Vol. 3 & Issue 1 ; Section C : Physical Sciences

Date : Nov.2012 to Jan.2013

 

Comparison of Numerical Efficiencies of Gaussian Elimination an

R. B. Srivastava and Vinod Kumar

  • Abstract

    Inverses of matrices have been found out using Gaussian and Gauss-Jordan elimination methods with the help of developed computer program. Numbers of operations involved in the determination of inverses of matrices have also been computed. Numerical efficiencies of Gaussian and Gauss-Jordan elimination methods have been found to be 2.547511 and 2.392344 which indicates that the Gaussian elimination method is approximately 1.051 times faster than the Gauss-Jordan elimination method

Comparison of Numerical Efficiencies of Gaussian Elimination an

R. B. Srivastava and Vinod Kumar

  • Abstract

    Twenty linear simultaneous equations have been solved with the help o Gaussian elimination and Gauss-Jordan elimination methods using computer program developed in C++ programming language. Numbers of operations involved in the solutions of in the solution of linear simultaneous equations have also been calculated. The efficiencies of Gaussian and Gauss-Jordan elimination methods have been found to be 14.072614 and 9.292816 respectively which indicates that Gaussian elimination method is approximately 1.514354 times faster than Gauss-Jordan elimination method.

Development of Glass Dispersed Electrolyte and Electrode for Solid State SO2 Gas Sensor

Ajay Lad

  • Abstract

    Electrochemical SO2 gas sensor fabricated using Ag+-glass dispersed Ag2SO4as an electrolyte. A sensor was prepared by depositing a thin layer of ferroelectric dispersed composite as an auxiliary phase. Modified the working electrode improves the sensor response due to presence of large number triple point (gas, Pt, electrolyte interface). The sensor was found responding to various test gas concentrations, showing Nernstian behavior (two-electron reaction) in limited range of gas partial pressure.

Narrow-Band 1D Photonic Crystal Based Omni-Directional Mirror a

Sanjeev Sharma, Rajendra Kumar, Kh.S. Singh, Vipin Kumar and M.P.Srinivasa Rao

  • Abstract

    Omni-directional reflection (ODR) property of one-dimensional photonic crystal (PC) structures consisting of alternate layers of Germanium (Ge), and zinc sulfide (ZnS) has been investigated. The existence of total Omnidirectional reflection band gap in 1D-PC is predicted theoretically. Reflectivity of one dimensional periodic structure for TE and TM-modes at deferent angles of incidence has been calculated by using Transfer Matrix Method (TMM). It is found that the mirror designed with these materials has a ODR range which covers the window of 1550 nm used in optical communications

Study on acoustical paramèters in binary liquid mixture 

Sreedevi , Srinivasu , Fakruddin and Narendra 

  • Abstract

    Density (r),Ultrasonic velocity (u), and viscosity (h) values have bee measured in the binary liquid mixtures containing aniline and anisoleat different temperatures over the entire range of composition This data have been used to adiabatic compressibility (b), free length (Lf), free volume (Vf) and internal pressure (p). The results obtained here are used to explain the molecular interaction between the components of the mixture.

Propagation of Rayleigh Waves in a Non-Homogeneous Granular Media

Rajneesh Kakar and Shikha Kakar

  • Abstract

    The present paper describes the influence of non-homogeneity of the material medium on the propagation of surface waves in a granular half-space overlain by a different granular layer. The wave velocity equation has been obtained in the form of ninth order determinantal expression and is in well agreement with the corresponding classical result, when non-homogeneity is absent

Synthesis and Study of Substitution Effect of Halogen on Photophysical Properties of Anils

Bapu R Thorat, Priyanka Patel, Ramesh S Yamgar and Ramdas G Atram

  • Abstract

    Salicylaldehyde (1) and 5-bromosalicyladehyde (2) was condensed with series of haloanilines (3a-e) forming Schiff bases (anils, 4a-e, 5a-e) which are characterised by FT-IR and NMR spectroscopy. The absorption and emission spectra of final Schiff bases (4a-e, 5a-e) was recorded. The Schiff base shows maximum absorption at 400 nm and 800 nm. The emission spectra of 4a-e and 5a-e were recorded at 400 nm (as excitation wavelength). The halogen substitution on anils shows blue shift in emission

Physicochemical Properties of Soybean Oil and Their Blends with

Kailas M. Talkit, D.T.Mahajan, V.H.Masand

  • Abstract

    In these study vegetable oils like soybean oil, sesame oil, sunflower oil, coconut oil was purchased from local super market. The physicochemical properties like viscosity, acid value, saponification value, iodine value of four different vegetable oils and there blends in 10:90 to 90:10 proportion were studied. From this study, it was found that viscosity of soybean coconut oil blend in proportion 90:10, soybean oil sesame oil blend in proportion 10:90 and soybean oil sesame oil blend in proportion 20:80 was found to be higher than other blends. Also acid value of same blends lower than other blends; hence from this study it’s conclude that, the above blends are use as a alternative to petroleum based lubricants in industries.

Thermoelastic Surface Waves Propagation in Non-Homogeneous Viscoelas

Rajneesh Kakar and Shikha Kakar

  • Abstract

    The propagation of surface waves in a non-homogeneous, isotropic, thermo-viscoelastic medium of higher order including time rate of strain has been discussed in this study. The problem has been solved analytically using linear inhomogeneity and the exact solution of velocity equations has been obtained for Stoneley, Rayleigh and Love type surface wave. In fact, these equations are in agreement with the corresponding classical results when the medium is free from viscosity, temperature and inhomogeneity.

Effect of Thickness on Structural, Optical and Electrical Prope

M. A. Barote, A. A. Yadav and E. U. Masumdar

  • Abstract

    Thin films of Cd0.825Pb0.175S with different thicknesses have been deposited onto amorphous glass substrates using simple and low-cost chemical bath deposition technique. X-ray diffraction (XRD) analysis of the as-deposited films shows polycrystalline nature. Energy dispersive analysis by X-ray (EDAX) confirms the deposited films are well adherent and grains are uniformly distributed over the surface of the substrate. The studies on optical properties show that the direct band gap value decreases from 2.13 eV to 1.72 eV as thickness varied from 1.22 μm to 2.75 μm The electrical conductivity and thermoelectric power (TEP) measurements have been carried out in 300-500 K temperature range. The activation energy is found to be thickness dependent and it varies in the range of 0.127-0.168 eV at low temperature range and 0.421-0.514 eV at higher temperature. Semiconductor behavior has bee

Optical Identification of Polyaniline Doped with Mn and Fe

Pushpendra Singh, Kapil Sirohi, Jitendra Singh, Pradeep Kumar and Sachin Gill

  • Abstract

    Polyaniline is one of the oldest of conducting polymers and amongst the various conducting polymers Pani has rapidly become the subject of considerable interes for physicists, chemists and material scientist. In this paper, we have carried out the optical properties of polyaniline doped with Fe and Mn at 30% and 50percentage Concentration. The reflection spectra of Polyaniline doped with Fe and Mn was measured at room temperature in the wavelength range of 300-800nm.

Effect of solution molarity on the structural and opto-electric

E. U. Masumdar and M. A. Barote

  • Abstract

    The present work deals with the preparation of zinc oxide thin films (ZnO) by the spray pyrolysis method. The starting solution was zinc acetate. Effect of solution molarity on film properties was investigated. All films deposited were characterized by various techniques such as X-ray diffraction for structural characterizations, weight difference density method for thickness measurement, UV–VIS transmission spectrophotometer for optical properties and the two probe conductivity measurements for electrical characterization. The X- ray diffraction (XRD) patterns showed that the films deposited are polycrystalline with preferential orientation along (002) plane. The optical study showed that films are highly transparent in the visible region with an average transmission of about ~85%. The optical band gap decreased from 3.25 eV to 3.02 eV, on increase in molar concentration from 0.1 M to 0.75 M.

Study of Azoxy-Based Liquid Crystals (p-azoxyanisole, p-azoxyph

Rajendra Prasad Tewari, Gayasuddin Khan*, Alok Shukla and K. D. P. Shukla

  • Abstract

    Computational study of electronic structure of some of azoxybenzene-based liquid crystals belonging to nematic class: p-azoxyanisole, p-azoxyphenetole, ethyl-pazoxybenzoate, ethyl-p-azoxycinnamate and n-octyl-p-azoxycinnamate have been studied. In order to obtain more information on the reactivity of above molecules towards nucleophile and electrophile, we performed semiempirical(AM1, PM3 and PM5) and density functional theory (DFT) based calculation to evaluate the negative and positive charge distribution in all the cases.p-azoxyanisole is treated as reference compound (RC) then the study shows that replacement of -OCH3 group of RC by - OC2H5 group decreases the ρHOMO, while successive addition of –COOC2H5, – CH=CH-COOC2H5 and –CH=CH-COOC8H17 groups increase the ρHOMO, respectively.&nb

Propagation of Rayleigh Waves in Non-Homogeneous Orthotropic Elastic

Rajneesh Kakar , Shikha Kakar

  • Abstract

    The influence of the gravity, rotation and magnetic field on the propagation of Rayleigh waves in a prestressed inhomogeneous, orthotropic elastic solid medium has been discussed. The method of separation of variable is used to find the frequency equations of the surface waves. The obtained dispersion equations are in agreement with the classical results when gravity, rotation, magnetic field, non-homogeneity and initial stress are neglected. The effect of various inhomogeneities on Rayleigh waves have also been represented graphically

Effects of Various Inhomogeneities on Torsional Surface Waves Propag

Rajneesh Kakar, Shikha Kakar, Kanwaljeet Kaur and Kishan Chand Gupta

  • Abstract

    The possibilities of propagation of torsional surface waves in a non-homogeneous isotropic crustal layer lying over a viscoelastic mantle have been studied. Rigidity and density of the viscoelastic medium are inhomogeneous and assumed to vary exponentially with depth. The method of separation of variables has been used to find the dispersion equation for the torsional surface waves. The effects of various non-homogeneities on the phase velocity of torsional surface waves have shown graphically.

Studies on Correlation of Electrical Properties of Red Soils wi

Avinash. A. Patil and D.V.Ahire

  • Abstract

    A study of the micronutrient status of red soils of North Maharashtra and Konkan areas was made at six different locations. The objective of the experiment was to study the status of macro and micronutrients and their correlation with various physiochemical properties. Soil samples were collected at a depth of 0-20cm and analyzed for electrical conductivity, pH, Iron, Copper, Zinc, Manganese. The dielectric constant of these samples is also measured at X-band microwave frequency (10.5GHz) using waveguide cell method at TE10 mode. The textural analysis as %sand, %silt and %clay of six red soil samples and their correlation with dielectric constant and electrical conductivity are also reported. The textures of these samples are sandy loam, sandy clay loam, loam and sandy. The values of pH indicated that some of the soils are alkaline and some are acidic in nature. The soil analysis indicated that some of th

Study of Dielectric Constant and Dielectric Loss of some Igneou

P. R. Chaudhari and D. V. Ahire

  • Abstract

    Microwave remote sensing of rock requires the study of dielectric parameters like dielectric constant and dielectric loss of rocks. In this paper dielectric constant of five igneous rock samples Rhyolite, Granite, Tholeiite Basalt, Dolerite Dyke, Basalt Ferro have been measured at three microwave frequencies 9.32 GHz, 9.72 GHz and 10.25 GHz of Xband by using waveguide cell method, under ambient atmospheric conditions. Dielectric loss was then calculated from dielectric constant for all rock samples. The result shows that the dielectric constant of igneous rocks under ambient atmospheric conditions decreases with increase in frequency. Loss factor for basic rock samples are greater than that for acidic rock samples at a fixed frequency.

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