@article{65631, abstract = {{Abstract Mathematics textbooks used to be the key resource for students’ self-regulated learning of mathematics. Primarily due to the digitalization of society, students have potentially greater access to a wider range of resources such as internet search engines, learning platforms, educational videos, and Generative AI. This study investigates the role of the mathematics textbook in comparison to other resources within students’ self-regulated learning practices. Data were collected via a survey of 1101 German secondary students, representing three school types ( Gymnasium , Gesamtschule , Realschule ) and three grade levels (6, 9, and upper secondary). The questionnaire assessed the frequency of resource use in and outside class, reasons and purposes of use, and resource-based strategies when facing learning challenges outside class. Results show that the printed mathematics textbook is the most frequently used resource both in class and outside class. The textbook remains the most relevant resource for key purposes, such as an aid for doing homework and preparing for tests and exams. However, its dominance diminishes with age: in upper secondary school, students increasingly rely on self-created notes, and online resources. Correlation analyses reveal moderate to strong links between in-class and out-of-class use, suggesting an association between resource use and classroom culture. The findings underscore the textbook’s enduring centrality as a foundational, trusted resource within a dynamic and increasingly diverse learning environment. This study calls for pedagogical approaches that integrate textbooks more intentionally within broader resource systems, supporting students’ agency and strategic resource selection in an era of digital abundance. }}, author = {{Stallmeister, Lea and Rezat, Sebastian}}, issn = {{0013-1954}}, journal = {{Educational Studies in Mathematics}}, keywords = {{mathematics, textbooks, userstudy, resources, digital resources, students, secondary eduction}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{The role of the mathematics textbook in times of resource diversity}}}, doi = {{10.1007/s10649-026-10511-7}}, year = {{2026}}, } @article{65630, abstract = {{Mathematics textbooks used to be the key resource for students’ self-regulated learning of mathematics. Primarily due to the digitalization of society, students have potentially greater access to a wider range of resources such as internet search engines, learning platforms, educational videos, and Generative AI. This study investigates the role of the mathematics textbook in comparison to other resources within students’ self-regulated learning practices. Data were collected via a survey of 1101 German secondary students, representing three school types (Gymnasium, Gesamtschule, Realschule) and three grade levels (6, 9, and upper secondary). The questionnaire assessed the frequency of resource use in and outside class, reasons and purposes of use, and resource-based strategies when facing learning challenges outside class. Results show that the printed mathematics textbook is the most frequently used resource both in class and outside class. The textbook remains the most relevant resource for key purposes, such as an aid for doing homework and preparing for tests and exams. However, its dominance diminishes with age: in upper secondary school, students increasingly rely on self-created notes, and online resources. Correlation analyses reveal moderate to strong links between in-class and out-of-class use, suggesting an association between resource use and classroom culture. The findings underscore the textbook’s enduring centrality as a foundational, trusted resource within a dynamic and increasingly diverse learning environment. This study calls for pedagogical approaches that integrate textbooks more intentionally within broader resource systems, supporting students’ agency and strategic resource selection in an era of digital abundance.}}, author = {{Stallmeister, Lea and Rezat, Sebastian}}, journal = {{Educational Studies in Mathematics}}, publisher = {{Springer}}, title = {{{The role of the mathematics textbook in times of resource diversity}}}, doi = {{10.1007/s10649-026-10511-7}}, year = {{2026}}, } @article{65674, author = {{Quast, Julia}}, issn = {{2191-995X}}, journal = {{Indes}}, number = {{4}}, pages = {{53--61}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Achtung – Panzer!}}}, doi = {{10.13109/inde.2025.13.4.53}}, volume = {{13}}, year = {{2026}}, } @article{65730, abstract = {{Abstract Is explainable AI feasible and desirable, and are explanations of AI decisions always good? Many answer this question in the affirmative, but there is a growing discourse that is suspicious of the promises of explainable AI used to explain decisions towards users, considering it unfeasible, undesirable, and even potentially misleading. Could explainable AI be just a rhetorical foil? This paper proposes that, yes, explainable AI is a rhetorical technology but no, this does not necessarily make it undesirable. It starts by revisiting this debate according to the initial charge against rhetorics by Plato and Aristotle’s response, considering rhetoric pharmacologically, as not only a poison but also a cure for political life. It argues that, just as rhetoric was necessary to take care of the temporalities of public life, in court, the public event, and the assembly, so may explainable AI contribute to a rhetorical context. Yet, whether it does so is conditioned on the extent to which it cultivates the civic virtues relative to a respective context. The paper considers the examples of predictive policing, credit scoring, and prediction markets to argue about ideal states – civic virtues that may be cultivated in each appropriate context – and deviations that point at the risks of explainable AI to lead to domination, conformism, and political recalcitrance.}}, author = {{Reijers, Wessel}}, issn = {{0167-7411}}, journal = {{Topoi}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Explainable AI as a Rhetorical Technology: Promoting Civic Virtue in the Age of AI}}}, doi = {{10.1007/s11245-026-10451-0}}, year = {{2026}}, } @article{65739, author = {{Garske, Volker}}, journal = {{Handbuch der Religionen}}, number = {{88}}, publisher = {{Westarp Science}}, title = {{{Schattenprinzip und Klimawandel - Entwicklungschancen für Lehrende und Lernende im Kontext des Ökologischen Lernens, erarbeitet am Beispiel der Massentierhaltung }}}, year = {{2026}}, } @article{65741, abstract = {{ This work investigates the temperature dependence of the lattice constant a exp of cubic GaN/3C‐SiC/Si (001) epilayers grown at 740°C by plasma‐assisted molecular beam epitaxy is investigated. High resolution X‐ray diffraction is performed to determine the lattice constant, using an Anton–Paar DHS1100 stage to vary the sample temperature from 25°C to 900°C, calibrated against the underlying single‐crystalline silicon substrate. A linear increase in a exp with rising temperature is observed. The thermal expansion behaviour is modelled using Debye´s phonon dispersion. The fitted lattice parameters are used to calculate the thermal expansion coefficient (TEC). At room temperature the TEC is determined to be α Debye  ≈ 5.25 × 10 −6  K −1 . We further compare the TEC of the cubic GaN epilayer to that of free‐standing hexagonal GaN using the crystallographic relationship of , demonstrating good agreement between both phases. Using literature values for the elastic constants of cubic GaN, the corresponding elastic moduli and Debye temperature Θ D are calculated. An average value of Θ D of ≈905 ± 25 K is obtained, which is very close to our experimental results. Moreover, tensile strain is found to be present in our sample at room temperature, leading to an increase in the TEC. The impact of strain on the thermal properties of cubic GaN is discussed. }}, author = {{As, Donat Josef and Meier, Falco and Mahler, Pascal and Meier, Cedrik}}, issn = {{0370-1972}}, journal = {{physica status solidi (b)}}, number = {{2}}, publisher = {{Wiley}}, title = {{{X‐Ray Investigation of the Thermal Expansion Coefficient of Cubic Gallium Nitride on 3C‐SiC (001)/Si (001) Substrates}}}, doi = {{10.1002/pssb.202500477}}, volume = {{263}}, year = {{2026}}, } @inbook{63615, author = {{Meyer-Hamme, Johannes and Hartung, Olaf}}, booktitle = {{Handbuch Praxis des Geschichtsunterrichts}}, editor = {{Barricelli, Michele and Lücke, Martin}}, isbn = {{978-3-7344-1775-7}}, issn = {{1435-7658}}, publisher = {{Wochenschau Verlag}}, title = {{{Historisches Lernen}}}, year = {{2026}}, } @inbook{57910, author = {{Sackel, Johanna}}, booktitle = {{The Routledge Handbook on the Economic History of Natural Resources }}, editor = {{Storli, Espen and Dungy, Madeleine and Gerrard, Audrey}}, title = {{{Fisheries and Fishing}}}, year = {{2026}}, } @techreport{65816, author = {{Schmitz, Hendrik and Nguyen, Thao Le}}, title = {{{Education as a Moderator of Genetic Mortality Risk}}}, year = {{2026}}, } @article{65865, abstract = {{Mathematical problem solving is a highly complex competence that needs to be supported throughout the learning process. This study examines the role of problem-solving heuristics among 73 sixth-grade students in a German secondary school (Gesamtschule). Specifically, we focus on the empirical relationship between the occurrence of heuristics, their suitability, and application, as well as their contribution to problem-solving success. To this end, we developed a heuristic training that introduced strategy keys (heuristic aid cards) accompanied by explanatory videos. By leveraging variations in the successful application of the heuristics between students and across multiple sessions (73 students in 4 training situations and 3 problems in a final test), we discover from regression models with student and task-fixed effects that a successful use of heuristics (i.e., an heuristic occurred, that heuristic had a high suitability regarding the problem, and it was applied correctly) leads to more successful mathematical problem solving. Regarding the underlying mechanism, we find that all dimensions of heuristic use (occurrence, suitability, and application of heuristics) are positively related to problem-solving success. When comparing the predictive capacity of all three aspects, we identified the correct application of heuristics as particularly conducive for better problem-solving success. In comparing the group of students with high to those with low initial math competence, we find no significant differences in the relationship between heuristic use and problemsolving success across achievement groups. Our results emphasize the crucial role of heuristic application in mathematical problem solving, which generally benefits students regardless of their overall math competence.}}, author = {{Herold-Blasius, Raja and Kleinschmidt, Hannah and Ziller, Conrad}}, journal = {{Journal für Mathematik-Didaktik}}, number = {{6}}, title = {{{Dimensions of Heuristic Use in Mathematical Problem Solving: Evidence from Early Secondary School Students}}}, doi = {{https://doi.org/10.1007/s13138-026-00270-6}}, volume = {{47}}, year = {{2026}}, } @inproceedings{64616, abstract = {{The circular economy offers decisive advantages over the currently prevalent linear economy in industry. Firstly, the reuse of products, individual parts and material reduces the need for new production or generation and the associated consumption of energy and resources. Secondly, it helps to avoid the generation of waste. Early consideration of circular economic principles in product development processes is essential to specifically promote reuse, reparability and recycling. Efficient recycling of assemblies requires well-defined strategies. However, various challenges hinder the efficiency of technical recycling processes in industrial applications. This paper presents an Ishikawa (fishbone) diagram-based approach to systematically identify and categorize these influences. The method is implemented within an industrial framework, highlighting key obstacles such as material composition, design constraints, use of technology, framework conditions, economic limitations and regulatory challenges. By applying a scenario analysis, this approach examines potential future developments and their impact on recycling-oriented design choices. This helps to identify critical influencing factors and supports the development of resilient and sustainable industrial practices. This framework will serve as the foundation for developing an automated approach to circular design, enabling industries to more effectively integrate sustainability into their processes and adapt to changing environmental demands.}}, author = {{Rohde, Katharina and Gonzalez, Barbara Fernandez and Budde, Finn Lukas and Ott, Manuel and Mozgova, Iryna and Mendibe, Alain Alonso}}, booktitle = {{Safe and Sustainable Value Creation by Design - Proceedings of the 21st Global Conference on Sustainable Manufacturing}}, editor = {{Kohl, Holger and Seliger, Günther and Dietrich, Franz and Campana, Giampaolo}}, location = {{Bologna, Italy}}, pages = {{378--395}}, publisher = {{Springer Nature Switzerland AG}}, title = {{{Unveiling Barriers to Recycling with a Focus on Design: An Ishikawa Diagram-Based Approach with Industrial Application}}}, doi = {{https://doi.org/10.1007/978-3-032-21157-6_43}}, volume = {{1}}, year = {{2026}}, } @inbook{66451, author = {{Huybrechts, Yves}}, booktitle = {{Verhandeln und Repräsentieren in der Frühen Neuzeit: Europa, Reich, Region. Festschrift für Christoph Kampmann zum 65. Geburtstag}}, editor = {{Niggemann, Ulrich and Tischer, Anuschka and Wenzel, Christian}}, pages = {{113--134}}, publisher = {{De Gruyter Oldenbourg}}, title = {{{Ferne Exklaven, große Gefahr: Die Folgen dänischer Ansprüche auf die Herrschaft Jever für das Reich und die Spanischen Niederlande (1677–1686)}}}, doi = {{https://doi.org/10.1515/9783111546704-007}}, year = {{2026}}, } @misc{65799, author = {{Huybrechts, Yves}}, booktitle = {{Archiv für das Studium der neueren Sprachen und Literaturen }}, number = {{1}}, title = {{{A n j a v a n d e Po l -Te g g e : Belgische Literaturen in deutscher Übersetzung. Kulturelle und historische Verflechtungen von 1945 bis zur Gegenwart. Bielefeld: Transcript 2023 (Interkulturalität. Studien zu Sprache, Literatur und Gesellschaft, 25)}}}, volume = {{263}}, year = {{2026}}, } @misc{66453, author = {{Huybrechts, Yves}}, booktitle = {{Historische Zeitschrift}}, title = {{{Simon Watteyne, Lever l’impôt en Belgique. Une histoire de combats politiques (1830–1962). Brüssel, CRISP 2023}}}, year = {{2026}}, } @book{66654, author = {{Heinrichs, Ulrike and Herrmann, Sabine and Schwieger, Olaf and Schumann, Dirk and Kuhn, Michaela and Knödler, Julia and Borchert-Pickenhan, Jens and Voigt, Martina and Stork, Hans-Walter and von Perger, Mischa and Knüvener, Peter and Fabritius, Helga and Möhlenkamp, Annegret and Hasselmann, Cord-Georg}}, isbn = {{ISBN 978-3-98501-421-7}}, pages = {{665}}, publisher = {{arthistoricum.net}}, title = {{{Der Wandmalereizyklus zu den Wissenschaften und Künsten in der Brandenburger Domklausur im Kontext}}}, doi = {{10.11588/ARTHISTORICUM.1740}}, year = {{2026}}, } @inbook{65406, author = {{Jacke, Christoph}}, booktitle = {{Angriff aufs Schlaraffenland. Ein Deutschpunk-Mixtape.}}, editor = {{Engelmann, Jonas}}, isbn = {{978-3-95575-257-6}}, pages = {{65--68}}, publisher = {{Ventil Verlag}}, title = {{{Palais Schaumburg: Gute Luft (1981). Grünes Winkelkanu im Tischtenniskeller.}}}, year = {{2026}}, } @techreport{61278, abstract = {{This report outlines foundations of digital democracy and digital democracy research. It is structured into eight chapters: Chapter 1: Introduction Chapter 2: What is Digital Democracy? Chapter 3: Online Participation Chapter 4: Open Governance Chapter 5: Digital Activism Chapter 6: e-Voting Chapter 7: Global Trends that Influence Digital Democracy Chapter 8: Foreign Interferences in Democracy}}, author = {{Fuchs, Christian and Friesch, Kevin and Museba, Joel}}, pages = {{320}}, publisher = {{INNOVADE}}, title = {{{INNOVADE Interdisciplinary Knowledge Base on Digital Democracy - D2.1 }}}, doi = {{10.5281/zenodo.20341002}}, year = {{2026}}, } @book{66102, abstract = {{In diesem Open-Access-Buch untersucht Tessa-Marie Menzel das Ideal und die diskursive Hervorbringung der 'guten' Mutter in Sozialen Medien. Im Zentrum steht die App Instagram als digitale Öffentlichkeit, in der sogenannte Momfluencerinnen Mutterschaft öffentlich inszenieren und normativ rahmen. Vor dem Hintergrund widersprüchlicher gesellschaftlicher Erwartungen zwischen intensiver Fürsorge und weiblicher Selbstverwirklichung wird mit Hilfe einer Diskursanalyse untersucht, welches Bild der 'guten' Mutter (re-)produziert und legitimiert wird. Anhand von sechs normativen Figuren ‚guter‘ Mutterschaft zeigen die Ergebnisse, dass konkurrierende Anforderungen zu einem scheinbar mühelosen Ideal verschmelzen, bei dem Stress zum Statussymbol wird und Mutterschaft an soziale und ökonomische Privilegien gebunden ist.}}, author = {{Menzel, Tessa-Marie}}, keywords = {{Mutterschaft, Instagram, Diskursanalyse, Sozialpädagogik, Erziehungswissenschaft}}, pages = {{326}}, publisher = {{Springer VS Wiesbaden}}, title = {{{Die 'gute' Mutter - Eine diskursanalytische Untersuchung von Mutterschaft in Sozialen Medien}}}, doi = {{https://doi.org/10.1007/978-3-658-52388-6}}, year = {{2026}}, } @inbook{66299, author = {{Herzig, Bardo}}, booktitle = {{The Age of EdTech: Bildungstechnologie im Spannungsfeld zwischen Innovation und Qualität }}, editor = {{Brüggemann, Tim and Tuchscherer-Schad, Marie and Wiepcke, Claudia}}, isbn = {{978-3-658-49954-9}}, pages = {{395--411}}, publisher = {{Springer VS}}, title = {{{Bildungstechnologie in der schulischen Bildung}}}, doi = {{10.1007/9783658499556}}, year = {{2026}}, } @inbook{66761, abstract = {{Sowohl in Burhan Qurbanis "Berlin Alexanderplatz" als auch in Visar Morinas "Exil" werden Paradoxien der postmigrantischen Gesellschaft mittels einer filmischen Ästhetik des Traums reflektiert. In Qurbanis radikaler Aktualisierung von Döblins Berlin "Alexanderplatz" ist die Hauptfigur ein Schwarzer Geflüchteter, der in Deutschland auf einen Neuanfang als ‚anständiger Mensch‘ hofft. Morinas Exil erzählt die Geschichte eines scheinbar vorbildlich integrierten Migranten, der sich plötzlich als Opfer von Rassismus erlebt. Die Filme werden hier als Variationen eines Systemalbtraums gelesen, weil in beiden Fällen die kollektiven Ängste der Dominanzgesellschaft vor dem ‚parasitären Anderen‘ und die Idee der pluralen Demokratie zur Kollision gebracht werden.}}, author = {{Morrien, Rita}}, booktitle = {{Grenz(über)fälle und Grenzgänge: Literatur, Kunst und gesellschaftliche Dynamiken ab 2000}}, editor = {{Debska, Maja and Heidemann, Gudrun}}, isbn = {{978-3-447-12508-6}}, issn = {{2751-6121}}, keywords = {{Postmigrantischer Film, Traumästhetik, Burhan Qurbani, Berlin Alexanderplatz, filmische Adaption, Visar Morina}}, pages = {{73--89}}, publisher = {{Harrassowitz Verlag}}, title = {{{Variationen eines Systemalptraums: Postmigrantische Befindlichkeiten in Burhan Qurbanis "Berlin Alexanderplatz" und Visar Morinas "Exil"}}}, year = {{2026}}, }