Evaluation of Valance Force Constant for Terahalides Applying the Effective Nuclear Charge Model – Ruby Yadav, Pradeep Kumar Yadav and Sanjay Kumar Singh.
Evaluation of Valance Force Constant for Terahalides Applying the Effective Nuclear Charge Model
Ruby Yadav1, Pradeep Kumar Yadav2,* and Sanjay Kumar Singh3
1,2Physics Department, Meerut College, Meerut, U.P., India.
3Directorate of Higher Education, U.P., Prayagraj, India.
*email: yadav62pk@gmail.com
In the present article, the effective nuclear charge model is used to compute the valence force constants for tetrahedral molecules. The experimental force constants determined by normal co-ordinate analysis are compared with the computed results. The agreement between the results, are found to be reasonably good and hence, it is concluded that the said model is successful to predict the approximated valence force constants in complicated polyatomic molecules.
Keywords: Tetrahedral, valance force, nuclear charge.
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Temperature Dependence of Electrical Resistivity for pure and Ag Doped Bi-Pb-Sr-Ca-Cu-O Superconductor – Dr. Pawan Kumar.
Temperature Dependence of Electrical Resistivity for pure and Ag Doped Bi-Pb-Sr-Ca-Cu-O Superconductor
Dr. Pawan Kumar
Associate Prof., Department of Physics, A.S. (P.G.) College,Sikandrabad, U.P., India.
The temperature dependent resistance of pure and Ag doped Bi-Pb-Sr-Ca-Cu-O has been observed. It has been found that Ag additions to Bi-Pb-Sr-Ca-Cu-O depress Tc and Jc drestically and cause a large decrease in lattice parameters when samples are treated in air or pure oxygen. However, the lattice parameters Tc and Jc remain unaffected by Ag additions when samples heated in 0.030-0.067 atm oxygen. It is clear that the Ag reacts with and destabilises the superconducting phase when the samples are treated in air or pure oxygen while, when the samples are heated in low oxygen partial pressures, the Ag remains as an isolated inert metal phase that improves the week links between the grains.
Keywords: Electrical Resistivity, ceramics, superconductivity.
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Study of Chemically Synthesized Nanocomposite Copolymer of 3,4-dimethyl Pyrrole and 2-ethyl Aniline – Rajeev Rathore, Ajay Chauhan and Pradeep Kumar Yadav.
Study of Chemically Synthesized Nanocomposite Copolymer of 3,4-dimethyl Pyrrole and 2-ethyl Aniline
Rajeev Rathore1, Ajay Chauhan2,* and Pradeep Kumar Yadav2
1Chemistry Department, Meerut College, Meerut, U.P., India.
2Physics Department, Meerut College, Meerut, U.P., India.
*email: cajaymcm@gmail.com
Chemically synthesized Copolymer nanocomposite of 3,4-dimethyl pyrrole (DMPy) and 2-ethyl aniline (EA) using chemical oxidative polymerization doped with HCl and Ammonium persulfate (APS) used as an oxidant was characterized for structural configurations by UV-Vis, FTIR, TGA and XRD. Four probe method was adopted for the measurement of electrical conductivity. Spectroscopy confirms the p-p* transition in nanocomposite copolymer. FTIR confirms the formation of copolymer and its structure. XRD analysis shows the amorphous nature of polymer nanocomposite. The electrical conductivity of sample was comparable to the intrinsic conductive polymers used. Size and surface morphology was demonstrated by SEM.
Key words: Nanocomposite, Copolymer, XRD, TGA, SEM, Four probe method.
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The Fluctuating Superconducting Transitions in Granitoids Rock BPY-1 Crystals – Pawan Kumar and Vaibhav Jain.
The Fluctuating Superconducting Transitions in Granitoids Rock BPY-1 Crystals
Pawan Kumar1,* and Vaibhav Jain2
1,*Associate Prof., Department of Physics, A.S. (P.G.) College, Sikanderabad, U.P., India.
2Associate Prof., Department of Physics, DAV (P.G.) College, Bulandshahr, U.P., India.
The temperature dependent conductivity had been recorded in georock crystal BPY-1 alongwith RF stimulated Hall effects. The surprising features of the study had been discussed.
Keywords: Conductivity, RF stimulated Hall effect.
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Redundancy Optimization of a System under the Fault-tolerant System – Chetan Kumar Sharma.
Redundancy Optimization of a System under the Fault-tolerant System
Chetan Kumar Sharma
Assistant Professor, Department of Mathematics
Skyline Institute of Engineering & Technology, Greater Noida, U.P., India
Email: cks26april@gmail.com
Fault-tolerance is the property that enables a system to continue operating properly in the event of the failure of (or one or more faults within) some of its components. Fault-tolerance is particular sought after in high-availability or life-critical system. A fault tolerant design enables a system to continue its intended operation possibly at a reduced level, rather than falling completely, when some part of the system fails. In this paper we discuss the redundancy optimal system size with the reliability evaluation of a system of components.
Keywords: Fault-tolerant, Reliability Evaluation, Parallel System, Probability, Minimize Average Cost, Hardware & Software Redundant.
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