A. Acharyya, P. Sen, E. Chakraborty, P. Sarkar, N. Banerjee, R. Dey, A. R. Mondal, S. Chatterjee & T. K. Sengupta·Physical Science International Journal·2014
In this paper, the authors have proposed a new method for speed control of DC motor drives via modified constant frequency-variable duty (CFVD) pulse width modulation (PWM) technique. The armature of the DC motor rotating in very low speed has to accept abrupt mechanical shocks (...
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Research Article10.9734/PSIJ/2014/9905
Zitterbewegung is the quiver motion discovered by Schroedinger in his 1930 solution of the time-dependent Dirac equation for a free electron. The origin of Zitterbewegung is the interference between positive-energy and negative-energy states. Zitterbewegung is predicted to exist...
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Research Article10.9734/PSIJ/2014/6994
Light transmission in the Sun-Centered Inertial (SCI) frame is considered within a flat space-time metric of relativity theory. It is shown that this metric which is used to derive the Langevin metric that generates the accurate clock synchronization algorithm used in the Global...
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Research Article10.9734/PSIJ/2014/7783
A one- parameter family of totally anisotropic Bianchi type-II string cosmological models with bulk viscous fluid in Lyra geometry is investigated. Exact solutions of Einstein field equations have been obtained by constraining the the constant deceleration parameter which yields...
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Research Article10.9734/PSIJ/2014/8665
Magnetohydrodynamic mixed convection boundary layer flow of a nanofluid near the stagnation-point on a vertical plate with heat generation is investigated for both assisting and opposing flows are well thought-out. Different types of nanoparticles as copper (Cu), alumina (Al2O3)...
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Research Article10.9734/PSIJ/2014/9074
Bianchi type-III model of universe filled with a magnetized perfect fluid together with a time-varying cosmological constant is investigated in general relativity. We assume that F12 is the only non-vanishing component of the electromagnetic tensor Fij . We obtain exact solutions...
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Research Article10.9734/PSIJ/2014/8403
Aims: To investigate the dielectric and electrical properties of nanocomposite films for their application as high-k capacitors Study Design: The ferroelectric polymer PVDF is doped with ZnO nanoparticles (ZnO-NP) to study the dielectric properties Place and Duration of Study: Ma...
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Research Article10.9734/PSIJ/2014/9026
The radial flux density in the air-gap of rotating machines sets up a force of attraction between the stator and the rotor surfaces. In a symmetrical machine, the radial stresses distributions are balanced resulting in zero net force on the rotor. However, if the rotor of a rotat...
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Research Article10.9734/PSIJ/2014/5713
In this paper, a plasma electrolytic oxidation (PEO) coating was prepared on AZ91 magnesium (Mg) implant to improve its degradation resistance, bioactivity and biocompatibility. The phase composition and surface morphology of the samples were characterized using X-ray diffraction...
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Research Article10.9734/PSIJ/2014/9265
The optical functions and effective masses of electrons and holes of ternary compound InGaTe2 crystallizing in a tetragonal syngony are calculated in the energy interval 0-12eV using pseudo-potential method. Imaginary and real parts of dielectric permeability, optical conductivit...
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Research Article10.9734/PSIJ/2014/7555
In this paper, we get the set of symmetry of Plateau differential equation. Using Lie symmetry method to obtain the classical symmetry operators. Also, we get one-dimensional optimal system of the Plateau equation and reduction Lie invariants, corresponding to infinitesimal symme...
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Research Article10.9734/PSIJ/2014/6746
At the pressures 0.5-3 atm of the air, nitrogen, argon and sulfur hexafluoride (SF6) an appearance of the nanosecond discharge in the nonuniform electric field is investigated. In all gases at the negative polarity of the voltage pulses, supershort avalanches electron beam (SAEB)...
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Research Article10.9734/PSIJ/2014/8590
A numerical computer model based on the dual reciprocity boundary element method (DRBEM) is extended to study the generalized thermoelastic responses of functionally graded anisotropic rotating plates. In the case of plane deformation, a predictor-corrector implicit-explicit time...
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Research Article10.9734/PSIJ/2014/7403
The radiation produced by nanosecond repetitive pulsed discharges in nitrogen, air and argon was studied, including its study with a CCD camera. It is shown that within the first nanosecond, diffuse plasma covers the lateral surface of a conical cathode at relatively low electric...
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Research Article10.9734/PSIJ/2014/8589
Local transport properties of laser irradiated ZnTe thin films are reported. By rastering the laser beam (of 532 nm wavelength) appropriately, ZnTe decomposes into n-type ZnTe and Te and a grating like structure with micro-stripes of ZnTe separated by grooves of Te is obtained....
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Research Article10.9734/PSIJ/2014/5907