@article{51165, abstract = {{Ernährungsbildung ist derzeit nur unzureichend in der Primarstufe verankert, sie sollte es jedoch sein, damit Kinder Kompetenzen für die Alltagsbewältigung im Handlungsfeld Ernährung und somit zur Teilhabe an der Gesellschaft anbahnen können. Essen und Ernährung bieten sich als perspektivenvernetzender Themenbereich für den Sachunterricht an.}}, author = {{Bigga, Regine}}, issn = {{2193-8806}}, journal = {{HiBiFo – Haushalt in Bildung & Forschung}}, keywords = {{Ernährungsbildung, Sachunterricht, Curriculumentwicklung, Esskultur}}, number = {{2}}, pages = {{54--67}}, publisher = {{Verlag Barbara Budrich GmbH}}, title = {{{Essen und Ernährung im Sachunterricht}}}, doi = {{10.3224/hibifo.v12i2.05}}, volume = {{12}}, year = {{2023}}, } @article{46023, abstract = {{This article presents the potential-dependent adsorption of two proteins, bovine serum albumin (BSA) and lysozyme (LYZ), on Ti6Al4V alloy at pH 7.4 and 37 °C. The adsorption process was studied on an electropolished alloy under cathodic and anodic overpotentials, compared to the open circuit potential (OCP). To analyze the adsorption process, various complementary interface analytical techniques were employed, including PM-IRRAS (polarization-modulation infrared reflection-absorption spectroscopy), AFM (atomic force microscopy), XPS (X-ray photoelectron spectroscopy), and E-QCM (electrochemical quartz crystal microbalance) measurements. The polarization experiments were conducted within a potential range where charging of the electric double layer dominates, and Faradaic currents can be disregarded. The findings highlight the significant influence of the interfacial charge distribution on the adsorption of BSA and LYZ onto the alloy surface. Furthermore, electrochemical analysis of the protein layers formed under applied overpotentials demonstrated improved corrosion protection properties. These studies provide valuable insights into protein adsorption on titanium alloys under physiological conditions, characterized by varying potentials of the passive alloy.}}, author = {{Duderija, Belma and González-Orive, Alejandro and Ebbert, Christoph and Neßlinger, Vanessa and Keller, Adrian and Grundmeier, Guido}}, issn = {{1420-3049}}, journal = {{Molecules}}, keywords = {{Chemistry (miscellaneous), Analytical Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Molecular Medicine, Drug Discovery, Pharmaceutical Science}}, number = {{13}}, publisher = {{MDPI AG}}, title = {{{Electrode Potential-Dependent Studies of Protein Adsorption on Ti6Al4V Alloy}}}, doi = {{10.3390/molecules28135109}}, volume = {{28}}, year = {{2023}}, } @article{51167, author = {{Duderija, B. and Sahin, F. and Meinderink, D. and Calderón-Gómez, J.C. and Schmidt, H.C. and Homberg, W. and Grundmeier, G. and González-Orive, A.}}, issn = {{2666-3309}}, journal = {{Journal of Advanced Joining Processes}}, keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}}, publisher = {{Elsevier BV}}, title = {{{Electropolymerization of acrylic acid on steel for enhanced joining by plastic deformation}}}, doi = {{10.1016/j.jajp.2023.100181}}, volume = {{9}}, year = {{2023}}, } @inbook{43136, author = {{Meyer-Hamme, Johannes and Fastlabend-Vargas, Daniel}}, booktitle = {{Geschichtsdidaktisch intervenieren}}, editor = {{Waldis, Monika and Nitsche, Martin }}, pages = {{279--303 }}, title = {{{„Fotos, die jede*r kennt?“ Eine empirische Untersuchung historischer Kenntnisforschung anhand von Bildikonen bei Studierenden des Lehramts Geschichte}}}, year = {{2023}}, } @inbook{50734, author = {{Friedberger, Vanessa and Kaiser, Michaela and Kottmann, Brigitte and Schwermann, Anna}}, booktitle = {{Potenziale erkennen - Talente entwickeln - Bildung nachhaltig gestalten. Beiträge aus der Begabungsforschung }}, editor = {{Fischer, Christian and Fischer-Ontrup , Christiane and Käpnick, Friedhelm and Neuber, Nils and Reintjes, Christian}}, pages = {{247--259}}, publisher = {{Waxmann}}, title = {{{Fallbezogene Reflexionen von Haltung und Professionalisierung pädagogischer Akteur*innen im Kontext begabungs- und leistungsfördernder Schulentwicklung}}}, year = {{2023}}, } @article{31189, abstract = {{Given a geometrically finite hyperbolic surface of infinite volume it is a classical result of Patterson that the positive Laplace-Beltrami operator has no $L^2$-eigenvalues $\geq 1/4$. In this article we prove a generalization of this result for the joint $L^2$-eigenvalues of the algebra of commuting differential operators on Riemannian locally symmetric spaces $\Gamma\backslash G/K$ of higher rank. We derive dynamical assumptions on the $\Gamma$-action on the geodesic and the Satake compactifications which imply the absence of the corresponding principal eigenvalues. A large class of examples fulfilling these assumptions are the non-compact quotients by Anosov subgroups.}}, author = {{Weich, Tobias and Wolf, Lasse Lennart}}, journal = {{Communications in Mathematical Physics}}, title = {{{Absence of principal eigenvalues for higher rank locally symmetric spaces}}}, doi = {{https://doi.org/10.1007/s00220-023-04819-1}}, volume = {{403}}, year = {{2023}}, } @inbook{41130, author = {{Meyer-Hamme, Johannes}}, booktitle = {{Geschichtsdidaktik}}, editor = {{Fenn, Monika and Zülsdorf-Kersting, Meik}}, pages = {{138--152.}}, title = {{{Geschichtstheorie im Geschichtsunterricht}}}, year = {{2023}}, } @article{51093, abstract = {{Dynamics-induced interchain charge transfer in a polymer aggregate in stack configuration can be understood by single-oligomer polaron energy.}}, author = {{Bauch, Fabian and Dong, Chuan-Ding and Schumacher, Stefan}}, issn = {{2050-7526}}, journal = {{Journal of Materials Chemistry C}}, keywords = {{Materials Chemistry, General Chemistry}}, number = {{38}}, pages = {{12992--12998}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Dynamics-induced charge transfer in semiconducting conjugated polymers}}}, doi = {{10.1039/d3tc02263c}}, volume = {{11}}, year = {{2023}}, } @article{51266, abstract = {{Cooperative Driving requires ultra-reliable communications, and it is now clear that no single technology will ever be able to satisfy such stringent requirements, if only because active jamming can kill (almost) any wireless technology. Cooperative driving with multiple communication technologies which complement each other opens new spaces for research and development, but also poses several challenges. The work we present tackles the fallback and recovery mechanisms that the longitudinal controlling system of a platoon of vehicles can implement as a distributed system with multiple communication interfaces. We present a protocol and procedure to correctly compute the safe transition between different controlling algorithms, down to autonomous (or manual) driving when no communication is possible. To empower the study, we also develop a new version of PLEXE, which is an integral part of this contribution as the only Open Source, free simulation tool that enables the study of such systems with a modular approach, and that we deem offers the community the possibility of boosting research in this field. The results we present demonstrate the feasibility of safe fallback, but also highlight that such complex systems require careful design choices, as naïve approaches can lead to instabilities or even collisions, and that such design can only be done with appropriate in-silico experiments.}}, author = {{Segata, Michele and Lo Cigno, Renato and Hardes, Tobias and Heinovski, Julian and Schettler, Max and Bloessl, Bastian and Sommer, Christoph and Dressler, Falko}}, issn = {{1536-1233}}, journal = {{IEEE Transactions on Mobile Computing}}, number = {{8}}, pages = {{4792–4806}}, publisher = {{IEEE}}, title = {{{Multi-Technology Cooperative Driving: An Analysis Based on PLEXE}}}, doi = {{10.1109/TMC.2022.3154643}}, volume = {{22}}, year = {{2023}}, } @inproceedings{51264, abstract = {{Platooning is a promising application in the field of vehicular networks. It has the potential to improve traffic flow, but also road safety. However, unreliable communication has strong negative effects on platoon stability and, thus, safety on roads. To improve reliability, in this work, we propose using multi-hop communication for platooning using the Decode and Forward (DF) Full-Duplex Relaying (FDR) scheme together with beamforming. We use computer simulations to demonstrate that FDR latency has no observable negative effect on string stability or safety even while performing an emergency brake. We further show that this combined approach reaches a constant Packet Delivery Ratio (PDR) of 100 % even in situations with high interference and/or congestion, where traditional approaches fail.}}, author = {{Hardes, Tobias and Klingler, Florian and Sommer, Christoph}}, booktitle = {{IEEE Wireless Communications and Networking Conference 2023 (WCNC 2023)}}, location = {{Glasgow, Scotland, UK}}, publisher = {{IEEE}}, title = {{{Improving Platooning Safety with Full Duplex Relaying and Beamforming}}}, doi = {{10.1109/WCNC55385.2023.10118843}}, year = {{2023}}, } @article{51267, abstract = {{We study the suitability of Unmanned Aerial Vehicles (UAVs) as purely opportunistic airborne virtual network infrastructure to support urban wireless networks, specifically in two Vehicle-to-Everything (V2X) use cases: First, UAVs being used as relays for cooperative awareness applications; second, UAVs being used to coordinate channel access for platooning in urban areas. We do not require that these UAVs alter trajectory nor speed from those of their random, unrelated primary missions, so that these additional tasks can be executed with close-to-zero impact on the execution of their primary missions. Based on extensive computer simulations we show that, within a wide band of acceptable speeds, flight routes (up to a standard deviation of 300 m from the optimum) as well as altitudes, opportunistic relaying of transmissions via UAVs can yield a benefit to system performance that is on the same order of magnitude as that of optimally deployed UAVs. We further show that an opportunistic channel access control can reduce the total number of packet collisions by approx. 86 % compared to a scenario without any UAVs. Moreover, much of the reduction in impact due to suboptimal missions can be recovered simply by moderately increasing the number of UAVs.}}, author = {{Hardes, Tobias and Sommer, Christoph}}, issn = {{0140-3664}}, journal = {{Elsevier Computer Communications}}, publisher = {{Elsevier}}, title = {{{Opportunistic Airborne Virtual Network Infrastructure for Urban Wireless Networks}}}, doi = {{10.1016/j.comcom.2023.06.003}}, year = {{2023}}, } @inproceedings{51265, abstract = {{Many exciting future research topics in the field of Cooperative Autonomous Vehicles (CAVs) require the simulation of both connectivity and automation components. However, existing simulation tools focus on only one of these two aspects while making idealistic assumptions about the other. In this work, we motivate the use of established libraries such as gRPC to couple existing independent simulation tools tailored to either connectivity or automation, and demonstrate the feasibility of such an approach. We also describe an Open Source reference implementation coupling CARLA and Veins.}}, author = {{Hardes, Tobias and Turcanu, Ion and Sommer, Christoph}}, booktitle = {{14th IEEE Vehicular Networking Conference (VNC 2023)}}, issn = {{2157-9865}}, location = {{Istanbul, Turkey}}, publisher = {{IEEE}}, title = {{{Poster: A Case for Heterogenous Co-Simulation of Cooperative and Autonomous Driving}}}, doi = {{10.1109/VNC57357.2023.10136319}}, year = {{2023}}, } @inproceedings{47049, abstract = {{As technology advances, Unmanned Aerial Vehicles ( UAVs) have emerged as an innovative solution to a variety of problems in many fields. Automated control of UAVs is most common in large area operations, but they may also increase the versatility of smart home compositions by acting as a physical helper. For example, a voice- controlled UAV could act as an intelligent aerial assistant that can be seamlessly integrated into smart home systems. In this paper, we present a novel Augmented Reality (AR )-based UAV control that provides high-level control over a UAV by automating common UAV missions. In our work, we enable users to operate a small UAV hands-free using only a small set of voice commands. To help users identify the targets, and to understand the UAV ’s intentions, targets within the user’s field of vision are highlighted in an AR interface. We evaluate our approach in a user study (n=26) regarding usability, physical and mental demand, as well as a focus on the users’ preferences. Our study showed that the use of the proposed control was not only accepted, but some users stated that they would use such a system at home to help with some tasks at home }}, author = {{Helmert, Robin and Hardes, Tobias and Yigitbas, Enes}}, booktitle = {{Proceedings of the ACM Symposium on Spatial User Interaction (SUI 2023)}}, location = {{ Sydney, Australia }}, publisher = {{ACM}}, title = {{{Design and Evaluation of an AR Voice-based Indoor UAV Assistant for Smart Home Scenarios}}}, year = {{2023}}, } @inproceedings{45564, author = {{Schubatzky, Thomas and Burde, Jan-Philipp and Große-Heilmann, Rike Isabel and Riese, Josef and Weiler, David}}, booktitle = {{Lernen, Lehren und Forschen in einer digital geprägten Welt. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Aachen 2022}}, editor = {{van Vorst, Helena}}, location = {{Aachen}}, pages = {{490--493}}, title = {{{Entwicklungsprädiktoren fachdidaktischen Wissens zu digitalen Medien}}}, year = {{2023}}, } @inproceedings{45568, author = {{Weiler, David and Burde, Jan-Philipp and Große-Heilmann, Rike Isabel and Lachner, Andreas and Riese, Josef and Schubatzky, Thomas}}, booktitle = {{Lernen, Lehren und Forschen in einer digital geprägten Welt. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Aachen 2022}}, editor = {{van Vorst, Helena}}, pages = {{865--869}}, title = {{{Erste Ergebnisse eines Seminars zur Förderung digitaler Kompetenzen}}}, year = {{2023}}, } @phdthesis{51222, abstract = {{High-quality teacher education is the basis for high competences of future teachers. To prepare them adequately for the demands of their future teaching profession, it is essential to know (i) which subject-specific competences and skills they need and (ii) how these can be acquired in teacher education. However, empirical findings on necessary competences as well as on the design of teacher training courses are scarcely available on the subject of technology, since mainly general, normative recommendations on potential study contents exist. To fill this gap, this work focuses on the investigation of necessary practical competences of prospective technology teachers. The acquisition of such practical competences and skills is of great importance for the school subject of technology when, for example, machines are operated, tools are used, or objects are designed and manufactured. However, there is a lack of a differentiated description of the practical requirements for technology teachers and the teaching-learning processes required for this in the teacher training. The aim of this work is therefore the theory- and empirically-guided development and evaluation of a practical demand-oriented course for the technology teacher training programme at RWTH Aachen University to promote subject-specific practical competences. The development was structured as an iterative process by the Model of Educational Reconstruction (MER), according to which three major aspects were investigated and connected. (1) In a first step, the competences to be acquired were described and structured, taking normative perspectives into account as well as an empirical needs assessment among teachers and teacher educators to clarify and analyse the science subject matter. (2) In a second step, the student teacher´s perspective was surveyed to adapt the course to their initial competences, skills and experiences. (3) In a third step, the content and the didactic structure of the practical course was developed iteratively, considering the findings of the preceding steps and various requirements for the design and the tasks of the practical course (e.g., a necessary differentiation or a self-directed examination of the practical tasks in the course). The practical course was taught in several runs and evaluated with respect to the perceived learning outcomes of the student teachers as well as to the quality of the course. The evaluation was carried out through self-assessment of the students in a questionnaire and a written portfolio. The findings of the evaluation indicate a positive perception regarding the quality of the course. The students positively assessed the course structure (e.g., sequence of the course contents) and individual course elements (e.g., concrete course tasks). Furthermore, an increase in practical competences and skills – regardless of initial experience – was found. The work provides groundwork for further studies, for example on the level of competence acquisition or the long-term effect of the practical course.}}, author = {{Ermel, Dorothee Leonie}}, publisher = {{RWTH Aachen University}}, title = {{{Entwicklung und Evaluation eines Fachpraktikums für das Lehramtsstudium Technik zur Förderung fachpraktischer Kompetenzen}}}, doi = {{10.18154/RWTH-2023-03787}}, year = {{2023}}, } @inbook{46182, author = {{Drepper, Laura and Herrmann, Franziska and Nußbaum, Alena}}, booktitle = {{Schreibunterricht. Studien und Diskurse zum Verschriften und Vertexten}}, editor = {{Lemke, Valerie and Kruse, Norbert and Steinhoff, Torsten and Sturm, Afra}}, pages = {{183--187}}, publisher = {{Waxmann}}, title = {{{Schreibimpulse in sprachlichen Lernprozessen}}}, year = {{2023}}, } @misc{46179, author = {{Drepper, Laura}}, booktitle = {{Wörterbücher zur Sprach- und Kommunikationswissenschaft (WSK) Online}}, publisher = {{De Gruyter}}, title = {{{Rechtschreibfehler}}}, year = {{2023}}, } @misc{46178, author = {{Drepper, Laura}}, booktitle = {{Wörterbücher zur Sprach- und Kommunikationswissenschaft (WSK) Online}}, publisher = {{De Gruyter}}, title = {{{Rechtschreibanalyse}}}, year = {{2023}}, } @misc{46177, author = {{Drepper, Laura}}, booktitle = {{Wörterbücher zur Sprach- und Kommunikationswissenschaft (WSK)}}, publisher = {{De Gruyter}}, title = {{{Rechtschreibregel }}}, year = {{2023}}, }