Results 221 to 230 of about 3,139,121 (251)

Scaling in Pressure Stimulated Currents related with rock fracture

Physica A: Statistical Mechanics and its Applications, 2008
Abstract The application of uniaxial stress in rocks is accompanied by the production of an electric signal which described by the term Pressure Stimulated Current (PSC). Here we present a statistical analysis of PSC time series from rock fracture experiments obtained from samples of calcite and cement mortar materials.
F. Vallianatos, D. Triantis
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Is pressure stimulated current relaxation in amphibolite a case of non-extensivity?

EPL (Europhysics Letters), 2012
The application of uniaxial stress on rocks is accompanied by the production of an electric signal which is described by the term pressure stimulated current (PSC). In this work the high rate step stress (HRSS) technique is applied, and the PSC relaxation in amphibolite samples from KTB drilling, is studied in the frame of non-extensive statistical ...
Filippos Vallianatos, Dimos Triantis
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Comments on the phenomena underlying pressure stimulated currents in dielectric rock materials

Journal of Materials Science, 2007
It has been observed that there is a systematic detection of weak pressure stimulated electric currents (PSC) in polycrystalline and amorphous solids during or after an application of mechanical stress upon them. An interpretation of the mechanisms governing the electrical behaviour of solid structures when they undergo uniaxial stress tests is ...
C. Anastasiadis, D. Triantis, C. A. Hogarth   +2 more
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Decrease in blood pressure by stimulation of the rat hypothalamic paraventricular nucleus with l-glutamate or weak current

Journal of the Autonomic Nervous System, 1987
Effects of electrical and chemical stimulation of the paraventricular nucleus (PVN) of the hypothalamus on blood pressure were examined in rats anesthetized with urethane-chloralose. Focal electrical stimulation (10-25 microA, 50 Hz, 0.5 ms) of sites within the PVN consistently decreased blood pressure, while the stimulation of regions adjacent to the ...
H, Yamashita, H, Kannan, M, Kasai, T, Osaka   +3 more
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Determination of dielectric relaxation time as a function of pressure and temperature by the thermally stimulated current method

Applied Physics Letters, 1979
The thermally stimulated current (TSC) has been used over a wide range of pressure to determine the principal characteristics of the polymers such as the activation volume ΔV, the activation energy ΔE, and the preexponential term τ0 of the Arrhenius-type relaxation time: τ=τ0 exp[(PΔV+ΔE)/kT].
Bui Ai, Corina Popescu Stoka, Hoang The Giam, Pierre Destruel   +3 more
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An in vitro pressure ulcer approach using High Voltage Pulsed Current (HVPC) stimulation

Gerontechnology, 2014
Purpose Immobilization will lead to pressure ulcers. The breadth and depth of impacts related to having a pressure ulcer on quality of life is significant in a physical, psychological, emotional, spiritual, social, and financial sense. In Indonesia, one study reported pressure ulcers in 72 of 253 patients (28%).
D. Herminawaty, I.R. Defi, T. Prabowo, I. Parwati   +3 more
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Center of Pressure Periodic Displacement with Alternate Current Unilateral Vestibular Stimulation

2019
Various studies describe the postural response and ocular movements produced by transmastoid galvanic vestibular stimulation (GVS). To take advantage of this response in a noninvasive vestibular prosthesis, a unilateral configuration would be a practical design for users.
Pliego Adriana, Vega Rosario, Soto Enrique   +2 more
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Stimulated VUV emission in high-pressure xenon excited by high-current relativistic electron beams

Applied Physics Letters, 1972
Vacuum ultraviolet (VUV) emission characteristics of xenon for pressures from 15 to 450 psi are presented. Stimulated emission was observed above 200 psi. Experiments were run both with and without mirrors. Without mirrors, the emission was 150 Å wide centered at 1700 Å, and the mean radiative lifetime was 2×10−8. The energy conversion efficiency was ∼
H.A. Koehler, L.J. Ferderber, D.L. Redhead, P.J. Ebert   +3 more
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Separation of gas phase and electron-stimulated-desorption ions in the modulated-ion-current pressure gauge

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1987
The behavior of gas phase and electron-stimulated-desorption ions in the modulated-ion-current pressure gauge is described. In order to obtain optimum separation of the two ion peaks, electron energy, shield grid potential, emission current, and various shapes of electron reflectors were examined. In addition, observations were made in the residual gas
F. Watanabe, H. Ishimaru
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Thermally-Stimulated Current of Zinc Selenide Heat-Treated in Controlled Partial Pressures of Constituent Elements

Japanese Journal of Applied Physics, 1980
The purpose of the present investigation is to obtain information on the trap levels related to native defects. TSC (thermally-stimulated current) measurements were made on vapor-grown ZnSe single crystals heat-treated in Zn or Se vapor in order to control the deviation from stoichiometry.
Shiro Satoh, Kenzo Igaki
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