Results 271 to 280 of about 8,444,233 (303)
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Electrical charging of water drops in polarizing electric fields
Journal of Electrostatics, 1975Abstract Measurements were made of the electric charge acquired by drops of mean radius of about 750 μm as they fell through a cloud of water droplets of mean radius 16 μm, in the presence of a vertical electric field E , the value of which could be varied from 4.5 to 27 kV m −1 .
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Polarization and interactions of colloidal particles in ac electric fields
The Journal of Chemical Physics, 2008Micrometer-sized polystyrene particles form two-dimensional crystals in alternating current (ac) electric fields. The induced dipole-dipole interaction is the dominant force that drives this assembly. We report measurements of forces between colloidal particles in ac electric fields using optical tweezers and find good agreement with the point dipole ...
Manish, Mittal +3 more
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Electric polarization and conductivity of polystyrene in unidirectional electric field
Kolloid-Zeitschrift & Zeitschrift für Polymere, 1970The present work interprets the anomalous conductivity and the discharge and recovery voltage in polystyrene as a result of the dielectric relaxation processes—the dipole-orientation polarizations. This view is based on a number of author's measurements and on some literature data. Approximate relations were derived for the time dependence of discharge
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Field-aligned currents and polar cap electric fields
Journal of Geophysical Research, 1976An equation is derived which describes the relation between the field-aligned current, the electric field, and the density inhomogeneity in the polar cap region. Self-consistent electric field patterns are obtained for the case when a pair of field-aligned currents (downward on the dawn side and upward on the dusk side) and an enhancement of the ...
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Polarization of a Spherical Cell in a Nonuniform Extracellular Electric Field
Annals of Biomedical Engineering, 2005Polarization of cells by extracellular fields is relevant to neural stimulation, cardiac pacing, cardiac defibrillation, and electroporation. The electric field generated by an extracellular electrode may be nonuniform, and highly nonuniform fields are produced by microelectrodes and near the edges of larger electrodes.
Dongchul C, Lee, Warren M, Grill
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Automated system for electrical field-polarization studies in ferroelectrics
Review of Scientific Instruments, 1979An automated system for measuring dielectric polarization as a function of applied electric field and time has been developed. This system, which is based on the Sawyer–Tower technique for obtaining ferroelectric hysteresis loops, is built around a programmable high-voltage power supply and an automatic data acquisition system, both commercially ...
V R, Yarberry, I J, Fritz
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Transformation of polar nematic phases in the presence of an electric field
Physical Review EOnly a few years have passed since the discovery of polar nematics, and now they are becoming the most actively studied liquid-crystal materials. Despite numerous breakthrough findings made recently, a theoretical systematization is still lacking. In the present paper, we take a step toward systematization.
A. V. Emelyanenko +5 more
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Polarization of the Nucleus by Electric Fields
Physical Review, 1951Gunther-Mohr, G. R. +2 more
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Polarized Electric Field-Induced Drift of Spiral Waves in Discontinuous Cardiac Media
Chaos, Solitons and Fractals, 2023Ya Jia, Yipeng Hu
exaly