Estimate Of Capacitance
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Vibration energy harvesting using piezoelectric transducer and non-controlled rectifiers circuits
Vibration energy harvesting with piezoelectric materials is of practical interest because of the demand for wireless sensing devices and low-power portable electronics without external power supply. For practical use of vibration energy harvester with piezoelectric materials, it is necessary to process the alternating current (AC) by using different rectifie
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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2. Simulação semi-empírica de refrigeradores domésticos : [dissertação]
In this work a computer program to simulate the thermodynamic performance of a specific household refrigerator, running both in steady-state and in cycling transient conditions, was developed. The computer program was developed based on the fundamentals principles of mass, energy and momentum conservation. Empirical parameters derived from experiments were i
Publicado em: 2009
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3. Propriedades dielétricas e térmicas das blendas de poliestireno com ácido oléico e polietireno com betacaroteno / Properties dielétricas and thermal of the blends of polystyrene with oleic acid and polietireno with Beta-Carotene
The thermal, dielectrics and optics properties of vegetable oils have been studied by Amazonian Materials Physic Group since 1996 in the Department of Physic of UFPA. Recently collaboration with Physical-chemistry of polymer Laboratory in the Chemistry Institute of UnB allowed studying these oils and its components as polymeric blends. In this work, we searc
Publicado em: 2008
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4. NEW METHODOLOGY TO THE ESTIMATIVE OF CAPACITANCE AND POWER CONSUMPTION OF COMPLEX LOGIC GATES CMOS AT LOGIC LEVEL / NOVA METODOLOGIA PARA A ESTIMATIVA DE CAPACITÂNCIA E CONSUMO DE POTÊNCIA DE PORTAS LÓGICAS COMPLEXAS CMOS NO NÍVEL LÓGICO
This dissertation presents a methodology of capacitance estimation and power consumption in CMOS circuits combinational constituted basically of complex logic gates at logic level. The main objective in the development of this method is to provide a fast estimate of the power consumption of circuits at the logical design gates. Of this form, the considered m
Publicado em: 2005
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5. Rapid exocytosis and endocytosis in nerve terminals of the rat posterior pituitary.
1. Ca(2+)-induced exocytosis and endocytosis were studied by measuring the membrane capacitance of voltage-clamped peptidergic nerve terminals in slices prepared from the rat posterior pituitary. 2. Depolarizing pulses produced rapid increases in capacitance. These increases varied in parallel with Ca2+ current as voltage was varied. Elimination of Ca2+ curr
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6. Effect of insulin on area and Na+ channel density of apical membrane of cultured toad kidney cells.
1. The stimulation of transepithelial Na+ transport caused by insulin in A6 cultured toad kidney cells was investigated by determination of membrane capacitance (Cm), short circuit current (Isc) and current fluctuation analysis. Values of Cm are proportional to membrane area while blocker-induced current fluctuation analysis provides an estimate of the numbe
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7. Intramembrane charge movement in frog skeletal muscle fibres. Properties of charge 2.
1. Membrane currents were measured in cut skeletal muscle fibres voltage-clamped in a double Vaseline gap in solutions that had impermeant ions substituted for Na+, K+ and Cl-. The fibres were maintained at a holding potential of 0 mV. Pulses to positive voltages elicited outward currents that were proportional to voltage at all times; these were used to est
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8. Theory of electroporation of planar bilayer membranes: predictions of the aqueous area, change in capacitance, and pore-pore separation.
A large increase in the transmembrane voltage, U(t), of a fluid bilayer membrane is believed to result in the occurrence of temporary aqueous pathways ("pores") across the membrane. The number, size, and evolution dynamics of these pores are expected to be crucial to the transport of water-soluble species ranging from small ions to macromolecules such as pro
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9. Time course of Ca2+ concentration triggering exocytosis in neuroendocrine cells.
We have used the secretory response of chromaffin cells to estimate the submembrane intracellular Ca2+ concentration ([Ca2+]i) "seen" by secretory granules during short depolarizations. The rate of secretion during a depolarization was assessed by combining the electrochemical method of amperometry and electrical capacitance measurements. The rate was then r
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10. In vivo measurement of axon diameter distribution in the corpus callosum of rat brain
Here, we present the first in vivo non-invasive measurement of the axon diameter distribution in the rat corpus callosum. Previously, this measurement was only possible using invasive histological methods. The axon diameter, along with other physical properties, such as the intra-axonal resistance, membrane resistance and capacitance etc. helps determine man
Oxford University Press.