@inbook{65599, author = {{Schlüter, Alexander and Krogbäumker, Luisa and Böse, Kevin and Riese, Julia}}, booktitle = {{Hydrogen and Bioenergy}}, isbn = {{9780443404931}}, publisher = {{Elsevier}}, title = {{{Opportunities and obstacles for industrial applications}}}, doi = {{10.1016/b978-0-443-40493-1.00019-x}}, year = {{2026}}, } @inproceedings{65013, author = {{Illian, Marvin and Khalili, Ramin and A. de A. Rocha, Antonio and Wang, Lin}}, booktitle = {{2026 24th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)}}, publisher = {{IFIP}}, title = {{{Cells on Autopilot: Adaptive Cell (Re)Selection via Reinforcement Learning}}}, 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{65754, abstract = {{ABSTRACT The integration of heat pumps offers a promising route for electrifying chemical processes and reducing CO 2 emissions. Their feasibility strongly depends on the temperature levels and the quantities of available heat sources and sinks, which can be influenced by adjusting process operating parameters to enhance integration potential. The number and quality of these sources and sinks also determine suitable heat pump configurations and therefore the technical and economic viability of implementation. In addition, refrigerant selection is a critical factor, as it is restricted by regulations such as the F‐Gas Regulation. This study investigates how different operating parameters affect the integration potential of various heat pump configurations in a CO 2 absorption process using MEA as solvent. Furthermore, economic evaluations are carried out considering different electricity price scenarios and allowable refrigerants. }}, author = {{Wloch, Johannes and Grünewald, Marcus and Riese, Julia}}, issn = {{0009-286X}}, journal = {{Chemie Ingenieur Technik}}, publisher = {{Wiley}}, title = {{{Matching Heat Pump Configurations and Process Parameters for Cost‐Minimal Heat‐Integrated CO2-Capturing Process}}}, doi = {{10.1002/cite.70131}}, 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}}, } @article{63838, abstract = {{Industrial electrification is increasing to reduce fossil fuel dependence, alongside a growing share of volatile renewables. A secure and reliable energy supply is crucial for industry, leading to a shift from centralised to decentralised grid structures. DC microgrids becoming increasingly popular in industry, since they enable energy recuperation from braking, reduce components and cables, and integrate storage and local generation to manage supply interruptions or peak loads. EVs add further synergies by serving as mobile storage units, helping to store and redistribute locally generated renewable energy. This paper analyses how EV integration in droop-controlled DC grids can contribute to a more stable, low-emission and peak-reduced load profile to the supply grid through load shifting and bridge interruptions. A droop-controlled DC grid model has been developed, incorporating an EV charging park based on probability functions. Scalable scenarios allow for diverse condition analysis using an energy management system that utilises fuzzy logic and sequential MILP optimisation. It has been shown that a 7% improvement of coefficient represented grid-serving behaviour is possible by load shifting. It has also been demonstrated that an optimised EMS can reduce the demand-based CO2 emissions by 41kg for a representative day compared to a fuzzy logic EMS. At the same time peak load is decreased yielding a more constant residual load. These results highlight the potential of a controlled bidirectional charging infrastructure in DC grids and underscore the need to explicitly consider charging processes to ensure a residual load as constant as possible.}}, author = {{Rahlf, Henning Christoph and Knorr, Lukas and Althoff, Simon and Meschede, Henning}}, issn = {{2666-9552}}, journal = {{Smart Energy}}, keywords = {{DC-grid, Droop control, Grid-serving behaviour, Grid stability, Bidirectional charging, Sequential decision, MILP optimisation}}, publisher = {{Elsevier BV}}, title = {{{Analysis of bidirectional EV charging infrastructures within industrial DC grids}}}, doi = {{10.1016/j.segy.2026.100227}}, year = {{2026}}, } @inproceedings{65764, abstract = {{Information systems (IS) research is increasingly exploring the potential of generative artificial intelligence (GenAI), such as large language models (LLMs). For design science research (DSR), such technologies foster entirely new vistas for the design of IT artifacts that make use of their generative capabilities, but also influence DSR methodology. This shift is much more profound than it has been discussed so far. To identify existing implications of GenAI for design-oriented research in IS, we report results from an integrative literature review of recent DSR publications in leading IS outlets. Thereby, we synthesize five major theoretical challenges that arise when using GenAI in DSR projects: (1) an obscure composition of the artifact, (2) an opaque contextualization of the LLM, (3) a fragile internal consistency of the artifact, (4) a rapid erosion of prescriptive knowledge, and (5) missing methodological guidance. We investigate these challenges and conceptualize a set of three guidelines that inform DSR in the rising era of GenAI. These guidelines support researchers in designing and justifying GenAI-related DSR processes and in precisely articulating the theoretical grounding of their design decisions and evaluation strategies.}}, author = {{zur Heiden, Philipp and Beverungen, Daniel and Bartelheimer, Christian and Breidbach, Christoph}}, booktitle = {{Lecture Notes in Computer Science}}, isbn = {{9783032283122}}, issn = {{0302-9743}}, location = {{Muenster}}, publisher = {{Springer Nature Switzerland}}, title = {{{Design Science Research in an Era of Generative AI—Challenges and Theoretical Guidelines}}}, doi = {{10.1007/978-3-032-28313-9_22}}, volume = {{16606}}, year = {{2026}}, } @article{62957, author = {{Elsner, Julia and Tenberge, Claudia and Fechner, Sabine}}, journal = {{Zeitschrift für Didaktik der Naturwissenschaften}}, number = {{1}}, pages = {{1--17}}, title = {{{Modellieren und Denken im Diskontinuum}}}, doi = {{10.1007/s40573-026-00194-1}}, volume = {{32}}, year = {{2026}}, } @article{65776, abstract = {{This paper investigates the potential impacts of digitalisation on society and democratic governance through the construction of four realist science fiction scenarios. The study aims to delineate desirable and undesirable digital futures to inform policy discourse and strategic planning. It begins with the outlining of the research basis and methodology, where it employs a methodological synthesis of the Scenario Development Technique from the UN Strategic Foresight Guide and STEEP Analysis. This approach integrates a macro environmental assessment of socio-cultural, technological, economic, environmental, and political dimensions to identify key drivers of change and differences. These are then mapped onto a two-by-two matrix defined by two primary axes. This combination enabled the development of four scenarios examining the impact of digital technologies across these dimensions. The scenarios diverge along two axes. The vertical axis represents the mode of societal organisation and political power (authoritarianism versus democracy). The horizontal axis represents the mode of governance and citizen engagement (representation versus participation). By contrasting these divergent paths, this paper provides a critical framework for analysing how digital technologies intersect with political will and socioeconomic structures.}}, author = {{Fuchs, Christian and Museba, Joel and Friesch, Kevin}}, issn = {{2732-5121}}, journal = {{Open Research Europe}}, publisher = {{F1000 Research Ltd}}, title = {{{The Futures of Digital Democracy: Four Scenarios}}}, doi = {{10.12688/openreseurope.22910.2}}, volume = {{6}}, year = {{2026}}, } @article{65585, abstract = {{This article explores the relativity of Islamic normativity through the taṣwīb doctrine (kullu mujtahid muṣīb) as formulated by al-ʿAnbarī and received by al-Jāḥiẓ (d. 255/869), al-Jaṣṣāṣ (d. 370/981), and al-Baṣrī (d. 436/1044). Al-Jaṣṣāṣ reinterprets the thesis through the ḥanafī principle of ashbah bi-l-aṣl as a hermeneutical-methodological approach; al-Baṣrī elaborates it into an epistemo-logical model of normative plurality, while al-Jāḥiẓ articulates a soteriological theory of moral responsibility in the context of kalām. The analysis shows that classical Islamic legal theory developed a distinct modelof normativity that maintains binding force under conditions of pluralism and uncertainty. The article calls for renewed engagement with this tradition in contemporary debates on religious normativity and legal pluralism.}}, author = {{Abdelrahem, Mohammed}}, issn = {{2941-122X}}, journal = {{Forum Islamic-Theological Studies}}, keywords = {{IslamicTheology, Usul al-Fiqh, taswib, islamische Rechtsphilosophie, LegalTheory, Pluralism, OpenAccess}}, number = {{1}}, pages = {{94--111}}, publisher = {{LibreCat University}}, title = {{{Zur Relativität islamischer Normativität: Diskurslinien der taṣwīb-Lehre von al-Ǧāḥiẓ (gest. 869) zu al-Ǧaṣṣāṣ (gest. 981) und al-Baṣrī (gest. 1044) }}}, doi = {{10.71573/2941-122X_2026_5-1_154}}, volume = {{Vol. 5 (2026)}}, year = {{2026}}, } @article{65767, author = {{Houari, Fadoua and Caylak, Ismail and Ostwald, Richard}}, issn = {{0167-6636}}, journal = {{Mechanics of Materials}}, publisher = {{Elsevier BV}}, title = {{{A verification-stability-validation framework for optimal hyperelastic modeling of rubber-like materials}}}, doi = {{10.1016/j.mechmat.2026.105740}}, volume = {{220}}, year = {{2026}}, } @article{65673, abstract = {{Subject of this paper is the investigation of the influence of local joint kinematics on the load-bearing and failure behavior of self- piercing riveted (SPR) joints. It can be shown that the local joint kinematics of SPR joints correlate with the failure mechanism of the joint. The kinematics are highly influenced by the material properties of the joining partners. Detailed experimental results from tensile tests on a representative SPR joint are presented, with local joint kinematics quantified using multiple complementary measurement methods (optical measurement, micrographs, in situ computer tomography). Furthermore, results of component tests are shown where the kinematics of the joints have been measured in the same manner. The experimental results are later used to calibrate simulation models for crash application which are used to simulate the specimen and component tests. The results of the investigation show that the local joint kinematic influences the failure behavior of the joint. Simulations of the experimental tests have shown good results, and the investigated models are able to predict the actual joint behavior.}}, author = {{Bähr, Philipp and Striewe, Marius and Dargel, Alrik and Sommer, Silke and Hein, David 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 = {{{Experimental investigation of local joining element kinematics in mechanical joints and surrogate modelling for crash applications}}}, doi = {{10.1177/14644207261420657}}, year = {{2026}}, } @article{65821, author = {{Gräßler, Iris and Rarbach, Sven and Pottebaum, Jens and Luessen, Florian and Hoffmann, Joerg}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{587--592}}, publisher = {{Elsevier BV}}, title = {{{Metadata Model for Engineering of Sustainable Products in Value Creation Networks}}}, doi = {{10.1016/j.procir.2026.05.099}}, volume = {{140}}, year = {{2026}}, } @article{65820, author = {{Gräßler, Iris and Rarbach, Sven and Pottebaum, Jens and Hoffmann, Joerg}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, pages = {{245--250}}, publisher = {{Elsevier BV}}, title = {{{Metadata-based assessment of Data Quality for Engineering of Sustainable Products}}}, doi = {{10.1016/j.procir.2026.05.255}}, volume = {{142}}, year = {{2026}}, } @article{65823, abstract = {{ABSTRACT Additive manufacturing by laser powder bed fusion enables complex AlSi10Mg components but produces a heterogeneous microstructure prone to localized corrosion. In this study, hydrophobic polydimethylsiloxane (PDMS) ultrathin films, with and without an SiO ₓ interlayer attached by chemical vapor deposition (CVD), were applied for corrosion mitigation. Surface modifications were characterized by X‐ray photoelectron spectroscopy (XPS), polarization modulation–infrared reflection–absorption spectroscopy (PM‐IRRAS) and water contact angle (WCA) measurements. Electrochemical behavior was evaluated by electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and chronoamperometry by a droplet‐cell approach. Atmospheric corrosion processes simulating marine corrosion were monitored by optical microscopy. Spectroscopic analyses confirm successful PDMS attachment. Electrochemical measurements reveal reduced corrosion current densities by one magnitude, suppressed pitting activity, and anodic shifts of the pitting potential. The SiO ₓ ‐CVD + PDMS bilayer exhibits the highest resistance to atmospheric corrosion. }}, author = {{Prüßner, Tim and Hoyer, Kay-Peter and Buitkamp, Nadine and Grundmeier, Guido}}, issn = {{0947-5117}}, journal = {{Materials and Corrosion}}, publisher = {{Wiley}}, title = {{{Atmospheric Corrosion Protection of LPBF Manufactured AlSi10Mg by Combining SiO x ‐CVD and PDMS Grafting}}}, doi = {{10.1002/maco.70163}}, year = {{2026}}, } @inproceedings{65827, author = {{Sänger, Niklas}}, location = {{Helsinki}}, title = {{{Bridging Academic and Vocational Knowledge: Professionalization in Vocational Teacher Education}}}, year = {{2026}}, } @article{65476, abstract = {{Service research has evolved into an interdisciplinary research field that bridges diverse disciplines, including information systems (IS) and marketing. Nearly two decades ago, the service system concept was introduced as a foundational abstraction in service research, drawing on ideas from the service-dominant logic (S-D logic) of marketing. Despite its widespread adoption in service research, particularly in the IS discipline, the service system concept lacks a solid theoretical foundation. This has resulted in conceptual ambiguity and overlap with related constructs, such as service ecosystems. Moreover, it has largely remained a static analytical lens, insufficiently capturing dynamic service phenomena, including value co-creation and co-destruction, as well as the emergence of institutional arrangements. To address these limitations, we propose Luhmann’s systems theory (LST) as a robust framework for conceptualizing service systems as autopoietic (self-creating) systems, in which communication serves as the fundamental mechanism that drives value co-creation. We derive five theoretical propositions from this re-conceptualization that clarify conceptual ambiguity and allow researchers to explore dynamic service phenomena in greater depth. Given LST’s general approach, our conceptualization provides a theoretically grounded, interdisciplinary foundation for advancing service research.}}, author = {{Beverungen, Daniel and Poeppelbuss, Jens and Hemmrich, Simon and Iqbal, Taskeen}}, issn = {{1019-6781}}, journal = {{Electronic Markets}}, keywords = {{Service system, Service ecosystem, Systems theory, Service research}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Service through communication—Conceptualizing service systems with Luhmann’s systems theory}}}, doi = {{10.1007/s12525-026-00889-w}}, volume = {{36}}, year = {{2026}}, } @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}}, } @article{65615, abstract = {{Self-piercing riveting (SPR) is a well-established joining technique in lightweight construction, as it enables the joining of different materials without requiring pre-drilling. However, the necessary adaptation of the rivet-die combination to the respective material and thickness combinations requires a large number of specific tool sets, which significantly limits the process's flexibility. To overcome these limitations, the versatile self-piercing riveting (V-SPR) was developed, which features enhanced punch actuation in combination with a multi-range-capable rivet . In this context, the concept of a movable die was introduced, which enables an extended process window and adaptable joint formation. Kappe et al. presented initial studies demonstrating the potential of this approach . However, a detailed numerical understanding of the underlying mechanisms remains lacking. This paper presents a numerical analysis of V-SPR with a movable die using a finite element (FE) model. The model includes deformable rivets, sheet metal materials and a kinematically controlled die with adjustable movement. A parameter study was conducted to analyse the influence of die movement on the material flow of the rivet and sheets, as well as joint formation. The simulations were validated using selected experimental data. The goal is to compare the joint geometries achieved with fixed and moving dies and expand the process windows of VSPR. The results demonstrate that the movable-die concept significantly enhances the material flow of both the sheets and the rivet, resulting in a noticeably larger and more reliable interlock than what is achievable with V-SPR using a fixed die. The numerical analyses support the observations reported by Kappe et al. and extend them by providing a quantitative description of how die displacement influences the resulting interlock size. Moreover, the ability to precisely control the die movement makes it possible to join challenging sheet-metal combinations that are difficult to process with conventional setups, particularly in cases involving thicker sheet materials.}}, author = {{Kaimann, Pia Katharina and Bobbert, Mathias and Meschut, Gerson}}, issn = {{1662-9752}}, journal = {{Materials Science Forum}}, pages = {{149--160}}, publisher = {{Trans Tech Publications, Ltd.}}, title = {{{Numerical Analysis of the Influence of a Movable Die on Joint Formation in Versatile Self-Piercing Riveting}}}, doi = {{10.4028/p-8jkha8}}, volume = {{1185}}, year = {{2026}}, } @inbook{65689, abstract = {{The use of aluminium materials in the structural and bodywork areas of assemblies has proven to be a targeted option for lightweight design. How-ever, the reliable and cost-efficient joining of aluminium components remains a challenge. Mechanical joining methods, such as riveting, are frequently used in the automotive and aerospace construction industries. Rivets are made from heat-treated steels. Compared to steel, the use of aluminium materials for fasten-ers offers several advantages in terms of joining properties, particularly in terms of recyclability, corrosion resistance and reduced weight of the joined structure. Additionally, the manufacturing process is shorter since aluminium fasteners do not require coating. However, aluminium rivets can often not be used due to the insufficient mechanical strength of the fastener material in relation to the joining component materials. This study systematically investigates the requirements for using solid alu-minium self-piercing rivets. The influence of rivet geometry adjustments on the joint quality is analysed using numerical simulation. The results are used to derive and evaluate an optimised rivet geometry for joining pure aluminium sheets. On this basis, solid self-drilling rivets with optimised geometry are manufactured from particle-reinforced aluminium produced in a continuous extrusion process by machining. The integration of particles increases the material’s strength. Exper-imental tests are conducted to evaluate the use of optimised solid self-piercing rivets. The quality-relevant parameters are determined and evaluated based on macrographs of the joints.}}, author = {{Koch, Steffen and Weber, Joshua and Meschut, Gerson and Stadelmann, Claudia and Böhm, Wolfgang and Merklein, Marion}}, booktitle = {{Proceedings in Engineering Mechanics}}, isbn = {{9783032236401}}, issn = {{2731-0221}}, keywords = {{Solid self-piercing riveting cdot particle-reinforced aluminium cdot continuous powder extrusion cdot Joining technology cdot Rivet geometry cdot lightweight design}}, location = {{Coimbra}}, publisher = {{Springer Nature Switzerland}}, title = {{{Particle-Reinforced Aluminium Solid Self-piercing Rivets for Joining Aluminium Alloy Sheets}}}, doi = {{10.1007/978-3-032-23641-8_1}}, year = {{2026}}, }