@article{43034, abstract = {{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.}}, author = {{Josch, Sebastian and Jesinghausen, Steffen and Schmid, Hans-Joachim}}, issn = {{1617-8106}}, journal = {{Applied Rheology}}, keywords = {{Condensed Matter Physics, General Materials Science}}, number = {{1}}, publisher = {{Walter de Gruyter GmbH}}, title = {{{Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete}}}, doi = {{10.1515/arh-2022-0140}}, volume = {{33}}, year = {{2023}}, } @inbook{44249, abstract = {{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.}}, author = {{Schönhärl, Korinna and Düll, Nasrin and Ramírez Lugo , Nadya Melina}}, booktitle = {{Tax Evasion and Tax Havens since the Nineteenth Century }}, editor = {{Sébastien, Guex and Hadrien, Buclin}}, pages = {{355--376}}, publisher = {{Springer}}, title = {{{Tax Education After WWII: How Spain, the USA, and West Germany Tried to Make Their Citizens Pay Honestly}}}, year = {{2023}}, } @article{44321, author = {{Neumann, Phillip}}, issn = {{0513-9066}}, journal = {{Zeitschrift für Heilpädagogik}}, keywords = {{Inklusion, Sonderpädagogik, Bildung, Bildungsstudien, Integration}}, number = {{5}}, pages = {{230--232}}, title = {{{Studien zu Schulleistungen und ihre Aufbereitung}}}, volume = {{74}}, year = {{2023}}, } @inproceedings{20841, author = {{Gharibian, Sevag and Watson, James and Bausch, Johannes}}, booktitle = {{Proceedings of the 40th International Symposium on Theoretical Aspects of Computer Science (STACS)}}, pages = {{54:1--54:21}}, title = {{{The Complexity of Translationally Invariant Problems beyond Ground State Energies}}}, doi = {{https://doi.org/10.4230/LIPIcs.STACS.2023.54}}, volume = {{254}}, year = {{2023}}, } @unpublished{44512, abstract = {{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.}}, author = {{Uhlemeyer, Svenja and Lienen, Julian and Hüllermeier, Eyke and Gottschalk, Hanno}}, booktitle = {{arXiv:2305.00983}}, title = {{{Detecting Novelties with Empty Classes}}}, year = {{2023}}, } @article{44672, abstract = {{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.}}, author = {{Bender, Amelie}}, issn = {{0924-4247}}, journal = {{Sensors and Actuators A: Physical}}, keywords = {{Condition Monitoring, Model-based approach Diagnostics, Varying conditions, Explainability, Piezoelectric bending actuators}}, publisher = {{Elsevier BV}}, title = {{{Model-based condition monitoring of piezoelectric bending actuators}}}, doi = {{10.1016/j.sna.2023.114399}}, volume = {{357}}, year = {{2023}}, } @inproceedings{44194, author = {{Ahmed, Qazi Arbab and Awais, Muhammad and Platzner, Marco}}, booktitle = {{The 24th International Symposium on Quality Electronic Design (ISQED'23), San Francisco, Califorina USA}}, location = {{San Fransico CA 94023-0607, USA}}, title = {{{MAAS: Hiding Trojans in Approximate Circuits}}}, year = {{2023}}, } @article{44044, abstract = {{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.}}, author = {{Geromel, René and Georgi, Philip and Protte, Maximilian and Lei, Shiwei and Bartley, Tim and Huang, Lingling and Zentgraf, Thomas}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, keywords = {{Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering}}, number = {{8}}, pages = {{3196 -- 3201}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Compact Metasurface-Based Optical Pulse-Shaping Device}}}, doi = {{10.1021/acs.nanolett.2c04980}}, volume = {{23}}, year = {{2023}}, } @article{44837, abstract = {{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.}}, author = {{Wortmann, Martin and Keil, Waldemar and Diestelhorst, Elise and Westphal, Michael and Haverkamp, René and Brockhagen, Bennet and Biedinger, Jan and Bondzio, Laila and Weinberger, Christian and Baier, Dominik and Tiemann, Michael and Hütten, Andreas and Hellweg, Thomas and Reiss, Günter and Schmidt, Claudia and Sattler, Klaus and Frese, Natalie}}, issn = {{2046-2069}}, journal = {{RSC Advances}}, keywords = {{General Chemical Engineering, General Chemistry}}, number = {{21}}, pages = {{14181--14189}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Hard carbon microspheres with bimodal size distribution and hierarchical porosity via hydrothermal carbonization of trehalose}}}, doi = {{10.1039/d3ra01301d}}, volume = {{13}}, year = {{2023}}, } @inproceedings{45205, author = {{Dreiling, Dmitrij and Itner, Dominik and Hetkämper, Tim and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}}, booktitle = {{SMSI 2023 Conference}}, isbn = {{978-3-9819376-8-8}}, location = {{Nürnberg}}, pages = {{394 -- 395}}, publisher = {{AMA Association For Sensors And Measurement}}, title = {{{Improved determination of viscoelastic material parameters using a pulse-echo measurement setup}}}, doi = {{10.5162/SMSI2023/P59}}, year = {{2023}}, } @misc{43375, author = {{Koch, Angelina}}, title = {{{Privacy-Preserving Collection and Evaluation of Log Files}}}, year = {{2023}}, } @article{44361, author = {{Schryen, Guido and Sperling, Martina}}, journal = {{Computers & Operations Research}}, number = {{September}}, title = {{{Literature Reviews in Operations Research: A New Taxonomy and a Meta Review}}}, volume = {{157}}, year = {{2023}}, } @article{45596, abstract = {{Dielectric metasurfaces provide a unique platform for efficient harmonic generation and optical wavefront manipulation at the nanoscale. Tailoring phase and amplitude of a nonlinearly generated wave with a high emission efficiency using resonance-based metasurfaces is a challenging task that often requires state-of-the-art numerical methods. Here, we propose a simple yet effective approach combining a sampling method with a Monte Carlo approach to design the third-harmonic wavefront generated by all-dielectric metasurfaces composed of elliptical silicon nanodisks. Using this approach, we theoretically demonstrate the full nonlinear 2π phase control with a uniform and highest possible amplitude in the considered parameter space, allowing us to design metasurfaces operating as third harmonic beam deflectors capable of steering light into a desired direction with high emission efficiency. The TH beam deflection with a record calculated average conversion efficiency of 1.2 × 10–1 W–2 is achieved. We anticipate that the proposed approach will be widely applied as alternative to commonly used optimization algorithms with higher complexity and implementation effort for the design of metasurfaces with other holographic functionalities.}}, author = {{Hähnel, David and Förstner, Jens and Myroshnychenko, Viktor}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{tet_topic_meta}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Efficient Modeling and Tailoring of Nonlinear Wavefronts in Dielectric Metasurfaces}}}, doi = {{10.1021/acsphotonics.2c01967}}, year = {{2023}}, } @inbook{45606, author = {{Freymuth, Nina}}, booktitle = {{Diskriminierungsprozesse und Teilhabeperspektiven - Herausforderungen für die Praxis der Inklusion. Ausgewählte Master-Thesen 2018-2022 des Masterstudiengangs "Soziale Inklusion: Gesundheit und Bildung" der Evangelischen Hochschule Rheinland-Westfalen-Lippe}}, editor = {{Balz, HHans-Jürgen and Huneke, Annika and Kuhlmann, Carola and Römisch, Kathrin}}, pages = {{22--33}}, title = {{{Alternative für alle? Inklusionsspezifische Analyse der AfD und ihrer Wähler*innen}}}, year = {{2023}}, } @article{44383, author = {{Dieter, Peter and Caron, Matthew and Schryen, Guido}}, journal = {{European Journal of Operational Research (EJOR)}}, number = {{1}}, pages = {{283--300}}, title = {{{Integrating driver behavior into last-mile delivery routing: Combining machine learning and optimization in a hybrid decision support framework}}}, doi = {{https://doi.org/10.1016/j.ejor.2023.04.043}}, volume = {{311}}, year = {{2023}}, } @inproceedings{45695, author = {{Hotegni, Sedjro Salomon and Mahabadi, Sepideh and Vakilian, Ali}}, booktitle = {{Proceedings of the 40th International Conference on Machine Learning, Honolulu, Hawaii, USA. PMLR 202, 2023.}}, keywords = {{Fair range clustering}}, location = {{Honolulu, Hawaii, USA}}, title = {{{Approximation Algorithms for Fair Range Clustering}}}, year = {{2023}}, } @inproceedings{43060, author = {{Hebrok, Sven Niclas and Nachtigall, Simon and Maehren, Marcel and Erinola, Nurullah and Merget, Robert and Somorovsky, Juraj and Schwenk, Jörg}}, booktitle = {{32nd USENIX Security Symposium}}, title = {{{We Really Need to Talk About Session Tickets: A Large-Scale Analysis of Cryptographic Dangers with TLS Session Tickets}}}, year = {{2023}}, } @article{44116, abstract = {{Faradaic reactions including charge transfer are often accompanied with diffusion limitation inside the bulk. Conductive two-dimensional frameworks (2D MOFs) with a fast ion transport can combine both - charge transfer and fast diffusion inside their porous structure. To study remaining diffusion limitations caused by particle morphology, different synthesis routes of Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3(HHTP)2), a copper-based 2D MOF, are used to obtain flake- and rod-like MOF particles. Both morphologies are systematically characterized and evaluated for redox-active Li+ ion storage. The redox mechanism is investigated by means of X-ray absorption spectroscopy, FTIR spectroscopy and in situ XRD. Both types are compared regarding kinetic properties for Li+ ion storage via cyclic voltammetry and impedance spectroscopy. A significant influence of particle morphology for 2D MOFs on kinetic aspects of electrochemical Li+ ion storage can be observed. This study opens the path for optimization of redox active porous structures to overcome diffusion limitations of Faradaic processes.}}, author = {{Wrogemann, Jens Matthies and Lüther, Marco Joes and Bärmann, Peer and Lounasvuori, Mailis and Javed, Ali and Tiemann, Michael and Golnak, Ronny and Xiao, Jie and Petit, Tristan and Placke, Tobias and Winter, Martin}}, issn = {{1433-7851}}, journal = {{Angewandte Chemie International Edition}}, keywords = {{General Chemistry, Catalysis}}, number = {{26}}, pages = {{e202303111}}, publisher = {{Wiley}}, title = {{{Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage}}}, doi = {{10.1002/anie.202303111}}, volume = {{62}}, year = {{2023}}, } @misc{36842, booktitle = {{Navigationen - Zeitschrift für Medien- und Kulturwissenschaften}}, editor = {{Eckel, Julia and Ernst, Christoph and Schröter, Jens}}, issn = {{1619-1641}}, keywords = {{tech demo, technology demonstration, demo or die}}, number = {{1}}, title = {{{Navigationen: Tech | Demo}}}, volume = {{23}}, year = {{2023}}, } @inproceedings{45759, author = {{Abbas, Nilab and Bauer, Anna Brigitte and Reinhold, Peter}}, booktitle = {{Lernen, Lehren und Forschen in einer digital geprägten Welt}}, editor = {{van Vorst, Helena}}, location = {{Aachen 2023}}, title = {{{PSΦ: Entwicklung von Unterstützungsmaßnahmen für Theoretische Physik}}}, year = {{2023}}, }