@article{63495,
abstract = {{Inhalt Der Leitfaden der Wissenschaftlichen Gesellschaft für Produktentwicklung (WiGeP) dient als umfassende Orientierung für die Gestaltung der universitären Lehre im Bereich der Produktentwicklung. Er wurde überarbeitet, um aktuellen gesellschaftlichen Herausforderungen wie dem Klimawandel, sinkenden Studierendenzahlen und abnehmenden technischen Vorkenntnissen zu begegnen. Ein zentrales Anliegen ist es, Ingenieurinnen und Ingenieure zu befähigen, aktiv zur Lösung globaler Probleme beizutragen. Didaktisch wird der Einsatz moderner Lehrmethoden wie Projektarbeit, Flipped-Classroom, digitale Tools, VR-Lernen sowie adäquater Prüfungsformate nach Taxonomiestufen empfohlen. Inhaltlich stehen Maschinenelemente, methodische und virtuelle Produktentwicklung im Fokus, ergänzt durch interdisziplinäre Themen wie Nachhaltigkeit, Digitalisierung und Technikethik. Zudem wird die Bedeutung technischer Bildung an allgemeinbildenden Schulen hervorgehoben, um die Studierfähigkeit und Begeisterung für Technik frühzeitig zu fördern.
Der Leitfaden richtet sich an Lehrende an Hochschulen, Hochschuldidaktiker, Studiengangverantwortliche sowie bildungspolitische Entscheidungsträger und interessierte Akteure aus Gesellschaft und Industrie. Insgesamt versteht sich der Leitfaden als strategisches und operatives Werkzeug zur Weiterentwicklung der ingenieurwissenschaftlichen Lehre mit dem Ziel, exzellent ausgebildete und gesellschaftlich verantwortungsbewusste Produktentwicklerinnen und Produktentwickler für die Zukunft zu qualifizieren.}},
author = {{Bender, Beate and Husung, Stephan and Kirchner, Eckhard and Kletzin, Ulf and Kossack, Frederike and Lohrengel, Armin and Magyar, Balázs and Riedel, Oliver and Stahl, Karsten}},
issn = {{0720-5953}},
journal = {{Konstruktion}},
number = {{10}},
pages = {{54--65}},
publisher = {{VDI Fachmedien GmbH and Co. KG}},
title = {{{Universitäre Lehre in der Produktentwicklung/Academic teaching in product development}}},
doi = {{10.37544/0720-5953-2025-10-54}},
volume = {{77}},
year = {{2025}},
}
@article{59056,
author = {{Seeger, Karl and Genovese, Matteo and Schlüter, Alexander and Kockel, Christina and Corigliano, Orlando and Díaz Canales, Edith Benjamina and Praktiknjo, Aaron and Fragiacomo, Petronilla}},
issn = {{0360-3199}},
journal = {{International Journal of Hydrogen Energy}},
pages = {{558--576}},
publisher = {{Elsevier BV}},
title = {{{Techno-economic analysis of hydrogen and green fuels supply scenarios assessing three import routes: Canada, Chile, and Algeria to Germany}}},
doi = {{10.1016/j.ijhydene.2025.02.379}},
volume = {{116}},
year = {{2025}},
}
@article{63498,
author = {{Kirchgässner, Wilhelm and Förster, Nikolas and Piepenbrock, Till and Schweins, Oliver and Wallscheid, Oliver}},
journal = {{IEEE Transactions on Power Electronics}},
keywords = {{Mathematical models, Estimation, Data models, Convolutional neural networks, Accuracy, Magnetic hysteresis, Magnetic cores, Temperature measurement, Magnetic domains, Temperature distribution, Convolutional neural network (CNN), machine learning (ML), magnetics}},
number = {{2}},
pages = {{3326--3335}},
title = {{{HARDCORE: H-Field and Power Loss Estimation for Arbitrary Waveforms With Residual, Dilated Convolutional Neural Networks in Ferrite Cores}}},
doi = {{10.1109/TPEL.2024.3488174}},
volume = {{40}},
year = {{2025}},
}
@inproceedings{63496,
author = {{Foerster, Nikolas and Urbaneck, Daniel and Schenke, Maximilian and Ebers, Anastacia and Schoenlau, Nicolas and Wallscheid, Oliver and Schafmeister, Frank}},
booktitle = {{PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management}},
pages = {{2881--2890}},
title = {{{Improving the Usability of Calorimetric Measuring Chambers for Reliable Thermal Measurements}}},
doi = {{10.30420/566541386}},
year = {{2025}},
}
@article{60837,
abstract = {{In light of growing demands for resource efficiency and sustainability in vehicle engineering, the environmentally compatible separation of structural adhesive joints is gaining increasing relevance. This study presents a comparative analysis of two physically based debonding methods: the established hot-air process and a cryogenic cold process based on liquid nitrogen (LN2). The primary objective is to assess the ecological impact and process-related sustainability of both approaches.
Experimental investigations were conducted on a component-representative triple-sheet structure that simulates common automotive flange joints. Thermal input was applied either by convective heating using a hot air gun or by direct cooling through a contact-based LN2 tool. The resulting temperature profiles were recorded using spatially distributed thermocouples. Subsequently, the outer panel was selectively debonded to replicate a repair scenario, and the mechanical integrity of the remaining adhesive joint was evaluated through Mode I testing of L-shaped specimens. Process data served as input for an Life Cycle Assessment (LCA) according to DIN EN ISO 14040.
The cryogenic method achieved a 40% reduction in carbon footprint compared to the hot-air process (0.337 kg vs. 0.559 kg CO2-equivalents), primarily due to its shorter process time and more efficient heat transfer. While the hot-air method’s impact is mainly driven by electrical energy use, that of the cold method stems from cryogenic media consumption. Notwithstanding certain disadvantages in specific impact categories, the LN2-based process exhibits a superior overall ecological performance and signifies a promising solution for repair- and recycling-oriented adhesive separation in structural vehicle applications.}},
author = {{Jordan, Alex and Hermelingmeier, Lucas and Gilich, Julian and Meschut, Gerson and De Santis, Marco Sebastian and Schlüter, Alexander}},
issn = {{2666-3309}},
journal = {{Journal of Advanced Joining Processes}},
keywords = {{Sustainable debonding, Structural adhesives, Sustainable joining technologies, Life Cycle Assessment (LCA), Automotive repair process, Economically efficient debonding}},
publisher = {{Elsevier}},
title = {{{Comparison of the economic efficiency and sustainability of two debonding processes for structurally bonded sills}}},
doi = {{10.1016/j.jajp.2025.100332}},
volume = {{12}},
year = {{2025}},
}
@techreport{63209,
abstract = {{Die DFG-Projekte AddFeRo-PM (406108415) und AddFeRo-SR (465089065) untersuchten die Potenziale des LB-PBF/M-Verfahrens zur Herstellung von Rotoren für unterschiedliche elektrische Maschinen. Im interdisziplinären Ansatz wurden Materialentwicklung und mechanische sowie elektromagnetische Optimierung verbunden. Im Projekt „AddFeRo-PM“ wurde der Rotor einer permanentmagneterregten Synchron- maschine (PMSM) untersucht. FeSi erwies sich als geeignete Legierung, konnte aber wegen Spannungsrissen nur bis zu 3 % Siliziumanteil (kurz: FeSi3) verarbeitet werden. Mechanische und elektromagnetische Untersuchungen ermöglichten eine 3D-Optimierung der Rotorgeometrie und -struktur. Der Demonstrator wurde additiv gefertigt und zeigt Leicht-baupotenziale sowie reduzierte Drehmomentwelligkeit. Im Folgeprojekt „AddFeRo-SR“ kam eine Hochtemperatur-Bauraumheizung (HTBH) zum Einsatz, die FeSi mit 6,5 % Siliziumanteil verarbeitbar machte, welches bessere elektro- magnetische Eigenschaften bietet. Sie wurde bei einer Synchron-Reluktanzmaschine (SynRM) getestet. Eine hybride Rotorfertigung erwies sich jedoch aufgrund von HTBH-Einschränkungen als ungeeignet, weshalb eine einteilige Fertigung mit FeSi3 umgesetzt wurde. Experimente bestätigten vergleichbare Betriebsergebnisse zur konventionellen Fertigung bei reduzierter Rotormasse. Zusätzlich wurde eine Methodik entwickelt, um additive Verfahren als Ergänzung zur konventionellen Fertigung zu integrieren. Beide Projekte zeigen das Potenzial additiver Fertigung für Leichtbau und Wirkungsgradsteigerung im Elektromaschinenbau und bieten wertvolle Grundlagen für industrielle Anwendungen.}},
author = {{Haase, Michael and Behrendt, Marius and Hengsbach, Florian and Kunnathully Sathees Kumar, Vinay and Magerkohl, Sebastian and Magyar, Balázs and Ponick, Bernd and Schaper, Mirko and Zimmer, Detmar}},
keywords = {{Additive Fertigung, Elektromotor, Leichtbau, Synchronmotor, DFG}},
publisher = {{Technische Informationsbibliothek}},
title = {{{Additive Fertigung im Elektromaschinenbau: Erforschung von Potentialen der additiven Fertigung in Rotoren permanentmagneterregter Synchronmaschinen}}},
doi = {{10.34657/26753}},
year = {{2025}},
}
@article{60681,
author = {{Díaz Canales, Edith Benjamina and Avila Galarza, Alfredo and Schlüter, Sabine and Lacayo Escobar, Erick and Schlüter, Alexander}},
issn = {{3044-5221}},
journal = {{Journal of Sustainable Development Indicators}},
number = {{2}},
pages = {{1--26}},
publisher = {{SDEWES Centre}},
title = {{{Implementing Strategic Environmental Assessment in the Global South, a Challenge: Nicaragua as a Case Study}}},
doi = {{10.13044/j.sdi.d2.0592}},
volume = {{1}},
year = {{2025}},
}
@inbook{59841,
author = {{Genovese, Matteo and Piraino, Francesco and Corigliano, Orlando and Schlüter, Alexander and Scionti, Eugenio and Fragiacomo, Petronilla}},
booktitle = {{Accelerating the Transition to a Hydrogen Economy}},
isbn = {{9780443240027}},
publisher = {{Elsevier}},
title = {{{Hydrogen economy development in the European Union}}},
doi = {{10.1016/b978-0-443-24002-7.00005-7}},
year = {{2025}},
}
@article{63505,
abstract = {{Abstract
The main goal of this work is to study the $L^{p}$-asymptotic behavior of solutions to the heat equation on arbitrary rank Riemannian symmetric spaces of non-compact-type $G/K$ for non-bi-$K$ invariant initial data. For initial data $u_{0}$ compactly supported or in a weighted $L^{1}(G/K)$ space with a weight depending on $p\in [1, \infty ]$, we introduce a mass function $M_{p}(u_{0})(\cdot )$, and prove that if $h_{t}$ is the heat kernel on $G/K$, then $$ \begin{align*} &\|h_t\|_p^{-1}\,\|u_0\ast h_t \, - \,M_p(u_0)(\cdot)\,h_t\|_p \rightarrow 0 \quad \textrm{as} \quad t\rightarrow \infty.\end{align*} $$ Interestingly, the $L^{p}$ heat concentration leads to completely different expressions of the mass function for $1\leq p <2$ and $2\leq p\leq \infty $. If we further assume that the initial data are bi-$K$-invariant, then our mass function boils down to the constant $\int _{G/K}u_{0}$ in the case $p=1$, and more generally to $\mathcal{H}{u_{0}}(i\rho (2/p-1))$ if $1\leq p<2$, and to $\mathcal{H}{u_{0}}(0)$ if $2\leq p \leq \infty $. Thus, we improve upon results by Vázquez, Anker et al., and Naik et al., clarifying the nature of the problem.}},
author = {{Papageorgiou, Effie}},
issn = {{1073-7928}},
journal = {{International Mathematics Research Notices}},
number = {{7}},
publisher = {{Oxford University Press (OUP)}},
title = {{{L
p Asymptotics for the Heat Equation on Symmetric Spaces for Non-symmetric Solutions}}},
doi = {{10.1093/imrn/rnaf074}},
volume = {{2025}},
year = {{2025}},
}
@article{63503,
author = {{Bruno, Tommaso and Papageorgiou, Effie}},
issn = {{0021-7670}},
journal = {{Journal d'Analyse Mathématique}},
number = {{2}},
pages = {{733--767}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Pointwise convergence to initial data for some evolution equations on symmetric spaces}}},
doi = {{10.1007/s11854-025-0403-2}},
volume = {{157}},
year = {{2025}},
}
@inproceedings{61753,
abstract = {{This paper presents LOLA, a massively multilingual large language model trained on more than 160 languages using a sparse Mixture-of-Experts Transformer architecture. Our architectural and implementation choices address the challenge of harnessing linguistic diversity while maintaining efficiency and avoiding the common pitfalls of multilinguality. Our analysis of the evaluation results shows competitive performance in natural language generation and understanding tasks. Additionally, we demonstrate how the learned expert-routing mechanism exploits implicit phylogenetic linguistic patterns to potentially alleviate the curse of multilinguality. We provide an in-depth look at the training process, an analysis of the datasets, and a balanced exploration of the model{’}s strengths and limitations. As an open-source model, LOLA promotes reproducibility and serves as a robust foundation for future research. Our findings enable the development of compute-efficient multilingual models with strong, scalable performance across languages.}},
author = {{Srivastava, Nikit and Kuchelev, Denis and Moteu Ngoli, Tatiana and Shetty, Kshitij and Röder, Michael and Zahera, Hamada Mohamed Abdelsamee and Moussallem, Diego and Ngonga Ngomo, Axel-Cyrille}},
booktitle = {{Proceedings of the 31st International Conference on Computational Linguistics}},
editor = {{Rambow, Owen and Wanner, Leo and Apidianaki, Marianna and Al-Khalifa, Hend and Eugenio, Barbara Di and Schockaert, Steven}},
pages = {{6420–6446}},
publisher = {{Association for Computational Linguistics}},
title = {{{LOLA – An Open-Source Massively Multilingual Large Language Model}}},
year = {{2025}},
}
@inbook{63507,
author = {{Pandit, Gaurav and Röder, Michael and Ngonga Ngomo, Axel-Cyrille}},
booktitle = {{Lecture Notes in Computer Science}},
isbn = {{9783031945748}},
issn = {{0302-9743}},
publisher = {{Springer Nature Switzerland}},
title = {{{Evaluating Approximate Nearest Neighbour Search Systems on Knowledge Graph Embeddings}}},
doi = {{10.1007/978-3-031-94575-5_4}},
year = {{2025}},
}
@phdthesis{63511,
abstract = {{Der unsystematische und ineffiziente Umgang mit technischen Änderungen führt zuhohen Personalkosten durch Mehraufwand, einer reduzierten Entscheidungsqualität und kannin Projektfehlschlägen resultieren. Herausforderungen beim Umgang mit technischen Änderungenliegen in der Berücksichtigung relevanter Ursache-Wirkungs-Zusammenhänge, der quantitativen und qualitativen Bewertung der Auswirkungen und der effizienten prozessualen Einbindung. Mithilfe eines modellbasierten Lösungsansatzes lassen sich die Auswirkungen technischer Änderungen schneller bewerten und fundierte Entwicklungsentscheidungen treffen. In der vorliegenden Dissertation wird eine Methodik für die Entwicklung modell-basierter Wirkkettenanalysen zur Bewertung technischer Änderungen beschrieben. Durch die modellbasierte Wirkkettenanalyse können direkt oder indirekt von der Änderung betroffene Modellelemente identifiziert werden. Das Datenmodell wird mithilfe von Abfragesprachen analysiert und die Auswirkungen werden mithilfe von integrierten Metriken quantifiziert. Die Ergebnisse der Wirkkettenanalyse werden in rollenspezifischen Sichten bereitgestellt, wodurch eine bedarfsgerechte Entscheidungsunterstützung gewährleistet wird. Die Validierung anhand von vier industriellen Fallstudien belegt die Praxistauglichkeit der Methodik. Die Methodik verbindet das Änderungsmanagement mit den Vorteilen einer modellbasierten Systementwicklung und bildet somit einen synergetischen neuen Forschungsbereich.}},
author = {{Wiechel, Dominik}},
isbn = {{978-3-947647-51-4}},
issn = {{2365-4422}},
title = {{{Modellbasierte Wirkkettenanalyse zur Bewertung technischer Änderungen}}},
doi = {{10.17619/UNIPB/1-2473}},
volume = {{432}},
year = {{2025}},
}
@inproceedings{62924,
author = {{Wittkopp, Laura and Pollmeier, Pascal and Fechner, Sabine}},
booktitle = {{Jahrestagung der Gesellschaft für Didaktik der Chemie und Physik e.V. (GDCP)}},
location = {{Frankfurt am Main}},
title = {{{Effekte nachhaltigkeitsbezogener Kontexte beim Chemielernen}}},
year = {{2025}},
}
@unpublished{63510,
abstract = {{It has been shown recently that optimal control problems with the dynamical constraint given by a second order system admit a regular Lagrangian formulation. This implies that the optimality conditions can be obtained in a new form based on the variational approach. In this paper we extend the first order necessary optimality conditions obtained previously to second order optimality conditions. This results in a complete characterization of the optimality conditions in a new Lagrangian form.}},
author = {{Konopik, Michael and Leyendecker, Sigrid and Maslovskaya, Sofya and Sina Ober-Blöbaum, Sina Ober-Blöbaum and Almagro, Rodrigo T. Sato Martín de}},
booktitle = {{arXiv:2507.06024}},
title = {{{Second order optimality conditions in a new Lagrangian formulation for optimal control problems}}},
year = {{2025}},
}
@article{59797,
author = {{Konopik, Michael and T. Sato Martín de Almagro, Rodrigo and Maslovskaya, Sofya and Ober-Blöbaum, Sina and Leyendecker, Sigrid}},
journal = {{Journal of Nonlinear Science}},
number = {{11}},
title = {{{Variational integrators for a new Lagrangian approach to control affine systems with a quadratic Lagrange term}}},
doi = {{10.1007/s00332-025-10229-5}},
volume = {{36}},
year = {{2025}},
}
@article{59799,
author = {{Konopik, Michael and Leyendecker, Sigrid and Maslovskaya, Sofya and Ober-Blöbaum, Sina and T. Sato Martín de Almagro, Rodrigo}},
journal = {{Nonlinearity}},
number = {{11}},
title = {{{A new Lagrangian approach to optimal control of second-order systems}}},
doi = {{10.1088/1361-6544/ae1d08}},
volume = {{38}},
year = {{2025}},
}
@article{63091,
abstract = {{We present the design and characterization of a guided-wave, bright, and highly frequency non-degenerate parametric down-conversion (PDC) source in thin-film lithium niobate. The source generates photon pairs with wavelengths of 815 nm and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths. We confirm the high quality of the generated single photons by determining a value for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3). Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which is two orders of magnitude higher than sources based on weakly guiding waveguides. The shape of the PDC spectrum and the strong agreement between the effective and nominal bandwidth highlight our high fabrication quality of periodically poled waveguides. The good agreement between the measured and simulated spectral characteristics of our source demonstrates our excellent understanding of the PDC process. Our result is a valuable step towards practical and scalable quantum communication networks as well as photonic quantum computing.}},
author = {{Babel, Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin and Eigner, Christof and Padberg, Laura and Silberhorn, Christine}},
issn = {{1094-4087}},
journal = {{Optics Express}},
number = {{25}},
publisher = {{Optica Publishing Group}},
title = {{{Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths}}},
doi = {{10.1364/oe.571605}},
volume = {{33}},
year = {{2025}},
}
@article{62713,
abstract = {{Periodically poled thin-film lithium niobate (TFLN) crystals are the fundamental building block for highly-efficient quantum light sources and frequency converters. The efficiency of these devices is strongly dependent on the interaction length between the light and the nonlinear material, scaling quadratically with this parameter. Nevertheless, the fabrication of long, continuously poled areas in TFLN remains challenging, the length of continuously poled areas rarely exceeds 10 mm. In this work, we demonstrate a significant progress in this field achieving the periodic poling of continuous poled areas of 70 mm length with a 3 μm poling period and a close to 50 % duty cycle. We compare two poling electrode design approaches to fabricate long, continuous poled areas. The first approach involves the poling of a single, continuous 70 mm long electrode. The second utilize a segmented approach including the poling of more than 20 individual sections forming together a 70 mm long poling area with no stitching errors. While the continuous electrode allows for faster fabrication, the segmented approach allows to individually optimize the poling resulting in less duty cycle variation. A detailed analysis of the periodic poling results reveals that the results of both are consistent with previously reported poling outcomes for shorter devices. Thus, we demonstrate wafer-scale periodic poling exceeding chiplet-size without any loss in the periodic poling quality. Our work presents a key step towards highly-efficient, narrow-bandwidth and low-pump power nonlinear optical devices.}},
author = {{Bollmers, Laura and Spiegelberg, Noah and Rüsing, Michael and Eigner, Christof and Padberg, Laura and Silberhorn, Christine}},
issn = {{2192-8606}},
journal = {{Nanophotonics}},
pages = {{4761}},
publisher = {{Walter de Gruyter GmbH}},
title = {{{Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate}}},
doi = {{10.1515/nanoph-2025-0461}},
volume = {{14}},
year = {{2025}},
}
@article{63518,
author = {{Hagengruber, Ruth Edith}},
journal = {{ZDPE}},
publisher = {{Bettina Bussmann und Vanessa Albus}},
title = {{{Eine Demokratie, die das Recht der Frauen nicht verwirklicht, ist nichtig". Das politische Meisterstücke der Olympe de Gouges (1748-1793)}}},
volume = {{3}},
year = {{2025}},
}