TY - JOUR AU - Alhaddad, Samer AU - Förstner, Jens AU - Grynko, Yevgen ID - 43018 JF - Journal of Quantitative Spectroscopy and Radiative Transfer KW - tet_topic_scattering SN - 0022-4073 TI - Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength VL - 302 ER - TY - CONF AU - Mwammenywa, Ibrahim AU - Petrov, Dmitry AU - Holle, Philipp AU - Hilleringmann, Ulrich ID - 39359 T2 - 2022 International Conference on Engineering and Emerging Technologies (ICEET) TI - LoRa Transceiver for Load Monitoring and Control System in Microgrids ER - TY - CHAP AU - Fuchs, Christian ED - Popp, Judith-Frederike ED - Voropai, Lioudmila ID - 38150 T2 - Adorno und die Medien: Kritik, Relevanz, Ethik TI - Adorno and the Media in Digital Capitalism ER - TY - GEN AU - Lienen, Christian AU - Middeke, Sorel Horst AU - Platzner, Marco ID - 43048 TI - fpgaDDS: An Intra-FPGA Data Distribution Service for ROS 2 Robotics Applications ER - TY - JOUR AB - Artificial intelligence (AI) has moved beyond the planning phase in many organisations and it is often accompanied by uncertainties and fears of job loss among employees. It is crucial to manage employees attitudes towards the deployment of an AI-based technology effectively and counteract possible resistance behaviour. We present lessons learned from an industry case where we conducted interviews with affected employees. We evaluated derived resistance to AI factors in a large-scale (N = 368) survey and found that the deployment of AI-based technologies does not differ from other IT, but that the change is perceived differently due to misguided expectations. AU - Stieglitz, Stefan AU - Möllmann, Nicholas R.J. AU - Mirbabaie, Milad AU - Hofeditz, Lennart AU - Ross, Björn ID - 43054 IS - 4 JF - International Journal of Management Practice TI - Recommendations for managing AI-driven change processes: when expectations meet reality VL - 16 ER - TY - GEN AU - Tiessen, Michelle ID - 43058 TI - Zur Effektivität des europäischen Kronzeugenprogramms - Der Fall des LKW-Kartells ER - TY - JOUR AU - Mistry, Aashutosh AU - Srinivasan, Venkat AU - Steinrück, Hans-Georg ID - 37267 JF - Advanced Energy Materials KW - General Materials Science KW - Renewable Energy KW - Sustainability and the Environment SN - 1614-6832 TI - Characterizing Ion Transport in Electrolytes via Concentration and Velocity Profiles VL - 13 ER - TY - JOUR AB - AbstractComposite materials, such as fiber reinforced polymers, become increasingly important due to their excellent mechanical and lightweight properties. In this respect, this paper reports the characterization of a unidirectional carbon fiber reinforced polymer composite material. Particularly, the mechanical behavior of the overall composite and of the individual constituents of the composite is investigated. To this end, tensile and shear tests are performed for the composite. As a result, statistics for five transversely isotropic material parameters can be established for the composite. For the description of the mechanical properties of the constituents, tensile tests for the carbon fiber as well as for the polymer matrix are carried out. In addition, the volume fraction of fibers in the matrix is determined experimentally using an ashing technique and Archimedes’ principle. For the Young’s modulus of the fiber, the Young’s modulus and transverse contraction of the matrix, as well as the volume fraction of the constituents, statistics can be concluded. The resulting mechanical properties on both scales are useful for the application and validation of different material models and homogenization methods. Finally, in order to validate the obtained properties in the future, inhomogeneous tests were performed, once a flat plate with a hole and a flat plate with semicircular notches. AU - Penner, Eduard AU - Caylak, Ismail AU - Mahnken, Rolf ID - 42165 JF - Fibers and Polymers KW - Polymers and Plastics KW - General Chemical Engineering KW - General Chemistry SN - 1229-9197 TI - Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations ER - TY - JOUR AU - Lenz, Peter AU - Mahnken, Rolf ID - 43095 JF - Composite Structures KW - Civil and Structural Engineering KW - Ceramics and Composites SN - 0263-8223 TI - Non-local integral-type damage combined to mean-field homogenization methods for composites and its parallel implementation ER - TY - CONF AU - Hoffmann, Max AU - Biehler, Rolf ED - Trigueros, Marı́a ED - Barquero, Berta ED - Hochmuth, Reinhard ED - Peters, Jana ID - 31849 KW - Teaching and learning of specific topics in university mathematics KW - Transition to KW - across and from university mathematics KW - Student Teachers KW - Geometry KW - Congruence KW - Double Discontinuity. T2 - Proceedings of the Fourth Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2022, 19-22 October 2022) TI - Student Teachers ’ Knowledge of Congruence before a University Course on Geometry ER - TY - CONF AU - Florensa, Ignasio AU - Hoffmann, Max AU - Romo Vázquez, Avenilde AU - Zandieh, Michelle AU - Martínez-Planell, Rafael ED - Trigueros, Marı́a ED - Barquero, Berta ED - Hochmuth, Reinhard ED - Peters, Jana ID - 43097 T2 - Proceedings of the Fourth Conference of the International Network for Didactic Research in University Mathematics (INDRUM 2022, 19-22 October 2022) TI - Innovations in university teaching based on mathematic education research ER - TY - JOUR AU - Götte, Thorsten AU - Kolb, Christina AU - Scheideler, Christian AU - Werthmann, Julian ID - 43109 JF - Theor. Comput. Sci. TI - Beep-and-Sleep: Message and Energy Efficient Set Cover VL - 950 ER - TY - GEN AU - Süßmann, Johannes ID - 43186 TI - Pantheon ER - TY - DATA AU - Claes, Leander AU - Webersen, Manuel ID - 12950 TI - pyfds 0.1.6 - modular field simulation tool ER - TY - JOUR AB - The achievement of a flat metasurface has realized extraordinary control over light–matter interaction at the nanoscale, enabling widespread use in imaging, holography, and biophotonics. However, three-dimensional metasurfaces with the potential to provide additional light–matter manipulation flexibility attract only little interest. Here, we demonstrate a three-dimensional metasurface scheme capable of providing dual phase control through out-of-plane plasmonic resonance of L-shape antennas. Under circularly polarized excitation at a specific wavelength, the L-shape antennas with rotating orientation angle act as spatially variant three-dimensional tilted dipoles and are able to generate desire phase delay for different polarization components. Generalized Snell's law is achieved for both in-plane and out-of-plane dipole components through arranging such L-shape antennas into arrays. These three-dimensional metasurfaces suggest a route for wavefront modulation and a variety of nanophotonic applications. AU - Li, Tianyou AU - Chen, Yanjie AU - Wang, Yongtian AU - Zentgraf, Thomas AU - Huang, Lingling ID - 43421 IS - 14 JF - Applied Physics Letters KW - Physics and Astronomy (miscellaneous) SN - 0003-6951 TI - Three-dimensional dipole momentum analog based on L-shape metasurface VL - 122 ER - TY - CONF AU - Yigitbas, Enes AU - Nowosad, Alexander AU - Engels, Gregor ID - 43424 T2 - Proceedings of the 19th IFIP TC13 International Conference on Human-Computer Interaction (INTERACT 2023) TI - Supporting Construction and Architectural Visualization through BIM and AR/VR: A Systematic Literature Review ER - TY - CONF AU - Demir, Caglar AU - Ngonga Ngomo, Axel-Cyrille ID - 43436 KW - dice enexa sail SFB-TRR 318 demir ngonga T2 - Advances in Intelligent Data Analysis XXI: 21st International Symposium on Intelligent Data Analysis, IDA 2023, Louvain-la-Neuve, Belgium, April 12–14, 2023, Proceedings TI - Learning Permutation-Invariant Embeddings for Description Logic Concepts ER - TY - JOUR AB - Lightweight design is a common approach to reduce energy demand in the use stage of vehicles. The production of lightweight materials is usually associated with an increase in energy demand, so the environmental impacts of lightweight structures need to be assessed holistically using a life cycle assessment. To estimate the life cycle environmental impacts of a product in its developmental stage, for example, by life cycle engineering, future changes in relevant influencing factors must be considered. Prospective life cycle assessment provides methods for integrating future scenarios into life cycle assessment studies. However, approaches for integrating prospective life cycle assessment into product development are limited. The objective of this work is to provide the methodological foundation for integrating future scenarios of relevant influencing factors in the development of lightweight structures. The applicability of the novel methodology is demonstrated by a case study of a structural component in a steel, aluminium, and hybrid design. The results show that appropriate decarbonisation measures can reduce the life cycle greenhouse gas emissions by up to 95 percent until 2050. We also found that shifts in the environmentally optimal design are possible in future scenarios. Therefore, the methodology and data provided contribute to improved decision-making in product development. AU - Ostermann, Moritz AU - Grenz, Julian AU - Triebus, Marcel AU - Cerdas, Felipe AU - Marten, Thorsten AU - Tröster, Thomas AU - Herrmann, Christoph ID - 43464 IS - 8 JF - Energies KW - Life Cycle Engineering KW - Life Cycle Assessment KW - Lightweight Design KW - Prospective LCA KW - Future-oriented LCA KW - Energy System KW - Material production KW - Sustainable production SN - 1996-1073 TI - Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures VL - 16 ER - TY - JOUR AU - Biehler, Rolf AU - Liebendörfer, Michael AU - Schmitz, A. ID - 43504 JF - Mitteilungen der Gesellschaft für Didaktik der Mathematik TI - Lernvideos und ihre Erstellung - Das Projekt studiVEMINTvideos VL - 114 ER - TY - CHAP AU - Herzig, Bardo ED - Aßmann, S. ED - Ricken, N. ID - 44049 SN - 978-3-658-30765-3 T2 - Bildung und Digitalität. Analysen - Diskurse - Perspektiven TI - Digitalität, Mediatisierung und Bildung - Megatrends aus medienpädagogischer Perspektive ER - TY - JOUR AU - Herzig, Bardo ID - 44052 IS - 1 JF - Pädagogische Rundschau. Sackgasse oder Meilenstein? Zur Sinnhaftigkeit von Modellbildungen in der Erziehungswissenschaft SN - 0030-9273 TI - Modellbildung und Modellnutzung in der Allgemeinen Didaktik ER - TY - CONF AU - Büker, Petra ID - 44047 TI - Kinderstärkende Pädagogik in der Grundschule im Kontext (post-)pandemischer Herausforderungen. Kennzeichen, Kritische Anfragen und Blinde Flecke. Vortrag an der Tagung: Was Resilienz stärkt. Chancen und Risiken eines immer populärer werdenden Konzepts. Pädagogische Hochschule Heidelberg. ER - TY - CONF AU - Büker, Petra AU - Herding, Jana AU - Drexler, Leonie ID - 44046 TI - KrafT: Bildungsdokumentation in der inklusiven Schule partizipativ gestalten. 9. Paderborner Grundschultag zum Thema: „Demokratie Lernen von Anfang an“. Online ER - TY - JOUR AB - A relatively small body of research has been conducted on the near- and long-term effects of study abroad (SA) to date. This existing research suggests that SA effects on language skills tend to be volatile, while the impact on various aspects of learners’ personal, academic, and professional development may be longer-lasting. Yet, learner perspectives on the dynamics and durability of such effects, in particular in the context of short-term SA programs, remain largely unexplored. This study hence investigates the near-term impact of short-term SA programs as experienced by students within the first months and years following their sojourns. A qualitative case-study design is employed to examine the accounts of four American students of German, who studied abroad in Austria for four weeks and were interviewed repeatedly over a period of up to 40 months after their sojourns. The results suggest that, from the students’ perspective, many effects deteriorate in the near term, although the overall sojourn experience still appears influential. Abstract in German Nur wenige Forschungsvorhaben haben sich bislang den mittel- bis langfristigen Auswirkungen studentischer Auslandsaufenthalte gewidmet; die bisherige Datenlage deutet jedoch darauf hin, dass die Auswirkungen auf sprachliche Kompetenzen eher unbeständig sind, wohingegen die persönliche, studiums- und berufsbezogene Entwicklung der Lernenden länger von einem Auslandsaufenthalt beeinflusst wird. Die Dynamik und Beständigkeit derartiger Auswirkungen wurden jedoch kaum mit Blick auf kurze Auslandsaufenthalte (≤ acht Wochen) sowie aus der Perspektive der Studierenden erforscht, was die vorliegende Studie insbesondere hinsichtlich mittelfristiger Effekte fokussiert. Mittels eines qualitativen Fallstudiendesigns werden die Interviewdaten vier amerikanischer Deutschlernender untersucht, die sich vier Wochen in Österreich aufhielten und in einem Zeitraum von bis zu 40 Monaten nach ihrem Aufenthalt wiederholt befragt wurden. Die Ergebnisse zeigen, dass viele Auswirkungen eines solchen Aufenthalts aus studentischer Perspektive mittelfristig verblassen, auch wenn der Auslandsaufenthalt im Gesamten weiterhin als einflussreiche Erfahrung wahrgenommen wird. AU - Müller, Mareike ID - 44058 IS - 1 JF - Frontiers: The Interdisciplinary Journal of Study Abroad SN - 2380-8144 TI - Near-Term Effects of Short-Term Study Abroad: A Longitudinal Examination of Learner Perceptions VL - 35 ER - TY - CONF AU - Zeipert, Henning AU - von Germeten, Christian AU - Friesen, Olga AU - Claes, Leander AU - Johannesmann, Sarah AU - Henning, Bernd ID - 43233 T2 - Fortschritte der Akustik - DAGA 2023 TI - Investigation of change in dispersive behaviour during adhesive curing in multi-layered structures ER - TY - CONF AU - Claes, Leander ID - 43229 T2 - Fortschritte der Akustik - DAGA 2023 TI - Bestimmung der Volumenviskosität mittels akustischer Absorptionsmessung ER - TY - CONF AU - Nicolai, Marcel AU - Zeipert, Henning AU - Lugovtsova, Yevgeniya AU - Bulling, Jannis AU - Johannesmann, Sarah AU - Prager, Jens AU - Henning, Bernd ID - 43234 T2 - Fortschritte der Akustik - DAGA 2023 TI - Characterization of adhesion strength using guided ultrasonic waves ER - TY - BOOK AB - Durch Digitalisierung und Digitalität entstehen neue Fragestellungen für die formale und non-formale Bildung. Insbesondere die Professionalisierung von Lehrkräften und Fachpersonal steht durch die Dynamik der technologischen und kulturellen Entwicklungen vor weitreichenden Herausforderungen. Der vorliegende Band beschäftigt sich mit der Frage der Professionalisierung von Grundschullehrkräften und pädagogischen Fachkräften für eine Digitale Bildung im Grundschulalter und ist auf der Grundlage des BMBF-Projekts Primat des Pädagogischen in der Digitalen Grundbildung – Grundsatzfragen und Gelingensbedingungen in der Professionalisierung von pädagogischen Akteur:innen für Kinder im Grundschulalter, P3DiG, entstanden. Im ersten Teil des Sammelbandes werden Grundlagen der Professionalisierung für eine Digitale Grundbildung dargelegt. Im zweiten Teil werden die Ergebnisse des Projekts präsentiert. Dabei werden sowohl Professionalisierungsmodelle für eine Digitale Grundbildung als auch die Ergebnisse der im Projekt durchgeführten empirischen Untersuchungen zur Digitalen Grundbildung im Grundschulalter vorgestellt. Der Band kann damit als Grundlage für die Ausarbeitung von Professionalisierungskonzepten in Hochschulen, Seminaren und Weiterbildungseinrichtungen dienen und liefert Impulse für die weitere wissenschaftliche Auseinandersetzung. ED - Irion, Thomas ED - Böttinger, Traugott ED - Kammerl, Rudolf ID - 43390 SN - 9783830946410 TI - Professionalisierung für Digitale Bildung im Grundschulalter. Ergebnisse des Forschungsprojekts P³DiG ER - TY - THES AU - Badalov, Sabuhi ID - 43829 TI - Modelling electron exchange and correlation for catalyst electronic structure simulations ER - TY - JOUR AU - De, Jianbo AU - Ma, Xuekai AU - Yin, Fan AU - Ren, Jiahuan AU - Yao, Jiannian AU - Schumacher, Stefan AU - Liao, Qing AU - Fu, Hongbing AU - Malpuech, Guillaume AU - Solnyshkov, Dmitry ID - 36416 IS - 3 JF - Journal of the American Chemical Society (JACS) KW - Colloid and Surface Chemistry KW - Biochemistry KW - General Chemistry KW - Catalysis SN - 0002-7863 TI - Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates VL - 145 ER - TY - JOUR AU - Jia, Jichao AU - Cao, Xue AU - Ma, Xuekai AU - De, Jianbo AU - Yao, Jiannian AU - Schumacher, Stefan AU - Liao, Qing AU - Fu, Hongbing ID - 35160 IS - 1 JF - Nature Communications KW - General Physics and Astronomy KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Chemistry KW - Multidisciplinary SN - 2041-1723 TI - Circularly polarized electroluminescence from a single-crystal organic microcavity light-emitting diode based on photonic spin-orbit interactions VL - 14 ER - TY - JOUR AU - Rose, Hendrik AU - Vasil'ev, A. N. AU - Tikhonova, O. V. AU - Meier, Torsten AU - Sharapova, Polina ID - 37280 IS - 1 JF - Physical Review A SN - 2469-9926 TI - Quantum-optical excitations of semiconductor nanostructures in a microcavity using a two-band model and a single-mode quantum field VL - 107 ER - TY - GEN AU - Gunasagran, Sharin Kumar AU - Neukötter, Moritz ID - 44100 TI - Automatisierung der Auswertung rheologischer Messungen (Studienarbeit) ER - TY - GEN AU - Neukötter, Moritz AU - Jesinghausen, Steffen AU - Schmid, Hans-Joachim ID - 44102 TI - Instabilities of Polymer Melt Suspensions under Uniaxial Extension (Poster) ER - TY - CONF AU - Anthony, Christopher J. AU - Yost, M AU - Howe, A AU - Schwab, Susanne AU - Hassani, Sepideh AU - Hellmich, Frank AU - Löper, Marwin Felix AU - Görel, Gamze ID - 44169 TI - Examining the Measurement Invariance and Convergent Validity of the SSIS-SELb-Student in Austria and Germany. 44th Annual Conference of the International School Psychology Association (ISPA) 2023. ER - TY - GEN AU - Schmelzle, Lars AU - Mergheim, Julia AU - Possart, Gunnar AU - Striewe, Marius AU - Meschut, Gerson ID - 44182 T2 - 23. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Experimentelle und numerische Untersuchung des Einflusses variabler Betriebstemperaturen auf das Trag- und Versagensverhalten struktureller Klebverbindungen unter Crashbelastung ER - TY - CONF AB - Abstract. In order to reduce global energy consumption in production and industry along with the associated CO2 emissions, existing resources must be used more efficiently. This includes the energy-efficient and comprehensive recycling of a wide range of metals. Especially for the production of aluminium, there is a large potential for saving energy using efficient recycling processes. With regard to the recycling of aluminium studies have shown that solid-state recycling processes are significantly more efficient considering the used energy and resources compared to the conventional, smelting-metallurgical recycling process. In this paper, the direct and energy-efficient friction-induced recycling process (FIRP) based on the conform process is further described and analysed in terms of the temperature-property relationships. For this purpose, the influence of the processing temperature on the microstructure and properties of the recycled semi-finished products is investigated using the toll system that enables an ECAP forming. Specific sections of the (in theory) infinite, recycled semi-finished product are taken and analysed at different process temperatures of the solid state recycling process. Based on these sections, the properties in terms of mechanical hardness, strength, ductility and grain size are analysed and a degressive relationship between process temperature and mechanical hardness up to a temperature of 270 °C can be shown. Applying the Hall-Petch relationship, it is analysed whether there is a correlation between the strength and the microstructure in the form of the grain size. AU - Borgert, Thomas AU - Homberg, Werner ID - 44036 KW - Recycling KW - Aluminium KW - Friction-Induced KW - Energy Efficiency SN - 2474-395X T2 - Materials Research Proceedings TI - Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP) ER - TY - CHAP AU - Mildorf, Jarmila AU - Ketteler, Daniel ED - Mildorf, Jarmila ED - Punzi, Elisabeth ED - Singer, Christoph ID - 37519 SN - 9780197620540 T2 - Narrative and Mental Health Today: Reimagining Theory and Practice TI - Writing as Narrative Resource in Therapeutic Settings: Diaries, Sketches, Notes ER - TY - BOOK ED - Mildorf, Jarmila ED - Punzi, Elisabeth ED - Singer, Christoph ID - 37518 SN - 9780197620540 TI - Narrative and Mental Health: Reimagining Theory and Practice ER - TY - JOUR AB - Die Wirtschaftlichkeit von Wärmemotoren wird maßgeblich durch die Rückführung von Wärme in Rekuperatoren beeinflusst. Beim isobaren Expansionsmotor vom Bush-Typ, einem Wärmemotor, welcher bereits mit Wärmequellen ab 60°C betrieben werden kann, steigt der thermische Wirkungsgrad durch den Einsatz von Rekuperatoren signifikant. Gleichzeitig wirken sich das Fluidvolumen des Wärmeübertragers sowie der beim Betrieb auftretende Druckverlust negativ auf den thermischen Wirkungsrad aus. In dieser Arbeit wird der Zusammenhang von Totvolumen, Druckverlust und Wärmerückgewinnung untersucht und Empfehlungen für den Betrieb von Rekuperatoren am isobaren Expansionsmotor gegeben. AU - Mügge, Nils AU - Kronberg, Alexander AU - Glushenkov, Maxim AU - Kenig, Eugeny Y. ID - 42252 IS - 5 JF - Chemie Ingenieur Technik KW - Isobarer Expansionsmotor KW - Dynamische Wärmeübertragungsmodellierung KW - Phasenwechsel KW - dichte Arbeitsmedien TI - Untersuchung überlagerter Effekte von Druckverlust und Totvolumen durch Rekuperation am isobaren Expansionsmotor VL - 95 ER - TY - CHAP AU - Mildorf, Jarmila AU - Punzi, Elisabeth AU - Singer, Christoph ED - Mildorf, Jarmila ED - Punzi, Elisabeth ED - Singer, Christoph ID - 44217 SN - 978-0-19-762054-0 T2 - Narrative and Mental Health: Reimagining Theory and Practice TI - Narratives and Mental Health: An Introduction ER - TY - JOUR AU - Schmolke, Tobias AU - Teutenberg, Dominik AU - Meschut, Gerson ID - 43130 JF - The Journal of Adhesion TI - Investigation of the leak tightness of structural adhesive joints for use in battery housings considering mechanical and corrosive loads ER - TY - JOUR AU - Köring, Laura AU - Stepen, Arne AU - Birenheide, Bernhard AU - Barth, Simon AU - Leskov, Maxim AU - Schoch, Roland AU - Krämer, Felix AU - Breher, Frank AU - Paradies, Jan ID - 42878 JF - Angewandte Chemie International Edition KW - General Chemistry KW - Catalysis SN - 1433-7851 TI - Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C−F and S−F Bond Activation ER - TY - JOUR AU - Köring, Laura AU - Stepen, Arne AU - Birenheide, Bernhard AU - Barth, Simon AU - Leskov, Maxim AU - Schoch, Roland AU - Krämer, Felix AU - Breher, Frank AU - Paradies, Jan ID - 42879 JF - Angewandte Chemie KW - General Medicine SN - 0044-8249 TI - Boron‐Centered Lewis Superacid through Redox‐Active Ligands: Application in C−F and S−F Bond Activation ER - TY - CONF AU - Göddecke, Johannes AU - Meschut, Gerson ID - 42877 TI - Damping Properties of Bonded Structures Under Dynamic Loading ER - TY - JOUR AU - Cara, Eleonora AU - Hönicke, Philipp AU - Kayser, Yves AU - Lindner, Jörg K. N. AU - Castellino, Micaela AU - Murataj, Irdi AU - Porro, Samuele AU - Angelini, Angelo AU - De Leo, Natascia AU - Pirri, Candido Fabrizio AU - Beckhoff, Burkhard AU - Boarino, Luca AU - Ferrarese Lupi, Federico ID - 42953 IS - 3 JF - ACS Applied Polymer Materials KW - Organic Chemistry KW - Polymers and Plastics KW - Process Chemistry and Technology SN - 2637-6105 TI - Developing Quantitative Nondestructive Characterization of Nanomaterials: A Case Study on Sequential Infiltration Synthesis of Block Copolymers VL - 5 ER - TY - JOUR AB - AbstractThe use of structured measuring systems to prevent wall slip is a common approach to obtain absolute rheological values. Typically, only the minimum distance between the measuring surfaces is used for further calculation, implying that no flow occurs between the structural elements. But this assumption is misleading, and a gap correction is necessary. To determine the radius correction $$\Delta r$$ Δ r for specific geometries, we conducted investigations on three Newtonian fluids (two silicon oils and one suspension considered to be Newtonian in the relevant shear rate range). The results show that $$\Delta r$$ Δ r is not only shear- and material-independent, but geometry-dependent, providing a Newtonian flow behaviour in a similar viscosity range. Therefore, a correction value can be determined with only minute deviations in different Newtonian fluids. As the conducted laboratory measurements are very time-consuming and expensive, a CFD-approach with only very small deviations was additionally developed and compared for validation purposes. Therefore, simulation is an effective and resource-efficient alternative to the presented laboratory measurements to determine $$\Delta r$$ Δ r for the correction of structured coaxial geometries even for non-Newtonian fluids in the future. AU - Josch, Sebastian AU - Jesinghausen, Steffen AU - Dechert, Christopher AU - Schmid, Hans-Joachim ID - 36983 JF - Rheologica Acta KW - rheology KW - rheometry KW - suspension KW - coaxial KW - correction SN - 0035-4511 TI - Experimental and simulative determination and correction of the effective gap extension in structured coaxial measuring systems ER - TY - BOOK AU - Allmer, Thomas ID - 42938 TI - Universities and Academic Labour in Times of Precarisation and Digitalisation ER - TY - CONF AB - We present an approach for guaranteed constraint satisfaction by means of data-based optimal control, where the model is unknown and has to be obtained from measurement data. To this end, we utilize the Koopman framework and an eDMD-based bilinear surrogate modeling approach for control systems to show an error bound on predicted observables, i.e., functions of the state. This result is then applied to the constraints of the optimal control problem to show that satisfaction of tightened constraints in the purely data-based surrogate model implies constraint satisfaction for the original system. AU - Schaller, Manuel AU - Worthmann, Karl AU - Philipp, Friedrich AU - Peitz, Sebastian AU - Nüske, Feliks ID - 30125 IS - 1 T2 - IFAC-PapersOnLine TI - Towards reliable data-based optimal and predictive control using extended DMD VL - 56 ER - TY - JOUR AU - Hetkämper, Tim AU - Koch, Kevin AU - Claes, Leander AU - Henning, Bernd ID - 37543 IS - 2 JF - tm - Technisches Messen KW - Schlierentechnik TI - Phase-preserving methods to visualise ultrasonic fields with schlieren imaging VL - 90 ER -