@article{48599,
abstract = {{AbstractThe biexciton‐exciton emission cascade commonly used in quantum‐dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work, it focuses on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishability. It achieves this goal by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum‐dot cavity excitation dynamics with full access to photon properties. It reports non‐trivial dependencies on system parameters and use the predictive power of the combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values, here specifically for the telecom C‐band at 1550 nm.}},
author = {{Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}},
issn = {{2511-9044}},
journal = {{Advanced Quantum Technologies}},
keywords = {{tet_topic_qd}},
publisher = {{Wiley}},
title = {{{On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}}},
doi = {{10.1002/qute.202300142}},
year = {{2023}},
}
@unpublished{43246,
abstract = {{The biexciton-exciton emission cascade commonly used in quantum-dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work we focus on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishibility. We achieve this goal by selectively reducing the biexciton lifetime with an optical resonator. We demonstrate that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and two-fold degenerate optical modes. Our in-depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum-dot cavity excitation dynamics with full access to photon properties. We report non-trivial dependencies on system parameters and use the predictive power of our combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values in the telecom C-band at $1550\,\mathrm{nm}$.}},
author = {{Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}},
keywords = {{tet_topic_phc, tet_topic_qd}},
title = {{{On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs}}},
year = {{2023}},
}
@article{48075,
abstract = {{AbstractThe constantly increasing challenges of production technology for the economic and resource-saving production of metallic workpieces require, among other things, the optimisation of existing processes. Forming technology, which is confronted with new challenges regarding the quality of the workpieces, must also organise the individual processes more efficiently and at the same time more reliably in order to be able to guarantee good workpiece quality and at the same time to be able to produce economically. One way to meet these challenges is to carry out the forming processes in closed-loop control systems using softsensors. Despite the many potential applications of softsensors in the field of forming technology, there is still no definition of the term softsensor. This publication therefore proposes a definition of the softsensor based on the definition of a sensor and the distinction from the observer, which on the one hand is intended to stimulate scientific discourse and on the other hand is also intended to form the basis for further scientific work. Based on this definition, a wide variety of highly topical application examples of various softsensors in the field of forming technology are given.}},
author = {{Homberg, Werner and Arian, Bahman and Arne, Viktor and Borgert, Thomas and Brosius, Alexander and Groche, Peter and Hartmann, Christoph and Kersting, Lukas and Laue, Robert and Martschin, Juri and Meurer, Thomas and Spies, Daniel and Tekkaya, A. Erman and Trächtler, Ansgar and Volk, Wolfram and Wendler, Frank and Wrobel, Malte}},
issn = {{0944-6524}},
journal = {{Production Engineering}},
keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Softsensors: key component of property control in forming technology}}},
doi = {{10.1007/s11740-023-01227-1}},
year = {{2023}},
}
@inbook{50061,
author = {{Schlegel-Matthies, Kirsten}},
booktitle = {{Nachdenken über Lehrerinnen- und Lehrerbildung. Anregungen zur Weiterentwicklung der Pädagogischen Hochschulen in der deutschsprachigen Schweiz. Aus Anlass des 20-Jahre-Jubiläums der Pädagogischen Hochschule Luzern}},
editor = {{Tremp, Peter}},
pages = {{31 -- 34}},
publisher = {{Pädagogische Hochschule Luzern}},
title = {{{Zwischen Überwältigung und Beliebigkeit - Wertorientierung im Unterricht als Aufgabe der Lehrpersonenbildung}}},
year = {{2023}},
}
@inproceedings{34135,
abstract = {{By one of the most fundamental principles in physics, a dynamical system will exhibit those motions which extremise an action functional. This leads to the formation of the Euler-Lagrange equations, which serve as a model of how the system will behave in time. If the dynamics exhibit additional symmetries, then the motion fulfils additional conservation laws, such as conservation of energy (time invariance), momentum (translation invariance), or angular momentum (rotational invariance). To learn a system representation, one could learn the discrete Euler-Lagrange equations, or alternatively, learn the discrete Lagrangian function Ld which defines them. Based on ideas from Lie group theory, in this work we introduce a framework to learn a discrete Lagrangian along with its symmetry group from discrete observations of motions and, therefore, identify conserved quantities. The learning process does not restrict the form of the Lagrangian, does not require velocity or momentum observations or predictions and incorporates a cost term which safeguards against unwanted solutions and against potential numerical issues in forward simulations. The learnt discrete quantities are related to their continuous analogues using variational backward error analysis and numerical results demonstrate the improvement such models can have both qualitatively and quantitatively even in the presence of noise.}},
author = {{Lishkova, Yana and Scherer, Paul and Ridderbusch, Steffen and Jamnik, Mateja and Liò, Pietro and Ober-Blöbaum, Sina and Offen, Christian}},
booktitle = {{IFAC-PapersOnLine}},
location = {{ Yokohama, Japan}},
number = {{2}},
pages = {{3203--3210}},
publisher = {{Elsevier}},
title = {{{Discrete Lagrangian Neural Networks with Automatic Symmetry Discovery}}},
doi = {{10.1016/j.ifacol.2023.10.1457}},
volume = {{56}},
year = {{2023}},
}
@book{50139,
editor = {{Dahmen, Stephan and Demir, Zeynep and Ertugul, Baris and Kloss, Daniela and Ritter, Bettina}},
isbn = {{978-3-7799-7170-2}},
pages = {{267}},
publisher = {{Beltz Juventa}},
title = {{{Politisierung von Jugend}}},
year = {{2023}},
}
@book{33407,
abstract = {{Der vorliegende Band versammelt intersektionale literaturwissenschaftliche und -didaktische Fallstudien aus unterschiedlichen Philologien und bietet so ein Prisma der Erforschung literarischer Repräsentationen des Zusammenspiels von einander verschärfenden bzw. abschwächenden Diskriminierungskategorien. Die Einzelbeiträge präsentieren kritische Reflexionen und Modifizierungen verschiedener Positionen der intersektionalen Forschung sowie Beispiele für die vielfältige Ausgestaltung intersektional orientierter Textanalyse auf theoretischer und methodischer Ebene. Da wissenschaftliche und literarische ebenso wie zeitgenössische und historische Texte in verschiedenen Sprachen (Englisch, Deutsch, Italienisch, Niederländisch, Spanisch etc.) aufgegriffen werden, zeigt der Band auf, dass Machtstrukturen in unterschiedlichen kulturellen Kontexten Analogien aufweisen, deren Analyse von Differenzierungen verschiedener Herrschaftsstrukturen profitiert.}},
editor = {{Abgrego, Verónica and Henke, Ina and Kißling, Magdalena and Lammer, Christina and Leuker, Maria-Th.}},
keywords = {{Intersektionalität, Literaturwissenschaft, Literaturunterricht, Klassenlektüre, Auswahl, Textanalyse, Literatur, Erzähltheorie, Machtstruktur, Diskriminierung, Geschlechterrolle, Geschlechterverhältnis, Geschlechtsidentität, Rassismus, Soziale Klasse, Othering, Feminismus}},
pages = {{492}},
publisher = {{WBG}},
title = {{{Intersektionalität und erzählte Welten. Fachwissenschaftliche und fachdidaktische Perspektiven auf Literatur und Medien}}},
doi = {{https://doi.org/10.21248/gups.73899}},
year = {{2023}},
}
@inbook{50357,
abstract = {{Designbasierte Forschung umfasst verschiedene Ausprägungsformen von Forschungsprozessen, die auf die Entwicklung und Implementation von Innovationen abzielen. Mit der Anwendung von designbasierten Ansätzen haben Forscherinnen und Forscher den Anspruch, sich an der Lösung praktischer Problemlagen zu beteiligen; dies ist ein wichtiger Ausgangspunkt für die Anlage von Forschungsprozessen und -programmen. Häufig geht es um bisher wenig strukturierte, aktuelle Probleme in der Berufsbildungspraxis, was wiederum bedeutsam für das Aufeinandertreffen und die Zusammenarbeit von Wissenschaft und Praxis ist. Der vorliegende Band nimmt die Vielfalt designbasierter Forschung auf und dokumentiert, ergänzt durch Visualisierungen, die Beiträge des AG BFN Forums „Wissenschaft trifft Praxis – Designbasierte Forschung in der beruflichen Bildung“, welches in einem digitalen Format an der Universität Paderborn stattfand. }},
author = {{Ertl, Hubert and Kremer, H.-Hugo and Kundisch, Heike and Sloane, Peter F. E.}},
booktitle = {{Wissenschaft trifft Praxis - Designbasierte Forschung in der beruflichen Bildung.}},
editor = {{Kremer, H.-Hugo and Ertl, Hubert and Sloane, Peter F. E.}},
publisher = {{Verlag Barbara Budrich}},
title = {{{Designbasierte Forschung in der beruflichen Bildung:Perspektiven aus Wissenschaft, Praxis und Politik. }}},
volume = {{Band 30}},
year = {{2023}},
}
@article{50356,
author = {{Kundisch, Heike}},
journal = {{Magazin des Forum Bildung Digitalisierung}},
title = {{{Wie wir die mittlere Führungsebene als Transformationsbegleiter:innen an Schulen stärken können}}},
year = {{2023}},
}
@article{50407,
abstract = {{In the last decade, conductive domain walls (CDWs) in single crystals of the uniaxial model ferroelectric lithium niobate (LiNbO3; LNO) have been shown to reach resistances more than 10 orders of magnitude lower than the resistance of the surrounding bulk, with charge carriers being firmly confined to sheets with a width of a few nanometers. LNO is thus currently witnessing increased attention because of its potential in the design of room-temperature nanoelectronic circuits and devices based on such CDWs. In this context, the reliable determination of the fundamental transport parameters of LNO CDWs, in particular the 2D charge carrier density n2D and the Hall mobility μH of the majority carriers, is of great interest. In this contribution, we present and apply a robust and easy-to-prepare Hall-effect measurement setup by adapting the standard four-probe van der Pauw method to contact a single, hexagonally shaped domain wall that fully penetrates the 200-μm-thick LNO bulk single crystal. We then determine n2D and μH for a set of external magnetic fields B and prove the expected cosinelike angular dependence of the Hall voltage. Lastly, we present photoinduced-Hall-effect measurements of one and the same DW, by determining the impact of super-band-gap illumination on n2D.}},
author = {{Beccard, Henrik and Beyreuther, Elke and Kirbus, Benjamin and Seddon, Samuel D. and Rüsing, Michael and Eng, Lukas M.}},
issn = {{2331-7019}},
journal = {{Physical Review Applied}},
keywords = {{General Physics and Astronomy}},
number = {{6}},
publisher = {{American Physical Society (APS)}},
title = {{{Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall}}},
doi = {{10.1103/physrevapplied.20.064043}},
volume = {{20}},
year = {{2023}},
}
@inproceedings{37312,
abstract = {{Optimal decision making requires appropriate evaluation of advice. Recent literature reports that algorithm aversion reduces the effectiveness of predictive algorithms. However, it remains unclear how people recover from bad advice given by an otherwise good advisor. Previous work has focused on algorithm aversion at a single time point. We extend this work by examining successive decisions in a time series forecasting task using an online between-subjects experiment (N = 87). Our empirical results do not confirm algorithm aversion immediately after bad advice. The estimated effect suggests an increasing algorithm appreciation over time. Our work extends the current knowledge on algorithm aversion with insights into how weight on advice is adjusted over consecutive tasks. Since most forecasting tasks are not one-off decisions, this also has implications for practitioners.}},
author = {{Leffrang, Dirk and Bösch, Kevin and Müller, Oliver}},
booktitle = {{Hawaii International Conference on System Sciences}},
keywords = {{Algorithm aversion, Time series, Decision making, Advice taking, Forecasting}},
title = {{{Do People Recover from Algorithm Aversion? An Experimental Study of Algorithm Aversion over Time}}},
year = {{2023}},
}
@inproceedings{50431,
abstract = {{Recommender systems now span the entire customer journey. Amid the multitude of diversified experi- ences, immersing in cultural events has become a key aspect of tourism. Cultural events, however, suffer from fleeting lifecycles, evade exact replication, and invariably lie in the future. In addition, their low standardization makes harnessing historical data regarding event content or past patron evaluations intricate. The distinctive traits of events thereby compound the challenge of the cold-start dilemma in event recommenders. Content-based recommendations stand as a viable avenue to alleviate this issue, functioning even in scenarios where item-user information is scarce. Still, the effectiveness of content- based recommendations often hinges on the quality of the data representation they build upon. In this study, we explore an array of cutting-edge uni- and multimodal vision and language foundation models (VL-FMs) for this purpose. Next, we derive content-based recommendations through a straightforward clustering approach that groups akin events together, and evaluate the efficacy of the models through a series of online user experiments across three dimensions: similarity-based evaluation, comparison-based evaluation, and clustering assignment evaluation. Our experiments generated four major findings. First, we found that all VL-FMs consistently outperformed a naive baseline of recommending randomly drawn events. Second, unimodal text-based embeddings were surprisingly on par or in some cases even superior to multimodal embeddings. Third, multimodal embeddings yielded arguably more fine-grained and diverse clusters in comparison to their unimodal counterparts. Finally, we could confirm that cross event interest is indeed reliant on the perceived similarity of events, resonating with the notion of similarity in content-based recommendations. All in all, we believe that leveraging the potential of contemporary FMs for content-based event recommendations would help address the cold-start problem and propel this field of research forward in new and exciting ways.}},
author = {{Halimeh, Haya and Freese, Florian and Müller, Oliver}},
booktitle = {{Workshop on Recommenders in Tourism, co-located with the 17th ACM Conference on Recommender Systems}},
title = {{{Event Recommendations through the Lens of Vision and Language Foundation Models}}},
year = {{2023}},
}
@inproceedings{45270,
abstract = {{Clinical depression is a serious mental disorder that poses challenges for both personal and public health. Millions of people struggle with depression each year, but for many, the disorder goes undiagnosed or untreated. Over the last decade, early depression detection on social media emerged as an interdisciplinary research field. However, there is still a gap in detecting hesitant, depression-susceptible individuals with minimal direct depressive signals at an early stage. We, therefore, take up this open point and leverage posts from Reddit to fill the addressed gap. Our results demonstrate the potential of contemporary Transformer architectures in yielding promising predictive capabilities for mental health research. Furthermore, we investigate the model’s interpretability using a surrogate and a topic modeling approach. Based on our findings, we consider this work as a further step towards developing a better understanding of mental eHealth and hope that our results can support the development of future technologies.}},
author = {{Halimeh, Haya and Caron, Matthew and Müller, Oliver}},
booktitle = {{Hawaii International Conference on System Sciences}},
keywords = {{Social Media and Healthcare Technology, early depression detection, liwc, mental health, transfer learning, transformer architectures}},
title = {{{Early Depression Detection with Transformer Models: Analyzing the Relationship between Linguistic and Psychology-Based Features}}},
year = {{2023}},
}
@techreport{50741,
abstract = {{Zitieren als:
Wissenschaftlicher Beirat für Agrarpolitik, Ernährung und gesundheitlichen Verbraucher-
schutz beim BMEL (2023): Neue Sorgfaltspflichten für Unternehmen des Agrar- und
Ernährungssektors: Empfehlungen zu aktuellen Gesetzesentwicklungen. Gutachten. Berlin.}},
author = {{Spiller, Achim and Nieberg, Hiltrud and Renner, Britta and Balmann, Alfons and Birna, Regina and Bosy-Westphal, Anja and Buyken, Anette and Döring, Thomas and Feindt, Peter and Götz, Kai-Uwe and Linseisen, Jakob and Nöthlings, Ute and Martínes, José and Pischetsrieder, Monika and Voget-Kleschin, Lieske and Weingarten, Peter and Wesseler, Justus and Wieck, Christine}},
publisher = {{Wissenschaftlicher Beirat für Agrarpolitik, Ernährung und gesundheitlichen Verbraucherschutz beim BMEL}},
title = {{{Neue Sorgfaltspflichten für Unternehmen des Agrar- und Ernährungssektors: Empfehlungen zu aktuellen Gesetzesentwicklungen}}},
year = {{2023}},
}
@misc{46533,
author = {{Buhl, Heike M. and Eickelmann, Birgit and Niemann, Jan and Raneck-Kuhlmann, Anna and Drossel, Kerstin}},
title = {{{Qualitätsmanagement im Verbundvorhaben Communities of Practice für eine innovative Lehrerbildung NRW (COMeIN). Abschlussbericht}}},
year = {{2023}},
}
@article{51020,
abstract = {{Der Hoffnung auf einen nachhaltigen Digitalisierungsschub von Studium und Lehre an Hochschulen in Corona-Zeiten folgte vielerorts Ernüchterung. Die fast vollständige und überwiegend begrüßte Rückkehr zur Präsenzlehre führte dazu, dass wenig darüber reflektiert wurde, welche Erfahrungen mit der Online-Lehre gemacht wurden und worauf sich aufbauen lässt. Im Frühjahr 2023 wurde ein Open-Space-Workshop zur Unterstützung der (digitalen) Lehre durchgeführt. Die Ergebnisse zeigen: Den Lehrenden kommt eine zentrale Rolle für die weitere Digitalisierung zu.}},
author = {{Mauermeister, Sylvi and Steinhardt, Isabel and Bloch, Roland and Lohner, David and Schulz, Anja}},
issn = {{0340-8469}},
journal = {{Sozialmagazin}},
pages = {{66 -- 72}},
publisher = {{Beltz Juventa}},
title = {{{"Immerhin wurden Erfahrungen mit digitalen Tools gemacht"}}},
doi = {{10.3262/SM2312066}},
volume = {{11}},
year = {{2023}},
}
@article{46042,
author = {{Koch, Reinald and Holtmann, Svea and Giese, Henning}},
issn = {{0044-2372}},
journal = {{Journal of Business Economics}},
number = {{1-2}},
pages = {{59--109}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Losses Never Sleep – The Effect of Tax Loss Offset on Stock Market Returns during Economic Crises}}},
doi = {{10.1007/s11573-022-01134-4}},
volume = {{93}},
year = {{2023}},
}
@article{22924,
author = {{Hoppe, Thomas and Schanz, Deborah and Sturm, Susann and Sureth-Sloane, Caren}},
issn = {{1468-4497}},
journal = {{European Accounting Review}},
number = {{2}},
pages = {{239--273}},
title = {{{The Tax Complexity Index – A Survey-Based Country Measure of Tax Code and Framework Complexity}}},
doi = {{10.1080/09638180.2021.1951316}},
volume = {{32}},
year = {{2023}},
}
@techreport{51017,
author = {{Schulte, A. and Eickelmann, Birgit and Hauck-Thum, U.}},
title = {{{Schultransform trifft MINT. Der Einfluss eines MINT-Schwerpunkts auf die Schultransformation}}},
year = {{2023}},
}
@article{50854,
author = {{Blank, Andreas}},
journal = {{Early Modern French Studies }},
number = {{1}},
pages = {{131--149}},
title = {{{“The Morality of Self-Acceptance: La Rochefoucauld and the Augustinian Challenge.” }}},
volume = {{45}},
year = {{2023}},
}