نتایج جستجو برای: voltage gradient
تعداد نتایج: 232620 فیلتر نتایج به سال:
2014 We consider a random resistor network on a square lattice at the bond percolation threshold pc = 1/2. We calculate the current distribution on the incipient infinite cluster using a Fourier accelerated conjugate gradient method. We compute the n-th moment of this distribution in both the constant current and constant voltage ensembles for lattices up to 256 x 256 in size, and examine how t...
Membrane transport pathways mediating transcellular secretion of urate across the proximal tubule were investigated in brush-border membrane vesicles (BBMV) isolated from avian kidney. An inside-positive K diffusion potential induced a conductive uptake of urate to levels exceeding equilibrium. Protonophore-induced dissipation of membrane potential significantly reduced voltage-driven urate upt...
A gradient of bone morphogenetic proteins (BMPs) along the dorsoventral axis of the spinal cord is necessary for the specification of dorsal neurons. Concurrently, a gradient of calcium-mediated electrical activity is present in the developing spinal cord but in an opposing ventrodorsal direction. Whether BMPs and electrical activity interact in embryonic spinal neurons remains unknown. We show...
Whether a disturbance will trigger unexpected protection operation to exacerbate the normal operation state or even lead to the unstable state depends on the transient energy that the system gains during the fault period. The paper presents a new gradient projection approach to calculate the critical energy for transient stability assessment of the power system with the protection operation. Th...
The spin Seebeck effect, the generation of a spin current by a temperature gradient, has attracted great attention, but the interplay over a millimetre range along a thin ferromagnetic film as well as unintended side effects which hinder an unambiguous detection have evoked controversial discussions. Here, we investigate the inverse spin Hall voltage of a 10 nm thin Pt strip deposited on the ma...
By correcting the photon area factor (PAF) to suit structure of spacer and redefining effective ionization region process negative corona onset, a physical model for calculation COG AC spacers is established. The validity practicability established are validated by onset test results in both low-altitude high-altitude areas. numerical pertaining PAF consistent with theoretical analysis. With as...
BACKGROUND Defibrillation may be improved if electrode configurations can be found that create a larger and more even voltage gradient field across the heart. This study determined the magnitude of the shock gradient fields generated by four nonthoracotomy electrode configurations for defibrillation. METHODS AND RESULTS In six dogs, a catheter was inserted containing a right ventricular apica...
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