@inproceedings{46862, abstract = {{The high flammability of components manufactured by laser sintering (LS) using standard polyamide 12 (PA12) powder still severely restricts their use in industries such as electronics, aviation, and transportation. A key factor for the further establishment of LS is the expansion of the material portfolio with, for example, refreshable and halogen-free flame-retardant (FR) powder materials. Accordingly, various halogen-free FRs are investigated in this work and evaluated with respect to their use in LS. First, their decomposition behavior and mode of action are examined. Subsequently, the additives are dry blended with PA12 to investigate properties relevant for LS, such as particle morphology, thermal behavior and melt viscosity. Afterwards, test specimens for UL94 vertical flame-retardancy tests are produced by processing the dry blends on an EOS P3 LS system. Finally, the process stability of the process-aged powder blends is investigated by again examining the thermal behavior and melt viscosity.}}, author = {{Neitzel, Fabian and Kletetzka, Ivo and Schmid, Hans-Joachim}}, booktitle = {{Proceedings of the 34th Annual International Solid Freeform Fabrication Symposium}}, editor = {{Beaman, Joseph}}, keywords = {{Additive Manufacturing, Laser Sintering, Flame Retardant, Polyamide 12}}, location = {{Austin}}, title = {{{Halogen-Free Flame Retardant Powder Materials for Laser Sintering: Evaluation and Process Stability Analysis}}}, doi = {{https://doi.org/10.26153/tsw/50926}}, year = {{2023}}, } @inbook{53405, abstract = {{Das Verhältnis zwischen Wissenschaft und Praxis wurde in unterschiedlichen Forschungsansätzen im- mer wieder wissenschaftlich betrachtet. Dennoch ist es notwendig, sich im Rahmen der wissenschafts- theoretischen Konzeption von Design-Based Research (DBR) weiter damit auseinanderzusetzen, denn Interaktion zwischen Wissenschaft und Bildungspraxis ist ein zentrales Merkmal von DBR. Dieser Beitrag befasst sich mit der Frage, wie sich diese Interaktion je nach zugrunde liegendem DBR-Verständnis me- thodologisch fassen lässt. Die Interaktion wird als ein wesentlicher Bestandteil des Erkenntnisprozesses in DBR aufgefasst. Daher wird neben der methodischen Ausgestaltung von Interaktionsprozessen auch methodologisch reflektiert, was die Wissenschaft-Praxis-Interaktion für die Erkenntnis an sich bedeutet.}}, author = {{Jenert, Tobias}}, booktitle = {{Wissenschaft trifft Praxis – Designbasierte Forschung in der beruflichen Bildung}}, editor = {{Kremer, H.-Hugo and Ertl, Hubert and Sloane, Peter F. E.}}, pages = {{11--24}}, publisher = {{Bundesinstitut für Berufsbildung.}}, title = {{{Design-Based Research als Erforschung und Gestaltung von Interaktionsprozessen zwischen Wissenschaft und Bildungspraxis}}}, year = {{2023}}, } @inproceedings{49785, abstract = {{Reputation is indispensable for online business since it supports customers in their buying decisions and allows sellers to justify premium prices. While IS research has investigated reputation systems mainly as review systems on online platforms for business-to-consumer (B2C) transactions, no proper solutions have been developed for business-to-business (B2B) transactions yet. We use blockchain technology to propose a new class of reputation systems that apply ratings as voluntary bonus payments: Before a transaction is performed, customers commit to pay a bonus that is granted if a service provider has performed a service properly. As opposed to rival reputation systems that build on cumulated ratings or reviews, our system enables monetized reputation mechanisms that are inextricably linked with online transactions. We expect this system class to provide more trustworthy ratings, which might reduce agency costs and serve quality providers to establish a reputation towards new customers, building on second-order trust.}}, author = {{Hemmrich, Simon}}, booktitle = {{Proceedings of 31st European Conference on Information Systems (ECIS 2023)}}, keywords = {{Trust, Risk, Reputation System, Blockchain Technology, Business Reputation System.}}, location = {{Kristiansand}}, title = {{{Business Reputation Systems based on Blockchain Technology—A Risky Advance}}}, year = {{2023}}, } @article{49607, abstract = {{In this work, we utilize thin dielectric meta-atoms placed on a silver substrate to efficiently enhance and manipulate the third-harmonic generation. We theoretically and experimentally reveal that when the structural symmetry of the meta-atom is incompatible with the lattice symmetry of an array, some generalized nonlinear geometric phases appear, which offers new possibilities for harmonic generation control beyond the accessible symmetries governed by the selection rule. The underlying mechanism is attributed to the modified rotation of the effective principal axis of a dense meta-atom array, where the strong coupling among the units gives rise to a generalized linear geometric phase modulation of the pump light. Therefore, nonlinear geometric phases carried by third-harmonic emissions are the natural result of the wave-mixing process among the modes excited at the fundamental frequency. This mechanism further points out a new strategy to predict the nonlinear geometric phases delivered by the nanostructures according to their linear responses. Our design is simple and efficient and offers alternatives for the nonlinear meta-devices that are capable of flexible photon generation and manipulation.}}, author = {{Liu, Bingyi and Geromel, René and Su, Zhaoxian and Guo, Kai and Wang, Yongtian and Guo, Zhongyi and Huang, Lingling and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials}}, number = {{12}}, pages = {{4357--4366}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design}}}, doi = {{10.1021/acsphotonics.3c01163}}, volume = {{10}}, year = {{2023}}, } @inproceedings{46188, author = {{Faj, Jennifer and Kenter, Tobias and Faghih-Naini, Sara and Plessl, Christian and Aizinger, Vadym}}, booktitle = {{Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)}}, publisher = {{ACM}}, title = {{{Scalable Multi-FPGA Design of a Discontinuous Galerkin Shallow-Water Model on Unstructured Meshes}}}, doi = {{10.1145/3592979.3593407}}, year = {{2023}}, } @inproceedings{46189, author = {{Prouveur, Charles and Haefele, Matthieu and Kenter, Tobias and Voss, Nils}}, booktitle = {{Proceedings of the Platform for Advanced Scientific Computing Conference (PASC)}}, publisher = {{ACM}}, title = {{{FPGA Acceleration for HPC Supercapacitor Simulations}}}, doi = {{10.1145/3592979.3593419}}, year = {{2023}}, } @inbook{49684, author = {{Rezat, Sebastian and Geiger, Vince}}, booktitle = {{Handbook of Digital Resources in Mathematics Education}}, editor = {{Pepin, Birgit and Gueudet, Ghislaine and Choppin, Jeffrey}}, isbn = {{9783030950606}}, issn = {{2197-1951}}, publisher = {{Springer International Publishing}}, title = {{{The role of digital technologies in transforming student learning landscapes}}}, doi = {{10.1007/978-3-030-95060-6_21-1}}, year = {{2023}}, } @article{45786, abstract = {{Intending to counteract Klein’s second discontinuity in teacher education, we explored and applied the innovation of “interface ePortfolio” in the context of a geometry course for preservice teachers (PSTs). The tool offers the possibility of implementing the design principle of profession orientation. In the article, we theoretically clarify what we understand by this principle and locate our innovative concept against this theoretical background. We empirically investigate the extent to which counteraction against the second discontinuity is successful by analyzing reflection texts created in the interface ePortfolio, focusing on PSTs’ perspectives. Our qualitative content analysis shows that most of them perceive the innovation as helpful in the intended sense and indicates that the course concept, in general, and the interface ePortfolio, in particular, have helped establish relevant links between the course content and their later work as teachers.}}, author = {{Hoffmann, Max and Biehler, Rolf}}, issn = {{1863-9690}}, journal = {{ZDM – Mathematics Education}}, keywords = {{General Mathematics, Education}}, publisher = {{Springer}}, title = {{{Implementing profession orientation as a design principle for overcoming Klein’s second discontinuity – preservice teacher’s perspectives on interface activities in the context of a geometry course}}}, doi = {{10.1007/s11858-023-01505-3}}, year = {{2023}}, } @article{46478, abstract = {{High streets across Europe continue to lose consumers to online retail, leading to business closures and the decline of city centres, impairing cities’ overall liveability. To counter this vicious cycle, our study presents smartmarket2, the first instantiation of a digital actor engagement platform designed specifically for high streets. smartmarket2 enables hybrid online-offline customer journeys by connecting consumers to stores and other high street service providers. In an action design research (ADR) project, we design, implement and evaluate smartmarket2, involving 150 high street operators and 2,300 citizens in three cycles of building, intervention and evaluation. We derive four design principles that contribute prescriptive knowledge on the design of digital actor engagement platforms. Our results reveal that such a platform is able to increase engagement, but that it is subject to actors’ engagement dispositions.}}, author = {{Bartelheimer, Christian and zur Heiden, Philipp and Berendes, Carsten Ingo and Beverungen, Daniel}}, issn = {{0960-085X}}, journal = {{European Journal of Information Systems}}, keywords = {{Digital platform, action design research, design principles, actor engagement, engagement platform, location-based advertising}}, pages = {{1--34}}, publisher = {{Taylor & Francis}}, title = {{{Designing digital actor engagement platforms for local high streets: an action design research study}}}, doi = {{10.1080/0960085x.2023.2242847}}, year = {{2023}}, } @inproceedings{49882, abstract = {{Online discussion moderators must make ad-hoc decisions about whether the contributions of discussion participants are appropriate or should be removed to maintain civility. Existing research on offensive language and the resulting tools cover only one aspect among many involved in such decisions. The question of what is considered appropriate in a controversial discussion has not yet been systematically addressed. In this paper, we operationalize appropriate language in argumentation for the first time. In particular, we model appropriateness through the absence of flaws, grounded in research on argument quality assessment, especially in aspects from rhetoric. From these, we derive a new taxonomy of 14 dimensions that determine inappropriate language in online discussions. Building on three argument quality corpora, we then create a corpus of 2191 arguments annotated for the 14 dimensions. Empirical analyses support that the taxonomy covers the concept of appropriateness comprehensively, showing several plausible correlations with argument quality dimensions. Moreover, results of baseline approaches to assessing appropriateness suggest that all dimensions can be modeled computationally on the corpus.}}, author = {{Ziegenbein, Timon and Syed, Shahbaz and Lange, Felix and Potthast, Martin and Wachsmuth, Henning}}, booktitle = {{Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics}}, location = {{Toronto}}, pages = {{4344--4363}}, title = {{{Modeling Appropriate Language in Argumentation}}}, doi = {{https://doi.org/10.18653/v1/2023.acl-long.238}}, year = {{2023}}, } @article{42679, abstract = {{The Saharan desert ant Cataglyphis bombycina is densely covered with shiny silver setae (hair-like structures). Their appearance was explained by geometric optics and total internal reflection. The setae also increase the emissivity of the ant, as they form an effective medium. This work provides additional data on microstructural details of the setae that are used to simulate the scattering of an individual seta to explain their influence on the optical properties. This is achieved by characterization of their structure using light microscopy and scanning/transmission electron microscopy. How the microstructural features influence scattering is investigated wave-optically within the limits of finite-difference time-domain simulations from the ultraviolet to the mid-infrared spectral range to elucidate the optical effects beyond ray optics and effective medium theory. The results show that Mie scattering plays an important role in protecting the ant from solar radiation and could be relevant for its thermal tolerance.}}, author = {{Schwind, Bertram and Wu, Xia and Tiemann, Michael and Fabritius, Helge-Otto}}, issn = {{0740-3224}}, journal = {{Journal of the Optical Society of America B}}, keywords = {{Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics}}, number = {{3}}, pages = {{B49 -- B58}}, publisher = {{Optica Publishing Group}}, title = {{{Broadband Mie scattering effects by structural features of setae from the Saharan silver ant Cataglyphis bombycina}}}, doi = {{10.1364/josab.474899}}, volume = {{40}}, year = {{2023}}, } @inproceedings{46988, abstract = {{Extremwettersituationen sind durch die Kombination von globalen und lokalen Wirkzusammenhän-gen gekennzeichnet. In der Gefahrenanalyse und -reaktion ist deshalb der Umgang mit extremen Daten erforderlich, die von heterogenen Datenquellen bezogen und mittels unterschiedlicher Ver-fahren bis hin zum maschinellen Lernen ausgewertet werden. Die Visualisierung dieser zwangsläufig unsicherheitsbehafteten Daten stellt eine Herausforderung dar. Diese wirkt umso bedeutsamer, je weniger Fachexpertise in Bereichen wie Meteorologie, Geologie oder Sensortechnik in einer Füh-rungs- oder Leitstelle eingebunden werden kann. Das Management kritischer Situationen in Echtzeit bei extremen und komplexen Daten muss daher auf einer Bewertung der Informationsqualität von extremen Daten beruhen. Diese Bewertung ist abhängig vom Anwendungskontext in unterschiedli-chen Führungs- und Assistenzstellen sowie der verfügbaren Infrastruktur mit Geräten zur Visualisie-rung, Schnittstellen von Wetterdiensten, Sensorsysteme und Rettungsrobotik. Im Beitrag wird der Ansatz des EU-Projekts CREXDATA in Bezug auf mögliche pluviale Hochwassersituationen in Inns-bruck vorgestellt. Grundlage bildet die Kategorisierung von extremen Daten, die Schnittstellen zu Datenquellen mit globalem und lokalem Bezug sowie Anwendungsfälle für die Visualisierung von Informationen. Es werden somit Grundlagen präsentiert, die in allen Formen von geobasierten Lage- und Führungsinformationssystemen zum Einsatz kommen können.}}, author = {{Pottebaum, Jens and Rechberger, Christina and Hieb, Michael and Gräßler, Iris and Resch, Christian}}, booktitle = {{Tagungsband der Fachtagung Katastrophenforschung 2023}}, isbn = {{978-3-900397-11-1}}, location = {{Leoben}}, pages = {{26--29}}, title = {{{Extremwettersituationen in alpinen Gebieten: Management kritischer Situationen in Echtzeit bei extremen und komplexen Daten}}}, year = {{2023}}, } @article{54558, abstract = {{(Smart) service systems have inspired the emergence of a new research area that builds on smart, connected products and networked business models with smart services and brings together various social-science and technological disciplines. However, the factors that lead to successful service systems engineering initiatives have remained under-explored, despite their increasing significance in industry. In particular, the role of standardization is unclear, even though it seems to be central to making smart products interoperable and to establishing innovative (smart) service systems. In an exploratory case study of the standardization initiative omlox, we set out to identify and investigate empirically the effects that standardization can have on engineering (smart) service systems. Our focus is to determine how standardization can assist a company in accessing external resources and capabilities for recombinant service innovation. The results reveal that compliance with a standard enables companies to tap into compatible solutions, data, and knowledge from external stakeholders and that participation in standardization initiatives can be a platform for identifying potential collaboration partners. We conclude that standardization plays a major role in all phases of service systems engineering, from analysis to design and implementation.}}, author = {{Marx, Emanuel and Daudrich, Roman and Pauli, Tobias and Matzner, Martin and Beverungen, Daniel}}, journal = {{Journal of Service Management Research}}, number = {{4}}, pages = {{213--231}}, publisher = {{Nomos}}, title = {{{Standardization as a Catalyst for Extending Ressouces and Capabilities in Service Systems Engineering: Findings from the omlox case}}}, doi = {{10.5771/2511-8676-2023-4-213}}, volume = {{7}}, year = {{2023}}, } @article{48589, author = {{Fuchs, Christian}}, journal = {{Critical Sociology}}, number = {{4-5}}, pages = {{727--745}}, title = {{{Ibn Khaldûn and the Political Economy of Communication in the Age of Digital Capitalism}}}, doi = {{10.1177/08969205231206488 }}, volume = {{50}}, year = {{2023}}, } @article{48590, author = {{Fuchs, Christian}}, journal = {{Critical Sociology}}, number = {{4-5}}, pages = {{757--765}}, title = {{{Ibn Khaldûn and the Political Economy of Communication: A Reply to Graham Murdock}}}, doi = {{10.1177/08969205231201382}}, volume = {{50}}, year = {{2023}}, } @inbook{47548, author = {{Fuchs, Christian}}, booktitle = {{Eigentum, Medien, Öffentlichkeit: Verhandlungen des Netzwerks Kritische Kommunikationswissenschaft}}, editor = {{Güney, Selma and Hille, Lina and Pfeiffer, Juliane and Porak, Laura and Theine, Hendrik}}, pages = {{215--236}}, publisher = {{Westend Verlag}}, title = {{{Zur Kritik der Politischen Ökonomie des Digitalen Kapitalismus: Die Aktualität von Manfred Knoches Beitrag zur Kritik der Politischen Ökonomie der Medien und der Kommunikation}}}, doi = {{https://doi.org/10.53291/BWUB5365}}, year = {{2023}}, } @article{46448, abstract = {{We live in times of deep crisis. General crises of society often are accompanied by ideological struggles. Given this context, it is important that social theory reinvigorates the analysis of ideology. For doing so, it makes sense to engage with classical theories of ideology. This paper contributes to this task. It asks: How are the economic and the non-economic related? What is ideology? This article deals with the base/superstructure problem and the problem of ideology via an engagement with selected aspects of Stuart Hall’s, Georg Lukács’s and Raymond Williams’s works. The commonality of Hall’s, Lukács’s and Williams’s thoughts that makes a joint engagement with their works feasible is that they all three dealt with aspects of culture from a critical theory perspective and are in one way or another representatives of Cultural Marxism. While Lukács’s works and Cultural Studies are often presented as conflicting approaches, this paper shows that concerning the question of how the economic and the non-economic are related and how we can think of ideology, the approaches of Lukács, Williams, and Hall complement each other, which allows critical theories of culture to draw on all three approaches and to combine elements from them in a synergistic manner. There are parallels between Williams’, Hall’s, and Lukács’s solutions to the base/superstructure problem. Williams argues that the economic exerts pressures on and sets limits to the non-economic. Hall writes that the economic determines the non-economic in the first instance. Lukács argues that the economic circumscribes subjectivity and the non-economic.}}, author = {{Fuchs, Christian}}, journal = {{The Communication Review.}}, keywords = {{base and superstructure, culture, economy and culture, Georg Lukács, ideology, Raymond Williams, Stuart Hall}}, title = {{{The Problems of Base/Superstructure and Ideology in the Works of Stuart Hall, Georg Lukács, and Raymond Williams}}}, doi = {{10.1080/10714421.2023.2242068 }}, year = {{2023}}, } @article{46749, author = {{Fuchs, Christian}}, journal = {{Theory and Society}}, number = {{6}}, pages = {{995--1029}}, title = {{{A Marxist-Humanist Perspective on Stuart Hall's Communication Theory}}}, doi = {{10.1007/s11186-023-09524-5}}, volume = {{52}}, year = {{2023}}, } @article{48543, abstract = {{Explanation has been identified as an important capability for AI-based systems, but research on systematic strategies for achieving understanding in interaction with such systems is still sparse. Negation is a linguistic strategy that is often used in explanations. It creates a contrast space between the affirmed and the negated item that enriches explaining processes with additional contextual information. While negation in human speech has been shown to lead to higher processing costs and worse task performance in terms of recall or action execution when used in isolation, it can decrease processing costs when used in context. So far, it has not been considered as a guiding strategy for explanations in human-robot interaction. We conducted an empirical study to investigate the use of negation as a guiding strategy in explanatory human-robot dialogue, in which a virtual robot explains tasks and possible actions to a human explainee to solve them in terms of gestures on a touchscreen. Our results show that negation vs. affirmation 1) increases processing costs measured as reaction time and 2) increases several aspects of task performance. While there was no significant effect of negation on the number of initially correctly executed gestures, we found a significantly lower number of attempts—measured as breaks in the finger movement data before the correct gesture was carried out—when being instructed through a negation. We further found that the gestures significantly resembled the presented prototype gesture more following an instruction with a negation as opposed to an affirmation. Also, the participants rated the benefit of contrastive vs. affirmative explanations significantly higher. Repeating the instructions decreased the effects of negation, yielding similar processing costs and task performance measures for negation and affirmation after several iterations. We discuss our results with respect to possible effects of negation on linguistic processing of explanations and limitations of our study.}}, author = {{Groß, A. and Singh, Amit and Banh, Ngoc Chi and Richter, B. and Scharlau, Ingrid and Rohlfing, Katharina J. and Wrede, B.}}, journal = {{Frontiers in Robotics and AI}}, keywords = {{HRI, XAI, negation, understanding, explaining, touch interaction, gesture}}, title = {{{Scaffolding the human partner by contrastive guidance in an explanatory human-robot dialogue}}}, doi = {{10.3389/frobt.2023.1236184}}, volume = {{10}}, year = {{2023}}, } @article{50603, abstract = {{Mathematical models and computer simulations play a crucial role in the context of the COVID-19 crisis for knowledge about the possible course of the pandemic and for appropriate policy decisions. The paper presents results from an ethnographic study of a government-funded R & D project dealing with agent-based modeling and simulation (ABMS) in the context of pandemic management. Based on the assumption that the use of computer simulations in pandemic management is not only a means to an end for political or epidemiological goals but also plays a significant role in determining which goals and strategies appear politically legitimate, the paper reconstructs how insights into the pandemic are generated in ABMS and specifically in the researched project and made accessible for decision-making.}}, author = {{Hälterlein, Jens}}, issn = {{2567-8833}}, journal = {{TATuP - Zeitschrift für Technikfolgenabschätzung in Theorie und Praxis}}, keywords = {{General Medicine}}, number = {{1}}, pages = {{30--35}}, publisher = {{Oekom Publishers GmbH}}, title = {{{Agentenbasierte Modellierung und Simulation im Pandemiemanagement}}}, doi = {{10.14512/tatup.32.1.30}}, volume = {{32}}, year = {{2023}}, }