نتایج جستجو برای: electrical current
تعداد نتایج: 945763 فیلتر نتایج به سال:
In this paper, the Y1-xCdxBa2Cu3O7-δ superconductor with x=0, 0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5 are prepared using the solid state method and the structure, electrical resistance, critical current density and critical temperature of it, have been studied. The results show that these doping do not affect so much on the structure and lattice parameters. The electrical resistance of samples incr...
In this work, a tracer study on pore initiation in anodic alumina in oxalic acid was performed. Effects of some experimental parameters such as applied electrical potential, electrolyte composition and heat pretreatment were evaluated. Electrochemical and morphological experiments were performed using potentiostatic anodizing and scanning electron microscopy (SEM) techniques, respectively. Effe...
Abstract: The purpose of this study is to present a 2-D numerical model that solves the transient equations of flow, energy and species conservation in a single tubular solid oxide fuel cell (SOFC). Also an electrical model is considered to compute the electrical potential and current distribution in the cell. Using this comprehensive model the cell dynamic operation and response in a step lo...
In this contribution, we report on the application of a novel, high accuracy, arc characterization method to wall constricted arcs in cylindrical nozzles with low blow pressure. The method makes use of a novel current source that is able to produce nearly arbitrary current shapes. With it, it is possible to derive the stationary and transient arc characteristic independent of each other but wit...
The Resistance Spot Welding (RSW) process requires simultaneous application of high electrical current and appropriate pressure over short periods in order to keep the molten material inside the weld zone. Values of these parameters vary in function of the characteristics of the materials to be welded. The application of the electrical current is by means of two copper electrodes brought in con...
Transcranial direct current stimulation (tDCS), a non-invasive brain stimulation technique, modulates neuronal excitability by the application of a small electrical current. The low cost and ease of the technique has driven interest in potential clinical applications. However, outcomes are highly sensitive to stimulation parameters, leading to difficulty maximizing the technique's effectiveness...
OF THE DISCLOSURE A method and device are provided for affinity gradient focusing for directing at least one analyte in a solution containing a pseudostationary phase and located in a conduit or microchannel. The method includes establishing a gradient in a retention factor of the pseudostationary phase for the at least one analyte. The analyte is caused to be moved within the conduit whereby t...
The expressions for the electromagnetic field generated by an arbitrary current source in an anisotropic medium are calculated by the method of Fourier analysis. The radiation emitted by a charged particle moving in a helical orbit of uniform pitch in a magnetoionic medium is evaluated.
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