@inbook{51125, author = {{Schulze, J. and Eickelmann, Birgit and Drossel, Kerstin}}, booktitle = {{Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven}}, editor = {{Herzig, B. and Eickelmann, Birgit and Schwabl, F. and Schulze, J. and Niemann, J.}}, publisher = {{Waxmann Verlag GmbH}}, title = {{{Schulentwicklung, Chancengerechtigkeit und Digitalität – Verbindung zentraler Metathemen in einer zeitgemäßen Lehrkräftebildung}}}, year = {{2024}}, } @article{51104, author = {{Liang, Qian and Ma, Xuekai and Gu, Chunling and Ren, Jiahuan and An, Cunbin and Fu, Hongbing and Schumacher, Stefan and Liao, Qing}}, journal = {{Journal of the American Chemical Society (JACS)}}, title = {{{Photochemical Reaction Enabling the Engineering of Photonic Spin−Orbit Coupling in Organic-Crystal Optical Microcavities}}}, doi = {{10.1021/jacs.3c11373}}, year = {{2024}}, } @article{51106, author = {{Schneider, Tobias and Gao, Wenlong and Zentgraf, Thomas and Schumacher, Stefan and Ma, Xuekai}}, journal = {{Nanophotonics}}, title = {{{Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates}}}, doi = {{10.1515/nanoph-2023-0556}}, year = {{2024}}, } @book{51129, editor = {{Herzig, Bardo and Eickelmann, Birgit and Schwabl, Franziska and Schulze, J. and Niemann, Jan}}, publisher = {{Waxmann Verlag GmbH}}, title = {{{Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven}}}, year = {{2024}}, } @misc{51133, abstract = {{In order to standardize spray flame synthesis (SFS) studies, intensive work has been done in recent years on the design of burner types. Thus, in 2019, the so-called SpraySyn1 burner was introduced (SS1), which was subsequently characterized in numerical and experimental studies. Based on this research, a modification of the nozzle design was proposed, which has now been considered in the successor model, SpraySyn2 (SS2). As little is known about the effect of the nozzle adaptation on the particle formation, we operated both burners under identical operating conditions to produce maghemite. The final powder comparison showed that SS2 yielded considerable higher specific surface areas (associated with smaller primary particle sizes), lower polydispersity, and higher phase purity. To obtain further information on the size distributions of aggregates and agglomerates generated by SS2, aerosol samples were extracted by hole in a tube (HIAT) sampling and characterized by scanning mobility particle sizing (SMPS). Samples were extracted along the centerline at different heights above the burner (HAB) above the visible flame tip (>7 cm), and quenching experiments were performed to extract the aerosol samples at different dilution rates. Thereby, it was demonstrated that performing detailed quenching experiments is crucial for obtaining representative HIAT-SMPS data. In particular, agglomerates/aggregate sizes were overestimated by up to ~70 % if samples were not sufficiently diluted. If sufficient dilution was applied, distribution widths and mean particle mobility diameters were determined with high accuracy (sample standard derivation <5 %). Our data suggested the evolution of primary particle sizes was mostly completed <7 cm HAB and it was shown aggregates/agglomerates present above the visible flame were compact in structure (non- fractal). The mean diameter of the particle ensemble grew along the centerline from 6.9 nm (7 cm) to 11.4 nm (15 cm), while distribution widths grew from 1.42 to 1.52.}}, booktitle = {{Applications in Energy and Combustion Science}}, editor = {{Tischendorf, Ricardo and Massopo, Orlando and Schmid, Hans-Joachim and Pyrmak, Olek and Dupont, Sophie and Fröde, Fabian and Pitsch, Heinz and Kneer, Reinhold}}, keywords = {{Flame Spray Pyrolysis, SpraySyn2, Spray flame synthesis, Maghemite nanoparticles, Gas to particle-conversion, Hole in a tube sampling}}, publisher = {{Elsevier}}, title = {{{Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS)}}}, doi = {{https://doi.org/10.1016/j.jaecs.2023.100235}}, year = {{2024}}, } @article{51156, abstract = {{Ferroelectric domain wall (DW) conductivity (DWC) can be attributed to two separate mechanisms: (a) the injection/ejection of charge carriers across the Schottky barrier formed at the (metal-)electrode-DW junction and (b) the transport of those charge carriers along the DW. Current-voltage (I-U) characteristics, recorded at variable temperatures from LiNbO3 (LNO) DWs, are clearly able to differentiate between these two contributions. Practically, they allow us to directly quantify the physical parameters relevant to the two mechanisms (a) and (b) mentioned above. These are, for example, the resistance of the DW, the saturation current, the ideality factor, and the Schottky barrier height of the electrode-DW junction. Furthermore, the activation energies needed to initiate the thermally activated electronic transport along the DWs can be extracted. In addition, we show that electronic transport along LNO DWs can be elegantly viewed and interpreted in an adapted semiconductor picture based on a double-diode, double-resistor equivalent-circuit model, the R2D2 model. Finally, our R2D2 model was checked for its universality by successfully fitting the I-U curves of not only z-cut LNO bulk DWs, but equally of z-cut thin-film LNO DWs, and of x-cut thin-film DWs as reported in literature.}}, author = {{Zahn, Manuel and Beyreuther, Elke and Kiseleva, Iuliia and Lotfy, Ahmed Samir and McCluskey, Conor J. and Maguire, Jesi R. and Suna, Ahmet and Rüsing, Michael and Gregg, J. Marty and Eng, Lukas M.}}, issn = {{2331-7019}}, journal = {{Physical Review Applied}}, keywords = {{General Physics and Astronomy}}, number = {{2}}, publisher = {{American Physical Society (APS)}}, title = {{{Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium }}}, doi = {{10.1103/physrevapplied.21.024007}}, volume = {{21}}, year = {{2024}}, } @unpublished{51160, abstract = {{We rigorously derive novel and sharp finite-data error bounds for highly sample-efficient Extended Dynamic Mode Decomposition (EDMD) for both i.i.d. and ergodic sampling. In particular, we show all results in a very general setting removing most of the typically imposed assumptions such that, among others, discrete- and continuous-time stochastic processes as well as nonlinear partial differential equations are contained in the considered system class. Besides showing an exponential rate for i.i.d. sampling, we prove, to the best of our knowledge, the first superlinear convergence rates for ergodic sampling of deterministic systems. We verify sharpness of the derived error bounds by conducting numerical simulations for highly-complex applications from molecular dynamics and chaotic flame propagation.}}, author = {{Philipp, Friedrich M. and Schaller, Manuel and Boshoff, Septimus and Peitz, Sebastian and Nüske, Feliks and Worthmann, Karl}}, booktitle = {{arXiv:2402.02494}}, title = {{{Extended Dynamic Mode Decomposition: Sharp bounds on the sample efficiency}}}, year = {{2024}}, } @inbook{50073, author = {{Hartung, Olaf}}, booktitle = {{Geschichtskulturen im digitalen Wandel?}}, editor = {{Hartung, Olaf and Krebs, Alexandra and Meyer-Hamme, Johannes}}, isbn = {{978-3-7344-1629-3}}, issn = {{1435-7658}}, pages = {{152--155}}, publisher = {{Wochenschau Verlag}}, title = {{{Historisches Lernen in einer ‚(Geschichts-)Kultur der Digitalität‘?}}}, year = {{2024}}, } @book{48576, editor = {{Hartung, Olaf}}, isbn = {{978-3-7344-1629-3}}, issn = {{1435-7658}}, pages = {{352}}, publisher = {{Wochenschau Verlag}}, title = {{{Geschichtskulturen im digitalen Wandel?}}}, year = {{2024}}, } @misc{49713, author = {{Elit, Stefan}}, booktitle = {{ZfdPh}}, number = {{4}}, publisher = {{ESV}}, title = {{{Handbuch Poetikvorlesungen. Geschichte – Praktiken – Poetiken, hg. v. Gundela Hachmann, Julia Schöll u. Johanna Bohley, Berlin/Boston 2022}}}, volume = {{143}}, year = {{2024}}, } @article{51221, abstract = {{Charge transfer mechanism in the deprotonation-induced n-type doping of PCBM.}}, author = {{Dong, Chuan-Ding and Bauch, Fabian and Hu, Yuanyuan and Schumacher, Stefan}}, issn = {{1463-9076}}, journal = {{Physical Chemistry Chemical Physics}}, keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}}, number = {{5}}, pages = {{4194--4199}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Charge transfer in superbase n-type doping of PCBM induced by deprotonation}}}, doi = {{10.1039/d3cp05105f}}, volume = {{26}}, year = {{2024}}, } @inbook{48943, author = {{Treder, Alexandra}}, booktitle = {{Memorias del III Congreso Internacional de Lenguas, Lingüística y Traducción}}, editor = {{Cuéllar Valcárcel, María de Lourdes and Gerena Meléndez, Alicia Alexesteva and Gil Carillo, Ittay Osiris}}, location = {{Mexico City [Mexico]}}, publisher = {{Department of Applied Linguistics, UNAM}}, title = {{{Concepciones de cultura y de encuentros interculturales de futuros/as profesores/as de Alemán como Lengua Extranjera}}}, year = {{2024}}, } @article{51208, abstract = {{AbstractApproximation of subdifferentials is one of the main tasks when computing descent directions for nonsmooth optimization problems. In this article, we propose a bisection method for weakly lower semismooth functions which is able to compute new subgradients that improve a given approximation in case a direction with insufficient descent was computed. Combined with a recently proposed deterministic gradient sampling approach, this yields a deterministic and provably convergent way to approximate subdifferentials for computing descent directions.}}, author = {{Gebken, Bennet}}, issn = {{0926-6003}}, journal = {{Computational Optimization and Applications}}, keywords = {{Applied Mathematics, Computational Mathematics, Control and Optimization}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{A note on the convergence of deterministic gradient sampling in nonsmooth optimization}}}, doi = {{10.1007/s10589-024-00552-0}}, year = {{2024}}, } @book{40014, editor = {{Blumberg, Eva and Niederhaus, Constanze and Mischendahl, Anne}}, publisher = {{Kohlhammer}}, title = {{{Mehrsprachigkeit in der Schule. Sprachbildung im und durch Sachunterricht.}}}, year = {{2024}}, } @unpublished{51204, abstract = {{Given a real semisimple connected Lie group $G$ and a discrete torsion-free subgroup $\Gamma < G$ we prove a precise connection between growth rates of the group $\Gamma$, polyhedral bounds on the joint spectrum of the ring of invariant differential operators, and the decay of matrix coefficients. In particular, this allows us to completely characterize temperedness of $L^2(\Gamma\backslash G)$ in this general setting.}}, author = {{Lutsko, Christopher and Weich, Tobias and Wolf, Lasse Lennart}}, booktitle = {{arXiv:2402.02530}}, title = {{{Polyhedral bounds on the joint spectrum and temperedness of locally symmetric spaces}}}, year = {{2024}}, } @misc{17740, author = {{Peckhaus, Volker}}, booktitle = {{The Stanford Encyclopedia of Philosophy, first published Sep 4, 2009, substantive revision Feb 2, 2024}}, editor = {{Zalta, Edward N.. and Nodelman, Uri}}, title = {{{Leibniz’s Influence on 19th Century Logic}}}, year = {{2024}}, } @misc{51301, author = {{Schmidt, Rebecca}}, booktitle = {{SozMethode}}, title = {{{Automatische Transkriptionssoftware – ein Erfahrungsbericht. }}}, year = {{2024}}, } @article{51339, author = {{Babai-Hemati, Jonas and vom Bruch, Felix and Herrmann, Harald and Silberhorn, Christine}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{Atomic and Molecular Physics, and Optics}}, publisher = {{Optica Publishing Group}}, title = {{{Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters}}}, doi = {{10.1364/oe.510319}}, year = {{2024}}, } @article{51270, abstract = {{This study investigates the teaching methods that future teachers of German as a foreign language use in cultural mediation. Utilizing a qualitative and hermeneutic approach, it analyzes data from a teacher-training module of the International Master's in German as a Foreign/Second Language that Friedrich Schiller University Jena in Germany offers. Participants taught an online course to students from a Japanese university, which focused on cultural learning. Within the teacher training module, the participants discussed their lesson plans, conducted classes, and subsequently reflected on their teaching practices by exploring and critiquing the practical application of their teaching skills. The analysis, which was conducted using qualitative evaluative content analysis following Kuckartz's (2018) approach, revealed a preference for distributive/instructive methods, with some recognition of interactive and collaborative methods. A tendency towards both repetitive and reflective practices was evident, with a predominant focus on content that was specific to a supposed target culture rather than intercultural or transcultural content. The study highlights the need to balance knowledge transmission with the development of critical and reflective skills in cultural mediation. It emphasizes the importance of incorporating collaborative and interactive methods, which promote a critical attitude that is necessary in language teachers and learners. In conclusion, this study advocates adaptive and reflective teaching as an essential component in the training of future language teachers in globalized contexts.}}, author = {{Treder, Alexandra}}, journal = {{Revista Lengua y Cultura}}, keywords = {{cultural mediation, teacher training, foreign language teaching, teaching methods, teaching practice}}, publisher = {{Universidad Autónoma del Estado de Hidalgo, Mexico}}, title = {{{Métodos de la mediación de cultura en el entrenamiento práctico de futuros/as profesores/as de Alemán como Lengua Extranjera}}}, year = {{2024}}, } @article{51363, author = {{Huybrechts, Yves and Schmitz, Sabine}}, issn = {{2211-2898}}, journal = {{bmgn — Low Countries Historical Review}}, publisher = {{Royal Netherlands Historical Society}}, title = {{{Het verhaal van Vlaanderen. Analyse van het mediaformat en het geschiedverhaal}}}, doi = {{10.51769/bmgn-lchr.15333}}, year = {{2024}}, } @article{51374, author = {{Hasler, David and Hinrichs, Benjamin and Siebert, Oliver}}, issn = {{0022-1236}}, journal = {{Journal of Functional Analysis}}, keywords = {{Analysis}}, number = {{7}}, publisher = {{Elsevier BV}}, title = {{{Non-Fock ground states in the translation-invariant Nelson model revisited non-perturbatively}}}, doi = {{10.1016/j.jfa.2024.110319}}, volume = {{286}}, year = {{2024}}, } @article{32101, author = {{Weich, Tobias and Guedes Bonthonneau, Yannick and Guillarmou, Colin and Hilgert, Joachim}}, journal = {{J. Europ. Math. Soc.}}, pages = {{1--36}}, title = {{{Ruelle-Taylor resonaces of Anosov actions}}}, year = {{2024}}, } @unpublished{51501, author = {{Hilgert, Joachim}}, title = {{{Quantum-Classical Correspondences for Locally Symmetric Spaces}}}, year = {{2024}}, } @article{51519, author = {{Cui, Tie Jun and Zhang, Shuang and Alu, Andrea and Wegener, Martin and Pendry, John and Luo, Jie and Lai, Yun and Wang, Zuojia and Lin, Xiao and Chen, Hongsheng and Chen, Ping and Wu, Rui-Xin and Yin, Yuhang and Zhao, Pengfei and Chen, Huanyang and Li, Yue and Zhou, Ziheng and Engheta, Nader and Asadchy, V. S. and Simovski, Constantin and Tretyakov, Sergei A and Yang, Biao and Campbell, Sawyer D. and Hao, Yang and Werner, Douglas H and Sun, Shulin and Zhou, Lei and Xu, Su and Sun, Hong-Bo and Zhou, Zhou and Li, Zile and Zheng, Guoxing and Chen, Xianzhong and Li, Tao and Zhu, Shi-Ning and Zhou, Junxiao and Zhao, Junxiang and Liu, Zhaowei and Zhang, Yuchao and Zhang, Qiming and Gu, Min and Xiao, Shumin and Liu, Yongmin and Zhang, Xiaoyu and Tang, Yutao and Li, Guixin and Zentgraf, Thomas and Koshelev, Kirill and Kivshar, Yuri S. and Li, Xin and Badloe, Trevon and Huang, Lingling and Rho, Junsuk and Wang, Shuming and Tsai, Din Ping and Bykov, A. Yu. and Krasavin, Alexey V and Zayats, Anatoly V and McDonnell, Cormac and Ellenbogen, Tal and Luo, Xiangang and Pu, Mingbo and Garcia-Vidal, Francisco J and Liu, Liangliang and Li, Zhuo and Tang, Wenxuan and Ma, Hui Feng and Zhang, Jingjing and Luo, Yu and Zhang, Xuanru and Zhang, Hao Chi and He, Pei Hang and Zhang, Le Peng and Wan, Xiang and Wu, Haotian and Liu, Shuo and Jiang, Wei Xiang and Zhang, Xin Ge and Qiu, Chengwei and Ma, Qian and Liu, Che and Li, Long and Han, Jiaqi and Li, Lianlin and Cotrufo, Michele and Caloz, Christophe and Deck-Léger, Z.-L. and Bahrami, A. and Céspedes, O. and Galiffi, Emanuele and Huidobro, P. A. and Cheng, Qiang and Dai, Jun Yan and Ke, Jun Cheng and Zhang, Lei and Galdi, Vincenzo and Di Renzo, Marco}}, issn = {{2515-7647}}, journal = {{Journal of Physics: Photonics}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}}, publisher = {{IOP Publishing}}, title = {{{Roadmap on electromagnetic metamaterials and metasurfaces}}}, doi = {{10.1088/2515-7647/ad1a3b}}, year = {{2024}}, } @misc{50816, author = {{Hücker, Lars}}, title = {{{Stickstoff basierte Flammschutzmittel für das Lasersintern: Optimierung und Analyse der Recyclingfähigkeit (Studienarbeit)}}}, year = {{2024}}, } @misc{50815, author = {{Schulz, Maurice}}, title = {{{Phosphorhaltige Lasersinter-Materialien mit Flammschutzwirkung: Optimierung und Analyse der Recyclingfähigkeit (Studienarbeit)}}}, year = {{2024}}, } @inbook{50812, author = {{Degeling, Jasmin and Haffke, Maren}}, booktitle = {{digital:gender - de:mapping affect. Eine spekulative Kartographie}}, editor = {{Bee, Julia and Gradinari, Irina and Köppert , Katrin}}, publisher = {{Spector}}, title = {{{Sorgeprakiken der Online-Rechten – Jordan Petersons Therapeutik des ,Self-Authoring'}}}, year = {{2024}}, } @article{46019, abstract = {{We derive efficient algorithms to compute weakly Pareto optimal solutions for smooth, convex and unconstrained multiobjective optimization problems in general Hilbert spaces. To this end, we define a novel inertial gradient-like dynamical system in the multiobjective setting, which trajectories converge weakly to Pareto optimal solutions. Discretization of this system yields an inertial multiobjective algorithm which generates sequences that converge weakly to Pareto optimal solutions. We employ Nesterov acceleration to define an algorithm with an improved convergence rate compared to the plain multiobjective steepest descent method (Algorithm 1). A further improvement in terms of efficiency is achieved by avoiding the solution of a quadratic subproblem to compute a common step direction for all objective functions, which is usually required in first-order methods. Using a different discretization of our inertial gradient-like dynamical system, we obtain an accelerated multiobjective gradient method that does not require the solution of a subproblem in each step (Algorithm 2). While this algorithm does not converge in general, it yields good results on test problems while being faster than standard steepest descent.}}, author = {{Sonntag, Konstantin and Peitz, Sebastian}}, journal = {{Journal of Optimization Theory and Applications}}, publisher = {{Springer}}, title = {{{Fast Multiobjective Gradient Methods with Nesterov Acceleration via Inertial Gradient-Like Systems}}}, doi = {{10.1007/s10957-024-02389-3}}, year = {{2024}}, } @unpublished{51334, abstract = {{The efficient optimization method for locally Lipschitz continuous multiobjective optimization problems from [1] is extended from finite-dimensional problems to general Hilbert spaces. The method iteratively computes Pareto critical points, where in each iteration, an approximation of the subdifferential is computed in an efficient manner and then used to compute a common descent direction for all objective functions. To prove convergence, we present some new optimality results for nonsmooth multiobjective optimization problems in Hilbert spaces. Using these, we can show that every accumulation point of the sequence generated by our algorithm is Pareto critical under common assumptions. Computational efficiency for finding Pareto critical points is numerically demonstrated for multiobjective optimal control of an obstacle problem.}}, author = {{Sonntag, Konstantin and Gebken, Bennet and Müller, Georg and Peitz, Sebastian and Volkwein, Stefan}}, booktitle = {{arXiv:2402.06376}}, title = {{{A Descent Method for Nonsmooth Multiobjective Optimization in Hilbert Spaces}}}, year = {{2024}}, } @misc{51724, author = {{Bablitzka, Nico Janosch and Beimdiek, Janis}}, title = {{{Einfluss von Temperatur und Strömungsführung auf die NH3-SCO sowie die NH3-SCR mit Partikeln aus einer Sprayflammensynthese}}}, year = {{2024}}, } @unpublished{51731, abstract = {{Estimating the infection risks in indoor environments comprises the assessment of the behavior of virus-laden aerosols, i.e. spreading, mixing, removal by air purifiers etc. A promising experimental approach is based on using non-hazardous surrogate aerosols of similar size, e.g. salt particles, to mimic the virus aerosol behavior. This manuscript addresses the issue how a successful transfer of such experiments can be accomplished. Corresponding experiments in two very different environments, a large community hall and a seminar room, with optional use of air purifiers in various constellations were conducted. While high particle concentrations are advantageous in terms of avoiding influence of background aerosol concentrations, it is shown that appropriate consideration of aggregation and settling are vital to theoretically describe the experimentally determined course of particle concentrations. A corresponding model equation for a well-mixed situation is derived and the required parameters are thoroughly determined in separate experiments independently. It is demonstrated that clean air delivery rates (CADR) of air purifiers determined with this approach may differ substantially from common approaches not explicitly taking into account aggregation. }}, author = {{Beimdiek, Janis and Schmid, Hans-Joachim}}, booktitle = {{Atmosphere}}, keywords = {{surrogate aerosols, indoor air cleaners, ultra-fine particles, COVID-19, test method, field experiments: clean air delivery rate}}, publisher = {{MDPI}}, title = {{{Evaluation of Surrogate Aerosol Experiments to Predict Spreading and Removal of Virus-Laden Aerosols}}}, year = {{2024}}, } @phdthesis{51732, author = {{Richters, Maximilian}}, title = {{{Herstellung und Charakterisierung von Wood-Plastic-Composites (WPC) mit einer Matrix aus thermoplastischen Polyurethanen zur Erzeugung einer Holz-WPC-Verbundstruktur }}}, year = {{2024}}, } @article{51737, author = {{Kullmer, Gunter and Weiß, Deborah and Schramm, Britta}}, issn = {{0013-7944}}, journal = {{Engineering Fracture Mechanics}}, keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}}, publisher = {{Elsevier BV}}, title = {{{An alternative and robust formulation of the fatigue crack growth rate curve for long cracks}}}, doi = {{10.1016/j.engfracmech.2023.109826}}, volume = {{296}}, year = {{2024}}, } @inbook{51745, author = {{Schulz, Christian}}, booktitle = {{Digitale Schriftlichkeit – Progammieren, Prozessieren und Codieren von Schrift}}, editor = {{Bartelmus, Martin and Nebrig, Alexander}}, publisher = {{transcript }}, title = {{{Vernakulärer Code oder die Geister, die der Algorithmus rief - digitale Schriftlichkeit im Kontext von sozialen Medienplattformen}}}, year = {{2024}}, } @inbook{51748, author = {{Schulz, Christian}}, booktitle = {{Populäre Artikulationen – Artikulationen des Populären}}, editor = {{Koch, Günter and Rottgeri , André }}, publisher = {{Schüren}}, title = {{{In Likes We Trust oder die unmögliche Möglichkeit vom Like als Gabe zu sprechen}}}, year = {{2024}}, } @inbook{51746, author = {{Schulz, Christian}}, booktitle = {{Die Fotografie und ihre Institutionen. Von der Lehrsammlung zum Bundesinstitut }}, editor = {{Schürmann, Anja and Yacavone, Kathrin }}, publisher = {{Reimer Verlag}}, title = {{{Vom foto-sozialen Graph zum Story-Format: Über die Institutionalisierung sozialmedialer Infrastruktur aus dem Geiste der Fotografie}}}, year = {{2024}}, } @inbook{51747, author = {{de Gruisbourne, Birte and Schulz, Christian}}, booktitle = {{Inquiring healing across screen cultures: Recuperating narratives, mediums, and creativities}}, editor = {{Çiçek, Özgür and Savaş, Özlem}}, publisher = {{Routledge}}, title = {{{A Healing Media System of Care - Cancer Diaries and Social Media}}}, year = {{2024}}, } @book{51764, editor = {{Adelmann, Ralf and Matzner, Tobias and Miggelbrink, Monique and Schulz, Christian }}, publisher = {{MediaRep}}, title = {{{Filter – Medienwissenschaftliche Symposien der DFG}}}, year = {{2024}}, } @inbook{51790, author = {{Richter, Susanne}}, booktitle = {{Inklusiver Kinderschutz – Anforderungen, Herausforderungen, Perspektiven}}, editor = {{Kieslinger, Daniel and Owsianowski, Judith}}, isbn = {{978-3-7841-3666-0}}, publisher = {{Lambertus}}, title = {{{Herausforderungen in der inklusiven Mädchenarbeit: Begleitforschung der „Inklusiven anonymen Zuflucht“ des Mädchenhaus Bielefeld e.V.}}}, year = {{2024}}, } @article{40171, abstract = {{We present a convolutional framework which significantly reduces the complexity and thus, the computational effort for distributed reinforcement learning control of dynamical systems governed by partial differential equations (PDEs). Exploiting translational equivariances, the high-dimensional distributed control problem can be transformed into a multi-agent control problem with many identical, uncoupled agents. Furthermore, using the fact that information is transported with finite velocity in many cases, the dimension of the agents’ environment can be drastically reduced using a convolution operation over the state space of the PDE, by which we effectively tackle the curse of dimensionality otherwise present in deep reinforcement learning. In this setting, the complexity can be flexibly adjusted via the kernel width or by using a stride greater than one (meaning that we do not place an actuator at each sensor location). Moreover, scaling from smaller to larger domains – or the transfer between different domains – becomes a straightforward task requiring little effort. We demonstrate the performance of the proposed framework using several PDE examples with increasing complexity, where stabilization is achieved by training a low-dimensional deep deterministic policy gradient agent using minimal computing resources.}}, author = {{Peitz, Sebastian and Stenner, Jan and Chidananda, Vikas and Wallscheid, Oliver and Brunton, Steven L. and Taira, Kunihiko}}, journal = {{Physica D: Nonlinear Phenomena}}, pages = {{134096}}, publisher = {{Elsevier}}, title = {{{Distributed Control of Partial Differential Equations Using Convolutional Reinforcement Learning}}}, doi = {{10.1016/j.physd.2024.134096}}, volume = {{461}}, year = {{2024}}, } @article{51841, abstract = {{athematische Kompetenzen digital zu fördern und digitale Kompetenzen mathematisch zu fördern – dies ist eine Forderung der neuen Bildungsstandards mit Blick auf eine Bildung in der digitalen Welt. Gerade das Potenzial digitaler Medien für das fachliche Lernen wurde in vielen Studien bestätigt. Eine sinnvoll gestaltete Einbettung digitaler Medien bietet die Chance, allen fünf Prinzipien eines guten Unterrichts gerecht zu werden: Verstehensorientierung, Durchgängigkeit, kognitive Aktivierung, Lernendenorientierung & Adaptivität und Kommunikationsförderung. Die flächendeckende Nutzung digitaler Medien etabliert sich bislang nur zögerlich. Aber wie können wir Lehrkräfte stärken, digitale Medien sinnvoll einzusetzen? Wir möchten hier die Bandbreite der Möglichkeiten an Beispielen verdeutlichen, ihren Einsatz motivieren und Wege für einen guten Unterricht aufzeigen.}}, author = {{Barzel, Bärbel and Greefrath, Gilbert and Nagel, Mareike and Hoffmann, Max}}, journal = {{mathematik lehren}}, pages = {{42 -- 47}}, title = {{{Digitalisierung als Chance für alle Prinzipien guten Unterrichts}}}, volume = {{242}}, year = {{2024}}, } @article{51843, author = {{Büker, Petra and Höke, Julia}}, journal = {{Grundschule aktuell}}, pages = {{12--15}}, title = {{{Reflexion im Dialog. Ein Modell für eine Kinder, Eltern, Teams und Schule stärkende Bildungsdokumentation }}}, volume = {{165}}, year = {{2024}}, } @inbook{52087, author = {{Meier, Jana and Vogelsang, Christoph and Rotärmel, Tanja}}, booktitle = {{Das Berufsfeldpraktikum als Professionalisierungselement - Grundlagen, Konzepte, Beispiele für das Lehramtsstudium}}, editor = {{Schöning, Anke and Heer, Michaela and Pahl, Michelle and Diehr, Frank and Parusel, Eva and Tinnefeld, Anja and Walke, Jutta}}, pages = {{310--324}}, publisher = {{Verlag Julius Klinkhardt}}, title = {{{"Das Berufsfeldpraktikum empfinde ich als nicht notwendig im Studium" - Evaluationsergebnisse zum Berufsfeldpraktikum aus Sicht von Lehramtsstudierenden}}}, doi = {{10.35468/6068}}, year = {{2024}}, } @inbook{52088, author = {{Vogelsang, Christoph and Meier, Jana}}, booktitle = {{Das Berufsfeldpraktikum als Professionalisierungselement - Grundlagen, Konzepte, Beispiele für das Lehramtsstudium}}, editor = {{Schöning, Anke and Heer, Michaela and Pahl, Michelle and Diehr, Frank and Parusel, Eva and Tinnefeld, Anja and Walke, Jutta}}, pages = {{277--293}}, publisher = {{Verlag Julius Klinkhardt}}, title = {{{Sinnvolle Ergänzung oder bewusster Bruch? - Tätigkeitsfelder im Berufsfeldpraktikum innerhalb des Lehramtsstudiums}}}, doi = {{10.35468/6068}}, year = {{2024}}, } @inbook{51099, author = {{Welsandt, N.J. and Huschle, L. and Drossel, Kerstin and Deimel, D. and Abs, H.J.}}, booktitle = {{ICCS 2022. Schulische Sozialisation und politische Bildung von 14-Jährigen im internationalen Vergleich}}, editor = {{Abs, H.J. and Hahn-Laudenberg, K. and Deimel, D. and Ziemes, J.F.}}, pages = {{239--276}}, publisher = {{Waxmann Verlag GmbH}}, title = {{{Mediennutzung von Jugendlichen zu sozialen und politischen Fragen, schulische Aktivitäten und Lehrkräftefortbildungen}}}, year = {{2024}}, } @article{52090, author = {{Zietlow, Christian and Lindner, Jörg}}, journal = {{Numerical Algorithms}}, title = {{{ADMM-TGV image restoration for scientific applications with unbiased parameter choice}}}, doi = {{10.1007/s11075-024-01759-2}}, year = {{2024}}, } @article{52096, author = {{Kamp, Hermann}}, journal = {{Zeitschrift des Aachener Geschichtsvereins }}, pages = {{137--167}}, publisher = {{VERLAGSDRUCKEREI SCHMIDT GMBH}}, title = {{{Zwischen Beutesuche und politischen Ambitionen. Die Normannen an Rhein und Maas zwischen 880 und 89}}}, volume = {{123/124 2021-2022}}, year = {{2024}}, } @article{52092, author = {{Stumpe, Miriam}}, issn = {{2352-1465}}, journal = {{Transportation Research Procedia}}, pages = {{402--409}}, publisher = {{Elsevier BV}}, title = {{{A new mathematical formulation for the simultaneous optimization of charging infrastructure and vehicle schedules for electric bus systems}}}, doi = {{10.1016/j.trpro.2024.02.051}}, volume = {{78}}, year = {{2024}}, } @misc{50728, author = {{Riedl, Lars}}, booktitle = {{Kölner Zeitschrift für Soziologie und Sozialpsychologie}}, isbn = {{978-3-8376-6682}}, title = {{{Soziologie des Flitzers}}}, doi = {{10.1007/s11577-023-00928-w}}, year = {{2024}}, } @article{37024, author = {{Knoll, Lisa and Fraser, Alec}}, journal = {{Economy and Society}}, title = {{{Social Impact Bond assetization struggles: A comparative case study of the United Kingdom and Germany}}}, doi = {{https://doi.org/10.1080/03085147.2024.2309802}}, year = {{2024}}, } @article{52201, author = {{Han, Daxin and Kappe, Fabian and Vorderbrüggen, Julian and Jendrny, Jörg and Gorr, Eugen and Meschut, Gerson}}, issn = {{1526-6125}}, journal = {{Journal of Manufacturing Processes}}, keywords = {{Industrial and Manufacturing Engineering, Management Science and Operations Research, Strategy and Management}}, pages = {{92--108}}, publisher = {{Elsevier BV}}, title = {{{Single-step self-punching lockbolt process for aluminum sheets without pre-hole}}}, doi = {{10.1016/j.jmapro.2024.02.043}}, volume = {{116}}, year = {{2024}}, } @article{52202, author = {{Lammert, Olesja and Richter, Birte and Schütze, Christian and Thommes, Kirsten and Wrede, Britta}}, journal = {{Frontiers in Behavioral Economics}}, title = {{{Humans in XAI: Increased Reliance in Decision-Making Under Uncertainty by Using Explanation Strategies}}}, doi = {{10.3389/frbhe.2024.1377075}}, year = {{2024}}, } @article{52206, author = {{Seutter, Janina and Müller, Michelle and Müller, Stefanie Jutta Marianne and Kundisch, Dennis}}, journal = {{Internet Research}}, title = {{{Moment or movement – the heterogeneous impact of the Black Lives Matter movement on personal and societal charitable crowdfunding campaigns}}}, year = {{2024}}, } @inproceedings{52213, author = {{Beule, Felix and Sander, Sascha and Meschut, Gerson and Damm, Jannis and Kasper, Yann and Albiez, Matthias and Kötz, Fabian and Matzenmiller, Anton}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Methodenentwicklung zur rechnerischen Auslegung geklebter Stahlverbindungen unter Alterungsbeanspruchung im Stahl- und Anlagenbau}}}, year = {{2024}}, } @inproceedings{52211, author = {{Beule, Felix and Teutenberg, Dominik and Meschut, Gerson}}, booktitle = {{DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen}}, location = {{Köln}}, title = {{{Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash}}}, year = {{2024}}, } @inproceedings{52214, author = {{Beule, Felix and Teutenberg, Dominik and Meschut, Gerson and Schmelzle, Lars and Possart, Gunnar and Mergheim, Julia and Steinmann, Paul}}, location = {{Köln}}, title = {{{Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung}}}, year = {{2024}}, } @article{52217, abstract = {{AbstractPolycarbonate (PC) is an amorphous polymer that is an extremely robust material with a high tenacity, and thus suitable for a lightweight construction with glass‐like transparency. Due to these advantageous properties, PC is often used in industry for example in medical devices, automotive headlamps, sporting equipment, electronics, and a variety of other products. PC is often subjected to uniaxial and biaxial loading conditions. Therefore, reliable material models have to take into account the various resulting experimental effects. For those reasons, we investigate PC specimens under uniaxial and biaxial loading by using different stretch rates and loading scenarios. In addition to that, we propose methods for optical measurement of local stretches to obtain the approximated local true stress. In future work, the displacement fields and the resulting reaction forces will be used for parameter identification of constitutive equations.}}, author = {{Hamdoun, Ayoub and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics}}, publisher = {{Wiley}}, title = {{{Experimental investigations of uniaxial and biaxial cold stretching within PC‐films and bars using optical measurements}}}, doi = {{10.1002/pamm.202300114}}, year = {{2024}}, } @article{52218, author = {{Lenz, Peter and Mahnken, Rolf}}, issn = {{0020-7683}}, journal = {{International Journal of Solids and Structures}}, keywords = {{Applied Mathematics, Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science, Modeling and Simulation}}, publisher = {{Elsevier BV}}, title = {{{Multiscale simulation of polymer curing of composites combined mean-field homogenisation methods at large strains}}}, doi = {{10.1016/j.ijsolstr.2023.112642}}, volume = {{290}}, year = {{2024}}, } @inproceedings{52215, author = {{Carillo Beber, Vinicius and Fernandes, Pedro and Nagel, Christof and Köster, Christian and Matzenmiller, Anton and Hecht, Mathias and Baumgartner, Jörg and Melz, Tobias and Tews, Karina and Çavdar, Serkan and Meschut, Gerson}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden}}}, year = {{2024}}, } @inproceedings{52212, author = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson and Buczek, Moritz and Duffe, Tobias and Kullmer, Gunter}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Bruchmechanisches Schnittebenenkonzept zur lebensdauergerechten Auslegung von hyperelastischen Klebverbindungen bei multiaxialen und variablen Belastungsamplituden}}}, year = {{2024}}, } @inproceedings{52216, author = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson}}, location = {{Köln}}, title = {{{Mechanisches Verhalten: Charakterisierung von Klebstoffen}}}, year = {{2024}}, } @inbook{52252, author = {{Tophinke, Doris and Dübbert, Alexander}}, booktitle = {{Konstruktionsgrammatik X. Textsorten und Textmuster als Konstruktionen?}}, editor = {{Stumpf, Sören and Stein, Stephan}}, isbn = {{978-3-95809-171-9}}, pages = {{89--112}}, publisher = {{Stauffenburg}}, title = {{{„4 THe BoYZ“ – Widmungen im Szene-Graffiti aus konstruktionsgrammatischer Perspektive. Die multimodale Relator-Konstruktion als grammatische Musterbildung im Horizont des Textes}}}, year = {{2024}}, } @inbook{51130, author = {{Eickelmann, Birgit and Barbovschi, M. and Holmarsdottir, H.B. and Parsanoglou, D. and Sisask, M. and Labusch, Amelie}}, booktitle = {{Understanding the everyday digital lives of children and young people}}, editor = {{Holmarsdottir, H.B. and Seland, I. and Hyggen, C. and Roth, M.}}, publisher = {{Palgrave Macmillan}}, title = {{{Perspectives of children and young people on their education as preparing for their future in the digital age: In-depth qualitative study in five European countries.}}}, doi = {{10.1007/978-3-031-46929-9}}, year = {{2024}}, } @misc{52318, author = {{Dorociak, Svitlana}}, title = {{{Implementierung eines Algorithmus zur motivbasierten Schnitt-Sparsifizierung}}}, year = {{2024}}, } @inproceedings{52235, abstract = {{Android applications collecting data from users must protect it according to the current legal frameworks. Such data protection has become even more important since the European Union rolled out the General Data Protection Regulation (GDPR). Since app developers are not legal experts, they find it difficult to write privacy-aware source code. Moreover, they have limited tool support to reason about data protection throughout their app development process. This paper motivates the need for a static analysis approach to diagnose and explain data protection in Android apps. The analysis will recognize personal data sources in the source code, and aims to further examine the data flow originating from these sources. App developers can then address key questions about data manipulation, derived data, and the presence of technical measures. Despite challenges, we explore to what extent one can realize this analysis through static taint analysis, a common method for identifying security vulnerabilities. This is a first step towards designing a tool-based approach that aids app developers and assessors in ensuring data protection in Android apps, based on automated static program analysis. }}, author = {{Khedkar, Mugdha and Bodden, Eric}}, booktitle = {{Proceedings of the 9th International Conference on Mobile Software Engineering and Systems}}, keywords = {{static program analysis, data protection and privacy, GDPR compliance}}, location = {{Lisbon, Portugal}}, title = {{{Toward an Android Static Analysis Approach for Data Protection}}}, year = {{2024}}, } @unpublished{52342, abstract = {{We introduce the concept of a k-token signed graph and study some of its combinatorial and algebraic properties. We prove that two switching isomorphic signed graphs have switching isomorphic token graphs. Moreover, we show that the Laplacian spectrum of a balanced signed graph is contained in the Laplacian spectra of its k-token signed graph. Besides, we introduce and study the unbalance level of a signed graph, which is a new parameter that measures how far a signed graph is from being balanced. Moreover, we study the relation between the frustration index and the unbalance level of signed graphs and their token signed graphs. }}, author = {{Dalfó, C. and Fiol, M. A. and Steffen, Eckhard}}, booktitle = {{arXiv:2403.02924}}, title = {{{On token signed graphs}}}, year = {{2024}}, } @article{52346, abstract = {{Promising cathode materials for fluoride-ion batteries (FIBs) are 3d transition metal containing oxides with Ruddlesden-Popper-type structure. So far, multi-elemental compositions were not investigated, but could alternate electrochemical performance similar to what has been found for cathode materials for lithium-ion batteries. Within this study, we investigate RP type La2Ni0.75Co0.25O4.08 as an intercalation-based active cathode material for all-solid-state FIBs. We determine the structural changes of La2Ni0.75Co0.25O4.08 during fluoride intercalation / de-intercalation by ex-situ X-ray diffraction, which showed that F- insertion leads to transformation of the parent phase to three different phases. Changes in Ni and Co oxidation states and coordination environment were examined by X-ray absorption spectroscopy and magnetic measurements in order to understand the complex reaction behaviour of the phases in detail, showing that the two transition metals behave differently in the charging and discharging process. Under optimized operating conditions, a cycle life of 120 cycles at a critical cut-off capacity of 40 mAh g-1 against Pb/PbF2 was obtained, which is one of the highest observed for intercalation electrode materials in FIBs so far. The average Coulombic efficiencies ranged from 85% to 90%. Thus, La2Ni0.75Co0.25O4.08 could be a promising candidate for cycling-stable high-energy cathode materials for all-solid-state FIBs}}, author = {{Vanita, Vanita and Waidha, Aamir Iqbal and Vasala, Sami and Puphal, Pascal and Schoch, Roland and Glatzel, Pieter and Bauer, Matthias and Clemens, Oliver}}, issn = {{2050-7488}}, journal = {{Journal of Materials Chemistry A}}, keywords = {{General Materials Science, Renewable Energy, Sustainability and the Environment, General Chemistry}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Insights into the First Multi-Transition-Metal Containing Ruddlesden Popper-Type Cathode for all-solid-state Fluoride Ion Batteries}}}, doi = {{10.1039/d4ta00704b}}, year = {{2024}}, } @article{52357, author = {{Beimdiek, Janis and Schmid, Hans-Joachim}}, issn = {{2073-4433}}, journal = {{Atmosphere}}, keywords = {{surrogate aerosols, indoor air cleaners, ultra-fine particles, COVID-19, test method, field experiments: clean air delivery rate}}, number = {{3}}, publisher = {{Multidisciplinary Digital Publishing Institute (MDPI)}}, title = {{{Evaluation of Surrogate Aerosol Experiments to Predict Spreading and Removal of Virus-Laden Aerosols}}}, doi = {{ 10.3390/atmos15030305}}, volume = {{15}}, year = {{2024}}, } @inproceedings{52359, author = {{Chudalla, Nick and Schmolke, Tobias and Meschut, Gerson and Spohr, Sebastian and Eckstein, Lutz and Brunner-Schwer, Christian and Rethmeier, Michael and Nothelfer-Richter, Rolf and Hilt, MIchael}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Konzeptentwicklung für ein Stahlbatteriegehäuse unter besonderer Berücksichtigung der Fügetechnik und des Korrosionsschutzes}}}, year = {{2024}}, } @article{52097, author = {{Hami Dindar, Iman and Mirzaei, Mona and Baumhögger, Elmar and Lutters, Nicole and Kenig, Eugeny Y.}}, issn = {{0021-9568}}, journal = {{Journal of Chemical & Engineering Data}}, keywords = {{General Chemical Engineering, General Chemistry}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Experimental and Theoretical Investigation of CO2 Absorption in Aqueous Solution of Glucosamine: Material Property and Equilibrium Data}}}, doi = {{10.1021/acs.jced.3c00554}}, year = {{2024}}, } @article{52226, author = {{Weber, Mike and Lutters, Nicole and Kenig, Eugeny Y.}}, issn = {{0888-5885}}, journal = {{Industrial & Engineering Chemistry Research}}, keywords = {{Industrial and Manufacturing Engineering, General Chemical Engineering, General Chemistry}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Dynamics of an Absorption/Desorption Plant: Experimental Study and Model Validation}}}, doi = {{10.1021/acs.iecr.3c03262}}, year = {{2024}}, } @phdthesis{52404, author = {{Flachmann, Felix}}, isbn = {{978-3-8440-9432-9}}, pages = {{140}}, publisher = {{Shaker Verlag}}, title = {{{Untersuchung des Füllverhaltens holzfaserverstärkter Kunststoffe (WPC) mit hohen Füllstoffgehalten}}}, volume = {{Band 4}}, year = {{2024}}, } @inproceedings{52403, author = {{Al Trjman, Mohamad and Meschut, Gerson and Salten, Alexander Heinrich Johannes and Kenig, Eugeny Y.}}, location = {{Köln}}, title = {{{Methodenentwicklung zur Simulation des Viscous Fingering in Klebverbindungen von stahlintensiven Mischbaustrukturen}}}, year = {{2024}}, } @article{52229, author = {{Bruns, Bastian and Gross, Michel and Grünewald, Marcus and Bertsch, Valentin and Riese, Julia}}, issn = {{0959-6526}}, journal = {{Journal of Cleaner Production}}, keywords = {{Industrial and Manufacturing Engineering, Strategy and Management, General Environmental Science, Renewable Energy, Sustainability and the Environment, Building and Construction}}, publisher = {{Elsevier BV}}, title = {{{A multi-step framework for the design of a flexible power-to-methane process}}}, doi = {{10.1016/j.jclepro.2024.141434}}, year = {{2024}}, } @article{52388, author = {{Riese, Julia and Fasel, Henrik and Pannok, Maik and Lier, Stefan}}, issn = {{2352-5509}}, journal = {{Sustainable Production and Consumption}}, keywords = {{Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment, Environmental Chemistry, Environmental Engineering}}, publisher = {{Elsevier BV}}, title = {{{Decentralized production concepts for bio-based polymers - implications for supply chains, costs, and the carbon footprint}}}, doi = {{10.1016/j.spc.2024.03.001}}, year = {{2024}}, } @misc{52529, author = {{Kraft, Kerstin}}, publisher = {{Kraft, Kerstin, et al. “A Short Introduction to the Film Glove and Touch Studies.” Fashion Studies, vol. 5, no. 1, 2024, pp. 1-11, https://www.fashionstudies.ca/introduction-to-glove-and-touch-studies/, https://doi.org/10.38055/FS050108.}}, title = {{{“A Short Introduction to the Film Glove and Touch Studies.”}}}, year = {{2024}}, } @inbook{52511, abstract = {{Sind „soziale Medien“ überhaupt ein Thema für die Geschichtswissenschaft? Ja, denn die längere Geschichte der Digitalisierung, in der die „sozialen Medien“ einzuordnen sind, zählt bereits über 80 Jahre. Konrad Zuse und andere Ingenieure entwickelten seit 1941 die ersten Digitalcomputer, Unternehmer*innen, Wissenschaftler*innen und Staatenlenker*innen setzten diese seit den 1950er Jahren für ihre Zwecke ein, die Zivilgesellschaft adaptierte sie in den darauffolgenden Dekaden – all das prägte die sozio-digitale Landschaft der späteren „sozialen Medien“. Als unmittelbar „nach dem Boom“ etwa um 1970 zahlreiche Industriegesellschaften einen strukturellen Wandel in Wirtschaft, Gesellschaft und Politik durchlebten, war eine Antwort darauf die vermehrte Digitalisierung und Vernetzung. Daraus entwickelte sich die 1990er Jahre als markante Dekade von World Wide Web, Google und Chatdiensten. Die Entwicklung der „sozialen Medien“ ist also unter anderem in eine ökonomische und gesellschaftliche Entwicklung der Aufmerksamkeitsökonomie und in die längeren Veränderungen von Wirtschafts- und Gesellschaftsordnungen der Ausdifferenzierung und partiellen Individualisierung seit den 1960er Jahren einzuordnen. Dadurch lässt sich besser verstehen, welche Prämissen ihnen zugrunde lagen, welche Möglichkeitsräume und Probleme sich daraus ergaben und warum sie die heutige Öffentlichkeit in einer bestimmten Art und Weise dominieren – ohne sie jedoch zu determinieren.}}, author = {{Schmitt, Martin}}, booktitle = {{Soziale Medien – wie sie wurden, was sie sind }}, keywords = {{Digitalgeschichte, Soziale Medien, Technikgeschichte, World Wide Web, Digitalisierung}}, publisher = {{Bundeszentrale für politische Bildung}}, title = {{{Die Vorgeschichte der „sozialen Medien“. Über die Träume digitaler Vergemeinschaftung und freier Kommunikation}}}, year = {{2024}}, } @inbook{52538, abstract = {{Twitter ist jetzt X und befindet sich auf dem absteigenden Ast. Auf diesem Ast sitzt Facebook bereits seit längerem. Der Kurzvideodienst Vine, Vorgänger von TikTok, ist Geschichte. Und auch bei Google klingeln die Alarmglocken angesichts der „neuen“ Konkurrenz durch Microsoft und ChatGPT. Umso dringlicher wird also die Historisierung der „sozialen Medien“, das heißt, sie in ihren historischen Kontext einzuordnen und ihren Mythos zu entzaubern. Dabei wartet das Vorhaben mit einer doppelten Herausforderung auf: Erstens, dass es sich bei den Unternehmen der Branche und zweitens auch bei den dort gebildeten Gemeinschaften um recht flüchtige, wandelhaften Gestalten handelt. Scheitern und Wandel ist Teil der „sozialen Medien“ – und sei es nur in der schnellen Abfolge der Moden des „nächsten großen Dings“. Dementsprechend versucht dieser Beitrag mit einem systematischeren Ansatz als dem der gesellschaftlichen Selbstbeschreibung, die Entwicklung des sozio-digitalen Phänomens „soziale Medien“ in dessen Zeitkontext einzuordnen.}}, author = {{Schmitt, Martin}}, booktitle = {{Soziale Medien – wie sie wurden, was sie sind}}, keywords = {{Digitalgeschichte, Soziale Medien, Technikgeschichte, Wirtschaftsgeschichte, Digitalisierung, Twitter, Facebook, Meta}}, publisher = {{Bundeszentrale für politische Bildung}}, title = {{{Alles geht? Die jüngste Geschichte der „sozialen Medien“. Zwischen Wirtschaft und Gemeinschaft}}}, year = {{2024}}, } @inproceedings{52537, author = {{Gröger, Benjamin and Wiebicke, Felix and Koch, Ilja and Gude, Maik and Gilich, Julian and Meschut, Gerson}}, booktitle = {{24. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Experimentelle und numerische Analyse des Fließverhaltens von hochviskosen Wärmeleitstoffen im Fertigungsprozess}}}, year = {{2024}}, } @article{52541, abstract = {{AbstractWe conducted an investigation into the palladium‐catalyzed carbon‐sulfur cross‐coupling reaction involving a 2‐bromothiophene derivative and potassium thioacetate as a substitute for hydrogen sulfide. This investigation utilized kinetic and computational methods. We synthesized two palladium complexes supported by the bisphosphane ligands bis(diphenylphosphino)ferrocene (DPPF) and bis(diisopropylphosphino)ferrocene (DiPPF), as well as their tentative intermediates in the catalytic cycle. Reaction rates were measured and then compared to computational predictions.}}, author = {{Peschtrich, Sebastian and Schoch, Roland and Kuckling, Dirk and Paradies, Jan}}, issn = {{1434-193X}}, journal = {{European Journal of Organic Chemistry}}, keywords = {{Organic Chemistry, Physical and Theoretical Chemistry}}, number = {{8}}, publisher = {{Wiley}}, title = {{{A Comparative Kinetic and Computational Investigation of the Carbon‐Sulfur Cross Coupling of Potassium Thioacetate and 2‐Bromo Thiophene Using Palladium/Bisphosphine Complexes}}}, doi = {{10.1002/ejoc.202301207}}, volume = {{27}}, year = {{2024}}, } @article{52572, abstract = {{A series of substituted ferrocenyl boron derivatives was synthesized. The oxidation of the ferrocenyl unit resulted in a significant increase of the boron‐centered Lewis acidity. The neutral and cationic Lewis acids were characterized by NMR‐spectroscopy, crystal structure analysis and by computational methods. The new Lewis acids were then applied in the Meinwald rearrangement of epoxides, predominantly furnishing aldehydes as the kinetic products.}}, author = {{Köring, Laura and Birenheide, Bernhard and Krämer, Felix and Wenzel, Jonas O. and Schoch, Roland and Brehm, Martin and Breher, Frank and Paradies, Jan}}, issn = {{1434-1948}}, journal = {{European Journal of Inorganic Chemistry}}, keywords = {{Inorganic Chemistry}}, publisher = {{Wiley}}, title = {{{Synthesis of Ferrocenyl Boranes and their Application as Lewis Acids in Epoxide Rearrangements}}}, doi = {{10.1002/ejic.202400057}}, year = {{2024}}, } @article{52534, author = {{Bauch, Fabian and Dong, Chuan-Ding and Schumacher, Stefan}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, keywords = {{Surfaces, Coatings and Films, Physical and Theoretical Chemistry, General Energy, Electronic, Optical and Magnetic Materials}}, number = {{8}}, pages = {{3525--3532}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Dynamics of Electron–Hole Coulomb Attractive Energy and Dipole Moment of Hot Excitons in Donor–Acceptor Polymers}}}, doi = {{10.1021/acs.jpcc.3c07513}}, volume = {{128}}, year = {{2024}}, } @inproceedings{52573, author = {{Dechert, Christopher and Kenig, Eugeny}}, location = {{Bochum}}, title = {{{Der Einfluss von Mikrostrukturen auf die Flüssigkeitsausbreitung in strukturierten Packungen}}}, year = {{2024}}, } @phdthesis{52576, author = {{Frank, Maximilian}}, isbn = {{978-3-8440-9444-2}}, pages = {{234}}, publisher = {{Shaker Verlag}}, title = {{{Simulationsgestützte Bestimmung und Optimierung der Mischgüte in der Einschneckenextrusion}}}, volume = {{2024,5}}, year = {{2024}}, } @inproceedings{52579, author = {{Hami Dindar, Iman and Lutters, Nicole and Kenig, Eugeny Y.}}, location = {{Ruhr-Universität Bochum}}, title = {{{Wässrige Glucosaminlösung als neues Lösungsmittel zur CO2-Abscheidung}}}, year = {{2024}}, } @article{51518, abstract = {{In applications of piezoelectric actuators and sensors, the dependability and particularly the reliability throughout their lifetime are vital to manufacturers and end-users and are enabled through condition-monitoring approaches. Existing approaches often utilize impedance measurements over a range of frequencies or velocity measurements and require additional equipment or sensors, such as a laser Doppler vibrometer. Furthermore, the non-negligible effects of varying operating conditions are often unconsidered. To minimize the need for additional sensors while maintaining the dependability of piezoelectric bending actuators irrespective of varying operating conditions, an online diagnostics approach is proposed. To this end, time- and frequency-domain features are extracted from monitored current signals to reflect hairline crack development in bending actuators. For validation of applicability, the presented analysis method was evaluated on piezoelectric bending actuators subjected to accelerated lifetime tests at varying voltage amplitudes and under external damping conditions. In the presence of a crack and due to a diminished stiffness, the resonance frequency decreases and the root-mean-square amplitude of the current signal simultaneously abruptly drops during the lifetime tests. Furthermore, the piezoelectric crack surfaces clapping is reflected in higher harmonics of the current signal. Thus, time-domain features and harmonics of the current signals are sufficient to diagnose hairline cracks in the actuators.}}, author = {{Aimiyekagbon, Osarenren Kennedy and Bender, Amelie and Hemsel, Tobias and Sextro, Walter}}, issn = {{2079-9292}}, journal = {{Electronics}}, keywords = {{piezoelectric transducer, self-sensing, fault detection, diagnostics, hairline crack, condition monitoring}}, number = {{3}}, publisher = {{MDPI AG}}, title = {{{Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions}}}, doi = {{10.3390/electronics13030521}}, volume = {{13}}, year = {{2024}}, } @inbook{51364, author = {{Fuchs, Christian}}, booktitle = {{Digitalisierte Massenkommunikation und Verantwortung}}, editor = {{Litschka, Michael and Paganini, Claudia and Rademacher, Lars}}, isbn = {{9783748942801}}, pages = {{21--42}}, publisher = {{Nomos Verlagsgesellschaft mbH & Co. KG}}, title = {{{Grundlagen einer Ethik des Radikalen Digitalen Humanismus}}}, doi = {{10.5771/9783748942801}}, year = {{2024}}, } @article{52587, author = {{Bodden, Eric and Pottebaum, Jens and Fockel, Markus and Gräßler, Iris}}, issn = {{1540-7993}}, journal = {{IEEE Security & Privacy}}, keywords = {{Law, Electrical and Electronic Engineering, Computer Networks and Communications}}, number = {{1}}, pages = {{69--72}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Evaluating Security Through Isolation and Defense in Depth}}}, doi = {{10.1109/msec.2023.3336028}}, volume = {{22}}, year = {{2024}}, } @misc{50208, author = {{Treder, Alexandra}}, booktitle = {{Forschungsportal für Spracherwerb und Migration (daz-portal)}}, title = {{{Alexandra Treder (Universität Paderborn) rezensiert: Döll, Marion & Michalak, Magdalena (2023): Deutsch als Zweitsprache und inklusive Bildung. [Deutsch als Zweitsprache – Positionen, Perspektiven, Potenziale, Bd. 3]. Münster: Waxmann, 142 Seiten. ISBN 978-3-8309-4711-0. }}}, volume = {{26}}, year = {{2024}}, } @book{52590, editor = {{Tatari, Muna and Husic, Ahmed}}, publisher = {{Brill (im Erscheinen)}}, title = {{{The Divine Attributes in Classical Islamic Thought and Con-temporary Islamic Theology}}}, year = {{2024}}, } @article{33461, abstract = {{Data-driven models for nonlinear dynamical systems based on approximating the underlying Koopman operator or generator have proven to be successful tools for forecasting, feature learning, state estimation, and control. It has become well known that the Koopman generators for control-affine systems also have affine dependence on the input, leading to convenient finite-dimensional bilinear approximations of the dynamics. Yet there are still two main obstacles that limit the scope of current approaches for approximating the Koopman generators of systems with actuation. First, the performance of existing methods depends heavily on the choice of basis functions over which the Koopman generator is to be approximated; and there is currently no universal way to choose them for systems that are not measure preserving. Secondly, if we do not observe the full state, we may not gain access to a sufficiently rich collection of such functions to describe the dynamics. This is because the commonly used method of forming time-delayed observables fails when there is actuation. To remedy these issues, we write the dynamics of observables governed by the Koopman generator as a bilinear hidden Markov model, and determine the model parameters using the expectation-maximization (EM) algorithm. The E-step involves a standard Kalman filter and smoother, while the M-step resembles control-affine dynamic mode decomposition for the generator. We demonstrate the performance of this method on three examples, including recovery of a finite-dimensional Koopman-invariant subspace for an actuated system with a slow manifold; estimation of Koopman eigenfunctions for the unforced Duffing equation; and model-predictive control of a fluidic pinball system based only on noisy observations of lift and drag.}}, author = {{Otto, Samuel E. and Peitz, Sebastian and Rowley, Clarence W.}}, journal = {{SIAM Journal on Applied Dynamical Systems}}, number = {{1}}, pages = {{885--923}}, publisher = {{SIAM}}, title = {{{Learning Bilinear Models of Actuated Koopman Generators from Partially-Observed Trajectories}}}, doi = {{10.1137/22M1523601}}, volume = {{23}}, year = {{2024}}, } @phdthesis{52611, abstract = {{Ultraschallsysteme für das Herstellen für Bond- und Schweißverbindungen in der Halbleiterfertigung zeigen auf Grund des Betriebes unter hohen Anregungsniveaus nichtlineare Materialeigenschaften. Dabei wirken unterschiedliche Einflussfaktoren auf die elektrischen Eigenschaften und die mechanischen Übertragungscharakteristiken der Ultraschallsysteme ein. Die Herausforderungen ein solches geprägtes System auszulegen oder effizient und zuverlässig zu betreiben, sind aufgrund der Nichtlinearitäten relativ groß. Da für die Beschreibung der nichtlinearen Materialbeziehungen nur wenige Modelle und kaum quantitative Angaben vorliegen, werden die komplexen Wechselwirkungen von Materialparametern, Geometrie und Vorspannung des Schwingers, Betriebsgrößen (Strom, Spannung), Temperatur und Prozesslasten durch systematische Untersuchungen von Keramiken und Langevin-Schwingern messtechnisch erfasst. Aus den Messergebnissen werden einerseits eindimensionale Modelle für Voruntersuchungen als auch vollständige Materialparametersätze für die Simulation mittels dreidimensionaler FE-Modelle hergeleitet. Eine Methodik zur Ermittlung der Materialparameter und ein auf iterativen Simulationen von FE-Modellen basierendes Werkzeug zur Simulation der komplexen Wechselwirkungen werden vorgestellt. Anhand eines exemplarischen Ultraschallsystems wird gezeigt, dass die Wirkungen temperaturbedingter Vorspannungsverluste, Änderungen des elektrischen Klemmenverhaltens und Amplituden- und Frequenzänderungen während des Betriebes bei großen Amplituden und Prozesslasten durch die Variationen des Keramikvolumens und der Keramikposition positiv beeinflusst werden können.}}, author = {{Dymel, Collin}}, isbn = {{9783844093964}}, keywords = {{Nichtlineares piezoelektrisches Verhalten, Dehnungsabhängigkeit, Vorspannungseinfluss, Temperatureinfluss, Lasteinfluss, Langevin-Schwinger, Ultraschallwandler, Ultraschallbonden, FEM-Modell, Ultraschallschweißen, BVD-Modell}}, pages = {{134}}, publisher = {{Shaker Verlag}}, title = {{{Modellbasierte Entwicklung von Ultraschallwandlern unter der Berücksichtigung von Nichtlinearitäten}}}, volume = {{16}}, year = {{2024}}, } @article{50726, abstract = {{Resistance spot‐welded joints containing press‐hardened steels are seen to exhibit a fracture mode called total dome failure, where the weld nugget completely separates from one steel sheet along the weld nugget edge. The effect of weld nugget shape and material property gradients is studied based on damage mechanics modeling and experimental validation to shed light on the underlying influencing factors. For a three‐steel‐sheet spot‐welded joint combining DP600 (1.5 mm)–CR1900T (1.0 mm)–CR1900T (1.0 mm), experiments under shear loading reveal that fracture occurs in the DP600 sheet along the weld nugget edge. In subsequent numerical simulation studies with damage mechanics models whose parameters are independently calibrated for every involved material configuration, three variations of the geometrical joint configuration are considered—an approximation of the real joint, one variation with a steeper weld nugget shape, and one variation with a less pronounced gradient between weld nugget material and heat‐affected zone material properties. The results of the finite‐element simulations show that a shallower weld nugget and a more pronounced material gradient lead to a faster increase of plastic strain at the edge of the weld nugget and promote the occurrence of total dome failure.}}, author = {{Schuster, Lilia and Olfert, Viktoria and Sherepenko, Oleksii and Fehrenbach, Clemens and Song, Shiyuan and Hein, David and Meschut, Gerson and Biro, Elliot and Münstermann, Sebastian}}, issn = {{1611-3683}}, journal = {{steel research international}}, keywords = {{Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics}}, publisher = {{Wiley}}, title = {{{Influences of Weld Nugget Shape and Material Gradient on the Shear Strength of Resistance Spot‐Welded Joints}}}, doi = {{10.1002/srin.202300530}}, year = {{2024}}, } @phdthesis{52501, author = {{ Hassel, Richard}}, pages = {{161}}, title = {{{Zur Abscheidung von Tröpfchen-Aerosolen in filternden Abscheidern}}}, doi = {{10.17619/UNIPB/1-1870}}, year = {{2024}}, } @article{52631, abstract = {{AbstractFootball is one of the most played sports in the world and kicking with adequate accuracy increases the likelihood of winning a competition. Although studies with different target-directed movements underline the role of distinctive cortical activity on superior accuracy, little is known about cortical dynamics associated with kicking. Mobile electroencephalography is a popular tool to investigate cortical modulations during movement, however, inherent and artefact-related pitfalls may obscure the reliability of functional sources and their activity. The purpose of this study was therefore to describe consistent cortical dynamics underlying target-directed pass-kicks based on test–retest reliability estimates. Eleven participants performed a target-directed kicking task at two different sessions within one week. Electroencephalography was recorded using a 65-channel mobile system and behavioural data were collected including motion range, acceleration and accuracy performance. Functional sources were identified using independent component analysis and clustered in two steps with the components of first and subsequently both sessions. Reliability estimates of event-related spectral perturbations were computed pixel-wise for participants contributing with components of both sessions. The parieto-occipital and frontal clusters were reproducible for the same majority of the sample at both sessions. Their activity showed consistent alpha desyhronization and theta sychnronisation patterns with substantial reliability estimates revealing visual and attentional demands in different phases of kicking. The findings of our study reveal prominent cortical demands during the execution of a target-directed kick which may be considered in practical implementations and provide promising academic prospects in the comprehension and investigation of cortical activity associated with target-directed movements.}}, author = {{Piskin, Daghan Yuksel and Büchel, Daniel and Lehmann, Tim and Baumeister, Jochen}}, issn = {{1871-4080}}, journal = {{Cognitive Neurodynamics}}, keywords = {{Cognitive Neuroscience}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Reliable electrocortical dynamics of target-directed pass-kicks}}}, doi = {{10.1007/s11571-024-10094-0}}, year = {{2024}}, } @misc{52639, author = {{Zink, Timm Florian}}, pages = {{142}}, title = {{{Untersuchung des Lösungsmitellseinflusses auf die Synthese von Manganoxid-Nanopartikeln in der Flammenspraypyrolyse}}}, year = {{2024}}, } @article{52233, abstract = {{ELDIRK methods are defined to have an Explicit Last stage in the general Butcher array of Diagonal Implicit Runge-Kutta methods, with the consequence, that no additional system of equations must be solved, compared to the embedded RK method. Two general formulations for second- and third-order ELDIRK methods have been obtained recently in Mahnken [21] with specific schemes, e.g. for the embedded implicit Euler method, the embedded trapezoidal-rule and the embedded Ellsiepen method. In the first part of this paper, we investigate some general stability characteristics of ELDIRK methods, and it will be shown that the above specific RK schemes are not A-stable. Therefore, in the second part, the above-mentioned general formulations are used for further stability investigations, with the aim to construct new second- and third-order ELDIRK methods which simultaneously are A-stable. Two numerical examples are concerned with the curing for a thermosetting material and phase-field RVE modeling for crystallinity and orientation. The numerical results confirm the theoretical results on convergence order and stability.}}, author = {{Mahnken, Rolf and Westermann, Hendrik}}, issn = {{0178-7675}}, journal = {{Computational Mechanics}}, keywords = {{Applied Mathematics, Computational Mathematics, Computational Theory and Mathematics, Mechanical Engineering, Ocean Engineering, Computational Mechanics}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Construction of A-stable explicit last-stage diagonal implicit Runge–Kutta (ELDIRK) methods}}}, doi = {{10.1007/s00466-024-02442-y}}, year = {{2024}}, } @inbook{51128, author = {{Domke, Marius and Fröhlich, Nadine and Eickelmann, Birgit and Pink, Sara}}, booktitle = {{Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven}}, editor = {{Herzig, B. and Eickelmann, Birgit and Schwabl, F. and Schulze, J. and Niemann, Jan}}, publisher = {{Waxmann Verlag GmbH}}, title = {{{Digitalisierungsbezogene Lehrkräftebildung als Gegenstand internationaler Schulleistungsstudien}}}, year = {{2024}}, } @article{52652, author = {{Herdramm, Henrike}}, journal = {{BloKK. Der Blog des Zentrums für Komparative Theologie und Kulturwissenschaften}}, keywords = {{Ideologiekritik, Tiertheologie, Tierethik}}, title = {{{Das Potenzial von Ideologiekritik im Religionsunterricht}}}, year = {{2024}}, } @misc{52663, abstract = {{Context Static analyses are well-established to aid in understanding bugs or vulnerabilities during the development process or in large-scale studies. A low false-positive rate is essential for the adaption in practice and for precise results of empirical studies. Unfortunately, static analyses tend to report where a vulnerability manifests rather than the fix location. This can cause presumed false positives or imprecise results. Method To address this problem, we designed an adaption of an existing static analysis algorithm that can distinguish between a manifestation and fix location, and reports error chains. An error chain represents at least two interconnected errors that occur successively, thus building the connection between the fix and manifestation location. We used our tool CogniCryptSUBS for a case study on 471 GitHub repositories, a performance benchmark to compare different analysis configurations, and conducted an expert interview. Result We found that 50 % of the projects with a report had at least one error chain. Our runtime benchmark demonstrated that our improvement caused only a minimal runtime overhead of less than 4 %. The results of our expert interview indicate that with our adapted version participants require fewer executions of the analysis. Conclusion Our results indicate that error chains occur frequently in real-world projects, and ignoring them can lead to imprecise evaluation results. The runtime benchmark indicates that our tool is a feasible and efficient solution for detecting error chains in real-world projects. Further, our results gave a hint that the usability of static analyses may benefit from supporting error chains.}}, author = {{Wickert, Anna-Katharina and Schlichtig, Michael and Vogel, Marvin and Winter, Lukas and Mezini, Mira and Bodden, Eric}}, keywords = {{Static analysis, error chains, false positive re- duction, empirical studies}}, title = {{{Supporting Error Chains in Static Analysis for Precise Evaluation Results and Enhanced Usability}}}, year = {{2024}}, }