Vol. 4 & Issue 2 ; Section C : Physical Sciences

Date : Feb. to Apr.2014

 

A Theoretical Evaluation of Temperature Variation of London Pen

Pankaj Kumar Sinha and Lalit Kumar Mishra

  • Abstract

    We have evaluated the temperature variation of London penetration depth ( ) ab Dl T for three superconductors Nb (Tc =9K), MgB2 (Tc =39K) and Bi2212 (Tc=90K). Our theoretical results indicate that ( ) ab Dl T increases with (T/Tc) in these superconductors as per experimental observation. We have also evaluated super fluid density ρs(T) for clean s-wave, clean d-wave and dirty d-wave superconductors. Our theoretical results indicate that ρs(T) decreases with T and become zero at T=Tc. Our theoretically evaluated results are in good agreement with the other theoretical workers.

A Theoretical Study of an Electromagnetic Response of Heavy Ele

Vijay Bahadur Prajapati, S. P. Tiwari and L. K. Mishra

  • Abstract

    In this paper, we have theoretically studied an electromagnetic response of heavy-electron compounds and evaluated its physical parameters like frequency dependent optical conductivity and effective mass. We have used two theoretical formalisms Millis and Lee and A. M. Awasthietal. Our evaluated theoretical results are in good agreement with other theoretical workers

Various Models of Traditional Solar Distillation System for Water Desalination – A Rev

N. Sri Gokilavani, D.Prabhakaran, T.Kannadasan

  • Abstract

    In developing countries, lack of safe and unreliable drinking water constitutes a major problem. The radiation from the sun evaporates water inside the solar still at a temperature higher. In this attempt has been made to review, in brief, work on solar distillation, and its present status in the world today. Many conventional and non-conventional techniques have been developed for water purification. Among these, solar distillation proves to be both economical and eco-friendly technique. The review also includes various models of distillation system for water purification. The classification of distillation units has been done on the basis of literature survey till today. Depending upon the climatic condition the system performance varies. Active and passive solar systems are discussed. Hybrid systems are optimum one for the place having less sunlight intensity.

An Evaluation of Optical Conductivity of Heavy-Electron Compoun

Gaurav Kumar, Anant Kumar Sinha and Lalit Kumar Mishra

  • Abstract

    An evaluation of real part of optical conductivity 1() as a function of  for heavy-electron compounds (prototype non- Fermi Kondo alloys) were performed at different temperature. Our evaluated results show that optical conductivity increases with frequency as per experimental observation but the magnitudes are smaller with the experimental data.

Spin –Orbit Coupling, Spin- Spin, and Electric Properties of Hydrogen Fluoride Molecul

Dhia Hamdi Al-Amiedy, Zeyad Adnan Saleh, Rajaa Khedir Al-Yasari

  • Abstract

    Research includes the study of the spin- orbit coupling, spin- spin, electronic structure and number of electric properties such as ionization potential(IP), electron affinity(EA), electron negativity (x), hardness( ), softness(S), and electrophilic(W)of hydrogen fluoride molecule by using Gaussian program 09 and Gauss view 5.08 program using density function (DFT) method B3LYP/6-311G (d,p).

Spectroscopic Characterization of Pyrrolizidine Alkaloid –&nbs

T. Lawrence & S Gunasekaran

  • Abstract

    The alkaloid pyrrolizidine is isolated by the organic high polar solvents from the plant leaf of Eupatorium glandulosum. To validate the significance of the species, the leaf extract of the plant was evaluated and characterized by FTIR, UV, and GCMS spectrum. Molecular structure is confirmed by the experimental values of fluorescence of IR, UV values of atomic stretching, possible functional groups and GCMS values and is estimated with the calculated measurements of mass spectrum, Gaussian (v3), IRPal 2.0 Tabledrivan software and Fluorine chemistry for calculated compound structural values.

A Banach Algebra of Functions Analytic in a Half Plane

B.L.Srivastava and Kirti Chauhan

  • Abstract

    In this paper, we have considered a class Ω(U) of functions represented by G.L.I., we have shown that this class is a well behaved non-uniformly convex Banach space. Under suitable multiplication, it is proved to be a commutative Banach algebra with identity. Regular, singular elements and TZD’s are also characterized.

Peristaltic Transport of a Conducting Fluid in an Asymmetric Ve

Rathod V.P and Laxmi Devindrappa

  • Abstract

    The effect of heat and mass transfer on the peristaltic transport of a conducting fluid in an asymmetric vertical channel is studied. The asymmetry channel is generated by propagation of waves on the channel walls travelling with different amplitudes, phases but with the same speed. The flow is examined in a wave frame of reference moving with the velocity of the wave and the resulting equations have then been simplified using the assumptions of long wavelength and low Reynolds number approximation. The reduced equations have been solved numerically by Adomian decomposition method and the exact solutions have also been computed for velocity, temperature and concentration. The effects of various parameters of interest on these formulas were discussed and illustrated graphically through a set of figures.

Some Theorems on Subspaces of Subspaces of a Kaehlerian Recurrent Space

U. S. Negi

  • Abstract

    Takahashi (1966) has studied in order for a submanifold Mn of an mdimensional Euclidean space Em to be a minimal submanifold, it is necessary and sufficient that the radius vector X satisfied ΔX=0, where Δ denotes the Laplacian in the submanifold Mn, i.e. all the (natural) co-ordinate functions are harmonic and a submanifold of a hypersphere with radius r of a Euclidean space is minimal, it is necessary and sufficient that the radius vector X satisfies ΔX = (-n / r2 )X, where n denotes the dimension of the submanifold. Further, Bang-Yen and Yano (1971) have studied a submanifold Mn of a submanifold Mm of a Riemannian manifold Ml being given, the conditions that Mn is minimal in Mm or that Mn is minimal in Ml and have obtained a theorem which generalizes two results above of Takahashi. Also, Singh and Singh (1978) have studied s

Temperature in Assam: Natural Extreme Value

Dhritikesh Chakrabarty

  • Abstract

    There are innumerable situations (and / or problems) where one can think of applying the theory of normal probability distribution, which plays a key role in the theory of statistics as well as in the application of statistics, to handle the situations (and / or to search for their solutions). This paper is based on a study made to search for some method of determining the natural maximum and the natural minimum of temperature at a location by the application of the area property of normal probability distribution. The method has been applied in determining the natural maximum and the natural minimum of temperature in the context of Assam.

Study of adulteration of milk by attenuation coefficient

L.M.Chaudhari and S.B.Girase

  • Abstract

    Milk is an important parameter to development of growth of human body. Now days some social anti elements are added like urea, lacto powder etc. in milk. This is very harmful for human bodies. We studied the adulterated milk samples using attenuation coefficients by varying concentration at different energies. This technique is also very important in the study of material and its analysis.

An Economic Reliability Test Plan for Type-I Generalized Half Logistic Distribution

K. Rosaiah, R.R.L. Kantam, V. Rama Krishna and D.C.U.Siva Kumar

  • Abstract

    The type-I generalized half-logistic distribution is considered as a probability model for the lifetime of the product. Reliability test plan with a new approach is developed to determine the termination time of the experiment for a given sample size,  producer’s risk and termination number. The present test plan is compared with similar  plans in literature with respect to time of the experiment.

Low-Lying Potential energy Curves of Copper Hydride molecule Us

Dhia Hamdi Al-Amiedy and Rana Saadi Ahmed

  • Abstract

    Diatomic molecule of Copper Hydride Cu63H1 has been studied theoretically for ground and excited states (X, A, B). It had been constructed potential curves for each state by using Morse function and five parameters functions to calculate potential curves with rotational effect, and the results have good agreement with experimental results.

LiMn2O4 Thin Films for Gas Sensing Application

M.C. Rao

  • Abstract

    The performance of current energy conversion and storage technologies falls short of requirements for the efficient use of electrical energy in transportation, commercial and residential applications. Materials have always played a critical role in energy production, conversion and storage and today there are even greater challenges to overcome if materials are to meet these higher performance demands. Lithiated transition-metal oxides such as LiCoO2, LiNiO2 and LiMn2O4 have received significant attention due to their industrial applications especially in rechargeable lithium-ion batteries. LiMn2O4 thin films have been widely considered as good candidates for their use as environmental gas sensors for detecting pollutant gases like carbon monoxide, carbon dioxide, hydrocarbons, ammonia and nitrogen oxides. The device performance is related to the structural prop

Thermodynamic Properties of MoO3 Thin Films

M.C. Rao

  • Abstract

    Transition metal oxides with diverse structures, properties and phenomena have been the focus of much attention in recent years in view of their scientific and technological applications. MoO3 finds application as a cathode material in the development of high-energy density solid-state microbatteries. It is considered as a promising chromogenic/electrochromic material, as it exhibits electro, photo and gaso chromic effects by virtue of which the material is of much interest for the development of electrochromic display devices, optical switching coatings, display devices and smart window technology. Many methods of preparation, physical and chemical methods, are used to prepare MoO3thin films: chemical vapor deposition, magnetron sputtering, solgel technology, thermal evaporation technique and flash evaporation. Hence in the present study, thin films of MoO3 were prepared

An Evaluation of Critical Frequency of Vortex as a Function of

Bishwa Mohan Kumar, Sobha Rani, K. P. Sinha and Lalit Kumar Mishra

  • Abstract

    Using the theoretical formalism developed by E. Ludhetal. (Phys. Rev A (1998)), we have presented a method of evaluation of critical frequent Ωcof vortex whose circulation number к=1confined in a spherical trap with N atoms of 87Rb. Ourtheoretically evaluated results indicate that Ωc decreases with N and decrease is more pronounced as one goes to higher N. Our theoretical results are consistent with those of the others theoretical workers.

Vacuum Evaporated WO3 Thin Films: Thermodynamic Properties

M.C. Rao

  • Abstract

    WO3 is one of the most interesting materials exhibiting a wide variety of novel properties particularly in thin film form useful for advanced technological applications. It exhibits structural transformations and sub-stoichiometric phase transitions, which attracted the attention of researchers over the past few years to explore their potential scientific and technological applications in the fields of display systems and microelectronics. Many methods of preparation, physical and chemical methods, are used to prepare WO3thin films: chemical vapor deposition, magnetron sputtering, sol-gel technology, thermal evaporation technique and flash evaporation. Hence in the present study, thin films of WO3 were prepared by thermal evaporation and the structure, thermo emf of the prepared samples was studied. The diffraction pattern of WO3thin films deposited at room temperature ind

Pulsatil flow of non-Newtonian blood through an Idealized Stenosis

Srinivas K and V.P.Rathod

  • Abstract

    The pulsatile non-Newtonian flow confined within a two-dimensional (2D) ax symmetric pipe with an idealized stenosis using the finite volume method. The effect of non-Newtonian nature of blood on yield plane locations, velocity, pressure distribution, wall shear stress of the artery is discussed. The governing Navier-Stokes equations have been modified using the Cartesian curvilinear coordinates. The flow is characterized by the Reynolds number at 300 which are appropriate for the large arteries. A scheme to compare the non-Newtonian and Newtonian flow effects is proposed.

A Theoretical Evaluation of Magnetic Field Dependence of Vortex

Bishwa Mohan Kumar, Sobha Rani, K. P. Sinha and L.K. Mishra

  • Abstract

    In this paper, we have theoretically determined the vortex core size by taking Ginzburg-Landau parameter k =1 for superconductor V3Si, NbSe2 and LuNi2B2C. We have used Eilenberger equations in our calculation. We have shown that vortex core size r0 and coherence length ab x exhibit magnetic field dependence. The maximum value of the cut off parameter x ab measured by m SR corresponds to the GL coherence length calculated from HC2. At low fields, where the vortices are weakly interacting, the fitted value of ab x agrees with expected from HC2.

Effect of BaTiO3 Doping in Electrical Properties of Barium Iron

Avinash Kumara, Pritam Kumarb, Asim Kumara, and N. K. Singha

  • Abstract

    Complex perovskite oxides are widely used in various solid -state devices e.g., optical devices, multilayer capacitors, transducers, actuators, sensors etc. High dielectric constant materials such as barium iron niobate nowadays become more and more important in ceramics materials. However, Pb-based compound are somewhat toxic and therefore, as a substitution for more environment friendly materials in application, attention is being increasing focused on the preparation of Pb-free high–performance piezoelectric materials. Lead free perovskite based oxides of 0.81Ba (Fe0.5Nb0.5) O3- 0.19BaTiO3, (BFN-BT19) was synthesized by the solid-state reaction method. Studies of structural and microstructural characterizations were performed by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. X-ray studies reveal that the material has monoclinic structure at room t

Non-shearing in Bianchi Type III String Cosmological Models wit

Preeti Soni and Dr. Sapna Shrimali

  • Abstract

    In This Paper, we have examined non-shearing locally rotationally symmetric Bianchi Type - III String cosmological models in the presence of bulk viscosity. To obtain a determine model we assume that the coefficient of the viscosity is proportional to the expansion scalar  . The physical and geometrical behaviors of the models are also discussed.

An Evaluation of Normal Electron - Electron Scattering  N

Ajay Kumar Singh

  • Abstract

    In this paper, we have evaluated Electron-Electron Scattering  N  ee Z A and  N  ee skin A for metals as a function of temperature T. These parameters were evaluated from data of anomalous surface impedance Z. Our theoretically evaluated results are in good agreement with those of the other theoretical workers.

Non-shearing in Bianchi Type III String Cosmological Models wit

Sapna Shrimali, Preeti Soni and Varun Humad

  • Abstract

    In This Paper, we have investigated non-shearing locally rotationally symmetric Bianchi Type - III String cosmological models in the presence of bulk viscous fluid. To get the determinate model of the universe, we have assumed that the coefficient of bulk viscosity ξ is inversely proportional to the expansion θ in the model. The physical and geometrical features of the models are also discussed.

A Theoretical Evaluation of Total Self Energy for a Static Char

Mundrika Mistry and L. K. Mishra

  • Abstract

    The total self-energy for a static charge of mass m= 1 near an insulatorvacuum surface has been evaluated .The contribution to the total self-energy comes from exciton and optical phonon excitations. We have shown that the contribution to the exciton field for a distance close to the surface dominates over the optical phonons. Our theoretically evaluated results are of good agreement with the other theoretical workers.

An Evaluation of Frequency and Temperature Dependent Effective

Md Shabbir Ahmad, Afaque Anzer and L. K. Mishra

  • Abstract

    Microwave properties of a bilayer structure made of high temperature superconductor (YBCO) and ferromagnetic material LSMO have been evaluated using theoretical formalism of T. Nurgaliev, O. G. Vendik and C-J Wu & Y. J. chen. WE have evaluated the frequency and temperature dependent effective surface resistance Rs,eff varying the film thickness of YBCO and keeping LSMO thickness fixed and vice versa. Our theoretical results indicate that the thickness of YBCO is more important than LSMO layer.

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