@article{63144, author = {{Briggs, Benjamin and Cameron, James C. and Letz, Janina Carmen and Pollitz, Josh}}, journal = {{Forum Math. Sigma}}, pages = {{e63}}, title = {{{Koszul homomorphisms and universal resolutions in local algebra}}}, doi = {{10.1017/fms.2025.21}}, volume = {{13}}, year = {{2025}}, } @unpublished{63150, author = {{Cummings, Charley and Gratz, Sira and Kirkman, Ellen and Letz, Janina Carmen and Rock, J. Daisie and Špenko, Špela}}, pages = {{1--9}}, title = {{{An equivalence linking CM-types $A_\infty$ and $D_\infty$}}}, year = {{2025}}, } @unpublished{63149, author = {{Kekkou, Antonia and Letz, Janina Carmen and Stephan, Marc}}, pages = {{1--37}}, title = {{{Regular sequences for triangulated categories}}}, year = {{2025}}, } @article{63145, author = {{Letz, Janina Carmen and Sauter, Julia}}, issn = {{0025-5858}}, journal = {{Abh. Math. Semin. Univ. Hambg. }}, pages = {{83--92}}, title = {{{Realization functors in algebraic triangulated categories}}}, doi = {{10.1007/s12188-025-00289-5}}, volume = {{95}}, year = {{2025}}, } @article{63146, author = {{Bennett-Tennenhaus, Raphael and Goodbody, Isambard and Letz, Janina Carmen and Shah, Amit}}, issn = {{0021-8693}}, journal = {{J. Algebra}}, pages = {{361--405}}, title = {{{Tensor extriangulated categories}}}, doi = {{10.1016/j.jalgebra.2025.07.041}}, volume = {{685}}, year = {{2025}}, } @article{63147, author = {{Letz, Janina Carmen}}, issn = {{0092-7872}}, journal = {{Comm. Algebra}}, pages = {{1--20}}, title = {{{Transfer of A-infinity structures to projective resolutions}}}, doi = {{10.1080/00927872.2025.2575100}}, year = {{2025}}, } @unpublished{63148, author = {{Letz, Janina Carmen}}, pages = {{1--7}}, title = {{{The Rouquier dimension of the category of perfect complexes over a regular ring}}}, year = {{2025}}, } @inbook{60988, abstract = {{ Was macht gelungene Hochschullehre aus? Und an welchen Stellschrauben kann ich drehen, um die eigene Lehre zu verbessern? Das zweibändige "Praxishandbuch Hochschullehre" bietet als Standardwerk Orientierung bei didaktischen Fragen und beleuchtet aktuelle Entwicklungen des Bereichs. In Band II setzen sich die Beiträger:innen mit dem Prüfen und Bewerten von Studierenden auseinander, geben Tipps zu Feedback und Evaluation und widmen sich den Themen Digitalisierung, Nachhaltigkeit sowie Barrierefreiheit. Angereichert mit Abbildungen, Definitionen, Schlagworten, Schritt-für-Schritt-Anleitungen und einem umfangreichen Glossar lädt der anwendungsorientierte Leitfaden alle Lehrenden dazu ein, sich aktiv mit den wesentlichen Inhalten der Hochschullehre auseinanderzusetzen – unabhängig von Fachrichtung und Erfahrungsstufe. utb+: Zusätzlich zum Buch stehen zu einigen Beiträgen hilfreiche Materialien wie Verlaufsprotokolle, Vorbereitungs- und Bewertungsbögen zum Download bereit. Verfügbar in drei Ausgabearten: Print, E-Book (PDF), Web-Book (Buch als Website). Das Web-Book integriert Buchinhalte und digitale Elemente. Für Print und E-Book sind die digitalen Materialien über utb.de kostenlos abrufbar.}}, author = {{Weber, Tassja}}, booktitle = {{Praxishandbuch Hochschullehre II}}, editor = {{Vöing, Nerea}}, isbn = {{9783838563305}}, publisher = {{utb GmbH}}, title = {{{Open Educational Resources (OER)}}}, doi = {{10.36198/9783838563305}}, year = {{2025}}, } @article{59507, abstract = {{Differential equations posed on quadratic matrix Lie groups arise in the context of classical mechanics and quantum dynamical systems. Lie group numerical integrators preserve the constants of motions defining the Lie group. Thus, they respect important physical laws of the dynamical system, such as unitarity and energy conservation in the context of quantum dynamical systems, for instance. In this article we develop a high-order commutator free Lie group integrator for non-autonomous differential equations evolving on quadratic Lie groups. Instead of matrix exponentials, which are expensive to evaluate and need to be approximated by appropriate rational functions in order to preserve the Lie group structure, the proposed method is obtained as a composition of Cayley transforms which naturally respect the structure of quadratic Lie groups while being computationally efficient to evaluate. Unlike Cayley-Magnus methods the method is also free from nested matrix commutators.}}, author = {{Wembe Moafo, Boris Edgar and Offen, Cristian and Maslovskaya, Sofya and Ober-Blöbaum, Sina and Singh, Pranav}}, journal = {{J. Comput. Appl. Math}}, number = {{15}}, title = {{{Commutator-free Cayley methods}}}, doi = {{10.1016/j.cam.2025.117184}}, volume = {{477}}, year = {{2025}}, } @inproceedings{63157, abstract = {{Three-phase cascaded H-bridge converters (CHBs) in star configuration require reliable current controllers to evenly charge the module DC-link capacitors. Conventionally, a current control in dq-coordinates is utilized. At steady state, the resulting calculated reference arm voltages are sinusoidal, have identical amplitudes and show a phase shift of 120 degree to each other. For balanced grid inductors, the resulting grid currents also have the same amplitude. However, own simulations show that unbalanced grid inductors always lead to different grid current amplitudes (4% difference in this case). As a result, the averaged charging module powers differ and the peak DC-link capacitor voltage rises as well. In the first step, an adaptation of an existing zero-sequence voltage injection is proposed. For balanced grid inductors, it converges to the 3rd harmonic voltage injection which can reduce the peak-to-peak DC-link voltage ripple up by to 50% and balances the power between the phases. However, unbalanced grid inductors still lead to the same unbalanced grid currents of 4%. Therefore, a new method with 4 integrators based on linear regression is proposed to achieve sinusoidal grid currents for unbalanced inductors. The proposed method has a similar transient dynamic as the conventional dq control, but balances the grid currents nearly ideally. Simulation results of a 1MW cascaded H bridge and a scaled-down prototype verify the proposed method.}}, author = {{Unruh, Roland and Böcker, Joachim and Schafmeister, Frank}}, booktitle = {{2025 Energy Conversion Congress & Expo Europe (ECCE Europe)}}, keywords = {{Cascaded H-Bridge, Current Control, dq Transformation, Linear Regression, Unbalanced Inductors}}, location = {{Birmingham, United Kingdom}}, publisher = {{IEEE}}, title = {{{Three-Phase Instantaneous Current Controller for Unbalanced Grid Inductors Without DQ Transform for Cascaded H-Bridge Converters}}}, doi = {{10.1109/ecce-europe62795.2025.11238538}}, year = {{2025}}, } @article{63160, author = {{Rose, Hendrik and Schumacher, Stefan and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{24}}, publisher = {{American Physical Society (APS)}}, title = {{{Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons}}}, doi = {{10.1103/528f-7smh}}, volume = {{112}}, year = {{2025}}, } @article{63166, author = {{Jonas, Kristina and Abel, Miriam Katharina}}, issn = {{2193-6194}}, journal = {{Sprachförderung und Sprachtherapie in Schule und Praxis}}, number = {{4}}, pages = {{184--192}}, publisher = {{verlag modernes lernen}}, title = {{{Unterrichtsintegrierte Diagnostik im Förderschwerpunkt Sprache – ein Überblick}}}, volume = {{14}}, year = {{2025}}, } @book{63178, author = {{Jablonski, Simone}}, isbn = {{9783658477509}}, publisher = {{Springer Fachmedien Wiesbaden}}, title = {{{Modelling, Argumentation and Problem-Solving in the Context of Outdoor Mathematics}}}, doi = {{10.1007/978-3-658-47751-6}}, year = {{2025}}, } @article{63169, author = {{Taranto, E and Jablonski, S and Recio, T and Cunha, E and Ludwig, M and Mammana, MF}}, issn = {{2227-7102}}, number = {{3}}, title = {{{The Impact of a MOOC: Long-Term Analysis of Teachers' Learning Outcomes and Practices}}}, volume = {{15}}, year = {{2025}}, } @inbook{62646, author = {{Höink, Dominik and de Vos, J. Cornelis}}, booktitle = {{Musik im Ritual - Rituale in der Musik}}, editor = {{Caskel, Julian and Weißenfeld, Jana}}, pages = {{157–180}}, title = {{{"Sohn, dein Blut muß ich vergießen" - Ritual und Opfer in den Abraham-Oratorien des 19. Jahrhunderts}}}, year = {{2025}}, } @article{60639, author = {{Höink, Dominik}}, journal = {{Musik & Kirche}}, number = {{4}}, pages = {{254--257}}, title = {{{"In nomine Domini". Zum 100. Geburtstag des Komponisten Giselher Klebe}}}, volume = {{95}}, year = {{2025}}, } @book{63180, editor = {{Höink, Dominik and Werbick, Regina and Memering, Robert}}, title = {{{Friedrich Schneider, Christus der Meister. Oratorium in drei Teilen. Partitur}}}, doi = {{10.17879/41009673985}}, year = {{2025}}, } @inbook{61239, abstract = {{In diesem Beitrag wird ein Überblick gegeben, welche Forschung zu Digitalisierung und künstliche Intelligenz (KI) in den Bereichen Verwaltung, Forschung, Studium und Lehre sowie Governance von Hochschulen besteht. Der Fokus liegt hierbei auf aktuellen Forschungsergebnissen seit der Coronapandemie. Zentral sind Fragen nach Effektivität und Effizienz durch Digitalisierung und KI und danach, wie Verbesserungen angestoßen werden können.}}, author = {{Steinhardt, Isabel}}, booktitle = {{Hochschulforschung}}, editor = {{Pasternach, Peer and Reinmann, Gabi and Schneijderberg, Christian}}, isbn = {{9783748943334}}, keywords = {{Digitalisierung, Künstliche Intelligenz, Forschung, Lehre, Governance, Verwaltung}}, pages = {{197--206}}, publisher = {{Nomos}}, title = {{{Digitalisierung und Künstliche Intelligenz}}}, doi = {{10.5771/9783748943334-197}}, year = {{2025}}, } @inbook{61237, abstract = {{In diesem Beitrag wird zunächst die historische Entstehung von Open Science kurz skizziert und definiert, was unter diesem Begriff zu verstehen ist. Daran anschließend werden die Open-Science-Praktiken Open Data, Open Access, Open Source, Open Methodology und Open Peer Review dargestellt und diskutiert, welche Forschungserkenntnisse zu Open Science vorhanden sind. Im Schluss werden Forschungsdesiderate aufgegriffen und die Implikationen von Open Science für die Wissenschaft erläutert.}}, author = {{Steinhardt, Isabel and Röwert, Ronny}}, booktitle = {{Hochschulforschung}}, editor = {{Pasternack, Peer and Reinmann, Gabi and Schneijderberg, Christian }}, isbn = {{9783748943334}}, keywords = {{Open Data, Open Access, Open Source, Open Methodology, Open Peer Review}}, pages = {{487--496}}, publisher = {{Nomos}}, title = {{{Open Science}}}, doi = {{10.5771/9783748943334-487}}, year = {{2025}}, } @inbook{63183, author = {{Krause, Ina and Kiepe, Karina}}, booktitle = {{Ökonomie und Gesellschaft Jahrbuch 37: Nachhaltigkeit und soziale Gerechtigkeit}}, editor = {{Heise, Arne and Grözinger, Gert}}, pages = {{361--410}}, publisher = {{Metropolis-Verlag}}, title = {{{Transformation der deutschen Wirtschaft im Kontext nachhaltiger Entwicklung - Zur Rolle von Berufsbildung und ihrer Akteure}}}, year = {{2025}}, }