TY - JOUR AU - Pfeifer, Florian AU - Knorr, Lukas AU - Schlosser, Florian AU - Marten, Thorsten AU - Tröster, Thomas ID - 46486 IS - 3 JF - Journal of Sustainable Development of Energy, Water and Environment Systems KW - Energy Engineering and Power Technology KW - Water Science and Technology KW - Environmental Science (miscellaneous) KW - Renewable Energy KW - Sustainability and the Environment SN - 1848-9257 TI - Ecological and Economic Feasibility of Inductive Heating for Sustainable Press Hardening Processes VL - 11 ER - TY - CONF AU - Elsner, Julia AU - Tenberge, Claudia AU - Fechner, Sabine ED - van Vorst, Helena ID - 45371 T2 - Lernen, Lehren und Forschen in einer digital geprägten Welt TI - Videoanalyse des Modellierprozesses von Grundschüler*innen VL - 43 ER - TY - GEN AU - Kundisch, Dennis ID - 46491 TI - #DIGITALENTS - Digital Talents Programm geht in die zweite Runde VL - 1 ER - TY - JOUR AU - Kempkes, J. P. AU - Kreuzhage, K. AU - Kundisch, Dennis AU - Seutter, Janina AU - Weskamp, Christoph ID - 45656 JF - Kultur Management Network Magazin TI - Digitale Transformation im Theater – Mittels Besucherforschung und Entscheidungsunterstützung zur besseren Angebotsgestaltung VL - 172 ER - TY - CONF AU - Gräßler, Iris AU - Wiechel, Dominik ID - 46502 T2 - 2023 18th Annual System of Systems Engineering Conference (SoSe) TI - Customized impact analyses for technical engineering changes ER - TY - JOUR AB - Purpose The purpose of this study is to investigate the manufacturability of Fe-3Si lattice structures and the resulting mechanical properties. This study could lead to the successful processing of squirrel cage conductors (a lattice structure by design) of an induction motor by additive manufacturing in the future. Design/methodology/approach The compression behaviour of two lattice structures where struts are arranged in a face-centred cubic position and vertical edges (FCCZ), and struts are placed at body-centred cubic (BCC) positions, prepared by laser powder bed fusion (LPBF), is explored. The experimental investigations are supported by finite element method (FEM) simulations. Findings The FCCZ lattice structure presents a peak in the stress-strain curve, whereas the BCC lattice structure manifests a plateau. The vertical struts aligned along the compression direction lead to a significant increase in the load-carrying ability of FCCZ lattice structures compared to BCC lattice structures. This results in a peak in the stress-strain curve. However, the BCC lattice structure presents the bending of struts with diagonal struts carrying the major loads with struts near the faceplate receiving the least load. A high concentration of geometrically necessary dislocations (GNDs) near the grain boundaries along cell formation is observed in the microstructure. Originality/value To the best of the authors’ knowledge, this is the first study on additive manufacturing of Fe-3Si lattice structures. Currently, there are no investigations in the literature on the manufacturability and mechanical properties of Fe-3Si lattice structures. AU - Pramanik, Sudipta AU - Hoyer, Kay-Peter AU - Schaper, Mirko ID - 46503 IS - 6 JF - Rapid Prototyping Journal KW - Industrial and Manufacturing Engineering KW - Mechanical Engineering SN - 1355-2546 TI - Experimental and finite element method investigation on the compression behaviour of FCCZ and BCC lattice structures of additively manufactured Fe-3Si samples VL - 29 ER - TY - JOUR AU - Pramanik, Sudipta AU - Milaege, Dennis AU - Hein, Maxwell AU - Andreiev, Anatolii AU - Schaper, Mirko AU - Hoyer, Kay-Peter ID - 46507 IS - 14 JF - Advanced Engineering Materials KW - Condensed Matter Physics KW - General Materials Science SN - 1438-1656 TI - An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures VL - 25 ER - TY - GEN AU - Andreiev, Anatolii AU - Hoyer, Kay-Peter AU - Hengsbach, Florian AU - Haase, Michael AU - Schaper, Mirko ID - 46504 TI - Powder Bed Fusion of Soft-Magnetic Iron-Silicon-Based Alloys: Advantages and Challenges ER - TY - CONF AB - Purpose: Data integration and applications across knowledge graphs (KGs) rely heavily on the discovery of links between resources within these KGs. Geospatial link discovery algorithms have to deal with millions of point sets containing billions of points. Methodology: To speed up the discovery of geospatial links, we propose COBALT. COBALT combines the content measures with R-tree indexing. The content measures are based on the area, diagonal and distance of the minimum bounding boxes of the polygons which speeds up the process but is not perfectly accurate. We thus propose two polygon splitting approaches for improving the accuracy of COBALT. Findings: Our experiments on real-world datasets show that COBALT is able to speed up the topological relation discovery over geospatial KGs by up to 1.47 × 104 times over state-of-the-art linking algorithms while maintaining an F-Measure between 0.7 and 0.9 depending on the relation. Furthermore, we were able to achieve an F-Measure of up to 0.99 by applying our polygon splitting approaches before applying the content measures. Value: The process of discovering links between geospatial resources can be significantly faster by sacrificing the optimality of the results. This is especially important for real time data-driven applications such as emergency response, location-based services and traffic management. In future work, additional measures, like the location of polygons or the name of the entity represented by the polygon, could be integrated to further improve the accuracy of the results. AU - Becker, Alexander AU - Ahmed, Abdullah Fathi Ahmed AU - Sherif, Mohamed AU - Ngonga Ngomo, Axel-Cyrille ID - 46514 KW - ahmed becker dice ngonga sail sherif T2 - SEMANTiCS TI - COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge Graphs ER - TY - JOUR AU - Ahmed, Abdullah Fathi AU - Sherif, Mohamed Ahmed AU - Ngomo, Axel-Cyrille Ngonga ID - 46517 JF - IEEE Access KW - General Engineering KW - General Materials Science KW - General Computer Science KW - Electrical and Electronic Engineering SN - 2169-3536 TI - NELLIE: Never-Ending Linking for Linked Open Data ER - TY - CHAP AB - Linked knowledge graphs build the backbone of many data-driven applications such as search engines, conversational agents and e-commerce solutions. Declarative link discovery frameworks use complex link specifications to express the conditions under which a link between two resources can be deemed to exist. However, understanding such complex link specifications is a challenging task for non-expert users of link discovery frameworks. In this paper, we address this drawback by devising NMV-LS, a language model-based verbalization approach for translating complex link specifications into natural language. NMV-LS relies on the results of rule-based link specification verbalization to apply continuous training on T5, a large language model based on the Transformerarchitecture. We evaluated NMV-LS on English and German datasets using well-known machine translation metrics such as BLUE, METEOR, ChrF++ and TER. Our results suggest that our approach achieves a verbalization performance close to that of humans and outperforms state of the art approaches. Our source code and datasets are publicly available at https://github.com/dice-group/NMV-LS. AU - Ahmed, Abdullah Fathi Ahmed AU - Firmansyah, Asep Fajar AU - Sherif, Mohamed AU - Moussallem, Diego AU - Ngonga Ngomo, Axel-Cyrille ID - 46516 SN - 0302-9743 T2 - Natural Language Processing and Information Systems TI - Explainable Integration of Knowledge Graphs Using Large Language Models ER - TY - CONF AU - Vogelsang, Christoph AU - Janzen, Thomas AU - Meier, Jana AU - Wotschel, Philipp ID - 46522 TI - „Die Prüfungen werden mich sicherlich nicht zu einer besseren Lehrkraft machen.“ Wie beurteilen Studierende Prüfungen und Feedback im Lehramtsstudium? ER - TY - CONF AU - Wotschel, Philipp AU - Vogelsang, Christoph AU - Janzen, Thomas AU - Meier, Jana ID - 46524 TI - Als Lehrkraft gut beraten? Entwicklung und Erprobung eines handlungsnahen Prüfungsformates zur Erfassung von Beratungskompetenz von Lehramtsstudierenden ER - TY - CONF AB - Purpose: This study addresses the limitations of current short abstracts of DBpedia entities, which often lack a comprehensive overview due to their creating method (i.e., selecting the first two-three sentences from the full DBpedia abstracts). Methodology: We leverage pre-trained language models to generate abstractive summaries of DBpedia abstracts in six languages (English, French, German, Italian, Spanish, and Dutch). We performed several experiments to assess the quality of generated summaries by language models. In particular, we evaluated the generated summaries using human judgments and automated metrics (Self-ROUGE and BERTScore). Additionally, we studied the correlation between human judgments and automated metrics in evaluating the generated summaries under different aspects: informativeness, coherence, conciseness, and fluency. Findings: Pre-trained language models generate summaries more concise and informative than existing short abstracts. Specifically, BART-based models effectively overcome the limitations of DBpedia short abstracts, especially for longer ones. Moreover, we show that BERTScore and ROUGE-1 are reliable metrics for assessing the informativeness and coherence of the generated summaries with respect to the full DBpedia abstracts. We also find a negative correlation between conciseness and human ratings. Furthermore, fluency evaluation remains challenging without human judgment. Value: This study has significant implications for various applications in machine learning and natural language processing that rely on DBpedia resources. By providing succinct and comprehensive summaries, our approach enhances the quality of DBpedia abstracts and contributes to the semantic web community AU - Zahera, Hamada Mohamed Abdelsamee AU - Vitiugin, Fedor AU - Sherif, Mohamed AU - Castillo, Carlos AU - Ngonga Ngomo, Axel-Cyrille ID - 46518 KW - dice enexa kiam ngonga porque sherif zahera T2 - SEMANTiCS TI - Using Pre-trained Language Models for Abstractive DBpedia Summarization: A Comparative Study ER - TY - DATA AB - Graffiti is an urban phenomenon that is increasingly attracting the interest of the sciences. To the best of our knowledge, no suitable data corpora are available for systematic research until now. The Information System Graffiti in Germany project (Ingrid) closes this gap by dealing with graffiti image collections that have been made available to the project for public use. Within Ingrid, the graffiti images are collected, digitized and annotated. With this work, we aim to support the rapid access to a comprehensive data source on Ingrid targeted especially by researchers. In particular, we present IngridKG, an RDF knowledge graph of annotated graffiti, abides by the Linked Data and FAIR principles. We weekly update IngridKG by augmenting the new annotated graffiti to our knowledge graph. Our generation pipeline applies RDF data conversion, link discovery and data fusion approaches to the original data. The current version of IngridKG contains 460,640,154 triples and is linked to 3 other knowledge graphs by over 200,000 links. In our use case studies, we demonstrate the usefulness of our knowledge graph for different applications. AU - Sherif, Mohamed AU - Morim da Silva, Ana Alexandra AU - Pestryakova, Svetlana AU - Ahmed, Abdullah Fathi Ahmed AU - Niemann, Sven AU - Ngonga Ngomo, Axel-Cyrille ID - 45558 TI - IngridKG: A FAIR Knowledge Graph of Graffiti ER - TY - JOUR AB - Multiprotein adsorption from complex body fluids represents a highly important and complicated phenomenon in medicine. In this work, multiprotein adsorption from diluted human serum at gold and oxidized iron surfaces is investigated at different serum concentrations and pH values. Adsorption-induced changes in surface topography and the total amount of adsorbed proteins are quantified by atomic force microscopy (AFM) and polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS), respectively. For both surfaces, stronger protein adsorption is observed at pH 6 compared to pH 7 and pH 8. PM-IRRAS furthermore provides some qualitative insights into the pH-dependent alterations in the composition of the adsorbed multiprotein films. Changes in the amide II/amide I band area ratio and in particular side-chain IR absorption suggest that the increased adsorption at pH 6 is accompanied by a change in protein film composition. Presumably, this is mostly driven by the adsorption of human serum albumin, which at pH 6 adsorbs more readily and thereby replaces other proteins with lower surface affinities in the resulting multiprotein film. AU - Huang, Jingyuan AU - Qiu, Yunshu AU - Lücke, Felix AU - Su, Jiangling AU - Grundmeier, Guido AU - Keller, Adrian ID - 46542 IS - 16 JF - Molecules KW - Chemistry (miscellaneous) KW - Analytical Chemistry KW - Organic Chemistry KW - Physical and Theoretical Chemistry KW - Molecular Medicine KW - Drug Discovery KW - Pharmaceutical Science SN - 1420-3049 TI - Multiprotein Adsorption from Human Serum at Gold and Oxidized Iron Surfaces Studied by Atomic Force Microscopy and Polarization-Modulation Infrared Reflection Absorption Spectroscopy VL - 28 ER - TY - JOUR AB - The influence of nanoscale surface topography on protein adsorption is highly important for numerous applications in medicine and technology. Herein, ferritin adsorption at flat and nanofaceted, single-crystalline Al2O3 surfaces is investigated using atomic force microscopy and X-ray photoelectron spectroscopy. The nanofaceted surfaces are generated by the thermal annealing of Al2O3 wafers at temperatures above 1000 °C, which leads to the formation of faceted saw-tooth-like surface topographies with periodicities of about 160 nm and amplitudes of about 15 nm. Ferritin adsorption at these nanofaceted surfaces is notably suppressed compared to the flat surface at a concentration of 10 mg/mL, which is attributed to lower adsorption affinities of the newly formed facets. Consequently, adsorption is restricted mostly to the pattern grooves, where the proteins can maximize their contact area with the surface. However, this effect depends on the protein concentration, with an inverse trend being observed at 30 mg/mL. Furthermore, different ferritin adsorption behavior is observed at topographically similar nanofacet patterns fabricated at different annealing temperatures and attributed to different step and kink densities. These results demonstrate that while protein adsorption at solid surfaces can be notably affected by nanofacet patterns, fine-tuning protein adsorption in this way requires the precise control of facet properties. AU - Pothineni, Bhanu K. AU - Kollmann, Sabrina AU - Li, Xinyang AU - Grundmeier, Guido AU - Erb, Denise J. AU - Keller, Adrian ID - 46543 IS - 16 JF - International Journal of Molecular Sciences KW - Inorganic Chemistry KW - Organic Chemistry KW - Physical and Theoretical Chemistry KW - Computer Science Applications KW - Spectroscopy KW - Molecular Biology KW - General Medicine KW - Catalysis SN - 1422-0067 TI - Adsorption of Ferritin at Nanofaceted Al2O3 Surfaces VL - 24 ER - TY - CONF AU - Kouagou, N’Dah Jean AU - Heindorf, Stefan AU - Demir, Caglar AU - Ngomo, Axel-Cyrille Ngonga ID - 46459 T2 - NeSy TI - Neural Class Expression Synthesis (Extended Abstract) VL - 3432 ER - TY - CHAP AB - Indonesian is classified as underrepresented in the Natural Language Processing (NLP) field, despite being the tenth most spoken language in the world with 198 million speakers. The paucity of datasets is recognized as the main reason for the slow advancements in NLP research for underrepresented languages. Significant attempts were made in 2020 to address this drawback for Indonesian. The Indonesian Natural Language Understanding (IndoNLU) benchmark was introduced alongside IndoBERT pre-trained language model. The second benchmark, Indonesian Language Evaluation Montage (IndoLEM), was presented in the same year. These benchmarks support several tasks, including Named Entity Recognition (NER). However, all NER datasets are in the public domain and do not contain domain-specific datasets. To alleviate this drawback, we introduce IndQNER, a manually annotated NER benchmark dataset in the religious domain that adheres to a meticulously designed annotation guideline. Since Indonesia has the world’s largest Muslim population, we build the dataset from the Indonesian translation of the Quran. The dataset includes 2475 named entities representing 18 different classes. To assess the annotation quality of IndQNER, we perform experiments with BiLSTM and CRF-based NER, as well as IndoBERT fine-tuning. The results reveal that the first model outperforms the second model achieving 0.98 F1 points. This outcome indicates that IndQNER may be an acceptable evaluation metric for Indonesian NER tasks in the aforementioned domain, widening the research’s domain range. AU - Gusmita, Ria Hari AU - Firmansyah, Asep Fajar AU - Moussallem, Diego AU - Ngonga Ngomo, Axel-Cyrille ID - 46572 SN - 0302-9743 T2 - Natural Language Processing and Information Systems TI - IndQNER: Named Entity Recognition Benchmark Dataset from the Indonesian Translation of the Quran ER - TY - JOUR AB - AbstractExternal visualization (i.e., physically embodied visualization) is central to the teaching and learning of mathematics. As external visualization is an important part of mathematics at all levels of education, it is diverse, and research on external visualization has become a wide and complex field. The aim of this scoping review is to characterize external visualizations in recent mathematics education research in order to develop a common ground and guide future research. A qualitative content analysis of the full texts of 130 studies published between 2018 and 2022 applied a deductive-inductive coding procedure to assess four dimensions: visualization product or process, type of visualization, media, and purpose. The analysis revealed different types of external visualizations including visualizations with physical resemblance ranging from pictorial to abstract visualizations as well as three types of visualizations with structural resemblance: length, area, and relational visualizations. Future research should include measures of visualization products or processes to help explain the demands and affordances that different types of visualizations present to learners and teachers. AU - Schoenherr, Johanna AU - Schukajlow, Stanislaw ID - 46569 JF - ZDM – Mathematics Education KW - General Mathematics KW - Education SN - 1863-9690 TI - Characterizing external visualization in mathematics education research: a scoping review ER - TY - CHAP AU - Vochatzer, Stefanie ED - Bentz , Julia ID - 46560 T2 - Creative Approaches to Climate and Peace Education. An Educationr’s Guide to Using Storytelling and Art TI - My first contact with the Foodsharing Initiative ER - TY - GEN AB - We study the effect of education on health (hospital stays, number of diagnosed conditions, self-rated poor health, and obesity) over the life-cycle in Germany, using compulsory schooling reforms as a source of exogenous variation. Our results suggest a positive correlation of health and education which increases over the life-cycle. We do not, however, find any positive local average treatment effects of an additional year of schooling on health or health care utilization for individuals up to age 79. An exception is obesity, where positive effects of schooling start to be visible around age 60 and become very large in age group 75-79. The results in age group 75-79 need to be interpreted with caution, however, due to small sample size and possible problems of attrition. AU - Schmitz, Hendrik AU - Tawiah, Beatrice Baaba ID - 46534 KW - Education KW - health KW - life-cycle effects KW - compulsory schooling TI - Life-cycle health effects of compulsory schooling VL - 1006 ER - TY - CONF AU - Baci, Alkid AU - Heindorf, Stefan ID - 46575 T2 - CIKM TI - Accelerating Concept Learning via Sampling ER - TY - GEN AU - Freise, Diana AU - Schiele, Valentin AU - Schmitz, Hendrik ID - 46521 KW - General Earth and Planetary Sciences KW - General Environmental Science SN - 1556-5068 TI - Housing Situations and Local COVID-19 Infection Dynamics – A Case Study With Small-Area Data ER - TY - GEN AB - The Koopman operator has become an essential tool for data-driven analysis, prediction and control of complex systems, the main reason being the enormous potential of identifying linear function space representations of nonlinear dynamics from measurements. Until now, the situation where for large-scale systems, we (i) only have access to partial observations (i.e., measurements, as is very common for experimental data) or (ii) deliberately perform coarse graining (for efficiency reasons) has not been treated to its full extent. In this paper, we address the pitfall associated with this situation, that the classical EDMD algorithm does not automatically provide a Koopman operator approximation for the underlying system if we do not carefully select the number of observables. Moreover, we show that symmetries in the system dynamics can be carried over to the Koopman operator, which allows us to massively increase the model efficiency. We also briefly draw a connection to domain decomposition techniques for partial differential equations and present numerical evidence using the Kuramoto--Sivashinsky equation. AU - Peitz, Sebastian AU - Harder, Hans AU - Nüske, Feliks AU - Philipp, Friedrich AU - Schaller, Manuel AU - Worthmann, Karl ID - 46579 T2 - arXiv:2307.15325 TI - Partial observations, coarse graining and equivariance in Koopman operator theory for large-scale dynamical systems ER - TY - GEN AB - We study the effect of education on vaccination against COVID-19 and influenza in Germany and Europe. Our identification strategy makes use of changes in compulsory schooling laws and allows to estimate local average treatment effects for individuals between 59 and 91 years of age. We find no significant effect of an additional year of schooling on vaccination status in Germany. Pooling data from Europe, we conclude that schooling increases the likelihood to vaccinate against COVID by an economically negligible effect of one percentage point (zero for influenza). However, we find indications that additional schooling increases fear of side effects from COVID vaccination. AU - Monsees, Daniel AU - Schmitz, Hendrik ID - 46536 KW - COVID KW - influenza KW - vaccination KW - education KW - compulsory schooling TI - The effect of compulsory schooling on vaccination against COVID and Influenza VL - 1011 ER - TY - CONF AB - One of the main challenges for next generation automotive radars is the improvement of angular resolution to a sub-degree level. In this context, wide aperture automotive radars of 1m length or more and resolution close to 0.1° in azimuth and 0.5° in elevation could be beneficial. To enable coherent processing of arrays with such large aperture, prior (i.e offline) and online calibration are necessary: channel imbalances (gains and phases) and three dimensional coordinates of transmit and receive elements need to be determined. We propose a calibration strategy based on alternating steps between the two subtasks of i) channel imbalance estimation with ‘known’ array positions, by applying a singular value decomposition to the resulting tensor calculus problem; and ii) antenna position estimation with ’known’ channel imbalances, by numerically maximizing the Bayesian posterior probability; in both cases operating on range/Doppler snapshots of disjoint targets (with potentially unknown locations). Simulation studies based on the parameters of a MIMO 8x6 linear sparse array show promising results as long as the initial position errors do not exceed half a wavelength (2mm), beyond which we observe strong effects of ambiguity. Experimental results with real measurements show that after calibration in laboratory conditions, our MIMO 8x6 demonstrator with 50cm aperture is able to resolve two targets at the same range with angular separation at least as close as 0.4°. AU - Greiff, Christian AU - Mateos-Núñez, David AU - Simoni, Renato AU - González-Huici, Maria AU - Kruse, Stephan AU - Scheytt, J. Christoph AU - Kolk, Karl AU - Höller, Christian AU - Kurz, Heiko Gustav AU - Meinecke, Marc-Michael AU - Gisder, Thomas ID - 46426 T2 - 2023 24th International Radar Symposium (IRS) TI - Calibration of Large Coherent MIMO Radar Arrays: Channel Imbalances and 3D Antenna Positions ER - TY - GEN AU - Ostermann, Moritz AU - Behm, Jonathan AU - Marten, Thorsten AU - Tröster, Thomas ID - 42459 T2 - WerkstoffPlus Auto 13. Fachtagung für neue Fahrzeug- und Werkstoffkonzepte TI - NeMo.bil - Dekarbonisierung des Verkehrs mithilfe von Leichtbau-Fahrzeugschwärmen ER - TY - JOUR AU - Kaur, Mannat AU - Ramulu, Harshini Sri AU - Acar, Yasemin AU - Fiebig, Tobias ID - 45984 IS - CSCW1 JF - Proc. ACM Hum. Comput. Interact. TI - "Oh yes! over-preparing for meetings is my jam :)": The Gendered Experiences of System Administrators VL - 7 ER - TY - JOUR AU - Bouma-Sims, Elijah AU - Acar, Yasemin ID - 45983 IS - CSCW1 JF - Proc. ACM Hum. Comput. Interact. TI - Beyond the Boolean: How Programmers Ask About, Use, and Discuss Gender VL - 7 ER - TY - JOUR AU - Vöing, Nerea ID - 46622 JF - Lehren im Leben - Blog der Stiftung Innovation in der Hochschullehre TI - 16 Fragen, 16 Antworten: In unserer Rubrik „Lehren im Leben” stellen wir Menschen vor, die Hochschullehre gestalten. Folge 6: Dr. Nerea Vöing VL - 6 ER - TY - GEN AB - We discuss in which cases the Dunkl convolution of distributions, possibly both with non-compact support, can be defined and study its analytic properties. We prove results on the (singular-)support of Dunkl convolutions. Based on this, we are able to prove a theorem on elliptic regularity for a certain class of Dunkl operators, called elliptic Dunkl operators. Finally, for the root systems of type A we consider the Dunkl-type Riesz distributions, prove that their Dunkl convolution exists and compute their convolution. AU - Brennecken, Dominik ID - 46614 T2 - arXiv:2308.07710 TI - Dunkl convolution and elliptic regularity for Dunkl operators ER - TY - JOUR AU - Vöing, Nerea ID - 46623 JF - Trafohaus//Lehre (Podcast der HD Sachsen) TI - Ein Blick auf Lehre und Lernen in Hochschulen durch die Brille der Hochschuldidaktik" ER - TY - GEN AU - Vöing, Nerea AU - Arnold, Maik AU - Reisas, Sabine ID - 46624 TI - Lehrentwicklung durch Scholarship of Teaching and Learning – mit SoTL Hochschullehre beforschen, weiterentwickeln und teilen ER - TY - JOUR AU - Karakaya, Yasin AU - Somnitz, H. AU - Hermsen, A. AU - Gonchikzhapov, Munko AU - Kasper, Tina ID - 45602 JF - Applications in Energy and Combustion Science KW - Metastable particles KW - Nanomaterials KW - Quartz-crystal-microbalance KW - Molecular-beam mass spectrometry KW - Tetramethylsilane KW - Reaction kinetics SN - 2666-352X TI - Revisiting the initial reaction rates for TMS combustion and a new evidence for metastable silica nanoparticles in the gas-phase synthesis VL - 14 ER - TY - CONF AB - New technologies and materials carry significant potential for sustainable production and use of products. As an example, Additive Manufacturing technologies and materials promise lightweight design and energy efficient use of parts. Exhausting the full potential requires: a) consideration of uncertainties with respect to future capabilities, and b) upgradeable design guidelines to cover advancements consistently. The proposed approach merges concepts of Design-for-X with foresight algorithms of Scenario-Technique to derive actionable knowledge. It is validated by an application in the field of Additive Manufacturing, namely Metal Fused Deposition Modelling. Engineers benefit from the intuitive access to heterogeneous types of sustainability related information. AU - Gräßler, Iris AU - Mozgova, Iryna AU - Pottebaum, Jens AU - Ott, Manuel AU - Jung, Philipp AU - Hesse, Philipp ED - Teti, Roberto ID - 46451 KW - Design-for-X KW - Scenario-Technique KW - sustainability KW - uncertainty KW - Life-Cycle Engineering KW - Additive Manufacturing KW - Circular Economy T2 - Procedia CIRP ICME TI - Handling of uncertainties in the design of sustainable Additive Manufacturing products by merging Design-for-X and Scenario-Technique ER - TY - JOUR AB - A reliable, but cost-effective generation of single-photon states is key for practical quantum communication systems. For real-world deployment, waveguide sources offer optimum compatibility with fiber networks and can be embedded in hybrid integrated modules. Here, we present what we believe to be the first chip-size fully integrated fiber-coupled heralded single photon source (HSPS) module based on a hybrid integration of a nonlinear lithium niobate waveguide into a polymer board. Photon pairs at 810 nm (signal) and 1550 nm (idler) are generated via parametric down-conversion pumped at 532 nm in the LiNbO3 waveguide. The pairs are split in the polymer board and routed to separate output ports. The module has a size of (2 × 1) cm^2 and is fully fiber-coupled with one pump input fiber and two output fibers. We measure a heralded second-order correlation function of g_h(2)=0.05 with a heralding efficiency of η_h=3.5% at low pump powers AU - Kießler, Christian AU - Conradi, Hauke AU - Kleinert, Moritz AU - Quiring, Viktor AU - Herrmann, Harald AU - Silberhorn, Christine ID - 46644 IS - 14 JF - Optics Express KW - Atomic and Molecular Physics KW - and Optics SN - 1094-4087 TI - Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology VL - 31 ER - TY - CHAP AB - SoTL ist eine forschungsbasierte Haltung, die die Hochschullehre verbessern und innovieren will. Das deutschsprachige SoTL-Netzwerk hat fünf Thesen formuliert, die SoTL als Grundhaltung und Motor für Lehrentwicklung betonen. Der Beitrag diskutiert diese Thesen und stellt Aktivitäten des Netzwerks vor, die SoTL an Hochschulen und Universitäten fördern und vernetzen wollen. Dabei wird auch die Rolle der »Teacher-Researcher« hervorgehoben. AU - Arnold, Maik AU - Vöing, Nerea AU - Reisas, Sabine ID - 46647 SN - 2749-7623 T2 - Hochschulbildung: Lehre und Forschung TI - Scholarship of Teaching and Learning (SoTL) als Motor für eine inter- und transdisziplinäre Hochschuldidaktik ER - TY - CONF AU - Weller, Julian AU - Roesmann, Daniel AU - Eggert, Sönke AU - von Enzberg, Sebastian AU - Gräßler, Iris AU - Dumitrescu, Roman ID - 46493 SN - 2212-8271 T2 - Procedia CIRP TI - Identification and prediction of standard times in machining for precision steel tubes through the usage of data analytics VL - 119 ER - TY - CONF AU - Althaus, Maike AU - Grieger, Nicole AU - Vorbohle, Christian AU - Müller, Michelle AU - Kundisch, Dennis ID - 46646 TI - Business Models for Cultural Event Platforms - A Taxonomy Approach ER - TY - GEN AU - Mapura Ramirez, Luz Alejandra AU - Kenig, Eugeny Y. ID - 46591 TI - Zur Berechnug von flüssigkeitsseitigen Stoffübergagnskoeffizienten für Strukturpackungen ER - TY - JOUR AB - The Koopman operator has become an essential tool for data-driven approximation of dynamical (control) systems in recent years, e.g., via extended dynamic mode decomposition. Despite its popularity, convergence results and, in particular, error bounds are still quite scarce. In this paper, we derive probabilistic bounds for the approximation error and the prediction error depending on the number of training data points; for both ordinary and stochastic differential equations. Moreover, we extend our analysis to nonlinear control-affine systems using either ergodic trajectories or i.i.d. samples. Here, we exploit the linearity of the Koopman generator to obtain a bilinear system and, thus, circumvent the curse of dimensionality since we do not autonomize the system by augmenting the state by the control inputs. To the best of our knowledge, this is the first finite-data error analysis in the stochastic and/or control setting. Finally, we demonstrate the effectiveness of the proposed approach by comparing it with state-of-the-art techniques showing its superiority whenever state and control are coupled. AU - Nüske, Feliks AU - Peitz, Sebastian AU - Philipp, Friedrich AU - Schaller, Manuel AU - Worthmann, Karl ID - 23428 JF - Journal of Nonlinear Science TI - Finite-data error bounds for Koopman-based prediction and control VL - 33 ER - TY - GEN AB - Different conflicting optimization criteria arise naturally in various Deep Learning scenarios. These can address different main tasks (i.e., in the setting of Multi-Task Learning), but also main and secondary tasks such as loss minimization versus sparsity. The usual approach is a simple weighting of the criteria, which formally only works in the convex setting. In this paper, we present a Multi-Objective Optimization algorithm using a modified Weighted Chebyshev scalarization for training Deep Neural Networks (DNNs) with respect to several tasks. By employing this scalarization technique, the algorithm can identify all optimal solutions of the original problem while reducing its complexity to a sequence of single-objective problems. The simplified problems are then solved using an Augmented Lagrangian method, enabling the use of popular optimization techniques such as Adam and Stochastic Gradient Descent, while efficaciously handling constraints. Our work aims to address the (economical and also ecological) sustainability issue of DNN models, with a particular focus on Deep Multi-Task models, which are typically designed with a very large number of weights to perform equally well on multiple tasks. Through experiments conducted on two Machine Learning datasets, we demonstrate the possibility of adaptively sparsifying the model during training without significantly impacting its performance, if we are willing to apply task-specific adaptations to the network weights. Code is available at https://github.com/salomonhotegni/MDMTN. AU - Hotegni, Sedjro Salomon AU - Peitz, Sebastian AU - Berkemeier, Manuel Bastian ID - 46649 T2 - arXiv:2308.12243 TI - Multi-Objective Optimization for Sparse Deep Neural Network Training ER - TY - JOUR AU - Gonchikzhapov, Munko AU - Kasper, Tina ID - 46637 JF - Applications in Energy and Combustion Science KW - Nanoparticle synthesis KW - Flame spray pyrolysis KW - SpraySyn burner KW - Flame structure KW - Species distribution KW - Temperature distribution SN - 2666-352X TI - Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames VL - 15 ER - TY - JOUR AB - Many problems in science and engineering require an efficient numerical approximation of integrals or solutions to differential equations. For systems with rapidly changing dynamics, an equidistant discretization is often inadvisable as it results in prohibitively large errors or computational effort. To this end, adaptive schemes, such as solvers based on Runge–Kutta pairs, have been developed which adapt the step size based on local error estimations at each step. While the classical schemes apply very generally and are highly efficient on regular systems, they can behave suboptimally when an inefficient step rejection mechanism is triggered by structurally complex systems such as chaotic systems. To overcome these issues, we propose a method to tailor numerical schemes to the problem class at hand. This is achieved by combining simple, classical quadrature rules or ODE solvers with data-driven time-stepping controllers. Compared with learning solution operators to ODEs directly, it generalizes better to unseen initial data as our approach employs classical numerical schemes as base methods. At the same time it can make use of identified structures of a problem class and, therefore, outperforms state-of-the-art adaptive schemes. Several examples demonstrate superior efficiency. Source code is available at https://github.com/lueckem/quadrature-ML. AU - Dellnitz, Michael AU - Hüllermeier, Eyke AU - Lücke, Marvin AU - Ober-Blöbaum, Sina AU - Offen, Christian AU - Peitz, Sebastian AU - Pfannschmidt, Karlson ID - 21600 IS - 2 JF - SIAM Journal on Scientific Computing TI - Efficient time stepping for numerical integration using reinforcement learning VL - 45 ER - TY - CHAP AU - Dahms, Frederik AU - Homberg, Werner ID - 46691 SN - 2195-4356 T2 - Lecture Notes in Mechanical Engineering TI - Analysis and Modelling of the Deformation in the Manufacture of Flange-Contours by the Combined Friction-Spinning and Flow-Forming Process ER - TY - CONF AU - Garnefeld, I. AU - Böhm, Eva AU - Hanf, L. AU - Helm, S. ID - 46665 T2 - 2023 AMA Summer Academic Conference, San Francisco, CA TI - Unboxing video effectiveness – Does speech matter? ER - TY - CONF AU - Kessing, K. AU - Garnefeld, I. AU - Böhm, Eva ID - 46666 T2 - EMAC Annual Conference, Odense, Denmark TI - The dark and bright side of online reviews in manufacturer online shops ER - TY - CONF AU - Hanf, L. AU - Garnefeld, I. AU - Böhm, Eva AU - Helm, S. ID - 46667 T2 - EMAC Annual Conference, Odense, Denmark TI - Stimulating engagement with unboxing videos – Does speech matter? ER - TY - CONF AU - Sadeghi-Kohan, Somayeh AU - Hellebrand, Sybille AU - Wunderlich, Hans-Joachim ID - 46739 T2 - 2023 53rd Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W) TI - Low Power Streaming of Sensor Data Using Gray Code-Based Approximate Communication ER - TY - CONF AU - Janzen, Thomas AU - Wotschel, Philipp AU - Meier, Jana AU - Vogelsang, Christoph ID - 46740 T2 - EARLI 2023 TI - Assessing pre-service EFL teachers’ feedback performance in role-play-based simulations ER - TY - JOUR AU - Zscherp, Mario Fabian AU - Jentsch, Silas Aurel AU - Müller, Marius Johannes AU - Lider, Vitalii AU - Becker, Celina AU - Chen, Limei AU - Littmann, Mario AU - Meier, Falco AU - Beyer, Andreas AU - Hofmann, Detlev Michael AU - As, Donat Josef AU - Klar, Peter Jens AU - Volz, Kerstin AU - Chatterjee, Sangam AU - Schörmann, Jörg ID - 46741 IS - 33 JF - ACS Applied Materials & Interfaces KW - General Materials Science SN - 1944-8244 TI - Overcoming the Miscibility Gap of GaN/InN in MBE Growth of Cubic InxGa1–xN VL - 15 ER - TY - CONF AU - Müller, Michelle AU - Neumann, Jürgen ID - 33722 T2 - Proceedings of the 55th Hawaii International Conference on System Sciences (HICSS) TI - Bring me my Meal on your Wheel - An Empirical Analysis of the Impact of Food Delivery Platforms on Local Restaurant Employment ER - TY - JOUR AB - AbstractWorking conditions of knowledge workers have been subject to rapid change recently. Digital nomadism is no longer a phenomenon that relates only to entrepreneurs, freelancers, and gig workers. Corporate employees, too, have begun to uncouple their work from stationary (home) offices and 9-to-5 schedules. However, pursuing a permanent job in a corporate environment is still subject to fundamentally different values than postulated by the original notion of digital nomadism. Therefore, this paper explores the work identity of what is referred to as ‘corporate nomads’. By drawing on identity theory and the results of semi-structured interviews, the paper proposes a conceptualization of the corporate nomad archetype and presents nine salient identity issues of corporate nomads (e.g., holding multiple contradictory identities, the flexibility paradox, or collaboration constraints). By introducing the ‘corporate nomad’ archetype to the Information Systems literature, this article helps to rethink established conceptions of “home office” and socio-spatial configurations of knowledge work. AU - Marx, Julian AU - Stieglitz, Stefan AU - Brünker, Felix AU - Mirbabaie, Milad ID - 44143 JF - Business & Information Systems Engineering KW - Information Systems SN - 2363-7005 TI - Home (Office) is where your Heart is ER - TY - JOUR AU - Zander, K.K. AU - Nguyen, D. AU - Mirbabaie, Milad AU - Garnett, S.T. ID - 46487 JF - International Journal of Disaster Risk Reduction KW - Geology KW - Safety Research KW - Geotechnical Engineering and Engineering Geology KW - Building and Construction SN - 2212-4209 TI - Aware but not prepared: understanding situational awareness during the century flood in Germany in 2021 VL - 96 ER - TY - BOOK AB - In the proposal for our CRC in 2011, we formulated a vision of markets for IT services that describes an approach to the provision of such services that was novel at that time and, to a large extent, remains so today: „Our vision of on-the-fly computing is that of IT services individually and automatically configured and brought to execution from flexibly combinable services traded on markets. At the same time, we aim at organizing markets whose participants maintain a lively market of services through appropriate entrepreneurial actions.“ Over the last 12 years, we have developed methods and techniques to address problems critical to the convenient, efficient, and secure use of on-the-fly computing. Among other things, we have made the description of services more convenient by allowing natural language input, increased the quality of configured services through (natural language) interaction and more efficient configuration processes and analysis procedures, made the quality of (the products of) providers in the marketplace transparent through reputation systems, and increased the resource efficiency of execution through reconfigurable heterogeneous computing nodes and an integrated treatment of service description and configuration. We have also developed network infrastructures that have a high degree of adaptivity, scalability, efficiency, and reliability, and provide cryptographic guarantees of anonymity and security for market participants and their products and services. To demonstrate the pervasiveness of the OTF computing approach, we have implemented a proof-of-concept for OTF computing that can run typical scenarios of an OTF market. We illustrated the approach using a cutting-edge application scenario – automated machine learning (AutoML). Finally, we have been pushing our work for the perpetuation of On-The-Fly Computing beyond the SFB and sharing the expertise gained in the SFB in events with industry partners as well as transfer projects. This work required a broad spectrum of expertise. Computer scientists and economists with research interests such as computer networks and distributed algorithms, security and cryptography, software engineering and verification, configuration and machine learning, computer engineering and HPC, microeconomics and game theory, business informatics and management have successfully collaborated here. AU - Haake, Claus-Jochen AU - Meyer auf der Heide, Friedhelm AU - Platzner, Marco AU - Wachsmuth, Henning AU - Wehrheim, Heike ID - 45863 TI - On-The-Fly Computing -- Individualized IT-services in dynamic markets VL - 412 ER - TY - JOUR AU - Stieglitz, Stefan AU - Mirbabaie, Milad AU - Deubel, Annika AU - Braun, Lea-Marie AU - Kissmer, Tobias ID - 45458 JF - International Journal of Information Management KW - Library and Information Sciences KW - Computer Networks and Communications KW - Information Systems SN - 0268-4012 TI - The potential of digital nudging to bridge the gap between environmental attitude and behavior in the usage of smart home applications VL - 72 ER - TY - JOUR AU - Mirbabaie, Milad AU - Marx, Julian AU - Erle, Lukas ID - 46746 JF - Pacific Asia Journal of the Association for Information Systems SN - 1943-7544 TI - Digital Nudge Stacking and Backfiring: Understanding Sustainable E-Commerce Purchase Decisions ER - TY - DATA AB - Die Energieaufnahme von Haushaltskältegeräten ist seit den 1990er Jahren erheblich gesunken. Dieser Wert wird von den Herstellern im Neuzustand der Geräte unter Normbedingungen bestimmt. Wie jedes technische System unterliegen jedoch auch Haushaltskältegeräte einem Alterungsprozess, der zu einem Anstieg der Energieaufnahme über die Zeit führt. Im Rahmen dieser Dissertation wurde auf der Grundlage von 100 Messungen der Energieaufnahme, die an 32 Geräten über einen Zeitraum von 21 Jahren durchgeführt wurden, ein Alterungsmodell entwickelt. Dieses Modell ist das erste, das mit Hilfe von Daten der Energieaufnahme real gealterter Geräte entwickelt wurde. Es beschreibt einen Anstieg der Energieaufnahme von 27 % über die durchschnittliche Einsatzzeit eines Haushaltskältegeräts von 16 Jahren. Der stärkste Anstieg erfolgt in den ersten fünf Betriebsjahren. Durch Diffusionsvorgänge in dem im Gehäuse verbauten Polyurethan-Schaum wird das im Zellgas vorhandene Kohlenstoffdioxid durch Luft ersetzt. Hierdurch steigt die Wärmeleitfähigkeit des Schaums um ca. 33 % an, wodurch sich die Energieaufnahme der Geräte erhöht. Des Weiteren wurde der Einsatz von Paraffinen als Phasenwechselmaterial in Haushaltskältegeräten untersucht. Durch deren Einsatz konnte die Energieaufnahme gesenkt und die Funktionalität der Geräte gesteigert werden. Hierfür sind detaillierte Kenntnisse der Materialkenndaten der Paraffine notwendig. Die Wärmeleitfähigkeit der verschiedenen Paraffin-Stoffgruppen in der festen Phase ist jedoch bisher nur unzureichend untersucht worden. Daher wurde ein Messaufbau entwickelt, mit dem die Wärmeleitfähigkeit von festem Paraffin bestimmt werden kann, und es wurden entsprechende Messungen durchgeführt. AU - Paul, Andreas ID - 46753 TI - Analyse von Alterungsmechanismen im Hinblick auf die Effizienz von Haushaltskältegeräten ER - TY - JOUR AB - Qualitative comparative analysis (QCA) enables researchers in international management to better understand how the impact of a single explanatory factor depends on the context of other factors. But the analytical toolbox of QCA does not include a parameter for the explanatory power of a single explanatory factor or “condition”. In this paper, we therefore reinterpret the Banzhaf power index, originally developed in cooperative game theory, to establish a goodness-of-fit parameter in QCA. The relative Banzhaf index we suggest measures the explanatory power of one condition averaged across all sufficient combinations of conditions. The paper argues that the index is especially informative in three situations that are all salient in international management and call for a context-sensitive analysis of single conditions, namely substantial limited diversity in the data, the emergence of strong INUS conditions in the analysis, and theorizing with contingency factors. The paper derives the properties of the relative Banzhaf index in QCA, demonstrates how the index can be computed easily from a rudimentary truth table, and explores its insights by revisiting selected papers in international management that apply fuzzy-set QCA. It finally suggests a three-step procedure for utilizing the relative Banzhaf index when the causal structure involves both contingency effects and configurational causation. AU - Haake, Claus-Jochen AU - Schneider, Martin ID - 34114 JF - Journal of International Management KW - Qualitative comparative analysis KW - Banzhaf power index KW - causality KW - explanatory power TI - Playing games with QCA: Measuring the explanatory power of single conditions with the Banzhaf index ER - TY - CONF AU - Schwerin, Imke AU - Häsel-Weide, Uta ED - Novotna, J. ED - Moraova, H. ID - 46757 T2 - International Symposium in Elementary Mathematics Teaching. Proceedings: New Directions in Elementary Mathematics Education TI - Second grader´s understanding of doubling and halfing in various representations ER - TY - CHAP AU - Schmidt, Rebekka AU - Tenberge, Claudia AU - Häsel-Weide, Uta ED - Vöing, N. ED - Schmidt, R. ED - Neiske, I. ID - 46758 T2 - Aktive Teilhabe fördern – ICM und Student Engagement in der Hochschullehre TI - Lehre in Zeiten von Digitalisierung und Inklusion - Beispiele aus drei Fächern ER - TY - JOUR AU - A. Erofeeva, Maria AU - Klowait, Nils AU - Zababurin, Denis ID - 46103 IS - 3 JF - Sociology of Power KW - General Medicine SN - 2413-144X TI - How to Speak Silently — Rethinking Materiality, Agency, and Communicative Competence in Virtual Reality VL - 34 ER - TY - JOUR AB - The demands on joining technology are constantly increasing due to the consistent lightweight construction and the associated increasing material mix. To meet these requirements, the adaptability of the joining processes must be improved to be able to process different material combinations and to react to challenges caused by deviations in the process chain. One example of a highly adaptable process due to the two-step process sequence is thermomechanical joining with Friction Spun Joint Connectors (FSJCs) that can be individually adapted to the joint. In this paper, the potentials of the adaption in the two-stage joining process with aluminium auxiliary joining elements are investigated. To this end, it is first investigated whether a thermomechanical forming process can be used to achieve a uniform and controlled manufacturing regarding the process variable of the temperature as well as the geometry of the FSJC. Based on the successful proof of the high and good repeatability in the FSJC manufacturing, possibilities, and potentials for the targeted influencing of the process and FSJC geometry are shown, based on an extensive variation of the process input variables (delivery condition and thus mechanical properties of the raw parts as well as the process parameters of rotational speed and feed rate). Here it can be shown that above all, the feed rate of the final forming process has the strongest influence on the process and thus also offers the strongest possibilities for influencing it. AU - Borgert, Thomas AU - Henke, Maximilian AU - Homberg, Werner ID - 46483 IS - 4 JF - Journal of Manufacturing and Materials Processing KW - Industrial and Manufacturing Engineering KW - Mechanical Engineering KW - Mechanics of Materials SN - 2504-4494 TI - Investigations on the Influences of the Thermomechanical Manufacturing of Aluminium Auxiliary Joining Elements VL - 7 ER - TY - CHAP AB - Due to current global challenges regarding energy security as well as climate change the importance of preserving the nature and all available resources is steadily increasing. In order to achieve the energy-saving and climate targets, it is not only necessary to develop new processes and processing possibilities, but also to optimise known process chains with regard to energy and resource efficiency in the area of production technology. Here, the recycling of supposed production waste represents an opportunity to save energy. In addition to the conventional and smelting metallurgical recycling process, extensive research activities have therefore been carried out for alternative solid-state recycling processes. One example is the friction-induced recycling process, which has been used in past studies to demonstrate the energy- and resource-efficient production of semi-finished products from aluminium scrap such as chips. In addition, properties like chemical composition and strength can be adjusted locally and in terms of processing time. This can be used to improve the versatility of further processing steps. AU - Borgert, Thomas AU - Homberg, Werner ID - 46752 SN - 2195-4356 T2 - Lecture Notes in Mechanical Engineering TI - Friction-Induced Recycled Aluminium Semi-finished Products in Thermo-mechanical Joining Technology ER - TY - BOOK AB - „Lerne deinen Körper besser kennen“, „Das Beste für deine Gesundheit“ und „Ihre Transformation beginnt jetzt“ - mit Versprechen wie diesen vermitteln die Produkttexte von Wearables wie Fitnesstracker und Smartwatches ein ganz bestimmtes Bild ihrer vorgesehenen Nutzer*innen und deren Nutzung. Verbunden mit den kleinen, am Handgelenk getragenen Geräten sind Fragen nach Erkenntnisgewinn und Kontrollverlust, Selbstoptimierung und Quantifizierungslogiken, Eigenverantwortung und Fremdsteuerung. Die vorliegende Arbeit widmet sich diesem komplexen Spannungsfeld und verfolgt dabei einen multiperspektivischen Ansatz: im Rahmen einer Dispositivanalyse werden die einzelnen Elemente des Wearable-Dispositivs als eigenständige, empirisch zu untersuchende Analysegegenstände betrachtet, um so das Zusammenwirken und die komplexe Beziehung von Diskursen, Gegenständen, Nutzung, Subjekten und Gesellschaft zu erforschen. Ein besonderes Erkenntnisinteresse liegt dabei auf dem Wissen, was sich über Wearables etabliert hat und sich in den Alltagspraktiken der Nutzer*innen widerspiegelt sowie bei der Frage nach den möglichen Funktionen und Auswirkungen des Wearable-Dispositivs. AU - Schloots, Franziska Margarete ID - 44719 KW - Selbstvermessung KW - Dispositivanalyse KW - Gesundheitsdiskurs KW - Quantifizierungsgesellschaft KW - Wearables KW - Selbstoptimierung SN - 2512-112X TI - Mit dem Leben Schritt halten - Eine Analyse des Wearable-Dispositivs ER - TY - CONF AU - Tchomgue Simeu, Arnold AU - Mahnken, Rolf ID - 46762 T2 - XI International Conference on Adaptive Modeling and Simulation TI - Mesh- and model adaptivity for elasto-plastic mean-field and full-field homogenization based on downwind and upwind approximations ER - TY - JOUR AB - Purpose This study aims to conceptually propose and empirically validate a path perspective on the servitization process of manufacturing firms. It identifies a customer and an outcome path to servitization, sheds light on the pivotal role of digital technology usage for both value-creating paths and explores their financial and relational performance outcomes. Design/methodology/approach The authors use a mixed-method approach, combining a qualitative study with a cross-sectional survey in the USA, the UK and Germany. Findings Manufacturing firms choose between two generic paths to servitization, a customer and an outcome path. Digital technology usage is equally important for both value-creating paths. Progress on the outcome path has a positive effect on firms’ financial performance, whereas the customer path has an indirect effect only, fully mediated by firms’ relational performance. Customer tenure and customer’s open-mindedness are contingency variables in the digital technology usage – servitization path – firm performance framework. Research limitations/implications A path perspective is useful to conceptualize the servitization processes in manufacturing industries. Future research should investigate the sequential choice of servitization paths and explore its drivers and performance outcomes. Practical implications To create and claim superior value for their customers, managers can choose between two servitization paths, leading to differential performance outcomes. While digital technology usage is key to progress on both paths, it is particularly effective for newly acquired customers on the customer path. Suppliers should target their value-creating service offerings at open-minded customer firms to reap their full performance potential. Originality/value Propose and empirically validate a path-perspective on servitization. Understand the pivotal importance of digital technology usage for both servitization paths. AU - Harrmann, Lisa Katharina AU - Eggert, Andreas AU - Böhm, Eva ID - 46642 IS - 3 JF - European Journal of Marketing KW - Marketing SN - 0309-0566 TI - Digital technology usage as a driver of servitization paths in manufacturing industries VL - 57 ER - TY - JOUR AB - Über zwei Drittel der Anfänger*innen im Übergangssystem verfügen maximal über einen Hauptschul-/Mittelschulabschluss. Sie sind damit überrepräsentiert, was sich weniger durch ihre Kompetenzen als mit ihrem sozioökonomischen Status und klassenspezifischen Nachqualifizierungsverhalten erklären lässt. AU - Sommer, Christian ID - 46765 JF - Berufsbildung. Zeitschrift für Theorie-Praxis-Dialog KW - Social inequality KW - Transition system SN - 00059536 TI - Der Hauptschulabschluss als sozial selektiver Hauptzulieferer des Übergangssystems VL - 199 ER - TY - CHAP AU - Süßmann, Johannes ED - Diekmann, Julia ED - Moors, Markus ED - Neuwöhner, Andreas ID - 46234 SN - 978-3-506-79364-5 T2 - Monumenta. Erinnerungsorte zwischen Weser und Lippe. Die Monumenta Paderbornensia des Ferdinand von Fürstenberg TI - »In der Art von Inschriften«. Emblematische Inschriftendichtung als Darstellungsprinzip von Ferdinand von Fürstenbergs Monumenta Paderbornensia (1669 und 1672) VL - 92 ER - TY - JOUR AU - Zdoupas, Philippos AU - Laubenstein, Désirée ID - 45323 IS - 5 JF - European Journal of Special Needs Education (Latest Articles) TI - Perceptions of inclusion in students with diagnosed behavioural, emotional and social difficulties (BESD) displaying internalising and externalising behaviour in inclusive and special education VL - 38 ER - TY - BOOK AU - Zdoupas, Philippos AU - Lara, Kuhlhoff AU - Martin, Grust AU - Jaekel, Anne-Marie AU - Jan, Ehlert ID - 46276 TI - Entwicklungszielgespräche in der Sekundarstufe I - Systemisches Coaching mit Schüler:innen nach dem GROW-Modell ER - TY - JOUR AU - Schubatzky, Thomas AU - Burde, Jan-Philipp AU - Große-Heilmann, Rike AU - Haagen-Schützenhöfer, Claudia AU - Riese, Josef AU - Weiler, David ID - 46760 JF - Computers & Education KW - Education KW - General Computer Science SN - 0360-1315 TI - Predicting the development of digital media PCK/TPACK: The role of PCK, motivation to use digital media, interest in and previous experience with digital media ER - TY - JOUR AU - Wallscheid, Oliver AU - Peitz, Sebastian AU - Stenner, Jan AU - Weber, Daniel AU - Boshoff, Septimus AU - Meyer, Marvin AU - Chidananda, Vikas AU - Schweins, Oliver ID - 46784 IS - 89 JF - Journal of Open Source Software KW - General Earth and Planetary Sciences KW - General Environmental Science SN - 2475-9066 TI - ElectricGrid.jl - A Julia-based modeling and simulationtool for power electronics-driven electric energy grids VL - 8 ER - TY - CHAP AB - SoTL ist eine forschungsbasierte Haltung, die die Hochschullehre verbessern und innovieren will. Das deutschsprachige SoTL-Netzwerk hat fünf Thesen formuliert, die SoTL als Grundhaltung und Motor für Lehrentwicklung betonen. Der Beitrag diskutiert diese Thesen und stellt Aktivitäten des Netzwerks vor, die SoTL an Hochschulen und Universitäten fördern und vernetzen wollen. Dabei wird auch die Rolle der »Teacher-Researcher« hervorgehoben. AU - Arnold, Maik AU - Vöing, Nerea AU - Reisas, Sabine ID - 46787 SN - 2749-7623 T2 - Hochschulbildung: Lehre und Forschung TI - Scholarship of Teaching and Learning (SoTL) als Motor für eine inter- und transdisziplinäre Hochschuldidaktik ER - TY - JOUR AB - For improved and rational design of catalysts, in-depth knowledge of their formation and structural evolution during synthesis is a key parameter. Thus, preparation of a Ni methanation catalyst derived from... AU - Prinz, Nils AU - Strübbe, Sven AU - Bauer, Matthias AU - Zobel, Mirijam ID - 45480 JF - New Journal of Chemistry KW - Materials Chemistry KW - General Chemistry KW - Catalysis SN - 1144-0546 TI - Structural transitions during Ni nanoparticle formation by decomposition of a Ni-containing metal-organic framework using in-situ total scattering ER - TY - CHAP AU - Böker, Ines AU - Willeke, Stephanie ED - Hofmann, Michael ED - Thielking, Sigrid ID - 46795 T2 - Neue Perspektiven einer kulturwissenschaftlich orientierten Literaturdidaktik TI - "Nicht das erste Mal, dass ich die Orientierung verloren habe" – Transkulturalität und Deutschdidaktik im Dialog ER - TY - CHAP AU - Böker, Ines ED - Böker, Ines ED - Schulte Eickholt, Swen ID - 46797 T2 - Interkulturelle Konstellationen in Literaturwissenschaft und Literaturdidaktik TI - Kurze Bestandsaufnahme zum postmigrantischen Theater und postmigrantischer Theaterwissenschaft ER - TY - BOOK ED - Böker, Ines ED - Schulte Eickholt, Swen ID - 46798 TI - Interkulturelle Konstellationen in Literaturwissenschaft und Literaturdidaktik ER - TY - GEN AB - In common law systems, firms’ litigation risk depends both on written laws and how courts interpret these laws. Using 321 U.S. circuit court rulings, we introduce a novel measure capturing courts’ attitudes towards defendants in securities lawsuits. Our results confirm that financial misreporting firms in more defendant-friendly circuits face fewer lawsuits. Consistent with lower expected litigation costs, firms in these circuits face less negative market reactions when misreporting is revealed, invest less in preventing misreporting, and are more likely to engage in aggressive misreporting. We conclude that defendant-friendly precedents reduce firms’ legal liability and worsen their financial reporting quality. AU - Franke, Benedikt AU - Huang, Allen AU - Li, Reeyarn AU - Wang, Hui ID - 46804 TI - Securities Law Precedents, Legal Liability, and Financial Reporting Quality ER - TY - CHAP AU - Rossel, M. AU - Meschut, G. ID - 46809 SN - 2195-4356 T2 - Lecture Notes in Mechanical Engineering TI - Modeling and Parameterization for a 3D Simulation of Clinching with an Extensible Die ER - TY - JOUR AB - AbstractObjectiveConcerns about short‐ and long‐term consequences of repetitive heading contributed to heading restrictions in youth football in some countries. This prospective longitudinal cohort study aims to describe heading exposure in children's and youth football over two seasons using standardized video analysis.MethodsAll matches and training sessions of a male Under‐11 (n = 29), Under‐15 (n = 28), Under‐19 (n = 38), and female Under‐17 (n = 39) team were videotaped during the seasons 2019–2020 and 2020–2021. Heading frequencies and characteristics were analyzed. Individual heading exposure is presented as average incidence rates (IR) per 1000 match/training hours.ResultsIn 275 matches and 673 training sessions, 22 921 headers were observed. Heading IR per player in matches was 1256 (Under‐11 m), 1608 (Under‐15 m), 1050 (Under‐17 f), and 1966 (Under‐19 m). In training sessions, IR per player was 739 (Under‐11 m), 2206 (Under‐15 m), 1661 (Under‐17 f), and 1419 (Under‐19 m). Five Under‐15 males headed the ball five to eight times per training on average. Most headers were performed without heading duels. Flight distance was predominantly 5–20 m (54%) in matches and <5 m (65%) in training. While head impact location most frequently was at frontal areas, one‐third of all headers in Under‐11 in matches hit temporal, parietal, and occipital parts of the head.ConclusionHeading incidence was low in the youngest age group, whereas (predominantly five) Under‐15 males showed very high heading exposures in training. In assessment and regulation of heading burden, training sessions and individual heading behavior should specifically be addressed. Recommendations for heading the ball in practice should account for individual and age‐related differences. AU - Reeschke, Rebecca AU - Haase, Franziska Katharina AU - Dautzenberg, Lena AU - Krutsch, Werner AU - Reinsberger, Claus ID - 46818 IS - 9 JF - Scandinavian Journal of Medicine & Science in Sports KW - Physical Therapy KW - Sports Therapy and Rehabilitation KW - Orthopedics and Sports Medicine SN - 0905-7188 TI - Training matters: Heading incidence and characteristics in children's and youth football (soccer) players VL - 33 ER - TY - BOOK AU - Rossel, Moritz Sebastian AU - Meschut, Gerson ID - 46812 TI - Methodenentwicklung zur verbesserten Prognosegüte beim Clinchen mit beweglicher Matrize in der numerischen Fügeprozesssimulation VL - 598 ER - TY - JOUR AU - Höper, Lukas AU - Schulte, Carsten ID - 46186 IS - 4 JF - MNU journal SN - 0025-5866 TI - Paradigmenwechsel vom klassischen zum datengetriebenen Problemlösen im Informatikunterricht VL - 76 ER - TY - JOUR AU - Pfister, Daniel AU - Jackson, Robin C AU - Güldenpenning, Iris AU - Williams, A Mark ID - 46736 JF - Human Movement Science TI - Timing a fake punch: Inhibitory effects in a boxing-specific spatial attention task VL - 89 ER - TY - CONF AU - Blömer, Johannes AU - Bobolz, Jan AU - Bröcher, Henrik ID - 35014 TI - On the impossibility of surviving (iterated) deletion of weakly dominated strategies in rational MPC ER - TY - CONF AU - Blömer, Johannes AU - Bobolz, Jan AU - Porzenheim, Laurens Alexander ID - 43458 TI - A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices ER - TY - CHAP AU - Schroeter-Wittke, Harald AU - Junkermann, Ilse ID - 46856 T2 - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023 TI - Stern über Bethlehem (EG.E 1) ER - TY - CHAP AU - Schroeter-Wittke, Harald ID - 46857 T2 - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023 TI - Wir haben Gottes Spuren festgestellt (EG.E 20) ER - TY - JOUR AB - In this work, the influence of the filler–matrix adhesion on the tensile properties of laser-sintered parts built with Polyamide 613 filled with glass beads was investigated. For this purpose, dry blends of glass beads with and without organosilane coupling agents and polyamide powder were prepared and processed into tensile specimens on an EOS P396 laser sintering system. The samples were tested both in the dry state and after an accelerated conditioning in a climate chamber. Furthermore, finite element method (FEM) simulations were performed to model the extreme cases of optimum adhesion and no adhesion. By correlating the tensile tests with the simulation results and by analyzing the fracture surfaces, it was shown that the filler–matrix adhesion is sufficient in the dry state but is strongly degraded by conditioning. Even the presence of various organosilane thin films could not prevent a strong deterioration of the filler–matrix adhesion and the associated deterioration of the mechanical properties. Since a comparison with an injection-molded sample of the same polymer filler combination shows identical behavior after conditioning, it is assumed that this problem is not limited to additively manufactured parts. AU - Kletetzka, Ivo AU - Kosanke, Maren AU - Meinderink, Dennis AU - Neßlinger, Vanessa AU - Grundmeier, Guido AU - Schmid, Hans-Joachim ID - 46815 JF - Progress in Additive Manufacturing KW - Industrial and Manufacturing Engineering SN - 2363-9512 TI - Influence of the filler–matrix adhesion and the effects of conditioning on tensile properties of laser-sintered parts built with polyamide–glass bead dry blends ER - TY - GEN AB - Abstract In this work, the influence of the filler matrix adhesion on the tensile properties of laser-sintered parts built with Polyamide 613 filled with glass beads was investigated. For this purpose, dry blends of glass beads with and without organosilane coupling agents and polyamide powder were prepared and processed into tensile specimens on an EOS P396. The samples were tested both in the dry state and after an accelerated conditioning in a climate chamber. Furthermore, FEM simulations were performed to model the limiting cases of optimum adhesion and no adhesion. By correlating the tensile tests with the simulation results and by analyzing the fracture surfaces, it was shown that the filler matrix adhesion is sufficient in the dry state but is strongly degraded by conditioning. Even the presence of various organosilane thin films could not prevent a strong deterioration of the filler-matrix adhesion and the associated deterioration of the mechanical properties. Since a comparison with an injection molded sample of the same polymer filler combination shows identical behavior after conditioning, it is assumed that this problem is not limited to additively manufactured parts. AU - Kletetzka, Ivo AU - Kosanke, Maren AU - Meinderink, Dennis AU - Neßlinger, Vanessa AU - Grundmeier, Guido AU - Schmid, Hans-Joachim ID - 43049 TI - Influence of the filler matrix adhesion and the effects of conditioning on tensile properties of laser sintered parts built with polyamide glass bead dry blends ER - TY - GEN AU - Kletetzka, Ivo ID - 45783 TI - Tensile Testing for Polymer AM - Best Pratice at the DMRC ER - TY - JOUR AB - In the laser sintering technology, the semi-crystalline polymer material is exposed to elevated temperatures during processing, which leads to serious material ageing for most materials. This has already been investigated intensively by various authors. However, the ageing of the material at ambient temperatures during shelf life has not been the focus so far. The need to analyse the shelf life can be derived from an ecological and economic point of view. This work is focusing on the shelf life of PA2200 (PA12). To reduce the potential influences of powder production fluctuations, two different powder batches stored for 5.5 years and 6.5 years are investigated and compared to a reference powder produced 0.5 years before these investigations. Multiple powder analyses and part characterisations have been performed. A significant yellowing and molecular chain length reduction can be derived from the measurement results. Whereas the influence on mechanical part performance was minor, the parts built with the stored powders are more yellowish. As it is most likely that this is due to the consumption of polyamide stabilisers, it can be assumed that these parts will be subject to significantly faster ageing. Therefore, it is still not recommended to use the stored powders for critical parts or light intense and humid environments. AU - Klippstein, Sven Helge AU - Kletetzka, Ivo AU - Sural, Ilknur AU - Schmid, Hans-Joachim ID - 43046 JF - The International Journal of Advanced Manufacturing Technology KW - Selective laser sintering KW - Shelf life KW - Polyamide 12 KW - powder KW - PA2200 KW - material ageing TI - Influence of a prolonged shelf time on PA12 laser sintering powder and resulting part properties ER - TY - GEN AU - Sajadi, Said ID - 46861 TI - Charakterisierung und Bewertung von flammgeschützten PA12 Pulvermischungen hinsichtlich der Verarbeitbarkeit im Lasersinter-Prozess ER - TY - CONF AU - Troschitz, Juliane AU - Vorderbrüggen, Julian Heinrich Josef AU - Gude, Maik AU - Meschut, Gerson ID - 46866 T2 - Proceedings of the 23rd International Conference on Composite Materials (ICCM23) TI - Clinching and resistance spot welding of thermoplastic composites with metals using inserts as joining interfaces ER - TY - CHAP AU - Dieter, Peter ID - 46867 SN - 0302-9743 T2 - Lecture Notes in Computer Science TI - A Regret Policy for the Dynamic Vehicle Routing Problem with Time Windows ER - TY - CHAP AU - Menge, Dennis AU - Milaege, Dennis AU - Hoyer, Kay-Peter AU - Schmid, Hans-Joachim AU - Schaper, Mirko ED - Horwath, Illona ED - Schweizer, Swetlana ID - 46870 SN - 2703-1543 T2 - Climate Protection, Resource Efficiency, and Sustainable Engineering TI - Case Study IV: Individualized Medical Technology using Additive Manufacturing ER - TY - CONF AU - Hansmeier, Philipp ID - 46892 T2 - Proceedings of the 18th International Conference on Wirtschaftsinformatik TI - Exploring Platform Types and Related Concepts in Service Research – A Systematic Scoping Literature Review ER - TY - BOOK ED - Alpermann, Ilsabe ED - Besser, Beate ED - Evang, Martin ED - Schroeter-Wittke, Harald ID - 46854 TI - Ich lobe meinen Gott, der aus der Tiefe mich holt. Hymnologische Kommentare zu den Liedern im Ergänzungsheft zum Evangelischen Gesangbuch. Jan Janssen zum 60. Geburtstag. HEG 3/Ergänzungsheft, Göttingen 2023 ER - TY - CHAP AU - Schroeter-Wittke, Harald AU - Kirsner, Inge ID - 46896 T2 - Predigtstudien VI/1 TI - XXmas: Macht gebären statt Macht gebaren. 1. Weihnachtstag (Christfest I) 2Mose 2,1-10 ER -