Single-phase squirrel cage and three-phase induction electromotors are the most popular electromotors used in industry from long ago. When an induction motor starts with direct connection method, it takes a lot of current from the power supply (several times the nominal current); so, several methods have been devised to start such electromotors. These methods either reduce the voltage of the st...

This paper shows a new numerical technique for the FEM calculation of the electromagnetic torque in a rotating electric machine. This is an extension of the well-known Maxwell stress tensor method, applied to circular paths that lie entirely in the airgap of rotating machines. Applications allow to evaluate the effectiveness of the method.

In order to explore the bioelectric effect of 5 ns pulsed electric fields on tumor cells, a spherical single-cell multiphysics model was first established based finite element simulation platform. consideration dielectric relaxation biological plasma membrane under high-frequency fields, electroporation and Maxwell stress tensors cell nuclear envelope were analyzed; secondly, taking MDA-MB-231 ...

We carry out a comprehensive analysis of the behavior of the magnetorotational instability (MRI) in viscous, resistive plasmas. We find exact, non-linear solutions of the non-ideal magnetohydrodynamic (MHD) equations describing the local dynamics of an incompressible, differentially rotating background threaded by a vertical magnetic field when disturbances with wavenumbers perpendicular to the...

a foodstuff response evaluating at different forces such as shear, compress, tensile and chewing force is in fact product texture evaluating which is relying on rheological characteristic. in this research, the relaxation behavior of various chicken parts was perused based on generalized maxwell model at different regimes. the effects of three types of treatments as control (without additives),...

We deal with the “nonrelativistic limit”, i.e. the limit c → ∞, where c is the speed of light, of the nonlinear PDE system obtained by coupling the Dirac equation for a 4-spinor to the Maxwell equations for the self-consistent field created by the “moving charge” of the spinor. This limit, sometimes also called “Post-Newtonian” limit, yields a SchrödingerPoisson system, where the spin and the m...

As a matter of fact, the solution space of many systems of ordinary differential (OD) or partial differential (PD) equations in engineering or mathematical physics ”can/cannot” be parametrized by a certain number of arbitrary functions behaving like ”potentials”. In view of the explicit examples to be met later on, it must be noticed that the parametrizing operator, though often of the first or...

Graphic statics is undergoing a renaissance, with computerized visual representation becoming both easier and more spectacular as time passes. While methods of the past are revived, little emphasis has been placed on studying mathematics behind these methods. Due to considerable advances our mathematical understanding since birth graphic statics, we can learn lot by examining old from modern vi...

The present study introduces a macroscopic thermodynamic methodology to quantify entropy change in a human physiological system using Maxwell relations. This approach combines three physiological measures (mean arterial pressure, heart rate, and finger skin temperature) to provide a measure of entropy change (ΔS). The experimental data was collected from a study that included eighty-two subject...