@inproceedings{33558, author = {{Wilke, Daria and Pfeifer, Stefan and Heitmann, Rebecca and Anacker, Harald and Dumitrescu, Roman and Franke, Volker }}, booktitle = {{Proceedings of the IEEE ISSE }}, location = {{Wien, Österreich}}, title = {{{Implementation of Systems Engineering: A maturity-based approach}}}, year = {{2022}}, } @inproceedings{33561, author = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson}}, location = {{Blankenburg (Harz)}}, title = {{{Experimentelle Untersuchung des Ermüdungsverhaltens und Berechnung der Lebensdauer von Stahlklebverbindungen bei multiaxialer Belastung}}}, year = {{2022}}, } @article{33568, author = {{Rezat, Sara and Scholle, Oliver and Bendner, Sarah}}, journal = {{Praxis Deutsch 292}}, pages = {{22--26}}, title = {{{Fridolin-Duck Karotti. Mit einem kollaborativen Schreibtool gemeinsam Fantasiere beschreiben}}}, year = {{2022}}, } @article{33665, author = {{Fritz, Marlon}}, issn = {{2110-7017}}, journal = {{International Economics}}, keywords = {{General Economics, Econometrics and Finance, General Business, Management and Accounting}}, pages = {{157--167}}, publisher = {{Elsevier BV}}, title = {{{Improved output gap estimates and forecasts using a local linear regression}}}, doi = {{10.1016/j.inteco.2022.09.007}}, volume = {{172}}, year = {{2022}}, } @article{33529, author = {{Rezat, Sara}}, journal = {{Praxis Deutsch}}, number = {{292}}, pages = {{4--13}}, title = {{{Digital lesen und schreiben. Basisbeitrag}}}, year = {{2022}}, } @book{33566, editor = {{Rezat, Sara}}, title = {{{Lesen und Schreiben: digital. Praxis Deutsch 292}}}, year = {{2022}}, } @article{33679, author = {{Zhang, Ruiming and Ruan, Wei and Yu, Junyao and Gao, Libo and Berger, Helmuth and Forró, László and Watanabe, Kenji and Taniguchi, Takashi and Ranjbar, Ahmad and Belosludov, Rodion V. and Kühne, Thomas and Bahramy, Mohammad Saeed and Xi, Xiaoxiang}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{8}}, publisher = {{American Physical Society (APS)}}, title = {{{Second-harmonic generation in atomically thin 1TTiSe2 and its possible origin from charge density wave transitions}}}, doi = {{10.1103/physrevb.105.085409}}, volume = {{105}}, year = {{2022}}, } @article{33682, author = {{Khazaei, Mohammad and Ranjbar, Ahmad and Kang, Yoon‐Gu and Liang, Yunye and Khaledialidusti, Rasoul and Bae, Soungmin and Raebiger, Hannes and Wang, Vei and Han, Myung Joon and Mizoguchi, Hiroshi and Bahramy, Mohammad S. and Kühne, Thomas and Belosludov, Rodion V. and Ohno, Kaoru and Hosono, Hideo}}, issn = {{1616-301X}}, journal = {{Advanced Functional Materials}}, keywords = {{Electrochemistry, Condensed Matter Physics, Biomaterials, Electronic, Optical and Magnetic Materials}}, number = {{20}}, publisher = {{Wiley}}, title = {{{Electronic Structures of Group III–V Element Haeckelite Compounds: A Novel Family of Semiconductors, Dirac Semimetals, and Topological Insulators}}}, doi = {{10.1002/adfm.202110930}}, volume = {{32}}, year = {{2022}}, } @article{33676, author = {{Schulze Lammers, Bertram and López-Salas, Nieves and Stein Siena, Julya and Mirhosseini, Hossein and Yesilpinar, Damla and Heske, Julian Joachim and Kühne, Thomas and Fuchs, Harald and Antonietti, Markus and Mönig, Harry}}, issn = {{1936-0851}}, journal = {{ACS Nano}}, keywords = {{General Physics and Astronomy, General Engineering, General Materials Science}}, number = {{9}}, pages = {{14284--14296}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Real-Space Identification of Non-Noble Single Atomic Catalytic Sites within Metal-Coordinated Supramolecular Networks}}}, doi = {{10.1021/acsnano.2c04439}}, volume = {{16}}, year = {{2022}}, } @unpublished{33678, abstract = {{Accelerated chemistry at the interface with water has received increasing attention. The mechanisms behind the enhanced reactivity On-Water are not yet clear. In this work we use a Langevin scheme in the spirit of second generation Car-Parrinello to accelerate the second-order density functional Tight-Binding (DFTB2) method in order to investigate the free energy of two Diels-Alder reaction On-Water: the cycloaddition between cyclopentadiene and ethyl cinnamate or thionocinnamate. The only difference between the reactants is the substitution of a carbonyl oxygen for a thiocarbonyl sulfur, making possible the distinction between them as strong and weak hydrogen-bond acceptors. We find a different mechanism for the reaction during the transition states and uncover the role of hydrogen bonds along with the reaction path. Our results suggest that acceleration of Diels-Alder reactions do not arise from an increased number of hydrogen bonds at the transition state and charge transfer plays a significant role. However, the presence of water and hydrogen-bonds is determinant for the catalysis of these reactions.}}, author = {{Henao Aristizabal, Andres and Gohar, Yomna and Whilhelm, René and Kühne, Thomas}}, publisher = {{American Chemical Society (ACS)}}, title = {{{On the Role of Hydrogen Bond Strength and Charge Transfer of a Diels-Alder Reaction On-Water: Semiempirical and Free Energy Calculations.}}}, year = {{2022}}, } @article{33680, author = {{Khajehpasha, Ehsan Rahmatizad and Finkler, Jonas A. and Kühne, Thomas and Ghasemi, Alireza}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{14}}, publisher = {{American Physical Society (APS)}}, title = {{{CENT2: Improved charge equilibration via neural network technique}}}, doi = {{10.1103/physrevb.105.144106}}, volume = {{105}}, year = {{2022}}, } @article{33686, author = {{Elizabeth, Amala and Sahoo, Sudhir K. and Phirke, Himanshu and Kodalle, Tim and Kühne, Thomas and Audinot, Jean-Nicolas and Wirtz, Tom and Redinger, Alex and Kaufmann, Christian A. and Mirhosseini, Hossein and Mönig, Harry}}, issn = {{1944-8244}}, journal = {{ACS Applied Materials & Interfaces}}, keywords = {{General Materials Science}}, number = {{29}}, pages = {{34101--34112}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Surface Passivation and Detrimental Heat-Induced Diffusion Effects in RbF-Treated Cu(In,Ga)Se2 Solar Cell Absorbers}}}, doi = {{10.1021/acsami.2c08257}}, volume = {{14}}, year = {{2022}}, } @article{33689, author = {{Raghuwanshi, Mohit and Chugh, Manjusha and Sozzi, Giovanna and Kanevce, Ana and Kühne, Thomas and Mirhosseini, Hossein and Wuerz, Roland and Cojocaru‐Mirédin, Oana}}, issn = {{0935-9648}}, journal = {{Advanced Materials}}, keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}}, number = {{37}}, publisher = {{Wiley}}, title = {{{Fingerprints Indicating Superior Properties of Internal Interfaces in Cu(In,Ga)Se 2 Thin‐Film Solar Cells}}}, doi = {{10.1002/adma.202203954}}, volume = {{34}}, year = {{2022}}, } @article{33690, author = {{Ibaceta-Jaña, Josefa and Chugh, Manjusha and Novikov, Alexander S. and Mirhosseini, Hossein and Kühne, Thomas and Szyszka, Bernd and Wagner, Markus R. and Muydinov, Ruslan}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, keywords = {{Surfaces, Coatings and Films, Physical and Theoretical Chemistry, General Energy, Electronic, Optical and Magnetic Materials}}, number = {{38}}, pages = {{16215--16226}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Do Lead Halide Hybrid Perovskites Have Hydrogen Bonds?}}}, doi = {{10.1021/acs.jpcc.2c02984}}, volume = {{126}}, year = {{2022}}, } @article{33683, author = {{Lepre, Enrico and Heske, Julian Joachim and Nowakowski, Michal and Scoppola, Ernesto and Zizak, Ivo and Heil, Tobias and Kühne, Thomas and Antonietti, Markus and López-Salas, Nieves and Albero, Josep}}, issn = {{2211-2855}}, journal = {{Nano Energy}}, keywords = {{Electrical and Electronic Engineering, General Materials Science, Renewable Energy, Sustainability and the Environment}}, publisher = {{Elsevier BV}}, title = {{{Ni-based electrocatalysts for unconventional CO2 reduction reaction to formic acid}}}, doi = {{10.1016/j.nanoen.2022.107191}}, volume = {{97}}, year = {{2022}}, } @misc{33688, author = {{Balos, Vasileios and Kaliannan, Naveen Kumar and Elgabarty, Hossam and Wolf, Martin and Kühne, Thomas and Sajadi, Mohsen}}, publisher = {{LibreCat University}}, title = {{{Time resolved THz-Raman spectroscopy reveals that cations and anions distinctly modify intermolecular interactions of water}}}, doi = {{10.5281/ZENODO.6514905}}, year = {{2022}}, } @article{33692, abstract = {{Abstract An individual’s relation to time may be an important driver of pro-environmental behaviour. We studied whether young individual’s gender and time-orientation are associated with pro-environmental behaviour. In a controlled laboratory environment with students in Germany, participants earned money by performing a real-effort task and were then offered the opportunity to invest their money into an environmental project that supports climate protection. Afterwards, we controlled for their time-orientation. In this consequential behavioural setting, we find that males who scored higher on future-negative orientation showed significantly more pro-environmental behaviour compared to females who scored higher on future-negative orientation and males who scored lower on future-negative orientation. Interestingly, our results are completely reversed when it comes to past-positive orientation. These findings have practical implications regarding the most appropriate way to address individuals in order to achieve more pro-environmental behaviour.}}, author = {{Hoffmann, Christin and Hoppe, Julia Amelie and Ziemann, Niklas}}, issn = {{1748-9326}}, journal = {{Environmental Research Letters}}, keywords = {{Public Health, Environmental and Occupational Health, General Environmental Science, Renewable Energy, Sustainability and the Environment}}, number = {{10}}, publisher = {{IOP Publishing}}, title = {{{Who has the future in mind? Gender, time perspectives, and pro-environmental behaviour}}}, doi = {{10.1088/1748-9326/ac9296}}, volume = {{17}}, year = {{2022}}, } @techreport{33702, abstract = {{Im Rahmen dieser Studie wird der Status Quo des KI-Einsatzes in der industriellen Arbeitswelt in der Region OstWestfalenLippe erfasst und beschrieben. Dadurch wird eine Grundlage geschaffen, um eine zielführende Unterstützung der Gestaltung von durch Künstliche Intelligenz (KI) gestützter Arbeitsprozesse in Unternehmen zu ermöglichen, indem beispielsweise bedarfsbezogene Maßnahmen entwickelt und durchgeführt sowie weiterer Forschungsbedarf aufgezeigt wird. Die Befragung wurde im Jahr 2021 von dem Kompetenzzentrum Arbeitswelt.Plus sowie dem Spitzencluster it’s OWL initiiert. Dabei sind drei Zielgruppen – Unternehmensleitung, Personalabteilung (HR) sowie Arbeitnehmer*innen – adressiert worden. Insgesamt nahmen 317 Personen aus 89 verschiedenen Unternehmen bzw. Organisationen an der Befragung teil – zu 38 % Unternehmer*innen, zu 13 % Personaler*innen und zu 49 % Arbeitnehmer*innen. Die meisten der Teilnehmenden stammten aus der Elektroindustrie, dem Maschinenbau sowie dem Informations- und Kommunikationstechnologie (IKT)-Sektor. Die Befragungsergebnisse zeigen, dass sich die meisten Unternehmen in der Anfangsphase der KI-Nutzung befinden. Zwischen einzelnen Unternehmensbereichen und verschiedenen Branchen zeigen sich gewisse Unterschiede in der Nutzungsphase. Die Befragten stehen aktuell vor der Nutzung von vor allem teilautonomen KI-Systemen, die ausführende und analytische menschliche Tätigkeitenbeispielsweise durch Informationsbereitstellungen unterstützen. Wesentliche Ziele der KI-Nutzung sind die Effizienzsteigerung, Qualitätsverbesserung, Entscheidungsoptimierung sowie Unterstützung der Arbeitnehmer*innen. Allerdings werden in allen Unternehmen die fehlende Expertise sowie insgesamt die Komplexität des Themenfelds als Hinderungsgründe identifiziert. In allen Unternehmen und allen Unternehmensbereichen werden hohe Auswirkungen durch KI erwartet. Auf die Arbeitsgestaltung werden insgesamt eher positive Auswirkungen erwartet. Die Befragten schätzen die Bedeutung von KI, ihre Aufgeschlossenheit sowie ihr Vertrauen gegenüber KI als insgesamt hoch ein, ihr Verständnis von KI dagegen eher als gering. Tendenziell zeigt sich eine große Diskrepanz zwischen Selbst- und Fremdbild mit einer teils deutlich negativeren Wahrnehmung anderer. Die Befragten erwarten außerdem steigende Kompetenzanforderungen sowie einen hohen Weiterbildungsbedarf, insbesondere bezüglich des grundlegenden Verständnisses über KI. In den wenigsten Unternehmen existiert jedoch ein gezieltes Weiterbildungsangebot. Die Erkenntnisse aus der Befragung fließen im Rahmen des Kompetenzzentrums Arbeitswelt.Plus in die gezielte Gestaltung und Einführung KI-gestützter Arbeitsformen sowie bedarfsgerechter Unterstützungsangebote ein. Die hohe Komplexität der KI-Einführung sowie die sowohl technischen als auch mitarbeiterbezogenen Herausforderungen verdeutlichen den Bedarf für eine soziotechnische Perspektive und ein systematisches Vorgehen bei der Gestaltung dieses vielschichtigen Themenfelds.}}, author = {{Papenkordt, Jörg and Gabriel, Stefan and Thommes, Kirsten and Dumitrescu, Roman}}, publisher = {{Kompetenzzentrum Arbeitswelt.Plus}}, title = {{{Künstliche Intelligenz in der industriellen Arbeitswelt - Studie zum Status Quo in der Region OstWestfalenLippe}}}, doi = {{10.55594/tmao3234}}, year = {{2022}}, } @article{33701, abstract = {{Abstract Künstliche Intelligenz bietet großes Potenzial im Engineering. Der Einsatz gestattet insbesondere für Wissensarbeiter eine effiziente Arbeitsteilung, in der beispielsweise fehleranfällige und repetitive Aktivitäten unterstützt werden. Eine erfolgreiche Einführung bedarf einer vorangehenden Analyse von nutzenstiftenden Einsatzpotenzialen, bei der alle Anwendenden frühzeitig einbezogen werden. Der folgende Beitrag verdeutlicht dieses Vorgehen anhand eines realen Beispiels im Sondermaschinenbau.}}, author = {{Kharatyan, Aschot and Humpert, Lynn and Anacker, Harald and Dumitrescu, Roman and Wäschle, Moritz and Albers, Albert and Horstmeyer, Sarah}}, issn = {{2511-0896}}, journal = {{Zeitschrift für wirtschaftlichen Fabrikbetrieb}}, keywords = {{Management Science and Operations Research, Strategy and Management, General Engineering}}, number = {{6}}, pages = {{427--431}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Künstliche Intelligenz im Engineering}}}, doi = {{10.1515/zwf-2022-1074}}, volume = {{117}}, year = {{2022}}, } @article{33705, abstract = {{AbstractThe ongoing digitalization of products offers product managers new potentials to plan future product generations based on data from the use phase instead of assumptions. However, product managers often face difficulties in identifying promising opportunities for analyzing use phase data. In this paper, we propose a method for planning the analysis of use phase data in product planning. It leads product managers from the identification of promising investigation needs to the derivation of specific use cases. The application of the method is shown using the example of a manufacturing company.}}, author = {{Meyer, Maurice and Wiederkehr, Ingrid and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2732-527X}}, journal = {{Proceedings of the Design Society}}, pages = {{753--762}}, publisher = {{Cambridge University Press (CUP)}}, title = {{{Planning the Analysis of Use Phase Data in Product Planning}}}, doi = {{10.1017/pds.2022.77}}, volume = {{2}}, year = {{2022}}, } @inproceedings{33708, abstract = {{The megatrend digitalization turns mechatronic products into continuous collectors and generators of use phase data. By analyzing this data, manufacturers can uncover valuable insights about the products and the users. Especially in product planning, these insights could be used to plan promising future product generations. The systematic exploitation of data analytics results, however, represents a serious challenge, as research on the topic is still scarce. In this paper, we present 13 design principles for exploiting data analytics results in product planning. The results are based on a systematic literature review and a workshop with a research consortium. The evaluation of the design principles is demonstrated with a real case of a manufacturing company. The identified design principles represent a first contribution to a still scarcely explored research field.}}, author = {{Meyer, Maurice and Fichtler, Timm and Koldewey, Christian and Dumitrescu, Roman}}, booktitle = {{ AMCIS 2022 Proceedings}}, location = {{Minneapolis}}, title = {{{How can Data Analytics Results be Exploited in the Early Phase of Product Development? 13 Design Principles for Data-Driven Product Planning}}}, year = {{2022}}, } @article{33707, author = {{Meyer, Maurice and Panzner, Melina and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{1053--1058}}, publisher = {{Elsevier BV}}, title = {{{17 Use Cases for Analyzing Use Phase Data in Product Planning of Manufacturing Companies}}}, doi = {{10.1016/j.procir.2022.05.107}}, volume = {{107}}, year = {{2022}}, } @misc{33709, author = {{Wiecher, Carsten and Mandel, Constantin and Günther, Matthias and Fischbach, Jannik and Greenyer, Joel and Greinert, Matthias and Wolff, Carsten and Dumitrescu, Roman and Mendez, Daniel and Albers, Albert}}, booktitle = {{arXiv preprint}}, title = {{{Model-based Analysis and Specification of Functional Requirements and Tests for Complex Automotive Systems}}}, year = {{2022}}, } @article{33714, abstract = {{AbstractIndustry 4.0 promises many potentials in production. Examples are a data-driven optimization of production processes of individual machines, driverless transport systems, and assistance systems. Nevertheless, companies are still hesitant to invest in Industry 4.0 applications. Studies show that one of the main reasons for that is the unclear economic benefit. In this work, we present a systematic approach for the evaluation of Industry 4.0 applications in production. The main goal of the systematic is to create transparency over the evaluation process of an investment in an Industry 4.0 application in production. The evaluation of a concrete technical solution in an existing production system is supported. As a theoretical foundation, a characterization of investments in Industry 4.0 applications is given. From that, a procedure model is derived. It puts the activities to be carried out, the tools to be used and results in a temporal context. The application of the systematic is shown on the basis of an application example.}}, author = {{Joppen, Robert and Kühn, Arno and Förster, Magdalena and Dumitrescu, Roman}}, issn = {{1868-7865}}, journal = {{Journal of the Knowledge Economy}}, keywords = {{Economics and Econometrics}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Evaluation of Industry 4.0 Applications in Production}}}, doi = {{10.1007/s13132-022-00959-2}}, year = {{2022}}, } @article{33713, abstract = {{AbstractThe development of technical systems requires close cooperation of stakeholders from different disciplines. This collaboration takes place in workshops. Driven by digitalization and by the current pandemic such workshops take place primarily online. Suitable collaboration tools and methods are crucial to success. At the beginning of such workshops, use and damage scenarios are identified. In this paper, we presented a method and tool for identifying and modeling use and damage scenarios, which we evaluated in 14 online workshops with a total of 118 participants over a period of almost 3 years.}}, author = {{Japs, Sergej and Schmidt, Sebastian and Kargl, Frank and Kaiser, Lydia and Kharatyan, Aschot and Dumitrescu, Roman}}, issn = {{2732-527X}}, journal = {{Proceedings of the Design Society}}, pages = {{1599--1608}}, publisher = {{Cambridge University Press (CUP)}}, title = {{{Collaborative Modeling of Use Case & Damage Scenarios in Online Workshops Using a 3D Environment}}}, doi = {{10.1017/pds.2022.162}}, volume = {{2}}, year = {{2022}}, } @article{33715, author = {{Japs, Sergej and Kargl, Frank and Anacker, Harald and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{293--298}}, publisher = {{Elsevier BV}}, title = {{{Why make it hard? - Usage of aggregated statistical data for risk assessment of damage scenarios in the context of ISO/SAE 21434}}}, doi = {{10.1016/j.procir.2022.05.252}}, volume = {{109}}, year = {{2022}}, } @inproceedings{33712, author = {{Mager, Thomas and Jürgenhake, Christoph and Dumitrescu, Roman}}, booktitle = {{2022 14th German Microwave Conference (GeMiC)}}, location = {{Ulm}}, pages = {{224--227}}, publisher = {{IEEE}}, title = {{{Efficient method for determining substrate parameters of additive manufactured spatial circuit carriers}}}, year = {{2022}}, } @inproceedings{33711, author = {{Gollner, Denis and Klausmann, Tobias and Rasor, Rik and Dumitrescu, Roman}}, booktitle = {{2022 IEEE 5th International Conference on Industrial Cyber-Physical Systems (ICPS)}}, publisher = {{IEEE}}, title = {{{Use Case Driven Digital Twin Generation}}}, doi = {{10.1109/icps51978.2022.9816907}}, year = {{2022}}, } @article{33718, author = {{Gabriel, Stefan and Bentler, Dominik and Grote, Eva-Maria and Junker, Caroline and Wendischhoff, David Meyer zu and Bansmann, Michael and Latos, Benedikt and Hobscheidt, Daniela and Kühn, Arno and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{431--436}}, publisher = {{Elsevier BV}}, title = {{{Requirements analysis for an intelligent workforce planning system: a socio-technical approach to design AI-based systems}}}, doi = {{10.1016/j.procir.2022.05.274}}, volume = {{109}}, year = {{2022}}, } @article{33716, author = {{Förster, Magdalena and Kürpick, Christian and Hobscheidt, Daniela and Kühn, Arno and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{322--327}}, publisher = {{Elsevier BV}}, title = {{{Cross-industry methods for strategic planning of the digital transformation of small and medium sized enterprises}}}, doi = {{10.1016/j.procir.2022.05.257}}, volume = {{109}}, year = {{2022}}, } @article{33717, author = {{Kharatyan, Aschot and Günther, Matthias and Anacker, Harald and Japs, Sergej and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{586--591}}, publisher = {{Elsevier BV}}, title = {{{Security- and Safety-Driven Functional Architecture Development Exemplified by Automotive Systems Engineering}}}, doi = {{10.1016/j.procir.2022.05.299}}, volume = {{109}}, year = {{2022}}, } @article{33719, author = {{Humpert, Lynn and Röhm, Benjamin and Anacker, Harald and Dumitrescu, Roman and Anderl, Reiner}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{215--220}}, publisher = {{Elsevier BV}}, title = {{{Method for direct end customer integration into the agile product development}}}, doi = {{10.1016/j.procir.2022.05.239}}, volume = {{109}}, year = {{2022}}, } @inbook{33728, author = {{Bielak, C. R. and Böhnke, M. and Bobbert, M. and Meschut, G.}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Development of a Numerical 3D Model for Analyzing Clinched Joints in Versatile Process Chains}}}, doi = {{10.1007/978-3-031-06212-4_15}}, year = {{2022}}, } @inbook{33740, author = {{KOUAGOU, N'Dah Jean and Heindorf, Stefan and Demir, Caglar and Ngonga Ngomo, Axel-Cyrille}}, booktitle = {{The Semantic Web}}, isbn = {{9783031069802}}, issn = {{0302-9743}}, publisher = {{Springer International Publishing}}, title = {{{Learning Concept Lengths Accelerates Concept Learning in ALC}}}, doi = {{10.1007/978-3-031-06981-9_14}}, year = {{2022}}, } @inproceedings{29290, abstract = {{Classifying nodes in knowledge graphs is an important task, e.g., predicting missing types of entities, predicting which molecules cause cancer, or predicting which drugs are promising treatment candidates. While black-box models often achieve high predictive performance, they are only post-hoc and locally explainable and do not allow the learned model to be easily enriched with domain knowledge. Towards this end, learning description logic concepts from positive and negative examples has been proposed. However, learning such concepts often takes a long time and state-of-the-art approaches provide limited support for literal data values, although they are crucial for many applications. In this paper, we propose EvoLearner - an evolutionary approach to learn ALCQ(D), which is the attributive language with complement (ALC) paired with qualified cardinality restrictions (Q) and data properties (D). We contribute a novel initialization method for the initial population: starting from positive examples (nodes in the knowledge graph), we perform biased random walks and translate them to description logic concepts. Moreover, we improve support for data properties by maximizing information gain when deciding where to split the data. We show that our approach significantly outperforms the state of the art on the benchmarking framework SML-Bench for structured machine learning. Our ablation study confirms that this is due to our novel initialization method and support for data properties.}}, author = {{Heindorf, Stefan and Blübaum, Lukas and Düsterhus, Nick and Werner, Till and Golani, Varun Nandkumar and Demir, Caglar and Ngonga Ngomo, Axel-Cyrille}}, booktitle = {{WWW}}, pages = {{818--828}}, publisher = {{ACM}}, title = {{{EvoLearner: Learning Description Logics with Evolutionary Algorithms}}}, year = {{2022}}, } @inbook{33742, author = {{Zierau, Cornelia and Kofer, Martina}}, booktitle = {{Interkulturelles Lernen mit Kinder- und Jugendliteratur (in Vorbereitung)}}, editor = {{Mikota, Jana and Sudermann, Andy and Heise, Ines}}, title = {{{Verhandlungen sexueller und kultureller Fremd- und Selbstbestimmungen in Kristina Aamand’s interkulturellem Adoleszenzroman „Wenn Worte meine Waffe wären“}}}, year = {{2022}}, } @inbook{33745, author = {{Zierau, Cornelia}}, booktitle = {{Türkisch-deutsche Studien Jahrbuch 2020: Wertorientierungen}}, editor = {{Ozil, Seyda and Hofmann, Michael and Laut, Jens-Peter and Dayioglu-Yücel, Yasemin and Zierau, Cornelia and Uca, Didem }}, pages = {{69--77}}, publisher = {{Universitätsverlag}}, title = {{{Wertorientierung und Werteverhandlungen in Emine Sevgi Özdamars Roman „Das Leben ist eine Karawanserei“}}}, year = {{2022}}, } @book{33799, editor = {{Zierau, Cornelia and Ozil, Seyda and Hofmann, Michael and Laut, Jens-Peter and Dayioglu-Yücel, Yasemin and Uca, Didem}}, publisher = {{Universitätsverlag}}, title = {{{Türkisch-deutsche Studien Jahrbuch 2020: Wertorientierungen}}}, year = {{2022}}, } @article{33810, author = {{Koldewey, Christian and Hobscheidt, Daniela and Pierenkemper, Christoph and Kühn, Arno and Dumitrescu, Roman}}, journal = {{Sci}}, number = {{4}}, publisher = {{MDPI}}, title = {{{Increasing Firm Performance through Industry 4.0—A Method to Define and Reach Meaningful Goals}}}, doi = {{https://doi.org/10.3390/sci4040039}}, volume = {{39}}, year = {{2022}}, } @article{33720, author = {{Göllner, Denis and Rasor, Rik and Anacker, Harald and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{1089--1094}}, publisher = {{Elsevier BV}}, title = {{{Collaborative Modeling of Interoperable Digital Twins in a SoS Context}}}, doi = {{10.1016/j.procir.2022.05.113}}, volume = {{107}}, year = {{2022}}, } @article{30193, abstract = {{The successful planning of future product generations requires reliable insights into the actual products’ problems and potentials for improvement. A valuable source for these insights is the product use phase. In practice, product planners are often forced to work with assumptions and speculations as insights from the use phase are insufficiently identified and documented. A new opportunity to address this problem arises from the ongoing digitalization that enables products to generate and collect data during their utilization. Analyzing these data could enable their manufacturers to generate and exploit insights concerning product performance and user behavior, revealing problems and potentials for improvement. However, research on analyzing use phase data in product planning of manufacturing companies is scarce. Therefore, we conducted an exploratory interview study with decision-makers of eight manufacturing companies. The result of this paper is a detailed description of the potentials and challenges that the interviewees associated with analyzing use phase data in product planning. The potentials explain the intended purpose and generic application examples. The challenges concern the products, the data, the customers, the implementation, and the employees. By gathering the potentials and challenges through expert interviews, our study structures the topic from the perspective of the potential users and shows the needs for future research.}}, author = {{Meyer, Maurice and Fichtler, Timm and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{0890-0604}}, journal = {{Artificial Intelligence for Engineering Design, Analysis and Manufacturing}}, keywords = {{Artificial Intelligence, Industrial and Manufacturing Engineering}}, publisher = {{Cambridge University Press (CUP)}}, title = {{{Potentials and challenges of analyzing use phase data in product planning of manufacturing companies}}}, doi = {{10.1017/s0890060421000408}}, volume = {{36}}, year = {{2022}}, } @article{33710, abstract = {{Abstract Um global erfolgreich zu bleiben, wird es bald nicht mehr ausreichen, Kriterien wie ein gutes Produktdesign zu erfüllen. Stattdessen muss der Kundennutzen kontinuierlich über den Produktlebenszyklus hinaus gesteigert werden. Tech-Konzerne verzeichnen bereits Erfolge und verkörpern den Wandel schon heute. Vor diesem Hintergrund ist ein neues Leitbild in der Entwicklung und dem Betrieb von zukünftigen, technischen Systemen erforderlich. EngOps soll diesen Bedarf decken und steht für die agile Kollaboration zwischen Engineering und Operations. Alle Teile des Unternehmens sollen ständig miteinander kooperieren, um so beispielsweise wandelbare Produkte auch nach dem Verkauf entwickeln zu können.}}, author = {{Anacker, Harald and Dumitrescu, Roman and Michels, Nico and Rasor, Rik}}, issn = {{2511-0896}}, journal = {{Zeitschrift für wirtschaftlichen Fabrikbetrieb}}, keywords = {{Management Science and Operations Research, Strategy and Management, General Engineering}}, number = {{6}}, pages = {{405--409}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{EngOps – Ein Leitbild für das agile Zusammenwirken von Engineering und Operations}}}, doi = {{10.1515/zwf-2022-1069}}, volume = {{117}}, year = {{2022}}, } @article{33833, author = {{Kim, Sanghoon and Pathak, Sachin and Rhim, Sonny H. and Cha, Jongin and Jekal, Soyoung and Hong, Soon Cheol and Lee, Hyun Hwi and Park, Sung‐Hun and Lee, Han‐Koo and Park, Jae‐Hoon and Lee, Soogil and Steinrück, Hans-Georg and Mehta, Apurva and Wang, Shan X. and Hong, Jongill}}, issn = {{2198-3844}}, journal = {{Advanced Science}}, keywords = {{General Physics and Astronomy, General Engineering, Biochemistry, Genetics and Molecular Biology (miscellaneous), General Materials Science, General Chemical Engineering, Medicine (miscellaneous)}}, number = {{24}}, pages = {{2201749}}, publisher = {{Wiley}}, title = {{{Giant Orbital Anisotropy with Strong Spin–Orbit Coupling Established at the Pseudomorphic Interface of the Co/Pd Superlattice}}}, doi = {{10.1002/advs.202201749}}, volume = {{9}}, year = {{2022}}, } @article{33835, abstract = {{ Nowadays, an increasing number of applications uses deserialization. This technique, based on rebuilding the instance of objects from serialized byte streams, can be dangerous since it can open the application to attacks such as remote code execution (RCE) if the data to deserialize is originating from an untrusted source. Deserialization vulnerabilities are so critical that they are in OWASP’s list of top 10 security risks for web applications. This is mainly caused by faults in the development process of applications and by flaws in their dependencies, i.e., flaws in the libraries used by these applications. No previous work has studied deserialization attacks in-depth: How are they performed? How are weaknesses introduced and patched? And for how long are vulnerabilities present in the codebase? To yield a deeper understanding of this important kind of vulnerability, we perform two main analyses: one on attack gadgets, i.e., exploitable pieces of code, present in Java libraries, and one on vulnerabilities present in Java applications. For the first analysis, we conduct an exploratory large-scale study by running 256 515 experiments in which we vary the versions of libraries for each of the 19 publicly available exploits. Such attacks rely on a combination of gadgets present in one or multiple Java libraries. A gadget is a method which is using objects or fields that can be attacker-controlled. Our goal is to precisely identify library versions containing gadgets and to understand how gadgets have been introduced and how they have been patched. We observe that the modification of one innocent-looking detail in a class – such as making it public – can already introduce a gadget. Furthermore, we noticed that among the studied libraries, 37.5% are not patched, leaving gadgets available for future attacks. For the second analysis, we manually analyze 104 deserialization vulnerabilities CVEs to understand how vulnerabilities are introduced and patched in real-life Java applications. Results indicate that the vulnerabilities are not always completely patched or that a workaround solution is proposed. With a workaround solution, applications are still vulnerable since the code itself is unchanged.}}, author = {{Sayar, Imen and Bartel, Alexandre and Bodden, Eric and Le Traon, Yves}}, issn = {{1049-331X}}, journal = {{ACM Transactions on Software Engineering and Methodology}}, keywords = {{Software}}, publisher = {{Association for Computing Machinery (ACM)}}, title = {{{An In-depth Study of Java Deserialization Remote-Code Execution Exploits and Vulnerabilities}}}, doi = {{10.1145/3554732}}, year = {{2022}}, } @article{33836, author = {{Piskachev, Goran and Späth, Johannes and Budde, Ingo and Bodden, Eric}}, journal = {{Empirical Software Engineering}}, number = {{5}}, pages = {{1–33}}, publisher = {{Springer}}, title = {{{Fluently specifying taint-flow queries with fluentTQL}}}, volume = {{27}}, year = {{2022}}, } @inproceedings{33838, author = {{Krishnamurthy, Ranjith and Piskachev, Goran and Bodden, Eric}}, title = {{{To what extent can we analyze Kotlin programs using existing Java taint analysis tools?}}}, year = {{2022}}, } @inproceedings{33837, author = {{Piskachev, Goran and Dziwok, Stefan and Koch, Thorsten and Merschjohann, Sven and Bodden, Eric}}, title = {{{How far are German companies in improving security through static program analysis tools?}}}, year = {{2022}}, } @article{20731, abstract = {{We present a novel algorithm that allows us to gain detailed insight into the effects of sparsity in linear and nonlinear optimization, which is of great importance in many scientific areas such as image and signal processing, medical imaging, compressed sensing, and machine learning (e.g., for the training of neural networks). Sparsity is an important feature to ensure robustness against noisy data, but also to find models that are interpretable and easy to analyze due to the small number of relevant terms. It is common practice to enforce sparsity by adding the ℓ1-norm as a weighted penalty term. In order to gain a better understanding and to allow for an informed model selection, we directly solve the corresponding multiobjective optimization problem (MOP) that arises when we minimize the main objective and the ℓ1-norm simultaneously. As this MOP is in general non-convex for nonlinear objectives, the weighting method will fail to provide all optimal compromises. To avoid this issue, we present a continuation method which is specifically tailored to MOPs with two objective functions one of which is the ℓ1-norm. Our method can be seen as a generalization of well-known homotopy methods for linear regression problems to the nonlinear case. Several numerical examples - including neural network training - demonstrate our theoretical findings and the additional insight that can be gained by this multiobjective approach.}}, author = {{Bieker, Katharina and Gebken, Bennet and Peitz, Sebastian}}, journal = {{IEEE Transactions on Pattern Analysis and Machine Intelligence}}, number = {{11}}, pages = {{7797--7808}}, publisher = {{IEEE}}, title = {{{On the Treatment of Optimization Problems with L1 Penalty Terms via Multiobjective Continuation}}}, doi = {{10.1109/TPAMI.2021.3114962}}, volume = {{44}}, year = {{2022}}, } @article{23566, author = {{Kundisch, Dennis and Muntermann, J. and Oberländer, A. M. and Rau, D. and Röglinger, M. and Schoormann, T. and Szopinski, Daniel}}, journal = {{Business & Information Systems Engineering}}, number = {{4}}, pages = {{421--439}}, title = {{{An update for taxonomy designers: Methodological guidance from information systems research}}}, volume = {{64}}, year = {{2022}}, } @book{33842, author = {{Eke, Norbert and Zaimoglu , Feridun}}, publisher = {{Königshausen und Neumann}}, title = {{{Durchdrungenheit. Texte und Gespräche.}}}, year = {{2022}}, } @article{33859, author = {{Moritzer, Elmar and Elsner, Christian Lennart}}, journal = {{Macromolecular Symposia}}, location = {{Bukarest}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Investigation and Improvement of Processing Parameters of a Copper-Filled Polymer Filament in Fused Filament Fabrication as a Basis for the Fabrication of Low-Porosity Metal Parts}}}, doi = {{https://doi.org/10.1002/masy.202100390}}, volume = {{404}}, year = {{2022}}, } @article{33861, author = {{Moritzer, Elmar and Wächter, Julian}}, journal = {{Macromolecular Symposia}}, location = {{Bukarest}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Development of a Procedure for the Assessment of Material Potentials under Consideration of the Weld Seam Quality for Multi-Material Applications in the FDM Process}}}, doi = {{https://doi.org/10.1002/masy.202100389}}, volume = {{404}}, year = {{2022}}, } @book{33865, abstract = {{Lightweight materials such as aluminium and ultra-high-strength steel are increasingly being used in modern material mixed design in car body construction. As a fixing method for hybrid joining with structural adhesive, clinching has the advantage over other mechanical joining technologies that different materials can be joined without an auxiliary joining part and pre-hole. Due to the large degree of deformation in the joining partners, strong in-plane and out-of-plane material flows occur during the setting process, which can lead to plastic deformation. The aim of this work is the further development of shear-clinching for low-deformation of aluminium-steel joints. To gain a basic understanding of the joint deformation, the deformation of the joint partners during the setting process is identified step by step. Based on the knowledge gained, the deformation-related influencing factors are investigated experimentally. Thus, optimisation approaches as well as suggested handling methods for the production of a low-deformation shear-clinching joint are derived. For the realisation of the common narrow flange, which is to be characterised as deformation-sensitive due to a small edge distance, a numerically supported tool modification is carried out and subsequently experimentally validated. }}, author = {{Han, Daxin}}, title = {{{Deformationsarme Fügeverbindungen mittels prozessoptimiertem Schneidclinchen}}}, year = {{2022}}, } @misc{17090, author = {{Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Birk, Carolin and Henning, Bernd}}, publisher = {{International Association for Computational Mechanics (IACM)}}, title = {{{Differentiation of an SBFE model in the context of material parameter determination}}}, year = {{2022}}, } @book{33876, editor = {{Famula, Marta and Witschel, Verena}}, publisher = {{Brill | Fink}}, title = {{{Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000, (= Drama zwischen Text und Bühne 1)}}}, year = {{2022}}, } @inproceedings{33884, author = {{Laux, Florian and Kundisch, Dennis}}, location = {{Copenhagen, Denmark}}, title = {{{Judgment or Choice? An Experimental Comparison of Evaluation Approaches for External Crowdvoting}}}, year = {{2022}}, } @article{32326, abstract = {{AbstractGenetic factors are relevant for both eating disorders and body weight regulation. A recent genome-wide association study (GWAS) for anorexia nervosa (AN) detected eight genome-wide significant chromosomal loci. One of these loci, rs10747478, was also genome-wide and significantly associated with body mass index (BMI). The nearest coding gene is the Polypyrimidine Tract Binding Protein 2 gene (PTBP2). To detect mutations in PTBP2, Sanger sequencing of the coding region was performed in 192 female patients with AN (acute or recovered) and 191 children or adolescents with (extreme) obesity. Twenty-five variants were identified. Twenty-three of these were predicted to be pathogenic or functionally relevant in at least one in silico tool. Two novel synonymous variants (p.Ala77Ala and p.Asp195Asp), one intronic SNP (rs188987764), and the intronic deletion (rs561340981) located in the highly conserved region of PTBP2 may have functional consequences. Ten of 20 genes interacting with PTBP2 were studied for their impact on body weight regulation based on either previous functional studies or GWAS hits for body weight or BMI. In a GWAS for BMI (Pulit et al. 2018), the number of genome-wide significant associations at the PTBP2 locus was different between males (60 variants) and females (two variants, one of these also significant in males). More than 65% of these 61 variants showed differences in the effect size pertaining to BMI between sexes (absolute value of Z-score >2, two-sided p < 0.05). One LD block overlapping 5′UTR and all coding regions of PTBP2 comprises 56 significant variants in males. The analysis based on sex-stratified BMI GWAS summary statistics implies that PTBP2 may have a more pronounced effect on body weight regulation in males than in females.}}, author = {{Zheng, Yiran and Rajcsanyi, Luisa Sophie and Herpertz-Dahlmann, Beate and Seitz, Jochen and de Zwaan, Martina and Herzog, Wolfgang and Ehrlich, Stefan and Zipfel, Stephan and Giel, Katrin and Egberts, Karin and Burghardt, Roland and Föcker, Manuel and Al-Lahham, Saad and Peters, Triinu and Libuda, Lars and Antel, Jochen and Hebebrand, Johannes and Hinney, Anke}}, issn = {{2158-3188}}, journal = {{Translational Psychiatry}}, keywords = {{Biological Psychiatry, Cellular and Molecular Neuroscience, Psychiatry and Mental health}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{PTBP2 – a gene with relevance for both Anorexia nervosa and body weight regulation}}}, doi = {{10.1038/s41398-022-02018-5}}, volume = {{12}}, year = {{2022}}, } @article{32328, abstract = {{Abstract Purpose The COVID-19 pandemic and public measures have a direct impact on the nutrition situation; studies show changes in food consumption, eating behavior or body weight but complex pattern analyses of changes rarely exist. Methods During the first German lockdown, a web-based survey was conducted among adults. It included 33 questions about changes in food intake, eating habits and physical activity, as well as anthropometrics and sociodemographic factors. Patterns of change were calculated based on changes in food intake and eating habits using two-step cluster analysis. To identify influencing factors for assignment to the patterns of change, binary logistic regression analyses were performed. Results Data from 2103 participants (81% female, 40 ± 14 years) were considered for analysis. Increased stockpiling, cooking, and variation in preparation was reported by 50–70%. The constant pattern (C-P, 36%) reported little change besides the above. The health-oriented pattern (HO-P; 37%) reported eating more healthy foods, avoiding unhealthy foods, and eating less and less frequently. The emotional-driven pattern (ED-P; 28%) exhibits higher influence of emotions on eating behavior, less avoidance of unhealthy foods, and increased consumption of sweets, pastries, and alcohol. The odds of changing eating behavior either to HO-P or ED-P were higher in women, people with migration background, younger participants, and increased with BMI categories. Conclusion Both, the ED-P and HO-P, exhibit distinctive reactions in eating habits and food intake when dealing with a distressing experience. In subgroups, these may lead to disturbances in eating behavior and increase the risk for eating disorders and obesity. }}, author = {{Bühlmeier, Judith and Frölich, Stefanie and Ludwig, Christine and Knoll-Pientka, Nadja and Schmidt, Börge and Föcker, Manuel and Libuda, Lars}}, issn = {{1436-6207}}, journal = {{European Journal of Nutrition}}, keywords = {{Nutrition and Dietetics, Medicine (miscellaneous)}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Changes in patterns of eating habits and food intake during the first German COVID-19 lockdown: results of a cross-sectional online survey}}}, doi = {{10.1007/s00394-022-02919-7}}, year = {{2022}}, } @article{33235, abstract = {{Abstract Purpose We aimed to investigate whether parental and siblings’ sugar-sweetened beverage (SSB) intake had prospective impact on children’s SSB consumption, and the potential sex difference in these associations. Methods This study included a total of 904 children and their parents enrolled from 2004 to 2011 China Health and Nutrition Survey (CHNS) cohort study. SSB consumption information was estimated using a short dietary questionnaire and total energy intake was assessed with three-day 24-h dietary assessments at recruitment and follow-up surveys. Multivariate logistic or linear regression analyses were used to assess the association for SSB consumption between parents, siblings and children after adjusting for age, body mass index (BMI) z-score, household income and parental educational level. Results In this study, a majority (87.6%) of children consumed SSB. Among them, the median consumption of SSB was 70.3 ml/day per capita and 205.4 ml/day per consumer. Parental SSB consumption was relevant to children’s SSB consumption, and this association was more pronounced in boys than in girls. Meanwhile, fathers seemed to have a stronger impact on whether children consume SSB than mothers which was reflected by lower P and higher OR. Additionally, children’s SSB intake was prospectively associated with their older siblings’ SSB consumption (Pfor trend < 0.03). Conclusions Parental and older siblings’ SSB consumption was relevant to children’s SSB intake. Particularly, boys were more susceptible to parental impact than girls, and fathers seemed to have a greater influence on children than mothers. }}, author = {{Liu, Xue-Ting and Xiong, Jing-Yuan and Xu, Yu-Jie and Zhao, Li and Libuda, Lars and Cheng, Guo}}, issn = {{1436-6207}}, journal = {{European Journal of Nutrition}}, keywords = {{Nutrition and Dietetics, Medicine (miscellaneous)}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Prospective association of family members’ sugar-sweetened beverages intake with children’s sugar-sweetened beverages consumption in China}}}, doi = {{10.1007/s00394-022-02971-3}}, year = {{2022}}, } @article{33234, author = {{Adan, Roger A.H. and Cirulli, Francesca and Dye, Louise and Higgs, Suzanne and Aarts, Kristien and van der Beek, Eline M. and Buitelaar, Jan K. and Destrebecq, Frédéric and De Witte, Elke and Hartmann, Tobias and Korosi, Aniko and Libuda, Lars and Dickson, Suzanne L.}}, issn = {{0889-1591}}, journal = {{Brain, Behavior, and Immunity}}, keywords = {{Behavioral Neuroscience, Endocrine and Autonomic Systems, Immunology}}, pages = {{201--203}}, publisher = {{Elsevier BV}}, title = {{{Towards new nutritional policies for brain health: A research perspective on future actions}}}, doi = {{10.1016/j.bbi.2022.07.012}}, volume = {{105}}, year = {{2022}}, } @article{33385, abstract = {{Abstract Background In Sub-Saharan African countries, rapid urbanization and increasing socio-economic status are associated with a transition to decreased physical activity (PA). A more sedentary lifestyle is linked to increased body fat leading to increments in leptin levels. Since rodent and human studies in high-income countries have shown that starvation-induced hypoleptinemia triggers high PA, efforts are warranted to pursue the hypothesis that low leptin levels in lean children of low- and middle-income countries (LMIC) are also associated with high PA. Methods In this cross-sectional study, we assessed seven-day PA with triaxial accelerometry (ActiGraph GT3X) among 223 primary school children (9 to 12 years of age) in rural Tanzania. Moderate-to-vigorous PA (MVPA) and total accelerometer counts per day were outcome variables. Leptin was determined using enzyme linked immunosorbent assay tests from dried blood spots. Anthropometric assessments were conducted and food insecurity and socio-demographic data were gathered using semi-structured interviews. Results In this sample of school children in rural Tanzania, leptin concentrations (median: 0.91 ng/mL, P25: 0.55, P75: 1.69), body mass index z-scores (median: -1.35, P25: -1.93, P75: -0.82), and height-for-age-z-scores (median: -1.16, P25: -1.96, P75: -0.61) were low. In contrast, PA levels were high with a median MVPA time of 119 min/day. Linear regression confirmed that leptin levels were negatively associated with MVPA (beta: -18.1; 95%CI: -29.7; -6.5; p = 0.002) and total accelerometer counts (beta: -90,256; 95%CI: -154,146; -26,365; p = 0.006). Children residing in areas with better infrastructure had lower MVPA levels (p < 0.001) and tended to have higher leptin levels (p = 0.062) than children residing in areas only reachable via dirt roads. Conclusion Our cross-sectional field study is the first that supports the hypothesis of low leptin levels as a potential endocrine trigger of high PA in lean children of a LMIC. We observed early signs of a PA transition towards a less active lifestyle in a subgroup residing in areas with better infrastructure that concomitantly tended to have higher leptin concentrations. Considering that area-dependent PA differences were more pronounced among girls than boys, whereas differences in leptin levels were less pronounced, not only biological, but also external factors explain PA transition. }}, author = {{Ludwig, Christine and Knoll-Pientka, Nadja and Mwanri, Akwilina and Erfle, Celina and Onywera, Vincent and Tremblay, Mark S. and Bühlmeier, Judith and Luzak, Agnes and Ferland, Maike and Schulz, Holger and Libuda, Lars and Hebebrand, Johannes}}, issn = {{1471-2458}}, journal = {{BMC Public Health}}, keywords = {{Public Health, Environmental and Occupational Health}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Low leptin levels are associated with elevated physical activity among lean school children in rural Tanzania}}}, doi = {{10.1186/s12889-022-12949-9}}, volume = {{22}}, year = {{2022}}, } @article{33386, abstract = {{Abstract Background/objectives The transition to adolescence is characterised by considerable behavioural changes, including diet. This study describes the level of obesogenic eating behaviours in 10- and 15-year-olds, and their association with dietary intake. Subjects/methods Participants of the 10- and 15-year follow-ups of the German GINIplus and LISA birth cohort studies were included (N10 = 2257; N15 = 1880). Eating behaviours and dietary intake were assessed via self-report questionnaires. Sex-stratified, cross-sectional associations of “external eating”, “emotional eating” and “dietary restraint” (the latter at age 15 years only) with dietary intake (17 food groups—categorised into tertiles, macronutrients, and total energy) were assessed using multinomial logistic or multiple linear regression as required, adjusting for covariates and correcting for multiple testing. Results Reported levels of eating behaviours were low in both age-groups. External eating was higher in 10-year-old males than females, while all eating behaviours were most pronounced in 15-year-old females. At 10 years, emotional eating was associated with medium vegetable intake in females (Relative Risk Ratio (RRR) = 1.84, p = 0.0017). At 15 years, external eating was associated with total energy (kJ) in females (β = 718, p = 0.0002) and high butter intake in males (RRR = 1.96, p = 0.0019). Dietary restraint in females was inversely associated with total energy (β = −967, p < 0.0001) and omega-3 fatty acids (Means Ratio (MR) = 0.94, p = 0.0017), and positively associated with high fruit (RRR = 2.20, p = 0.0003) and whole grains (RRR = 1.94, p = 0.0013). Conclusion Obesogenic eating behaviour scores are low among children and adolescents of a predominantly high socioeconomic status population and present only few associations with specific aspects of diet, mainly among adolescent females. }}, author = {{Marb, Anne and Libuda, Lars and Standl, Marie and Koletzko, Sibylle and Bauer, Carl-Peter and Schikowski, Tamara and Berdel, Dietrich and von Berg, Andrea and Herberth, Gunda and Bühlmeier, Judith and Harris, Carla P.}}, issn = {{0954-3007}}, journal = {{European Journal of Clinical Nutrition}}, keywords = {{Nutrition and Dietetics, Medicine (miscellaneous)}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Obesogenic eating behaviour and dietary intake in German children and adolescents: results from the GINIplus and LISA birth cohort studies}}}, doi = {{10.1038/s41430-022-01125-2}}, year = {{2022}}, } @inproceedings{30987, author = {{Kostitsyna, Irina and Scheideler, Christian and Warner, Daniel}}, booktitle = {{1st Symposium on Algorithmic Foundations of Dynamic Networks (SAND 2022)}}, editor = {{Aspnes, James and Michail, Othon}}, isbn = {{978-3-95977-224-2}}, issn = {{1868-8969}}, pages = {{23:1–23:3}}, publisher = {{Schloss Dagstuhl – Leibniz-Zentrum für Informatik}}, title = {{{Brief Announcement: Fault-Tolerant Shape Formation in the Amoebot Model}}}, doi = {{10.4230/LIPIcs.SAND.2022.23}}, volume = {{221}}, year = {{2022}}, } @inbook{33900, author = {{Famula, Marta}}, booktitle = {{Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000. (= Drama zwischen Text und Bühne 1)}}, editor = {{Famula, Marta and Witschel, Verena}}, pages = {{36–56}}, publisher = {{Brill | Fink}}, title = {{{Die Widerständigkeit der Wirklichkeit. Krise in Wolfram Lotzʼ Drama Der große Marsch}}}, year = {{2022}}, } @inbook{33901, author = {{Famula, Marta and Witschel, Verena}}, booktitle = {{Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000. (= Drama zwischen Text und Bühne 1)}}, editor = {{Famula, Marta and Witschel, Verena}}, pages = {{ IX–XX}}, publisher = {{Brill | Fink}}, title = {{{Einleitung}}}, year = {{2022}}, } @inproceedings{33914, abstract = {{Workshops on business model generation lead to collaborative work phases and discussions on business models. Therefore, tools such as the Business Model Canvas are used, typically filled with sticky notes. Generated content needs to be digitized in a time-consuming manual follow-up as part of the documentation and basis for a further use of the results in the company. In addition, there are challenges, such as decentralized work and digital workshop formats. Augmented Reality offers a way to reduce the digitization effort and enables decentralized work. In this research, the potentials of the use of AR technology in workshops on business model generation is investigated. Therefore, functions are implemented and evaluated in a demonstrator that reduces digitization effort and enable distributed work.}}, author = {{Gräßler, Iris and Grewe, Benedikt and Kramer, Hendrik}}, booktitle = {{LUT Scientific and Expertise Publications}}, keywords = {{business model generation, augmented reality, workshop, collaborative work, digitization, AR-supported workshop concept, immersive technologies, decentralized work, business model canvas}}, location = {{Copenhagen}}, title = {{{Supporting Business Model Generation with Augmented Reality}}}, year = {{2022}}, } @misc{6558, author = {{Friesen, Olga and Claes, Leander and Feldmann, Nadine and Henning, Bernd}}, title = {{{Estimation of piezoelectric material parameters of ring-shaped specimens}}}, year = {{2022}}, } @book{33943, editor = {{Famula, Marta and Özelt, Clemens and Schneider, Martin}}, publisher = {{Brill | Fink}}, title = {{{Die Kunst der Theatereröffnung. Ästhetik und Kulturpoetik von Vorreden und Vorspielen vom 17. Jahrhundert bis heute [in Vorbereitung] (Marta Famula ist Herausgeberin der Schriftenreihe "Drama zwischen Text und Bühne" zus. mit Agata Mirecka und Paul Martin Langner)}}}, volume = {{2}}, year = {{2022}}, } @inbook{33948, author = {{Rumlich, Dominik}}, booktitle = {{Cognition and second language acquisition}}, editor = {{Piske, Thorsten and Steinlen, Anja}}, pages = {{219--244}}, publisher = {{Narr Francke Attempto}}, title = {{{Exploring the importance of prior knowledge and verbal cognitive abilities for foreign language learning}}}, year = {{2022}}, } @article{25831, author = {{Meer, Philipp and Hartmann, Johanna and Rumlich, Dominik}}, journal = {{Applied Linguistics}}, number = {{3}}, pages = {{538--562}}, title = {{{Attitudes of German high school students toward different varieties of English}}}, doi = {{10.1093/applin/amab046}}, volume = {{43}}, year = {{2022}}, } @book{33944, editor = {{Famula, Marta and Witschel, Verena}}, publisher = {{Brill | Fink}}, title = {{{Theater und Krise. Paradigmen der Störung in Dramentexten und Bühnenkonzepten nach 2000 (Marta Famula ist Herausgeberin der Schriftenreihe "Drama zwischen Text und Bühne" zus. mit Agata Mirecka und Paul Martin Langner)}}}, volume = {{1}}, year = {{2022}}, } @article{33949, author = {{Rumlich, Dominik}}, journal = {{Fremdsprachen Lehren und Lernen}}, number = {{2}}, pages = {{121}}, title = {{{Weniger Kompetenz, mehr Resonanz. Contra Position}}}, volume = {{51}}, year = {{2022}}, } @article{33956, abstract = {{Abstract Smart Services eröffnen vielfältige Geschäftsmöglichkeiten für produzierende Unternehmen und erfordern zugleich einschneidende Anpassungen ihrer häufig historisch gewachsenen Wertschöpfung. Dieser Beitrag zeigt eine Web-Applikation, die es produzierenden Unternehmen erlaubt, die erforderliche Smart-Service-Transformation zu planen. Dafür werden umfassendes Lösungswissen bereitgestellt und eine individuelle Gestaltungsempfehlungen für die zukünftige Wertschöpfung als Smart-Service-Anbieter gegeben.}}, author = {{Reinhold, Jannik and Siewert, Michael and Scholtysik, Michel and Rasor, Anja and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2511-0896}}, journal = {{Zeitschrift für wirtschaftlichen Fabrikbetrieb}}, keywords = {{Management Science and Operations Research, Strategy and Management, General Engineering}}, number = {{5}}, pages = {{312--316}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Software-gestützte Planung der Smart-Service-Transformation}}}, doi = {{10.1515/zwf-2022-1048}}, volume = {{117}}, year = {{2022}}, } @article{33953, abstract = {{AbstractComprehensive data understanding is a key success driver for data analytics projects. Knowing the characteristics of the data helps a lot in selecting the appropriate data analysis techniques. Especially in data-driven product planning, knowledge about the data is a necessary prerequisite because data of the use phase is very heterogeneous. However, companies often do not have the necessary know-how or time to build up solid data understanding in connection with data analysis. In this paper, we develop a methodology to organize and categorize and thus understand use phase data in a way that makes it accessible to general data analytics workflows, following a design science research approach. We first present a knowledge base that lists typical use phase data from a product planning view. Second, we develop a taxonomy based on standard literature and real data objects, which covers the diversity of the data considered. The taxonomy provides 8 dimensions that support classification of use phase data and allows to capture data characteristics from a data analytics view. Finally, we combine both views by clustering the objects of the knowledge base according to the taxonomy. Each of the resulting clusters covers a typical combination of analytics relevant characteristics occurring in practice. By abstracting from the diversity of use phase data into artifacts with manageable complexity, our approach provides guidance to choose appropriate data analysis and AI techniques.}}, author = {{Panzner, Melina and von Enzberg, Sebastian and Meyer, Maurice and Dumitrescu, Roman}}, issn = {{1868-7865}}, journal = {{Journal of the Knowledge Economy}}, keywords = {{Economics and Econometrics}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Characterization of Usage Data with the Help of Data Classifications}}}, doi = {{10.1007/s13132-022-01081-z}}, year = {{2022}}, } @inproceedings{33706, author = {{Panzner, Melina and Meyer, Maurice and Enzberg, Sebastian von and Dumitrescu, Roman}}, booktitle = {{Procedia CIRP}}, issn = {{2212-8271}}, keywords = {{General Medicine}}, pages = {{580--585}}, publisher = {{Elsevier BV}}, title = {{{Business-to-Analytics Canvas - Translation of Product Planning-Related Business Use Cases into Concrete Data Analytics Tasks}}}, doi = {{10.1016/j.procir.2022.05.298}}, volume = {{109}}, year = {{2022}}, } @inproceedings{33954, author = {{Boeddeker, Christoph and Cord-Landwehr, Tobias and von Neumann, Thilo and Haeb-Umbach, Reinhold}}, booktitle = {{Interspeech 2022}}, publisher = {{ISCA}}, title = {{{An Initialization Scheme for Meeting Separation with Spatial Mixture Models}}}, doi = {{10.21437/interspeech.2022-10929}}, year = {{2022}}, } @article{33955, author = {{Reinhold, Jannik and Koldewey, Christian and Dumitrescu, Roman}}, issn = {{2212-8271}}, journal = {{Procedia CIRP}}, keywords = {{General Medicine}}, pages = {{413--418}}, publisher = {{Elsevier BV}}, title = {{{Value Creation Framework and Roles for Smart Services}}}, doi = {{10.1016/j.procir.2022.05.271}}, volume = {{109}}, year = {{2022}}, } @misc{33959, abstract = {{Recent studies have revealed that 87 % to 96 % of the Android apps using cryptographic APIs have a misuse which may cause security vulnerabilities. As previous studies did not conduct a qualitative examination of the validity and severity of the findings, our objective was to understand the findings in more depth. We analyzed a set of 936 open-source Java applications for cryptographic misuses. Our study reveals that 88.10 % of the analyzed applications fail to use cryptographic APIs securely. Through our manual analysis of a random sample, we gained new insights into effective false positives. For example, every fourth misuse of the frequently misused JCA class MessageDigest is an effective false positive due to its occurrence in a non-security context. As we wanted to gain deeper insights into the security implications of these misuses, we created an extensive vulnerability model for cryptographic API misuses. Our model includes previously undiscussed attacks in the context of cryptographic APIs such as DoS attacks. This model reveals that nearly half of the misuses are of high severity, e.g., hard-coded credentials and potential Man-in-the-Middle attacks.}}, author = {{Wickert, Anna-Katharina and Baumgärtner, Lars and Schlichtig, Michael and Mezini, Mira}}, title = {{{To Fix or Not to Fix: A Critical Study of Crypto-misuses in the Wild}}}, doi = {{10.48550/ARXIV.2209.11103}}, year = {{2022}}, } @article{33960, author = {{Scharlau, Ingrid and Schreiber, Christine}}, journal = {{Psychologieunterricht}}, number = {{55}}, pages = {{31--35}}, publisher = {{Verband der Psychologielehrerinnen und - lehrer}}, title = {{{Facharbeiten schreiben - Informationen für Schülerinnen und Schüler}}}, year = {{2022}}, } @inproceedings{33967, author = {{Aguiliera, Marcos and Richa, Andréa W. and Schwarzmann, Alexander A. and Panconesi, Alessandro and Scheideler, Christian and Woelfel, Philipp}}, booktitle = {{PODC ’22: ACM Symposium on Principles of Distributed Computing, Salerno, Italy, July 25 - 29, 2022}}, editor = {{Milani, Alessia and Woelfel, Philipp}}, pages = {{1}}, publisher = {{ACM}}, title = {{{2022 Edsger W. Dijkstra Prize in Distributed Computing}}}, doi = {{10.1145/3519270.3538411}}, year = {{2022}}, } @inproceedings{33972, author = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Inguva, Venkatesh and Kenig, Eugeny Y.}}, booktitle = {{1st Conference on Energy, Environment and Digital Transition E2DT}}, location = {{Mailand, Italien}}, title = {{{A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids}}}, year = {{2022}}, } @proceedings{33968, editor = {{Scheideler, Christian}}, isbn = {{978-3-95977-255-6}}, publisher = {{Schloss Dagstuhl - Leibniz-Zentrum für Informatik}}, title = {{{36th International Symposium on Distributed Computing, DISC 2022, October 25-27, 2022, Augusta, Georgia, USA}}}, volume = {{246}}, year = {{2022}}, } @article{33988, author = {{Moritzer, Elmar and Driediger, Christine}}, issn = {{1022-1360}}, journal = {{Macromolecular Symposia}}, keywords = {{digital light processing, material combination, reactive direct bonding, vat photopolymerization}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Reactive Direct Bonding of Digital Light Process Components}}}, doi = {{10.1002/masy.202100396}}, volume = {{404}}, year = {{2022}}, } @misc{33987, author = {{Moritzer, Elmar and Elsner, Christian Lennart}}, booktitle = {{Kunststoffe}}, issn = {{0023–5563}}, title = {{{Mit Gestaltungsrichtlinien zum Erfolg}}}, volume = {{11/2022}}, year = {{2022}}, } @inproceedings{33997, abstract = {{Digital platforms have already led to disruptions in multiple B2C markets and are becoming increasingly dominant in B2B markets. As a result, more and more companies are trying to participate in the platform economy. However, the successful development and operation of a digital platform is associated with significant challenges, which leads to 85% of all platforms failing. A core challenge is the dynamic nature of the platform economy, with varying strategic objectives at different stages in the platform lifecycle. Platform operators must continuously monitor platform progress and adjust their strategy. Utilizing action research in the real-world platform project AI Marketplace, we developed a lifecycle-oriented performance management approach for digital platforms in B2B markets. It enables platform operators to reflect on their position in the platform lifecycle, derive relevant strategic objectives, and monitor them with suitable key performance indicators. Hence, allowing them to secure the long-term success of their platform business.}}, author = {{Özcan, Leon and Kirchberg, Lisa and Koldewey, Christian and Dumitrescu, Roman}}, booktitle = {{The Role of Innovation: Past, Present, Future}}, editor = {{Bitran, Iain and Bitetti, Leandro and Conn, Steffen and Fishburn, Jessica and Huizingh, Eelko and Torkkeli, Marko and Yang, Jialei}}, keywords = {{Digital Platform, Two-Sided Market, Multi-Sided Market, Platform Lifecycle, Platform Monitoring, Performance Management}}, location = {{Athens}}, title = {{{Performance Management Approach for Digital Platforms in B2B Markets}}}, year = {{2022}}, } @inproceedings{33991, abstract = {{In the course of digitalization, digital platforms are unleashing their full disruptive potential and are already dominating the first industries (e.g., hotel industry). As a result of this success, more and more companies want to build their own platforms and participate in the success. However, building and operating a digital platform involves multiple challenges and most of such ambitions fail. Since most digital platforms fail, strategic leadership of digital platforms must consider both success factors and reasons for platform failure. For this purpose, we conducted a systematic literature analysis and identified 24 success as well as failure factors in 9 dimensions. From a scientific perspective, the article provides a structured analysis of success and failure factors of digital platforms, which previously did not exist in literature. Practitioners can use the resulting knowledge base to successfully manage platform activities and avoid pitfalls.}}, author = {{Özcan, Leon and Koldewey, Christian and Duparc, Estelle and van der Valk, Hendrik and Otto, Boris and Dumitrescu, Roman}}, keywords = {{Digital Platform, Multi-sided Market, Two-sided Market, Success Factor, Failure Factor}}, location = {{Minneapolis}}, title = {{{Why do Digital Platforms succeed or fail? - A Literature Review on Success and Failure Factors}}}, year = {{2022}}, } @inproceedings{34007, author = {{Lienen, Christian and Platzner, Marco}}, location = {{Neaples, Italy}}, title = {{{Task Mapping for Hardware-Accelerated Robotics Applications using ReconROS}}}, year = {{2022}}, } @inbook{34015, author = {{Scharlau, Ingrid}}, booktitle = {{Reflexive Schreibwissenschaft}}, editor = {{Haacke-Werron, Stefanie and Karsten, Andrea and Scharlau, Ingrid}}, pages = {{147--152}}, publisher = {{WBV}}, title = {{{Hundertstelmillimeter}}}, doi = {{10.3278/9783763972524}}, volume = {{14}}, year = {{2022}}, } @book{34013, editor = {{Haacke-Werron, Stefanie and Karsten, Andrea and Scharlau, Ingrid}}, pages = {{184}}, publisher = {{WBV}}, title = {{{Reflexive Schreibwissenschaft}}}, doi = {{ 10.3278/9783763972524}}, volume = {{14}}, year = {{2022}}, } @article{34253, abstract = {{Lightweight construction has increasingly become the focus of scientific research in recent years, not least due to the constantly increasing fuel price, which is a key factor in the economic viability of many companies. In this respect, the use of hybrid structures, made of dissimilar materials offers many advantages. However, such hybrid structures often have undesirable side effects. For example, brittle intermetallic phases are formed when aluminum and steel are welded. Clinching as a mechanical joining process does not produce such intermetallic phases since the connection is realized through form and force closure. In this process, a punch passes through two or more sheets and forms them into a permanent joint in a die. In the present work, the corrosion phenomena of an aluminum-steel clinched joint have been investigated by both experiments and numerical simulations in order to explain the superior fatigue behavior of pre-corroded joints. Therefore, the clinched joints have been corroded by a three-week salt-spray test. In addition, the electric potential and the von Mises stress are calculated under the assumption of a static loading. The results of both experiments and numerical simulations can explain the improvement in the fatigue behavior of the corroded specimens. This phenomenon can be attributed to the accumulation of corrosion products in small gaps between the joined metal sheets.}}, author = {{Harzheim, Sven and Ewenz, Lars and Zimmermann, Martina and Wallmersperger, Thomas}}, issn = {{2666-3309}}, journal = {{Journal of Advanced Joining Processes}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}}, publisher = {{Elsevier BV}}, title = {{{Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental Investigations}}}, doi = {{10.1016/j.jajp.2022.100130}}, volume = {{6}}, year = {{2022}}, } @article{34252, abstract = {{Clinching is the manufacturing process of joining two or more metal sheets under high plastic deformation by form and force closure without thermal support and auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid material combinations, such as steel and aluminum. Therefore, this technology is interesting for the application of AISI 304 components, as this material is widely used as a highly formable sheet material. A characteristic feature of AISI 304 is its metastability, i.e., the face-centered cubic (fcc) γ-austenite can transform into a significantly stronger body-centered cubic (bcc) α’-martensite under plastic deformation. This work investigates the effect of heat treatment—a process that involves the formation of an oxidation layer on the sheet surface—on the forming process during joining and the resulting mechanical properties of clinch joints made from AISI 304. For this purpose, different joints made from non-heat treated and heat-treated sheets were examined using classical metallography and advanced SEM techniques, accompanied by further investigations, such as hardness and feritscope measurements. The shear tensile strength was determined, and the fracture behavior of the samples was investigated. Clear influences of heat-treatment-induced surface roughness on the joint geometry and strength were observed.}}, author = {{Zeuner, André Till and Ewenz, Lars and Kalich, Jan and Schöne, Sebastian and Füssel, Uwe and Zimmermann, Martina}}, issn = {{2075-4701}}, journal = {{Metals}}, keywords = {{General Materials Science, Metals and Alloys}}, number = {{9}}, publisher = {{MDPI AG}}, title = {{{The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints}}}, doi = {{10.3390/met12091514}}, volume = {{12}}, year = {{2022}}, } @article{34249, abstract = {{The trend towards lightweight design, driven by increasingly stringent emission targets, poses challenges to conventional joining processes due to the different mechanical properties of the joining partners used to manufacture multi-material systems. For this reason, new versatile joining processes are in demand for joining dissimilar materials. In this regard, pin joining with cold extruded pin structures is a relatively new, two-stage joining process for joining materials such as high-strength steel and aluminium as well as steel and fibre-reinforced plastic to multi-material systems, without the need for auxiliary elements. Due to the novelty of the process, there are currently only a few studies on the robustness of this joining process available. Thus, limited statements on the stability of the joining process considering uncertain process conditions, such as varying material properties or friction values, can be provided. Motivated by this, the presented work investigates the influence of different uncertain process parameters on the pin extrusion as well as on the joining process itself, carrying out a systematic robustness analysis. Therefore, the methodical approach covers the complete process chain of pin joining, including the load-bearing capacity of the joint by means of numerical simulation and data-driven methods. Thereby, a deeper understanding of the pin joining process is generated and the versatility of the novel joining process is increased. Additionally, the provision of manufacturing recommendations for the forming of pin joints leads to a significant decrease in the failure probability caused by ploughing or buckling effects.}}, author = {{Römisch, David and Zirngibl, Christoph and Schleich, Benjamin and Wartzack, Sandro and Merklein, Marion}}, issn = {{2504-4494}}, journal = {{Journal of Manufacturing and Materials Processing}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}}, number = {{5}}, publisher = {{MDPI AG}}, title = {{{Robustness Analysis of Pin Joining}}}, doi = {{10.3390/jmmp6050122}}, volume = {{6}}, year = {{2022}}, } @article{34255, abstract = {{Deformation of continuous fibre reinforced plastics during thermally-assisted forming or joining processes leads to a change of the initial material structure. The load behaviour of composite parts strongly depends on the resultant material structure. The prediction of this material structure is a challenging task and requires a deep knowledge of the material behaviour above melting temperature and the occurring complex forming phenomena. Through this knowledge, the optimisation of manufacturing parameters for a more efficient and reproducible process can be enabled and are in the focus of many investigations. In the present paper, a simplified pultrusion test rig is developed and presented to investigate the deformation behaviour of a thermoplastic semi-finished fiber product in a forming element. Therefore, different process parameters, like forming element temperature, pulling velocity as well as the forming element geometry, are varied. The deformation behaviour in the forming zone of the thermoplastic preimpregnated continuous glass fibre-reinforced material is investigated by computed tomography and the resultant pulling forces are measured. The results clearly show the correlation between the forming element temperature and the resulting forces due to a change in the viscosity of the thermoplastic matrix and the resulting fiber matrix interaction. In addition, the evaluation of the measurement data shows which forming forces are required to change the shape of the thermoplastic unidirectional material with a rectangular cross-section to a round one.}}, author = {{Borowski, Andreas and Gröger, Benjamin and Füßel, René and Gude, Maik}}, issn = {{2504-4494}}, journal = {{Journal of Manufacturing and Materials Processing}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}}, number = {{6}}, publisher = {{MDPI AG}}, title = {{{Characterisation of Fibre Bundle Deformation Behaviour—Test Rig, Results and Conclusions}}}, doi = {{10.3390/jmmp6060146}}, volume = {{6}}, year = {{2022}}, } @article{34248, abstract = {{Pin extrusion is a common process to realise pin structures in different geometrical dimensions for a subsequent joining operation. Nevertheless, the process of pin extrusion offers process limits regarding sheet thinning as a consequence of the punch penetration depth into the sheet. Thereby, cracks at the residual sheet thickness can occur during strength tests, resulting in a failure of the complete joint due to severe thinning. Therefore, measures have to be taken into account to reduce the thinning. One possibility is the application of orbital formed tailored blanks with a local material pre-distribution, which allows a higher sheet thickness in the desired area. Within this contribution, the novel approach of a process combination of orbital forming and pin extrusion is investigated. To reveal the potential of a local material pre-distribution, conventional specimens are compared with previously orbital formed components. Relevant parameters such as the residual sheet thickness, the pin height as well as the average hardness values are compared. The results show a significant positive influence of a local material pre-distribution on the residual sheet thickness as well as the resulting pin height. Furthermore, the strain hardening during orbital forming can be seen as an additional advantage. To conclude the results, the process limits of conventional pin extrusion can be expanded significantly by the application of specimens with a local material pre-distribution.}}, author = {{Römisch, David and Hetzel, Andreas and Wituschek, Simon and Lechner, Michael and Merklein, Marion}}, issn = {{2504-4494}}, journal = {{Journal of Manufacturing and Materials Processing}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}}, number = {{6}}, publisher = {{MDPI AG}}, title = {{{Pin Extrusion for Mechanical Joining from Orbital Formed Tailored Blanks with Local Material Pre-Distribution}}}, doi = {{10.3390/jmmp6060127}}, volume = {{6}}, year = {{2022}}, } @article{34247, abstract = {{The paper presents research regarding a thermally supported multi-material clinching process (hotclinching) for metal and thermoplastic composite (TPC) sheets: an experimental approach to investigate the flow pressing phenomena during joining. Therefore, an experimental setup is developed to compress the TPC-specimens in out-of-plane direction with different initial TPC thicknesses and varying temperature levels. The deformed specimens are analyzed with computed tomography to investigate the resultant inner material structure at different compaction levels. The results are compared in terms of force-compaction-curves and occurring phenomena during compaction. The change of the material structure is characterized by sliding phenomena and crack initiation and growth.}}, author = {{Gröger, Benjamin and Römisch, David and Kraus, Martin and Troschitz, Juliane and Füßel, René and Merklein, Marion and Gude, Maik}}, issn = {{2073-4360}}, journal = {{Polymers}}, keywords = {{Polymers and Plastics, General Chemistry}}, number = {{22}}, publisher = {{MDPI AG}}, title = {{{Warmforming Flow Pressing Characteristics of Continuous Fibre Reinforced Thermoplastic Composites}}}, doi = {{10.3390/polym14225039}}, volume = {{14}}, year = {{2022}}, } @article{34256, abstract = {{The 3D shear deformation and failure behaviour of a glass fibre reinforced polypropylene in a shear strain rate range of γ˙=2.2×10−4 to 3.4 1s is investigated. An Iosipescu testing setup on a servo-hydraulic high speed testing unit is used to experimentally characterise the in-plane and out-of-plane behaviour utilising three specimen configurations (12-, 13- and 31-direction). The experimental procedure as well as the testing results are presented and discussed. The measured shear stress–shear strain relations indicate a highly nonlinear behaviour and a distinct rate dependency. Two methods are investigated to derive according material characteristics: a classical engineering approach based on moduli and strengths and a data driven approach based on the curve progression. In all cases a Johnson–Cook based formulation is used to describe rate dependency. The analysis methodologies as well as the derived model parameters are described and discussed in detail. It is shown that a phenomenologically enhanced regression can be used to obtain material characteristics for a generalising constitutive model based on the data driven approach.}}, author = {{Gerritzen, Johannes and Hornig, Andreas and Gröger, Benjamin and Gude, Maik}}, issn = {{2504-477X}}, journal = {{Journal of Composites Science}}, keywords = {{Engineering (miscellaneous), Ceramics and Composites}}, number = {{10}}, publisher = {{MDPI AG}}, title = {{{A Data Driven Modelling Approach for the Strain Rate Dependent 3D Shear Deformation and Failure of Thermoplastic Fibre Reinforced Composites: Experimental Characterisation and Deriving Modelling Parameters}}}, doi = {{10.3390/jcs6100318}}, volume = {{6}}, year = {{2022}}, } @article{34214, abstract = {{This article presents the application and evaluation of a cantilever with integrated sensing and actuation as part of an atomic force microscope (AFM) with an adjustable probe direction, which is integrated into a nano measuring machine (NMM-1). The AFM, which is operated in closed-loop intermittent contact mode, is based on two rotational axes that enable the adjustment of the probe direction to cover a complete hemisphere. The axes greatly enlarge the metrology frame of the measuring system by materials with a comparatively high coefficient of thermal expansion, which ultimately limits the achievable measurement uncertainty of the measuring system. Thus, to reduce the thermal sensitivity of the system, the redesign of the rotational kinematics is mandatory. However, in this article, some preliminary investigations on the application of a self-sensing cantilever with an integrated micro heater for its stimulation will be presented. In previous investigations, a piezoelectric actuator has been applied to stimulate the cantilever. However, the removal of the piezoelectric actuator, which is enabled by the application of a cantilever with an integrated micro heater, promises an essential simplification of the sensor holder. Thus, in the future it might be possible to use materials with a low coefficient of thermal expansion, which are often difficult to machine and therefore only allow for rather simple geometries. Furthermore, because of the creepage of piezoelectric actuators, their removal from the metrology frame might lead to improved metrological characteristics. As will be shown, there are no significant differences between the two modes of actuation. Therefore, the redesigned rotational system will be based on the cantilever with integrated sensing and actuation.}}, author = {{Schaude, Janik and Hausotte, Tino}}, issn = {{2520-811X}}, journal = {{Nanomanufacturing and Metrology}}, keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Materials Science (miscellaneous)}}, number = {{2}}, pages = {{139--148}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Atomic Force Microscope with an Adjustable Probe Direction and Integrated Sensing and Actuation}}}, doi = {{10.1007/s41871-022-00143-9}}, volume = {{5}}, year = {{2022}}, } @inbook{34209, abstract = {{Predicting the durability of components subjected to mechanical load under environmental conditions leading to corrosion is one of the most challenging tasks in mechanical engineering. The demand for precise predictions increases with the desire of lightweight design in transportation due to environmental protection. Corrosion with its manifold of mechanisms often occurs together with the production of hydrogen by electrochemical reactions. Hydrogen embrittlement is one of the most feared damage mechanisms for metal constructions often leading to early and unexpected failure. Until now, predictions are mostly based on costly experiments. Hence, a rational predictive model based on the fundamentals of electrochemistry and damage mechanics has to be developed in order to reduce the costs. In this work, a first model approach based on classical continuum damage mechanics is presented to couple both, the damage induced by the mechanical stress and the hydrogen embrittlement. An elaborated two-scale model based on the selfconsistent theory is applied to describe the mechanical damage due to fatigue. The electrochemical kinetics are elucidated through the Langmuir adsorption isotherm and the diffusion equation to consider the impact of hydrogen embrittlement on the fatigue. The modeling of the mechanism of hydrogen embrittlement defines the progress of damage accumulation due to the electrochemistry. The durability results like the S-N diagram show the influence of hydrogen embrittlement by varying, e.g. the fatigue frequency or the stress ratio.}}, author = {{Shi, Yuhao and Harzheim, Sven and Hofmann, Martin and Wallmersperger, Thomas}}, booktitle = {{Material Modeling and Structural Mechanics}}, isbn = {{9783030976743}}, issn = {{1869-8433}}, keywords = {{Hydrogen embrittlement, Fatigue, Continuum damage mechanics, Numerical simulation, Multi-field problem}}, publisher = {{Springer International Publishing}}, title = {{{A Damage Model for Corrosion Fatigue Due to Hydrogen Embrittlement}}}, doi = {{10.1007/978-3-030-97675-0_9}}, year = {{2022}}, } @article{34251, abstract = {{Joining by forming operations presents powerful and complex joining techniques. Clinching is a well-known joining process for use in sheet metalworking. Currently, clinched joints are focusing on mechanically enhanced connections. Additionally, the demand for integrating electrical requirements to transmit electrical currents will be increased in the future. This integration is particularly important, for instance, in the e-mobility sector. It enables connecting battery cells with electrical joints of aluminum and copper. Systematic use of the process-specific advantages of this joining method opens up the possibility to find and create electrically optimized connections. The optimization for the transmission of electrical currents will be demonstrated for clinched joints by adapting the tool geometry and the clinched joint design. Based on a comparison of the electrical joint resistance, the limit use temperature is defined for the joining materials used based on the microstructural condition and the aging condition due to artificial aging. As a result of the investigations carried out, reliable current transmission at a constant conductor temperature of up to 120 °C can be achieved for clinched copper–copper joints. In the case of pure aluminum joints and mixed joints of aluminum and copper, long-term stable current transmission can be ensured up to a conductor temperature of 100 °C.}}, author = {{Kalich, Jan and Matzke, Marcus and Pfeiffer, Wolfgang and Schlegel, Stephan and Kornhuber, Ludwig and Füssel, Uwe}}, issn = {{2075-4701}}, journal = {{Metals}}, keywords = {{General Materials Science, Metals and Alloys}}, number = {{10}}, publisher = {{MDPI AG}}, title = {{{Long-Term Behavior of Clinched Electrical Contacts}}}, doi = {{10.3390/met12101651}}, volume = {{12}}, year = {{2022}}, } @article{34254, abstract = {{A virtual test setup for investigating single fibres in a transverse shear flow based on a parallel-plate rheometer is presented. The investigations are carried out to verify a numerical representation of the fluid–structure interaction (FSI), where Arbitrary Lagrangian–Eulerian (ALE) and computational fluid dynamics (CFD) methods are used and evaluated. Both are suitable to simulate flexible solid structures in a transverse shear flow. Comparative investigations with different model setups and increasing complexity are presented. It is shown, that the CFD method with an interface-based coupling approach is not capable of handling small fibre diameters in comparison to large fluid domains due to mesh dependencies at the interface definitions. The ALE method is more suited for this task since fibres are embedded without any mesh restrictions. Element types beam, solid, and discrete are considered for fibre modelling. It is shown that the beam formulation for ALE and 3D solid elements for the CFD method are the preferred options.}}, author = {{Gröger, Benjamin and Wang, Jingjing and Bätzel, Tim and Hornig, Andreas and Gude, Maik}}, issn = {{1996-1944}}, journal = {{Materials}}, keywords = {{General Materials Science}}, number = {{20}}, publisher = {{MDPI AG}}, title = {{{Modelling and Simulation Strategies for Fluid–Structure-Interactions of Highly Viscous Thermoplastic Melt and Single Fibres—A Numerical Study}}}, doi = {{10.3390/ma15207241}}, volume = {{15}}, year = {{2022}}, }