@article{34198, author = {{Bloh, Thiemo and Caruso, Carina}}, journal = {{die hochschullehre}}, title = {{{Ein kritisch-multiperspektivischer Blick auf Forschendes Lernen in der Lehrkräftebildung. Fragen, Erwägungen und Rekonstruktionen.}}}, doi = {{10.3278/HSL2221W}}, volume = {{8}}, year = {{2022}}, } @article{34199, author = {{Bloh, Thiemo}}, journal = {{Zeitschrift für Pädagogik}}, number = {{6}}, pages = {{749--762}}, title = {{{Grundlagentheoretische Differenzen in der Lehrkräftekooperationsforschung}}}, doi = {{10.3262/ZP2206749}}, volume = {{68}}, year = {{2022}}, } @article{34207, abstract = {{AlSi casting alloys combine excellent castability with high strength. Hence, this group of alloys is often used in the automotive sector. The challenge for this application is the brittle character of these alloys which leads to cracks during joint formation when mechanical joining technologies are used. A rise in ductility can be achieved by a considerable increase in the solidification rate which results in grain refinement. High solidification rates can be realized in twin–roll casting (TRC) by water-cooled rolls. Therefore, a hypoeutectic EN AC–AlSi9 (for European Norm - aluminum cast product) is manufactured by the TRC process and analyzed. Subsequently, joining investigations are performed on castings in as-cast and heat-treated condition using the self-piercing riveting process considering the joint formation and the load-bearing capacity. Due to the fine microstructure, the crack initiation can be avoided during joining, while maintaining the joining parameters, especially by specimens in heat treatment conditions. Furthermore, due to the extremely fine microstructure, the load-bearing capacity of the joint can be significantly increased in terms of the maximum load-bearing force and the energy absorbed.}}, author = {{Neuser, Moritz and Kappe, Fabian and Ostermeier, Jakob and Krüger, Jan Tobias and Bobbert, Mathias and Meschut, Gerson and Schaper, Mirko and Grydin, Olexandr}}, issn = {{1438-1656}}, journal = {{Advanced Engineering Materials}}, keywords = {{Condensed Matter Physics, General Materials Science}}, number = {{10}}, publisher = {{Wiley}}, title = {{{Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting}}}, doi = {{10.1002/adem.202200874}}, volume = {{24}}, year = {{2022}}, } @inproceedings{34203, author = {{Bloh, Thiemo}}, location = {{Paderborn}}, title = {{{Was bedeutet Post-Digitalität? – Universitäre Lehrpraktiken zwischen situativer Anforderung und habitueller Prägung}}}, year = {{2022}}, } @inproceedings{34201, author = {{Bloh, Thiemo}}, location = {{Oldenburg}}, title = {{{AussteigerInnen – Fluchtbewegungen in der LehrerInnenbiographie}}}, year = {{2022}}, } @inproceedings{34202, author = {{Bloh, Thiemo}}, location = {{Frankfurt a.M.}}, title = {{{„Referenzrahmen“ als gewinnbringendes Konstrukt im Kontext Dokumentarischer Evaluationsforschung!?}}}, year = {{2022}}, } @inproceedings{34204, author = {{Bloh, Thiemo}}, location = {{Paderborn}}, title = {{{The Deconstruction of Professionalism}}}, year = {{2022}}, } @inbook{34211, abstract = {{Nowadays, clinching is a widely used joining technique, where sheets are joined by pure deformation to create an interlock without the need for auxiliary parts. This leads to advantages such as reduced joining time and manufacturing costs. On the other hand, the joint strength solely relies on directed material deformation, which renders an accurate material modelling essential to reliably predict the joint forming. The formation of the joint locally involves large plastic strains and possibly complex non-proportional loading paths, as typical of many metal forming applications. Consequently, a finite plasticity formulation is utilised incorporating a Chaboche–Rousselier kinematic hardening law to capture the Bauschinger effect. Material parameters are identified from tension–compression tests on miniature spec- imens for the dual-phase steel HCT590X. The resulting material model is implemented in LS-Dyna to study the locally diverse loading paths and give a quantitative statement on the importance of kinematic hardening for clinching. It turns out that the Bauschinger effect mainly affects the springback of the sheets and has a smaller effect on the joint forming itself.}}, author = {{Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, keywords = {{Clinching, Material modelling, Kinematic hardening, Parameter identification, Bauschinger effect}}, publisher = {{Springer International Publishing}}, title = {{{Influence of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal}}}, doi = {{10.1007/978-3-031-06212-4_31}}, year = {{2022}}, } @article{34213, abstract = {{In this paper, a study based on experimental and numerical simulations is performed to analyze fatigue cracks in clinched joints. An experimental investigation is conducted to determine the failure modes of clinched joints under cyclic loading at different load amplitudes with single-lap shear tests. In addition, numerical FEM simulations of clinching process and subsequent shear loading are performed to support the experimental investigations by analyzing the state of stresses at the location of failure. An attempt is made to explain the location of crack initiation in the experiments using evaluation variables such as contact shear stress and maximum principal stress.}}, author = {{Ewenz, L. and Bielak, Christian Roman and Otroshi, Mortaza and Bobbert, Mathias and Meschut, Gerson and Zimmermann, M.}}, issn = {{0944-6524}}, journal = {{Production Engineering}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering}}, number = {{2-3}}, pages = {{305--313}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Numerical and experimental identification of fatigue crack initiation sites in clinched joints}}}, doi = {{10.1007/s11740-022-01124-z}}, volume = {{16}}, year = {{2022}}, } @inbook{34212, abstract = {{Force–displacement measurements and micrograph analyses are commonly used methods to validate numerical models of clinching processes. However, these methods often lead to resetting of elastic deformations and crack- closing after unloading. In contrast, the in situ computed tomography (CT) can provide three-dimensional images of the clinch point under loading conditions. In this paper, the potential of the in situ investigation of a clinching process as validation method is analyzed. For the in situ testing, a tailored test set-up featuring a beryllium cylinder for load-bearing and clinching tools made from ultra-high-strength titanium and Si3N4 are used. In the experiments, the clinching of two aluminum sheets is interrupted at specific process steps in order to perform the CT scans. It is shown that in situ CT visualizes the inner geometry of the joint at high precision and that this method is suitable to validate numerical models.}}, author = {{Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, keywords = {{Clinching, Non-destructive testing, Computed tomography, In situ CT}}, publisher = {{Springer International Publishing}}, title = {{{Clinching in In Situ CT—A Novel Validation Method for Mechanical Joining Processes}}}, doi = {{10.1007/978-3-031-06212-4_75}}, year = {{2022}}, } @article{34219, abstract = {{Resource-saving and sustainable production is becoming increasingly important regarding social, political and economic aspects, thus making the use of lightweight-construction technologies a current trend. For this reason, multi-material-systems made of high-strength steel and aluminium as well as metal and fibre-reinforced plastics gain in importance. However, different material properties, e.g. stiffness, thermal expansion coefficients or chemical incompatibilities, are challenging for conventional joining technologies. Joining by cold formed pin structures has shown to have high potential for joining multi-material-systems. These pins can be joined either by direct pin pressing into an unperforated joining partner or by caulking, where the pins are inserted through a pre-punched joining partner and the pin head is upset, resulting in a form-fit joint. Usually, cylindrical pins are used for joining. However, non-rotationally symmetrical pin geometries offer the possibility of introducing a predetermined breaking point or reinforcing a connection in the principal force direction. In this work, cylindrical pins as well as non-rotationally symmetrical pin geometries, such as polygonal and oval pin structures, are cold extruded from the sheet metal plane of an HCT590X+Z dual phase steel and joined in the next step with an EN AW-6014 aluminium using direct pin pressing. Since the formation of an undercut has an crucial influence on the joint strength, the investigations will be focused on the resulting joint geometry. In addition, the effect of different pin heights will be examined to analyse the joint formation at different levels of compression of the pin structures. Finally, the joints are evaluated regarding their joint strength in tensile shear tests and cross tension tests. Here the flow resistance of the geometry used as well as the pin height and thus the strain hardening of the pin base during the extrusion of the pins play a decisive role for the shear strength.}}, author = {{Römisch, David and Kraus, Martin and Merklein, Marion}}, issn = {{1464-4207}}, journal = {{Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}}, keywords = {{Mechanical Engineering, General Materials Science}}, number = {{6}}, pages = {{1187--1202}}, publisher = {{SAGE Publications}}, title = {{{Investigation of the influence of formed, non-rotationally symmetrical pin geometries and their effect on the joint quality of steel and aluminium sheets by direct pin pressing}}}, doi = {{10.1177/14644207221081408}}, volume = {{236}}, year = {{2022}}, } @article{34223, abstract = {{In this study, quasi-unidirectional continuous fiber reinforced thermoplastics (CFRTs) are joined with metal sheets via cold formed cylindrical, elliptical and polygonal pin structures which are directly pressed into the CFRT component after local infrared heating. In comparison to already available studies, the unique novelty is the use of non-rotational symmetric pin structures for the CFRT/metal hybrid joining. Thus, a variation in the fiber orientation in the CFRT component as well as a variation in the non-rotational symmetric pins’ orientation in relation to the sample orientation is conducted. The created samples are consequently mechanically tested via single lap shear experiments in a quasi-static state. Finally, the failure behavior of the single lap shear samples is investigated with the help of microscopic images and detailed photographs. In the single lap shear tests, it could be shown that non-rotational symmetric pin structures lead to an increase in maximum testing forces of up to 74% when compared to cylindrical pins. However, when normalized to the pin foot print related joint strength, only one polygonal pin variation showed increased joint strength in comparison to cylindrical pin structures. The investigation of the failure behavior showed two distinct failure modes. The first failure mode was failure of the CFRT component due to an exceedance of the maximum bearing strength of the pin-hole leading to significant damage in the CFRT component. The second failure mode was pin-deflection due to the applied testing load and a subsequent pin extraction from the CFRT component resulting in significantly less visible damage in the CFRT component. Generally, CFRT failure is more likely with a fiber orientation of 0° in relation to the load direction while pin extraction typically occurs with a fiber orientation of 90°. It is assumed that for future investigations, pin structures with an undercutting shape that creates an interlocking joint could counteract the tendency for pin-extraction and consequently lead to increased maximum joint strengths.}}, author = {{Popp, Julian and Römisch, David and Merklein, Marion and Drummer, Dietmar}}, issn = {{2076-3417}}, journal = {{Applied Sciences}}, keywords = {{Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science}}, number = {{10}}, publisher = {{MDPI AG}}, title = {{{Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures}}}, doi = {{10.3390/app12104962}}, volume = {{12}}, year = {{2022}}, } @article{34225, abstract = {{Thermoplastic composites (TPCs) are predestined for use in lightweight structures, especially for high-volume applications. In many cases, joining is a key factor for the successful application of TPCs in multi-material systems. Many joining processes for this material group are based on warm forming the joining zone. This results in a change of the local material structure characterised by modified fibre paths, as well as varying fibre contents, which significantly influences the load-bearing behaviour. During the forming process, many different phenomena occur simultaneously at different scales. In this paper, the deformation modes and flow mechanisms of TPCs during forming described in the literature are first analysed. Based on this, three different joining processes are investigated: embedding of inserts, moulding of contour joints, and hotclinching. In order to identify the phenomena occurring in each process and to describe the characteristic resulting material structure in the joining zones, micrographs as well as computed tomography (CT) analyses are performed for both individual process stages and final joining zones.}}, author = {{Troschitz, Juliane and Gröger, Benjamin and Würfel, Veit and Kupfer, Robert and Gude, Maik}}, issn = {{1996-1944}}, journal = {{Materials}}, number = {{15}}, publisher = {{MDPI AG}}, title = {{{Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation}}}, doi = {{10.3390/ma15155454}}, volume = {{15}}, year = {{2022}}, } @article{34221, abstract = {{Unter dem Begriff der Auflösung wird für gewöhnlich das kleinste messbare Merkmal eines Messsystems verstanden. In der dimensionellen Computertomografie hingegen haben sich in den vergangenen Jahren mehrere Auflösungskonzepte etabliert, die aufgrund der fehlenden Normung zueinander im Kontrast stehen. In diesem Beitrag werden die drei häufigsten Konzepte, die Voxelgröße, die Ortsauflösung und die metrologische Strukturauflösung in Kürze vorgestellt. Anschließend wird eine Abgrenzung zwischen den Konzepten getroffen und ein Integration der bestehenden Konzepte in ein gemeinsames Amplituden-Wellenlängen Diagramm diskutiert.}}, author = {{Binder, Felix and Hausotte, Tino}}, issn = {{2196-7113}}, journal = {{tm - Technisches Messen}}, keywords = {{Electrical and Electronic Engineering, Instrumentation}}, number = {{s1}}, pages = {{20--24}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Über die Abgrenzung von Auflösungskonzepten in der industriellen Computertomografie}}}, doi = {{10.1515/teme-2022-0065}}, volume = {{89}}, year = {{2022}}, } @article{34220, abstract = {{Die Erkennbarkeit von Rissen und geometrischen Qualitätskennwerten von Fügeverbindungen mittels Computertomografie ist von der Interfacestrukturauflösung abhängig, welche mittels geeigneter Prüfkörper untersucht wird. Die Reduktion von Abbildungsartefakten im Bereich von Bauteilzwischenräumen und -oberflächen verbessert deren dimensionelle Erfassbarkeit.}}, author = {{Busch, Matthias and Butzhammer, Lorenz and Hausotte, Tino}}, issn = {{2196-7113}}, journal = {{tm - Technisches Messen}}, keywords = {{Electrical and Electronic Engineering, Instrumentation}}, number = {{s1}}, pages = {{83--88}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Herausforderungen bei computertomografischen Untersuchungen von Fügeverbindungen}}}, doi = {{10.1515/teme-2022-0061}}, volume = {{89}}, year = {{2022}}, } @inproceedings{33519, author = {{Marx, Julian and Rieskamp, Jonas and Mirbabaie, Milad}}, booktitle = {{Proceedings of the 33rd Australasian Conference on Information Systems}}, location = {{Melbourne}}, title = {{{‘Just a Normal Day in the Metaverse’ – Distraction Conflicts of Knowledge Work in Virtual Environments}}}, year = {{2022}}, } @inproceedings{32247, author = {{Alshomary, Milad and Rieskamp, Jonas and Wachsmuth, Henning}}, booktitle = {{Proceedings of the 9th International Conference on Computational Models of Argument}}, pages = {{21 -- 31}}, title = {{{Generating Contrastive Snippets for Argument Search}}}, doi = {{http://dx.doi.org/10.3233/FAIA220138}}, year = {{2022}}, } @phdthesis{34272, abstract = {{Das Ultraschall-Dickdrahtbonden mit Aluminiumdraht ist ein Standardverfahren zur elektrischenKontaktierung von Leistungshalbleitermodulen. Die steigenden Anforderungen an die Effizienzund Zuverlässigkeit der Module haben zu technologischen Weiterentwicklungen geführt und eswerden vermehrt Kupferdrähte mit wesentlich besseren elektrischen und thermischen Eigenschafteneingesetzt. Hieraus resultieren durch höhere Prozesskräfte und Ultraschallleistung neueHerausforderungen bei der Prozessentwicklung; hierfür wird ein Simulationsmodell zur Verbesserungder Prozessentwicklung entwickelt.In Ultraschall-Drahtbondversuchen mit 400 m Aluminium und Kupfer Drähten wurde der Einflussder Prozessparameter auf die Bondqualität untersucht; diese Ergebnisse und zusätzliche Messungender Drahtdeformation und Schwingungen wurden für die Formulierung der Anforderungenund zur Validierung der Ergebnisse des Simulationsmodells genutzt.Es wurde ein Prozessmodell, basierend auf einer Co-Simulation zwischen MATLAB und ANSYS,entwickelt; hierbei wurden die phyiskalischen Phänomene wie die Ultraschall Werkstoffentfestigung,der Verbindungsaufbau und die dynamischen Systemeigenschaften abgebildet.Basierend auf einer Zug-Druck-Prüfmaschine wurde ein Prüfstand zur Identifikation der Modellparameterentwickelt. In zusätzlichen Druckversuchen mit den Bonddrähten mit und ohneUltraschallanregung wurde die Reduktion der Umformkräfte unter Ultraschalleinfluss untersucht.Mit dem entwickelten Prozessmodell wurden die Parameterstudien aus den Ultraschall-Drahtbondversuchensimuliert und direkt mit den experimentellen Ergebnissen verglichen, wobei sich einerelativ gute Übereinstimmung zwischen Simulation und Messung sowohl für Aluminium, als auchfür Kupfer, erzielen ließ.}}, author = {{Schemmel, Reinhard}}, isbn = {{ 978-3-8440-8527-3}}, pages = {{174}}, publisher = {{Shaker}}, title = {{{Enhanced process development by simulation of ultrasonic heavy wire bonding}}}, doi = {{10.17619/UNIPB/1-1280}}, volume = {{13}}, year = {{2022}}, } @article{34283, author = {{Gutt, Jana Kim and Thommes, Kirsten}}, issn = {{0065-0668}}, journal = {{Academy of Management Proceedings}}, keywords = {{Microbiology}}, number = {{1}}, publisher = {{Academy of Management}}, title = {{{Speaking of Performance: Evaluating Team Members’ Performance with Open-Ended Audio Comments}}}, doi = {{10.5465/ambpp.2022.16394abstract}}, volume = {{2022}}, year = {{2022}}, } @inproceedings{34298, author = {{Trentinaglia, Roman}}, booktitle = {{Proceedings of the 25th International Conference on Model Driven Engineering Languages and Systems: Companion Proceedings}}, publisher = {{ACM}}, title = {{{Deriving model-based safety and security assurance cases from design rationale of countermeasure patterns}}}, doi = {{10.1145/3550356.3558508}}, year = {{2022}}, } @article{34316, abstract = {{Eines der Lernziele des Physikstudiums stellt der Erwerb literaler Fähigkeiten für das Verfassen wissenschaftlicher Arbeiten dar. Die Student:innen werden allerdings im Rahmen ihres Studiums bisher kaum systematisch beim Erwerb dieser Fähigkeiten unterstützt. Eine Übungsgelegenheit für das Verfassen von Texten nach wissenschaftlichem Vorbild stellt das Laborpraktikum dar, in dem die Student:innen zu den absolvierten Experimenten Laborberichte verfassen. Im Paderborner Physik Praktikum 3P wurden in den letzten Jahren vier unterschiedliche Unterstützungsangebote für das Erlernen des wissenschaftlichen Schreibens entwickelt und mittels Zufriedenheitswerten evaluiert. In dem Beitrag werden die vier Angebote auf inhaltlicher Ebene hinsichtlich der Lernwirksamkeit mittels einer schriftproduktbasierten Evaluation analysiert. Durch die vergleichende Analyse können Potenziale und Grenzen der Angebote diskutiert und Implikationen für die Gestaltung von Unterstützungsangeboten zum Erlernen des wissenschaftlichen Schreibens in der Physik abgeleitet werden.}}, author = {{Bauer, Anna Brigitte and Lahme, Simon Zacharias and Sacher, Marc}}, journal = {{PhyDid A - Physik und Didaktik in Schule und Hochschule }}, keywords = {{Laborpraktikum, Schreiben}}, number = {{1}}, pages = {{23--34}}, title = {{{Potenziale und Grenzen von Unterstützungsmaßnahmen zum wissenschaftlichen Schreiben im Paderborner Physik Praktikum 3P}}}, volume = {{21}}, year = {{2022}}, } @article{34300, abstract = {{AbstractThe solvation of ions changes the physical, chemical and thermodynamic properties of water, and the microscopic origin of this behaviour is believed to be ion-induced perturbation of water’s hydrogen-bonding network. Here we provide microscopic insights into this process by monitoring the dissipation of energy in salt solutions using time-resolved terahertz–Raman spectroscopy. We resonantly drive the low-frequency rotational dynamics of water molecules using intense terahertz pulses and probe the Raman response of their intermolecular translational motions. We find that the intermolecular rotational-to-translational energy transfer is enhanced by highly charged cations and is drastically reduced by highly charged anions, scaling with the ion surface charge density and ion concentration. Our molecular dynamics simulations reveal that the water–water hydrogen-bond strength between the first and second solvation shells of cations increases, while it decreases around anions. The opposite effects of cations and anions on the intermolecular interactions of water resemble the effects of ions on the stabilization and denaturation of proteins.}}, author = {{Balos, Vasileios and Kaliannan, Naveen Kumar and Elgabarty, Hossam and Wolf, Martin and Kühne, Thomas and Sajadi, Mohsen}}, issn = {{1755-4330}}, journal = {{Nature Chemistry}}, keywords = {{General Chemical Engineering, General Chemistry}}, number = {{9}}, pages = {{1031--1037}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Time-resolved terahertz–Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water}}}, doi = {{10.1038/s41557-022-00977-2}}, volume = {{14}}, year = {{2022}}, } @book{34397, abstract = {{Wie werden technische Systeme zeitgemäß entwickelt, die in Komplexität und Anspruch alles bisher Dagewesene übertreffen? Darauf gibt Systems Engineering Antworten. Bisherige Beschreibungen sind für den Maschinenbau aber oft schwer greifbar und zu unkonkret. Dieses Buch bricht den internationalen Stand der Wissenschaft auf das Wesentliche herunter und beschreibt praxisnah die Kernelemente des Systems Engineering. Eine konkrete Schritt-für-Schritt Anleitung ebnet den Weg für den erfolgreichen Transfer aus der klassischen Produktentwicklung hin zum Systems Engineering. Die Inhalte werden grafisch professionell und bewusst lebendig vermittelt. So wird nicht nur ein fundiertes Systems Engineering-Verständnis geschaffen, sondern auch die Basis für Kommunikation und Umsetzung im Unternehmen gelegt.}}, author = {{Gräßler, Iris and Oleff, Christian}}, isbn = {{978-3-662-64516-1}}, publisher = {{Springer Verlag}}, title = {{{Systems Engineering - verstehen und industriell umsetzen}}}, year = {{2022}}, } @inproceedings{34415, abstract = {{Challenges in the development of resource-efficient lightweight designs, such as emission and cost targets in production, lead to an increasing demand for environmentally friendly and fast joining processes. Therefore, cold-forming mechanical joining techniques provide an energy-efficient alternative in comparison to established processes, such as spot welding. However, to ensure a sufficient reliability of the product design, not only the selection of an appropriate manufacturing and joining method, but also the suitable dimensioning and validation of the entire joining process is a crucial step. In this context, thermal processes offer a large number of design principles while mechanical joining methods mainly require extensive experimental tests and the inclusion of expert knowledge. Although few contributions already investigated the data-based analysis of mechanical joints, a system for the requirement- and manufacturing-oriented dimensioning of joining components, such as different profiles and blanks, in combination with the estimation of joint properties is not available yet. Motivated by this lack, this contribution introduces an engineering workbench for the support of design engineers in the early development phases of the knowledge and data-based design of mechanical joining connections using clinching as an example. In this regard, the approach is demonstrated involving a similar material and sheet thickness combination with static loads.}}, author = {{Zirngibl, Christoph and Sauer, Christopher and Schleich, Benjamin and Wartzack, Sandro}}, booktitle = {{Volume 2: 42nd Computers and Information in Engineering Conference (CIE)}}, publisher = {{American Society of Mechanical Engineers}}, title = {{{Knowledge and Data-Based Design and Dimensioning of Mechanical Joining Connections}}}, doi = {{10.1115/detc2022-89172}}, year = {{2022}}, } @article{34417, abstract = {{Given strict emission targets and legal requirements, especially in the automotive industry, environmentally friendly and simultaneously versatile applicable production technologies are gaining importance. In this regard, the use of mechanical joining processes, such as clinching, enable assembly sheet metals to achieve strength properties similar to those of established thermal joining technologies. However, to guarantee a high reliability of the generated joint connection, the selection of a best-fitting joining technology as well as the meaningful description of individual joint properties is essential. In the context of clinching, few contributions have to date investigated the metamodel-based estimation and optimization of joint characteristics, such as neck or interlock thickness, by applying machine learning and genetic algorithms. Therefore, several regression models have been trained on varying databases and amounts of input parameters. However, if product engineers can only provide limited data for a new joining task, such as incomplete information on applied joining tool dimensions, previously trained metamodels often reach their limits. This often results in a significant loss of prediction quality and leads to increasing uncertainties and inaccuracies within the metamodel-based design of a clinch joint connection. Motivated by this, the presented contribution investigates different machine learning algorithms regarding their ability to achieve a satisfying estimation accuracy on limited input data applying a statistically based feature selection method. Through this, it is possible to identify which regression models are suitable to predict clinch joint characteristics considering only a minimum set of required input features. Thus, in addition to the opportunity to decrease the training effort as well as the model complexity, the subsequent formulation of design equations can pave the way to a more versatile application and reuse of pretrained metamodels on varying tool configurations for a given clinch joining task.}}, author = {{Zirngibl, Christoph and Schleich, Benjamin and Wartzack, Sandro}}, issn = {{2673-2688}}, journal = {{AI}}, keywords = {{Industrial and Manufacturing Engineering}}, number = {{4}}, pages = {{990--1006}}, publisher = {{MDPI AG}}, title = {{{Estimation of Clinch Joint Characteristics Based on Limited Input Data Using Pre-Trained Metamodels}}}, doi = {{10.3390/ai3040059}}, volume = {{3}}, year = {{2022}}, } @inbook{33186, author = {{Harmening, Anda-Lisa Martha Josephine Anna}}, booktitle = {{Sonderausgabe des Jahrbuchs für internationale Germanistik 2022}}, title = {{{Das Leben nehmen oder den Tod geben – Selbstbestimmtes Sterben auf der Schwelle von Utopie zur Realität?}}}, year = {{2022}}, } @book{34450, editor = {{Harmening, Anda-Lisa Martha Josephine Anna and Leinfellner, Stefanie and Meier, Rebecca}}, isbn = {{978-3-534-27585-4}}, pages = {{352}}, publisher = {{wbg Academic}}, title = {{{Wissenstransfer als Aufgabe, Herausforderung und Chance kulturwissenschaftlicher Forschung}}}, volume = {{1}}, year = {{2022}}, } @book{34453, editor = {{Tönnies, Merle and Voigts, Eckart}}, publisher = {{Walter deGruyter}}, title = {{{Twenty-First Century Anxieties: Dys/Utopian Spaces and Contexts in Contemporary British Theatre}}}, volume = {{32}}, year = {{2022}}, } @article{34452, author = {{Tönnies, Merle and Flotmann-Scholz, Christina}}, journal = {{Anglistik: International Journal of English Studies}}, number = {{2}}, pages = {{ 257--272}}, title = {{{Directing Pandemic Attention: Dystopian Corona Narratives and the Nation in British Media and Politics}}}, volume = {{33}}, year = {{2022}}, } @article{34454, author = {{Tönnies, Merle and Voigts, Eckart}}, journal = {{Twenty-First Century Anxieties: Dys/Utopian Spaces and Contexts in Contemporary British Theatre (CDE Studies)}}, publisher = {{Walter deGruyter}}, title = {{{Anger, Anxiety and Hope: The Complicit Realities and Engaged/ing Communities of Contemporary Briitsh Dys/Utopian Theatre}}}, volume = {{32}}, year = {{2022}}, } @inbook{34467, author = {{Lütje-Klose , Birgit and Grüter, Sandra and Neumann, Phillip and Weber, Antonia and Goldan, Janka and Gorges, Julia and Wild, Elke}}, booktitle = {{Qualifizierung für Inklusion. Sekundarstufe }}, editor = {{Lutz, Deborah and Becker, Jonas and Buchhaupt, Felix and Katzenbach, Dieter and Strecker, Alicia and Urban, Michael}}, isbn = {{978-3-8309-4514-7}}, pages = {{163--178}}, publisher = {{Waxmann}}, title = {{{Weil wir tatsächlich nicht voneinander wussten, was jeder Einzelne so an verborgenen Schätzen bringt}}}, doi = {{10.31244/9783830995142}}, volume = {{3}}, year = {{2022}}, } @inproceedings{34465, author = {{laeim, Huddad and Schlickriede, Christian and Chaisakul, Papichaya and Chattham, Nattaporn and Panitchakan, Hathai and Siangchaew, Krisda and Zentgraf, Thomas and Pattanaporhratana, Apichart}}, booktitle = {{Metamaterials, Metadevices, and Metasystems 2022}}, editor = {{Engheta, Nader and Noginov, Mikhail A. and Zheludev, Nikolay I.}}, publisher = {{SPIE}}, title = {{{Design and investigation of a metalens for efficiency enhancement of laser-waveguide coupling in a limited space system}}}, doi = {{10.1117/12.2629789}}, year = {{2022}}, } @article{32578, abstract = {{Abstract Background The outcome after ACL reconstruction (ACLR) is in general disappointing with unacceptable number of athletes that do not return to pre-injury level of sports, high re-injury rates, early development of osteoarthritis and shorter careers. Athletes after ACLR have high expectation to return to sports which is in contrast with the current outcomes. The aim of this manuscript is to present an overview of factors that are needed to be incorporated and to personalize the rehabilitation process for an athlete who has undergone an ACLR. Level of evidence 4. }}, author = {{Gokeler, Alli and Grassi, Alberto and Hoogeslag, Roy and van Houten, Albert and Bolling, Caroline and Buckthorpe, Matthew and Norte, Grant and Benjaminse, Anne and Heuvelmans, Pieter and Di Paolo, Stefano and Tak, Igor and Villa, Francesco Della}}, issn = {{2197-1153}}, journal = {{Journal of Experimental Orthopaedics}}, keywords = {{Orthopedics and Sports Medicine}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Return to sports after ACL injury 5 years from now: 10 things we must do}}}, doi = {{10.1186/s40634-022-00514-7}}, volume = {{9}}, year = {{2022}}, } @article{32361, author = {{Scharfen, Hans-Erik and Lehmann, Tim and Büchel, Daniel and Baumeister, Jochen}}, issn = {{1469-0292}}, journal = {{Psychology of Sport and Exercise}}, keywords = {{Applied Psychology}}, publisher = {{Elsevier BV}}, title = {{{Cortical responses to sport-specific stimuli in a standing stop signal task}}}, doi = {{10.1016/j.psychsport.2022.102250}}, year = {{2022}}, } @article{32449, author = {{Di Paolo, Stefano and Nijmeijer, Eline and Bragonzoni, Laura and Dingshoff, Evelien and Gokeler, Alli and Benjaminse, Anne}}, issn = {{1746-1391}}, journal = {{European Journal of Sport Science}}, keywords = {{Orthopedics and Sports Medicine, Physical Therapy, Sports Therapy and Rehabilitation, General Medicine}}, pages = {{1--10}}, publisher = {{Informa UK Limited}}, title = {{{Comparing lab and field agility kinematics in young talented female football players: Implications for ACL injury prevention}}}, doi = {{10.1080/17461391.2022.2064771}}, year = {{2022}}, } @article{34478, abstract = {{Abstract Background The outcome after ACL reconstruction (ACLR) is in general disappointing with unacceptable number of athletes that do not return to pre-injury level of sports, high re-injury rates, early development of osteoarthritis and shorter careers. Athletes after ACLR have high expectation to return to sports which is in contrast with the current outcomes. The aim of this manuscript is to present an overview of factors that are needed to be incorporated and to personalize the rehabilitation process for an athlete who has undergone an ACLR. Level of evidence 4. }}, author = {{Gokeler, Alli and Grassi, Alberto and Hoogeslag, Roy and van Houten, Albert and Lehman, Tim and Bolling, Caroline and Buckthorpe, Matthew and Norte, Grant and Benjaminse, Anne and Heuvelmans, Pieter and Di Paolo, Stefano and Tak, Igor and Villa, Francesco Della}}, issn = {{2197-1153}}, journal = {{Journal of Experimental Orthopaedics}}, keywords = {{Orthopedics and Sports Medicine}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Return to sports after ACL injury 5 years from now: 10 things we must do}}}, doi = {{10.1186/s40634-022-00514-7}}, volume = {{9}}, year = {{2022}}, } @article{34477, author = {{Gokeler, Alli and Grassi, Alberto and Hoogeslag, Roy and van Houten, Albert and Lehman, Tim and Bolling, Caroline and Buckthorpe, Matthew and Norte, Grant and Benjaminse, Anne and Heuvelmans, Pieter and Di Paolo, Stefano and Tak, Igor and Villa, Francesco Della}}, issn = {{2197-1153}}, journal = {{Journal of Experimental Orthopaedics}}, keywords = {{Orthopedics and Sports Medicine}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Correction: Return to sports after ACL injury 5 years from now: 10 things we must do}}}, doi = {{10.1186/s40634-022-00548-x}}, volume = {{9}}, year = {{2022}}, } @article{34475, author = {{Di Paolo, Stefano and Nijmeijer, Eline and Bragonzoni, Laura and Dingshoff, Evelien and Gokeler, Alli and Benjaminse, Anne}}, issn = {{1746-1391}}, journal = {{European Journal of Sport Science}}, keywords = {{Orthopedics and Sports Medicine, Physical Therapy, Sports Therapy and Rehabilitation, General Medicine}}, pages = {{1--10}}, publisher = {{Informa UK Limited}}, title = {{{Comparing lab and field agility kinematics in young talented female football players: Implications for ACL injury prevention}}}, doi = {{10.1080/17461391.2022.2064771}}, year = {{2022}}, } @inbook{34292, author = {{Wolters, Dennis and Engels, Gregor}}, booktitle = {{Product-Focused Software Process Improvement}}, editor = {{Taibi, Davide and Kuhrmann, Marco and Mikkonen, Tommi and Klünder, Jil and Abrahamsson, Pekka}}, isbn = {{9783031213878}}, issn = {{0302-9743}}, pages = {{235--242}}, publisher = {{Springer International Publishing}}, title = {{{Towards Situational Process Management for Professional Education Programmes}}}, doi = {{10.1007/978-3-031-21388-5_16}}, volume = {{13709}}, year = {{2022}}, } @inproceedings{34532, abstract = {{This report presents the results of a friendly competition for formal verification and policy synthesis of stochastic models. It also introduces new benchmarks and their properties within this category and recommends next steps for this category towards next year’s edition of the competition. In comparison with tools on non-probabilistic models, the tools for stochastic models are at the early stages of development that do not allow full competition on a standard set of benchmarks. We report on an initiative to collect a set of minimal benchmarks that all such tools can run, thus facilitating the comparison between efficiency of the implemented techniques. The friendly competition took place as part of the workshop Applied Verification for Continuous and Hybrid Systems (ARCH) in Summer 2022.}}, author = {{Abate, Alessandro and Blom, Henk and Delicaris, Joanna and Haesaert, Sofie and Hartmanns, Arnd and van Huijgevoort, Birgit and Lavaei, Abolfazl and Ma, Hao and Niehage, Mathis and Remke, Anne and Schön, Oliver and Schupp, Stefan and Soudjani, Sadegh and Willemsen, Lisa}}, booktitle = {{EPiC Series in Computing}}, issn = {{2398-7340}}, publisher = {{EasyChair}}, title = {{{ARCH-COMP22 Category Report: Stochastic Models}}}, doi = {{10.29007/lsvc}}, year = {{2022}}, } @article{34533, author = {{Brosch, Anian and Wallscheid, Oliver and Böcker, Joachim}}, journal = {{IEEE Transactions on Power Electronics}}, keywords = {{Electrical and Electronic Engineering}}, publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}}, title = {{{Model Predictive Torque Control for Permanent Magnet Synchronous Motors Using a Stator-Fixed Harmonic Flux Reference Generator in the Entire Modulation Range}}}, doi = {{10.1109/tpel.2022.3229619}}, year = {{2022}}, } @unpublished{34524, abstract = {{While trade-offs between modeling effort and model accuracy remain a major concern with system identification, resorting to data-driven methods often leads to a complete disregard for physical plausibility. To address this issue, we propose a physics-guided hybrid approach for modeling non-autonomous systems under control. Starting from a traditional physics-based model, this is extended by a recurrent neural network and trained using a sophisticated multi-objective strategy yielding physically plausible models. While purely data-driven methods fail to produce satisfying results, experiments conducted on real data reveal substantial accuracy improvements by our approach compared to a physics-based model.}}, author = {{Schön, Oliver and Götte, Ricarda-Samantha and Timmermann, Julia}}, booktitle = {{arXiv:2204.12972}}, title = {{{Multi-Objective Physics-Guided Recurrent Neural Networks for Identifying Non-Autonomous Dynamical Systems}}}, doi = {{10.1016/j.ifacol.2022.07.282}}, year = {{2022}}, } @unpublished{34530, abstract = {{This paper addresses the problem of computing controllers that are correct by design for safety-critical systems and can provably satisfy (complex) functional requirements. We develop new methods for models of systems subject to both stochastic and parametric uncertainties. We provide for the first time novel simulation relations for enabling correct-by-design control refinement, that are founded on coupling uncertainties of stochastic systems via sub-probability measures. Such new relations are essential for constructing abstract models that are related to not only one model but to a set of parameterized models. We provide theoretical results for establishing this new class of relations and the associated closeness guarantees for both linear and nonlinear parametric systems with additive Gaussian uncertainty. The results are demonstrated on a linear model and the nonlinear model of the Van der Pol Oscillator.}}, author = {{Schön, Oliver and Huijgevoort, Birgit van and Haesaert, Sofie and Soudjani, Sadegh}}, booktitle = {{arXiv:2210.08269}}, title = {{{Correct-by-Design Control of Parametric Stochastic Systems}}}, year = {{2022}}, } @inproceedings{34542, author = {{Campagner, Andrea and Lienen, Julian and Hüllermeier, Eyke and Ciucci, Davide}}, booktitle = {{Lecture Notes in Computer Science}}, location = {{Suzhou, China}}, pages = {{57--70}}, publisher = {{Springer}}, title = {{{Scikit-Weak: A Python Library for Weakly Supervised Machine Learning}}}, volume = {{13633}}, year = {{2022}}, } @misc{34549, author = {{Schönhärl, Korinna}}, booktitle = {{Sehepunkte}}, number = {{11}}, title = {{{Review on: Daniel Benedikt Stienen: Verkauftes Vaterland}}}, volume = {{22}}, year = {{2022}}, } @misc{34554, author = {{Schönhärl, Korinna}}, booktitle = {{HSozKult}}, title = {{{Review on: Sven Steinmo: Willing to Pay? A Reasonable Choice Approach }}}, year = {{2022}}, } @article{34614, abstract = {{Mit steigenden Optimierungsanforderungen an das Individuum wächst auch das indivi- duelle Bedürfnis nach Kontrolle. Dieses kann u. a. durch self tracking-Technologien erfüllt werden. Anhand von drei Fallbeispielen – der Personenwaage, dem Wearable und dem habit tracker – zeigt dieser Aufsatz, wie sich medienbasierte Selbsttechnologien im historischen Verlauf intensiviert und stärker in den Alltag integriert haben. Ein besonderer Fokus liegt dabei auf der Ambivalenz dieser Medien: Ermöglichen sie auf der einen Seite zwar eine Selbstkontrolle und stellen so potenziell sta- bilisierende Ressourcen für das Individuum dar, schaffen sie auf der anderen Seite auch neue Anforderungen, die es zu erfüllen gilt.}}, author = {{Schloots, Franziska Margarete}}, journal = {{ffk Journal}}, keywords = {{self-tracking, Selbsttechnologien, Wearable, Bullet Journal, Personenwaage, Selbstvermessung}}, number = {{7}}, pages = {{74--91}}, title = {{{‚Understand what’s happening within‘. Selbstkontrolle mit Personenwaage, Wearable und habit tracker}}}, doi = {{10.25969/MEDIAREP/18238}}, volume = {{6}}, year = {{2022}}, } @unpublished{34618, abstract = {{In this article, we show how second-order derivative information can be incorporated into gradient sampling methods for nonsmooth optimization. The second-order information we consider is essentially the set of coefficients of all second-order Taylor expansions of the objective in a closed ball around a given point. Based on this concept, we define a model of the objective as the maximum of these Taylor expansions. Iteratively minimizing this model (constrained to the closed ball) results in a simple descent method, for which we prove convergence to minimal points in case the objective is convex. To obtain an implementable method, we construct an approximation scheme for the second-order information based on sampling objective values, gradients and Hessian matrices at finitely many points. Using a set of test problems, we compare the resulting method to five other available solvers. Considering the number of function evaluations, the results suggest that the method we propose is superior to the standard gradient sampling method, and competitive compared to other methods.}}, author = {{Gebken, Bennet}}, booktitle = {{arXiv:2210.04579}}, title = {{{Using second-order information in gradient sampling methods for nonsmooth optimization}}}, year = {{2022}}, } @article{33446, author = {{Dreher, Yannik and Fichtler, Julius and Karfusehr, Christoph and Jahnke, Kevin and Xin, Yang and Keller, Adrian and Göpfrich, Kerstin}}, issn = {{0006-3495}}, journal = {{Biophysical Journal}}, keywords = {{Biophysics}}, pages = {{4840--4848}}, publisher = {{Elsevier BV}}, title = {{{Genotype-phenotype mapping with polyominos made from DNA origami tiles}}}, doi = {{10.1016/j.bpj.2022.09.006}}, volume = {{121}}, year = {{2022}}, } @article{34642, abstract = {{AbstractThe influence of ultra-thin SiOx plasma deposited films on the corrosion resistance of adhesive films on a laser surface melted 7075 aluminium alloy was investigated by means of complementary techniques in comparison to the just laser surface melted state. Laser surface melting (LSM) was performed using a continuous wave mode at a wavelength of 1064 nm. Ultra-thin plasma polymer films were deposited from a mixture of hexamethyldisilane (HMDSO), oxygen, and argon by means of an audio-frequency glow discharge. The surface morphology and surface chemistry compositions were investigated by employing field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), diffuse reflection infrared Fourier transform spectroscopy, and X-ray photoelectron spectroscopy. The corrosion resistance of plasma polymer coated LSM Al-7075 alloy was studied using linear sweep voltammetry and electrochemical impedance spectroscopy in a chloride-containing electrolyte. The electrochemical studies showed an improved corrosion resistance for plasma film-coated alloys compared to the just laser surface melted state. To study the corresponding surface adhesive properties, the samples were coated with an epoxy amine adhesive. 90°-peel test under humid conditions confirmed the improvement of interfacial wet-adhesion corrosion tests showed a strong improvement of the delamination resistance of adhesives caused by the ultra-thin interfacial SiOx-films.}}, author = {{Varghese, J. and Vieth, P. and Xie, X. and Grundmeier, Guido}}, issn = {{2523-3963}}, journal = {{SN Applied Sciences}}, keywords = {{General Earth and Planetary Sciences, General Physics and Astronomy, General Engineering, General Environmental Science, General Materials Science, General Chemical Engineering}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Enhanced corrosion resistance of epoxy-films on ultra-thin SiOx PECVD film coated laser surface melted Al-alloys}}}, doi = {{10.1007/s42452-022-05244-0}}, volume = {{5}}, year = {{2022}}, } @article{34648, author = {{Hoppe, Christian and Mitschker, Felix and Mai, Lukas and Liedke, Maciej Oskar and Arcos, Teresa and Awakowicz, Peter and Devi, Anjana and Attallah, Ahmed Gamal and Butterling, Maik and Wagner, Andreas and Grundmeier, Guido}}, issn = {{1612-8850}}, journal = {{Plasma Processes and Polymers}}, keywords = {{Polymers and Plastics, Condensed Matter Physics}}, number = {{4}}, publisher = {{Wiley}}, title = {{{Influence of surface activation on the microporosity of PE‐CVD and PE‐ALD SiO x thin films on PDMS}}}, doi = {{10.1002/ppap.202100174}}, volume = {{19}}, year = {{2022}}, } @article{34651, author = {{Bürger, Julius and Venugopal, Harikrishnan and Kool, Daniel and de los Arcos, Teresa and Gonzalez Orive, Alejandro and Grundmeier, Guido and Brassat, Katharina and Lindner, Jörg K.N.}}, issn = {{2196-7350}}, journal = {{Advanced Materials Interfaces}}, keywords = {{General Medicine}}, number = {{26}}, publisher = {{Wiley}}, title = {{{High‐Resolution Study of Changes in Morphology and Chemistry of Cylindrical PS‐ b ‐PMMA Block Copolymer Nanomasks during Mask Development}}}, doi = {{10.1002/admi.202200962}}, volume = {{9}}, year = {{2022}}, } @article{34649, author = {{Neßlinger, Vanessa and Orive, Alejandro G. and Meinderink, Dennis and Grundmeier, Guido}}, issn = {{0021-9797}}, journal = {{Journal of Colloid and Interface Science}}, keywords = {{Colloid and Surface Chemistry, Surfaces, Coatings and Films, Biomaterials, Electronic, Optical and Magnetic Materials}}, pages = {{563--576}}, publisher = {{Elsevier BV}}, title = {{{Combined in-situ attenuated total reflection-Fourier transform infrared spectroscopy and single molecule force studies of poly(acrylic acid) at electrolyte/oxide interfaces at acidic pH}}}, doi = {{10.1016/j.jcis.2022.01.175}}, volume = {{615}}, year = {{2022}}, } @article{34650, author = {{Xie, Xiaofan and de los Arcos, Teresa and Grundmeier, Guido}}, issn = {{1612-8850}}, journal = {{Plasma Processes and Polymers}}, keywords = {{Polymers and Plastics, Condensed Matter Physics}}, number = {{11}}, publisher = {{Wiley}}, title = {{{Comparative analysis of hexamethyldisiloxane and hexamethyldisilazane plasma polymer thin films before and after plasma oxidation}}}, doi = {{10.1002/ppap.202200052}}, volume = {{19}}, year = {{2022}}, } @inproceedings{34419, author = {{Behrent, Sigrid}}, booktitle = {{Sprachen. Politik. Sprachenpolitik. Der Beitrag der Sprachenzentren zur Hochschule der Zukunft. Dokumentation der 31. Arbeitstagung vom 5.-7. März 2020 an der Europa-Universität Viadrina in Frankfurt (Oder)}}, editor = {{Klepper-Pang, Almut and Bahr, Andreas}}, location = {{Frankfurt a.d. Oder}}, number = {{54}}, pages = {{65--72}}, publisher = {{AKS-Verlag}}, title = {{{Mentoring-Programm zur Einarbeitung neuer Lehrbeauftragter. Format, Inhalte und Evaluationsergebnisse.}}}, year = {{2022}}, } @misc{34723, author = {{Schöppner, Volker and Gevers, Karina and Schraa, L. and Töws, P.}}, booktitle = {{Joining Plastics}}, issn = {{1864-3450}}, title = {{{Auswirkungen unterschiedlicher Erwärmstrategien auf die quasistatische und zyklische Belastbarkeit von infrarotgeschweißten, glasfaserverstärkten Thermoplastbauteilen}}}, year = {{2022}}, } @inproceedings{34717, author = {{Schöppner, Volker and Brüning, Florian and Sommer, L.}}, location = {{Fukuoka}}, title = {{{A Reverse Engineering Approach for Calibrating Frictional Behavior of Contact Models for Numerical Simulation of Solids Conveying in Extruders}}}, year = {{2022}}, } @misc{34722, author = {{Schöppner, Volker and Kleinschmidt, Dennis and Nillius, U. and Hopmann, C.}}, booktitle = {{GAK}}, title = {{{Auswirkungen des Vorscherungseinflusses im Extrusionsprozess auf die rheologischen Kennwerte gefüllter Kautschukmischungen}}}, year = {{2022}}, } @misc{34721, author = {{Schöppner, Volker and Dörner, Marius and Frank, Maximilian and Schall, Christoph Wilhelm Theodor}}, booktitle = {{Kunststoffe}}, title = {{{Auf der Welle zum Mischerfolg}}}, year = {{2022}}, } @techreport{34724, author = {{Moritzer, Elmar and Scholle, Maximilian}}, title = {{{BMC-Spritzgießen bricht die Glasfaser}}}, year = {{2022}}, } @misc{34732, author = {{Moritzer, Elmar and Scholle, Maximilian and Tölle, Lisa and Bomm, J.}}, booktitle = {{RFP Rubber Fibres Plastics}}, issn = {{1863-7116}}, title = {{{Influence of process parameter on fiber quality during fiber recycling through thermal fiber recovery}}}, year = {{2022}}, } @misc{34729, author = {{Moritzer, Elmar and Scholle, Maximilian and Tölle, Lisa and Bomm, J.}}, booktitle = {{GAK - Gummi Fasern Kunststoffe}}, title = {{{Einfluss der Prozessführung auf die Faserqualität beim Faserrecycling mittels thermischer Faserrückgewinnung}}}, year = {{2022}}, } @inproceedings{34730, author = {{Schöppner, Volker and Kleinschmidt, Dennis}}, location = {{Hannover}}, title = {{{Estimation and correction of non-isothermal effects of carbon black-filled rubber compounds in viscosity measurements}}}, year = {{2022}}, } @inproceedings{34731, author = {{Moritzer, Elmar and Richters, Maximilian}}, location = {{Fukuoka}}, title = {{{Filling and Flow Behavior of Novel Wood-Filled Thermoplastic Elastomers}}}, year = {{2022}}, } @inproceedings{34738, author = {{Schöppner, Volker and Kleinschmidt, Dennis and Hopmann, C. and Limper, A. and Fey, F. and Facklam, M. and Schön, M.}}, location = {{Aachen}}, title = {{{Investigations on the Influence of Viscoelasticity on the Swell Behaviour and Flow Instabilities of Carbon Black-Filled Rubber Compounds}}}, year = {{2022}}, } @inproceedings{34735, author = {{Schöppner, Volker and Brüning, Florian}}, location = {{Fukuoka}}, title = {{{Investigating Different Methods for Numerical Simulation of Temperature Development in a Feed Section of a Single-Screw Extruder}}}, year = {{2022}}, } @inproceedings{34734, author = {{Schöppner, Volker and Köllermeier, Jonas}}, location = {{Fukuoka}}, title = {{{Integration of IR Based Inline Measurement Systems of the Surface Temperature of Square Hollow Profiles in an Extrusion Process}}}, year = {{2022}}, } @inproceedings{34737, author = {{Schöppner, Volker and Frank, Maximilian}}, location = {{Fukuoka}}, title = {{{Investigation of the Pressure-Throughput Behavior of Different Spiral Shearing Sections on an Analytical and Simulative Basis}}}, year = {{2022}}, } @inproceedings{34740, author = {{Schöppner, Volker and Altepeter, Matthias and Wanke, S.}}, location = {{Fukuoka}}, title = {{{Modelling of the material degradation of polypropylene on the co-rotating twin-screw extruder}}}, year = {{2022}}, } @misc{34752, author = {{Schöppner, Volker and Kleinschmidt, Dennis and Nillius, U. and Hopmann, C.}}, booktitle = {{GAK}}, title = {{{Weiterentwicklung eines Verfahrens zur Korrektur von Wandgleiteffekten im Rahmen rheologischer Messungen an gefüllten Kautschukmischungen}}}, year = {{2022}}, } @techreport{34741, author = {{Moritzer, Elmar and Kröker, M. and Scholle, Maximilian}}, issn = {{2699-4534}}, title = {{{Rückführung zerkleinerter Organobleche}}}, year = {{2022}}, } @techreport{34746, author = {{Hopp, Matthias and Tölle, Lisa}}, title = {{{Teilchen-Kunde - Stäube beim mechanischen Recycling faserverstärkter Thermoplaste}}}, year = {{2022}}, } @inproceedings{34751, author = {{Schall, Christoph Wilhelm Theodor}}, location = {{Duisburg}}, title = {{{Vorteilhaftes Prozessverhalten von Wave-Schnecken}}}, year = {{2022}}, } @article{33250, author = {{Szopinski, Daniel and Massa, Lorenzo and John, Thomas and Kundisch, Dennis and Tucci, Christopher}}, journal = {{Communications of the Association for Information Systems}}, pages = {{774--841}}, title = {{{Modeling Business Models: A cross-disciplinary Analysis of Business Model Modeling Languages and Directions for Future Research}}}, volume = {{51}}, year = {{2022}}, } @article{34792, author = {{Glöckner, Helge}}, issn = {{2070-0466}}, journal = {{p-Adic Numbers, Ultrametric Analysis, and Applications}}, keywords = {{20Exx, 22Exx, 32Cxx}}, number = {{2}}, pages = {{138–144}}, title = {{{Non-Lie subgroups in Lie groups over local fields of positive characteristic}}}, doi = {{10.1134/S2070046622020042}}, volume = {{14}}, year = {{2022}}, } @article{34791, author = {{Glöckner, Helge and Schmeding, Alexander}}, issn = {{0232-704X}}, journal = {{Annals of Global Analysis and Geometry}}, keywords = {{58D15, 22E65, 26E15, 26E20, 46E40, 46T20, 58A05}}, number = {{2}}, pages = {{359–398}}, title = {{{Manifolds of mappings on Cartesian products}}}, doi = {{10.1007/s10455-021-09816-y}}, volume = {{61}}, year = {{2022}}, } @article{34796, abstract = {{We prove various results in infinite-dimensional differential calculus that relate the differentiability properties of functions and associated operator-valued functions (e.g., differentials). The results are applied in two areas: (1) in the theory of infinite-dimensional vector bundles, to construct new bundles from given ones, such as dual bundles, topological tensor products, infinite direct sums, and completions (under suitable hypotheses); (2) in the theory of locally convex Poisson vector spaces, to prove continuity of the Poisson bracket and continuity of passage from a function to the associated Hamiltonian vector field. Topological properties of topological vector spaces are essential for the studies, which allow the hypocontinuity of bilinear mappings to be exploited. Notably, we encounter kR-spaces and locally convex spaces E such that E×E is a kR-space.}}, author = {{Glöckner, Helge}}, issn = {{2075-1680}}, journal = {{Axioms}}, number = {{5}}, title = {{{Aspects of differential calculus related to infinite-dimensional vector bundles and Poisson vector spaces}}}, doi = {{10.3390/axioms11050221}}, volume = {{11}}, year = {{2022}}, } @unpublished{34804, abstract = {{Starting with a finite-dimensional complex Lie algebra, we extend scalars using suitable commutative topological algebras. We study Birkhoff decompositions for the corresponding loop groups. Some results remain valid for loop groups with valued in complex Banach-Lie groups.}}, author = {{Glöckner, Helge}}, booktitle = {{arXiv:2206.11711}}, title = {{{Birkhoff decompositions for loop groups with coefficient algebras}}}, year = {{2022}}, } @inproceedings{34811, author = {{Wippermann, Jan and Meschut, Gerson and Koschukow, Wikentji and Liebsch, Alexander and Gude, Maik and Kolbe, Björn and Minch, Steven}}, booktitle = {{IIW2022, Annual Assembly, Commission III}}, title = {{{Thermal influence of resistance spot welding on nearby overmoulded plastic metal joints}}}, year = {{2022}}, } @inproceedings{34725, author = {{Moritzer, Elmar and Held, Christian}}, location = {{Tokyo}}, title = {{{Characterization of additively manufactured plastic components for direct screwing}}}, year = {{2022}}, } @inproceedings{34810, author = {{Wippermann, Jan and Meschut, Gerson and Stepputat, Marten and Flügge, Wilko}}, booktitle = {{12. Gemeinsames Kolloquium zur Mechanischen Fügetechnik}}, title = {{{Flexible Teilautomatisierung des robotergestützten mechanischen Fügens}}}, year = {{2022}}, } @misc{33291, author = {{Moritzer, Elmar and Rauen, Dennis}}, booktitle = {{Kunststoffe}}, pages = {{79--81}}, title = {{{Plasmaaktivierung fehlgeschlagen!}}}, year = {{2022}}, } @article{32877, author = {{Gaidai, Roman and Gölz, Christian Johannes and Mora, K. and Rudisch, J. and Reuter, E.-M. and Godde, B. and Reinsberger, C. and Voelcker-Rehage, C. and Vieluf, S.}}, issn = {{0006-8993}}, journal = {{Brain Research}}, keywords = {{Developmental Biology, Neurology (clinical), Molecular Biology, General Neuroscience}}, publisher = {{Elsevier BV}}, title = {{{Classification characteristics of fine motor experts based on electroencephalographic and force tracking data}}}, doi = {{10.1016/j.brainres.2022.148001}}, volume = {{1792}}, year = {{2022}}, } @article{33743, author = {{Zierau, Cornelia and Jung, Ulla}}, journal = {{Fördermagazin: Berufsbezogene Sprachbildung und Sprachförderung Heft 3/2022 }}, pages = {{3--6}}, title = {{{Berufsvorbereitende Sprachförderung. Wie werden Schülerinnen und Schüler fit für den Beruf?}}}, volume = {{3}}, year = {{2022}}, } @book{33800, editor = {{Zierau, Cornelia}}, title = {{{Fördermagazin: Berufsbezogene Sprachbildung und Sprachförderung Heft 3/2022 }}}, year = {{2022}}, } @inbook{33744, author = {{Zierau, Cornelia}}, booktitle = {{Adoleszenz und Alterität. Synergien aktueller Ansätze der interkulturellen Literaturwissenschaft und Literaturdidaktik. (im Druck)}}, editor = {{Osthues, Julian and Pavlik, Jennifer}}, location = {{Bremen}}, pages = {{101--121}}, publisher = {{Universitätsverlag Winter}}, title = {{{Inszenierungen von Adoleszenz und Alterität in Wolfgang Herrndorfs Roman „Tschick“}}}, year = {{2022}}, } @article{34876, author = {{Dressler, Falko and Chiasserini, Carla Fabiana and Fitzek, Frank H. P. and Karl, Holger and Lo Cigno, Renato and Capone, Antonio and Casetti, Claudio Ettore and Malandrino, Francesco and Mancuso, Vincenzo and Klingler, Florian and Rizzo, Gianluca A.}}, journal = {{IEEE Network}}, number = {{3}}, pages = {{24–31}}, publisher = {{IEEE}}, title = {{{V-Edge: Virtual Edge Computing as an Enabler for Novel Microservices and Cooperative Computing}}}, doi = {{10.1109/MNET.001.2100491}}, volume = {{36}}, year = {{2022}}, } @article{34883, author = {{Diester, Michel}}, journal = {{Rabbit Eye - Zeitschrift für Filmforschung, 013}}, number = {{013}}, title = {{{Oddly satisfying und die Genugtuung der Anschaulichkeit}}}, year = {{2022}}, } @article{13147, abstract = {{Employing a unique and hand-collected sample of 648 true sale loan securitization transactions issued by 57 stock-listed banks across the EU-12 plus Switzerland over the period from 1997 to 2010, this paper empirically analyzes the relationship between true sale loan securitization and the issuing banks’ non-performing loans to total assets ratios. Overall, we provide evidence for a negative impact of securitization on NPL exposures suggesting that banks predominantly used securitization as an instrument of credit risk transfer and diversification. In addition, the analysis at hand reveals a time-sensitive relationship between securitization and NPL exposures. While we observe an even stronger NPL-reducing effect through securitization during the non-crisis periods, the effect reverses during and after the global financial crisis suggesting that banks were forced to provide credit enhancement and employ securitization as a funding management tool. Along with the results from a variety of sensitivity analyses our study provides important implications for the recent debate on reducing NPL exposures of European banks by revitalizing the European securitization market.}}, author = {{Wengerek, Sascha Tobias and Hippert, Benjamin and Uhde, André}}, journal = {{The Quarterly Review of Economics and Finance}}, keywords = {{European Banking, Non-performing Loans, Securitization}}, pages = {{48--64}}, publisher = {{Elsevier}}, title = {{{Risk allocation through securitization – Evidence from non-performing loans}}}, doi = {{https://doi.org/10.1016/j.qref.2022.06.005}}, volume = {{Vol. 86 (11)}}, year = {{2022}}, } @inbook{35061, author = {{Süßmann, Johannes}}, booktitle = {{Gründung und Aufbau der Universität Münster, 1773–1818. Zwischen katholischer Aufklärung, französischen Experimenten und preußischem Neuanfang}}, editor = {{Overhoff, Jürgen and Happ, Sabine}}, pages = {{87–107}}, publisher = {{Aschendorff}}, title = {{{Franz von Fürstenbergs Konzeption der Universität Münster als aufgeklärte Überbietung Paderborns}}}, volume = {{16}}, year = {{2022}}, } @misc{35060, author = {{Büttner, Nils and Süßmann, Johannes}}, booktitle = {{Handbuch Idylle. Verfahren – Traditionen – Theorien}}, editor = {{Gerstner, Jan and Heller, Jakob C. and Schmitt, Christian}}, isbn = {{978-3-476-05864-5}}, pages = {{129–135}}, publisher = {{J.B. Metzler}}, title = {{{[Art.] Idylle und Natur in Aufklärung und Empfindsamkeit}}}, doi = {{https://doi.org/10.1007/978-3-476-05865-2_19}}, year = {{2022}}, } @misc{35067, author = {{Süßmann, Johannes}}, title = {{{Gegenreformation und verpaßte Aufklärung. Die Gründung der Academia Theodoriana 1614 und ihre Entwicklung im 17. und 18. Jahrhundert. Videographierter Vortrag für die Ringvorlesung zum fünfzigjährigen Bestehen der Gesamthochschule Paderborn am 13. April 2022 in Paderborn}}}, year = {{2022}}, } @article{30626, abstract = {{Clinching is a very cost-efficient method for joining two or more sheets made of identical or different materials. However, the current evaluation methods cannot confirm the critical geometrical features of joints such as neck thickness, undercut, and bottom thickness. Furthermore, the effects caused by joining process such as elastic deformation and crack-closure are significant for the joining quality, but often earn insufficient attention. Therefore, computed tomography (CT) and Transient Dynamic Analysis (TDA) as an ultrasonic testing and evaluation procedure are combined to overcome the obstacles mentioned above. In order to have a well-defined and reproducible typical geometrical error in clinching, specimens with a pre-specified lateral offset of the punch with 0.1 mm, 0.2 mm are as well as with no lateral offset are investigated using CT. The specimens are treated with conductive copper varnish in varying intensities to support the two sheets' distinguishability in the CT measurement. The subsequently extracted surfaces from CT-scan data are used to create three-dimensional models for a numerical Transient Dynamic Analysis. Hereby, a harmonic force is applied to one sheet and the transferred energy is determined at the opposite side of the clinch point on the other sheet. The transmitted energy can be used as a quantitative measure for the joining quality. This setup is simulated by means of Finite-Element-Method and the specimens are investigated experimentally using a piezo actuator and a piezo sensor. The novelty of the results presented here is the completely non-destructive investigation of joint specimen by CT of similar materials with a contrast given foil in between the sheets and the subsequent TDA, which can easily detect difference between the specimens by evaluation of the energy dissipation of the joints.}}, author = {{Köhler, D. and Sadeghian, B. and Troschitz, J. and Kupfer, R. and Gude, M. and Brosius, A.}}, journal = {{Journal of Advanced Joining Processes}}, pages = {{100089}}, title = {{{Characterisation of lateral offsets in clinch points with computed tomography and transient dynamic analysis}}}, doi = {{10.1016/j.jajp.2021.100089}}, volume = {{5}}, year = {{2022}}, } @article{30625, abstract = {{Continuous fiber reinforced thermoplastics (CFRT)/steel hybrid parts offer promising properties and possibilities, which can exceed the capabilities of both individual materials. In this case, the joining operation presents the main challenge. This paper studies the direct pin pressing where metallic pins with undercutting geometries, protruding from the metal component, are inserted into a locally infrared heated CFRT component. The aim is to investigate the joining process with a focus on the filling of the undercut features with matrix and fibers to create a primarily form-fitting joint. For good mechanical properties of the joint, it is crucial, that the undercutting features are filled and do not lead to significant deconsolidations. The pin structures are manufactured from 42CrMo4 steel on a cnc-lathe and are joined via welding with HCT600+Zn sheet metal. The CFRT samples are manufactured from polypropylene and approximately 45% vol. unidirectional glass fibers. In the scope of this study, different pin geometries are joined with varying process settings and micro sections of the joints are investigated via reflected light microscopy. It could be shown that the undercuts can be completely filled with matrix and fiber material using the described process route. Based on the optical investigations a suitable setting of joining parameters is defined and lap shear as well as cross head samples are manufactured and experimentally tested. It could be seen that independently from the pin geometry the lap shear strength was primarily limited due to shear failure of the pin structures and it is assumed that the base diameter and pin strength predominantly determine the joint strength. Cross head samples failed due to pin extraction. Here, a significant increase of the joint strength with undercutting features could be shown in comparison to cylindrical reference pins.}}, author = {{Popp, J. and Drummer, D.}}, journal = {{Journal of Advanced Joining Processes}}, pages = {{100084}}, title = {{{Joining of continuous fiber reinforced thermoplastic/steel hybrid parts via undercutting pin structures and infrared heating}}}, doi = {{10.1016/j.jajp.2021.100084}}, volume = {{5}}, year = {{2022}}, } @article{30624, abstract = {{In addition to brazing and welding processes, mechanical joining processes such as clinching are increasingly being used. Clinch joints offer an advantage over metallurgical joining processes by giving the possibility of joining different material combinations without typical drawbacks. Thereby clinching offers an enormous advantage for lightweight construction. An additional benefit is a great variability in the geometric shapes of the toolsets, which ensure optimum adaptation of the clinching process on variations of the joining elements such as e.g. the sheet thickness. However, the vast variability is also one of the major challenges regarding the prediction of the joint reliability. In the work presented, the effect of different toolset geometries was investigated with a particular focus on the interaction between geometrical features and deformation-induced microstructural changes. Light optical and electron microscopy techniques, as well as micro-hardness measurements, were performed. The results were evaluated and discussed concerning the material's deformation behavior, the change in geometrical shape and the microstructural evolution due to the different tool geometries. The findings point out the main influence factors regarding the mechanical properties in general and the fatigue behavior in particular.}}, author = {{Ewenz, L. and Kuczyk, M. and Zimmermann, M.}}, journal = {{Journal of Advanced Joining Processes}}, title = {{{Effect of the tool geometry on microstructure and geometrical features of clinched aluminum}}}, doi = {{10.1016/j.jajp.2021.100091}}, volume = {{5}}, year = {{2022}}, } @article{30622, author = {{Gröger, B. and Würfel, V. and Hornig, A. and Gude, M.}}, journal = {{Journal of Advanced Joining Processes}}, title = {{{Forming process induced material structure of fibre-reinforced thermoplastics - Experimental and numerical investigation of a bladder-assisted moulding process}}}, doi = {{10.1016/j.jajp.2022.100100}}, volume = {{5}}, year = {{2022}}, } @article{30717, abstract = {{To achieve the climate objectives, various measures are taken to increase the efficiency of raw materials and energies used. A sector with a large proportion of the global consumption of resources is the mobility sector. To increase the efficiency in this field, large efforts are made to reduce the weight of moving masses. One approach is the use of multi-material systems, which utilises different materials and their specific properties depending on the local requirements. Multi-material systems consist often of materials which differ in strength and density, for example, high-strength steels, aluminium alloys or polymers. Additionally, such a system can utilise different geometries of the components to be joined, characterised for example by varying sheet thicknesses. A central challenge of producing these systems is the joining of the individual components. This requires robust joining processes capable of covering the entire spectrum of possible variants and is feasible for different physical properties of the materials. Since conventional joining processes are rather rigid and have difficulty reacting to changing process and disturbance variables, new joining processes are necessary. With the objective of being able to react versatile to varying parameters, a process combination consisting of a semi-tubular self-piercing riveting process and orbital forming process with adjustable tumbling kinematic is introduced. Due to the process combination of tumbling and self-piercing riveting, mutual influences of the two process components are analysed in regard to material flow and process forces. Further, the investigations show the influence of a varying tumbling angle on the joining process itself and how the characteristic properties undercut, rivet head end position and residual sheet thickness of the joint are affected. The material used for the joining partners is an aluminium alloy EN AW-6014 typical for multi-material systems in the automotive industry and the rivets are from type Rivset C produced by the Böllhoff company.}}, author = {{Wituschek, S. and Lechner, M.}}, journal = {{Production Engineering}}, title = {{{Investigation of the influence of the tumbling angle on a tumbling self-piercing riveting process}}}, doi = {{10.1177/14644207221080068}}, year = {{2022}}, } @article{30629, abstract = {{Clinching is a joining process that is becoming more and more important in industry due to the increasing use of multi-material designs. Despite the already widespread use of the process, there is still a need for research to understand the mechanisms and design of clinched joints. In contrast to the tool parameters, process and material disturbances have not yet been investigated to a relatively large extent. However, these also have a great influence on the properties and applicability of clinching. The effect of process disturbances on the clinched joint are investigated with numerical and experimental methods. The investigated process variations are the history of the sheets using the pre-hardening of the material, different sheet thicknesses, sheet arrangements and punch strokes. For the consideration of the material history, a specimen geometry for pre-stretching specimens in uniaxial tension is used, from which the pre-stretched secondary specimens are taken. A finite element model is set up for the numerical investigations. Suitable clinching tools are selected. With the simulation, selected process influences can be examined. The effort of the numerical investigations is considerably reduced with the help of a statistical experimental design according to Taguchi. To confirm the simulation results, experimental investigations of the clinch point geometry by using micrographs and the shear strength of the clinched joint are performed. The analysis of the influence of difference disturbance factors on the clinching process demonstrate the importance of the holistic view of the clinching process.}}, author = {{Steinfelder, C. and Acksteiner, J. and Guilleaume, C. and Brosius, A.}}, journal = {{Production Engineering}}, title = {{{Analysis of the interactions between joint and component properties during clinching}}}, doi = {{10.1007/s11740-021-01102-x}}, year = {{2022}}, } @article{30640, abstract = {{Surface determination is an essential step of the measurement process in industrial X-ray computed tomography (XCT). The starting point of the surface determination process step is a single grey value threshold within a voxel volume in conventional surface determination methods. However, this value is not always found in the reconstructed volume in the local environment of the surface of the measurement object due to various artefacts, so that none or incorrect surfaces are determined. In order to find surfaces independently of a single grey value, a three-dimensional approach of the initial contour determination based on a Prewitt edge detection algorithm is presented in this work. This method is applied to different test specimens and specimen compositions which, due to their material or material constellation, their geometric properties with regard to surfaces and interfaces as well as their calibrated size and length dimensions, embody relevant properties in the examination of joining connections. It is shown that by using the surface determination method in the measurement process, both a higher metrological structure resolution and interface structure resolution can be achieved. Surface artefacts can be reduced by the application and it is also an approach to improved surface finding for the multi-material components that are challenging for XCT.}}, author = {{Busch, M. and Hausotte, T.}}, journal = {{Production Engineering}}, title = {{{Application of an edge detection algorithm for surface determination in industrial X-ray computed tomography}}}, doi = {{10.1007/s11740-021-01100-z}}, year = {{2022}}, } @article{30628, abstract = {{The work carried out is based on the thesis properties of clinched joints are determined by the proportions of binding mechanisms form-closure, force-closure and material-closure. To describe the acting binding mechanisms and thus to derive the joint properties, detailed knowledge of the local effect of the individual binding mechanisms is necessary to ensure their targeted adjustment by the joining process. The targeted setting of different proportions of the binding mechanisms is achieved firstly via tool geometry and secondly via surface condition of the joined parts. An introduced form-closure component can be quantified by metallographic cross section with subsequent measurement of the quality-determining parameters such as undercut, penetration depth and neck thickness. To qualify the force-closure component, a torsional load can be applied mechanically at rotationally symmetrical clinch joints. This also allows the influence of different surface conditions on the tribological system to be quantified. Measurement of electrical resistance can reveal the binding mechanisms of force- and material-closure. These investigations are carried out on an aluminum joining part combination of the same type. As a result of these investigations, the clinched joints can be designed according to the load occurring in the later life cycle in the form of an optimum and compromise variant with regard to minimum loads to be transmitted mechanically, electrically with regard to low resistance or manufacturing with minimum energy input.}}, author = {{Kalich, J. and Füssel, U.}}, journal = {{Production Engineering}}, title = {{{Design of clinched joints on the basis of binding mechanisms}}}, doi = {{10.1007/s11740-022-01108-z}}, year = {{2022}}, }