@article{56584, author = {{Suri, Ali}}, journal = {{Journal of Geometry and Physics}}, pages = {{105109}}, title = {{{Curvature and stability of quasi-geostrophic motion}}}, volume = {{198}}, year = {{2024}}, } @article{56585, author = {{Suri, Ali}}, journal = {{Journal of Geometry and Physics}}, pages = {{105333}}, title = {{{Conjugate points along spherical harmonics}}}, volume = {{206}}, year = {{2024}}, } @article{49655, abstract = {{In today's digital world, data-driven digital artefacts pose challenges for education, as many students lack an understanding of data and feel powerless when interacting with them. This article addresses these challenges and introduces the data awareness framework. It focuses on understanding data-driven technologies and reflecting on the role of data in everyday life. The paper also presents an empirical study on young school students' data awareness. The study involves a teaching unit on data awareness framed by a pretest-posttest design using a questionnaire on students' awareness and understanding of and reflection on data practices of data-driven digital artefacts. The study's findings indicate that the data awareness framework supports students in understanding data practices of data-driven digital artefacts. The findings also suggest that the framework encourages students to reflect on these data practices and think about their daily behaviour. Students learn a model about interactions with data-driven digital artefacts and use it to analyse data-driven applications. This approach appears to enable students to understand these artefacts from everyday life and reflect on these interactions. The work contributes to research on data and AI literacies and suggests a way to support students in developing self-determination and agency during interactions with data-driven digital artefacts.}}, author = {{Höper, Lukas and Schulte, Carsten}}, issn = {{2398-5348}}, journal = {{Information and Learning Sciences}}, keywords = {{Library and Information Sciences, Computer Science Applications, Education}}, number = {{7/8}}, pages = {{491--512}}, publisher = {{Emerald}}, title = {{{The data awareness framework as part of data literacies in K-12 education}}}, doi = {{10.1108/ils-06-2023-0075}}, volume = {{125}}, year = {{2024}}, } @article{56578, abstract = {{Approaches to modeling and evaluating teachers’ digital competencies are often based on the TPACK model. However, in-depth analyses of the conceptualization of the model show that the specificities of the so-called dual subject matter of vocational education are not sufficiently represented. This article provides insights into the development and testing of an instrument for teachers’ self-assessment of digital competencies in vocational education.The instrument is based on the structure of TPACK but is adapted in various ways to reflect the specificities of vocational education. The aim of this article is to transfer a conceptual extension oft he TPACK model into an initial instrument and to analyze it as part of an initial exploration. }}, author = {{Sänger, Niklas}}, journal = {{International Journal of Vocational Education Studies}}, keywords = {{Digital Competencies, Dual Subject Matter, Evaluation, TPACK, Vocational Teacher Training}}, number = {{2}}, pages = {{35--55}}, title = {{{Evaluation of Digital Competencies - Development of an Instrument for Vocational Teacher Training}}}, doi = {{https://doi.org/10.14361/ijves-2024-010203}}, volume = {{1}}, year = {{2024}}, } @inbook{56606, abstract = {{AbstractMost FPGA boards in the HPC domain are well-suited for parallel scaling because of the direct integration of versatile and high-throughput network ports. However, the utilization of their network capabilities is often challenging and error-prone because the whole network stack and communication patterns have to be implemented and managed on the FPGAs. Also, this approach conceptually involves a trade-off between the performance potential of improved communication and the impact of resource consumption for communication infrastructure, since the utilized resources on the FPGAs could otherwise be used for computations. In this work, we investigate this trade-off, firstly, by using synthetic benchmarks to evaluate the different configuration options of the communication framework ACCL and their impact on communication latency and throughput. Finally, we use our findings to implement a shallow water simulation whose scalability heavily depends on low-latency communication. With a suitable configuration of ACCL, good scaling behavior can be shown to all 48 FPGAs installed in the system. Overall, the results show that the availability of inter-FPGA communication frameworks as well as the configurability of framework and network stack are crucial to achieve the best application performance with low latency communication.}}, author = {{Meyer, Marius and Kenter, Tobias and Petrica, Lucian and O’Brien, Kenneth and Blott, Michaela and Plessl, Christian}}, booktitle = {{Lecture Notes in Computer Science}}, isbn = {{9783031697654}}, issn = {{0302-9743}}, publisher = {{Springer Nature Switzerland}}, title = {{{Optimizing Communication for Latency Sensitive HPC Applications on up to 48 FPGAs Using ACCL}}}, doi = {{10.1007/978-3-031-69766-1_9}}, year = {{2024}}, } @inproceedings{56605, author = {{Opdenhövel, Jan-Oliver and Alt, Christoph and Plessl, Christian and Kenter, Tobias}}, booktitle = {{2024 34th International Conference on Field-Programmable Logic and Applications (FPL)}}, publisher = {{IEEE}}, title = {{{StencilStream: A SYCL-based Stencil Simulation Framework Targeting FPGAs}}}, doi = {{10.1109/fpl64840.2024.00023}}, year = {{2024}}, } @inproceedings{56607, author = {{Tareen, Abdul Rehman and Meyer, Marius and Plessl, Christian and Kenter, Tobias}}, booktitle = {{2024 IEEE 32nd Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM)}}, publisher = {{IEEE}}, title = {{{HiHiSpMV: Sparse Matrix Vector Multiplication with Hierarchical Row Reductions on FPGAs with High Bandwidth Memory}}}, doi = {{10.1109/fccm60383.2024.00014}}, volume = {{35}}, year = {{2024}}, } @inproceedings{56609, abstract = {{The computation of electron repulsion integrals (ERIs) is a key component for quantum chemical methods. The intensive computation and bandwidth demand for ERI evaluation presents a significant challenge for quantum-mechanics-based atomistic simulations with hybrid density functional theory: due to the tens of trillions of ERI computations in each time step, practical applications are usually limited to thousands of atoms. In this work, we propose SERI, a high-throughput streaming accelerator for ERI computation on HBM-based FPGAs. In contrast to prior buffer-based designs, SERI proposes a novel streaming architecture to address the on-chip buffer limitation and the floorplanning challenge, and leverages the high-bandwidth memory to overcome the bandwidth bottleneck in prior designs. Moreover, to meet the varying computation, bandwidth, and floorplanning requirements between the 55 canonical quartet classes in ERI calculation, we design an automation tool, together with an accurate performance model, to automatically customize the architecture and floorplanning strategy for each canonical quartet class to maximize their throughput. Our performance evaluation on the AMD/Xilinx Alveo U280 FPGA board shows that, SERI achieves an average speedup of 9.80 x over the previous best-performing FPGA design, a 3.21x speedup over a 64-core AMD EPYC 7713 CPU, and a 15.64x speedup over an Nvidia A40 GPU. It reaches a peak throughput of 23.8 GERIS ($10^9$ ERIs per second) on one Alveo U280 FPGA. SERI will be released soon at https://github.com/SFU-HiAccel/SERI.}}, author = {{Stachura, Philip and Li, Guanyu and Wu, Xin and Plessl, Christian and Fang, Zhenman}}, booktitle = {{2024 34th International Conference on Field-Programmable Logic and Applications (FPL)}}, pages = {{60--68}}, publisher = {{IEEE}}, title = {{{SERI: High-Throughput Streaming Acceleration of Electron Repulsion Integral Computation in Quantum Chemistry using HBM-based FPGAs}}}, doi = {{10.1109/fpl64840.2024.00018}}, year = {{2024}}, } @article{56634, author = {{Meier, Heiko}}, issn = {{1610-3181}}, journal = {{Sport und Gesellschaft}}, number = {{2}}, pages = {{193--197}}, title = {{{Hans Lenk (1985): Die achte Kunst}}}, doi = {{10.1515/sug-2024-2013}}, volume = {{21}}, year = {{2024}}, } @article{56608, abstract = {{AbstractA new control method aims at the precise high dynamic control of the force signal for experimental vibration analysis, which is generated by an electrodynamic shaker. A bending beam is used as a nonlinear test object. A design and a surrogate model of the test rig are shown and parameterized based on test rig measurements. The force control algorithm using input/output linearisation is described and implemented in Matlab/Simulink for simulative validation studies. Conclusions drawn from the mathematical description of the problem as well as simulation results show that the design of the contact between shaker and test object is crucial to achieve a high control bandwidth and at the same time reduce the energy consumption of the shaker. This leads to the practical application using a novel damping contact element. Finally, experimental test rig results are presented which show a closed loop bandwidth of at least 250 Hz for sinusoidal excitation signals.}}, author = {{Lüke, Christopher and Trächtler, Ansgar}}, issn = {{0015-7899}}, journal = {{Forschung im Ingenieurwesen}}, number = {{1}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Highly dynamic force control for experimental vibration analysis with an electrodynamic shaker Hochdynamische Kraftregelung für die experimentelle Schwingungsanalyse mit einem elektrodynamischen Shaker}}}, doi = {{10.1007/s10010-024-00757-z}}, volume = {{88}}, year = {{2024}}, } @article{54847, abstract = {{The widespread adoption of ultra-high strength steels, due to their high bulk resistivity, intensifies expulsion issues in resistance spot welding (RSW), deteriorating both the spot weld and surface quality. This study presents a novel approach to prevent expulsion by employing a preheating current. Through characteristic analysis of joint formation under critical welding current, the importance of plastic material encapsulation around the weld nugget (plastic shell) at high temperatures in preventing expulsion is highlighted. To evaluate the effect of preheating on the plastic shell and understand its mechanism in expulsion prevention, a two-dimensional welding simulation model for dissimilar ultra-high strength steel joints was established. The results showed that optimal preheating enhances the thickness of the plastic shell, improving its ability to encapsulate the weld nugget during the primary welding phase, thereby diminishing expulsion risks. Experimental validation confirmed that by employing the optimal preheating current, the maximum nugget diameter was enhanced to 9.42 mm, marking an increase of 13.4 % and extending the weldable current range by 27.5 %. Under quasi-static cross-tensile loading, joints with preheating demonstrated a 7.9 % enhancement in maximum load-bearing capacity compared to joints without preheating, showing a reproducible and complete pull-out failure mode within the heat-affected zone. This study offers a prevention method based on underlying mechanisms, providing a new perspective for future research on welding parameter optimization with the aim of expulsion prevention.}}, author = {{Yang, Keke and El-Sari, Bassel and Olfert, Viktoria and Wang, Zhuoqun and Biegler, Max and Rethmeier, Michael and Meschut, Gerson}}, issn = {{1526-6125}}, journal = {{Journal of Manufacturing Processes}}, keywords = {{Expulsion Resistance spot welding Finite element modelling Preheating Weldable current range Ultra-high strength steel}}, pages = {{489--502}}, publisher = {{Elsevier BV}}, title = {{{Expulsion prevention in resistance spot welding of dissimilar joints with ultra-high strength steel: An analysis of the mechanism and effect of preheating current}}}, doi = {{10.1016/j.jmapro.2024.06.034}}, volume = {{124}}, year = {{2024}}, } @article{53610, abstract = {{PurposeThe relationship between variation in time perspectives and collaborative performance is scarcely explored, and even less is known about the respective mechanisms that lead to varying task performance. Thus, we aim to further the literature on time perspectives and collaborative performance, shedding light on the underlying behavioral patterns.Design/methodology/approachWe report a quasi-experiment analyzing the impact of past, present and future orientation variation in dyads (N = 76) on their quantitative and qualitative performance when confronted with a simple incentivized creative task with constraints. Subsequently, we offer a qualitative analysis of comments given by the participants after the task on the collaboration.FindingsResults indicate that a dyad's elevation of past orientation and diversity in future orientation negatively affect collaborative performance. At the same time, there is a positive effect of elevation of future orientation. The positive effect is driven by clear communication and agreement during the task, while the negative effect arises from work sharing and complementation.Practical implicationsThis study provides insights for organizations on composing individuals regarding their temporal focus for collaborative tasks that should be executed rapidly and require creative solutions.Originality/valueOur study distinguishes by considering the composition of past, present and future time perspectives in dyads and focuses on a creative task setting. Moreover, we explore the mechanisms in the dyads with a substantial elevation of/diversity in future orientation, leading to their stronger/weaker performance.}}, author = {{Auer, Thorsten Fabian and Hoppe, Julia Amelie and Thommes, Kirsten}}, issn = {{2051-6614}}, journal = {{Journal of Organizational Effectiveness: People and Performance}}, keywords = {{Organizational Behavior and Human Resource Management}}, number = {{4}}, pages = {{1023--1042}}, publisher = {{Emerald}}, title = {{{Time perspectives and collaborative performance in creative tasks}}}, doi = {{10.1108/joepp-07-2023-0285}}, volume = {{11}}, year = {{2024}}, } @inbook{56701, author = {{Mildorf, Jarmila}}, booktitle = {{Heilkraft der Literatur: Zur Bedeutung der Literatur für eine menschliche Medizin}}, editor = {{Wagner-Pischel, Marga Brigitte}}, isbn = {{978-3-662-70038-9}}, pages = {{280--303}}, publisher = {{Springer}}, title = {{{Professionalität und Menschlichkeit: Arzt-Patienten-Interaktionen in William Carlos Williams’ Kurzgeschichte „The Girl with a Pimply Face“}}}, doi = {{https://doi.org/10.1007/978-3-662-70039-6_14}}, year = {{2024}}, } @article{52229, author = {{Bruns, Bastian and Gross, Michel and Grünewald, Marcus and Bertsch, Valentin and Riese, Julia}}, issn = {{0959-6526}}, journal = {{Journal of Cleaner Production}}, keywords = {{Industrial and Manufacturing Engineering, Strategy and Management, General Environmental Science, Renewable Energy, Sustainability and the Environment, Building and Construction}}, publisher = {{Elsevier BV}}, title = {{{A multi-step framework for the design of a flexible power-to-methane process}}}, doi = {{10.1016/j.jclepro.2024.141434}}, year = {{2024}}, } @article{52388, author = {{Riese, Julia and Fasel, Henrik and Pannok, Maik and Lier, Stefan}}, issn = {{2352-5509}}, journal = {{Sustainable Production and Consumption}}, keywords = {{Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment, Environmental Chemistry, Environmental Engineering}}, publisher = {{Elsevier BV}}, title = {{{Decentralized production concepts for bio-based polymers - implications for supply chains, costs, and the carbon footprint}}}, doi = {{10.1016/j.spc.2024.03.001}}, year = {{2024}}, } @article{55654, author = {{Röder, Lilli Sophia and Gröngröft, Arne and Grünewald, Marcus and Riese, Julia}}, issn = {{0098-1354}}, journal = {{Computers & Chemical Engineering}}, publisher = {{Elsevier BV}}, title = {{{Optimization of Design and Operation of a Digestate Treatment Cascade for Demand Side Management Implementation}}}, doi = {{10.1016/j.compchemeng.2024.108838}}, year = {{2024}}, } @inbook{56743, abstract = {{Diskurspositionelle Konstruktionen von Marginalisierung, Randständigkeit und Ausschlusserfahrungen erscheinen als zunehmend wichtige strategische Momente postmoderner sowie postfaktischer Identitätsdiskurse Damit verbundene und als Mimikry der Marginalität interpretierbare Inszenierungsstrategien sollen in diesem Beitrag anhand des textkommunikativen Verhaltens Martin Heideggers erschlossen werden Anhand der sich in seinen Textkommunikaten wiederfindenden Strategien der selbstbezüglichen Marginalisierung, Stigmatisierung und Viktimisierung wird reflektiert, welche Diskursakteure unter welchen Bedingungen, mit welchen Strategien Mimikry der Marginalität nutzen. Zugleich soll die Notwendigkeit diskursethischer Re-Lektüren Martin Heideggers sichtbar gemacht werden}}, author = {{Markewitz, Friedrich}}, booktitle = {{Mimikry of Marginality}}, editor = {{Warnke, Ingo H. and Seiler Brylla, Charlotta and Bonacchi, Silvia}}, pages = {{246--269}}, publisher = {{Beltz}}, title = {{{Stagings of Selfmarginalization, -stigmatization and -victimization in Martin Heidegger's Textual Communications. Reflecions on the Necessity of a Discourse-Linguistic as well as a Discourse-Ethical Re-Reading of Heidegger's Communicative Behaviour}}}, volume = {{2}}, year = {{2024}}, } @inbook{55211, author = {{Ritter, Michael and Topalovic, Elvira}}, booktitle = {{Handbuch Grundschulpädagogik und Grundschuldidaktik}}, editor = {{Götz, Margarete and Hartinger, Andreas and Heinzel, Friederike and Kahlert, Joachim and Miller, Susanne and Sandfuchs, Uwe}}, pages = {{510 -- 518}}, publisher = {{Klinkhardt}}, title = {{{Deutschunterricht in der Grundschule. Entwicklungen – Diskurse – Perspektiven.}}}, year = {{2024}}, } @article{56778, author = {{Bernemann, Sören Antonius and Maćkowiak, J.F. and Maćkowiak, J. and Kenig, Eugeny}}, issn = {{0009-2509}}, journal = {{Chemical Engineering Science}}, publisher = {{Elsevier BV}}, title = {{{Computer aided flow investigation of liquid agricultural wastes}}}, doi = {{10.1016/j.ces.2024.120639}}, volume = {{300}}, year = {{2024}}, } @inproceedings{56844, author = {{Battefeld, Dominik and Liedeker, Felix and Cimiano, Philipp and Kopp, Stefan}}, booktitle = {{Proceedings of the 1st Workshop on Multimodal, Affective and Interactive eXplainable AI (MAI-XAI)}}, location = {{Santiago de Compostela, Spain}}, title = {{{ASCODI: An XAI-based interactive reasoning support system for justifiable medical diagnosing}}}, year = {{2024}}, }