@article{65316, abstract = {{Metasurfaces are powerful tools for manipulating light using small structures on the nanoscale. In most metasurfaces, near-field couplings are treated as being unfavorable perturbations. Here, we experimentally investigate a structure consisting of sinusoidally modulated silicon waveguides where near-field coupling of local resonances leads to negative coupling, i.e., a negative coupling constant. This gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular polarizations. In particular, fully circular polarization states are not only present at a single point in momentum space (k-space) but also along a line. This circular polarization line, as well as a linear polarization line, emanates from a polarization degeneracy at the Dirac point. We experimentally validate the existence of these eigenstates and demonstrate the energy-, polarization-, and wave vector dependence of this metasurface as well as its sensitivity to fabrication tolerances. By tuning the incident k-vector, certain polarization-energy eigenstates are strongly reflected, allowing for uses in angle-tunable polarization filters and light sources.}}, author = {{Wetter, Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher, Stefan and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{metasurface, waveguides, Dirac point, polarization, negative coupling}}, pages = {{2128--2133}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}}}, doi = {{10.1021/acsphotonics.5c02865}}, volume = {{13}}, year = {{2026}}, } @article{65458, author = {{Hamdoun, Ayoub and Mahnken, Rolf and Ostwald, Richard}}, journal = {{European Journal of Mechanics / A Solids}}, title = {{{A gradient-damage model for amorphous glassy polymers: Consistent formulation of viscoplasticity and damage evolution in a micromorphic framework}}}, doi = {{https://doi.org/10.1016/j.euromechsol.2026.106137}}, year = {{2026}}, } @article{61152, abstract = {{While neural network quantization effectively reduces the cost of matrix multiplications, aggressive quantization can expose non-matrix-multiply operations as significant performance and resource bottlenecks on embedded systems. Addressing such bottlenecks requires a comprehensive approach to tailoring the precision across operations in the inference computation. To this end, we introduce scaled-integer range analysis (SIRA), a static analysis technique employing interval arithmetic to determine the range, scale, and bias for tensors in quantized neural networks. We show how this information can be exploited to reduce the resource footprint of FPGA dataflow neural network accelerators via tailored bitwidth adaptation for accumulators and downstream operations, aggregation of scales and biases, and conversion of consecutive elementwise operations to thresholding operations. We integrate SIRA-driven optimizations into the open-source FINN framework, then evaluate their effectiveness across a range of quantized neural network workloads and compare implementation alternatives for non-matrix-multiply operations. We demonstrate an average reduction of 17\% for LUTs, 66\% for DSPs, and 22\% for accumulator bitwidths with SIRA optimizations, providing detailed benchmark analysis and analytical models to guide the implementation style for non-matrix layers. Finally, we open-source SIRA to facilitate community exploration of its benefits across various applications and hardware platforms.}}, author = {{Umuroglu, Yaman and Berganski, Christoph and Jentzsch, Felix and Danilowicz, Michal and Kryjak, Tomasz and Bezaitis, Charalampos and Sjalander, Magnus and Colbert, Ian and Preusser, Thomas and Petri-Koenig, Jakoba and Blott, Michaela}}, issn = {{1936-7406}}, journal = {{ACM Transactions on Reconfigurable Technology and Systems}}, title = {{{SIRA: Scaled-Integer Range Analysis for Optimizing FPGA Dataflow Neural Network Accelerators}}}, doi = {{10.1145/3807510}}, year = {{2026}}, } @phdthesis{61464, abstract = {{Der eugenetische Roman ist als ein literarisches Genre zu begreifen, das biowissenschaftliche, bioethische und biopoetische Dimensionen miteinander verbindet, um Grenzen und Konstanten des Mensch(lich)en auszuhandeln. Mindestens seit Darwin und Galton sind die Modifizierung des menschlichen Individuums und die Optimierung der menschlichen Spezies diskutiert worden, spätestens seit den 1980er Jahren haben humangenetische und biotechnologische Entwicklungen den Diskurs neu perspektiviert. Literatur trägt zu diesem Diskurs bei, indem sie Erprobungs- und Reflexionsräume schafft: Sie modelliert menschliche Subjekte, die in eugenetische Zukunftsszenarien eingeschrieben sind, und entwickelt spezifische Erzählweisen, die diese Subjekte, ihre Lebensweisen und ihr Lebenswissen, narrativ erfahrbar machen. Fünf eugenetische Romane der englisch- und deutschsprachigen Gegenwartsliteratur werden in der Studie hinsichtlich Subjektmodellierungen und Narrationsweisen im Kontext der Eugenetik untersucht.}}, author = {{Hannebohm, Ronja}}, isbn = {{978-3-7705-7106-2}}, keywords = {{Ethik, Eugenik, Genre, Lebenswissen, Macht, Metamoderne, Narration, Postmoderne, Subjekt, Zukunft}}, publisher = {{Brill | Fink}}, title = {{{Nach 1984: Biopoethik des eugenetischen Romans}}}, year = {{2026}}, } @inproceedings{61922, abstract = {{We present an extremely simple polynomial-space exponential-time $(1-\varepsilon)$-approximation algorithm for MAX-k-SAT that is (slightly) faster than the previous known polynomial-space $(1-\varepsilon)$-approximation algorithms by Hirsch (Discrete Applied Mathematics, 2003) and Escoffier, Paschos and Tourniaire (Theoretical Computer Science, 2014). Our algorithm repeatedly samples an assignment uniformly at random until finding an assignment that satisfies a large enough fraction of clauses. Surprisingly, we can show the efficiency of this simpler approach by proving that in any instance of MAX-k-SAT (or more generally any instance of MAXCSP), an exponential number of assignments satisfy a fraction of clauses close to the optimal value.}}, author = {{Buhrman, Harry and Gharibian, Sevag and Landau, Zeph and Gall, François Le and Schuch, Norbert and Tamaki, Suguru}}, booktitle = {{SIAM Symposium on Simplicity in Algorithms (SOSA)}}, pages = {{247--253}}, title = {{{A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT}}}, year = {{2026}}, } @article{65386, abstract = {{Abstract Risk is an integral part of modern societies and therefore school education, and in particular mathematics education, should develop students’ risk literacy. Students’ risk literacy is part of the interdisciplinary research project siMINT (Understanding complex STEM topics: Using simulations to promote competences for the 21st century). One first challenge in this project was to find a common ground for the inconsistently conceptualised terms of risk and risk literacy. Consequently, the aim of this paper is to contribute to the conceptualisation of risk and risk literacy. The first part of this paper provides a literature review on these areas, resulting in a working conceptualisation of the two concepts. We further carried out two consecutive steps of a Delphi study with N  = 15 and N  = 12 experts respectively, to develop a common conceptualisation based on the plurality of different dimensions and elements of risk and risk literacy. Based on the results of the first step of the Delphi study, we modified our working conceptualisation, using a common model of risk and risk literacy with different dimensions. In the second step of the Delphi study, the experts comment on (i) the dimensions and (ii) the elements of risk and risk literacy in these dimensions. The results showed that the experts are able to locate their individual definitions of risk in the model with three dimensions (relation between risk/uncertainty, connotation, and mathematical object) that we developed and to formulate reasons for their allocation. Furthermore, the results revealed that risk literacy consists of subsets of mathematical and non-mathematical elements that the experts rate differently with regard to their importance. In general, the results contribute to clarifying the constructs of risk and risk literacy as a basis for developing approaches to improve risk literacy. }}, author = {{Eichler, Andreas and Büchter, Theresa and Binder, Karin}}, issn = {{0173-5322}}, journal = {{Journal für Mathematik-Didaktik}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Conceptualising Risk and Risk Literacy—results of a Delphi Study Konzeptualisierung von Risiko und Risikokompetenz – Ergebnisse einer Delphi-Studie}}}, doi = {{10.1007/s13138-026-00268-0}}, volume = {{47}}, year = {{2026}}, } @article{64580, abstract = {{ There is a contradiction between seven meta-analyses, all of which indicate a substantial benefit of the flipped classroom (FC) method for K-12 teaching and some larger study that found no such benefit when compared to “traditional” teaching. In the theoretical part of the paper, we shed light on this contradiction by consulting general literature on meta-analyses. Ranking the 50 included FC studies by the number of classes per experimental condition, we found a negative correlation between the “size” of a study and the effect in favor of FC. In the empirical part, we present an FC study with three conditions concerning mathematical teaching, based on n  = 950 students aged 11–13, in which many relevant covariates (e.g., quality of instruction) were addressed. One FC condition was based on students’ knowledge acquisition through instructional videos at home (FCn: n  = 12 classes). Considering that self-regulation support might play a crucial role especially for young students working at home, another FC condition (FCS: n  = 12 classes) was implemented, in which students could learn additional math-free strategies concerning watching instructional videos. Both FC-conditions were experimentally compared with a control group of traditional teaching (TT: n  = 13 classes). No significant effect on learning gains was found between FCn and TT, indicating that “flipping” alone may not be more effective per se. However, a significant difference was found between FCS and FCn. Thus, supporting students’ self-regulation in addition may in indeed open the door to successful FC, even with very young students. }}, author = {{Wiesner, Patrick and Krauss, Stefan and Stegmüller, Nathalie and Binder, Karin}}, issn = {{2504-284X}}, journal = {{Frontiers in Education}}, publisher = {{Frontiers Media SA}}, title = {{{Is flipped classroom really superior?—Questioning the flip in K-12 teaching}}}, doi = {{10.3389/feduc.2026.1741733}}, volume = {{11}}, year = {{2026}}, } @proceedings{64797, editor = {{Birk, Lisa and Loth, Gerrit and Jotzo, Luca and Binder, Karin and Frischemeier, Daniel}}, location = {{Münster}}, publisher = {{International Association for Statistics Education}}, title = {{{14th IASE Satellite Conference "Statistics and Data Science Education in STEAM"}}}, doi = {{10.52041/iase25.158}}, year = {{2026}}, } @inproceedings{64581, author = {{Binder, Karin and Schnaitmann, Stephan and Erickson, Tim}}, booktitle = {{Proceedings of the IASE 2025 Satellite Conference - Statistics and Data Science Education in STEAM}}, editor = {{Birk, Lisa and Loth, Gerrit and Jotzo, Luca and Binder, Karin and Frischemeier, Daniel}}, publisher = {{International Association for Statistics Education}}, title = {{{Effects of a simulation-based training on students conceptual understanding of the Binomial test}}}, doi = {{10.52041/iase25.106}}, year = {{2026}}, } @inproceedings{64583, author = {{Büchter, Theresa and Binder, Karin and Eichler, Andreas}}, booktitle = {{Proceedings of the IASE 2025 Satellite Conference - Statistics and Data Science Education in STEAM}}, editor = {{Birk, Lisa and Loth, Gerrit and Jotzo, Luca and Binder, Karin and Frischemeier, Daniel}}, publisher = {{International Association for Statistics Education}}, title = {{{The integration of probability-based arguments in risk-related contexts}}}, doi = {{10.52041/iase25.125}}, year = {{2026}}, } @inproceedings{61777, abstract = {{Classical shadows are succinct classical representations of quantum states which allow one to encode a set of properties P of a quantum state rho, while only requiring measurements on logarithmically many copies of rho in the size of P. In this work, we initiate the study of verification of classical shadows, denoted classical shadow validity (CSV), from the perspective of computational complexity, which asks: Given a classical shadow S, how hard is it to verify that S predicts the measurement statistics of a quantum state? We show that even for the elegantly simple classical shadow protocol of [Huang, Kueng, Preskill, Nature Physics 2020] utilizing local Clifford measurements, CSV is QMA-complete. This hardness continues to hold for the high-dimensional extension of said protocol due to [Mao, Yi, and Zhu, PRL 2025]. Among other results, we also show that CSV for exponentially many observables is complete for a quantum generalization of the second level of the polynomial hierarchy, yielding the first natural complete problem for such a class.}}, author = {{Karaiskos, Georgios and Rudolph, Dorian and Meyer, Johannes Jakob and Eisert, Jens and Gharibian, Sevag}}, booktitle = {{International Colloquium on Automata, Languages, and Programming (ICALP)}}, title = {{{How hard is it to verify a classical shadow?}}}, year = {{2026}}, } @article{65465, author = {{Henschen, Patrick and Töpfer, Lew}}, journal = {{ffk Journal}}, number = {{11}}, pages = {{171–183}}, title = {{{Images of Climate Crises. Critical Remarks on Climate-Technical Imagery Production and the Possibilities of Desirable Futures}}}, doi = {{http://dx.doi.org/10.25969/mediarep/24633}}, year = {{2026}}, } @article{65476, abstract = {{Service research has evolved into an interdisciplinary research field that bridges diverse disciplines, including information systems (IS) and marketing. Nearly two decades ago, the service system concept was introduced as a foundational abstraction in service research, drawing on ideas from the service-dominant logic (S-D logic) of marketing. Despite its widespread adoption in service research, particularly in the IS discipline, the service system concept lacks a solid theoretical foundation. This has resulted in conceptual ambiguity and overlap with related constructs, such as service ecosystems. Moreover, it has largely remained a static analytical lens, insufficiently capturing dynamic service phenomena, including value co-creation and co-destruction, as well as the emergence of institutional arrangements. To address these limitations, we propose Luhmann’s systems theory (LST) as a robust framework for conceptualizing service systems as autopoietic (self-creating) systems, in which communication serves as the fundamental mechanism that drives value co-creation. We derive five theoretical propositions from this re-conceptualization that clarify conceptual ambiguity and allow researchers to explore dynamic service phenomena in greater depth. Given LST’s general approach, our conceptualization provides a theoretically grounded, interdisciplinary foundation for advancing service research.}}, author = {{Beverungen, Daniel and Poeppelbuss, Jens and Hemmrich, Simon and Iqbal, Taskeen}}, issn = {{1019-6781}}, journal = {{Electronic Markets}}, keywords = {{Service system, Service ecosystem, Systems theory, Service research}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Service through communication—Conceptualizing service systems with Luhmann’s systems theory}}}, doi = {{10.1007/s12525-026-00889-w}}, volume = {{36}}, year = {{2026}}, } @inproceedings{65483, abstract = {{Clinched joints with non-rotationally symmetric geometries exhibit orientation-dependent mechanical behavior that is commonly neglected in structural-scale simulations. Reuleaux triangle shaped clinched joints, in particular, show pronounced in-plane anisotropy depending on their orientation. While such effects have been studied at joint and specimen scale, their relevance at the structural level remains largely unexplored. In this work, the influence of joint orientation on the bending response of a joined structure is investigated using numerical simulations. A simplified joint replacement model based on the *CONSTRAINED_SPR2 point-connector formulation in LS-DYNA is employed, with parameters calibrated from previously obtained experimental force displacement data. A hat shaped profile structure subjected to three-point bending is analyzed in a parametric study considering variations in joint orientation, joint spacing, and profile geometry. The results show that joint orientation has little influence during the initial deformation phase but becomes increasingly significant at larger displacements, where joint behavior governs load transfer. Orientation dependent effects are found to influence the global force displacement response and local load redistribution among joints, with magnitudes comparable to those induced by changes in joint spacing and structural geometry. The findings confirm that joint orientation effects remain relevant at the structural level and should be considered in the design of structures assembled using non-rotationally symmetric clinched joints.}}, author = {{Devulapally, Deekshith Reddy and Tröster, Thomas}}, booktitle = {{Materials Science Forum}}, issn = {{1662-9752}}, pages = {{161--169}}, publisher = {{Trans Tech Publications, Ltd.}}, title = {{{A Numerical Study on the Mutual Influence of Joint Orientation and Component Geometry in Non-Rotationally Symmetric Clinched Joints}}}, doi = {{10.4028/p-0tiihi}}, volume = {{1185}}, year = {{2026}}, } @article{65480, abstract = {{Die Bonner Ethik-Erklärung/Über Künstliche Intelligenzen, Bildung und Subjektwerdung/Tagungsberichte}}, author = {{Reichenbach, Alexandra Maria and Jäde, Sylvia}}, issn = {{1436-1957}}, journal = {{ZSE (Zeitschrift für Soziologie der Erziehung und Sozialisation)}}, number = {{1}}, pages = {{114--117}}, publisher = {{Beltz Verlagsgruppe GmbH & Co. KG}}, title = {{{Erziehungswissenschaftliche Perspektiven auf Familie und ihre Öffentlichkeit(en). Bericht zur Tagung des Netzwerks Erziehungswissenschaftliche Familienforschung (EWIFF) „Familie und ihre Öffentlichkeit(en)“ von 7. bis 8. Juni an der Universität Erfurt.}}}, doi = {{10.3262/zse2601101}}, volume = {{46}}, year = {{2026}}, } @article{65481, author = {{Schönert, Kathrin and Sommer, Sabrina and Buhl, Heike M.}}, journal = {{Zeitschrift für Entwicklungspsychologie und Pädagogische Psychologie}}, publisher = {{Hogrefe}}, title = {{{Prädiktoren der persönlichen Verpflichtung in Eltern-Kind-Beziehungen im Erwachsenenalter}}}, doi = {{10.1026/0049-8637/a000315}}, year = {{2026}}, } @misc{65482, author = {{Hüwel, Fabian}}, title = {{{Untersuchung der Einflussfaktoren auf die Recyclingfähigkeit von flammgeschütztem Polyamid 12-Pulver beim selektiven Lasersintern (Studienarbeit)}}}, year = {{2026}}, } @inbook{44862, author = {{Peckhaus, Volker}}, booktitle = {{New Perspectives on Neo-Kantianism and the Sciences}}, editor = {{Pulte, Helmut and Baedke, Jan and Koenig, Daniel and Nickel, Gregor}}, pages = {{17--37}}, publisher = {{Routledge}}, title = {{{(Neo-)Kantian Foundation of Foundations: The Göttingen Case}}}, year = {{2025}}, } @book{55650, editor = {{Eke, Norbert Otto and Ludwig , Janine and Vaßen, Florian }}, pages = {{172}}, title = {{{1. Heiner-Müller-Jahrbuch 1: Heiner Müllers Natur.}}}, year = {{2025}}, } @article{32099, author = {{Weich, Tobias and Budde, Julia}}, journal = {{Journal of Functional Analysis}}, number = {{1}}, title = {{{Wave Front Sets of Nilpotent Lie Group Representations}}}, doi = {{ https://doi.org/10.1016/j.jfa.2024.110684}}, volume = {{288}}, year = {{2025}}, }