نتایج جستجو برای: electric conduction
تعداد نتایج: 179575 فیلتر نتایج به سال:
In two series of conscious healthy dogs, a study of duodenal electric activity was made to locate the pacemaker or site of the greatest intrinsic frequency of the pacesetter potential. In three dogs, an annular myotomy of the duodenum about 1 cm proximal (orad) to the biliary ampulla caused a reduction in the frequency of the pacesetter potential distal (caudad) to the conduction block and demo...
Stationary DC electric fields are determined by the resistivity distribution of the insulation materials. In the presence of interfaces between different insulation materials, charge accumulation at these boundary layers may have a significant influence on the electric field distribution and with it on the breakdown strength of the arrangement. In many previous works, surface charging of model ...
Conduction slowing of the electric impulse that drives the heartbeat may evoke lethal cardiac arrhythmias. Mutations in SCN5A, which encodes the pore-forming cardiac sodium channel alpha subunit, are associated with familial arrhythmia syndromes based on conduction slowing. However, disease severity among mutation carriers is highly variable. We hypothesized that genetic modifiers underlie the ...
A mathematical model was developed for ionic conduction in amorphous oxide films. The model is based on a hypothesized “defect cluster” mechanism in which both metal and oxygen ions are involved in transport. Defect clusters are created by inward displacement of oxygen ions around an oxygen vacancy‐like defect in response to the vacancy's electric field. Metal ions are assumed to migrate easily...
Electricfield distributions measured using the Kerr effect cause a phase,shift between light components polarized parallel and perpendicular to the electric field, proportional to the magnitude sqyared of the electric field components in the plane perpendicdar to light propagation integrated over the light path length. One wishes to recover the electric field distribution from m4asurements of l...
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