نتایج جستجو برای: surface impedance model

تعداد نتایج: 2657661  

Journal: :The Quarterly Journal of Mechanics and Applied Mathematics 1996

2013
Edith Schäfer Marco Tarantola Elena Polo Christian Westendorf Noriko Oikawa Eberhard Bodenschatz Burkhard Geil Andreas Janshoff

Chemotactic responses of Dictyostelium discoideum cells to periodic self-generated signals of extracellular cAMP comprise a large number of intricate morphological changes on different length scales. Here, we scrutinized chemotaxis of single Dictyostelium discoideum cells under conditions of starvation using a variety of optical, electrical and acoustic methods. Amebas were seeded on gold elect...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2001
A M Al-Khateeb O Boine-Frankenheim I Hofmann G Rumolo

The longitudinal space charge and resistive wall impedances have been investigated in a smooth cylindrical beam pipe. At any point from the beam axis, we obtained an expression for the total impedance, which at the beam surface r=a for infinite pipe wall conductivity gives the expression for the total impedance that was derived by Zotter and Kheifets in studying the impedance of uniform beams i...

Journal: :The Japanese journal of ergonomics 1971

Journal: :Journal of the Physical Society of Japan 2011

Journal: :Journal of the Japan Institute of Metals and Materials 2014

Electrochemical impedance spectroscopy and gravimetric methods were carried out to analyze water uptake of thin polyurethane films separately filled with either hydrophobic or hydrophilic nano-silica. Correspondingly the impedance spectra and gravimetric data were interpreted in terms of movement of water within the coating and/or to the coating/metal interface. Although the obtained results fr...

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