TY - JOUR A1 - Reisgen, Uwe A1 - Schleser, Markus A1 - Schiebahn, Alexander T1 - Untersuchung zum Einfluss von Maschineneigenschaften von Schweißzangen zum Widerstandspunktschweißen auf das Schweißergebnis JF - Schweissen und Schneiden : Fachzeitschrift für Schweißen und verwandte Verfahren Y1 - 2013 SN - 0036-7184 VL - Bd. 65 IS - H. 6 SP - 309 EP - 313 PB - DVS Verl. CY - Düsseldorf ER - TY - JOUR A1 - Müller-Veggian, Mattea A1 - Dehnhardt, W. A1 - Mills, J. S. T1 - Untersuchung von Yrast-Kaskaden in geraden Ce-Isotopen JF - Jahresbericht / Max-Planck-Institut für Kernphysik Y1 - 1973 SP - 83 PB - MPI CY - Heidelberg ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Rinkleff, T T1 - Untersuchung eines hybriden EMV-Simulationsverfahrens anhand eines virtuellen Komponententests JF - Technisches Messen. 70 (2003), H. 3 Y1 - 2003 SN - 0340-837X N1 - 2. ISSN: 0178-2312; 3. ISSN: 0171-8096 SP - 133 EP - 140 ER - TY - JOUR A1 - Lassonczyk, Beate T1 - Untersuchung einer Chronosequenz in Nord-Somalia zur Kennzeichnung der Landschaftsgeschichte JF - 14th International Congress of Soil Science : transactions. vol. 5. Kyoto, Japan, August 12 - 18, 1990 = 14ème Congrès International de la Science du Sol = 14. Internationaler Bodenkundlicher Kongreß / International Society of Soil Science Y1 - 1990 N1 - International Congress of Soil Science ; <14 : ; 1990.08.12-18 : ; Kyoto> SP - 370 EP - 371 ER - TY - JOUR A1 - Kotter, Michael A1 - Lintz, Hans-Günther A1 - Wittstock, Klaus T1 - Untersuchung der Zwischenproduktbildung bei der katalytischen Nachverbrennung Iösemittelbeladener Abluft an Nichtedelmetall-Katalysatoren JF - Chemie - Ingenieur - Technik. 66 (1994), H. 10 Y1 - 1994 SN - 0009-286X N1 - ISSN der E-Ausg.: 1522-2640 SP - 1369 EP - 1372 ER - TY - JOUR A1 - Keutmann, Sabine A1 - Staat, Manfred A1 - Laack, Walter van T1 - Untersuchung der thermischen Auswirkung von therapeutischem Ultraschall N2 - Zusammenfassung: In der Orthopädie zählt der therapeutische Ultraschall als Mittel zur Prävention und Therapiebegleitung. Er hat mechanische, thermische und physiko-chemische Auswirkungen auf den menschlichen Körper. Um mehr Erkenntnisse über die thermischen Auswirkungen zu erlangen, wurden Versuche an einem Hydrogel-Phantom und an Probanden durchgeführt. Dabei entstand eine signifikante Erwärmung des Gewebes, welche beim Probandenversuch an der Oberfläche und beim Hydrogelversuch in der Tiefe gemessen wurde. Summary: In orthopaedics, therapeutic ultrasound is a tool of prevention and therapy support. It has mechanical, thermal and physico-chemical effects on the human body. Tests with a hydrogel phantom and with human probands have been performed in order to obtain more knowledge about their thermal effects. Both tests measured temperature increases in cell tissue, on the surface with the human proband test and in depth with the hydrogel phantom test. T2 - Research about the thermal effects of therapeutic ultrasound Y1 - 2018 SN - 2193-5793 SN - 2193-5785 (Druckausgabe) VL - 7 IS - 10 SP - 518 EP - 522 PB - Deutscher Ärzte-Verl. CY - Köln ER - TY - JOUR A1 - Müller-Veggian, Mattea A1 - Jannsens, R. A1 - Masri, Y. El. A1 - Michel, C. T1 - Untersuchung der Hochspinzustände in ¹⁷⁸,¹⁸⁰ Os JF - Frühjahrstagung ... des Fachausschusses Kernphysik und Hochenergiephysik der DPG (Sektion A: Kernphysik) / Deutsche Physikalische Gesellschaft. 11 (1976) Y1 - 1976 N1 - Verhandlungen der Deutschen Physikalischen Gesellschaft ; 1976=6.R.11,8 SP - 950 ER - TY - JOUR A1 - Krause, Gregor A1 - Kehle, Uwe T1 - Unterstützung des Motorhochlaufs eines Pumpspeicherkraftwerks durch Mittel der Blindleistungskompensation / Uwe Kehle, Gregor Krause JF - Ertüchtigung von Kraftwerken und Netzen, insbesondere in den neuen Bundesländern. Energietechnische Gesellschaft am 20. und 21. Oktober 1993 in Mannheim Y1 - 1993 SN - 3-8007-1967-3 N1 - ETG-Fachbericht ; 47 SP - 287 EP - 296 PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Siedenbiedel, Georg T1 - Unternehmenspräsenz am Auslandsmarkt JF - Business-to-Business-Marketing : Handbuch für Vertrieb, Technik, Service / Werner Pepels (Hrsg.) Y1 - 1999 SP - 630 EP - 646 PB - Luchterhand CY - Neuwied [u.a.] ER - TY - JOUR A1 - Weßling, Matthias T1 - Unternehmenskultur JF - Ergebnisse empirischer betriebswirtschaftlicher Forschung : zu einer Realtheorie der Unternehmung ; Festschrift für Eberhard Witte / Jürgen Hauschildt ... (Hrsg.) Y1 - 1993 SN - 3-7910-0678-9 SP - 115 EP - 134 PB - Schäffer-Poeschel CY - Stuttgart ER - TY - JOUR A1 - Valero, Daniel A1 - Bung, Daniel Bernhard A1 - Erpicum, Sebastien A1 - Peltier, Yann A1 - Dewals, Benjamin T1 - Unsteady shallow meandering flows in rectangular reservoirs: a modal analysis of URANS modelling JF - Journal of Hydro-environment Research N2 - Shallow flows are common in natural and human-made environments. Even for simple rectangular shallow reservoirs, recent laboratory experiments show that the developing flow fields are particularly complex, involving large-scale turbulent structures. For specific combinations of reservoir size and hydraulic conditions, a meandering jet can be observed. While some aspects of this pseudo-2D flow pattern can be reproduced using a 2D numerical model, new 3D simulations, based on the unsteady Reynolds-Averaged Navier-Stokes equations, show consistent advantages as presented herein. A Proper Orthogonal Decomposition was used to characterize the four most energetic modes of the meandering jet at the free surface level, allowing comparison against experimental data and 2D (depth-averaged) numerical results. Three different isotropic eddy viscosity models (RNG k-ε, k-ε, k-ω) were tested. The 3D models accurately predicted the frequency of the modes, whereas the amplitudes of the modes and associated energy were damped for the friction-dominant cases and augmented for non-frictional ones. The performance of the three turbulence models remained essentially similar, with slightly better predictions by RNG k-ε model in the case with the highest Reynolds number. Finally, the Q-criterion was used to identify vortices and study their dynamics, assisting on the identification of the differences between: i) the three-dimensional phenomenon (here reproduced), ii) its two-dimensional footprint in the free surface (experimental observations) and iii) the depth-averaged case (represented by 2D models). KW - coherent structures KW - hydraulic modelling KW - model performance KW - Proper Orthogonal Decomposition KW - Q-criterion Y1 - 2022 U6 - https://doi.org/10.1016/j.jher.2022.03.002 SN - 1570-6443 IS - In Press PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Ferrein, Alexander A1 - Jacobs, Stefan A1 - Lakemeyer, Gerhard T1 - Unreal Golog Bots / Jacobs, Stefan ; Ferrein, Alexander ; Lakemeyer, Gerhard JF - IJCAI-05 Workshop on Reasoning, Representation, and Learning in Computer Games Y1 - 2005 SP - 31 EP - 36 ER - TY - JOUR A1 - Bialonski, Stephan A1 - Wendler, Martin A1 - Lehnertz, Klaus T1 - Unraveling spurious properties of interaction networks with tailored random networks JF - Plos one N2 - We investigate interaction networks that we derive from multivariate time series with methods frequently employed in diverse scientific fields such as biology, quantitative finance, physics, earth and climate sciences, and the neurosciences. Mimicking experimental situations, we generate time series with finite length and varying frequency content but from independent stochastic processes. Using the correlation coefficient and the maximum cross-correlation, we estimate interdependencies between these time series. With clustering coefficient and average shortest path length, we observe unweighted interaction networks, derived via thresholding the values of interdependence, to possess non-trivial topologies as compared to Erdös-Rényi networks, which would indicate small-world characteristics. These topologies reflect the mostly unavoidable finiteness of the data, which limits the reliability of typically used estimators of signal interdependence. We propose random networks that are tailored to the way interaction networks are derived from empirical data. Through an exemplary investigation of multichannel electroencephalographic recordings of epileptic seizures – known for their complex spatial and temporal dynamics – we show that such random networks help to distinguish network properties of interdependence structures related to seizure dynamics from those spuriously induced by the applied methods of analysis. Y1 - 2011 U6 - https://doi.org/10.1371/journal.pone.0022826 VL - 6 IS - 8 PB - Plos CY - San Francisco ER - TY - JOUR A1 - Meliß, Michael A1 - Bünde, R. T1 - Unkonventionelle Energiequellen - Entwicklungsstudien (4) JF - Brennstoff, Wärme, Kraft : BWK Y1 - 1978 SN - 0006-9612 (Print) ; 1436-4883 (E-Journal) VL - 30 IS - 3 SP - 120 EP - 126 PB - Springer-VDI-Verlag CY - Düsseldorf ER - TY - JOUR A1 - Starke, Günther A1 - Drews, P. T1 - Universelles Roboterprogrammiersystem zur Fertigung von Großfahrzeugen JF - Schweißen und Schneiden. 47 (1995), H. 9 Y1 - 1995 SN - 0036-7184 SP - 707 EP - 713 ER - TY - JOUR A1 - Engels, Elmar A1 - Wiendahl, H.-P. A1 - Doege, E. T1 - Universelle hydraulische Try-Out Presse / Teilprojekt A6 / Wiendahl, H.-P. ; Doege, E. ; Engels, E. JF - Tagungsband : 12. Oktober 1999, Leibnizhaus Hannover / Sonderforschungsbereich 384 Verfügbarkeitssicherung Reaktionsschneller Produktionssysteme, Universität Hannover. Hrsg.: H.-P. Wiendahl ; M. Röhrig Y1 - 1999 SN - 3-00-005495-2 N1 - Industriekolloquium Verfügbarkeit <1999, Hannover> ; Sonderforschungsbereich Verfügbarkeitssicherung Reaktionsschneller Produktionssysteme CY - Hannover ER - TY - JOUR A1 - Stulpe, Werner T1 - Unitary Operator JF - Compendium of Quantum Physics : concepts, experiments, history and philosophy / Daniel Greenberger ... ed. Y1 - 2009 SN - 978-3-540-70622-9 SP - 807 EP - 809 PB - Springer CY - Berlin ER - TY - JOUR A1 - Reißel, Martin A1 - Lustfeld, H. A1 - Hirschfeld, J. A1 - Steffen, B. T1 - Uniqueness of magnetotomography for fuel cells and fuel cell stacks / Lustfeld, H. ; Hirschfeld, J. ; Reißel, M ; Steffen, B. JF - Journal of Physics A: Mathematical and Theoretical. 42 (2009), H. 495205 Y1 - 2009 SN - 0022-3689 SP - 9 S. ER - TY - JOUR A1 - Schäfer, Horst A1 - Worschech, L. A1 - Ossau, W. A1 - Landwehr, G. T1 - Uniaxiale und planare Verspannung von Störstellenkomplexen in ZnSe/GaAs Schichten Y1 - 1997 N1 - Als Poster vorgelegt auf der Frühjahrstagung der DPG in Münster, 17.-21. März 1997, Verhandl. DPG (VI) 32, HL 11.51 / Physikalisches Institut der Universität Würzburg. ER - TY - JOUR A1 - Reisgen, Uwe A1 - Schleser, Markus A1 - Mokrov, Oleg A1 - Ahmed, Essam T1 - Uni- and bi-axial deformation behavior of laser welded advanced high strength steel sheets JF - Journal of materials processing technology N2 - Bead-on-plate butt joints of 2.5 mm hot rolled DP600/DP600 and 1.2 mm cold rolled TRIP700/TRIP700 steel sheets were performed using 6 kW CO2 laser beam welding. The welding speed ranged from 1.5 to 3.0 and from 2.1 to 3.9 m/min in DP/DP and TRIP/TRIP steel weldments respectively. A top surface helium gas was used as a shielding gas at a flow rate of 20 l/min. Metallographic examinations and transverse tensile testing (DIN EN 895: 1995) were carried out to characterize the weldments. The formability of base metals and weldments were investigated by standard Erichsen test (DIN EN ISO 20482). It was found that the uniaxial plastic behavior of both DP600 and TRIP700 base metals was in agreement with Swift and modified Mecking–Kocks models respectively. In a perpendicular tensile test to the weld line, all specimens were fractured at the base metal however the strengths were somewhat higher than those of base metal. There was a significant reduction in formability caused by welding of both DP/DP and TRIP/TRIP steel weldments and the formability has been improved with the increase of the welding speed. Y1 - 2010 U6 - https://doi.org/http10.1016/j.jmatprotec.2010.08.003 SN - 0924-0136 VL - 210 IS - 15 SP - 2188 EP - 2196 PB - Elsevier CY - Amsterdam ER -