Fabrication Symposium TI - VALIDATION AND COMPARISON OF FEM-SIMULATION RESULTS OF THE FUSED DEPOSITION MODELING PROCESS UNDER CONSIDERATION OF DIFFERENT MESH RESOLUTIONS ER - TY - JOUR AB - Psychologists claim that being treated kindly puts individuals in a positive emotional state: they then treat an unrelated third party more kindly. Numerous experiments document that subjects indeed ‘pay forward’ specific behavior. For example, they are less generous after having experienced stinginess. This, however, is not necessarily driven by emotions. Subjects may also imitate what they regard as socially adequate behavior. Here, I present an experiment in which imitation is not possible at the next opportunity to act with a stranger: after being given either a fun or an annoying job, subjects have to decide whether to be generous or not. I find that although subjects who are given the annoying job report more negative emotions than those with the fun job, they do not treat an unrelated third person more unkindly in terms of passing on less money. AU - Schnedler, Wendelin ID - 34473 JF - Games and Economic Behavior KW - Economics and Econometrics KW - Finance SN - 0899-8256 TI - The broken chain: Evidence against emotionally driven upstream indirect reciprocity VL - 136 ER - TY - GEN AU - Safaei, Reyhaneh ID - 35801 TI - Transfer Pricing Rules for Intangibles: Implementation and Practical Challenges VL - 79 ER - TY - GEN AU - Shabestari, Mehrzad Azmi AU - Safaei, Reyhaneh ID - 35802 TI - Changes in Transfer Pricing Regulations and Corporate Investment Decisions ER - TY - CONF AB - In this work, the influences of spherical fillers on the processing properties and the resulting mechanical properties of laser sintered components are investigated. For this purpose, micro glass spheres, hollow glass bubbles and mineral spheres are dry blended to the matrix polymers polyamide 613 and polypropylene with a filling ratio of 20 and 40 vol%. First, relevant properties of the blends, such as powder flowability, thermal behavior and melt viscosity, are investigated. Based on the results, processing parameters are then developed for the LS process and the mechanical properties of the components are investigated. The aim is to be able to tailor the mechanical properties of LS components by adding fillers and thus to create new application areas for additively manufactured components. AU - Kletetzka, Ivo AU - Gawlikowicz, Roland AU - Schmid, Hans-Joachim ID - 30220 T2 - Proceedings of the 33th Annual International Solid Freeform Fabrication Symposium TI - Effects of spherical fillers on the processability and mechanical properties of PA613 and PP-based LS dry blends VL - 33 ER - TY - CONF AU - Kletetzka, Ivo AU - Klippstein, Sven Helge AU - Schmid, Hans-Joachim ID - 32874 T2 - Proceedings of the 33th Annual International Solid Freeform Fabrication Symposium TI - Shelf Life of Polyamide 12 (PA2200) Laser Sintering Powder VL - 33 ER - TY - BOOK AU - Hoyer, Isabelle AU - Reis, Oliver ID - 34655 TI - Artefakte als (An-)Zeiger der Zeit. Praxistheoretische Analysen zu religiösen Artefakten an einer Katholischen Schule ER - TY - CONF AB - The manufacturing industry contributes immensely to the global emissions and therefore is a key factor that has to be addressed when a more sustainable production is desired. Laser Powder Bed Fusion (LPBF) is an AM technique that offers the possibility to manufacture metal parts in a more material efficient way due to the layer-by-layer build-up. Nevertheless, the processing chain for parts from LPBF contains additional steps like powder atomization, which also influence the ecological footprint of the production chain. Within this work, a life-cycle model for the production step of parts from AlSi10Mg powder material is developed. The model is supplied with data from the powder atomization up to the production step, either by literature, database or experimental measurements during production. The footprint in terms of CO2 emissions is then analyzed and emission-intense steps are identified. Two manufacturing scenarios are considered to evaluate the sensitivity on the emissions. AU - Bödger, Christian AU - Weiss, Christian AU - Schiefer, Ekkehard AU - Heussen, Daniel AU - Haefner, Constantin ID - 50744 T2 - Proceedings of the 33rd Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference TI - Evaluation of the Ecological Footprint for Parts from AlSi10Mg manufactured by Laser Powder Bed Fusion ER - TY - JOUR AU - Blank, Andreas ID - 50858 IS - 1 JF - Intellectual History Review TI - “Christoph Besold on Confederation Rights and Duties of Esteem in Diplomatic Relations.” VL - 32 ER - TY - JOUR AU - Blank, Andreas ID - 50856 IS - 2 JF - Journal of International Political Theory TI - “Pufendorf and Leibniz on Duties of Esteem in Diplomatic Relations.” VL - 18 ER - TY - JOUR AU - Blank, Andreas ID - 50857 IS - 1 JF - Intellectual History Review TI - “Esteem and Self-Esteem in Early Modern Ethics and Politics. An Overview.” VL - 32 ER - TY - JOUR AU - Blank, Andreas ID - 50861 IS - 1 JF - Hungarian Philosophical Review TI - “On Reconstructing Leibniz’s Metaphysics.” VL - 66 ER - TY - GEN AU - Bayer, Christian AU - Engelmaier, Florian AU - Riphahn, Regina T. AU - Schmidt-Dengler, Philipp AU - Sondergeld, Virgina AU - Sureth-Sloane, Caren AU - von Wangenheim, Jonas AU - Weizsäcker, Georg ID - 35753 TI - Beste Bedingungen für junge Ökonominnen und Ökonomen? Neue Daten und Empfehlungen der AG Nachwuchs im Verein für Socialpolitik ER - TY - CHAP AU - Haker, Christoph AU - Otterspeer, Lukas ED - Matthes, Dominique ED - Pallesen, Hilke ID - 51308 SN - 2512-2037 T2 - Bilder von Lehrer*innenberuf und Schule (Mediale) Entwürfe zwischen Produktion, Rezeption und Aneignung TI - Lehrer*innenbilder in Autosozioanalysen. Die Emergenzfunktion von Lehrer*innen als abwesende Dritte ER - TY - CONF AU - Haker, Christoph AU - Otterspeer, Lukas ED - Frank, Magnus ED - Geier, Thomas ED - Hornberg, Sabine ED - Machold, Claudia ED - Otterspeer, Lukas ED - Singer-Brodowski, Mandy ED - Stošić, Patricia ID - 51307 SN - 9783847417798 T2 - Grenzen auflösen – Grenzen ziehen: Grenzbearbeitungen zwischen Erziehungswissenschaft, Politik und Gesellschaft TI - Grenzbearbeitungen – methodologische Überlegungen zu einer sozialwissenschaftlichen Forschungsperspektive ER - TY - CHAP AU - Haker, Christoph AU - Otterspeer, Lukas AU - Schildknecht, Lukas ID - 51306 T2 - Demokratie unter Druck TI - Antiakademismus heute VL - 12 ER - TY - THES AB - Vorgestellt wird ein Entwicklungsforschungsprojekt zur Konzeption und Durchführung einer Veranstaltung "Geometrie für Lehramtsstudierende". Die Schwerpunkte des Projekts sind zum einen die inhaltliche Gestaltung der Veranstaltung und zum anderen die Umsetzung von Professionsorientierung. Bezogen auf den inhaltlichen Aufbau wird das auf metrischen Räumen aufbauende Axiomensystem der "Saccheri-Ebene" vorgestellt und mit alternativen axiomatischen Zugängen zur ebenen Geometrie verglichen. Die Frage nach der Umsetzung von Professionsorientierung in Fachveranstaltungen ist eng mit der Problematik der zweiten Diskontinuität verbunden. In der Arbeit wird dieses Problem auf Grundlage der Synthese von theoretischen Hintergründen zur Bedeutung von mathematischem Wissen und Können für professionelle Handlungskompetenz von Mathematiklehrkräften diskutiert und darauf aufbauend werden theoriebasierte Entwurfsprinzipien für professionsorientierte Fachveranstaltungen entworfen. Zentrale Elemente der methodischen Gestaltung sind die sogenannten "Schnittstellenwochen" zu den Themen Kongruenz und Symmetrie sowie das begleitende Schnittstellen-ePortfolio. Das zentrale Ergebnis der Arbeit ist ein theoretisch fundiertes und empirisch evaluiertes ganzheitliches Veranstaltungskonzept für eine professionsorientierte Geometrie-Veranstaltung für Lehramtsstudierende, dessen Konzeption auf andere Fachveranstaltungen übertragbar ist. Darüber hinaus ergeben sich im Rahmen der durchgeführten Entwicklungsforschung verschiedene neue Beiträge zur Geometriedidaktik in Schule- und Hochschule. AU - Hoffmann, Max ID - 31363 TI - Von der Axiomatik bis zur Schnittstellenaufgabe: Entwicklung und Erforschung eines ganzheitlichen Lehrkonzepts für eine Veranstaltung Geometrie für Lehramtsstudierende ER - TY - GEN AU - Lammer, Christina ID - 51474 T2 - KinderundJugendmedien.de TI - Alles wird gut, immer (Rezension) ER - TY - JOUR AU - Leineweber, Jonas ID - 33207 JF - Westfalen/Lippe - historisch TI - Schützenfeste@home und "gesicherte Brauchtumszonen". Eine ‚Geschichte in Echtzeit‘ von Ritualen, Bräuchen und Festen in der Coronakrise ER - TY - CONF AU - Moritzer, Elmar AU - Hecker, Felix ED - Bourell, David L. ED - Beaman, Joseph J. ED - Crawford, Richard H. ED - Kovar, Desiderio ED - Seepersad, Carolyn C. ED - Tehrani, Mehran ID - 33853 T2 - Proceedings of the 33rd Annual Freeform Fabrication Symposium TI - INVESTIGATION OF THE PROCESS PARAMETERS AND GEOMETRY DEPENDENT SHRINKAGE BEHAVIOR OF RASTER LINES IN THE FUSED DEPOSITION MODELING PROCESS ER - TY - GEN AU - Schmitt, Martin ID - 51823 IS - 2 T2 - Francia-Recensio TI - Rezension zu: Fickers, Andreas/Griset, Pascal: Communicating Europe. Technologies, Information, Events, Basingstoke, Hampshire 2019 VL - 2022 ER - TY - GEN AU - Albers, Timm AU - Hoeft, Maike AU - Meusel, Sarah AU - Heberle, Kathrin ID - 48018 TI - Ein Blick auf: Gestaltung des Übergangs in die Kindertageseinrichtung im Bundesprogramm „Kita-Einstieg: Brücken bauen in frühe Bildung“ ER - TY - CHAP AU - Abdelrahem, Mohammed ED - Islamic Cooperation „OIC“, Organisation of ID - 52322 KW - Dialog der Religionen KW - interreligiöser Dialog KW - Komparative Theologie KW - Islam und Christentum T2 - At-Taʿāyuš wa-t-taʿāruf fī l-islām – mafāhīm muyassara (Zusammenleben und Kennenlernen im Islam - Einführungsbegriffe) TI - wiḥdat ad-Dīn (Einheit der Religionen) ER - TY - CHAP AU - Karsten, Andrea AU - Schwede, Jana AU - Körber, Miriam AU - Scharlau, Ingrid ED - Schmitt, Rudolf ED - Schröder, Julia ED - Pfaller, Larissa ED - Hoklas, Anne-Kathrin ID - 52351 SN - 9783658361204 T2 - Die Praxis der systematischen Metaphernanalyse: Anwendungen und Anschlüsse TI - Transitivitätscharakteristika als Werkzeug in der systematischen qualitativen Metaphernanalyse ER - TY - GEN AU - Breckner, Anne ID - 52467 TI - Schöpfung, Universität und Schule ER - TY - BOOK AB - Der Terminus Wissenstransfer hat in den letzten Jahren verstärkt an Bedeutung gewonnen. Er bezieht sich auf die Zirkulation von Wissen zwischen Systemen, Organisationen oder Parteien, etwa zwischen Hochschulen und Gesellschaft. Damit ist nicht ‚nur‘ der Transfer wissenschaftlicher Erkenntnisse in gesellschaftliche Kontexte gemeint, sondern vielmehr - über den Erwerb und die Weitergabe von Wissen hinaus - der Dialog und die Diskursbildung zwischen Wissenschaft und Gesellschaft. Der vorliegende Band nimmt dabei entstehende Aufgaben, Herausforderungen und Chancen kulturwissenschaftlicher Forschung in den Blick. Entgegen der Annahme, Projekte aus dem Feld der Kulturwissenschaften würden im Bereich des Abstrakten verbleiben, präsentiert er Beispiele kulturwissenschaftlicher Forschung, die Theorie und Praxis berücksichtigen sowie die Verzahnung von theoretischen Erkenntnissen und ihr Mitwirken an gesellschaftlichen Diskursen verdeutlichen. ED - Meier, Rebecca ED - Harmening, Anda-Lisa Martha Josephine Anna ED - Leinfellner, Stefanie ID - 36253 SN - 978-3-534-27585-4 TI - Wissenstransfer. Aufgabe, Herausforderung und Chance kulturwissenschaftlicher Forschung VL - 1 ER - TY - JOUR AB - AlSi casting alloys combine excellent castability with high strength. Hence, this group of alloys is often used in the automotive sector. The challenge for this application is the brittle character of these alloys which leads to cracks during joint formation when mechanical joining technologies are used. A rise in ductility can be achieved by a considerable increase in the solidification rate which results in grain refinement. High solidification rates can be realized in twin–roll casting (TRC) by water-cooled rolls. Therefore, a hypoeutectic EN AC–AlSi9 (for European Norm - aluminum cast product) is manufactured by the TRC process and analyzed. Subsequently, joining investigations are performed on castings in as-cast and heat-treated condition using the self-piercing riveting process considering the joint formation and the load-bearing capacity. Due to the fine microstructure, the crack initiation can be avoided during joining, while maintaining the joining parameters, especially by specimens in heat treatment conditions. Furthermore, due to the extremely fine microstructure, the load-bearing capacity of the joint can be significantly increased in terms of the maximum load-bearing force and the energy absorbed. AU - Neuser, Moritz AU - Kappe, Fabian AU - Ostermeier, Jakob AU - Krüger, Jan Tobias AU - Bobbert, Mathias AU - Meschut, Gerson AU - Schaper, Mirko AU - Grydin, Olexandr ID - 36332 IS - 10 JF - Advanced Engineering Materials KW - Condensed Matter Physics KW - General Materials Science SN - 1438-1656 TI - Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting VL - 24 ER - TY - CHAP AB - Im Zentrum Beitrags steht die Frage nach dem Spezifischen einer Didaktik im Wissenschafts- bzw. Hochschulkontext. Dabei hat die Organisation des Wissenschaftssystems in Disziplinen bzw. disziplinäre Gemeinschaften eine besondere Bedeutung. Disziplinen entwickeln spezifische Praktiken, die das Handeln ihrer Angehörigen prägen und sich in Fachkulturen zeigen. Diese Praktiken werden insbesondere an kommunikativen Artefakten sichtbar. Für Personen außerhalb einer disziplinären Gemeinschaft und ganz besonders für jene, die keinen direkten Bezug zum Wissenschaftssystem haben, sind disziplinäre Praktiken häufig schwer zu erschließen. Unsere Konzeption von Wissenschaftsdidaktik lenkt den Blick auf die impliziten Praktiken wissenschaftlicher Disziplinen. Aufgabe von Wissenschaftsdidaktik ist es dem- nach, erstens die impliziten disziplinären Sinnstrukturen, die hinter bestimmten Prak- tiken stehen und in kommunikativen Handlungen und Artefakten verschlüsselt sind, zu entschlüsseln. Zweitens ist es notwendig, die Wahrnehmung disziplinärer Praktiken durch die Studierenden zu analysieren und Differenzen zum Sinnverstehen von Wissenschaftler:innen zu identifizieren. Ausgehend davon kann dann drittens auf eine Verständigung über die Praktiken und deren Sinngehalt hingearbeitet werden. Der Beitrag formuliert die Grundzüge einer Wissenschaftsdidaktik, welche Verständigung über die Praktiken wissenschaftlicher Disziplinen zu einem Kernbestandteil akademischer Lehre macht. Dazu gehört auch ein Moment von Wissenschaftskritik, das auf die Disziplinen und deren Praktiken selbst zurückwirkt. Wissenschaftsdidaktik in diesem Sinne verlangt, den Blick Dritter auf die Praktiken der eigenen Disziplin einzunehmen. Dazu gehör auch, sich einzugestehen, wenn Praktiken keinen Sinn für wissenschaftliche Erkenntnisprozesse (mehr) aufweisen bzw. diesen verloren haben. AU - Jenert, Tobias AU - Scharlau, Ingrid ED - Reinmann, Gabi ED - Rhein, Rüdiger ID - 33864 KW - Wissenschaftsdidaktik KW - Fachsozialisation KW - Wissenschaftskritik KW - Verständigung KW - Fachkultur KW - akademische Praktiken KW - Unterrichtsfach Psychologie T2 - Wissenschaftsdidaktik I: Einführung TI - Wissenschaftsdidaktik als Verständigung über wissenschaftliches Handeln – eine Auslegeordnung ER - TY - JOUR AU - Jenert, Tobias AU - Scharlau, Ingrid ID - 31678 IS - 2 JF - Zeitschrift für Hochschulentwicklung TI - Wissenschaftskommunikation als Verständigung: Chance für die Hochschulentwicklung?! VL - 17 ER - TY - JOUR AB - Hole polarons and defect-bound exciton polarons in lithium niobate are investigated by means of density-functional theory, where the localization of the holes is achieved by applying the +U approach to the oxygen 2p orbitals. We find three principal configurations of hole polarons: (i) self-trapped holes localized at displaced regular oxygen atoms and (ii) two other configurations bound to a lithium vacancy either at a threefold coordinated oxygen atom above or at a two-fold coordinated oxygen atom below the defect. The latter is the most stable and is in excellent quantitative agreement with measured g factors from electron paramagnetic resonance. Due to the absence of mid-gap states, none of these hole polarons can explain the broad optical absorption centered between 2.5 and 2.8 eV that is observed in transient absorption spectroscopy, but such states appear if a free electron polaron is trapped at the same lithium vacancy as the bound hole polaron, resulting in an exciton polaron. The dielectric function calculated by solving the Bethe–Salpeter equation indeed yields an optical peak at 2.6 eV in agreement with the two-photon experiments. The coexistence of hole and exciton polarons, which are simultaneously created in optical excitations, thus satisfactorily explains the reported experimental data. AU - Schmidt, Falko AU - Kozub, Agnieszka L. AU - Gerstmann, Uwe AU - Schmidt, Wolf Gero AU - Schindlmayr, Arno ID - 44088 IS - 11 JF - Crystals TI - A density-functional theory study of hole and defect-bound exciton polarons in lithium niobate VL - 12 ER - TY - CHAP AU - Bauer, Anna AU - Sacher, Marc AU - Habig, Sebastian AU - Fechner, Sabine ED - Neiske, Iris ED - Osthushenrich, Judith ED - Schaper, Niclas ED - Trier, Ulrike ED - Vöing, Nerea ID - 24935 T2 - Hochschule auf Abstand. Ein multiperspektivischer Zugang zur digitalen Lehre TI - Laborpraktika auf Distanz. Ansätze in den Naturwissenschaften VL - 3 ER - TY - CONF AU - Křivská, B AU - Šlapáková, M AU - Králík, R AU - Bajtošová, L AU - Cieslar, M AU - Grydin, Olexandr AU - Stolbchenko, M AU - Schaper, Mirko ID - 25047 SN - 1757-899X T2 - IOP Conference Series: Materials Science and Engineering TI - Resistivity and Formation of Intermetallic Layer in Aluminum-Steel Clad Strip VL - 1178 ER - TY - JOUR AB - The nonlinear process of second harmonic generation (SHG) in monolayer (1L) transition metal dichalcogenides (TMD), like WS2, strongly depends on the polarization state of the excitation light. By combination of plasmonic nanostructures with 1L-WS2 by transferring it onto a plasmonic nanoantenna array, a hybrid metasurface is realized impacting the polarization dependency of its SHG. Here, we investigate how plasmonic dipole resonances affect the process of SHG in plasmonic–TMD hybrid metasurfaces by nonlinear spectroscopy. We show that the polarization dependency is affected by the lattice structure of plasmonic nanoantenna arrays as well as by the relative orientation between the 1L-WS2 and the individual plasmonic nanoantennas. In addition, such hybrid metasurfaces show SHG in polarization states, where SHG is usually forbidden for either 1L-WS2 or plasmonic nanoantennas. By comparing the SHG in these channels with the SHG generated by the hybrid metasurface components, we detect an enhancement of the SHG signal by a factor of more than 40. Meanwhile, an attenuation of the SHG signal in usually allowed polarization states is observed. Our study provides valuable insight into hybrid systems where symmetries strongly affect the SHG and enable tailored SHG in 1L-WS2 for future applications. AU - Spreyer, Florian AU - Ruppert, Claudia AU - Georgi, Philip AU - Zentgraf, Thomas ID - 25605 IS - 10 JF - ACS Nano SN - 1936-0851 TI - Influence of Plasmon Resonances and Symmetry Effects on Second Harmonic Generation in WS2–Plasmonic Hybrid Metasurfaces VL - 15 ER - TY - CONF AU - Gottschalk, Sebastian AU - Kirchhoff, Jonas AU - Engels, Gregor ED - Shishkov, Boris ID - 20244 T2 - Business Modeling and Software Design TI - Extending Business Model Development Tools with Consolidated Expert Knowledge ER - TY - JOUR AB - N-body methods are one of the essential algorithmic building blocks of high-performance and parallel computing. Previous research has shown promising performance for implementing n-body simulations with pairwise force calculations on FPGAs. However, to avoid challenges with accumulation and memory access patterns, the presented designs calculate each pair of forces twice, along with both force sums of the involved particles. Also, they require large problem instances with hundreds of thousands of particles to reach their respective peak performance, limiting the applicability for strong scaling scenarios. This work addresses both issues by presenting a novel FPGA design that uses each calculated force twice and overlaps data transfers and computations in a way that allows to reach peak performance even for small problem instances, outperforming previous single precision results even in double precision, and scaling linearly over multiple interconnected FPGAs. For a comparison across architectures, we provide an equally optimized CPU reference, which for large problems actually achieves higher peak performance per device, however, given the strong scaling advantages of the FPGA design, in parallel setups with few thousand particles per device, the FPGA platform achieves highest performance and power efficiency. AU - Menzel, Johannes AU - Plessl, Christian AU - Kenter, Tobias ID - 28099 IS - 1 JF - ACM Transactions on Reconfigurable Technology and Systems SN - 1936-7406 TI - The Strong Scaling Advantage of FPGAs in HPC for N-body Simulations VL - 15 ER - TY - CONF AU - Triebus, Marcel AU - Reitz, Alexander AU - Grydin, Olexandr AU - Grenz, Julian AU - Schneidt, Andreas AU - Erhardt, Rüdiger AU - Tröster, Thomas AU - Schaper, Mirko ID - 28440 T2 - 13th European LS-DYNA Conference 2021 TI - Forming Simulation of Tailored Press Hardened Parts ER - TY - JOUR AU - Droß, M. AU - Heyser, Per AU - Meschut, Gerson AU - Hürkamp, A. AU - Dröder, K. ID - 28448 JF - Journal of Advanced Joining Processes SN - 2666-3309 TI - Fiber response to pin penetration in dry woven fabric using numerical analysis ER - TY - GEN AU - Moritzer, Elmar AU - Hecker, Felix AU - Hirsch, André ID - 24095 IS - 2 T2 - Kunststoffland NRW report TI - Aus der Forschung in die Anwendung - Materialqualifizierung im Kunststoff Freiformen VL - 2021 ER - TY - CONF AB - This paper deals with a novel method for the online fitting of a microscopic traffic simulation model to the current state of a real world traffic area. The traffic state estimation is based on limited data of different measurement sources and guarantees general accordance of reality and simulation in terms of multimodal road traffic counts and vehicle speeds. The research is embedded in the challenge of improving the traffic by controlling the traffic light systems (TLS) of the examined area. Therefore, the current traffic state and the predicted route choices of individual road users are the matter of interest. The concept is generally transferable to any road traffic system. To give an impression of the accuracy and potential of the approach, the validation and first application results are presented. AU - Malena, Kevin AU - Link, Christopher AU - Mertin, Sven AU - Gausemeier, Sandra AU - Trächtler, Ansgar ID - 24166 SN - 978-1-7281-7584-3 T2 - 2021 IEEE Transportation Electrification Conference & Expo (ITEC) TI - Validation of an Online State Estimation Concept for Microscopic Traffic Simulations◆ ER - TY - CONF AU - zur Heiden, Philipp AU - Priefer, Jennifer ED - Breitner, Michael H. ED - Lehnhoff, Sebastian ED - Nieße, Astrid ED - Staudt, Philipp ED - Weinhardt, Christof ED - Werth, Oliver ID - 24534 T2 - Pre-Conference 16th International Congress on Wirtschaftsinformatik at Universität Duisburg-Essen TI - Transitioning to Condition-Based Maintenance on the Distribution Grid: Deriving Design Principles from a Qualitative Study ER - TY - JOUR AU - Lahme, Simon AU - Bauer, Anna AU - Reinhold, Peter ID - 26039 JF - Phydid B, Didaktik der Physik, Beiträge zur DPG-Frühjahrstagung TI - Ansätze zur Diagnose und Förderung von Problemlösefähigkeiten in der Studieneingangsphase Physik ER - TY - CONF AU - Pollmeier, Pascal AU - Fechner, Sabine ED - Habig, Sebastian ID - 26718 T2 - Naturwissenschaftlicher Unterricht und Lehrerbildung im Umbruch? TI - Erweiterung des epistemologischen Verständnisses durch Konfrontation mit anomalen Daten. ER - TY - THES AB - Previous research in proof-carrying hardware has established the feasibility and utility of the approach, and provided a concrete solution for employing it for the certification of functional equivalence checking against a specification, but fell short in connecting it to state-of-the-art formal verification insights, methods and tools. Due to the immense complexity of modern circuits, and verification challenges such as the state explosion problem for sequential circuits, this restriction of readily-available verification solutions severely limited the applicability of the approach in wider contexts. This thesis closes the gap between the PCH approach and current advances in formal hardware verification, provides methods and tools to express and certify a wide range of circuit properties, both functional and non-functional, and presents for the first time prototypes in which circuits that are implemented on actual reconfigurable hardware are verified with PCH methods. Using these results, designers can now apply PCH to establish trust in more complex circuits, by using more diverse properties which they can express using modern, efficient property specification techniques. AU - Wiersema, Tobias ID - 26746 KW - Proof-Carrying Hardware KW - Formal Verification KW - Sequential Circuits KW - Non-Functional Properties KW - Functional Properties TI - Guaranteeing Properties of Reconfigurable Hardware Circuits with Proof-Carrying Hardware ER - TY - JOUR AU - Bothe, Mike AU - Lutters, Nicole AU - Kenig, Eugeny ID - 28989 JF - Chemical Engineering Transactions TI - Examination of hazardous situations in industrial closed-loop processes using dynamic simulations ER - TY - GEN AU - Eberbach, Jelena AU - Sureth-Sloane, Caren AU - Uhrig-Homburg, Marliese ID - 29057 TI - Option Implied Tax Rate Expectations ER - TY - JOUR AB - Due to the lack of established real-world benchmark suites for static taint analyses of Android applications, evaluations of these analyses are often restricted and hard to compare. Even in evaluations that do use real-world apps, details about the ground truth in those apps are rarely documented, which makes it difficult to compare and reproduce the results. To push Android taint analysis research forward, this paper thus recommends criteria for constructing real-world benchmark suites for this specific domain, and presents TaintBench, the first real-world malware benchmark suite with documented taint flows. TaintBench benchmark apps include taint flows with complex structures, and addresses static challenges that are commonly agreed on by the community. Together with the TaintBench suite, we introduce the TaintBench framework, whose goal is to simplify real-world benchmarking of Android taint analyses. First, a usability test shows that the framework improves experts’ performance and perceived usability when documenting and inspecting taint flows. Second, experiments using TaintBench reveal new insights for the taint analysis tools Amandroid and FlowDroid: (i) They are less effective on real-world malware apps than on synthetic benchmark apps. (ii) Predefined lists of sources and sinks heavily impact the tools’ accuracy. (iii) Surprisingly, up-to-date versions of both tools are less accurate than their predecessors. AU - Luo, Linghui AU - Pauck, Felix AU - Piskachev, Goran AU - Benz, Manuel AU - Pashchenko, Ivan AU - Mory, Martin AU - Bodden, Eric AU - Hermann, Ben AU - Massacci, Fabio ID - 27045 JF - Empirical Software Engineering SN - 1382-3256 TI - TaintBench: Automatic real-world malware benchmarking of Android taint analyses ER - TY - CONF AU - Lugovtsova, Yevgeniya AU - Zeipert, Henning AU - Johannesmann, Sarah AU - Nicolai, Marcel AU - Prager, Jens AU - Henning, Bernd ID - 27847 T2 - МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская школа-конференция TI - К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН ER - TY - JOUR AB - ZusammenfassungLehrkräftekooperation wird generell eine positive Bedeutung in Bezug auf Schul- und Unterrichtsentwicklung zugeschrieben. Dabei sind empirische Belege für eine positive Wirksamkeit nach wie vor kaum vorhanden, es gibt sogar Befunde zu ‚negativen‘ Konsequenzen von Lehrkräftekooperation. Um diese Widersprüchlichkeit zu klären, wurde in der vorliegenden Arbeit Kooperation nicht als Instrument bzw. als Technik betrachtet, sondern als soziale Praxis verstanden, in der eigenlogisches, kollektiv-implizites Wissen (re)produziert wird (Community of Practice). Parallel dazu wurde ein praxeologisches Kompetenzverständnis (Praxiskompetenz) eingeführt, das wesentlich auf die Praxeologie Pierre Bourdieus zurückgeht und den Zusammenhang zwischen Lehrkräftekooperation als Community of Practice und kollektiv strukturierter, individueller Kompetenz theoretisch verdeutlicht. Die empirischen Befunde, welche mittels der Dokumentarischen Methode generiert wurden, verweisen auf die Bedeutung unterschiedlicher Relationslogiken (Nicht-Passung, Entfaltung, Herausforderung) für das ‚Lernen‘ von oder innerhalb von Praxiskompetenz(en) und damit auch auf die Wichtigkeit einer grundlegend kollektiv gerahmten Perspektive auf Lehrkräftekooperation. Vor diesem Hintergrund ist ein allzu positiver Blick auf Lehrkräftekooperationsprozesse kritisch zu betrachten. AU - Bloh, Thiemo ID - 27881 JF - Zeitschrift für Bildungsforschung SN - 2190-6890 TI - Entwicklung von Praxiskompetenz durch Kooperationsprozesse von Lehrkräften ER - TY - JOUR AB - The machine recognition of speech spoken at a distance from the microphones, known as far-field automatic speech recognition (ASR), has received a significant increase of attention in science and industry, which caused or was caused by an equally significant improvement in recognition accuracy. Meanwhile it has entered the consumer market with digital home assistants with a spoken language interface being its most prominent application. Speech recorded at a distance is affected by various acoustic distortions and, consequently, quite different processing pipelines have emerged compared to ASR for close-talk speech. A signal enhancement front-end for dereverberation, source separation and acoustic beamforming is employed to clean up the speech, and the back-end ASR engine is robustified by multi-condition training and adaptation. We will also describe the so-called end-to-end approach to ASR, which is a new promising architecture that has recently been extended to the far-field scenario. This tutorial article gives an account of the algorithms used to enable accurate speech recognition from a distance, and it will be seen that, although deep learning has a significant share in the technological breakthroughs, a clever combination with traditional signal processing can lead to surprisingly effective solutions. AU - Haeb-Umbach, Reinhold AU - Heymann, Jahn AU - Drude, Lukas AU - Watanabe, Shinji AU - Delcroix, Marc AU - Nakatani, Tomohiro ID - 21065 IS - 2 JF - Proceedings of the IEEE TI - Far-Field Automatic Speech Recognition VL - 109 ER - TY - CONF AU - Kucklick, Jan-Peter AU - Müller, Oliver ID - 21204 T2 - The AAAI-21 Workshop on Knowledge Discovery from Unstructured Data in Financial Services TI - A Comparison of Multi-View Learning Strategies for Satellite Image-based Real Estate Appraisal ER - TY - JOUR AB - We present a flexible trust region descend algorithm for unconstrained and convexly constrained multiobjective optimization problems. It is targeted at heterogeneous and expensive problems, i.e., problems that have at least one objective function that is computationally expensive. The method is derivative-free in the sense that neither need derivative information be available for the expensive objectives nor are gradients approximated using repeated function evaluations as is the case in finite-difference methods. Instead, a multiobjective trust region approach is used that works similarly to its well-known scalar pendants. Local surrogate models constructed from evaluation data of the true objective functions are employed to compute possible descent directions. In contrast to existing multiobjective trust region algorithms, these surrogates are not polynomial but carefully constructed radial basis function networks. This has the important advantage that the number of data points scales linearly with the parameter space dimension. The local models qualify as fully linear and the corresponding general scalar framework is adapted for problems with multiple objectives. Convergence to Pareto critical points is proven and numerical examples illustrate our findings. AU - Berkemeier, Manuel Bastian AU - Peitz, Sebastian ID - 21337 IS - 2 JF - Mathematical and Computational Applications TI - Derivative-Free Multiobjective Trust Region Descent Method Using Radial Basis Function Surrogate Models VL - 26 ER - TY - JOUR AU - Frese, Daniel AU - Wei, Qunshuo AU - Wang, Yongtian AU - Cinchetti, Mirko AU - Huang, Lingling AU - Zentgraf, Thomas ID - 21475 IS - 4 JF - ACS Photonics SN - 2330-4022 TI - Nonlinear Bicolor Holography Using Plasmonic Metasurfaces VL - 8 ER - TY - CONF AB - Services often consist of multiple chained components such as microservices in a service mesh, or machine learning functions in a pipeline. Providing these services requires online coordination including scaling the service, placing instance of all components in the network, scheduling traffic to these instances, and routing traffic through the network. Optimized service coordination is still a hard problem due to many influencing factors such as rapidly arriving user demands and limited node and link capacity. Existing approaches to solve the problem are often built on rigid models and assumptions, tailored to specific scenarios. If the scenario changes and the assumptions no longer hold, they easily break and require manual adjustments by experts. Novel self-learning approaches using deep reinforcement learning (DRL) are promising but still have limitations as they only address simplified versions of the problem and are typically centralized and thus do not scale to practical large-scale networks. To address these issues, we propose a distributed self-learning service coordination approach using DRL. After centralized training, we deploy a distributed DRL agent at each node in the network, making fast coordination decisions locally in parallel with the other nodes. Each agent only observes its direct neighbors and does not need global knowledge. Hence, our approach scales independently from the size of the network. In our extensive evaluation using real-world network topologies and traffic traces, we show that our proposed approach outperforms a state-of-the-art conventional heuristic as well as a centralized DRL approach (60% higher throughput on average) while requiring less time per online decision (1 ms). AU - Schneider, Stefan Balthasar AU - Qarawlus, Haydar AU - Karl, Holger ID - 21543 KW - network management KW - service management KW - coordination KW - reinforcement learning KW - distributed T2 - IEEE International Conference on Distributed Computing Systems (ICDCS) TI - Distributed Online Service Coordination Using Deep Reinforcement Learning ER - TY - GEN AB - Die kontinuierliche Weiterentwicklung des eigenen Geschäftsmodells ist für eine Organisation von entscheidender Bedeutung, um wettbewerbsfähig und somit nachhaltig erfolgreich zu bleiben. Während für die Entwicklung neuer Geschäftsmodelle häufig Workshops und einfache Software-Tools zur Visualisierung genutzt werden, wurden in der Forschung bereits erste Ansätze von datengetriebener Geschäftsmodellentwicklung (GME) vorgestellt. Diese Ansätze nutzen dabei Daten, Informationen oder auch Wissen aus internen und externen Unternehmensquellen, um den GME-Prozess zu unterstützen. Innerhalb dieses Beitrags zeigen wir einige Ansätze aus der aktuellen Literatur und analysieren wie ihre Datennutzung den GME-Prozess unterstützt. Weiterhin stellen wir mit dem BMDL Feature Modeler ein Tool vor, welches den GME-Prozess mit Expertenwissen unterstützt. AU - Gottschalk, Sebastian AU - Yigitbas, Enes ID - 21569 TI - Von datenbasierter zu datengetriebener Geschäftsmodellentwicklung: Ein Überblick über Software-Tools und deren Datennutzung VL - 1 ER - TY - GEN AB - The invention describes a distributed merchandise management system, in which the client, retailer and the manufacturer are linked by a network. This is implemented by a cloud storage (105), the cloud storage (105) comprising a means (105 a) for storing data, a means for receiving first data from a first network node (110), the first data being associated with a physical object, a means for receiving request data from a second network node (120), a means for receiving second data from a third network node (130), the second data being associated with the first data and comprising at least one data piece adapted to change the first data depending on the received request data, a means for changing the first data based at least in part on the second data and the request data, and a means for sending a changed portion of the first data from the cloud storage (105) to the first network node (110). AU - Göllner, Thomas AU - Schwarz, Jan-Hendrik AU - Gottschalk, Sebastian AU - Sauer, Stefan ID - 21601 TI - Distributed merchandise management system ER - TY - JOUR AB - Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data. It describes the problem of splitting a secret into different shares, without revealing any information to its shareholders. Here, we demonstrate an all-optical solution for secret sharing based on metasurface holography. In our concept, metasurface holograms are used as spatially separable shares that carry encrypted messages in the form of holographic images. Two of these shares can be recombined by bringing them close together. Light passing through this stack of metasurfaces accumulates the phase shift of both holograms and optically reconstructs the secret with high fidelity. In addition, the hologram generated by each single metasurface can uniquely identify its shareholder. Furthermore, we demonstrate that the inherent translational alignment sensitivity between two stacked metasurface holograms can be used for spatial multiplexing, which can be further extended to realize optical rulers. AU - Georgi, Philip AU - Wei, Qunshuo AU - Sain, Basudeb AU - Schlickriede, Christian AU - Wang, Yongtian AU - Huang, Lingling AU - Zentgraf, Thomas ID - 21631 IS - 16 JF - Science Advances SN - 2375-2548 TI - Optical secret sharing with cascaded metasurface holography VL - 7 ER - TY - CONF AU - Lienen, Julian AU - Hüllermeier, Eyke ID - 21637 IS - 10 T2 - Proceedings of the 35th AAAI Conference on Artificial Intelligence, AAAI TI - From Label Smoothing to Label Relaxation VL - 35 ER - TY - CONF AB - The development of effective business models is an essential task in highly competitive markets like mobile ecosystems. Existing development methods for these business models do not specifically focus that the development process profoundly depends on the situation (e.g., market size, regulations) of the mobile app developer. Here, a mismatch between method and situation can lead to poor resource management and longer development cycles. In software engineering, situational method engineering is used for software projects to configure a development method out of a method repository based on the project situation. Analogously, we support creating situation-specific business model development methods with a method base and new user roles. Here, the method engineer obtains the knowledge of the domain expert and stores it in the method base as elements, building blocks, and patterns. The expert knowledge is derived from a grey literature review on mobile development processes. After this, the method engineer constructs the development method based on the described situation of the business developer. We provide an open-source tool and evaluate it by constructing a local event platform's business model development method. AU - Gottschalk, Sebastian AU - Yigitbas, Enes AU - Nowosad, Alexander AU - Engels, Gregor ID - 21639 KW - Business Model Development KW - Situational Method Engineering KW - Mobile App KW - Business Model Development Tools T2 - Enterprise, Business-Process and Information Systems Modeling TI - Situation-specific Business Model Development Methods for Mobile App Developers ER - TY - JOUR AB - Modern and flexible application-level software platforms increase the attack surface of connected vehicles and thereby require automotive engineers to adopt additional security control techniques. These techniques encompass host-based intrusion detection systems (HIDSs) that detect suspicious activities in application contexts. Such application-aware HIDSs originate in information and communications technology systems and have a great potential to deal with the flexible nature of application-level software platforms. However, the elementary characteristics of known application-aware HIDS approaches and thereby the implications for their transfer to the automotive sector are unclear. In previous work, we presented a systematic literature review (SLR) covering the state of the art of application-aware HIDS approaches. We synthesized our findings by means of a fine-grained classification for each approach specified through a feature model and corresponding variant models. These models represent the approaches’ elementary characteristics. Furthermore, we summarized key findings and inferred implications for the transfer of application-aware HIDSs to the automotive sector. In this article, we extend the previous work by several aspects. We adjust the quality evaluation process within the SLR to be able to consider high quality conference publications, which results in an extended final pool of publications. For supporting HIDS developers on the task of configuring HIDS analysis techniques based on machine learning, we report on initial results on the applicability of AutoML. Furthermore, we present lessons learned regarding the application of the feature and variant model approach for SLRs. Finally, we more thoroughly describe the SLR study design. AU - Schubert, David AU - Eikerling, Hendrik AU - Holtmann, Jörg ID - 23526 JF - Frontiers in Computer Science SN - 2624-9898 TI - Application-Aware Intrusion Detection: A Systematic Literature Review, Implications for Automotive Systems, and Applicability of AutoML VL - 3 ER - TY - CONF AU - Nouri, Zahra AU - Gadiraju, Ujwal AU - Engels, Gregor AU - Wachsmuth, Henning ID - 23708 T2 - Proceedings of the 32nd ACM Conference on Hypertext and Social Media TI - What Is Unclear? Computational Assessment of Task Clarity in Crowdsourcing ER - TY - CONF AB - The laser sintering process has been a well-established AM process for many years. Disadvantages of LS are the low material variety and the thermal damage of the unprocessed material. The low temperature laser sintering attacks at this point and processes powder material at a build chamber temperature lower than the recrystallization temperature. This drastic reduction in temperature results in significantly less thermal damage to the material. This work deals with the low temperature laser sintering of Polyamide 12 (PA12) on a commercial, unmodified laser sintering system to compare it to standard laser sintered PA12 and to create the basis for low temperature laser sintering of high temperature materials on such a system. First results by changing the exposure parameters and by fixing parts on a building platform show a processing of PA12 on an EOS P396 at a build chamber temperature less than 100 °C instead of standard approx. 175 °C. AU - Menge, Dennis AU - Schmid, Hans-Joachim ID - 23760 KW - Low Temp LS KW - Low Temperature Laser Sintering KW - Polyamid 12 TI - Low Temperature Laser Sintering on a Standard System: First Attempts and Results with PA12 ER - TY - JOUR AB - GaAs-(111)-nanostructures exhibiting second harmonic generation are new building blocks in nonlinear optics. Such structures can be fabricated through epitaxial lift-off using selective etching of Al-containing layers and subsequent transfer to glass substrates. Herein, the selective etching of (111)B-oriented AlxGa1−xAs sacrificial layers (10–50 nm thick) with different aluminum concentrations (x = 0.5–1.0) in 10\% hydrofluoric acid is investigated and compared with standard (100)-oriented structures. The thinner the sacrificial layer and the lower the aluminum content, the lower the lateral etch rate. For both orientations, the lateral etch rates are in the same order of magnitude, but some quantitative differences exist. Furthermore, the epitaxial lift-off, the transfer, and the nanopatterning of thin (111)B-oriented GaAs membranes are demonstrated. Atomic force microscopy and high-resolution X-ray diffraction measurements reveal the high structural quality of the transferred GaAs-(111) films. AU - Henksmeier, Tobias AU - Eppinger, Martin AU - Reineke, Bernhard AU - Zentgraf, Thomas AU - Meier, Cedrik AU - Reuter, Dirk ID - 20592 IS - 3 JF - physica status solidi (a) KW - epitaxial lift-off KW - GaAs/AlxGa1−xAs heterostructures KW - selective etching TI - Selective Etching of (111)B-Oriented AlxGa1−xAs-Layers for Epitaxial Lift-Off VL - 218 ER - TY - CONF AB - In practical, large-scale networks, services are requested by users across the globe, e.g., for video streaming. Services consist of multiple interconnected components such as microservices in a service mesh. Coordinating these services requires scaling them according to continuously changing user demand, deploying instances at the edge close to their users, and routing traffic efficiently between users and connected instances. Network and service coordination is commonly addressed through centralized approaches, where a single coordinator knows everything and coordinates the entire network globally. While such centralized approaches can reach global optima, they do not scale to large, realistic networks. In contrast, distributed approaches scale well, but sacrifice solution quality due to their limited scope of knowledge and coordination decisions. To this end, we propose a hierarchical coordination approach that combines the good solution quality of centralized approaches with the scalability of distributed approaches. In doing so, we divide the network into multiple hierarchical domains and optimize coordination in a top-down manner. We compare our hierarchical with a centralized approach in an extensive evaluation on a real-world network topology. Our results indicate that hierarchical coordination can find close-to-optimal solutions in a fraction of the runtime of centralized approaches. AU - Schneider, Stefan Balthasar AU - Jürgens, Mirko AU - Karl, Holger ID - 20693 KW - network management KW - service management KW - coordination KW - hierarchical KW - scalability KW - nfv T2 - IFIP/IEEE International Symposium on Integrated Network Management (IM) TI - Divide and Conquer: Hierarchical Network and Service Coordination ER - TY - CONF AU - Gottschalk, Sebastian ID - 22155 T2 - Advanced Software Engineering. Doctorial Consortium TI - Situation-specific Development of Business Models for Services in Software Ecosystems ER - TY - CONF AB - Word embedding models reflect bias towards genders, ethnicities, and other social groups present in the underlying training data. Metrics such as ECT, RNSB, and WEAT quantify bias in these models based on predefined word lists representing social groups and bias-conveying concepts. How suitable these lists actually are to reveal bias - let alone the bias metrics in general - remains unclear, though. In this paper, we study how to assess the quality of bias metrics for word embedding models. In particular, we present a generic method, Bias Silhouette Analysis (BSA), that quantifies the accuracy and robustness of such a metric and of the word lists used. Given a biased and an unbiased reference embedding model, BSA applies the metric systematically for several subsets of the lists to the models. The variance and rate of convergence of the bias values of each model then entail the robustness of the word lists, whereas the distance between the models' values gives indications of the general accuracy of the metric with the word lists. We demonstrate the behavior of BSA on two standard embedding models for the three mentioned metrics with several word lists from existing research. AU - Spliethöver, Maximilian AU - Wachsmuth, Henning ID - 22156 T2 - Proceedings of the Thirtieth International Joint Conference on Artificial Intelligence, IJCAI-21 TI - Bias Silhouette Analysis: Towards Assessing the Quality of Bias Metrics for Word Embedding Models ER - TY - CONF AU - Syed, Shahbaz AU - Al-Khatib, Khalid AU - Alshomary, Milad AU - Wachsmuth, Henning AU - Potthast, Martin ID - 22158 T2 - Proceedings of the Joint Conference of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (ACL-IJCNLP 2021): Findings TI - Generating Informative Conclusions for Argumentative Texts ER - TY - CONF AU - Barrow, Joe AU - Jain, Rajiv AU - Lipka, Nedim AU - Dernoncourt, Franck AU - Morariu, Vlad AU - Manjunatha, Varun AU - Oard, Douglas AU - Resnik, Philip AU - Wachsmuth, Henning ID - 22159 T2 - Proceedings of the Joint Conference of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (ACL-IJCNLP 2021) TI - Syntopical Graphs for Computational Argumentation Tasks ER - TY - GEN AU - Schott, Stefan ID - 22304 TI - Android App Analysis Benchmark Case Generation ER - TY - JOUR AB - We realize and investigate a nonlinear metasurface taking advantage of intersubband transitions in ultranarrow GaN/AlN multi-quantum well heterostructures. Owing to huge band offsets, the structures offer resonant transitions in the telecom window around 1.55 µm. These heterostructures are functionalized with an array of plasmonic antennas featuring cross-polarized resonances at these near-infrared wavelengths and their second harmonic. This kind of nonlinear metasurface allows for substantial second-harmonic generation at normal incidence which is completely absent for an antenna array without the multi-quantum well structure underneath. While the second harmonic is originally radiated only into the plane of the quantum wells, a proper geometrical arrangement of the plasmonic elements permits the redirection of the second-harmonic light to free-space radiation, which is emitted perpendicular to the surface. AU - Mundry, Jan AU - Spreyer, Florian AU - Jmerik, Valentin AU - Ivanov, Sergey AU - Zentgraf, Thomas AU - Betz, Markus ID - 22450 IS - 7 JF - Optical Materials Express SN - 2159-3930 TI - Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays VL - 11 ER - TY - GEN AB - Self-training is an effective approach to semi-supervised learning. The key idea is to let the learner itself iteratively generate "pseudo-supervision" for unlabeled instances based on its current hypothesis. In combination with consistency regularization, pseudo-labeling has shown promising performance in various domains, for example in computer vision. To account for the hypothetical nature of the pseudo-labels, these are commonly provided in the form of probability distributions. Still, one may argue that even a probability distribution represents an excessive level of informedness, as it suggests that the learner precisely knows the ground-truth conditional probabilities. In our approach, we therefore allow the learner to label instances in the form of credal sets, that is, sets of (candidate) probability distributions. Thanks to this increased expressiveness, the learner is able to represent uncertainty and a lack of knowledge in a more flexible and more faithful manner. To learn from weakly labeled data of that kind, we leverage methods that have recently been proposed in the realm of so-called superset learning. In an exhaustive empirical evaluation, we compare our methodology to state-of-the-art self-supervision approaches, showing competitive to superior performance especially in low-label scenarios incorporating a high degree of uncertainty. AU - Lienen, Julian AU - Hüllermeier, Eyke ID - 22509 T2 - arXiv:2106.11853 TI - Credal Self-Supervised Learning ER - TY - CONF AU - Kucklick, Jan-Peter AU - Müller, Jennifer AU - Beverungen, Daniel AU - Müller, Oliver ID - 22514 T2 - European Conference on Information Systems TI - Quantifying the Impact of Location Data for Real Estate Appraisal – A GIS-based Deep Learning Approach ER - TY - JOUR AU - Triebus, Marcel AU - Gierse, Jan AU - Marten, Thorsten AU - Tröster, Thomas ID - 22518 JF - IOP Conference Series: Materials Science and Engineering SN - 1757-8981 TI - A new Device for Determination of Forming-Limit-Curves under Hot-Forming Conditions ER - TY - JOUR AB - The containment of COVID-19 critically hinges on individuals’ behavior. We investigate how individuals react to variations in COVID-19 reporting. Using a survey, we elicit individuals' perceived infection risk given various COVID-19 metrics (e.g., confirmed cases, reproduction rate, or case-fatality ratio). We proxy individuals' risk perception with their willingness to pay for the participation in everyday life and amusements events. We find that participants react to different COVID-19 metrics with varying sensitivity. We observe a saturation of sensitivity for several measures at critical limits used in the political discussion, making our results highly relevant for policy makers in their efforts to direct individuals to adhere to hygienic etiquette and social distancing guidelines. AU - Warkulat, Sonja AU - Krull, Sebastian AU - Ortmann, Regina AU - Klocke, Nina AU - Pelster, Matthias ID - 22523 IS - 83 JF - Covid Economics KW - COVID-19 reporting KW - willingness to pay KW - willingness to accept TI - COVID-19 reporting and willingness to pay for leisure activities ER - TY - JOUR AB - Modern services consist of interconnected components,e.g., microservices in a service mesh or machine learning functions in a pipeline. These services can scale and run across multiple network nodes on demand. To process incoming traffic, service components have to be instantiated and traffic assigned to these instances, taking capacities, changing demands, and Quality of Service (QoS) requirements into account. This challenge is usually solved with custom approaches designed by experts. While this typically works well for the considered scenario, the models often rely on unrealistic assumptions or on knowledge that is not available in practice (e.g., a priori knowledge). We propose DeepCoord, a novel deep reinforcement learning approach that learns how to best coordinate services and is geared towards realistic assumptions. It interacts with the network and relies on available, possibly delayed monitoring information. Rather than defining a complex model or an algorithm on how to achieve an objective, our model-free approach adapts to various objectives and traffic patterns. An agent is trained offline without expert knowledge and then applied online with minimal overhead. Compared to a state-of-the-art heuristic, DeepCoord significantly improves flow throughput (up to 76%) and overall network utility (more than 2x) on realworld network topologies and traffic traces. It also supports optimizing multiple, possibly competing objectives, learns to respect QoS requirements, generalizes to scenarios with unseen, stochastic traffic, and scales to large real-world networks. For reproducibility and reuse, our code is publicly available. AU - Schneider, Stefan Balthasar AU - Khalili, Ramin AU - Manzoor, Adnan AU - Qarawlus, Haydar AU - Schellenberg, Rafael AU - Karl, Holger AU - Hecker, Artur ID - 21808 JF - Transactions on Network and Service Management KW - network management KW - service management KW - coordination KW - reinforcement learning KW - self-learning KW - self-adaptation KW - multi-objective TI - Self-Learning Multi-Objective Service Coordination Using Deep Reinforcement Learning ER - TY - JOUR AB - Sowohl Berufsethos als auch Berufswahlmotivation tragen zu relevanten lern-, leistungs- und laufbahnbedingenden Prozessen eines Individuums bei und prägen dessen Lebensverlauf wesentlich. Während die Berufswahlmotivation bereits verstärkt im wirtschaftspädagogischen Kontext untersucht wurde, existieren zum Berufsethos von Wirtschaftspädagog*innen nur vereinzelt empirische Studien. So ist beispielsweise wenig darüber bekannt, wie das Berufsethos von Wirtschaftspädagog*innen in der Ausbildungsphase ausgeprägt ist. Auch die Erforschung des Zusammenhangs zwischen den Konstrukten des Berufsethos und der Berufswahlmotivation blieb bisher unbeachtet. In diesem Beitrag wird entsprechend dieses Forschungsdesiderats untersucht, wie das anfänglich ausgebildete Berufsethos von Wirtschaftspädagogikstudierenden in der universitären Ausbildung ausgeprägt ist, ob sich die Ausprägung nach dem angegebenen Berufswunsch der Studierenden unterscheidet und inwiefern das anfänglich ausgeprägte Berufsethos mit der Berufswahlmotivation von Studierenden zusammenhängt. Dafür wurden im Wintersemester 2019/20 an zwölf deutschen Universitäten insgesamt 879 Wirtschaftspädagogikstudierende schriftlich befragt. Die Ergebnisse zeigen, dass das anfängliche Berufsethos der Befragten bereits in der universitären Ausbildungsphase relativ stark ausgeprägt ist. Weiterhin ist zu erkennen, dass das Berufsethos bei angehenden Wirtschaftspädagog*innen, die den Berufswunsch Lehrkraft haben, ausgeprägter ist als bei Wirtschaftspädagogikstudierenden, die eine Tätigkeit außerhalb des Schuldienstes anstreben bzw. noch unentschlossen sind. Letztlich kann aufgezeigt werden, dass grundsätzlich positive Zusammenhänge zwischen dem anfänglich ausgeprägten Berufsethos und der Berufswahlmotivation von angehenden Wirtschaftspädagog*innen bestehen. AU - Goller, Michael AU - Ziegler, Simone ID - 21815 JF - bwp@ Spezial KW - Berufsethos KW - Berufswahlmotivation KW - Wirtschaftspädagogik KW - Studierende SN - 1618-8543 TI - Zum Zusammenhang von Berufsethos und der Berufswahlmotivation angehender Wirtschaftspädagog*innen VL - 18 ER - TY - JOUR AB - The reduction of high-dimensional systems to effective models on a smaller set of variables is an essential task in many areas of science. For stochastic dynamics governed by diffusion processes, a general procedure to find effective equations is the conditioning approach. In this paper, we are interested in the spectrum of the generator of the resulting effective dynamics, and how it compares to the spectrum of the full generator. We prove a new relative error bound in terms of the eigenfunction approximation error for reversible systems. We also present numerical examples indicating that, if Kramers–Moyal (KM) type approximations are used to compute the spectrum of the reduced generator, it seems largely insensitive to the time window used for the KM estimators. We analyze the implications of these observations for systems driven by underdamped Langevin dynamics, and show how meaningful effective dynamics can be defined in this setting. AU - Nüske, Feliks AU - Koltai, Péter AU - Boninsegna, Lorenzo AU - Clementi, Cecilia ID - 21820 JF - Entropy SN - 1099-4300 TI - Spectral Properties of Effective Dynamics from Conditional Expectations ER - TY - JOUR AB - Gaussian-beam-like bundles of semi-guided waves propagating in a dielectric slab can excite modes with high-order optical angular momentum supported by a circular fiber. We consider a multimode step-index fiber with a high-index coating, where the waves in the slab are evanescently coupled to the modes of the fiber. Conditions for effective resonant interaction are identified. Based on a hybrid analytical–numerical coupled mode model, our simulations predict that substantial fractions of the input power can be focused into waves with specific orbital angular momentum, of excellent purity, with a clear distinction between degenerate modes with opposite vorticity. AU - Hammer, Manfred AU - Ebers, Lena AU - Förstner, Jens ID - 21932 IS - 5 JF - Journal of the Optical Society of America B KW - tet_topic_waveguides SN - 0740-3224 TI - Resonant evanescent excitation of guided waves with high-order optical angular momentum VL - 38 ER - TY - JOUR AB - In this article, we present an efficient descent method for locally Lipschitz continuous multiobjective optimization problems (MOPs). The method is realized by combining a theoretical result regarding the computation of descent directions for nonsmooth MOPs with a practical method to approximate the subdifferentials of the objective functions. We show convergence to points which satisfy a necessary condition for Pareto optimality. Using a set of test problems, we compare our method to the multiobjective proximal bundle method by M\"akel\"a. The results indicate that our method is competitive while being easier to implement. While the number of objective function evaluations is larger, the overall number of subgradient evaluations is lower. Finally, we show that our method can be combined with a subdivision algorithm to compute entire Pareto sets of nonsmooth MOPs. AU - Gebken, Bennet AU - Peitz, Sebastian ID - 16867 JF - Journal of Optimization Theory and Applications TI - An efficient descent method for locally Lipschitz multiobjective optimization problems VL - 188 ER - TY - JOUR AB - It is a challenging task to identify the objectives on which a certain decision was based, in particular if several, potentially conflicting criteria are equally important and a continuous set of optimal compromise decisions exists. This task can be understood as the inverse problem of multiobjective optimization, where the goal is to find the objective function vector of a given Pareto set. To this end, we present a method to construct the objective function vector of an unconstrained multiobjective optimization problem (MOP) such that the Pareto critical set contains a given set of data points with prescribed KKT multipliers. If such an MOP can not be found, then the method instead produces an MOP whose Pareto critical set is at least close to the data points. The key idea is to consider the objective function vector in the multiobjective KKT conditions as variable and then search for the objectives that minimize the Euclidean norm of the resulting system of equations. By expressing the objectives in a finite-dimensional basis, we transform this problem into a homogeneous, linear system of equations that can be solved efficiently. Potential applications of this approach include the identification of objectives (both from clean and noisy data) and the construction of surrogate models for expensive MOPs. AU - Gebken, Bennet AU - Peitz, Sebastian ID - 16295 JF - Journal of Global Optimization TI - Inverse multiobjective optimization: Inferring decision criteria from data VL - 80 ER - TY - JOUR AB - Topological photonic crystals (TPhCs) provide robust manipulation of light with built-in immunity to fabrication tolerances and disorder. Recently, it was shown that TPhCs based on weak topology with a dislocation inherit this robustness and further host topologically protected lower-dimensional localized modes. However, TPhCs with weak topology at optical frequencies have not been demonstrated so far. Here, we use scattering-type scanning near-field optical microscopy to verify mid-bandgap zero-dimensional light localization close to 100 THz in a TPhC with nontrivial Zak phase and an edge dislocation. We show that because of the weak topology, differently extended dislocation centers induce similarly strong light localization. The experimental results are supported by full-field simulations. Along with the underlying fundamental physics, our results lay a foundation for the application of TPhCs based on weak topology in active topological nanophotonics, and nonlinear and quantum optic integrated devices because of their strong and robust light localization. AU - Lu, Jinlong AU - Wirth, Konstantin G. AU - Gao, Wenlong AU - Heßler, Andreas AU - Sain, Basudeb AU - Taubner, Thomas AU - Zentgraf, Thomas ID - 28255 IS - 49 JF - Science Advances SN - 2375-2548 TI - Observing 0D subwavelength-localized modes at ~100 THz protected by weak topology VL - 7 ER - TY - CONF AB - Static analysis is used to automatically detect bugs and security breaches, and aids compileroptimization. Whole-program analysis (WPA) can yield high precision, however causes long analysistimes and thus does not match common software-development workflows, making it often impracticalto use for large, real-world applications.This paper thus presents the design and implementation ofModAlyzer, a novel static-analysisapproach that aims at accelerating whole-program analysis by making the analysis modular andcompositional. It shows how to computelossless, persisted summaries for callgraph, points-to anddata-flow information, and it reports under which circumstances this function-level compositionalanalysis outperforms WPA.We implementedModAlyzeras an extension to LLVM and PhASAR, and applied it to 12 real-world C and C++ applications. At analysis time,ModAlyzermodularly and losslessly summarizesthe analysis effect of the library code those applications share, hence avoiding its repeated re-analysis.The experimental results show that the reuse of these summaries can save, on average, 72% ofanalysis time over WPA. Moreover, because it is lossless, the module-wise analysis fully retainsprecision and recall. Surprisingly, as our results show, it sometimes even yields precision superior toWPA. The initial summary generation, on average, takes about 3.67 times as long as WPA. AU - Schubert, Philipp AU - Hermann, Ben AU - Bodden, Eric ID - 21598 T2 - European Conference on Object-Oriented Programming (ECOOP) TI - Lossless, Persisted Summarization of Static Callgraph, Points-To and Data-Flow Analysis ER - TY - CONF AU - Bielak, Christian Roman AU - Böhnke, Max AU - Bobbert, Mathias AU - Meschut, Gerson ID - 20807 TI - Further development of a numerical method for analyzing the load capacity of clinched joints in versatile process chains ER - TY - THES AU - Wever, Marcel Dominik ID - 27284 TI - Automated Machine Learning for Multi-Label Classification ER - TY - JOUR AB - This study deals with the damage behavior of metallic materials by the application of different manufacturing processes and using different optical measurement methods to identify the crack initiation in the damage specimen. The study is intended to highlight the importance of considering manufacturing processes and optical measurement methods in a numerical simulation when analyzing the damage behavior of metallic materials. To describe the damage behavior of the material in the process chain simulations, it is important to calibrate the parameters of damage model more accurately. These parameters are determined using experimental investigation of desired damage specimens. In this regard, a selected damage specimen manufactured by different cutting processes is first experimentally and then numerically investigated. It is shown that the manufacturing process and the optical measurement methods influence the stress state analyzed in the numerical simulation. AU - Otroshi, Mortaza AU - Meschut, Gerson AU - Nesakumar, Aathavan ID - 25476 IS - 3 JF - Journal of Manufacturing Engineering KW - Damage behaviour KW - Stress triaxiality KW - Manufacturing process and Optical measurement TI - The influence of manufacturing processes and optical measurement methods on the damage behavior of HX340LAD micro-alloyed steels VL - 16 ER - TY - CONF AB - Requirements for energy distribution networks are changing fast due to the growing share of renewable energy, increasing electrification, and novel consumer and asset technologies. Since uncertainties about future developments increase planning difficulty, flexibility potentials such as synergies between the electricity, gas, heat, and transport sector often remain unused. In this paper, we therefore present a novel module-based concept for a decision support system that helps distribution network planners to identify cross-sectoral synergies and to select optimal network assets such as transformers, cables, pipes, energy storage systems or energy conversion technology. The concept enables long-term transformation plans and supports distribution network planners in designing reliable, sustainable and cost-efficient distribution networks for future demands. AU - Kirchhoff, Jonas AU - Burmeister, Sascha Christian AU - Weskamp, Christoph AU - Engels, Gregor ED - Breitner, Michael H. ED - Lehnhoff, Sebastian ED - Nieße, Astrid ED - Staudt, Philipp ED - Weinhardt, Christof ED - Werth, Oliver ID - 21093 T2 - Energy Informatics and Electro Mobility ICT TI - Towards a Decision Support System for Cross-Sectoral Energy Distribution Network Planning ER - TY - JOUR AB - Ideational impact refers to the uptake of a paper's ideas and concepts by subsequent research. It is defined in stark contrast to total citation impact, a measure predominantly used in research evaluation that assumes that all citations are equal. Understanding ideational impact is critical for evaluating research impact and understanding how scientific disciplines build a cumulative tradition. Research has only recently developed automated citation classification techniques to distinguish between different types of citations and generally does not emphasize the conceptual content of the citations and its ideational impact. To address this problem, we develop Deep Content-enriched Ideational Impact Classification (Deep-CENIC) as the first automated approach for ideational impact classification to support researchers' literature search practices. We evaluate Deep-CENIC on 1,256 papers citing 24 information systems review articles from the IT business value domain. We show that Deep-CENIC significantly outperforms state-of-the-art benchmark models. We contribute to information systems research by operationalizing the concept of ideational impact, designing a recommender system for academic papers based on deep learning techniques, and empirically exploring the ideational impact of the IT business value domain. AU - Prester, Julian AU - Wagner, Gerit AU - Schryen, Guido AU - Hassan, Nik Rushdi ID - 20212 IS - January JF - Decision Support Systems KW - Ideational impact KW - citation classification KW - academic recommender systems KW - natural language processing KW - deep learning KW - cumulative tradition TI - Classifying the Ideational Impact of Information Systems Review Articles: A Content-Enriched Deep Learning Approach VL - 140 ER - TY - JOUR AB - Review papers are essential for knowledge development in IS. While some are cited twice a day, others accumulate single digit citations over a decade. The magnitude of these differences prompts us to analyze what distinguishes those reviews that have proven to be integral to scientific progress from those that might be considered less impactful. Our results highlight differences between reviews aimed at describing, understanding, explaining, and theory testing. Beyond the control variables, they demonstrate the importance of methodological transparency and the development of research agendas. These insights inform all stakeholders involved in the development and publication of review papers. AU - Wagner, Gerit AU - Prester, Julian AU - Roche, Maria AU - Schryen, Guido AU - Benlian, Alexander AU - Paré, Guy AU - Templier, Mathieu ID - 20844 IS - 3 JF - Information & Management KW - Literature review KW - review papers KW - scientometric KW - scientific impact KW - citation analysis TI - Which Factors Affect the Scientific Impact of Review Papers in IS Research? A Scientometric Study VL - 58 ER - TY - JOUR AU - Stumpe, Miriam AU - Rößler, David AU - Schryen, Guido AU - Kliewer, Natalia ID - 23494 JF - EURO Journal on Transportation and Logistics TI - Study on Sensitivity of Electric Bus Systems under Simultaneous Optimization of Charging Infrastructure and Vehicle Schedules VL - 10 ER - TY - JOUR AU - Wagner, Gerit AU - Prester, Julian AU - Schryen, Guido ID - 17934 IS - 1 JF - Communications of the Association for Information Systems TI - Exploring the Scientific Impact of Information Systems Design Science Research VL - 48 ER - TY - THES AB - Ein zentraler Aspekt bei der Untersuchung dynamischer Systeme ist die Analyse ihrer invarianten Mengen wie des globalen Attraktors und (in)stabiler Mannigfaltigkeiten. Insbesondere wenn das zugrunde liegende System von einem Parameter abhängt, ist es entscheidend, sie im Bezug auf diesen Parameter effizient zu verfolgen. Für die Berechnung invarianter Mengen stützen wir uns für ihre Approximation auf numerische Algorithmen. Typischerweise können diese Methoden jedoch nur auf endlich-dimensionale dynamische Systeme angewendet werden. In dieser Arbeit präsentieren wir daher einen numerischen Rahmen für die globale dynamische Analyse unendlich-dimensionaler Systeme. Wir werden Einbettungstechniken verwenden, um das core dynamical system (CDS) zu definieren, welches ein dynamisch äquivalentes endlich-dimensionales System ist.Das CDS wird dann verwendet, um eingebettete invariante Mengen, also eins-zu-eins Bilder, mittels Mengen-orientierten numerischen Methoden zu approximieren. Bei der Konstruktion des CDS ist es entscheidend, eine geeignete Beobachtungsabbildung auszuwählen und die geeignete inverse Abbildung zu entwerfen. Dazu werden wir geeignete numerische Implementierungen des CDS für DDEs und PDEs vorstellen. Für eine nachfolgende geometrische Analyse der eingebetteten invarianten Menge betrachten wir eine Lerntechnik namens diffusion maps, die ihre intrinsische Geometrie enthüllt sowie ihre Dimension schätzt. Schließlich wenden wir unsere entwickelten numerischen Methoden an einigen bekannten unendlich-dimensionale dynamischen Systeme an, wie die Mackey-Glass-Gleichung, die Kuramoto-Sivashinsky-Gleichung und die Navier-Stokes-Gleichung. AU - Gerlach, Raphael ID - 32057 TI - The Computation and Analysis of Invariant Sets of Infinite-Dimensional Systems ER - TY - CHAP AU - Karsten, Andrea ED - Lahm, Swantje ED - Meyhöfer, Frank ED - Neumann, Friederike ID - 32150 T2 - Schreiblehrkonzepte an Hochschulen. Fallstudien und Reflexionen zum fachspezifischen Schreibenlehren und -lernen TI - Einblicke in explizite und implizite Erwartungen Lehrender an Studierendentexte. Textbasierte Interviews zu Zielen und Erträgen von fachsensiblem Peer-Textfeedback VL - 4 ER - TY - CONF AB - In developing complex technical systems, requirements are subject to continuous change. Systematic and holistic change impact analysis and proactive measures are required for reducing the number of requirement changes and their negative impact. There is no method to analyse the holistic impact of a requirement change in the context of developing complex technical systems. Holistic analysis requires to consider the local effects of requirement changes as well as effects from change propagation. To develop an approach for holistic change propagation and impact analysis, twelve performance goals are defined. Those are derived from a state of research analysis as well as an industry workshop. A three-step method is proposed. Firstly, requirement dependencies that cause change propagation are detected. Secondly, critical requirements are automatically identified based on a Page Rank algorithm. Thirdly, change impact of critical requirements is analysed based on a guideline. Validation proves that ten goals are fulfilled and two are partly fulfilled. The method addresses major shortcomings of preceding research and enables sound decision making for development engineers both before a change occurs and during decision process on a change request. This helps to reduce negative change impact in development projects and the risk of project failure. AU - Gräßler, Iris AU - Oleff, Christian AU - Preuß, Daniel ED - Wagner, Beverly ED - Wilson, Juliette ID - 24017 TI - Holistic change propagation and impact analysis in requirements management ER - TY - GEN AU - Bobolz, Jan AU - Eidens, Fabian AU - Heitjohann, Raphael AU - Fell, Jeremy ID - 26645 TI - Cryptimeleon: A Library for Fast Prototyping of Privacy-Preserving Cryptographic Schemes ER -