TY - JOUR AB - High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated. For specific oblique excitation by semi-guided waves at sufficiently high angles of incidence, the idealized structures do not exhibit any radiative losses, such that reflectance and transmittance for the single port mode add strictly up to one. We consider a series of symmetric, fully and partly etched finite gratings, for parameters found in integrated silicon photonics. These can act as spectral filters with a reasonably flattop response. Apodization can lead to more box shaped reflectance and transmittance spectra. Together with a narrowband Fabry–Perot filter, these configurations are characterized by reflection bands, or transmittance peaks, with widths that span three orders of magnitude. AU - Hammer, Manfred AU - Farheen, Henna AU - Förstner, Jens ID - 43245 IS - 4 JF - Journal of the Optical Society of America B KW - tet_topic_waveguide SN - 0740-3224 TI - How to suppress radiative losses in high-contrast integrated Bragg gratings VL - 40 ER - TY - JOUR AU - Serino, Laura AU - Gil López, Jano AU - Stefszky, Michael AU - Ricken, Raimund AU - Eigner, Christof AU - Brecht, Benjamin AU - Silberhorn, Christine ID - 44081 IS - 2 JF - PRX Quantum KW - General Physics and Astronomy KW - Mathematical Physics KW - Applied Mathematics KW - Electronic KW - Optical and Magnetic Materials KW - Electrical and Electronic Engineering KW - General Computer Science SN - 2691-3399 TI - Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States VL - 4 ER - TY - BOOK AU - Ribbat, Christoph ID - 44080 TI - Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America ER - TY - CONF AB - The nonlinear optical response of quantum well excitons is investigated experimentally using polarization resolved four wave mixing, optical-pump optical-probe, and optical-pump Terahertz-probe spectroscopy. The four-wave mixing data reveal clear signatures of coherent biexcitons which concur with straight-forward polarization selection rules at the Γ point. The type-I samples show the well-established time-domain beating signatures in the transients as well as the corresponding spectral signatures clearly. The latter are also present in type-II samples; however, the smaller exciton and biexciton binding energies in these structures infer longer beating times which, in turn, are accompanied by faster dephasing of the type-II exciton coherences. Furthermore, the THz absorption following spectrally narrow, picosecond excitation at energies in the vicinity of the 1s exciton resonance are discussed. Here, the optical signatures yield the well-established redshifts and blueshifts for the appropriate polarization geometries in type-I quantum well samples also termed “AC Stark Effect”. The THz probe reveals intriguing spectral features which can be ascribed to coherent negative absorption following an excitation into a virtual state for an excitation below the 1s exciton resonance. Furthermore, the scattering and ionization of excitons is discussed for several excitation geometries yielding control rules for elastic and inelastic quasiparticle collisions. AU - Meier, Torsten AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Littmann, J. H. AU - Fey, M. AU - Trautmann, Alexander AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Fuchs, C. AU - Volz, K. AU - Chatterjee, S. ID - 43189 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields VL - 12419 ER - TY - CONF AB - Anomalous currents refer to electronic currents that flow perpendicularly to the direction of the accelerating electric field. Such anomalous currents can be generated when Terahertz fields are applied after an optical interband excitation of GaAs quantum wells. The underlying processes are investigated by numerical solutions of the semiconductor Bloch equations in the length gauge. Excitonic effects are included by treating the manybody Coulomb interaction in time-dependent Hartree-Fock approximation and additionally also carrier-phonon scattering processes are considered. The band structure and matrix elements are obtained from a 14-band k · p model within the envelope function approximation. The random phase factors of the matrix elements that appear due to the separate numerical diagonalization at each k-point are treated by applying a smooth gauge transformation. We present the macroscopic Berry curvature and anomalous current transients with and without excitonic effects. It is demonstrated that the resonant optical excitation of excitonic resonances can significantly enhance the Berry curvature and the anomalous currents. AU - Meier, Torsten AU - Ngo, C. AU - Priyadarshi, S. AU - Duc, H. T. AU - Bieler, M. ID - 43191 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells VL - 12419 ER - TY - CONF AB - The nonlinear optical response of quantum well excitons excited by optical fields is analyzed by numerical solutions of the semiconductor Bloch equations. Differential absorption spectra are computed for resonant pumping at the exciton resonance and the dependence of the absorption changes on the polarization directions of the pump and probe pulses is investigated. Coherent biexcitonic many-body correlations are included in our approach up to third-order in the optical fields. Results are presented for spatially-direct type-I and spatiallyindirect type-II quantum well systems. Due to the spatial inhomogeneity, in type-II structures a finite coupling between excitons of opposite spins exists already on the Hartree-Fock level and contributes to the absorption changes for the case of opposite circularly polarized pump and probe pulses. AU - Meier, Torsten AU - Trautmann, Alexander AU - Stein, M. AU - Schäfer, F. AU - Anders, D. AU - Ngo, C. AU - Steiner, J. T. AU - Reichelt, Matthias AU - Chatterjee, S. ID - 43190 T2 - Ultrafast Phenomena and Nanophotonics XXVII TI - Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations VL - 12419 ER - TY - JOUR AU - Meier, Torsten AU - Schäfer, F. AU - Stein, M. AU - Lorenz, J. AU - Dobener, F. AU - Ngo, C. AU - Steiner, J. T. AU - Fuchs, C. AU - Stolz, W. AU - Volz, K. AU - Hader, J. AU - Moloney, J.V. AU - Koch, S.W. AU - Chatterjee, S. ID - 43139 IS - 8 JF - Applied Physics Letters TI - Gain recovery dynamics in active type-II semiconductor heterostructures VL - 122 ER - TY - GEN AU - Meier, Torsten AU - Grisard, S. AU - Trifonov, A.V. AU - Rose, Hendrik AU - Reichhardt, R. AU - Reichelt, Matthias AU - Schneider, C. AU - Kamp, M. AU - Höfling, S. AU - Bayer, M. AU - Akimov, I.A ID - 43132 T2 - arxiv:2302.02480 TI - Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots ER - TY - JOUR AU - Sperling, Jan AU - Agudelo, Elizabeth ID - 44050 IS - 4 JF - Physical Review A SN - 2469-9926 TI - Entanglement of particles versus entanglement of fields: Independent quantum resources VL - 107 ER - TY - JOUR AU - Sperling, Jan AU - Gianani, Ilaria AU - Barbieri, Marco AU - Agudelo, Elizabeth ID - 40477 IS - 1 JF - Physical Review A SN - 2469-9926 TI - Detector entanglement: Quasidistributions for Bell-state measurements VL - 107 ER - TY - JOUR AU - Lüders, Carolin AU - Pukrop, Matthias AU - Barkhausen, Franziska AU - Rozas, Elena AU - Schneider, Christian AU - Höfling, Sven AU - Sperling, Jan AU - Schumacher, Stefan AU - Aßmann, Marc ID - 42973 IS - 11 JF - Physical Review Letters KW - General Physics and Astronomy SN - 0031-9007 TI - Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography VL - 130 ER - TY - JOUR AB - We study how competition between physicians affects the provision of medical care. In our theoretical model, physicians are faced with a heterogeneous patient population, in which patients systematically vary with regard to both their responsiveness to the provided quality of care and their state of health. We test the behavioral predictions derived from this model in a controlled laboratory experiment. In line with the model, we observe that competition significantly improves patient benefits as long as patients are able to respond to the quality provided. For those patients, who are not able to choose a physician, competition even decreases the patient benefit compared to a situation without competition. This decrease is in contrast to our theoretical prediction implying no change in benefits for passive patients. Deviations from patient-optimal treatment are highest for passive patients in need of a low quantity of medical services. With repetition, both, the positive effects of competition for active patients as well as the negative effects of competition for passive patients become more pronounced. Our results imply that competition can not only improve but also worsen patient outcome and that patients’ responsiveness to quality is decisive. AU - Brosig-Koch, Jeannette AU - Hehenkamp, Burkhard AU - Kokot, Johanna ID - 44092 JF - Health Economics KW - physician competition KW - patient characteristics KW - heterogeneity in quality responses KW - fee-for-service KW - laboratory experiment TI - Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics ER - TY - GEN AB - We consider a model where for-profit providers compete in quality in a price-regulated market that has been opened to competition, and where the incumbent is located at the center of the market, facing high costs of relocation. The model is relevant in markets such as public health care, education and schooling, or postal services. We find that, when the regulated price is low or intermediate, the entrant strategically locates towards the corner of the market to keep the incumbent at the low monopoly quality level. For a high price, the entrant locates at the corner of the market and both providers implement higher quality compared to a monopoly. In any case, the entrant implements higher quality than the incumbent provider. Social welfare is always higher in a duopoly if the cost of quality is low. For higher cost levels welfare is non-monotonic in the price and it can be optimal to the regulator not to use its entire budget. Therefore, the welfare effect of entry depends on the price and the size of the entry cost, and the regulator should condition the decision to allow entry on an assessment of the entry cost. AU - Hehenkamp, Burkhard AU - Kaarbøe, Oddvar M. ID - 44093 KW - Quality competition KW - Price regulation KW - Location choice KW - Product differentiation TI - Price Regulation, Quality Competition and Location Choice with Costly Relocation 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 - JOUR AU - Maack, Marten ID - 44077 IS - 3 JF - Operations Research Letters KW - Applied Mathematics KW - Industrial and Manufacturing Engineering KW - Management Science and Operations Research KW - Software SN - 0167-6377 TI - Online load balancing on uniform machines with limited migration VL - 51 ER - TY - GEN AU - Mamedov, Tural AU - Schleicher, Eckhard AU - Schubert, Markus AU - Ehlert, Thomas AU - Kenig, Eugeny Y. AU - Hampel, Uwe ID - 44096 TI - Experimental analysis of ship motion effects on the performance of an absorption column equipped with structured packings ER - TY - GEN AU - Ehlert, Thomas AU - Mamedov, Tural AU - Schubert, Markus AU - Kenig, Eugeny Y. ID - 44094 TI - Charakterisierung des Einflusses neigungsinduzierter Strömungsformen mit dem Ansatz der hydrodynamsichen Analogie ER - TY - GEN AU - Ehlert, Thomas AU - Lutters, Nicole AU - Kenig, Eugeny Y. ID - 44095 TI - Modellierung des Randspalts in Strukturpackungskolonnen mit dem Ansatz der hydrodynamischen Analogien ER - TY - JOUR AU - Jende, Yvonne Kristin ID - 44137 JF - Zeitschrift für Kanada-Studien SN - 0944-7008 TI - "The Future of Canadian Studies: On Plowing a Lonely Furrow." VL - 43 ER - TY - BOOK AU - Bauer, Anna Brigitte ID - 44083 SN - 978-3-8325-5625-9 TI - Experimentelle Kompetenz Physikstudierender. Entwicklung und erste Erprobung eines performanzorientierten Kompetenzstrukturmodells unter Nutzung qualitativer Methoden VL - 352 ER - TY - GEN AU - Beule, Felix AU - Schmelzle, Lars AU - Teutenberg, Dominik AU - Possart, Gunnar AU - Meschut, Gerson AU - Mergheim, Julia ID - 44181 T2 - 23. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung ER - TY - GEN AU - Schürmann, Patrick ID - 43374 TI - A Formal Comparison of Advanced Digital Signature Primitives ER - TY - CONF AU - Kowatz, Jannik AU - Teutenberg, Dominik AU - Meschut, Gerson ID - 44183 T2 - 23. Kolloquium Gemeinsame Forschung in der Klebtechnik TI - Weiterentwicklung der induktiven Schnellhärtung von Klebverbindungen für robuste Fertigungsprozesse unter Berücksichtigung von serienrelevanten Einflussfaktoren ER - TY - JOUR AB - Microcellular wood fiber reinforced polymers offer the possibility to reduce the use of fossil raw materials. In particular, thick-walled structures with thicknesses greater than 6 mm offer a high potential for weight savings. This study investigates the cell structures and mechanical properties of injection-molded test specimens. The influence of different thicknesses (6–10 mm) along with different chemical blowing agents (endothermic, exothermic) with varying dosages (0–2 wt%) is analyzed. The investigations reveal that exothermic chemical blowing agents form finer cells consistently to thin-walled structures than endothermic ones. Higher foaming agent content leads to higher pore fractions, with many small cells coalescing into a large open-pore cell network. The mechanical properties depend mainly on the pore content of the sample. The specific tensile properties deteriorate with the use of chemical blowing agents (CFA), whereas the sandwich structure produced with compact edge layers has a positive influence on the specific flexural properties. AU - Moritzer, Elmar AU - Flachmann, Felix ID - 42515 IS - 3 JF - Journal of Cellular Plastics KW - Materials Chemistry KW - Polymers and Plastics KW - General Chemistry SN - 0021-955X TI - Morphological and mechanical properties of foamed thick-walled Wood-Plastic-Composite structures VL - 59 ER - TY - JOUR AU - Burmeister, Sascha Christian AU - Schryen, Guido ID - 42179 JF - Energy Systems TI - Distribution Network Optimization: Predicting computation times to design scenario analysis for network operators ER - TY - CONF AB - Abstract. Friction-spinning as an innovative incremental forming process enables large degrees of deformation in tube and sheet metal-forming due to a self-induced heat generation in the forming zone. This paper presents new process designs for energy and resource-efficient forming of gas cylinders by friction-spinning without the use of an external heat supply. The self-generated heat enables friction-spinning process to reduce the energy demand in the manufacture of gas cylinders, which are usually manufactured with external heat (mostly fossil fuels), by 95 %. Typical gas cylinder contours, such as flattened and spherical bottom ends and cylinder necks, are manufactured by friction-spinning of AW 6060 tubular profiles with specifically designed tool path strategies. It is shown that friction-spinning enables the manufacture of typical gas cylinder contours with sufficient wall thickness and the required gas tightness without the input of external heat. Thus, this process can contribute to an increase in the energy and resource efficiency of forming processes. AU - Dahms, Frederik AU - Homberg, Werner ID - 44035 SN - 2474-395X T2 - Materials Research Proceedings TI - Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning ER - TY - JOUR AB - The technical importance of paraffins as phase change materials (PCM) in heat storage systems increases. Knowledge on the thermal conductivity of paraffins is necessary for the design and optimization of heat storage systems. However, for most paraffins solely the thermal conductivity of the liquid state has been sufficiently investigated. For the solid state, precise thermal conductivity data are only known for a few paraffins, while only generalized values are available for the remainder, some of which contradict each other. In this study, a measurement setup based on the modified guarded hot plate method is developed. It is used to investigate the thermal conductivity of several paraffines in the solid state, including pure n-docosane and its compounds with different types and concentrations of graphite. For n-docosane in the solid state, the thermal conductivity is determined to be 0.49 W/(m K). A particle size of 200 μm with a spherical shape turns out to be optimal to increase the thermal conductivity. This allows the thermal conductivity of a compound with 10% graphite to increase by a factor of three compared to the pure paraffin. Furthermore, significant differences to thermal conductivity data from the literature are found. AU - Paul, Andreas AU - Baumhögger, Elmar AU - Dewerth, Mats-Ole AU - Hami Dindar, Iman AU - Sonnenrein, Gerrit AU - Vrabec, Jadran ID - 43391 JF - Journal of Thermal Analysis and Calorimetry KW - Physical and Theoretical Chemistry KW - Condensed Matter Physics SN - 1388-6150 TI - Thermal conductivity of solid paraffins and several n-docosane compounds with graphite ER - TY - CONF AB - Die für die Berechnung des Energieeffizienzindex von Haushaltskältegeräten benötigten Parameter werden durch Norm-Messungen im Neuzustand der Geräte bestimmt. Aus früheren Untersuchungen ist bekannt, dass durch verschiedene technische Alterungsmechanismen der Energieverbrauch über eine Produktlebensdauer von 18 Jahren um bis zu 33 % zunehmen kann. Ziel des vom BMWi geförderten Projekts ALGE war es, die verschie-denen Ursachen und Einflussgrößen für die Alterung von Haushaltskältegeräten zu ermitteln und eine Alterungs-funktion zu bestimmen, die den zeitlichen Verlauf des zunehmenden Energieverbrauchs beschreibt. In diesem Projekt wurde das Alterungsverhalten von Haushaltskältegeräten durch 100 Normenergieverbrauchs-messungen an 32 real gealterten Geräten untersucht. Aus den gewonnenen Ergebnissen konnte eine Alterungs-funktion bestimmt werden, die den Anstieg des Energieverbrauchs beschreibt. Alle untersuchten Geräte wurden an der Universität Paderborn im Neuzustand vermessen und nach einer Laufzeit von bis zu 21 Jahren erneut geprüft. Bereits nach einem zweijährigen Betrieb konnte ein Mehrverbrauch von bis zu 11 % festgestellt werden. Über die durchschnittliche Produktlebensdauer von Haushaltskältegeräten von ca. 16 Jahren steigert sich der Energieverbrauch um durchschnittlich 27 %. Im Rahmen des Projekts wurden verschiedene Systemkomponenten, wie Isolierung und Verdichter, hinsichtlich ihres Alterungsverhaltens untersucht. Bei dem im Gehäuse als Isolierung verwendeten PUR-Schaum konnte über einen Zeitraum von 31 Monaten ein Anstieg der Wärmeleitfähigkeit von 19,5 W/(m⋅K) auf 24,5 W/(m⋅K) festge-stellt werden. Zur Untersuchung der Alterung der Verdichter wurden zuvor auf einem Kalorimeterteststand ver-messene Verdichter in Geräte eingebaut. Nach einem zweijährigen Betrieb wurden diese Verdichter wieder aus-gebaut und erneut vermessen. Hierbei konnte keine Änderung des COP festgestellt werden. Zusätzlich zu den technischen Parametern wurde der Einfluss des Verbraucherverhaltens analysiert. Hier zeigte sich, dass bis zu 33 % des Gesamtenergieverbrauchs nach einer mehrjährigen Nutzungsdauer verbraucherinduziert sein können. AU - Paul, Andreas AU - Baumhögger, Elmar AU - Elsner, Andreas AU - Reineke, Michael AU - Kasper, Tina AU - Schumacher, Daniel AU - Vrabec, Jadran AU - Hüppe, Christian AU - Stamminger, Rainer AU - Hölscher, Heike AU - Stoll, Ragnar AU - Wagner, Hendrik AU - Gries, Ulrich AU - Becker, Wolfgang ID - 43394 KW - Haushaltskältegeräte KW - Energieverbrauch KW - Alterung KW - Verdichter KW - PUR-Schaum SN - 978-3-932715-55-6 TI - Alterungsmechanismen von Haushaltskältegeräten ER - TY - JOUR AB - Abstract The accessibility to rheological parameters for concrete is becoming more and more relevant. This is mainly related to the constantly emerging challenges, such as not only the development of high-strength concretes is progressing very fast but also the simulation of the flow behaviour is of high importance. The main problem, however, is that the rheological characterisation of fresh concrete is not possible via commercial rheometers. The so-called concrete rheometers provide valuable relative values for comparing different concretes, but they cannot measure absolute values. Therefore, we developed an adaptive coaxial concrete rheometer (ACCR) that allows the measurement of fresh concrete with particles up to d max = 5.5 mm {d}_{{\rm{\max }}}=5.5\hspace{.5em}{\rm{mm}} . The comparison of the ACCR with a commercial rheometer showed very good agreement for selected test materials (Newtonian fluid, shear thinning fluid, suspension, and yield stress fluid), so that self-compacting concrete was subsequently measured. Since these measurements showed a very high reproducibility, the rheological properties of the fresh concrete could be determined with high accuracy. The common flow models (Bingham (B), Herschel–Bulkley, modified Bingham (MB) models) were also tested for their applicability, with the Bingham and the modified Bingham model proving to be the best suitable ones. AU - Josch, Sebastian AU - Jesinghausen, Steffen AU - Schmid, Hans-Joachim ID - 43034 IS - 1 JF - Applied Rheology KW - Condensed Matter Physics KW - General Materials Science SN - 1617-8106 TI - Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete VL - 33 ER - TY - CONF AU - Jende, Yvonne Kristin ID - 44225 T2 - Solidarités. Réseaux – Convivialités – Confrontations/ Solidarities. Networks – Convivialities – Confrontations, 44. Annual Conference of the Association for Canadian Studies in German-Speaking Countries TI - Please Mind the Gap. Reconfiguring Solidarity through Space in Michael Nicoll Yahgulanaas' Haida Manga Art. ER - TY - JOUR AU - Rüther, Moritz Johannes AU - Klippstein, Sven Helge AU - Ponusamy, SathishKumar AU - Rüther, Torben AU - Schmid, Hans-Joachim ID - 43128 JF - Powder Technology KW - General Chemical Engineering SN - 0032-5910 TI - Flowability of polymer powders at elevated temperatures for additive manufacturing VL - 422 ER - TY - JOUR AU - Wippermann, Jan AU - Meschut, Gerson AU - Koschukow, Wikentji AU - Liebsch, Alexander AU - Gude, Maik AU - Minch, Steven AU - Kolbe, Björn ID - 39057 JF - Welding in the World KW - Metals and Alloys KW - Mechanical Engineering KW - Mechanics of Materials SN - 0043-2288 TI - Thermal influence of resistance spot welding on a nearby overmolded thermoplastic–metal joint ER - TY - JOUR AU - Wippermann, Jan AU - Koshukow, Wikentij AU - Liebsch, Alexander AU - Kolbe, Björn AU - Meschut, Gerson AU - Gude, Maik ID - 44232 JF - Tagungsband Münchener Leichtbauseminar 2022 TI - Influence of plasma coating pretreatment on the adhesion of thermoplastics to metals ER - TY - GEN AU - Ponusamy, SathishKumar AU - Schmid, Hans-Joachim ID - 44244 TI - Dynamisch-mechanische Polymerpartikelverrundung zur Verbesserung der Fließfähigkeit für das selektive Lasersintern ER - TY - CHAP AB - State education in honest tax payment can be understood as a facet of training in citizenship, i.e. as an attempt by the modern state to standardize the behavior of its citizens and to prevent deviations. Based on this Foucauldian understanding, this exploratory article examines tax education in the United States, Spain, and West Germany from the mid-1940s to the late 1980s. During this period, the USA asserted itself as the champion of tax education and Spain consistently tried to emulate this example, albeit with more modest means and different semantic strategies from as early as the 1960s, when it was still under a autoritarian regime. The FRG, however, completely discontinued its few early attempts at tax education from the mid-1950s onwards. Even during the economic crises and tax scandals of the 1970s, there was no relaunch of the programs. The article locates the reasons for this highly uneven development in the different ideal images of the citizen in the three states. AU - Schönhärl, Korinna AU - Düll, Nasrin AU - Ramírez Lugo , Nadya Melina ED - Sébastien, Guex ED - Hadrien, Buclin ID - 44249 T2 - Tax Evasion and Tax Havens since the Nineteenth Century TI - Tax Education After WWII: How Spain, the USA, and West Germany Tried to Make Their Citizens Pay Honestly ER - TY - JOUR AU - Behler, Felix ID - 44264 IS - 3 JF - Interdisciplinary Discourses, Education and Analysis (IDEA) SN - 2754-2416 TI - Recapturing Old England – Nostalgia, Aristo-Anglophilia, and the Historical Roots of ITV’s ‘Downton Abbey’ VL - 1 ER - TY - CONF AB - Abstract. Due to an increasing volume of shipments, there is a significant need for more delivery vehicles. One approach to reduce the associated increase in carbon dioxide (CO2) emissions is a new light weight design approach involving the substitution of conventional materials with glass fiber mat-reinforced thermoplastics (GMT) based on polypropylene (PP). The application of GMT by compression molding is a widely used process in the automotive industry. However, application in the commercial vehicle sector requires much larger dimensions, making it necessary to clarify whether the manufacturing process and material are suitable for semi-structural applications on this scale. To find this out, two replacement geometries are abstracted in this study and manufactured by varying the main manufacturing parameters. The feasibility can be demonstrated by recording and analyzing the resulting process variables and measuring the formed fiber distribution. At the end of the paper, recommendations are given for the production of GMT structures on the scale of commercial vehicles. AU - Lückenkötter, Julian AU - Leimbach, J.P. AU - Stallmeister, Tim AU - Marten, Thorsten AU - Tröster, Thomas ID - 44154 KW - Compression Molding KW - Fiber Content KW - Process Development KW - Lightweight Design T2 - Materials Research Proceedings TI - Feasibility Study of Compression Molding for Large Reinforcement Structures in the Commercial Vehicle Sector VL - 28 ER - TY - JOUR AB - 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. AU - Schwind, Bertram AU - Wu, Xia AU - Tiemann, Michael AU - Fabritius, Helge-Otto ID - 42679 IS - 3 JF - Journal of the Optical Society of America B KW - Atomic and Molecular Physics KW - and Optics KW - Statistical and Nonlinear Physics SN - 0740-3224 TI - Broadband Mie scattering effects by structural features of setae from the Saharan silver ant Cataglyphis bombycina VL - 40 ER - TY - JOUR AB - The production of hydrogen and the utilization of biomass for sustainable concepts of energy conversion and storage require gas sensors that discriminate between hydrogen (H2) and carbon monoxide (CO). Mesoporous copper–ceria (Cu–CeO2) materials with large specific surface areas and uniform porosity are prepared by nanocasting, and their textural properties are characterized by N2 physisorption, powder XRD, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The oxidation states of copper (Cu+, Cu2+) and cerium (Ce3+, Ce4+) are investigated by XPS. The materials are used as resistive gas sensors for H2 and CO. The sensors show a stronger response to CO than to H2 and low cross-sensitivity to humidity. Copper turns out to be a necessary component; copper-free ceria materials prepared by the same method show only poor sensing performance. By measuring both gases (CO and H2) simultaneously, it is shown that this behavior can be utilized for selective sensing of CO in the presence of H2. AU - Baier, Dominik AU - Priamushko, Tatiana AU - Weinberger, Christian AU - Kleitz, Freddy AU - Tiemann, Michael ID - 43457 IS - 4 JF - ACS Sensors KW - Fluid Flow and Transfer Processes KW - Process Chemistry and Technology KW - Instrumentation KW - Bioengineering SN - 2379-3694 TI - Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors VL - 8 ER - TY - CONF AB - Abstract. The combination of incremental sheet metal forming and high-speed forming offers new possibilities for flexible forming processes in the production of large sheet metal components of increased complexity with relatively low forming energies. In this paper, the general feasibility and process differences between the pulse-driven high-speed forming technologies of electrohydraulic and electromagnetic forming were investigated. An example component made of EN AW 6016 aluminum sheet metal was thus formed incrementally by both processes and the forming result evaluated by an optical 3D measurement system. For this purpose, a forming strategy for electromagnetic incremental forming (EMIF) was developed, tested and adapted to the electrohydraulic incremental forming process (EHIF). The discharge energy, the tool displacement and the pressure field of the forming zone were determined as relevant parameters for the definition of an adequate tool path strategy. It was found that the EHIF process is less affected by larger distances between the tool and the blank, while this is a critical variable for force application to the component during EMIF. On the other hand, the more uniform pressure distribution of the EMIF process is advantageous for forming large steady component areas. AU - Holzmüller, Maik AU - Linnemann, Maik AU - Homberg, Werner AU - Psyk, Verena AU - Kräusel, Verena AU - Kroos, Janika ID - 43044 KW - Incremental Sheet Forming KW - Aluminium KW - High-Speed Forming SN - 2474-395X T2 - Materials Research Proceedings TI - Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming VL - 25 ER - TY - JOUR AB - The pressure fields generated by two simultaneous discharges have not been investigated on any notable scale for the electrohydraulic impulse forming method. In this study, the synchronicity of two discharges is ensured by the sequential connection of two wires mounted in two spark gaps in a common volume of liquid. The objective is to experimentally confirm the equilibrium of the energies evolved in two spark gaps by means of pressure measurements. In addition, multipoint membrane pressure gauges demonstrated the feasibility of easily recording detailed pressure maps. Based on the membrane deformation mechanism and material strengthening under static and impulse conditions, the processing procedure is further developed so as to achieve better accuracy in the determination of pressure field parameters. The practical equality of the pressure fields on the left and right halves of the flat-loaded area confirms the equality of energies evolved in the two spark gaps. The direct shock waves create zones with the most intensive loading. These results provide a basis for the development of new electrohydraulic technologies involving the application of two simultaneous discharges with equal energy and pressure parameters. AU - Knyazyev, Mykhaylo AU - Holzmüller, Maik AU - Homberg, Werner ID - 43045 IS - 1 JF - Journal of Manufacturing and Materials Processing KW - impulse KW - forming KW - electrohydraulic KW - discharge KW - wire KW - pressure gauge KW - pressure field SN - 2504-4494 TI - Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires VL - 7 ER - TY - JOUR AU - Neumann, Phillip ID - 44321 IS - 5 JF - Zeitschrift für Heilpädagogik KW - Inklusion KW - Sonderpädagogik KW - Bildung KW - Bildungsstudien KW - Integration SN - 0513-9066 TI - Studien zu Schulleistungen und ihre Aufbereitung VL - 74 ER - TY - CONF AU - Hami Dindar, Iman AU - Lutters, Nicole AU - Kenig, Eugeny ID - 44320 T2 - Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Adsoprtion TI - Wässrige Glucosaminlösung als neues Lösungsmittel zur CO2-Abscheidung ER - TY - CONF AB - State estimation when only a partial model of a considered system is available remains a major challenge in many engineering fields. This work proposes a joint, square-root unscented Kalman filter to estimate states and model uncertainties simultaneously by linear combinations of physics-motivated library functions. Using a sparsity promoting approach, a selection of those linear combinations is chosen and thus an interpretable model can be extracted. Results indicate a small estimation error compared to a traditional square-root unscented Kalman filter and exhibit the enhancement of physically meaningful models. AU - Götte, Ricarda-Samantha AU - Timmermann, Julia ID - 34171 IS - 1 KW - joint estimation KW - unscented transform KW - Kalman filter KW - sparsity KW - data-driven KW - compressed sensing T2 - 12th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2022) TI - Estimating States and Model Uncertainties Jointly by a Sparsity Promoting UKF VL - 56 ER - TY - JOUR AB - Room temperature sodium-sulfur (RT Na-S) batteries are considered potential candidates for stationary power storage applications due to their low cost, broad active material availability and low toxicity. Challenges, such as high volume expansion of the S-cathode upon discharge, low electronic conductivity of S as active material and herewith limited rate capability as well as the shuttling of polysulfides (PSs) as intermediates often impede the cycle stability and practical application of Na-S batteries. Sulfurized poly(acrylonitrile) (SPAN) inherently inhibits the shuttling of PSs and shows compatibility with carbonate-based electrolytes, however, its exact redox mechanism remained unclear to date. Herein, we implement a commercially available and simple electrolyte into the Na-SPAN cell chemistry and demonstrate its high rate and cycle stability. Through the application of in situ techniques utilizing electronic impedance spectroscopy (EIS) and X-ray absorption spectroscopy (XAS) at different depths of charge and discharge, an insight into SPAN’s redox chemistry is obtained. AU - Kappler, Julian AU - Tonbul, Güldeniz AU - Schoch, Roland AU - Murugan, Saravanakumar AU - Nowakowski, Michał AU - Lange, Pia Lena AU - Klostermann, Sina Vanessa AU - Bauer, Matthias AU - Schleid, Thomas AU - Kästner, Johannes AU - Buchmeiser, Michael Rudolf ID - 40981 IS - 1 JF - Journal of The Electrochemical Society KW - Materials Chemistry KW - Electrochemistry KW - Surfaces KW - Coatings and Films KW - Condensed Matter Physics KW - Renewable Energy KW - Sustainability and the Environment KW - Electronic KW - Optical and Magnetic Materials SN - 0013-4651 TI - Understanding the Redox Mechanism of Sulfurized Poly(acrylonitrile) as Highly Rate and Cycle Stable Cathode Material for Sodium-Sulfur Batteries VL - 170 ER - TY - JOUR AB - The success of engineering complex technical systems is determined by meeting customer requirements and institutional regulations. One example relevant to the automobile industry is the United Nations Economic Commission of Europe (UN ECE), which specifies the homologation of automobile series and requires proof of traceability. The required traceability can be achieved by modeling system artifacts and their relations in a consistent, seamless model—an effect-chain model. Currently, no in-depth methodology exists to support engineers in developing certification-compliant effect-chain models. For this purpose, a new methodology for certification-compliant effect-chain modeling was developed, which includes extensions of an existing method, suitable models, and tools to support engineers in the modeling process. For evaluation purposes, applicability is proven based on the experience of more than 300 workshops at an automotive OEM and an automotive supplier. The following case example is chosen to demonstrate applicability: the development of a window lifter that has to meet the demands of UN ECE Regulations R156 and R21. Results indicate multiple benefits in supporting engineers with the certification-compliant modeling of effect chains. Three benefits are goal-oriented modeling to reduce the necessary modeling capacity, increasing model quality by applying information quality criteria, and the potential to reduce costs through automatable effect-chain analyses for technical changes. Further, companies in the automotive and other industries will benefit from increased modeling capabilities that can be used for architecture modeling and to comply with other regulations such as ASPICE or ISO 26262. AU - Gräßler, Iris AU - Wiechel, Dominik AU - Koch, Anna-Sophie AU - Sturm, Tim AU - Markfelder, Thomas ID - 44382 IS - 3 JF - Systems KW - Information Systems and Management KW - Computer Networks and Communications KW - Modeling and Simulation KW - Control and Systems Engineering KW - Software SN - 2079-8954 TI - Methodology for Certification-Compliant Effect-Chain Modeling VL - 11 ER - TY - GEN AU - Tonbul, Güldeniz AU - Kappler, Julian AU - Murugan, Saravanakumar AU - Schoch, Roland AU - Nowakowski, Michal AU - Lange, Pia AU - Bauer, Matthias AU - Buchmeiser, Michael R. ID - 44380 TI - Characterization of Na-S Battery System Using X-ray Absorption Spectroscopy ER - TY - CONF AB - The development of autonomous vehicles and their introduction in urban traffic offer many opportunities for traffic improvements. In this paper, an approach for a future traffic control system for mixed autonomy traffic environments is presented. Furthermore, a simulation framework based on the city of Paderborn is introduced to enable the development and examination of such a system. This encompasses multiple elements including the road network itself, traffic lights, sensors as well as methods to analyse the topology of the network. Furthermore, a procedure for traffic demand generation and routing is presented based on statistical data of the city and traffic data obtained by measurements. The resulting model can receive and apply the generated control inputs and in turn generates simulated sensor data for the control system based on the current system state. AU - Link, Christopher AU - Malena, Kevin AU - Gausemeier, Sandra AU - Trächtler, Ansgar ID - 44390 KW - Traffic Simulation KW - Traffic Control KW - Car2X KW - Mixed Autonomy KW - Autonomous Vehicles KW - SUMO KW - Sensor Simulation KW - Traffic Demand Generation KW - Routing KW - Traffic Lights KW - Graph Analysis KW - Traffic Observer SN - 978-989-758-652-1 T2 - Proceedings of the 9th International Conference on Vehicle Technology and Intelligent Transport Systems TI - Simulation Environment for Traffic Control Systems Targeting Mixed Autonomy Traffic Scenarios ER - TY - CONF AU - Althaus, Maike AU - Müller, Michelle AU - Vorbohle, Christian AU - Kundisch, Dennis ID - 44444 T2 - Proceedings of the International Conference on Challenges in Managing Smart Products and Services (CHIMSPAS 2023) TI - Business Models for Cultural Event Platforms – A Taxonomy Approach ER - TY - CONF AU - Laux, Florian AU - Poniatowski, Martin AU - Kundisch, Dennis ID - 44053 T2 - Proceedings of the 31st European Conference on Information Systems (ECIS) TI - May I have your Attention, please? – The Interaction between Attention Screening and Reputation on Crowdworking Platforms ER - TY - GEN AU - Neukötter, Moritz AU - Jesinghausen, Steffen AU - Schmid, Hans-Joachim ID - 44103 TI - Particles as Seeds for Instabilities in Uniaxially Elongated Polymer Suspension Filaments (Presentation) ER - TY - JOUR AU - Küster, Christine AU - Klünder, Nina AU - Wagenknecht, Inga ID - 44477 JF - Hauswirtschaft und Wissenschaft SN - 2626-0913 TI - Haushaltswissenschaft – Eine Diskussionsgrundlage VL - 71 ER - TY - CHAP AU - Meine, Sabine AU - Otto, Arnold AU - Süßmann, Johannes ID - 35063 SN - 978-3-8260-7218-5 T2 - Musiklandschaften zwischen Rhein und Weser. Pluralisierung und Verflechtung entlang des Hellwegs in der Frühen Neuzeit. Unter Mitarbeit v. Markus Lauert TI - Musiklandschaften zwischen Rhein und Weser – Einführung ER - TY - CONF AU - Gharibian, Sevag AU - Watson, James AU - Bausch, Johannes ID - 20841 T2 - Proceedings of the 40th International Symposium on Theoretical Aspects of Computer Science (STACS) TI - The Complexity of Translationally Invariant Problems beyond Ground State Energies VL - 254 ER - TY - GEN AB - Extending the notion of maxcut, the study of the frustration index of signed graphs is one of the basic questions in the theory of signed graphs. Recently two of the authors initiated the study of critically frustrated signed graphs. That is a signed graph whose frustration index decreases with the removal of any edge. The main focus of this study is on critical signed graphs which are not edge-disjoint unions of critically frustrated signed graphs (namely non-decomposable signed graphs) and which are not built from other critically frustrated signed graphs by subdivision. We conjecture that for any given k there are only finitely many critically k-frustrated signed graphs of this kind. Providing support for this conjecture we show that there are only two of such critically 3-frustrated signed graphs where there is no pair of edge-disjoint negative cycles. Similarly, we show that there are exactly ten critically 3-frustrated signed planar graphs that are neither decomposable nor subdivisions of other critically frustrated signed graphs. We present a method for building non-decomposable critically frustrated signed graphs based on two given such signed graphs. We also show that the condition of being non-decomposable is necessary for our conjecture. AU - Cappello, Chiara AU - Naserasr, Reza AU - Steffen, Eckhard AU - Wang, Zhouningxin ID - 44501 T2 - arXiv:2304.10243 TI - Critically 3-frustrated signed graphs ER - TY - JOUR AU - Tapio, Kosti AU - Kielar, Charlotte AU - Parikka, Johannes M. AU - Keller, Adrian AU - Järvinen, Heini AU - Fahmy, Karim AU - Toppari, J. Jussi ID - 42517 JF - Chemistry of Materials KW - Materials Chemistry KW - General Chemical Engineering KW - General Chemistry SN - 0897-4756 TI - Large-Scale Formation of DNA Origami Lattices on Silicon VL - 35 ER - TY - JOUR AU - Pothineni, Bhanu Kiran AU - Keller, Adrian ID - 42518 JF - Advanced NanoBiomed Research KW - General Medicine SN - 2699-9307 TI - Nanoparticle‐Based Formulations of Glycopeptide Antibiotics: A Means for Overcoming Vancomycin Resistance in Bacterial Pathogens? VL - 3 ER - TY - JOUR AU - Hanke, Marcel AU - Tomm, Emilia AU - Grundmeier, Guido AU - Keller, Adrian ID - 44503 JF - ChemBioChem KW - Organic Chemistry KW - Molecular Biology KW - Molecular Medicine KW - Biochemistry SN - 1439-4227 TI - Effect of Ionic Strength on the Thermal Stability of DNA Origami Nanostructures ER - TY - JOUR AU - Linko, Veikko AU - Keller, Adrian ID - 44504 JF - Small KW - Biomaterials KW - Biotechnology KW - General Materials Science KW - General Chemistry SN - 1613-6810 TI - Stability of DNA Origami Nanostructures in Physiological Media: The Role of Molecular Interactions ER - TY - THES AU - Kruse, Anne ID - 44509 SN - 978-3-8440-8955-4 TI - Entwicklung einer Methode zur Integration der Additiven Fertigung in die Serienproduktion am Beispiel des Lasersinterns VL - 27 ER - TY - GEN AB - For open world applications, deep neural networks (DNNs) need to be aware of previously unseen data and adaptable to evolving environments. Furthermore, it is desirable to detect and learn novel classes which are not included in the DNNs underlying set of semantic classes in an unsupervised fashion. The method proposed in this article builds upon anomaly detection to retrieve out-of-distribution (OoD) data as candidates for new classes. We thereafter extend the DNN by $k$ empty classes and fine-tune it on the OoD data samples. To this end, we introduce two loss functions, which 1) entice the DNN to assign OoD samples to the empty classes and 2) to minimize the inner-class feature distances between them. Thus, instead of ground truth which contains labels for the different novel classes, the DNN obtains a single OoD label together with a distance matrix, which is computed in advance. We perform several experiments for image classification and semantic segmentation, which demonstrate that a DNN can extend its own semantic space by multiple classes without having access to ground truth. AU - Uhlemeyer, Svenja AU - Lienen, Julian AU - Hüllermeier, Eyke AU - Gottschalk, Hanno ID - 44512 T2 - arXiv:2305.00983 TI - Detecting Novelties with Empty Classes ER - TY - CONF AU - Wurst, Johanna AU - Steinhoff, Timon AU - Mozgova, Iryna AU - Hassel, Thomas AU - Lachmayer, Roland ID - 44521 TI - Aspects of a Sustainability Focused Comparison of the Wire Arc Additive Manufacturing (WAAM) and the Laser Powder Bed Fusion (LPBF) Process ER - TY - CONF AU - Wurst, Johanna AU - Rosemann, Daniel AU - Mozgova, Iryna AU - Lachmayer, Roland ID - 44522 TI - Concept and Implementation of a Student Design Project for the Development of Sustainable Products ER - TY - JOUR AU - Paradies, Jan ID - 44523 IS - 7 JF - Accounts of Chemical Research KW - General Medicine KW - General Chemistry SN - 0001-4842 TI - Structure–Reactivity Relationships in Borane-Based FLP-Catalyzed Hydrogenations, Dehydrogenations, and Cycloisomerizations VL - 56 ER - TY - BOOK ED - Meier-Gräwe, Uta ED - Praetorius, Ina ED - Tecklenburg, Feline ID - 44524 SN - 9783847425922 TI - Wirtschaft neu ausrichten. Care-Initiativen in Deutschland, Österreich und der Schweiz. ER - TY - JOUR AB - IntroductionExergames are increasingly used in rehabilitation settings for older adults to train physical and cognitive abilities. To meet the potential that exergames hold, they need to be adapted to the individual abilities of the player and their training objectives. Therefore, it is important to know whether and how game characteristics affect their playing. The aim of this study is to investigate the effect of two different kinds of exergame (step game and balance game) played at two difficulty levels on brain activity and physical activity.MethodsTwenty-eight older independently living adults played two different exergames at two difficulty levels each. In addition, the same movements as during gaming (leaning sideways with feet in place and stepping sideways) were performed as reference movements. Brain activity was recorded using a 64-channel EEG system to assess brain activity, while physical activity was recorded using an accelerometer at the lower back and a heart rate sensor. Source-space analysis was applied to analyze the power spectral density in theta (4 Hz–7 Hz) and alpha-2 (10 Hz–12 Hz) frequency bands. Vector magnitude was applied to the acceleration data.ResultsFriedman ANOVA revealed significantly higher theta power for the exergaming conditions compared to the reference movement for both games. Alpha-2 power showed a more diverse pattern which might be attributed to task-specific conditions. Acceleration decreased significantly from the reference movement to the easy condition to the hard condition for both games.DiscussionThe results indicate that exergaming increases frontal theta activity irrespective of type of game or difficulty level, while physical activity decreases with increasing difficulty level. Heart rate was found to be an inappropriate measure in this population older adults. These findings contribute to understanding of how game characteristics affect physical and cognitive activity and consequently need to be taken into account when choosing appropriate games and game settings for exergame interventions. AU - Müller, Helen AU - Baumeister, Jochen AU - Bardal, Ellen Marie AU - Vereijken, Beatrix AU - Skjæret-Maroni, Nina ID - 44545 JF - Frontiers in Aging Neuroscience KW - Cognitive Neuroscience KW - Aging SN - 1663-4365 TI - Exergaming in older adults: the effects of game characteristics on brain activity and physical activity VL - 15 ER - TY - CHAP AU - Labusch, Amelie AU - Eickelmann, Birgit ED - Keane, T. ED - Fluck, A. E. ID - 43170 SN - 9783031219696 T2 - Teaching coding in K-12 schools: Research and application TI - Learning Computational Thinking in Secondary School (Year 8) in Germany in International Comparison: Results from ICILS 2018 ER - TY - CHAP AU - Schulze, Johanna AU - Drossel, Kerstin AU - Eickelmann, Birgit ED - Irion, T. ED - Böttinger, T. ED - Kammerl, R. ID - 44626 T2 - Professionalisierung für digitale Bildung im Grundschulalter - Ergebnisse des Forschungsprojekts P3DiG TI - Die inhaltliche Ausgestaltung schulischer Medienkonzepte als Gelingensbedingung digitalisierungsbezogener Schulentwicklungsprozesse ER - TY - GEN AU - Gerick, J. AU - Eickelmann, Birgit AU - Panten, B. AU - Rothärmel, A. AU - Rau, M. AU - Gottschalk, T. ID - 44627 TI - Abschlussbericht zum Forschungsprojekt ‚Gelingensbedingungen und Transfer von erfolgreichen Digitalisierungsprozessen an Schulen in Nordrhein-Westfalen (GuTe DigiSchulen NRW) ER - TY - GEN AU - Gerick, J. AU - Eickelmann, Birgit AU - Rau, M. AU - Panten, B. AU - Rothärmel, A. AU - Gottschalk, T. ID - 44628 TI - Digitalisierungsbezogene Schulentwicklungsprozesse erfolgreich gestalten. Handreichung für die schulische Arbeit zu den Ergebnissen des Forschungsprojekts GuTe DigiSchulen NRW. ER - TY - JOUR AU - Kowatz, Jannik AU - Teutenberg, Dominik AU - Meschut, Gerson ID - 35536 JF - International Journal of Adhesion and Adhesives SN - 0143-7496 TI - Optimization of inductive fast-curing of epoxy adhesive by model-based kinetics VL - 124 ER - TY - GEN AU - Salten, Alexander Heinrich Johannes AU - Al Trjman, Mohamad AU - Meschut, Gerson AU - Kenig, Eugeny Y. ID - 44228 TI - Simulation des „viscous fingering“ Effektes in Klebverbindungen ER - TY - GEN AU - Al Trjman, Mohamad AU - Meschut, Gerson AU - Salten, Alexander Heinrich Johannes AU - Kenig, Eugeny Y. ID - 44227 TI - Methodenentwicklung zur Simulation des Viscous Fingering in Klebverbindungen von stahlintensiven Mischbaustrukturen ER - TY - JOUR AB - With enhancing digitalization, condition monitoring is used in an increasing number of application fields across various industrial sectors. By its application, increased reliability as well as reduced risks and costs can be achieved. Based on different approaches, technical systems are monitored and measured data is analyzed to enable condition-based or predictive maintenance. To this end, machine learning approaches are usually implemented to diagnose the health states or predict the health index of the monitored system. However, these trained models are often black-box models, not intuitively explainable for a human. To overcome this shortcoming, a model-based approach based on physics is developed for piezoelectric bending actuators. Such a model enables a transparent representation of the system. Moreover, the model-based approach is extended by a parameter-estimation to account for sudden changes in behavior e. g. caused by occurring cracks. AU - Bender, Amelie ID - 44672 JF - Sensors and Actuators A: Physical KW - Condition Monitoring KW - Model-based approach Diagnostics KW - Varying conditions KW - Explainability KW - Piezoelectric bending actuators SN - 0924-4247 TI - Model-based condition monitoring of piezoelectric bending actuators VL - 357 ER - TY - JOUR AB - Entwicklungsprojekte stehen in einem Spannungsfeld von Volatilität, Unsicherheit, Komplexität und Ambiguität (VUCA). Resilient Requirements Engineering (RRE) ist ein vielversprechender Ansatz, diesen Rahmenbedingungen gerecht zu werden und erfolgreich zu entwickeln. Es werden Methoden aus den drei Innovationsfeldern des RRE – Vorausschau, Effizienz und Nachhaltigkeit – angewendet, um Effizienzpotenziale in der Produktentwicklung zu nutzen und frühzeitig Nachhaltigkeitsdimensionen in der Ermittlung von Stakeholderbedürfnissen zu verankern. AU - Gräßler, Iris AU - Oleff, Christian AU - Preuß, Daniel AU - Koch, Anna-Sophie ID - 44687 IS - 4 JF - Zeitschrift für wirtschaftlichen Fabrikbetrieb KW - Management Science and Operations Research KW - Strategy and Management KW - General Engineering SN - 2511-0896 TI - Resilient Requirements Engineering VL - 118 ER - TY - CONF AU - Ahmed, Qazi Arbab AU - Awais, Muhammad AU - Platzner, Marco ID - 44194 T2 - The 24th International Symposium on Quality Electronic Design (ISQED'23), San Francisco, Califorina USA TI - MAAS: Hiding Trojans in Approximate Circuits ER - TY - GEN AU - Schweichhart, Jonas ID - 44735 TI - Minimum Edge Cuts in Overlay Networks ER - TY - CHAP AU - Castenow, Jannik AU - Harbig, Jonas AU - Meyer auf der Heide, Friedhelm ID - 44769 SN - 0302-9743 T2 - Lecture Notes in Computer Science TI - Unifying Gathering Protocols for Swarms of Mobile Robots ER - TY - GEN AU - Temborius, Fiona AU - Neukötter, Moritz ID - 44101 TI - Polymere unter Dehnung: Untersuchung der Filamententstehung von Polymerblends und deren Instabilitätsentstehung durch Partikeln ER - TY - GEN AU - Almohammad, Ahmad AU - Neukötter, Moritz ID - 42997 TI - Untersuchung dehnrheologischer Eigenschaften - Suspensionen auf Basis von Polymerlösungen ER - TY - JOUR AB - Dispersion is present in every optical setup and is often an undesired effect, especially in nonlinear-optical experiments where ultrashort laser pulses are needed. Typically, bulky pulse compressors consisting of gratings or prisms are used to address this issue by precompensating the dispersion of the optical components. However, these devices are only able to compensate for a part of the dispersion (second-order dispersion). Here, we present a compact pulse-shaping device that uses plasmonic metasurfaces to apply an arbitrarily designed spectral phase delay allowing for a full dispersion control. Furthermore, with specific phase encodings, this device can be used to temporally reshape the incident laser pulses into more complex pulse forms such as a double pulse. We verify the performance of our device by using an SHG-FROG measurement setup together with a retrieval algorithm to extract the dispersion that our device applies to an incident laser pulse. AU - Geromel, René AU - Georgi, Philip AU - Protte, Maximilian AU - Lei, Shiwei AU - Bartley, Tim AU - Huang, Lingling AU - Zentgraf, Thomas ID - 44044 IS - 8 JF - Nano Letters KW - Mechanical Engineering KW - Condensed Matter Physics KW - General Materials Science KW - General Chemistry KW - Bioengineering SN - 1530-6984 TI - Compact Metasurface-Based Optical Pulse-Shaping Device VL - 23 ER - TY - JOUR AB - Hydrothermal carbonization (HTC) is an efficient thermochemical method for the conversion of organic feedstock to carbonaceous solids. HTC of different saccharides is known to produce microspheres (MS) with mostly Gaussian size distribution, which are utilized as functional materials in various applications, both as pristine MS and as a precursor for hard carbon MS. Although the average size of the MS can be influenced by adjusting the process parameters, there is no reliable mechanism to affect their size distribution. Our results demonstrate that HTC of trehalose, in contrast to other saccharides, results in a distinctly bimodal sphere diameter distribution consisting of small spheres with diameters of (2.1 ± 0.2) μm and of large spheres with diameters of (10.4 ± 2.6) μm. Remarkably, after pyrolytic post-carbonization at 1000 °C the MS develop a multimodal pore size distribution with abundant macropores > 100 nm, mesopores > 10 nm and micropores < 2 nm, which were examined by small-angle X-ray scattering and visualized by charge-compensated helium ion microscopy. The bimodal size distribution and hierarchical porosity provide an extraordinary set of properties and potential variables for the tailored synthesis of hierarchical porous carbons, making trehalose-derived hard carbon MS a highly promising material for applications in catalysis, filtration, and energy storage devices. AU - Wortmann, Martin AU - Keil, Waldemar AU - Diestelhorst, Elise AU - Westphal, Michael AU - Haverkamp, René AU - Brockhagen, Bennet AU - Biedinger, Jan AU - Bondzio, Laila AU - Weinberger, Christian AU - Baier, Dominik AU - Tiemann, Michael AU - Hütten, Andreas AU - Hellweg, Thomas AU - Reiss, Günter AU - Schmidt, Claudia AU - Sattler, Klaus AU - Frese, Natalie ID - 44837 IS - 21 JF - RSC Advances KW - General Chemical Engineering KW - General Chemistry SN - 2046-2069 TI - Hard carbon microspheres with bimodal size distribution and hierarchical porosity via hydrothermal carbonization of trehalose VL - 13 ER - TY - GEN AU - Bünder, Dirk AU - Neukötter, Moritz ID - 42999 TI - Theoretische Beschreibung des Polymerverhaltens in Polymerlösungen und - schmelzen: Simulationen anhand des Rolie-Poly-Modells ER - TY - GEN AU - Al Mamoun, Mohamed AU - Neukötter, Moritz ID - 42995 TI - Evaluation of self-built low-budget particle sensors (Study Project) ER - TY - BOOK AU - Teichert, Jeannine ID - 44246 TI - Digital occupants – Wie digitale Medien die kommunikative Aushandlung von Freundschaften verändern ER - TY - JOUR AU - Teichert, Jeannine AU - Meister, Dorothee M. ID - 44247 JF - MedienPädagogik TI - Mediale Identitätsaushandlungen deutscher MigrantInnen im Zuge des Brexit ER - TY - CHAP AU - Kruse, Iris AU - Maubach, Bernd AU - Tönsing, Johanna ED - Kruse, Iris ED - Josting, Petra ID - 42183 SN - 978-3-96848-094-7 T2 - Salah Naoura TI - "Lesungen vor Kindern sind für mich Theater" / Salah Naouras Sicht auf Wirkliches und Mögliches in Autor*innenlesungen für Kinder in der Schule VL - 12 ER - TY - CHAP AU - Kruse, Iris AU - Schäfer, Luisa Maria ED - Kruse, Iris ED - Josting, Petra ID - 42182 SN - 978-3-96848-094-7 T2 - Salah Naoura TI - Held*innenträume. Superheldinnen und Superhelden selbst erdacht / Paderborner Grundschulkinder werden auf die Begegnung mit Salah Naoura vorbereitet VL - 12 ER - TY - BOOK ED - Kruse, Iris ED - Josting, Petra ID - 42178 SN - 978-3-96848-094-7 TI - Salah Naoura VL - 12 ER - TY - JOUR AB - Ancestral reconstruction is a classic task in comparative genomics. Here, we study the genome median problem, a related computational problem which, given a set of three or more genomes, asks to find a new genome that minimizes the sum of pairwise distances between it and the given genomes. The distance stands for the amount of evolution observed at the genome level, for which we determine the minimum number of rearrangement operations necessary to transform one genome into the other. For almost all rearrangement operations the median problem is NP-hard, with the exception of the breakpoint median that can be constructed efficiently for multichromosomal circular and mixed genomes. In this work, we study the median problem under a restricted rearrangement measure called c4-distance, which is closely related to the breakpoint and the DCJ distance. We identify tight bounds and decomposers of the c4-median and develop algorithms for its construction, one exact ILP-based and three combinatorial heuristics. Subsequently, we perform experiments on simulated data sets. Our results suggest that the c4-distance is useful for the study the genome median problem, from theoretical and practical perspectives. AU - Silva, Helmuth O.M. AU - Rubert, Diego P. AU - Araujo, Eloi AU - Steffen, Eckhard AU - Doerr, Daniel AU - Martinez, Fábio V. ID - 44857 IS - 3 JF - RAIRO - Operations Research KW - Management Science and Operations Research KW - Computer Science Applications KW - Theoretical Computer Science SN - 0399-0559 TI - Algorithms for the genome median under a restricted measure of rearrangement VL - 57 ER - TY - GEN AU - Ma, Yulai AU - Mattiolo, Davide AU - Steffen, Eckhard AU - Wolf, Isaak Hieronymus ID - 44859 T2 - arXiv:2305.08619 TI - Sets of r-graphs that color all r-graphs ER - TY - JOUR AU - Lenz, Peter AU - Mahnken, Rolf ID - 44888 IS - 1 JF - PAMM KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics SN - 1617-7061 TI - Thermo‐chemo‐mechanical modelling of a curing process combined with mean‐field homogenization methods at large strains VL - 22 ER - TY - CONF AU - Wolters, Dennis AU - Engels, Gregor ID - 34294 SN - 2184-4348 T2 - MODELSWARD'23 TI - Model-driven Collaborative Design of Professional Education Programmes With Extended Online Whiteboards ER - TY - GEN AU - Cheng, Chun AU - Song, Chunlei AU - Mahnken, Rolf AU - Yuan, Zhipeng AU - Yu, Liang AU - Ju, Xiaozhe ID - 44887 TI - A Non-Linear Mean-Field Debonding Model at Large Strains for the Analysis of Fibre Kinking in Ud Composites ER - TY - JOUR AU - Westermann, Hendrik AU - Mahnken, Rolf ID - 44891 IS - 1 JF - PAMM KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics SN - 1617-7061 TI - A thermodynamic framework for the phase‐field approach considering carbide precipitation during phase transformations VL - 22 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 - Kaimann, Daniel AU - Spiess Bru, Clarissa Laura Maria AU - Frick, Bernd ID - 44897 JF - Journal of Wine Economics TI - Ratings Meet Prices: The Dynamic Relationship of Quality Signals ER - TY - CONF AB - In order to follow the 1.5 degree path of the Paris Climate Agreement, drastic greenhouse gas reduction measures are needed in the transport sector. The potential of public transport and new mobility services to reduce transport-related greenhouse gas emissions cannot yet be fully exploited, especially in rural regions. This paper presents the concept of an innovative mobility system, called NeMo.bil, that intends to fill the gap between individual and public transport to create a demand-oriented and sustainable mobility offer. The concept is based on convoy formation of autonomously driving lightweight vehicles serving the first and last mile and a larger towing vehicle carrying enough power and energy to move the convoy over longer distances at higher speeds. This combination of two different vehicles, intelligently controlled by a digital ecosystem, aims to significantly increasing energy, resource and cost efficiency. Based on an analysis of previous approaches for innovative mobility solutions, the concept is derived from a technical and sociological perspective and its potential for reducing energy demand is calculated. AU - Ostermann, Moritz AU - Behm, Jonathan AU - Marten, Thorsten AU - Tröster, Thomas AU - Weyer, Johannes AU - Cepera, Kay AU - Adelt, Fabian ED - Proff, Heike ID - 44502 SN - 9783658394370 T2 - Towards the New Normal in Mobility TI - Individualization of Public Transport – Integration of Technical and Social Dimensions of Sustainable Mobility ER - TY - JOUR AU - Codescu, M.-A. AU - Kunze, T. AU - Weiß, M. AU - Brehm, Martin AU - Kornilov, O. AU - Sebastiani, D. AU - Nibbering, E. T. J. ID - 45013 JF - J. Phys. Chem. Lett. TI - Ultrafast Proton Transfer Pathways Mediated by Amphoteric Imidazole VL - 14 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 -