abstract wenner direct contact method is a method of estimating apparent electrical conductivity (eca) of agricultural soils in situ. this method can be affected by factors such as quality of electrodes in contact with soil, type of employed electric current, moisture content, clay content and compaction of soil. in this research, the effect of electrode type (rod and plate) and electric curren...

Problems of electromagnetic interference (EMI) between electronic devices are becoming more and more serious because operating clock frequency of electronic devices is increasing rapidly and high-density printed circuit board (PCB) technologies have been widely applied to the PCB design for the past few years. In order to suppress the EMI between electronic devices, it is important to know elec...

Electric fields have been widely used for the treatment of neurological diseases, using techniques such as non-invasive brain stimulation. An electric current controls cell excitability by imposing voltage changes across the cell membrane. At the same time, the presence of the cell itself causes a re-distribution of the local electric field. Computation of the electric field distribution at a s...

Can a steady current distribution contain a nonzero total mechanical momentum, often called hidden momentum [1, 2, 3, 4, 5, 7, 6, 8, 9, 10, 11, 12, 13], due to the motion of the charge carriers? A steady current distribution Jsteady(r) is one with no time dependence. If the current density Jsteady flows in conductors, they must be at rest. The divergence of a steady current distribution has no ...

in the present study, a model of a large lithium polymer (li-po) battery for use in the simulation of hybrid electric vehicles (hevs) is developed. to attain this goal, an equivalent circuit (ec) consisting of a series resistor and two rc parallel networks is considered. the accuracy and the response time of the model for use in an hev simulator are studied. the battery parameters identificatio...

Electric power distribution system is an important part of electrical power systems in delivery of electricity to consumers. Automation in the distribution field allows utilities to implement flexible control of distribution systems, which can be used to enhance efficiency, reliability, and quality of electric service. Presently, worldwide research and development efforts are focused in the are...

To simulate a new economical architecture for PEM fuel cell and investigate the effectiveness of the introduced structure on the performance, computational fluid dynamics (CFD) code is used to solve the equations for a single domain of the cell namely: the flow field, the mass conservation, the energy conservation, the species transport, and the electric/ionic fields under the assumptions of st...