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 -