TY - JOUR AU - Bruns, Bastian AU - Gross, Michel AU - Grünewald, Marcus AU - Bertsch, Valentin AU - Riese, Julia ID - 52229 JF - Journal of Cleaner Production KW - Industrial and Manufacturing Engineering KW - Strategy and Management KW - General Environmental Science KW - Renewable Energy KW - Sustainability and the Environment KW - Building and Construction SN - 0959-6526 TI - A multi-step framework for the design of a flexible power-to-methane process ER - TY - JOUR AB - In this work, we consider optimal control problems for mechanical systems with fixed initial and free final state and a quadratic Lagrange term. Specifically, the dynamics is described by a second order ODE containing an affine control term. Classically, Pontryagin's maximum principle gives necessary optimality conditions for the optimal control problem. For smooth problems, alternatively, a variational approach based on an augmented objective can be followed. Here, we propose a new Lagrangian approach leading to equivalent necessary optimality conditions in the form of Euler-Lagrange equations. Thus, the differential geometric structure (similar to classical Lagrangian dynamics) can be exploited in the framework of optimal control problems. In particular, the formulation enables the symplectic discretisation of the optimal control problem via variational integrators in a straightforward way. AU - Leyendecker, Sigrid AU - Maslovskaya, Sofya AU - Ober-Blöbaum, Sina AU - Almagro, Rodrigo T. Sato Martín de AU - Szemenyei, Flóra Orsolya ID - 53101 JF - Journal of Computational Dynamics KW - Optimal control problem KW - Lagrangian system KW - Hamiltonian system KW - Variations KW - Pontryagin's maximum principle. SN - 2158-2491 TI - A new Lagrangian approach to control affine systems with a quadratic Lagrange term ER - TY - JOUR AU - Stumpe, Miriam ID - 52092 JF - Transportation Research Procedia SN - 2352-1465 TI - A new mathematical formulation for the simultaneous optimization of charging infrastructure and vehicle schedules for electric bus systems VL - 78 ER - TY - JOUR AB - AbstractApproximation of subdifferentials is one of the main tasks when computing descent directions for nonsmooth optimization problems. In this article, we propose a bisection method for weakly lower semismooth functions which is able to compute new subgradients that improve a given approximation in case a direction with insufficient descent was computed. Combined with a recently proposed deterministic gradient sampling approach, this yields a deterministic and provably convergent way to approximate subdifferentials for computing descent directions. AU - Gebken, Bennet ID - 51208 JF - Computational Optimization and Applications KW - Applied Mathematics KW - Computational Mathematics KW - Control and Optimization SN - 0926-6003 TI - A note on the convergence of deterministic gradient sampling in nonsmooth optimization ER - TY - GEN AU - Baumann, Martin AU - Bengler, Klaus AU - Berndt-Tolzmann, Sandro AU - Brettin, Leon Johann AU - Diermeyer, Frank AU - Fastenmeier, Wolfgang AU - Fleischer, Torsten AU - Flemisch, Frank AU - Frey, Alexander AU - Gräcmann, Nicole AU - Hardes, Tobias AU - Herzberger, Nicolas AU - Hesse, Tobias AU - Huetten, Manuela AU - Klingler, Florian AU - Jipp, Meike AU - Kolarova, Viktoriya AU - Kühn, Matthias AU - Maag, Christian AU - Marx, Torsten AU - Maurer, Markus AU - Merkel, Nora AU - Oehl, Michael AU - Oubaid, Viktor AU - Plum, Lena AU - Riegelhuth, Gerd AU - Salem, Nayel Fabian AU - Schrank, Andreas AU - Shi, Elisabeth AU - Sommer, Christoph AU - Wasser, Joscha AU - Wietfeld, Christian ID - 52872 TI - Abschlussbericht der Arbeitsgruppe "Forschungsbedarf Teleoperation" ER - TY - JOUR AU - Zietlow, Christian AU - Lindner, Jörg ID - 52090 JF - Numerical Algorithms TI - ADMM-TGV image restoration for scientific applications with unbiased parameter choice ER - TY - CONF AU - Schryen, Guido AU - Marrone, Mauricio AU - Yang, Jiaqi ID - 47427 T2 - Proceedings of the 57th Hawaii International Conference on System Science (HICSS 2024) TI - Adopting Generative AI for Literature Reviews: An Epistemological Perspective ER - TY - GEN AU - Treder, Alexandra ID - 50208 T2 - Forschungsportal für Spracherwerb und Migration (daz-portal) TI - Alexandra Treder (Universität Paderborn) rezensiert: Döll, Marion & Michalak, Magdalena (2023): Deutsch als Zweitsprache und inklusive Bildung. [Deutsch als Zweitsprache – Positionen, Perspektiven, Potenziale, Bd. 3]. Münster: Waxmann, 142 Seiten. ISBN 978-3-8309-4711-0. VL - 26 ER - TY - GEN AU - Breckner, Anne ID - 52465 TI - All you need is love… Gedanken für das neue Jahr ER - TY - CHAP AB - Twitter ist jetzt X und befindet sich auf dem absteigenden Ast. Auf diesem Ast sitzt Facebook bereits seit längerem. Der Kurzvideodienst Vine, Vorgänger von TikTok, ist Geschichte. Und auch bei Google klingeln die Alarmglocken angesichts der „neuen“ Konkurrenz durch Microsoft und ChatGPT. Umso dringlicher wird also die Historisierung der „sozialen Medien“, das heißt, sie in ihren historischen Kontext einzuordnen und ihren Mythos zu entzaubern. Dabei wartet das Vorhaben mit einer doppelten Herausforderung auf: Erstens, dass es sich bei den Unternehmen der Branche und zweitens auch bei den dort gebildeten Gemeinschaften um recht flüchtige, wandelhaften Gestalten handelt. Scheitern und Wandel ist Teil der „sozialen Medien“ – und sei es nur in der schnellen Abfolge der Moden des „nächsten großen Dings“. Dementsprechend versucht dieser Beitrag mit einem systematischeren Ansatz als dem der gesellschaftlichen Selbstbeschreibung, die Entwicklung des sozio-digitalen Phänomens „soziale Medien“ in dessen Zeitkontext einzuordnen. AU - Schmitt, Martin ID - 52538 KW - Digitalgeschichte KW - Soziale Medien KW - Technikgeschichte KW - Wirtschaftsgeschichte KW - Digitalisierung KW - Twitter KW - Facebook KW - Meta T2 - Soziale Medien – wie sie wurden, was sie sind TI - Alles geht? Die jüngste Geschichte der „sozialen Medien“. Zwischen Wirtschaft und Gemeinschaft ER - TY - JOUR AU - Kullmer, Gunter AU - Weiß, Deborah AU - Schramm, Britta ID - 51737 JF - Engineering Fracture Mechanics KW - Mechanical Engineering KW - Mechanics of Materials KW - General Materials Science SN - 0013-7944 TI - An alternative and robust formulation of the fatigue crack growth rate curve for long cracks VL - 296 ER - TY - JOUR AB - We propose an indicator for detecting anomalous stock market valuation in real time such that market participants receive timely signals so as to be able to take stabilizing action. Unlike existing approaches, our anomaly indicator introduces three methodological novelties. First, we use an endogenous, purely data-driven, nonparametric trend identification method to separate long-term market movements from more short-term ones. Second, we apply SETAR models that allow for asymmetric expansions and contractions around the long-term trend and find systematic stock price cycles. Third, we implement these findings in our indicator and conduct real-time market forecasts, which have so far been neglected in the literature. Applications of our indicator using monthly S&P 500 stock data from 1970 to the end of 2022 show that short-term anomalous market movements can be identified in real time up to one year ahead. We predict all major anomalies, including the 1987 Bubble and the initial phase of the Financial Crisis that began in 2007. In total, our anomaly indicator identifies more than 80% of all – even minor – anomalous episodes. Thus, smoothing market exaggerations through early signaling seems possible. AU - Fritz, Marlon AU - Gries, Thomas AU - Wiechers, Lukas ID - 50719 JF - Quantitative Finance KW - General Economics KW - Econometrics and Finance KW - Finance SN - 1469-7688 TI - An early indicator for anomalous stock market performance ER - TY - CONF AU - Kruse, Stephan AU - Schwabe, Tobias AU - Kneuper, Pascal AU - Kurz, Heiko G. AU - Meinecke, March-Michael AU - Scheytt, Christoph ID - 50287 T2 - German Microwave Conference (GeMiC) TI - Analysis and Simulation of a Photonic Multiband FMCW Radar Sensor System using Nyquist Pulses ER - TY - JOUR AB - Through tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed that additively produced samples exhibit anisotropic microstructures. This anisotropy compromises the mechanical properties and complicates the loading state in the implant. Moreover, the minimum requirements as specified per designated standards such as ISO 5832-11 are not met. The remedy to this problem is performing a conventional heat treatment. As this route requires energy, infrastructure, labor, and expertise, which in turn mean time and money, many of the additive manufacturing benefits are negated. Thus, the goal of this work was to achieve better isotropy by applying only adapted additive manufacturing process parameters, specifically focusing on the build orientations. In this work, samples orientated in 90°, 45°, and 0° directions relative to the building platform were manufactured and tested. These tests included mechanical (tensile and fatigue tests) as well as microstructural analyses (SEM and EBSD). Subsequently, the results of these tests such as fractography were correlated with the acquired mechanical properties. These showed that 90°-aligned samples performed best under fatigue load and that all requirements specified by the standard regarding monotonic load were met. AU - Milaege, Dennis AU - Eschemann, Niklas AU - Hoyer, Kay-Peter AU - Schaper, Mirko ID - 52738 IS - 2 JF - Crystals KW - Inorganic Chemistry KW - Condensed Matter Physics KW - General Materials Science KW - General Chemical Engineering SN - 2073-4352 TI - Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion VL - 14 ER - TY - CONF AB - What is preventing us from building a NLP system that could help real people in real situations, for instance when they need legal advice but don{’}t understand law? This question is trickier than one might think, because legal systems vary from country to country, so do the law books, availability of data, and incomprehensibility of legalese. In this paper we focus Germany (which employs the civil-law system where, roughly speaking, interpretation of law codes dominates over precedence) and lay a foundational work to address the laymen{’}s legal question answering empirically. We create GerLayQA, a new dataset comprising of 21k laymen{’}s legal questions paired with answers from lawyers and grounded to concrete law book paragraphs. We experiment with a variety of retrieval and answer generation models and provide an in-depth analysis of limitations, which helps us to provide first empirical answers to the question above. AU - Büttner, Marius AU - Habernal, Ivan ED - Graham, Yvette ED - Purver, Matthew ID - 52841 T2 - Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers) TI - Answering legal questions from laymen in German civil law system ER - TY - JOUR AU - Eke, Norbert Otto ID - 50985 JF - Studia theodisca 31 TI - Artaud ± Brecht Peter Weiss’ Theater-Revolution (Marat/Sade) ER - TY - JOUR AU - Weber, Katharina S. AU - Schlesinger, Sabrina AU - Lang, Alexander AU - Straßburger, Klaus AU - Maalmi, Haifa AU - Zhu, Anna AU - Zaharia, Oana-Patricia AU - Strom, Alexander AU - Bönhof, Gidon J. AU - Goletzke, Janina AU - Trenkamp, Sandra AU - Wagner, Robert AU - Buyken, Anette AU - Lieb, Wolfgang AU - Roden, Michael AU - Herder, Christian AU - Roden, M. AU - Al-Hasani, H. AU - Belgardt, B. AU - Lammert, E. AU - Bönhof, G. AU - Geerling, G. AU - Herder, C. AU - Icks, A. AU - Jandeleit-Dahm, K. AU - Kotzka, J. AU - Kuß, O. AU - Rathmann, W. AU - Schlesinger, S. AU - Schrauwen-Hinderling, V. AU - Szendroedi, J. AU - Trenkamp, S. AU - Wagner, R. ID - 50740 JF - Nutrition, Metabolism and Cardiovascular Diseases KW - Cardiology and Cardiovascular Medicine KW - Nutrition and Dietetics KW - Endocrinology KW - Diabetes and Metabolism KW - Medicine (miscellaneous) SN - 0939-4753 TI - Association of dietary patterns with diabetes-related comorbidities varies among diabetes endotypes ER - TY - GEN AU - Schmidt, Rebecca ID - 51301 T2 - SozMethode TI - Automatische Transkriptionssoftware – ein Erfahrungsbericht. ER - TY - JOUR AU - Huybrechts, Yves AU - Karaca, Resul ID - 49772 JF - Synergies Pays germanophones SN - 1866-5268 TI - BelgienNet – une plateforme pour l’accès aux langues et cultures de la Belgique VL - 16 ER - TY - JOUR AB - Negated statements require more processing efforts than assertions. However, in certain contexts, repeating negations undergo adaptation, which over time mitigates the effort. Here, we ask negations hamper visual processing and whether consecutive repetitions mitigate its influence. We assessed the overall attentional capacity and its distribution, the relative weight, quantitatively using the formal Theory of Visual Attention (TVA). Here, we employed a very simple form for negations, binary negations. Negated instructions, expressing the only alternative to the core supposition, were cognitively demanding, resulting in a loss of attentional capacity in three experiments. The overall attentional capacity recovered gradually but stagnated at a lower level than with assertions, even after many repetitions. Additionally, negations distributed the attention equally between target and reference stimulus. Repetitions slightly increased the reference' share of attention. Assertions, on the other hand, shifted the attentional weight towards the target. Few repetitions slightly decreased the bias towards the target, many repetitions increased the bias. AU - Banh, Ngoc Chi AU - Tünnermann, Jan AU - Rohlfing, Katharina J. AU - Scharlau, Ingrid ID - 53072 JF - Attention, Perception, & Psychophysics TI - Benefiting from Binary Negations? Verbal Negations Decrease Visual Attention and Balance Its Distribution ER -