@inproceedings{61763, abstract = {{Abstract. Within the punch-bending process semi-finished products of strip or wire material are formed and punched in several subsequent steps into a finished product like brackets, mounts, contacts or spring elements. In the context of those multi-stage straightening and bending processes, cross-stage and quantity-dependent effects significantly leads to undesired component deviations. To optimize the punch-bending process with regard to these component deviations and thus the waste rate, the concept of a hybrid data-driven model is presented. To automatically acquire and process this hybrid data while also enable the usage by multiple clients, a digital twin has to be developed. In this paper the communication infrastructure between the punch-bending system and the digital twin is presented, using the Asset Administration Shell as specification. This automated communication is validated using exemplary data from the punch-bending system.}}, author = {{Peters, Henning and Mazur, Andreas and Trächtler, Ansgar and Hammer, Barbara}}, booktitle = {{Materials Research Proceedings}}, issn = {{2474-395X}}, publisher = {{Materials Research Forum LLC}}, title = {{{Integration of a digital twin for data-driven modeling of punch-bending processes using the asset administration shell}}}, doi = {{10.21741/9781644903599-166}}, volume = {{54}}, year = {{2025}}, } @article{61761, abstract = {{Abstract Data-driven methods are increasingly utilized in metal forming processes for monitoring and quality optimization. An adapted modeling notation DSL4DPiFS for forming processes is presented to model hardware, software, and data flow aspects to support the design and analysis of data-driven methods. DSL4DPiFS enables metal forming and automation experts to model field-level information as data sources, and the data sinks for data analysis. The notation was adapted to the requirements of selected metal forming processes and evaluated in three case studies.}}, author = {{Vogel-Heuser, Birgit and Zhang, Mingxi and Krüger, Marius and Vicaria, Alejandra and Gardill, Markus and Jiang, Yuyao and Trächtler, Ansgar and Peters, Henning and Liewald, Mathias and Schenek, Adrian and Heinzelmann, Pascal and Weyrich, Michael}}, issn = {{0178-2312}}, journal = {{at - Automatisierungstechnik}}, number = {{4}}, pages = {{232--250}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{DSL4DPiFS – a graphical notation to model data pipeline deployment in forming systems}}}, doi = {{10.1515/auto-2024-0114}}, volume = {{73}}, year = {{2025}}, } @inbook{61765, author = {{Mazur, Andreas and Peters, Henning and Artelt, André and Koller, Lukas and Hartmann, Christoph and Trächtler, Ansgar and Hammer, Barbara}}, booktitle = {{Lecture Notes in Computer Science}}, isbn = {{9783032045546}}, issn = {{0302-9743}}, publisher = {{Springer Nature Switzerland}}, title = {{{Studying the Generalization Behavior of Surrogate Models for Punch-Bending by Generating Plausible Counterfactuals}}}, doi = {{10.1007/978-3-032-04555-3_16}}, year = {{2025}}, } @inproceedings{59907, abstract = {{Abstract. Flow forming is recognized for its precision in producing rotationally symmetric components, but the use of metastable austenitic stainless steel (AISI 304L) introduces challenges due to uncontrolled strain-induced α’ martensite formation. Variations in factors such as eccentricity and batch inconsistencies lead to unpredictable microstructural profiles, limiting reproducibility [1,2]. This study addresses these issues by incorporating thermal actuators for cryogenic cooling and induction heating to regulate forming temperatures, enabling control of the α’-martensite content. Experimental investigations demonstrate that local tempering during thermomechanical reverse flow forming produces discernible variations in microstructure, affecting mechanical and magnetic properties [3]. Controlled local adjustments of α’-martensite content allow for customization of properties in seamless tubes, advancing manufacturing capabilities for complex, defect-free components. The results presented demonstrate promising strategies for implementation within the context of closed-loop property control in flow forming.}}, author = {{Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}}, booktitle = {{Materials Research Proceedings}}, editor = {{Carlone, Pierpaolo and Filice, Luigino and Umbrello, Domenico}}, issn = {{2474-395X}}, keywords = {{Flow Forming, Thermomechanical Forming, α’-Martensite, Property Control}}, location = {{Paestum, Italy}}, publisher = {{Materials Research Forum LLC}}, title = {{{Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties}}}, doi = {{10.21741/9781644903599-127}}, volume = {{54}}, year = {{2025}}, } @article{62024, abstract = {{Abstract This paper presents a characterization of the microstructural evolution and its correlation with the magnetic structure due to flow forming of semi-finished tubes of austenitic stainless steel AISI 304L. The plastic deformation triggers a phase transformation of the metastable austenite into α’-martensite. Depending on the combination of production parameters, different fractions of strain-induced α’-martensite were measured by means non-destructive micromagnetic techniques and correlated with the evolution of hardness and the microstructure using electron backscatter diffraction analyses. The magneto-optical Kerr effect analysis was used as a tool to perform a qualitative analysis of the evolution of the magnetic domain structure correlated with the formation of α’-martensite. An analysis of these data allowed to derive surface magnetization hysteresis loops that were compared with integral hysteresis loops of the specimens. It was proven by both methods that the formation of martensite increases the magnetic energy and the spontaneous magnetization of the specimens. The results of this investigation contribute to a better understanding of micromagnetic sensors to monitor and control the formation of α’-martensite in a flow forming. Furthermore, various techniques have demonstrated the evolution of the magnetic properties of the material, which can be applied in applications for invisible coding of workpieces.}}, author = {{Rozo Vasquez, Julian and Tappe, Jan and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}}, issn = {{2195-8599}}, journal = {{Practical Metallography}}, number = {{9-10}}, pages = {{617--633}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L}}}, doi = {{10.1515/pm-2025-0059}}, volume = {{62}}, year = {{2025}}, } @inproceedings{62022, abstract = {{Abstract. The incremental flow forming process features a large number of process parameter combinations that can be varied from pass to pass or during a pass. In the future however, a more efficient utilization of this large number of process parameter combinations and a compensation of process disturbances could be required. This is due to a rising demand for increasing the part complexity, e.g. by graded property structures or a more complex geometry. In this context, innovative approaches like closed-loop property control and optimal control are advantageous, but require fast process models of flow forming that are not state of the art. This paper thus proposes a new modelling approach of multi-pass flow forming especially taking the transfer behavior between process parameters and wall thickness evolution from pass to pass into focus. A hybrid modelling approach is developed that combines knowledge about the incremental process character with empirical data regression to a basic analytic relation. The basic relation is further extended by a multi-layer neural network to enhance the overall model accuracy. This hybrid modelling approach is finally validated using experimental data. Thus, it is shown that a suitable model structure was found in context of a future closed-loop control or optimal control for multi-pass flow forming.}}, author = {{Kersting, Lukas and Gunasagran, Sharin Kumar and Arian, Bahman and Rozo Vaszquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}}, booktitle = {{Materials Research Proceedings}}, issn = {{2474-395X}}, publisher = {{Materials Research Forum LLC}}, title = {{{Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model}}}, doi = {{10.21741/9781644903599-140}}, volume = {{54}}, year = {{2025}}, } @article{62023, abstract = {{Zusammenfassung Die Eigenschaftsregelung mit einer online-Messung der Bauteileigenschaften ist ein in der Umformtechnik viel diskutiertes, aber kaum validiertes Konzept, um den Automatisierungsgrad bei der Bauteilfertigung weiter zu erhöhen. Dieser Artikel soll helfen, die Lücke beispielhaft für den Fertigungsprozess des Drückwalzens metastabiler Austenite zu schließen. Der metastabile austenitische Edelstahl ändert hierbei während der Verformung seinen α′-Martensitgehalt und damit verbunden die magnetischen Eigenschaften. Deshalb soll über die Regelung das definierte Einstellen des α′-Martensitgehaltes möglich werden. Im Rahmen des vorliegenden Artikels wird gezeigt, wie mittels des modellbasierten Entwurfs die Eigenschaftsregelung ausgelegt und parametriert werden kann. Zudem beinhaltet der Artikel experimentelle Validierungsergebnisse der zuvor entworfenen Eigenschaftsregelung.}}, author = {{Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}}, issn = {{0178-2312}}, journal = {{at - Automatisierungstechnik}}, number = {{7}}, pages = {{527--540}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite}}}, doi = {{10.1515/auto-2024-0127}}, volume = {{73}}, year = {{2025}}, } @article{62021, author = {{Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}}, issn = {{2405-8963}}, journal = {{IFAC-PapersOnLine}}, number = {{1}}, pages = {{109--114}}, publisher = {{Elsevier BV}}, title = {{{State-space modelling approach for control and observer design in property-controlled reverse flow forming}}}, doi = {{10.1016/j.ifacol.2025.03.020}}, volume = {{59}}, year = {{2025}}, } @unpublished{61999, author = {{Münzmay, Andreas}}, pages = {{24}}, title = {{{Beethovens Eigenbearbeitungen und digitale Heuristik. Erkundungen mit den synoptischen Doppeleditionen und Analysewerkzeugen des Projekts Beethovens Werkstatt}}}, year = {{2025}}, } @article{62045, author = {{Naumann, Marius and Henne, Kevin and Ostermann, Moritz and Schlosser, Florian and Meschede, Henning}}, journal = {{Procedia CIRP}}, location = {{Manchester}}, pages = {{1351--1358}}, publisher = {{Elsevier}}, title = {{{Modular Energy Demand Modeling of Manufacturing Processes for Energy Efficiency Improvement}}}, doi = {{doi.org/10.1016/j.procir.2025.08.001}}, volume = {{135}}, year = {{2025}}, } @article{62064, abstract = {{SYCL is an open standard for targeting heterogeneous hardware from C++. In this work, we evaluate a SYCL implementation for a discontinuous Galerkin discretization of the 2D shallow water equations targeting CPUs, GPUs, and also FPGAs. The discretization uses polynomial orders zero to two on unstructured triangular meshes. Separating memory accesses from the numerical code allow us to optimize data accesses for the target architecture. A performance analysis shows good portability across x86 and ARM CPUs, GPUs from different vendors, and even two variants of Intel Stratix 10 FPGAs. Measuring the energy to solution shows that GPUs yield an up to 10x higher energy efficiency in terms of degrees of freedom per joule compared to CPUs. With custom designed caches, FPGAs offer a meaningful complement to the other architectures with particularly good computational performance on smaller meshes. FPGAs with High Bandwidth Memory are less affected by bandwidth issues and have similar energy efficiency as latest generation CPUs.}}, author = {{Büttner, Markus and Alt, Christoph and Kenter, Tobias and Köstler, Harald and Plessl, Christian and Aizinger, Vadym}}, issn = {{1573-0484}}, journal = {{The Journal of Supercomputing}}, number = {{6}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Analyzing performance portability for a SYCL implementation of the 2D shallow water equations}}}, doi = {{10.1007/s11227-025-07063-7}}, volume = {{81}}, year = {{2025}}, } @inproceedings{62066, abstract = {{In the context of high-performance computing (HPC) for distributed workloads, individual field-programmable gate arrays (FPGAs) need efficient ways to exchange data, which requires network infrastructure and software abstractions. Dedicated multi-FPGA clusters provide inter-FPGA networks for direct device to device communication. The oneAPI high-level synthesis toolchain offers I/O pipes to allow user kernels to interact with the networking ports of the FPGA board. In this work, we evaluate using oneAPI I/O pipes for direct FPGA-to-FPGA communication by scaling a SYCL implementation of a Jacobi solver on up to 25 FPGAs in the Noctua 2 cluster. We see good results in weak and strong scaling experiments.}}, author = {{Alt, Christoph and Plessl, Christian and Kenter, Tobias}}, booktitle = {{Proceedings of the 13th International Workshop on OpenCL and SYCL}}, isbn = {{9798400713606}}, keywords = {{Multi-FPGA, High-level Synthesis, oneAPI, FPGA}}, publisher = {{Association for Computing Machinery}}, title = {{{Evaluating oneAPI I/O Pipes in a Case Study of Scaling a SYCL Jacobi Solver to multiple FPGAs}}}, doi = {{10.1145/3731125.3731131}}, year = {{2025}}, } @inbook{62039, author = {{Vernholz, Mats and Temmen, Katrin}}, booktitle = {{Towards inclusive and egalitarian vocational education and training: Key challenges and strategies from a holistic and multi-contextual approach. Proceedings of the 6th Crossing Boundaries Conference in Vocational Education and Training}}, editor = {{Quintana-Murci, Elena and Salva-Mut, Francisca and Stalder, Barbara Elisabeth and Nägele, Christof}}, publisher = {{LibreCat University}}, title = {{{Why Engineering Students Choose a Career in Teacher Education – Qualitative Analysis of Bachelor Students' Motives}}}, doi = {{10.5281/ZENODO.15364031}}, year = {{2025}}, } @article{62111, abstract = {{Abstract The execution of incompatible actions imposes costs on action planning, commonly known as response-response incompatibility-costs. This phenomenon is also evident in sports: A basketball player who performs a pass in one direction whilst orienting the head into the contrary direction (pass with head fake) needs more time to initiate the action as if pass direction and head orientation are the same (pass without head fake). The aim of this study was twofold: First, we present a re-analysis of the data from Böer et al. (Psychological Research 88:523–524, 2024) using mixture effect modelling (Miller, Behavior Research Methods 38:92–106, 2006) explore if fake-production costs manifest continuously (uniform effect) in all participants or if some participants show fake-production costs occasionally but substantially (mixed effect). Second, we collected data of a control group which was analysed with the previous data of the practice group and fitted initiation times (ITs) to an ex-Gaussian distribution. The analysis of mixture effects revealed that most participants exhibited a uniform effect when they didn’t have time to mentally prepare the movement. This pattern was not changed by practice, suggesting fake-production costs can’t be overcome by practice alone without mental preparation time. The analysis of mean ITs revealed improvements in the practice group but not in the control group, independent of the type of pass performed. The distribution analyses complemented these findings as it showed that the improvement in participants’ performance with increasing practice can mainly be attributed to a reduction of the exponential part of the distribution (parameter tau).}}, author = {{Böer, Nils Tobias and Schütz, Christoph and Weigelt, Matthias and Güldenpenning, Iris}}, issn = {{0340-0727}}, journal = {{Psychological Research}}, keywords = {{Sport Psychology, Sport Science, Deception, Distribution Analysis}}, number = {{2}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{How does practice modulate fake-production costs in a basketball task? Analyses of frequency distributions and mixture effects}}}, doi = {{10.1007/s00426-025-02084-6}}, volume = {{89}}, year = {{2025}}, } @inproceedings{62116, author = {{Böer, Nils Tobias and Güldenpenning, Iris and Weigelt, Matthias}}, booktitle = {{57th Herbsttreffen der experimentellen Kognitionspsychologie (HExKoP)}}, keywords = {{Deception, Sport Psychology, Social Interaction}}, location = {{Trier}}, title = {{{The mere presence of a social partner modulates fake-production costs}}}, year = {{2025}}, } @inproceedings{62083, author = {{Nölle, Florian and Schmid, Hans-Joachim}}, booktitle = {{Tag der Lehre 2025}}, location = {{Universität Paderborn, Paderborn}}, title = {{{Erfolgreich Studieren – sinnvolle Lernstrategien erlernen}}}, year = {{2025}}, } @inbook{62127, abstract = {{Henzes Privatbibliothek aus seinem Besitz in La Leprara bei Marino südlich von Rom, in dem er fast fünfzig Jahre seines Lebens verbracht und viele seiner großen Werke geschrieben hat, wurde nach dem Verkauf des Anwesens der Bibliothek des Musikwissenschaftlichen Seminars der Universität Paderborn/Hochschule für Musik Detmold per Schenkung als Sondersammlung übergeben. Die Privatbibliothek ist nunmehr vollständig inventarisiert und somit der Öffentlichkeit zugänglich gemacht. Der Text beschreibt in einer ersten Bestandsaufnahme den Charakter und die Schwerpunkte dieser Sammlung und stellt erste Forschungsfragen an den Bestand: Er fragt etwa nach den Erkenntnissen, die sich aus den über 600 handschriftlichen Widmungen in Büchern und über 150 Widmungen in Noten im Hinblick auf Henzes persönliches Netzwerk und seine Biografie ergeben und wertet einige Widmungskonvolute aus. Abstract (EN) Henze's personal library, which belonged to him in La Leprara near Marino south of Rome, where he spent almost fifty years of his life and wrote many of his important works, was donated to the library of the Musicology Seminar of the University of Paderborn/Detmold University of Music as a collection after the sale of the estate. The private library has now been completely catalogued and is thus accessible to the public. The text provides an initial overview of the character and focus of this collection and poses research questions about the holdings: For example, it asks what insights can be gained from the more than 600 handwritten dedications in books and over 150 dedications in sheet music with regard to Henze's personal network and his biography, and evaluates some of the collections of dedications.}}, author = {{Tumat, Antje}}, booktitle = {{Musik, Netzwerke, Selbstzeugnisse. Aktuelle Forschung zu Hans Werner Henze}}, editor = {{Tumat, Antje and Minetti, Elena and Ried, Dennis and Capelle, Irmlind}}, keywords = {{Hans Werner Henze, Privatbibliothek, Neue Musik}}, pages = {{23--40}}, publisher = {{musiconn.publish}}, title = {{{„Ein Komponistenleben des 20. Jahrhunderts“. Erste Bestandsaufnahme und Forschungsfragen zu Hans Werner Henzes Privatbibliothek als Sondersammlung}}}, doi = {{10.25366/2025.158}}, year = {{2025}}, } @book{62056, abstract = {{Der Sammelband veröffentlicht die Beiträge des internationalen Symposiums zu Hans Werner Henze, das im Dezember 2022 in Detmold stattfand und aktuelle Beiträge zur Henze-Forschung mit unterschiedlichsten inhaltlichen Schwerpunkten wie Filmmusik, Gender Studies oder Musikanalyse versammelt. Nach zwei Aufsätzen zu neuen Henze-Briefausgaben (Irmlind Capelle / Elena Minetti / Dennis Ried / Antje Tumat einerseits und Andreas Hérm Baumgartner / Wolfgang Rathert andererseits) und einem ersten Überblick über Henzes Privatbibliothek als Sondersammlung (Antje Tumat) diskutiert Adrian Kuhl Die Zusammenarbeit Tatjana Gsovskys und Hans Werner Henzes beim Ballett Der Idiot. Zafer Özgen beschäftigt sich anschließend mit Kompositionsstrategien in Henzes frühen Opern, Federica Marsico betrachtet die Figur des Orpheus bei Henze aus Gender-Perspektive und Benedikt Leßmann widmet sich Henzes Filmmusik. Den Abschluss bildet ein Roundtable mit Zeitzeugen, bei dem ehemalige Kolleginnen und Kollegen, Freunde und andere mit Henze verbundene Personen aus ihrer Zusammenarbeit mit Henze berichten. Teilnehmende waren Henzes langjähriger Freund und enger Mitarbeiter in Montepulciano Gastón Fournier-Facio (Rom) und der Regisseur, Geschäftsführer der Henze-Stiftung und letzte Lebensbegleiter Henzes Michael Kerstan (Nürnberg), Simon Obert von der Paul Sacher Stiftung (Basel), dem Aufbewahrungsort der Sammlung Hans Werner Henze, sowie Peter Petersen (Hamburg) als Stellvertreter der frühen musikwissenschaftlichen Henze-Forschung.}}, editor = {{Tumat, Antje and Minetti, Elena and Ried, Dennis and Capelle, Irmlind}}, pages = {{206}}, title = {{{Musik, Netzwerke, Selbstzeugnisse. Aktuelle Forschung zu Hans Werner Henze}}}, doi = {{10.25366/2025.156}}, year = {{2025}}, } @misc{62128, author = {{Markewitz, Friedrich and Bäumer, Benjamin}}, booktitle = {{Diskursmonitor. Glossar zur strategischen Kommunikation in öffentlichen Diskursen}}, title = {{{Tarnschrift}}}, year = {{2025}}, } @misc{62130, author = {{Markewitz, Friedrich}}, booktitle = {{Diskursmonitor. Glossar zur strategischen Kommunikation in öffentlichen Diskursen}}, title = {{{Diskreditieren}}}, year = {{2025}}, }