TY - CHAP A1 - Albrecht, Eike A1 - Schmidt, Michael A1 - Mißler-Behr, Magdalena A1 - Spyra, Simon T1 - Preface T2 - Implementing Adaptation Strategies by Legal, Economic, and Planning Instruments on Climate Change Y1 - 2014 SN - 978-3-540-77613-0 SP - XIII EP - XIV PB - Springer CY - Berlin [u. a.] ER - TY - CHAP A1 - Simon, Sylvio A1 - Wichmann, Steffen A1 - Stein, Erhard A1 - Schmidt, Sindy A1 - Heise, Philipp T1 - Vorbereitung des Werkzeugmaschinenlabor der BTU-CS, Campus SFB für Energieeffizienzmessungen in Maschinenparks und Ermittlung der Energieeffizienz am Beispiel ausgewählter LED Beleuchtung T2 - Proceedings of the International Academic Forum AMO-SPITSE-NESEFF, 21 AMO Conference, Smolensk 2016 N2 - Um den gesamten Energiebedarf für die Herstellung von Produkten zu erfassen, wird exemplarisch das Werkzeugmaschinenlabor der BTU C-S mit aktueller Messtechnik ausgestattet. Diese ermöglicht auch, mögliche Beeinflussungen der Maschinen untereinander sichtbar zu machen. Bei der Ausrüstung von Werkzeugmaschinen mit LED Beleuchtung sind Besonderheiten zu beachten. KW - Energieeffizienz KW - Werkzeugmaschinen KW - Messtechnik KW - LED Beleuchtung Y1 - 2016 SN - 978-5-91412-313-7 SP - S. 127 PB - Izdat. Universum CY - Moscow [u.a.] ER - TY - CHAP A1 - Simon, Sylvio A1 - Wichmann, Steffen A1 - Stein, Erhard A1 - Schmidt, Sindy A1 - Heise, Philipp A1 - Herzog, Marcus T1 - Vorbereitung des Werkzeugmaschinenlabors der BTU CS für Energieeffizienzmessungen in Maschinenparks und Ermittlung der Energieeffizienz am Beispiel ausgewählter LED Beleuchtung T2 - 20 Jahre IURS e.V. - Resümee und ausgewählte Projekte 2012 - 2017 N2 - Die Ausrüstung des Labores mit computergestützter Messdatenerfassung sowie -analyse ermöglicht es, die Energiebedarfe der einzelnen, vor allem energieintensiven Maschinen darzustellen und ihre Auswirkung auf die Energieversorgung des Labors bzw. des örtlichen Netzes sichtbar zu machen. Die im Zuge der Energieeinsparung oft durch LED Leuchtmittel erneuerte Arbeitsplatzbeleuchtung zeigte bei den Energiemessungen eine hohe Blindleistung. Sofern diese Blindleistung z.b. durch Kondensator-Netzteile verursacht wird, kann sie zur Kompensation induktiver Blindleistung aus elektromotorischen Antrieben, wie sie typisch sind für Werkzeugmaschinen, genutzt werden. KW - Energieeffizienz KW - Werkzeugmaschine KW - LED Beleuchtung KW - Energieeffizienzmessung Y1 - 2017 SN - 978-3-00-058468-8 SN - 978-3-00-058469-5 SP - 36 EP - 39 PB - IURS e.V. CY - Senftenberg ET - 1. Auflage ER - TY - CHAP A1 - Medina Méndez, Juan Ali A1 - Glawe, Christoph A1 - Starick, Tommy A1 - Schöps, Mark Simon A1 - Schmidt, Heiko T1 - IMEX-ODTLES: A multi-scale and stochastic approach for highly turbulent flows T2 - 90th Annual Meeting of the International Association of Applied Mathematics and Mechanics February 18-22, 2019 Vienna, Austria, Abstract book Y1 - 2019 UR - https://jahrestagung.gamm-ev.de/images/2019/Photos/GAMM2019_BookofAbstracts.pdf SN - 978-3-903024-84-7 PB - TU-Verlag CY - Wien ER - TY - GEN A1 - Schmidt, Simon A1 - Dornisch, Wolfgang A1 - Müller, Ralf T1 - A phase field model for martensitic transformation coupled with the heat equation T2 - GAMM‐Mitteilungen N2 - In order to consider temperature dependency in a phase field model for martensitic transformations a temperature dependent phase separation potential is introduced. The kinematics and the energetic setup underlying the phase transformation are briefly explained. Parameters are identified using molecular dynamics (MD) simulations. The kinetics of the phase field model are in good agreement with those of the MD simulations. Further, the effect of temperature on the microstructure evolution is studied for varying initial austenite contents. KW - Solidifcation KW - phase-field KW - theory of porous media KW - finite element method KW - multi-scale Y1 - 2017 U6 - https://doi.org/10.1002/gamm.201720005 SN - 1522-2608 VL - 40 IS - 2 SP - 138 EP - 153 ER - TY - GEN A1 - Schmidt, Simon A1 - Dornisch, Wolfgang A1 - Müller, Ralf T1 - Martensitic transformation at a crack under mode I and II loading T2 - Proceedings in Applied Mathematics and Mechanics N2 - Metastable austenitic steels can undergo phase transformation. As an allotrope two crystal configurations are of interest: the softer austenitic parent phase and the martensitic phases. Here, the bain orientation relationship leads to distinct orientations for the martensitic variants with a different transformation strain [7]. A phase field approach is used to model the transformation, where a multi‐valued order parameter urn:x-wiley:16177061:media:PAMM201900465:pamm201900465-math-0001 identifies the austenitic parent phase and the martensitic variants. This allows to define bulk and surface energies as regularized functions in terms of the order parameter and its gradient. The kinetics of the martensitic transformation are temperature dependent. Temperatures below an equilibrium temperature favour the growth of the martensitic phase, whereas temperatures above the equilibrium favour the austenitic phase. Approaching the equilibrium temperature slows down the transformation [5]. In this work we consider a static crack under mode I and mode II loading. Y1 - 2019 U6 - https://doi.org/10.1002/pamm.201900465 SN - 1617-7061 VL - 19 IS - 1 PB - WILEY-VCH Verlag GmbH & Co. KGaA CY - Weinheim ER - TY - GEN A1 - Medina Méndez, Juan Ali A1 - Glawe, Christoph A1 - Starick, Tommy A1 - Schöps, Mark Simon A1 - Schmidt, Heiko T1 - IMEX-ODTLES: A multi-scale and stochastic approach for highly turbulent flows T2 - Proceedings in Applied Mathematics and Mechanics N2 - The stochastic One-Dimensional Turbulence (ODT) model is used in combination with a Large Eddy Simulation (LES) approach in order to illustrate the potential of the fully coupled model (ODTLES) for highly turbulent flows. In this work, we use a new C++ implementation of the ODTLES code in order to analyze the computational performance in a classical incompressible turbulent channel flow problem. The parallelization potential of the model, as well as its physical and numerical consistency are evaluated and compared to Direct Numerical Simulations (DNSs). The numerical results show that the model is capable of reproducing a representative part of the DNS data at a cheaper computational cost. This advantage can be enhanced in the future by the implementation of a straightforward parallelization approach. Y1 - 2019 U6 - https://doi.org/10.1002/pamm.201900433 SN - 1617-7061 VL - 19 IS - 1 ER - TY - GEN A1 - Simon, Sylvio A1 - Wichmann, Steffen A1 - Schmidt, Luise A1 - Luthra, Gaurav ED - Lehmann, Kathrin T1 - Untersuchung der Gratbildung beim Wasserstrahlschneiden T2 - 1. Ingenieurtag 2014 : Veranstaltung der Fakultät Ingenieurwissenschaften und Informatik der Brandenburgischen Technischen Universität Cottbus-Senftenberg auf dem Campus Senftenberg am 19.11.2014 N2 - Wasserstrahlschneiden als modernes Trennverfahren führt bei weicheren Werkstoffen auf Grund der örtlichen Verformungen durch den Schneidmittelstrahl zu einem Fließen der Werkstoffteilchen. Das macht sich als Grat z.B. bei Aluminiumwerkstoffen nachteilig bemerkbar. KW - Wasserstrahlschneiden KW - Gratbildung KW - Abrassivmittel KW - Gratmessung Y1 - 2014 SN - 3-9810211-7-7 SP - 34 EP - 34 PB - Senftenberg CY - Brandenburgische Technische Universität Cottbus-Senftenberg ER - TY - GEN A1 - Krisponeit, Jon-Olaf A1 - Fischer, Simon A1 - Esser, Sven A1 - Moshnyaga, Vasily A1 - Schmidt, Thomas A1 - Piper, Louis F. J. A1 - Flege, Jan Ingo A1 - Falta, Jens T1 - The morphology of VO2/TiO2(001): terraces, facets, and cracks T2 - Scientific Reports N2 - Vanadium dioxide (VO2) features a pronounced, thermally-driven metal-to-insulator transition at 340 K. Employing epitaxial stress on rutile TiO2(001) substrates, the transition can be tuned to occur close to room temperature. Striving for applications in oxide-electronic devices, the lateral homogeneity of such samples must be considered as an important prerequisite for efforts towards miniaturization. Moreover, the preparation of smooth surfaces is crucial for vertically stacked devices and, hence, the design of functional interfaces. Here, the surface morphology of VO2/TiO2(001) films was analyzed by low-energy electron microscopy and diffraction as well as scanning probe microscopy. The formation of large terraces could be achieved under temperature-induced annealing, but also the occurrence of facets was observed and characterized. Further, we report on quasi-periodic arrangements of crack defects which evolve due to thermal stress under cooling. While these might impair some applicational endeavours, they may also present crystallographically well-oriented nano-templates of bulk-like properties for advanced approaches. KW - Vanadium dioxide (VO2) KW - rutile TiO2(001) KW - metal-to-insulator transition KW - morphology KW - crystallography KW - low-energy electron microscopy (LEEM) KW - low-energy electron diffraction (LEED) KW - scanning probe microscopy Y1 - 2020 U6 - https://doi.org/10.1038/s41598-020-78584-9 SN - 2045-2322 VL - 10 ER - TY - GEN A1 - Schmidt, Simon David A1 - Ammar, Kais A1 - Dornisch, Wolfgang A1 - Forest, Samuel A1 - Müller, Ralf T1 - Phase field model for the martensitic transformation: comparison of the Voigt/Taylor and Khachaturyan approach T2 - Continuum Mechanics and Thermodynamics Y1 - 2021 U6 - https://doi.org/10.1007/s00161-021-01007-1 SN - 0935-1175 SN - 1432-0959 VL - 33 IS - 5 SP - 2075 EP - 2094 ER - TY - GEN A1 - Charissé, Daniel A1 - Erus, Guray A1 - Pomponio, Raymond A1 - Gorges, Martin A1 - Schmidt, Nele A1 - Schneider, Christine A1 - Liepelt-Scarfone, Inga A1 - Riedel, Oliver A1 - Reetz, Kathrin A1 - Schulz, Jörg B. A1 - Berg, Daniela A1 - Storch, Alexander A1 - Witt, Karsten A1 - Dodel, Richard A1 - Kalbe, Elke A1 - Kassubek, Jan A1 - Hilker-Roggendorf, Rüdiger A1 - Baudrexel, Simon T1 - Brain age and Alzheimer's-like atrophy are domain-specific predictors of cognitive impairment in Parkinson's disease T2 - Neurobiology of Aging N2 - Recently, it was shown that patients with Parkinson's disease (PD) who exhibit an “Alzheimer's disease (AD)-like” pattern of brain atrophy are at greater risk for future cognitive decline. This study aimed to investigate whether this association is domain-specific and whether atrophy associated with brain aging also relates to cognitive impairment in PD. SPARE-AD, an MRI index capturing AD-like atrophy, and atrophy-based estimates of brain age were computed from longitudinal structural imaging data of 178 PD patients and 84 healthy subjects from the LANDSCAPE cohort. All patients underwent an extensive neuropsychological test battery. Patients diagnosed with mild cognitive impairment or dementia were found to have higher SPARE-AD scores as compared to patients with normal cognition and healthy controls. All patient groups showed increased brain age. SPARE-AD predicted impairment in memory, language and executive functions, whereas advanced brain age was associated with deficits in attention and working memory. Data suggest that SPARE-AD and brain age are differentially related to domain-specific cognitive decline in PD. The underlying pathomechanisms remain to be determined. KW - Alzheimer's disease KW - Brain Age KW - MRI KW - Parkinson's disease KW - Pattern classification Y1 - 2022 UR - https://www.sciencedirect.com/science/article/pii/S0197458021002748?via%3Dihub U6 - https://doi.org/10.1016/j.neurobiolaging.2021.08.020 SN - 0197-4580 VL - 109 SP - 31 EP - 42 ER - TY - GEN A1 - Klein, Marten A1 - Schöps, Mark Simon A1 - Medina Méndez, Juan Alí A1 - Schmidt, Heiko T1 - Numerical simulation and analysis of transient Ekman boundary layers using a stochastic turbulence model T2 - EGU General Assembly 2023 KW - stochastic modeling KW - one-dimensional turbulence KW - turbulent Ekman flow KW - transient boundary layer Y1 - 2023 UR - https://meetingorganizer.copernicus.org/EGU23/EGU23-9116.html U6 - https://doi.org/10.5194/egusphere-egu23-9116 PB - EGU - European Geophysical Union CY - Vienna, Austria ER - TY - GEN A1 - Klein, Marten A1 - Medina Méndez, Juan Alí A1 - Schöps, Mark Simon A1 - Schmidt, Heiko A1 - Glawe, Christoph T1 - Towards physics-based nowcasting of the instantaneous wind velocity profile using a stochastic modeling approach T2 - STAB Jahresbericht 2024 zum 24. DGLR-Fachsymposium der STAB, 13. - 14. November 2024, Regensburg N2 - The primary objective of this contribution is to provide an overview of the regime-spanning forward modeling capabilities offered by the stochastic one-dimensional turbulence model. The focus is on the applicability of the model and its validation for neutral and stable atmospheric boundary layer flows as a prerequisite for future applications to challenging atmospheric conditions. KW - atmospheric boundary layer KW - stochastic modeling KW - one-dimensional turbulence KW - wind energy KW - wind shear and veer Y1 - 2024 UR - https://bfm.rcbe.de/files/2024/11/2024_STAB-Jahresbericht.pdf SP - 162 EP - 163 PB - Deutsche Strömungsmechanische Arbeitsgemeinschaft, STAB CY - Regensburg [et al.] ER - TY - GEN A1 - Medina Méndez, Juan Ali A1 - Klein, Marten A1 - Schöps, Mark Simon A1 - Schmidt, Heiko T1 - Predicting volatile wind energy: Stochastic forward modeling and machine learning T2 - 86. Jahrestagung der DPG (86th Annual Conference of the DPG), DPG-Frühjahrstagung 2023, (DPG Spring Meeting 2023 of the Matter and Cosmos Section (SMuK), 20-24 March 2023, Technische Universität Dresden Y1 - 2023 UR - https://smuk23.dpg-tagungen.de/programm/assets/verhandlungen-smuk23.pdf UR - https://www-docs.b-tu.de/fg-stroemungsmodellierung/public/Klein_poster_dpg23.pdf SN - 2751-0522 SP - S. 343 PB - Deutsche Physikalische Gesellschaft CY - Bad Honnef ER - TY - GEN A1 - Marinković, Pavle A1 - Medina, Juan A. A1 - Schöps, Mark Simon A1 - Klein, Marten A1 - Schmidt, Heiko T1 - Experiences from the bottom‐up development of an object‐oriented CFD solver with prospective hybrid turbulence model applications T2 - Proceedings in Applied Mathematics and Mechanics N2 - In this work, we discuss recent experiences related to the development and enhancement of a hybrid stochastic computational fluid dynamics (CFD) solver, the C++ version of the Implicit/Explicit (IMEX) time‐advancement algorithm used in the one‐dimensional turbulence‐based (ODT) large eddy simulation (LES) model, abbreviated as ODTLES. After being ported from Fortran 90, the current capabilities of the C++ code are restricted to the reproducibility of turbulent channel flow simulations with respect to the former Fortran code version that was able to achieve reasonable agreement with available reference direct numerical simulation (DNS) for low to moderate Reynolds number turbulent channel flows. This is far from satisfactory so that current efforts are centered on improving the solver code structure through comprehensive refactoring, robust unit testing, and strict adherence to code style guides, following the principles of Clean Code. We focus the discussion on a methodology to balance unit, regression, and integration testing, here for the LES component of the code. The objective is to frame a starting point that is relevant also for other CFD codes, irrespective of whether they utilize conventional or novel discretization or flow modeling approaches. KW - Computational fluid dynamics (CFD) KW - Solver development KW - Software maintainabilit KW - Software dependability KW - Large-eddy simulation (LES) KW - Stochastic subgrid scale modeling Y1 - 2025 U6 - https://doi.org/10.1002/pamm.202400190 SN - 1617-7061 VL - 25 IS - 1 PB - Wiley ER - TY - CHAP A1 - Klein, Marten A1 - Glawe, Christoph A1 - Ehlert, Mark Simon A1 - Medina Méndez, Juan Alí A1 - Schmidt, Heiko ED - Dillmann, Andreas ED - Heller, Gerd ED - Krämer, Ewald ED - Breitsamer, Christian ED - Wagner, Claus ED - Krenkel, Lars T1 - Stochastic modeling of intermittent inflow turbulence in the atmospheric boundary layer T2 - New Results in Numerical and Experimental Fluid Mechanics XV : contributions to the 24th STAB/DGLR Symposium, Regensburg, Germany, 2024 N2 - Wind turbine predesign is challenged by the representation of site-specific wind conditions. A good deal of that challenge lies in the modeling of the inflow turbulence in the atmospheric boundary layer (ABL). A stochastic one-dimensional turbulence (ODT) model is applied to an idealized neutrally stratified ABL and evolves the instantaneous velocity profile with full-scale resolution. The model is able to reproduce the law of the wall consistently after an initial calibration with the surface drag law. Investigating turbulent time series of the horizontal velocity components it is demonstrated that the model generates physically justified intermittency features with increasing turbulence intensity. KW - Atmospheric boundary layer KW - Intermittency KW - Stochastic modeling KW - Turbulent inflow Y1 - 2026 SN - 978-3-032-11115-9 U6 - https://doi.org/10.1007/978-3-032-11115-9_63 SN - 1612-2909 SP - 684 EP - 693 PB - Springer Nature Switzerland CY - Cham ER - TY - GEN A1 - Margolis, Anna A1 - Schmidt, Simon L. A1 - Böckel, Alexa A1 - Blomsma, Fenna T1 - Applying design science in creativity and innovation management research : a decision guide for deepening research practice T2 - Creativity and innovation management N2 - Creativity and innovation management research (CIMR) seeks to understand how creative and innovative solutions emerge. Recently, greater practitioner engagement, interdisciplinary integration, process orientation and context-sensitive impact measurement have been proposed as realms of further development. To address these opportunities, we introduce Design Science Research (DSR) as a complementary methodology for CIMR. DSR connects theory and practice through the iterative development of practice-oriented artifacts that are grounded in theory, thus enabling scholars to co-create actionable tools jointly with practitioners. We have adapted DSR to the unique characteristics of CIMR—such as interdisciplinarity, process orientation and pluralist ontological and epistemological positions—by developing the DeepDSR Guide. The DeepDSR Guide supports CIMR scholars in making consistent and reflexive methodological choices throughout DSR projects. We have iteratively developed and validated the DeepDSR Guide with feedback from 21 scholars following a DSR approach. Our study contributes methodologically by adapting DSR to fit the pluralist, creative nature of CIMR and expands the application of DSR in management research. Y1 - 2026 U6 - https://doi.org/10.1111/caim.70049 SN - 1467-8691 SN - 0963-1690 SP - 1 EP - 38 PB - John Wiley & Sons Ltd. CY - Hoboken, NJ ER -