Results 211 to 220 of about 632,035 (264)

Current Management of Transient Ischemic Attack

American Journal of Cardiovascular Drugs, 2007
Transient ischemic attack (TIA) is a precursor to ischemic stroke. At least half of patients with TIA have a new, small ischemic lesion demonstrable on magnetic resonance imaging using a diffusion weighted sequence. The risk of subsequent major stroke is 10-20% in the next 3 months with much of that risk front-loaded in the first week.
Padmavathy N, Sylaja, Michael D, Hill
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Transient outward potassium current in ICC

American Journal of Physiology-Gastrointestinal and Liver Physiology, 2010
Interstitial cells of Cajal (ICC) are the pacemakers of the gut, initiating slow-wave activity. Several ion channels have been identified that contribute to the depolarization phase of the slow wave. Our aim was to contribute to knowledge about the identity and role of ICC potassium channels in pacemaking.
Sean P, Parsons, Jan D, Huizinga
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Transient Currents in Schefflera Stems

IEEE Transactions on Electrical Insulation, 1986
The long-term transient and steady-state currents produced in Schefflera stems by polarizing voltage steps of various amplitudes, and the subsequent depolarization currents, are investigated. Concurrent measurement of the voltage drops in the vicinity of the positive and negative electrodes permits the elimination of the electrode impedances.
F. X. Hart, D. E. Brumgard
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Nature of transient currents in polymers

Journal of Applied Physics, 1978
Transient charging and discharging currents were measured in several polymers from room temperature to the glass transition temperature, and the effect of varying parameters such as field strength, electrode material, sample thickness, method of polymer preparation, and addition of impurities was investigated in some of them.
J. Vanderschueren, A. Linkens
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Current Transients in Insulators

Journal of Applied Physics, 1965
Electronic currents in insulators are strongly controlled by trap sites and therefore trapping can account for long-term charge and discharge currents. Some general calculations are carried out for the discharge of disorderly insulators; in most cases the discharge current decreases inversely with time. Measurements are demonstrated for SiO2 and SiO.
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Thermal current transients in polyethylene

Journal of Electrostatics, 1983
Abstract A thermal current transient technique, using a step input of radiations, has been employed in this work to study the nature of induced polarization in untreated and hexanetreated (commercial) low-density polyethylene film as a function of charging fields.
D.K. Das-Gupta, J.S. Duffy, D.E. Cooper
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Transient current measurements in polyimide

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1986, 1986
Polyimides are a group of polymers with excellent insulating properties such as low conductivity (comparable to SiO 2 and Al 2 O 3 ) high breakdown field strength (−3MVcm−1) and a high chemical stability. Therefore they are often used in microelectronic devices as well as in energy electronics.
H. Kliem, B. Schumacher, G. Arlt
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Transient Coastal Currents

1982
In the context of the coastal circulation problem, ‘transient’ currents will be taken to mean wind-induced motions of a time scale much longer than f −1, but shorter than the time in which bottom friction comes to control the pattern of flow. The foregoing three chapters have developed simple theoretical models for gaining physical insight into the ...
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Transient Compensation of Current Transformers

IEEE Transactions on Power Apparatus and Systems, 1978
The existence of a siqnificant exponentially decaying dc transient in the primary current of a conventional current transformer leads to large transient values of core flux. Protective scheme design is therefore subjected to constraints, either that ct saturation be tolerated or that larger ct's incapable of saturation be provided.
D.A. Bradley, C.B. Gray, D. O'Kelly
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Current Transients in Potassium Chloride

Nature, 1966
A PRELIMINARY investigation has been carried out of current transients in potassium chloride at 150° C. The specimens used were single crystals of AnalaR grade, supplied by Hilger and Watts, Ltd.—the slab size being about 2.5 cm square and 0.4 cm thick.
J. R. HANSCOMB, K. C. KAO, J. H. CALDERWOOD   +2 more
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