@inproceedings{59154,
  abstract     = {{<jats:p>Abstract. Lightweight design is one of the central topics of the automotive industry since reducing mass can save emissions over the entire life cycle of a component. Nowadays, vehicle structures usually consist of a multi-material design, which poses the additional challenge of joining these different materials. Mechanical joining is the most common way of joining different types of materials. Cast aluminium alloys of the AlSi system have a low ductility, which causes cracks during the mechanical joining process in the joint. One research approach is to achieve a fine microstructure by influencing the solidification rate since this results in increased mechanical properties, specifically the elongation at fracture and yield strength. A very fine microstructure can be achieved by utilizing Twin-roll casting (TRC) which is a continuous casting process in which high solidification rates of more than 100 K/s occur. In this study, the hypoeutectic cast aluminium alloy AlSi9 is processed in the TRC process using copper rollers. The cast strips are investigated regarding the microstructure-property correlation. A variation of the roller materials and cooling conditions allows for an increase in the solidification rate, whereby a defined, fine microstructure can be achieved, which enhances the mechanical properties of the hypoeutectic aluminium casting alloys.</jats:p>}},
  author       = {{Neuser, Moritz and Hoyer, Kay-Peter and Schaper, Mirko}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Processing of the hypoeutectic AlSi9 alloy with twin-roll casting by using copper shells}}},
  doi          = {{10.21741/9781644903551-26}},
  volume       = {{52}},
  year         = {{2025}},
}

@inproceedings{59155,
  abstract     = {{<jats:p>Abstract. Twin-Roll-Casting (TRC) is an energy- and cost-efficient process to produce near-net-shape aluminum strips. Due to the high affinity of molten aluminum to steel surfaces, those rollers show signs of wear throughout the rolling campaign. This leads to the necessity of restoring the worn surfaces to suitable parameters. The easiest way is to grind the surface till all superficial defects are omitted. However, the thickness of the roller is not endless, therefore the rollers must be replaced after a certain amount of surface reconditioning. This ultimately leads to the non-usability of the roller. This research shows a route to recondition the surface including the possibility of renewing worn-down surfaces with an energy- and cost-efficient high-velocity oxygen fuel (HVOF) treatment with subsequent grinding to the desired initial surface parameters.</jats:p>}},
  author       = {{Lauth, Martin and Hoyer, Kay-Peter and Schaper, Mirko and Gräfen, Winfried}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Cost-effective repair solution for twin-roll-caster rollers}}},
  doi          = {{10.21741/9781644903551-5}},
  volume       = {{52}},
  year         = {{2025}},
}

@article{59130,
  author       = {{Kleinschmidt, Dennis and Brüning, Florian}},
  journal      = {{KGK Kautschuk Gummi Kunststoffe}},
  keywords     = {{Rheologie, Viskosität, Wandgleiten}},
  title        = {{{Influence of pre-shearing on the rheological properties of filled rubber compounds}}},
  year         = {{2025}},
}

@inproceedings{59222,
  author       = {{Grigoryan, Khoren and Martin, Lucas and Fichtler, Timm and Reinhold, Jannik and Asmar, Laban and Kühn, Arno and Dumitrescu, Roman}},
  booktitle    = {{Vorausschau und Technologieplanung - 18. Symposium für Vorausschau und Technologieplanung}},
  editor       = {{Dumitrescu, Roman and Hölzle, Katharina}},
  location     = {{Berlin}},
  publisher    = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts}},
  title        = {{{Leitfaden zur Planung von Datenanalysen zur Entscheidungsunterstützung im Produktmanagement}}},
  year         = {{2025}},
}

@inbook{59217,
  abstract     = {{In the face of climate change and growing sustainability awareness, industrial companies are at a pivotal point in transforming from a linear to a circular economy (CE) model. Yet, aligning their business with the principles of the CE is a challenging task. Utilizing a systematic literature review (SLR) and thematic analysis a framework for the business transformation towards the CE has been developed. It considers the dimensions product, business strategy, corporate management, and value chain. The circular business transformation (CBT) framework includes incentives for entering the CE, fields of action, design options, and associated challenges. For researchers, it provides a comprehensive overview and serves as a basis for in-depth studies of each dimension of CBT. Furthermore, it acts as a practical guide that enables industrial companies to strategically navigate through the complexity of the CBT and to effectively design it.}},
  author       = {{Rasor, Anja and Petzke, Lisa Irene and Scholtysik, Michel and Koldewey, Christian and Dumitrescu, Roman}},
  booktitle    = {{Springer Proceedings in Business and Economics}},
  isbn         = {{9783031724893}},
  issn         = {{2198-7246}},
  keywords     = {{Circular Economy, Circularity, Holistic View, Circular Transformation, Circular Management}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Framework for the Business Transformation Towards the Circular Economy: A Systematic Literature Review}}},
  doi          = {{10.1007/978-3-031-72490-9_18}},
  year         = {{2025}},
}

@article{59276,
  abstract     = {{Stress plays a crucial role in thin films and layered systems, and thus significantly influences the material's electrical, mechanical and (nonlinear) optical responses. Despite lithium niobate's wide applicability as a nonlinear optical material, the impact of mechanical stress on its nonlinear optical properties is not well characterized. In this work, we systematically study both experimentally and theoretically, the nonlinear optical responses of thin film lithium niobate (TFLN) single crystals. Compressive and tensile stress is applied in our experiment using a piezodriven strain cell. We then record the second-harmonic-generated (SHG) response in back-reflection geometry, and compare these results to theoretical modeling using density functional theory (DFT). Both methods consistently reveal that uniaxial stress induces changes of the nonlinear optical susceptibility of certain tensor elements on the order of up to 1 pm/(V GPa). The exact value depends on the tensor element that is addressed in our SHG analysis, on the crystal orientation, and also whether using compressive or tensile stresses. Furthermore, a lowering of the crystal symmetry when applying stress along the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>x</a:mi></a:math> or <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>y</b:mi></b:math> crystallographic axes is observed by the appearance of new nonlinear optical tensor elements within the strained crystals.}},
  author       = {{Pionteck, Mike N. and Roeper, Matthias and Koppitz, Boris and Seddon, Samuel D. and Rüsing, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Sanna, Simone and Eng, Lukas M.}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{6}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films}}},
  doi          = {{10.1103/physrevb.111.064109}},
  volume       = {{111}},
  year         = {{2025}},
}

@article{60174,
  abstract     = {{<jats:p>Fähigkeiten zur Wahrnehmung und Regulation von Emotionen sind von besonderer Relevanz für Studierende, da Fördermaßnahmen im Bereich der Emotionsregulation auch positive Effekte auf die Studienqualität, den Studienerfolg und die allgemeine Persönlichkeitsentwicklung haben können. Jedoch wird diesem Thema wenig Aufmerksamkeit geschenkt und hochschuldidaktisch steht die Gestaltung von kognitiven und inhaltsbezogenen Lernarrangements im Zentrum. Die Einbindung von Gelegenheiten zur Emotionsreflexion in die Lehre bietet eine niederschwellige Maßnahme zur Förderung emotionaler Kompetenzen, weshalb im vorliegenden Beitrag ein Instrument zur Umsetzung dieser Aufgabe vorgeschlagen wird.</jats:p>}},
  author       = {{Lehberger, Regine}},
  issn         = {{2219-6994}},
  journal      = {{Zeitschrift für Hochschulentwicklung}},
  keywords     = {{Emotionsreflexion, Studierende, Hochschullehre, Reflexion}},
  number       = {{1}},
  publisher    = {{OAPublishing Collective}},
  title        = {{{Emotionsreflexion als Element universitären Lehrens und Lernens Emotional reflection as an element of university teaching and learning}}},
  doi          = {{10.21240/zfhe/20-1/22}},
  volume       = {{20}},
  year         = {{2025}},
}

@inproceedings{60281,
  author       = {{Güldenpenning, Iris and Jackson, Robin C. and Weigelt, Matthias}},
  booktitle    = {{57. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (ASP)}},
  editor       = {{Kullik, Lisa and Birnkraut, Tim and Kellmann, Michael}},
  location     = {{Bochum}},
  title        = {{{The influence of action outcome probability and expertise on the size of the head-fake effect in basketball}}},
  year         = {{2025}},
}

@inproceedings{60133,
  author       = {{Böer, Nils Tobias and Güldenpenning, Iris and Weigelt, Matthias}},
  booktitle    = {{57. Jahrestagung der Arbeitsgemeinschaft für Sportpsychologie (ASP)}},
  editor       = {{Kullik, Lisa and Birnkraut, Tim and Kellmann, Michael}},
  location     = {{Bochum}},
  pages        = {{105}},
  title        = {{{Differences of producing head fakes with and without a social partner}}},
  year         = {{2025}},
}

@inbook{60344,
  author       = {{Reis, Oliver}},
  booktitle    = {{Scholarship of Teaching and Learning und disziplinäre Forschung: Eine komplexe Beziehung,}},
  editor       = {{Bohnsack, Carla }},
  isbn         = {{978-3-658-47907-7}},
  publisher    = {{Springer}},
  title        = {{{SoTL und Forschung in der Religionspädagogik: Eine exemplarische Analyse des Zusammenhangs von Fach und der Beforschung von Fachlehre}}},
  doi          = {{10.1007/978-3-658-47908-4_16}},
  year         = {{2025}},
}

@inproceedings{60343,
  author       = {{Wehde, Janis}},
  location     = {{Frankfurt a.M.}},
  title        = {{{Konzept und Wirkungen eines Lehrmoduls zur demokratischen Erarbeitung von Beurteilungskriterien in bildungswissenschaftlichen Seminaren des Lehramtsstudiums}}},
  year         = {{2025}},
}

@article{54673,
  abstract     = {{The article resulted in Christian Fuchs being awarded Communication and the Public’s Award for Excellence. }},
  author       = {{Fuchs, Christian}},
  journal      = {{Communication and the Public}},
  number       = {{2}},
  pages        = {{125--142}},
  title        = {{{A New Framework for the Analysis of Media Systems and Media Organisations}}},
  doi          = {{10.1177/20570473241259195 }},
  volume       = {{10}},
  year         = {{2025}},
}

@inproceedings{60290,
  abstract     = {{The constantly increasing demand for climate protection and resource conservation requires innovative and versatile joining processes that improve adaptability to the joining task and robustness to enable flexible manufacturing on a production line. Therefore, the versatile SPR (V-SPR) and tumbling SPR (T-SPR) were developed. Using the example of a mixed material combination HCT590X+Z (t0 = 1.0 mm) / EN AW-6014 T4 (t0 = 2.0 mm), these processes were examined and compared with regard to the binding mechanisms form closure and force closure using micrographs, non-destructive resistance measurements and destructive torsion tests. For this purpose, a new sample geometry was defined, and the methods were adapted to the SPR process variants.</jats:p>}},
  author       = {{Lüder, Stephan and Holtkamp, Pia Katharina and Wituschek, Simon and Bobbert, Mathias and Meschut, Gerson and Lechner, Michael and Schmale, Hans Christian}},
  booktitle    = {{Materials Research Proceedings}},
  editor       = {{Meschut, Gerson and Bobbert, Mathias and Duflou, Joost and Fratini, Livan and Hagenah, Hinnerk and Martins, Paulo A. F. and Merklein, Marion and Micari, Fabrizio}},
  issn         = {{2474-395X}},
  keywords     = {{Joining, Self-Piercing Riveting, Sheet Metal}},
  location     = {{Paderborn}},
  pages        = {{101 -- 108}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Analysis of the binding mechanisms depending on versatile process variants of self-piercing riveting}}},
  doi          = {{10.21741/9781644903551-13}},
  volume       = {{52}},
  year         = {{2025}},
}

@article{60441,
  abstract     = {{Conventional mechanical joining processes are typically rigid in their tool systems and can only react to changing process and disturbance variables to a limited extent. At the same time, various industries are increasingly trending towards multi-material systems consisting of parts with varying geometric and mechanical properties. Due to the varying properties, rigid mechanical joining processes require sampling procedures and periodic changes of tool components or auxiliary joining parts. Consequently, research is focusing on versatile mechanical joining processes that allow increased control by modifying the process parameters. Two processes based on self-piercing riveting can achieve a significant increase in process influence possibilities through a multi-linear actuator as versatile self-piercing riveting (V-SPR) and a tumbling superimposed actuator as tumbling self-piercing riveting (T-SPR). Initial research into V-SPR has shown that this process can be used to achieve a higher variation in overall package thickness by adapting the rivet geometry and using multiple linear actuators. The T-SPR process also enables increased material flow control by means of targeted compression of the rivet using the tumbling actuator, thereby extending the range of joints that can be manufactured. Based on these two processes, a combination of the two mechanisms of action is to be developed.}},
  author       = {{Holtkamp, Pia Katharina and Wituschek, Simon and Lechner, Michael and Meschut, Gerson}},
  issn         = {{2261-236X}},
  journal      = {{MATEC Web of Conferences}},
  publisher    = {{EDP Sciences}},
  title        = {{{Integration of multiple-linear and tumbling kinematics into self-piercing riveting}}},
  doi          = {{10.1051/matecconf/202540801069}},
  volume       = {{408}},
  year         = {{2025}},
}

@inproceedings{60439,
  abstract     = {{Abstract. Mechanical joints are traditionally analyzed through destructive micrograph analysis, which may compromise internal geometry and morphology, as evidenced by radial cracks in semi-tubular self-pierce riveting. In contrast, industrial X-ray computed tomography (XCT) offers a non-destructive method for component diagnosis, providing volumetric insights without damaging the sample and enabling dimensional measurement. The DFG-funded Collaborative Research Center TRR 285 is exploring XCT's application in assessing mechanical joinability across various joining processes and materials, particularly in multi-material systems like steel-aluminum joints. XCT faces challenges in accurately capturing multi-material compositions, leading to artifacts that complicate interface detection. This research aims to validate XCT for joint investigations, yielding quantitative characteristics that surpass those from traditional micrograph analysis.}},
  author       = {{Lechner, M. and Borgert, Thomas and Busch, Matthias and Harms, A. and Holtkamp, Pia Katharina and Römisch, D. and Wituschek, Simon and Kappe, Fabian}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Non-destructive testing in versatile joining processes}}},
  doi          = {{10.21741/9781644903551-12}},
  volume       = {{52}},
  year         = {{2025}},
}

@article{53805,
  abstract     = {{The article introduces a method to learn dynamical systems that are governed by Euler–Lagrange equations from data. The method is based on Gaussian process regression and identifies continuous or discrete Lagrangians and is, therefore, structure preserving by design. A rigorous proof of convergence as the distance between observation data points converges to zero and lower bounds for convergence rates are provided. Next to convergence guarantees, the method allows for quantification of model uncertainty, which can provide a basis of adaptive sampling techniques. We provide efficient uncertainty quantification of any observable that is linear in the Lagrangian, including of Hamiltonian functions (energy) and symplectic structures, which is of interest in the context of system identification. The article overcomes major practical and theoretical difficulties related to the ill-posedness of the identification task of (discrete) Lagrangians through a careful design of geometric regularisation strategies and through an exploit of a relation to convex minimisation problems in reproducing kernel Hilbert spaces.}},
  author       = {{Offen, Christian}},
  journal      = {{Mathematics of Computation}},
  publisher    = {{American Mathematical Society}},
  title        = {{{Machine learning of continuous and discrete variational ODEs with convergence guarantee and uncertainty quantification}}},
  doi          = {{10.1090/mcom/4120}},
  year         = {{2025}},
}

@inproceedings{60494,
  abstract     = {{Pillow-plate heat exchangers (PPHEs) represent a viable alternative to conventional shell-and-tube and plate heat exchangers. The waviness of their channels intensifies fluid mixing in the boundary layers and facilitates heat transfer. Applying secondary surface structuring can further enhance the overall thermo-hydraulic performance of PPHEs, thus increasing their competitiveness against conventional heat exchangers. In this work, streamlined secondary structures applied on the PPHE surface were studied numerically to explore their potential in enhancing near-wall fluid mixing. Computational fluid dynamics (CFD) simulations of single-phase turbulent flow in the inner PPHE channel were performed and pressure drop, heat transfer coefficients, and overall thermo-hydraulic efficiency were determined. The simulation results clearly demonstrate a favourable influence of secondary structuring on the heat transfer performance of PPHEs.</jats:p>}},
  author       = {{Afsahnoudeh, Reza and Riese, Julia and Kenig, Eugeny Y.}},
  booktitle    = {{Systems and Control Transactions}},
  issn         = {{2818-4734}},
  publisher    = {{PSE Press}},
  title        = {{{Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Streamlined Secondary Structures: A Numerical Analysis}}},
  doi          = {{10.69997/sct.178665}},
  volume       = {{4}},
  year         = {{2025}},
}

@inproceedings{60493,
  abstract     = {{Heat pumps play a crucial role in decarbonizing the chemical industry. The integration and sizing of heat pumps in chemical processes is a challenging task in multi-product chemical processes due to the fluctuating waste heat supply and heat demand. Integrating heat pumps may require a retrofit of the utility system. Mathematical optimization is a useful tool to tackle this challenge by enabling the analysis of correlation between relevant system parameters and equipment sizing. This study demonstrates the utilization of mathematical optimization and parameter studies for utility system equipment sizing addressing fluctuating heat supply and demand profiles.</jats:p>}},
  author       = {{Hochhaus, Thorben and Wloch, Johannes and Grünewald, Marcus and Riese, Julia}},
  booktitle    = {{Systems and Control Transactions}},
  issn         = {{2818-4734}},
  publisher    = {{PSE Press}},
  title        = {{{A Data-Driven Conceptual Approach to Heat Pump Sizing in Chemical Processes with Fluctuating Heat Supply and Demand}}},
  doi          = {{10.69997/sct.196662}},
  volume       = {{4}},
  year         = {{2025}},
}

@inproceedings{60497,
  abstract     = {{Despite the advantages that the virtual knowledge graph paradigm has brought to many application domains, state-of-the-art systems still do not support popular graph database management systems like Neo4j. Their query rewriting algorithms focus on languages like conjunctive queries and their unions, which were developed for relational data and are poorly suited for graph data. Moreover, they also limit the expressiveness of the ontology languages that admit rewritings, restricting them to those that enjoy the so-called FO-rewritability property. Rewritings have thus focused on the DL-Lite family of Description Logics. In this paper, we propose a technique for rewriting a family of navigational queries for a suitably tailored fragment of ELHI. Leveraging navigational features in the target query language, we can include some widely-used axiom shapes not supported by DL-Lite. We implemented a proof-of-concept prototype that rewrites into Cypher queries, and tested it on a real-world cognitive neuroscience use case with promising results.}},
  author       = {{Löhnert, Bianca and Augsten, Nikolaus and Okulmus, Cem and Ortiz, Magdalena}},
  booktitle    = {{The Semantic Web - 22nd European Semantic Web Conference, {ESWC} 2025, Portoroz, Slovenia, June 1-5, 2025, Proceedings, Part {I}}},
  isbn         = {{9783031945748}},
  issn         = {{0302-9743}},
  keywords     = {{Ontology-based Data Access, Property Graphs, Navigational Queries}},
  location     = {{Portorož, Slovenia}},
  pages        = {{342----361}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Towards Practicable Algorithms for Rewriting Graph Queries Beyond DL-Lite}}},
  doi          = {{10.1007/978-3-031-94575-5_19}},
  volume       = {{15718}},
  year         = {{2025}},
}

@article{59163,
  abstract     = {{While existing studies have extensively explored various facets of international students’ experiences, a gap remains in understanding the connection between their social capital accumulation and information-seeking practices that shape the incoming students’ extended transition process. Successful information-seeking is not solely related to academic outcome; it is also influenced by the social capital resources available within and beyond familiar cultural groups. This article sheds light on how international students’ social capital accumulation shapes their information searches across various online and offline social networks. A total of ten international students were interviewed at the beginning and the end of their first semester in Germany during the 2022–23 academic year. The findings demonstrate that the incoming students’ information-seeking strategies and social capital accumulation change over time. The students rely on their previously established social connections offline and online when preparing for their departure. Upon arrival in Germany, the students continue to search for information within their linguistic and cultural familiar groups, but their information-seeking process shifts to local in-person contexts. During the semester, lecturers and fellow students become useful information sources at the university while the students develop confidence in their foreign language skills.</jats:p>}},
  author       = {{Teichert, Jeannine and Lin-Januszewski, Liang-Wen}},
  issn         = {{2397-7140}},
  journal      = {{Transitions: Journal of Transient Migration}},
  publisher    = {{Intellect}},
  title        = {{{Linking social capital accumulation and information-seeking practices of international students in Germany}}},
  doi          = {{10.1386/tjtm_00071_1}},
  year         = {{2025}},
}