@article{58472, abstract = {{The “kill chain”—involving the analysis of data by human users of military technologies, the understanding of that data, and human decisions—has fast been replaced by the “kill cloud” that necessitates, allows, and exacerbates increased thirst for domination, violence against distant populations, and a culture of experimentation with human lives. This commentary reports an interdisciplinary discussion organised by the Disruption Network Lab that brought together whistleblowers, artists, and experts investigating the impact of artificial intelligence and other emerging technologies on networked warfare. Exposing the problematics of networked warfare and the kill cloud, their colonial overtones, effects on human subjects in real life, erroneous scientific rationalities, and the (business) practices and logics that enable this algorithmic machinery of violence. The conference took place from the 29th of November to the 1st of December 2024 at the Kunstquartier Bethanien in Berlin, Germany.}}, author = {{Bhila, Ishmael}}, issn = {{2662-1975}}, journal = {{Digital War}}, keywords = {{autonomous weapons systems, algorithmic warfare, cloud computing, war on terror}}, number = {{4}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Investigating the kill cloud: information warfare, autonomous weapons & AI}}}, doi = {{10.1057/s42984-025-00101-x}}, volume = {{6}}, year = {{2025}}, } @article{58489, abstract = {{Abstract Natural everyday situations can offer valuable opportunities for children to develop mathematical ideas. However, as children enter school with widely varying levels of achievement in mathematics, not all children seem to benefit equally from embedded math learning opportunities. To help children take advantage of these opportunities, early childhood (EC) teachers seem to play a significant role in fostering children’s mathematical learning. Previous research suggests that both the teacher’s knowledge and their feedback significantly influence the extent to which children learn. However, most studies on feedback rely on experimental research designs and do not examine naturally occurring feedback in situations involving embedded math learning opportunities. Thus, the influence of EC teachers’ mathematical pedagogical content knowledge (MPCK) and their naturally given feedback on children’s mathematical learning remains underexplored. This paper investigates the effects of naturally given feedback and the MPCK of N = 48 EC teachers on the mathematical development of N = 140 children. Results indicate that process-related feedback positively impacts children’s mathematical development, while other kinds of feedback (e.g., person-related) and teachers’ MPCK do not demonstrate significant effects. These findings highlight the importance of integrating process-related feedback into professional development (PD) programs for EC teachers to enhance their ability to provide effective feedback.}}, author = {{Aumann, Lena and Puca, Rosa Maria and Gasteiger, Hedwig}}, issn = {{1082-3301}}, journal = {{Early Childhood Education Journal}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Effects of Early Childhood Teacher Knowledge and Feedback on Children’s Early Mathematical Development in German Kindergartens}}}, doi = {{10.1007/s10643-025-01859-1}}, year = {{2025}}, } @article{58495, abstract = {{ To reduce CO2 emissions, the industry, particularly in the mobility sector, focuses on lightweight vehicles with multi-material structures. As thermal joining processes are reaching their limits, mechanical techniques such as self-piercing riveting are being used. One innovative solution is the versatile self-piercing riveting process (V-SPR), which combines different material combinations with a multi-range rivet. 1 The joining process is divided into the piercing process and the forming process of the rivet head to the respective sheet thickness. The rivet shaft requires sufficient strength to punch through the punch-sided sheet, and sufficient ductility of the rivet head is required to form onto the punch-sided sheet. To achieve a combination of these requirements, local inductive heat treatment strategies are used for the rivet. To ensure reproducible rivet hardening, a specialised device has been developed for precise rivet positioning in the induction coil and the subsequent quenching process. The heat treatment differs in terms of hardening times and temperatures. In addition, the heat treatment is combined with a subsequent tempering process. The study aims to determine the resulting hardness distributions and microstructures of the rivet and to investigate the influence of different heat treatment strategies on joint formation and load-bearing capacities. The results show that a graded hardening profile has a positive effect on the spreading behaviour of the rivet foot and the forming behaviour of the rivet head. Furthermore, the load-bearing behaviour of the joints is increased. }}, author = {{Holtkamp, Pia Katharina and Kappe, Fabian and Probst, Paula and Bobbert, Mathias and Meschut, Gerson}}, issn = {{1464-4207}}, journal = {{Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}}, publisher = {{SAGE Publications}}, title = {{{Investigation of local heat treatment strategies for a multi-range capable rivet and the influence on joint formation and load-bearing capacity}}}, doi = {{10.1177/14644207241307508}}, year = {{2025}}, } @article{58492, abstract = {{A coupled finite plasticity ductile damage and failure model is proposed for the finite element simulation of clinch joining, which incorporates stress-state dependency and regularisation by gradient-enhancement of the damage variable. Ductile damage is determined based on a failure indicator governed by a failure surface in stress space. The latter is exemplary chosen as a combination of the Hosford–Coulomb and Cockcroft–Latham–Oh failure criteria for the high and low stress triaxiality range, respectively, to cover the wide stress range encountered in forming. Damage is coupled to elasto-plasticity to capture the damage-induced degradation of the stiffness and flow stress. This affects the material behaviour up to failure, thereby realistically altering the stress state. Consequently, especially for highly ductile materials, where substantial necking and localisation precede material fracture, the failure prediction is enhanced. The resulting stress softening is regularised by gradient-enhancement to obtain mesh-objective results. The analysis of a modified punch test experiment emphasises how the damage-induced softening effect can strongly alter the actual stress state towards failure. Moreover, the impact of successful regularisation is shown, and the applicability of the damage and failure model to clinch joining is proven.}}, author = {{Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul}}, issn = {{0022-5096}}, journal = {{Journal of the Mechanics and Physics of Solids}}, keywords = {{Finite plasticity, Ductile damage, Gradient-enhancement, Stress-state dependency, Failure}}, publisher = {{Elsevier BV}}, title = {{{Modelling of stress-state-dependent ductile damage with gradient-enhancement exemplified for clinch joining}}}, doi = {{10.1016/j.jmps.2025.106026}}, volume = {{196}}, year = {{2025}}, } @article{58493, author = {{Zietlow, Christian and Lindner, Jörg K. N.}}, issn = {{2045-2322}}, journal = {{Scientific Reports}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{An applied noise model for scintillation-based CCD detectors in transmission electron microscopy}}}, doi = {{10.1038/s41598-025-85982-4}}, volume = {{15}}, year = {{2025}}, } @article{58178, author = {{Lindner, Jörg K. N. and Zietlow, Christian}}, issn = {{0304-3991}}, journal = {{Ultramicroscopy}}, publisher = {{Elsevier BV}}, title = {{{An applied noise model for low-loss EELS maps}}}, doi = {{10.1016/j.ultramic.2024.114101}}, year = {{2025}}, } @article{58473, abstract = {{Using a large unique longitudinal survey data set from Germany covering more than 5,000 households, we analyze stated intentions and actual implementations of both flood-proofing and heat stress reduction measures to assess the intention behavior gap (IBG) in climate change adaptation. Our results do not only reveal a substantial IBG for most stated intentions, but also show their limits in serving as a good predictor for realized actions later. Moreover, the IBG itself can hardly be explained by observable household data characteristics. While we do find some similarities in explanatory variables affecting both intentions and implementations, these variables provide only little insights into the actual levels of implemented actions. In line with regret theory, the IBG in our data can be partly explained by anticipated regret caused by a feeling of having invested in vain in cases where adaptation measures are installed, but extreme weather events do not occur for the time being. Our results are informative for adaptation-related communication campaigns and public policy interventions, especially in the aftermath of natural disasters.}}, author = {{Osberghaus, Daniel and Botzen, Wouter and Kesternich, Martin}}, journal = {{Ecological Economics }}, keywords = {{Intention-behavior gap, Adaptation, Climate Change, Flooding, Heat}}, title = {{{The intention-behavior gap in climate change adaptation: Evidence from longitudinal survey data}}}, year = {{2025}}, } @inproceedings{58498, author = {{Wehde, Janis}}, location = {{Mannheim}}, title = {{{Determinanten der politischen Involviertheit von Lehramtsstudierenden und damit verbundene Implikationen für die Lehrer*innenbildung}}}, year = {{2025}}, } @inproceedings{57899, abstract = {{In Haushaltskältegeräten werden in den letzten Jahren immer häufiger Vakuumisolationspaneele (VIP) eingesetzt. Hiermit ist es unter anderem möglich, dass die Geräte in die Energieeffizienzklassen A bis C klassifiziert werden können. Ein VIP besteht vereinfacht aus einer Schutzfolie, die nahezu gasdicht ist und einem Füllmaterial, welches für die Formstabilität im Vakuum zuständig ist. Aufgrund von technischen Alterungsprozessen kommt es mit der Zeit zu einem Anstieg des Innendrucks im VIP, wodurch die Wärmeleitfähigkeit des VIP steigt. Je nach Füllmaterial erfolgt dieser Alterungsprozess unterschiedlich schnell. Im Extremfall kann so ein neues Haushalts-kältegerät der Energieeffizienzklasse A nach 1 bis 3 Jahren nur noch als Klasse D bis F eingestuft werden. Innerhalb eines Forschungsprojekts wurden Haushaltskältegeräte mit VIP thermografisch untersucht. Im Rahmen dieser Studienarbeit wurde ein Versuchsaufbau entwickelt, mit dem die zeitliche Veränderung von Wärmebrücken begutachtet werden kann und so Rückschlüsse auf den Effizienzverlust der Geräte möglich sind. Der Funkionsnachweises dieses Versuchsaufbaus wurden an einem Haushaltskältegerät mit künstlich gealterten Vakuumisolationspaneelen durchgeführt. Diese Arbeiten bieten zukünftig die Möglichkeiten Haushaltskältegeräten mit VIP bezüglich ihres Degenerationsverhaltens besser zu beurteilen. }}, author = {{Potthast, Emily and Elsner, Andreas and Paul, Andreas and Kasper, Tina}}, booktitle = {{Deutsche Kälte- und Klimatagung 2024 Dresden}}, keywords = {{Haushaltskältegeräte, Energieaufnahme, Alterung, Isolierung, Vakuumisolationspaneele}}, location = {{Dresden}}, publisher = {{Deutscher Kälte‐ und Klimatechnischer Verein e.V.}}, title = {{{Thermografische Messungen an Haushaltskältegeräten mit Vakuumisolationspaneele}}}, year = {{2025}}, } @inproceedings{56338, author = {{Löper, Marwin Felix and Finke, Nils and Knickenberg, Margarita and Hellmich, Frank}}, publisher = {{Universität Mannheim}}, title = {{{Feedback und selbstbezogene Kognitionen als Prädiktoren für die Mathematikleistungen von Grundschulkindern. Vortrag im Rahmen des Symposiums „Lernen durch Feedback von Lehrpersonen, Eltern und Schüler:innen“ (Sebastian Röhl & Fabian Hoya) auf der 12. Tagung der Gesellschaft für Empirische Bildungsforschung (GEBF). Thema: „Bildung als Schlüssel für gesellschaftliche Herausforderungen: Interdisziplinäre Beiträge aus der Bildungsforschung“}}}, year = {{2025}}, } @article{58510, abstract = {{Today’s ultrasonic transducers find broad application in diverse technology branches and most often cannot be replaced by other actuators. They are typically based on lead-containing piezoelectric ceramics. These should be replaced for environmental and health issues by lead-free alternatives. Multiple material alternatives are already known, but there is a lack of information about their technological readiness level. To fill this gap, a small series of prestressed longitudinally vibrating transducers was set up with a standard PZT material and two lead-free variants within this study. The entire process for building the transducers is documented: characteristics of individual ring ceramics, burn-in results, and free vibration and characteristics under load are shown. The main result is that the investigated lead-free materials are ready to use within ultrasonic bolted Langevin transducers (BLTs) for medium-power applications, when the geometrical setup of the transducer is adopted. Since lead-free ceramics need higher voltages to achieve the same power level, the driving electronics or the mechanical setup must be altered specifically for each material. Lower self-heating of the lead-free materials might be attractive for heat-sensitive processes.}}, author = {{Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}}, issn = {{2076-0825}}, journal = {{Actuators}}, number = {{2}}, publisher = {{MDPI AG}}, title = {{{Lead-Free Ceramics in Prestressed Ultrasonic Transducers}}}, doi = {{10.3390/act14020055}}, volume = {{14}}, year = {{2025}}, } @article{58370, author = {{Burmeister, Sascha Christian and Guericke, Daniela and Schryen, Guido}}, journal = {{Cleaner Energy Systems}}, publisher = {{Elsevier}}, title = {{{A two-level approach for multi-objective flexible job shop scheduling and energy procurement}}}, doi = {{10.1016/j.cles.2025.100178}}, year = {{2025}}, } @article{58520, author = {{Haker, Christoph}}, issn = {{0863-4564}}, journal = {{Berliner Debatte Initial}}, number = {{2}}, pages = {{207--223}}, publisher = {{Wissenschaftliche Verlagsgesellschaft mbH}}, title = {{{Rechtspopulismus und Rechtsextremismus an Hochschulen}}}, doi = {{10.25162/bdi-2024-0015}}, volume = {{35}}, year = {{2025}}, } @article{58521, author = {{Haker, Christoph}}, issn = {{2939-9416}}, journal = {{Kieler sozialwissenschaftliche Revue. Internationales Tönnies-Forum}}, number = {{2-2024}}, pages = {{133--147}}, publisher = {{Verlag Barbara Budrich GmbH}}, title = {{{Normative Grundlagen des pluralistischen Paradigmas}}}, doi = {{10.3224/ksr.v2i2.02}}, volume = {{2}}, year = {{2025}}, } @inbook{58518, author = {{Hartmann, Alexandra}}, booktitle = {{Political Education and American Studies}}, editor = {{Franke, Astrid and Küchler, Uwe and Luther, Katharina}}, isbn = {{978-3-8253-9615-2}}, pages = {{213--218}}, publisher = {{Winter}}, title = {{{(Re)Polizicizing the Teen Genre: On the (Queer) Utopian Potentials of Netflix's Sex Education}}}, year = {{2025}}, } @article{58193, abstract = {{Zinc tin oxide (ZTO) is investigated as a photoluminescent sensor for oxygen (O2); chemisorbed oxygen quenches the luminescence intensity. At the same time, ZTO is also studied as a resistive sensor; being an n‐type semiconductor, its electrical conductance decreases by adsorption of oxygen. Both phenomena can be exploited for quantitative O2 sensing. The respective sensor responses can be described by the same modified Stern‐Volmer model that distinguishes between accessible and non‐accessible luminescence centers or charge carriers, respectively. The impact of the temperature is studied in the range from room temperature up to 150 °C.}}, author = {{Kothe, Linda and Klippstein, Josefin and Kloß, Marvin and Wengenroth, Marc and Poeplau, Michael and Ester, Stephan and Tiemann, Michael}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, pages = {{e202400984}}, publisher = {{Wiley}}, title = {{{Oxygen‐dependent Photoluminescence and Electrical Conductance of Zinc Tin Oxide (ZTO): A Modified Stern‐Volmer Description}}}, doi = {{10.1002/cphc.202400984}}, volume = {{26}}, year = {{2025}}, } @article{59344, abstract = {{Abstract For a finite graph, we establish natural isomorphisms between eigenspaces of a Laplace operator acting on functions on the edges and eigenspaces of a transfer operator acting on functions on one-sided infinite non-backtracking paths. Interpreting the transfer operator as a classical dynamical system and the Laplace operator as its quantization, this result can be viewed as a quantum-classical correspondence. In contrast to previously established quantum-classical correspondences for the vertex Laplacian which exclude certain exceptional spectral parameters, our correspondence is valid for all parameters. This allows us to relate certain spectral quantities to topological properties of the graph such as the cyclomatic number and the 2-colorability. The quantum-classical correspondence for the edge Laplacian is induced by an edge Poisson transform on the universal covering of the graph which is a tree of bounded degree. In the special case of regular trees, we relate both the vertex and the edge Poisson transform to the representation theory of the automorphism group of the tree and study associated operator valued Hecke algebras.}}, author = {{Arends, Christian and Frahm, Jan and Hilgert, Joachim}}, issn = {{0926-2601}}, journal = {{Potential Analysis}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Edge Laplacians and Edge Poisson Transforms for Graphs}}}, doi = {{10.1007/s11118-024-10184-y}}, year = {{2025}}, } @article{59343, abstract = {{Abstract On a finite regular graph, (co)resonant states are eigendistributions of the transfer operator associated to the shift on one-sided infinite non-backtracking paths. We introduce two pairings of resonant and coresonant states, the vertex pairing which involves only the dependence on the initial/terminal vertex of the path, and the geodesic pairing which is given by integrating over all geodesics the evaluation of the coresonant state on the first half of the geodesic times the resonant state on the second half. The main result is that these two pairings coincide up to a constant which depends on the resonance, i.e. the corresponding eigenvalue of the transfer operator.}}, author = {{Arends, Christian and Frahm, Jan and Hilgert, Joachim}}, issn = {{0025-5831}}, journal = {{Mathematische Annalen}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{A pairing formula for resonant states on finite regular graphs}}}, doi = {{10.1007/s00208-025-03140-7}}, year = {{2025}}, } @article{59345, abstract = {{ABSTRACTWe study the effect of education on vaccination against COVID in Germany in a sample of individuals above the age of 60. In ordinary least squares regressions, we find that, in this age group, one more year of education goes along with a 0.7 percentage point increase in the likelihood to get a COVID vaccination. In two stage least squares regressions where changes in compulsory schooling laws are used as exogenous variation for education, the effect of an additional year of education is estimated to be zero. The results hold for the compliers to the policy change which are older individuals at the lowest margin of education.}}, author = {{Monsees, Daniel and Schmitz, Hendrik}}, issn = {{1057-9230}}, journal = {{Health Economics}}, number = {{4}}, pages = {{643--654}}, publisher = {{Wiley}}, title = {{{The Effect of Compulsory Schooling on Vaccination Against COVID}}}, doi = {{10.1002/hec.4929}}, volume = {{34}}, year = {{2025}}, } @article{59348, author = {{Bodynek, Joanna}}, journal = {{Praxis Sprache }}, number = {{2}}, pages = {{91--95}}, publisher = {{Schulz-Kirchner-Verlag}}, title = {{{Gamification in der Förderung schriftsprachlicher Fähigkeiten - Motivationssteigerung durch spielerische Elemente in digitalen Anwendungen}}}, doi = {{10.2443/skv-s-2025-56020250203}}, year = {{2025}}, }