Global ETD Search

1	Grundlegende Aspekte der Reibechtheit von reaktivgefärbten Cellulosematerialien Strauß, Frank. January 2000 (has links) Stuttgart, Univ., Diss., 2000. Reaktivfarbstoff. Reibungskraft.
2	Reduzierung der Reibkraft durch Ultraschallwellen / Liu, Yi. January 1993 (has links) Zugl.: Paderborn, Universiẗat, Diss., 1992. Reibungskraft Haftreibung
3	Messung der Ionenreibungskraft an frei fallenden Partikeln in einem Plasma Hirt, Markus. Unknown Date (has links) (PDF) Universiẗat, Diss., 2003--Kiel.
4	Dynamical measurements with quartz resonators Laschitsch, Alexander Thomas. Unknown Date (has links) (PDF) University, Diss., 2000--Mainz. / Auch als gedr. Diss.
5	Verfahren zur Minimierung des Einflusses von Störkräften in lagegeregelten Vorschubantrieben Doenitz, Steffen. Unknown Date (has links) Techn. Universiẗat, Diss., 2003--Darmstadt.
6	Friction and adhesion mediated by supramolecular host–guest complexes Guerra, Roberto, Benassi, Andrea, Vanossi, Andrea, Ma, Ming, Urbakh, Michael 13 January 2020 (has links) The adhesive and frictional response of an AFM tip connected to a substrate through supramolecular host–guest complexes is investigated by dynamic Monte Carlo simulations. Here, the variation of the pull-off force with the unloading rate recently observed in experiments is unraveled by evidencing simultaneous (progressive) breaking of the bonds at fast (slow) rates. The model reveals the origin of the observed plateaus in the retraction force as a function of the tip-surface distance, showing that they result from the tip geometrical features. In lateral sliding, the model exhibits a wide range of dynamic behaviors ranging from smooth sliding to stick-slip at different velocities, with the average friction force determined by the characteristic formation/rupture rates of the complexes. In particular, it is shown that for some molecular complexes friction can become almost constant over a wide range of velocities. Also, we show the possibility of exploiting the ageing effect through slide-hold-slide experiments, in order to infer the characteristic formation rate. Finally, our model predicts a novel ‘‘antiageing’’ effect which is characterized by a decrease of the static friction force with the hold time. Such an effect is explained in terms of enhancement of adhesion during sliding, especially observed at high driving velocities. info:eu-repo/classification/ddc/540 ddc:540
7	Partikelmodellierung der Strukturbildung akustischer Kavitationsblasen in Wechselwirkung mit dem Schalldruckfeld / Particle modeling of acoustic cavitation bubble structure formation and interaction with the acoustic pressure field Koch, Philipp 29 August 2006 (has links) No description available. 530 Physik Mathematics and Computer Science akustische Kavitation Strukturbildung akustische Lichtenbergfigur nichtlineare radiale Blasendynamik Keller-Miksis-Modell Oberflächenstabilität Gasdiffusion Partikelmodellierung primäre und sekundäre Bjerkneskraft Reibungskraft virtuelle Masse Ultraschallfeld Helmholtz-Gleichung stehende Schallfeldmode Resonanzverschiebung Blasen-Flüssigkeits-Gemisch van Wijngaarden-Wellengleichung Einzelblase Vielblasensysteme Hochgeschwindigkeitsaufnahme acoustic cavitation structure formation acoustic Lichtenberg figur nonlinear radial bubble oscillation Keller-Miksis model surface stability gas diffusion particel modeling primary and sekundary Bjerknes force drag force added mass ultrasonic field Helmholtz equation standing wave field resonance shift bubble liquid mixture van Wijngaarden wave equation single bubble multi bubble systems high-speed video observations 33.12 30.20 RHK 000: Ultraschall {Physik: Akustik} RHH 150: Schallausbreitung -reflexion in Flüssigkeiten {Physik: Akustik}

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