A: Physics & Space Science (178)
GJSFR: A
Study of additional heating Systems by Electron cyclotron and Alfven waves in Tokamak Machine
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
Electron cyclotron (EC) absorption in tokamak plasma is based on interaction between wave and electron cyclotron movement when the electron passes through a layer of resonance at a fixed frequency and dependent magnetic field. This technique is the principle of additional heating (ECRH) and the generation of non-inductive current drive (ECCD) in modern fusion devices. In this paper we ar...
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Authors Dr. Naima Ghoutia Sabri , Tayeb BenouazRead Journal Click Here
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Page No. 63 to 71
Effect of Heat Treatment on the Formation and Distribution of Dispersoid Particles in AlMgSi
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
In this paper we studied the effect of heat treatment on the formation and distribution of dispersoid particles which were formed as a function of heat treatment in AlMgSi alloy containing transition elements in AlMgSi alloy which contained the transition elements such as Mn and Cr. The extrapolation technique of Cliff et al (1983) has been used to determine the composition of dispersoid...
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Authors FARH Hichem , GUITOUME Djamal Eddine, DJEMMALl Karim , GUEMINI rebai , SERRADJ faresRead Journal Click Here
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Page No. 45 to 47
Study of High Pressure Structural, Mechanical and Thermal Properties of SrS1-xSex, SrS1-xTex and SrSe1-xTex Ternary Alloys
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
We have developed a new model to study the structural, mechanical and thermal properties of SrS1-xSex, SrS1-xTex and SrSe1-xTex ternary alloys. This model includes the Coulomb interaction, TBI interaction, vander Waal interaction overlap repulsive interactions extended up to the second neighbour ions and covalent interaction. The variation of Gibb’s free energy, phase tr...
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Authors Dr. Purvee BhardwajRead Journal Click Here
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Page No. 49 to 57
Empirical Model For The Estimation Of Global Solar Radiation In Makurdi, Nigeria
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
This work proposes the coefficients for Angstrom - Prescott type of model for the estimation of global solar radiation in Makurdi, Nigeria using relative sunshine duration alongside the measured global solar radiation data (2001-2010). The model constants a and b obtained in this investigation for Makurdi are .138 and 0.488 respectively. The correlation coefficient of 89% (P=0.00) betwee...
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Authors Dr. Isikwue, B.C.,Amah, A.N.,Agada, P. ORead Journal Click Here
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Page No. 59 to 61
X-Ray window simulation; the use of COMSOL 3.4 Multiphysics software
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
Ways are sought after, to prevent overlying target material on membrane from breaking or melting, by simulating structures (using COMSOL 3.4 Multiphysics software) of various materials. Results of these simulations and graphs (using Origin 7.5 software) are presented. The implications conferred by these graphs on the report are discussed. Power densities, of impinging electrons, thermal ...
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Authors Dr. Dikedi P.N.Read Journal Click Here
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Page No. 1 to 7
Estimating the Speed of rotation of a rotating X-Ray window
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
A rotating membrane is assumed to be a rotating disc and appropriate speed of rotation is a key consideration if the material in question must survive the heat flux imparted on it by impinging beam of electrons. 1μm hot spots are assumed to be distributed on the target material such that a circular pattern is formed according to figure 1 . ...
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Authors Dikedi P.N.Read Journal Click Here
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Page No. 79 to 80
Foundation of vortex gravitation, cosmology and cosmogony
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
A hypothesis is proposed concerning the cause of the origin of universal gravitation. This cause consists in a system of the ether vortex rotations. Physical and mathematical grounds are described and the formula for the determination of the space gravitation forces is deduced. On the basis of the vortex gravitation, the principles of creation and existence of the celestial bodies are sh...
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Authors Dr. SergeyOrlovRead Journal Click Here
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Page No. 15 to 34
Static Characterization of InAs/AlGaAs Broadband Self-Assembled Quantum Dot Lasers
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
In this paper we have studied the static-characteristics of InAs/AlGaAs broadband selfassembled quantum-dot laser diodes (SAQD-LDs) solving the rate equations numerically using fourth-order Runge-Kutta method. Energy level, size, and composition distributions of the InAs/AlGaAs broadband quantum-dots (QDs) are considered and their effects on Staticcharacteristics are investigated. Simula...
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Authors D. Ghodsi Nahri,H. ArabshahiRead Journal Click Here
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Page No. 73 to 77
Dynamic Characterization of InAs/AlGaAs Broadband self-Assembled Quantum Dot Lasers
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
In this research we have solved the rate equations for InAs/AlGaAs broadband selfassembled quantum dot (QD) laser with considering the homogeneous broadening (HB) and inhomogeneous broadening (IHB) of the linear optical gain using fourth order Runge-Kutta method. We show that enhancing the injected current results in improving the dynamic characteristics, and increasing the steady-state ...
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Authors D. Ghodsi Nahri,H. ArabshahiRead Journal Click Here
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Page No. 9 to 14
Deformation due to various sources in micropolar elastic solid with voids under inviscid liquid half space
Published In: GJSFR Part: A: Physics & Space Science Volume: 12 Issue: 1
The present investigation deals with the deformation of a micropolar elastic solid with void overlying a semi-infinite inviscid fluid subjected at the plane interface due to various sources. Laplace and Fourier transform techniques have been used to solve the problem. The expressions of the displacement components, stress, couple stress and change in volume fraction field are obtained in...
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Authors Rajneesh Kumara,K.D.Sharmab,S.K.GargRead Journal Click Here
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Page No. 35 to 44
