@article{64289, abstract = {{Abstract Motivated by asymptotic symmetry groups in general relativity, we consider projective unitary representations $$\overline{\rho }$$ ρ ¯ of the Lie group $${{\,\textrm{Diff}\,}}_c(M)$$ Diff c ( M ) of compactly supported diffeomorphisms of a smooth manifold M that satisfy a so-called generalized positive energy condition. In particular, this captures representations that are in a suitable sense compatible with a KMS state on the von Neumann algebra generated by $$\overline{\rho }$$ ρ ¯ . We show that if M is connected and $$\dim (M) > 1$$ dim ( M ) > 1 , then any such representation is necessarily trivial on the identity component $${{\,\textrm{Diff}\,}}_c(M)_0$$ Diff c ( M ) 0 . As an intermediate step towards this result, we determine the continuous second Lie algebra cohomology $$H^2_\textrm{ct}(\mathcal {X}_c(M), \mathbb {R})$$ H ct 2 ( X c ( M ) , R ) of the Lie algebra of compactly supported vector fields. This is subtly different from Gelfand–Fuks cohomology in view of the compact support condition.}}, author = {{Janssens, Bas and Niestijl, Milan}}, issn = {{0010-3616}}, journal = {{Communications in Mathematical Physics}}, number = {{2}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Generalized Positive Energy Representations of the Group of Compactly Supported Diffeomorphisms}}}, doi = {{10.1007/s00220-024-05226-w}}, volume = {{406}}, year = {{2025}}, } @inproceedings{59910, abstract = {{The connection between inconsistent databases and Dung’s abstract argumentation framework has recently drawn growing interest. Specifically, an inconsistent database, involving certain types of integrity constraints such as functional and inclusion dependencies, can be viewed as an argumentation framework in Dung’s setting. Nevertheless, no prior work has explored the exact expressive power of Dung’s theory of argumentation when compared to inconsistent databases and integrity constraints. In this paper, we close this gap by arguing that an argumentation framework can also be viewed as an inconsistent database. We first establish a connection between subset-repairs for databases and extensions for AFs considering conflict-free, naive, admissible, and preferred semantics. Further, we define a new family of attribute-based repairs based on the principle of maximal content preservation. The effectiveness of these repairs is then highlighted by connecting them to stable, semi-stable, and stage semantics. Our main contributions include translating an argumentation framework into a database together with integrity constraints. Moreover, this translation can be achieved in polynomial time, which is essential in transferring complexity results between the two formalisms.}}, author = {{Mahmood, Yasir and Hecher, Markus and Ngonga Ngomo, Axel-Cyrille}}, booktitle = {{Proceedings of the AAAI Conference on Artificial Intelligence}}, issn = {{2374-3468}}, number = {{14}}, pages = {{15058--15066}}, publisher = {{Association for the Advancement of Artificial Intelligence (AAAI)}}, title = {{{Dung’s Argumentation Framework: Unveiling the Expressive Power with Inconsistent Databases}}}, doi = {{10.1609/aaai.v39i14.33651}}, volume = {{39}}, year = {{2025}}, } @article{64551, abstract = {{Laterally coupled vertical-cavity surface-emitting lasers (VCSELs) can exhibit additional resonances at high modulation frequencies that can substantially increase the laser’s modulation bandwidth. State-of-the-art laterally coupled devices require non-standard manufacturing technology and precise tuning of the currents supplied to each cavity separately to form optical supermodes suitable for such resonances. Here, we report on a novel switching phenomenon in laterally coupled VCSEL structures having only a single common electric contact and manufactured in a standard oxide-confined VCSEL geometry. At lower currents, they can be operated in a weakly coupled (WCR) regime and, at higher currents, in an injection-locked (IL) regime, enabling fundamentally different spectral and dynamic features. In the WCR, both optical supermodes lase and a narrow tunable plasma-assisted peak at their beating frequency is observed for each of the apertures, with a current-dependent frequency tuning and anti-phase intensity oscillations in each of the cavities. In contrast, in the IL regimes, only one (anti-symmetric) supermode lases. This adds a broader resonance to the modulation response while the intensity oscillations in both cavities are in-phase. Only the IL regime can result in increased modulation bandwidth of the system. Measurements of the pulse responses and continuous modulation up to 70 GHz for both operational regimes are presented and compared with simulations of our distributed rate equation model whose parameters are extracted from full-wave electromagnetic simulations of the device, including the temperature distribution in the device. Excellent agreement is found and enables comprehensive understanding of the dynamics of supermodes in oxide-confined coupled cavity VCSELs.}}, author = {{Lindemann, M. and D’Alessandro, M. and Ledentsov, N. and Makarov, O. Y. and Ledentsov, N. N. and Tibaldi, A. and Gerhardt, Nils Christopher and Hofmann, M. R.}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, number = {{5}}, publisher = {{AIP Publishing}}, title = {{{Laterally coupled vertical-cavity surface-emitting lasers with tunable resonance width and frequency}}}, doi = {{10.1063/5.0275622}}, volume = {{138}}, year = {{2025}}, } @inproceedings{64293, author = {{Gerhardt, Nils Christopher and Hofmann, Martin R. and Zens, Leon and Möller, Jens and Besaga, Vira}}, booktitle = {{Practical Holography XXXIX: Displays, Materials, and Applications}}, title = {{{Quantitative holography for the characterisation of semiconductor amplifieres and lasers}}}, doi = {{10.1117/12.3041318}}, year = {{2025}}, } @article{50299, abstract = {{A finite classical polar space of rank $n$ consists of the totally isotropic subspaces of a finite vector space over $\mathbb{F}_q$ equipped with a nondegenerate form such that $n$ is the maximal dimension of such a subspace. A $t$-$(n,k,\lambda)$ design in a finite classical polar space of rank $n$ is a collection $Y$ of totally isotropic $k$-spaces such that each totally isotropic $t$-space is contained in exactly $\lambda$ members of $Y$. Nontrivial examples are currently only known for $t\leq 2$. We show that $t$-$(n,k,\lambda)$ designs in polar spaces exist for all $t$ and $q$ provided that $k>\frac{21}{2}t$ and $n$ is sufficiently large enough. The proof is based on a probabilistic method by Kuperberg, Lovett, and Peled, and it is thus nonconstructive.}}, author = {{Weiß, Charlene}}, journal = {{Des. Codes Cryptogr.}}, pages = {{971 -- 981}}, title = {{{Nontrivial $t$-designs in polar spaces exist for all $t$}}}, doi = {{10.1007/s10623-024-01471-1}}, volume = {{93}}, year = {{2025}}, } @article{64292, author = {{Lindemann, M. and D’Alessandro, M. and Ledentsov, N. and Makarov, O. Y. and Ledentsov, N. N. and Tibaldi, A. and Gerhardt, N. C. and Hofmann, M. R.}}, issn = {{1089-7550}}, journal = {{Journal of Applied Physics}}, number = {{5}}, publisher = {{AIP Publishing}}, title = {{{Laterally coupled vertical-cavity surface-emitting lasers with tunable resonance width and frequency}}}, doi = {{10.1063/5.0275622}}, volume = {{138}}, year = {{2025}}, } @inproceedings{61918, author = {{Rook, Jeroen and Renau, Quentin and Trautmann, Heike and Hart, Emma}}, booktitle = {{Proceedings of the 18th ACM/SIGEVO Conference on Foundations of Genetic Algorithms, FOGA 2025, Leiden, The Netherlands, August 27-29, 2025}}, pages = {{262–272}}, publisher = {{ACM}}, title = {{{Efficient Online Automated Algorithm Selection in the Face of Data-Drift in Optimisation Problem Instances}}}, doi = {{10.1145/3729878.3746615}}, year = {{2025}}, } @article{59258, author = {{Winkler, Michael}}, issn = {{0095-4616}}, journal = {{Applied Mathematics & Optimization}}, number = {{2}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Rough Data in an Evolution System Generalizing 1D Thermoviscoelasticity with Temperature-Dependent Parameters}}}, doi = {{10.1007/s00245-025-10243-9}}, volume = {{91}}, year = {{2025}}, } @misc{64736, booktitle = {{J. Lie Theory}}, editor = {{Frahm, Jan and Glöckner, Helge and Hilgert, Joachim and Olafsson, Gestur}}, number = {{4}}, title = {{{Special issue of Journal of Lie Theory dedicated to Karl-Hermann Neeb on the occasion of his 60th birthday}}}, volume = {{35}}, year = {{2025}}, } @phdthesis{64770, author = {{Pinaud, Matthieu}}, title = {{{Manifold of mappings and regularity properties of half-Lie groups}}}, doi = {{10.17619/UNIPB/1-2211}}, year = {{2025}}, } @inproceedings{62041, author = {{Reckmann, Eileen and Temmen, Katrin}}, booktitle = {{EDULEARN Proceedings}}, editor = {{Gómez Chova, Luis and González Martínez, Chelo and Lees, Joanna}}, issn = {{2340-1117}}, publisher = {{IATED}}, title = {{{Intrinsic Motivation in Stem Outreach: An Analysis of External Factors in Voluntary and School-Based Lab Settings}}}, doi = {{10.21125/edulearn.2025.2462}}, volume = {{1}}, year = {{2025}}, } @inproceedings{64795, author = {{Ebert, Marc and Temmen, Katrin}}, location = {{Oldenburg}}, title = {{{Über Rätsel zur Quantenphysik – Eine spielerische Heranführung an ein abstraktes Thema}}}, year = {{2025}}, } @inproceedings{61202, abstract = {{The number of datasets on the web of data increases continuously. However, the knowledge contained therein cannot be fully utilized without finding links between the entities contained in these datasets. Equivalent entities can not be identified solely by checking the equivalence of IRIs because of the different origins and naming schemes of different data providers. Yet, such equivalences can be discovered by computing the similarity of their attributes. In this paper we propose GLIDE, an approach that links entities from two different datasets by embedding a joint model of these datasets enriched by additional relations describing the similarity of literals. The joint model is embedded into a latent vector space while paying attention to juxtaposing similar literals. We evaluate our approach against state-of-the-art algorithms using real-world datasets commonly used in link discovery literature. The results show that GLIDE outperforms all baselines on 5 of 7 datasets with perfect or near-perfect accuracy. Our approach achieves its best performance on datasets that feature several literals with similarities. Our experiments indicate that researchers should not only pay attention to equal literals in knowledge graph embedding but should also be aware of the distance between similar literals.}}, author = {{Becker, Alexander and Ngonga Ngomo, Axel-Cyrille and Sherif, Mohamed }}, booktitle = {{The Semantic Web – ISWC 2025}}, keywords = {{becker sherif enexa sailproject dice simba ngonga whale}}, title = {{{GLIDE: Knowledge Graph Linking using Distance-Aware Embeddings}}}, year = {{2025}}, } @article{61134, author = {{Manzoor, Ali and Speck, René and Zahera, Hamada Mohamed Abdelsamee and Saleem, Muhammad and Moussallem, Diego and Ngonga Ngomo, Axel-Cyrille}}, issn = {{2169-3536}}, journal = {{IEEE Access}}, pages = {{1--1}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Multilingual Relation Extraction - A Survey}}}, doi = {{10.1109/access.2025.3604258}}, year = {{2025}}, } @inbook{61222, author = {{Lenke, Michael and Klowait, Nils and Biere, Lea and Schulte, Carsten}}, booktitle = {{Lecture Notes in Computer Science}}, isbn = {{9783032012210}}, issn = {{0302-9743}}, publisher = {{Springer Nature Switzerland}}, title = {{{Assessing AI Literacy: A Systematic Review of Questionnaires with Emphasis on Affective, Behavioral, Cognitive, and Ethical Aspects}}}, doi = {{10.1007/978-3-032-01222-7_8}}, year = {{2025}}, } @inproceedings{61396, author = {{Nölle, Florian and Schmid, Hans-Joachim and Bentrup, Leon Alexander and Temmen, Katrin}}, booktitle = {{MINT-Symposium}}, location = {{Nürnberg}}, title = {{{Erfolgreich Studieren - sinnvolle Lernstrategien erlernen (Posterbeitrag)}}}, year = {{2025}}, } @article{61445, abstract = {{ABSTRACT In recent years, there has been an increasing awareness of the importance of incorporating diversity into research projects, focusing on both how they are conducted and their content. Funding organizations have started to require that research applicants pay attention to inclusion and diversity by considering gender dimensions and other diversity factors in their project plans and ensuring gender equality during execution. Based on an extensive literature research and expert discussions on how to develop and implement diversity strategies in large collaborative research projects, we argue that there is a lack of practical advice in existing literature. Drawing from our own experiences in conceptualizing and implementing a Diversity Program across four universities in Germany, we propose a framework for effectively integrating diversity into collaborative research initiatives across various academic fields.}}, author = {{Lorke, Mariya and Amelung, Rena and Kuchling, Peter and Paaßen, Benjamin and Pein-Hackelbusch, Miriam and Schloots, Franziska Margarete and Schulz, Klara and Nauerth, Annette}}, journal = {{Diversity & Inclusion Research}}, keywords = {{collaborative research projects, diversity strategy, gender equality}}, number = {{4}}, pages = {{e70040}}, title = {{{Development and Implementation of Diversity Programs in Large Collaborative Research Projects: An Example From Germany}}}, doi = {{https://doi.org/10.1002/dvr2.70040}}, volume = {{2}}, year = {{2025}}, } @inproceedings{60970, author = {{Hebrok, Sven Niclas and Storm, Tim Leonhard and Cramer, Felix Matthias and Radoy, Maximilian Manfred and Somorovsky, Juraj}}, booktitle = {{34th USENIX Security Symposium}}, title = {{{STEK Sharing is Not Caring: Bypassing TLS Authentication in Web Servers using Session Tickets}}}, year = {{2025}}, } @article{61471, author = {{Governatori, Guido and Turhan, Anni-Yasmin}}, journal = {{Theory Pract. Log. Program.}}, number = {{2}}, pages = {{132–133}}, title = {{{Introduction to the Special Issue on Logic Rules and Reasoning: Selected Papers From the 6th International Joint Conference on Rules and Reasoning (RuleML+RR 2022)}}}, doi = {{10.1017/S1471068425000079}}, volume = {{25}}, year = {{2025}}, } @unpublished{59794, abstract = {{The depth of networks plays a crucial role in the effectiveness of deep learning. However, the memory requirement for backpropagation scales linearly with the number of layers, which leads to memory bottlenecks during training. Moreover, deep networks are often unable to handle time-series data appearing at irregular intervals. These issues can be resolved by considering continuous-depth networks based on the neural ODE framework in combination with reversible integration methods that allow for variable time-steps. Reversibility of the method ensures that the memory requirement for training is independent of network depth, while variable time-steps are required for assimilating time-series data on irregular intervals. However, at present, there are no known higher-order reversible methods with this property. High-order methods are especially important when a high level of accuracy in learning is required or when small time-steps are necessary due to large errors in time integration of neural ODEs, for instance in context of complex dynamical systems such as Kepler systems and molecular dynamics. The requirement of small time-steps when using a low-order method can significantly increase the computational cost of training as well as inference. In this work, we present an approach for constructing high-order reversible methods that allow adaptive time-stepping. Our numerical tests show the advantages in computational speed when applied to the task of learning dynamical systems.}}, author = {{Maslovskaya, Sofya and Ober-Blöbaum, Sina and Offen, Christian and Singh, Pranav and Wembe Moafo, Boris Edgar}}, title = {{{Adaptive higher order reversible integrators for memory efficient deep learning}}}, year = {{2025}}, }