TY - CONF AB - Abstract. In the numerical simulation of mechanical joining technologies such as clinching, the material modeling of the joining parts is of major importance. This includes modeling the damage and failure behavior of the materials in accordance with varying occurring stress states. This paper presents a calibration method of three different fracture models. The calibration of the models is done by use of experimental data from a modified punch test, tensile test and bulge test in order to map the occurring stress states from clinching processes and to precisely model the resulting failure behavior. Experimental investigations were carried out for an aluminum alloy EN AW-6014 in temper T4 and compared with the simulative results generated in LS-DYNA. The comparison of force-displacement curves and failure initiation shows that the Hosford–Coulomb model predicts the failure behavior for the material used and the tests applied with the best accuracy. AU - Böhnke, Max AU - Bielak, Christian Roman AU - Friedlein, Johannes AU - Bobbert, Mathias AU - Mergheim, Julia AU - Steinmann, Paul AU - Meschut, Gerson ID - 43462 SN - 2474-395X T2 - Materials Research Proceedings TI - A calibration method for failure modeling in clinching process simulations ER - TY - JOUR AB - Abstract Purpose Wearables serve to quantify the on-court activity in intermittent sports such as field hockey (FH). Based on objective data, benchmarks can be determined to tailor training intensity and volume. Next to average and accumulated values, the most intense periods (MIPs) during competitive FH matches are of special interest, since these quantify the peak intensities players experience throughout the intermittent matches. The aim of this study was to retrospectively compare peak intensities between training and competition sessions in a male FH team competing in the first german division. Methods Throughout an 8-week in-season period, 372 individual activity datasets (144 datasets from competitive sessions) were recorded using the Polar Team Pro sensor (Kempele, Finland). MIPs were calculated applying a rolling window approach with predefined window length (1–5 min) and calculated for Total distance, High-Intensity-Running distance (> 16 km/h), Sprinting distance (> 20 km/h) and Acceleration load. Significant differences between training and competition MIPs were analysed through non-parametric statistical tests (P < 0.05). Results Analyses revealed higher MIPs during competition for all considered outcomes (P < 0.001). Effect size estimation revealed strongest effects for sprinting distance (d = 1.89 to d = 1.22) and lowest effect sizes for acceleration load (d = 0.92 to d = 0.49). Conclusion The present findings demonstrate that peak intensities during training do not reach those experienced during competitive sessions in a male FH team. Training routines such as manipulations of court-dimensions and team sizes might contribute to this discrepancy. Coaches should compare training and competition intensities to recalibrate training routines to optimize athletes’ preparation for competition. AU - Büchel, Daniel AU - Döring, Michael AU - Baumeister, Jochen ID - 49636 JF - Journal of Science in Sport and Exercise KW - Nutrition and Dietetics KW - Rehabilitation KW - Orthopedics and Sports Medicine KW - Physical Therapy KW - Sports Therapy and Rehabilitation KW - Physiology SN - 2096-6709 TI - A Comparison of the Most Intense Periods (MIPs) During Competitive Matches and Training Over an 8-Week Period in a Male Elite Field Hockey Team ER - TY - GEN AB - This preprint makes the claim of having computed the $9^{th}$ Dedekind Number. This was done by building an efficient FPGA Accelerator for the core operation of the process, and parallelizing it on the Noctua 2 Supercluster at Paderborn University. The resulting value is 286386577668298411128469151667598498812366. This value can be verified in two steps. We have made the data file containing the 490M results available, each of which can be verified separately on CPU, and the whole file sums to our proposed value. AU - Van Hirtum, Lennart AU - De Causmaecker, Patrick AU - Goemaere, Jens AU - Kenter, Tobias AU - Riebler, Heinrich AU - Lass, Michael AU - Plessl, Christian ID - 43439 T2 - arXiv:2304.03039 TI - A computation of D(9) using FPGA Supercomputing ER - TY - JOUR AU - Krämer, Felix AU - Paradies, Jan AU - Fernández, Israel AU - Breher, Frank ID - 47589 JF - Nature Chemistry KW - General Chemical Engineering KW - General Chemistry SN - 1755-4330 TI - A crystalline aluminium–carbon-based ambiphile capable of activation and catalytic transfer of ammonia in non-aqueous media ER - TY - CONF AU - Ködding, Patrick AU - Tissen, Denis AU - Koldewey, Christian ID - 49322 T2 - Proceedings of the 56th CIRP Conference on Manufacturing Systems, CIRP CMS ‘23 TI - A Data Map for Product Creation: Tasks, Data Flows, and IT-Systems from the Initial Idea to the Start of Production ER - TY - JOUR AU - Hamdoun, Ayoub AU - Mahnken, Rolf ID - 44892 IS - 1 JF - PAMM KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics SN - 1617-7061 TI - A finite strain gradient theory for viscoplasticity by means of micromorphic regularization VL - 22 ER - TY - JOUR AU - Roos, E. AU - Sebastiani, D. AU - Brehm, Martin ID - 45012 JF - Phys. Chem. Chem. Phys. TI - A Force Field for Bio-Polymers in Ionic Liquids (BILFF) – Part 2: Cellulose in [EMIm][OAc] / Water Mixtures VL - 25 (12) ER - TY - CONF AU - Brock, Jonathan AU - Rempe, Niclas AU - von Enzberg, Sebastian AU - Kühn, Arno AU - Dumitrescu, Roman ID - 49365 T2 - 5th Conference on Production Systems and Logistics TI - A Framework For The Domain-Driven Utilization Of Manufacturing Sensor Data In Process Mining: An Action Design Approach 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 - CONF AU - Brunner-Schwer, Christian AU - Biegler, Max AU - Rethmeier, Michael AU - Schmolke, Tobias AU - Meschut, Gerson AU - Spohr, Sebastian AU - Eckstein, Lutz ID - 45877 TI - A life cycle assessment of joining processes in the automotive industry, illustrated by the example of an EV battery case ER - TY - GEN AB - In the Bogoliubov-Fr\"ohlich model, we prove that an impurity immersed in a Bose-Einstein condensate forms a stable quasi-particle when the total momentum is less than its mass times the speed of sound. The system thus exhibits superfluid behavior, as this quasi-particle does not experience friction. We do not assume any infrared or ultraviolet regularization of the model, which contains massless excitations and point-like interactions. AU - Hinrichs, Benjamin AU - Lampart, Jonas ID - 51376 T2 - arXiv:2311.05361 TI - A Lower Bound on the Critical Momentum of an Impurity in a Bose-Einstein Condensate ER - TY - JOUR AU - Fuchs, Christian ID - 46749 IS - 6 JF - Theory and Society TI - A Marxist-Humanist Perspective on Stuart Hall's Communication Theory VL - 52 ER - TY - JOUR AU - Burmeister, Sascha Christian AU - Guericke, Daniela AU - Schryen, Guido ID - 47431 JF - Flexible Services and Manufacturing Journal TI - A Memetic NSGA-II for the Multi-Objective Flexible Job Shop Scheduling Problem with Real-time Energy Tariffs ER - TY - CONF AU - Lenz, Cederic AU - Henke, Christian AU - Trächtler, Ansgar ID - 48570 T2 - 2023 IEEE 21st International Conference on Industrial Informatics (INDIN) TI - A Methodical Approach to Hybrid Modelling for Contextual Anomaly Detection on Time-Series Data ER - TY - JOUR AB - AbstractCold‐box sand (CBS) belongs to the granular materials and consists of sand and a binder. The behavior of CBS is simulated with a micropolar model, whereby the additional degree of freedom of the model describes the rotation of the sand grains. The model is used to generate a shear band under pressure for three different meshes, where the force‐displacement curves of the three meshes converge so that no mesh dependence occurs. Another requirement of the model is the consideration of asymmetric behavior for compression and tension. Due to the additional degree of freedom the implicit implementation of the micropolar continuum is very time‐consuming. Therefore, an explicit implementation is considered as an alternative possibility. This paper compares the advantages and disadvantages of both methods and the results for both calculations. AU - Börger, Alexander AU - Mahnken, Rolf ID - 52219 JF - PAMM KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics SN - 1617-7061 TI - A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests ER - TY - JOUR AU - Kurock, Ricarda AU - Teichert, Jeannine AU - Meister, Dorothee M. AU - Gerhardts, Lara AU - Buhl, Heike M. AU - Bonanati, Sabrina ID - 48370 IS - 14 JF - Journal of Adolescence TI - A mixed-methods study of the quality of parental support during adolescents' information-related Internet use as a co-construction process VL - 1 ER - TY - JOUR AB - I study the effect of heterogeneous beliefs about asset prices on the long-term behavior of financial markets. Starting from the ideas of Abreu and Brunnermeier (Citation2003), a two-dimensional system of differential equations is developed. The first dynamic variable is the asset price growth rate. The second dynamic variable is the number of investors who believe that asset prices are abnormally high. In a phase plane analysis, I find both stable and unstable equilibria, depending on the spread of information and the response to other agents’ beliefs. If individuals try to increase their returns while perceiving more overpricing, these equilibria can be spirals or even approach limit cycles. Although I intend to study general price patterns, abnormally high asset prices can be caused by financial bubbles. In this model, bubbles can emerge and deflate both in cycles or directly, or they can grow until they burst. Further, I analyze market behavior after a central bank increases the interest rate. This can lead to new stable equilibria, but the emergence and bursting of bubbles cannot be prevented. AU - Burs, Carina ID - 49309 IS - 2 JF - Cogent Economics & Finance KW - asset pricing KW - subjective information KW - stability conditions KW - monetary policy KW - risk aversion SN - 2332-2039 TI - A model of cycles and bubbles under heterogeneous beliefs in financial markets VL - 11 ER - TY - JOUR AB - We present strong enhancement of third harmonic generation in an amorphous silicon metasurface consisting of elliptical nano resonators. We show that this enhancement originates from a new type of multi-mode Fano mechanism. These ‘Super-Fano’ resonances are investigated numerically in great detail using full-wave simulations. The theoretically predicted behavior of the metasurface is experimentally verified by linear and nonlinear transmission spectroscopy. Moreover, quantitative nonlinear measurements are performed, in which an absolute conversion efficiency as high as ηmax ≈ 2.8 × 10−7 a peak power intensity of 1.2 GW cm−2 is found. Compared to an unpatterned silicon film of the same thickness amplification factors of up to ~900 are demonstrated. Our results pave the way to exploiting a strong Fano-type multi-mode coupling in metasurfaces for high THG in potential applications. AU - Hähnel, David AU - Golla, Christian AU - Albert, Maximilian AU - Zentgraf, Thomas AU - Myroshnychenko, Viktor AU - Förstner, Jens AU - Meier, Cedrik ID - 44097 IS - 1 JF - Light: Science & Applications KW - tet_topic_meta SN - 2047-7538 TI - A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces VL - 12 ER - TY - GEN AB - Sparsity is a highly desired feature in deep neural networks (DNNs) since it ensures numerical efficiency, improves the interpretability of models (due to the smaller number of relevant features), and robustness. In machine learning approaches based on linear models, it is well known that there exists a connecting path between the sparsest solution in terms of the $\ell^1$ norm,i.e., zero weights and the non-regularized solution, which is called the regularization path. Very recently, there was a first attempt to extend the concept of regularization paths to DNNs by means of treating the empirical loss and sparsity ($\ell^1$ norm) as two conflicting criteria and solving the resulting multiobjective optimization problem. However, due to the non-smoothness of the $\ell^1$ norm and the high number of parameters, this approach is not very efficient from a computational perspective. To overcome this limitation, we present an algorithm that allows for the approximation of the entire Pareto front for the above-mentioned objectives in a very efficient manner. We present numerical examples using both deterministic and stochastic gradients. We furthermore demonstrate that knowledge of the regularization path allows for a well-generalizing network parametrization. AU - Amakor, Augustina Chidinma AU - Sonntag, Konstantin AU - Peitz, Sebastian ID - 51159 T2 - arXiv TI - A multiobjective continuation method to compute the regularization path of deep neural networks ER - TY - JOUR AU - Kruse, Stephan AU - Greitens, Jan C. AU - Schwabe, Tobias AU - Kneuper, Pascal AU - Kurz, Heiko G. AU - Scheytt, J. Christoph ID - 47126 JF - IEEE Microwave and Wireless Technology Letters TI - A Narrowband Four-Quadrant Electro-Optical Mixer for Microwave Photonics ER -