Am Jain College

Chennai, India

Am Jain College

Chennai, India
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Kannan B.,Am Jain College | Seshadri P.R.,Am Jain College | Murugakoothan P.,Pachaiyappas College | Ilangovan K.,RKM Vivekananda College
Asian Journal of Chemistry | Year: 2013

The cerium doped sulphamic acid was grown by slow evaporation solution growth technique. The unit cell parameters of the grown crystal was confirmed by single crystal X-ray diffraction. The functional group of the grown crystal was found by FT-IR study. Thermal and UV-visible absorption studies were performed to know the thermal and optical behaviours of the grown crystal respectively. © 2013 Asian Journal of Chemistry.

Hema R.,Am Jain College | Parthipan K.,Am Jain College | Ramachitra S.,Pondicherry University | Balaji S.,SCSVMV University
Bulletin of the Korean Chemical Society | Year: 2013

Single crystal EPR and optical studies of a mixed ligand zinc(II) complex doped with VO(II) ion is carried out to establish the structural properties. The angular variation of vanadyl hyperfine lines indicates a single site, with spin Hamiltonian parameters as: gxx = 1.985, gyy = 1.979, gzz = 1.943; Axx = 8.71, Ayy = 6.41 and A zz = 17.80 mT. By comparing the direction cosines of principal g and A values with the direction cosines of metalligand bonds, it has been confirmed that the vanadyl ion has entered the lattice interstitially. The exact interstitial position of VO(II) in host lattice has been calculated using the fractional coordinates of atoms in the host lattice out of many assumptions. The EPR and optical data have been confirmed to obtain various bonding parameters, from which the nature of the bonding in the complex is discussed. FT-IR confirms the formation of structure of host lattice.

Ganesh T.,Loyola Institute of Frontier Energy LIFE | Ganesh T.,Presidency College at Chennai | Rajesh S.,Loyola Institute of Frontier Energy LIFE | Rajesh S.,Am Jain College | And 2 more authors.
Journal of Nano Research | Year: 2013

Pure and Aluminium-doped ZnO (Zn1-xAlxO) x = 0 to 5 wt% thin films were deposited onto glass substrate by sol-gel spin coating method. The influence of various aluminium concentration in ZnO thin films on the structural, surface, optical and photoconducting properties were investigated. The GIXRD studies confirmed the polycrystalline nature with wurtzite structure of pure and Al doped ZnO films. Films with 1.5 % concentration of aluminium showed maximum absorption and transmission in the UV and visible regions respectively. The FESEM images showed crack free films with increasing grain boundaries upon doping. The average grain size is found to decrease due to aluminium doping. AFM images showed doped films with 1.5 % have better smoothness than other films. The photoconductivity measurements reveal that there is increase in the photocurrent compared to dark current for the Al doped ZnO. The photocurrent reaches its maximum value for ZnO: Al-1.5 % and then decreases upon increase in Al concentration. The photoresponse has slightly degraded upon aluminium doping onto ZnO. Temperature dependent conductivity shows that the thermal activation energy for the film decreases up to 1.5 % aluminium concentration and then increases for other concentrations in the temperature range 308 to 375K. © (2013) Trans Tech Publications, Switzerland.

Dhaiveegan P.,Anna University | Elangovan N.,Am Jain College | Nishimura T.,Japan National Institute of Materials Science | Rajendran N.,Anna University
Electroanalysis | Year: 2014

The electrochemistry of the corrosion products formed from carbon and weathering steel during four years of atmospheric exposure were investigated using a carbon paste electrode (CPE) by cyclic and square wave voltammetry. The iron rust products with crystalline nature were identified from their standard formal potential. The corrosion protection ability of the rust layers were determined by polarization and electrochemical impedance spectroscopy studies using CPE. ATR-FTIR, SEM and XRD studies were employed to identify the composition and morphology of the corrosion products which supports SWV results. Results showed that the weathering steel has higher corrosion resistance than the carbon steel. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Aruna S.,Am Jain College | Nandakishore L.V.,M.R.Research
Advances in Intelligent Systems and Computing | Year: 2015

Cardiac arrhythmias are electrical malfunctions in rhythmic beating of the heart. Sometimes, they cause life-threatening conditions. Hence, they need to be diagnosed quickly and accurately to save life and prevent further complications and effective management of the disease. In this paper, we propose an ensemble neural network algorithm to detect arrhythmia. Bagging approach with multilayer perceptron and radial basis neural networks is used to classify the standard 12-lead Electrocardiogram (ECG) recordings in the cardiac arrhythmia database available in UCI Machine Learning Repository. The classification performance of the diagnostic model was analyzed using the following performance metrics, namely precision, recall, F-measure, accuracy, mean absolute error, root mean square error, and area under the receiver-operating curve. The classifier accuracy obtained for the ensemble neural network (ENN) model is 93.9 and 94.9% for ENN-RBFN and ENN-MLP, respectively. © Springer India 2015.

In this paper, we use the matrix geometric approach to analyze the behaviour of an Interactive Voice Response System (IVRS). We model the system as an M/M/1 retrial queue with two phases of service (the second service is multi optional), Bernoulli feedback, impatient customers and the possibility of server breakdown and repair. We study the stability of the system by employing the Neuts and Rao (Queueing Syst. 7, 169-190 (1990)) truncation method and then we study the level dependent QBD (Quasi-Birth Death) model obtained by the above truncation method to obtain expressions for the performance measures of the system. Numerical illustrations are provided to study the sensitivity of the performance measures of the system to the changes in various parameters of the system. © 2013 Operational Research Society of India.

Ganesh T.,Presidency College at Chennai | Rajesh S.,Am Jain College | Xavier F.P.,Loyola-ICAM College of Engineering and Technology
International Journal of ChemTech Research | Year: 2014

Thin films of pure zinc oxide (ZnO) and Aluminium doped ZnO (AZO) prepared by sol-gel assisted spin coating technique on glass substrates were characterized by fluorescence spectroscopy and its photo conductivity property was studied. The Texture Coefficient (TC) and crystallite size were calculated from the XRD. The photoluminescence (PL) spectra showed UV and defect related visible emissions. A model has been proposed to show the defect states existing between valence band (VB) and conduction band (CB) based from the observed PL spectra. The photoconductivity and photo response studies show the enhanced conductivity and increased rise and decay times due to Al doping onto ZnO. The defect states and trap depth determined were analysed and the results are discussed.

Ganesh T.,Loyola Institute of Frontier Energy LIFE | Ganesh T.,Presidency College at Chennai | Rajesh S.,Loyola Institute of Frontier Energy LIFE | Rajesh S.,Am Jain College | And 2 more authors.
Materials Science in Semiconductor Processing | Year: 2013

Thin films of undoped and doped ZnO, with different Al concentrations (1-5 wt%) were deposited onto glass substrates, by the sol-gel spin coating method. Grazing incidence X-ray diffraction (GIXRD) studies confirmed the nature of films as poly-crystalline, with typical hexagonal wurtzite structure. The films showed variation in crystallite size and change in relative intensities, upon different Al doping concentrations. The surface morphology of the films examined using FE-SEM, showed the grain size becoming smaller upon Al doping. The influence of Al with different concentrations, onto ZnO on the optical absorption and transmittance was studied using UV-Vis-NIR spectrophotometer in the wavelength range 300-2500 nm. The UV absorption shifted towards shorter wavelength upon Al doping. The average transmittance in the visible region increased for Al doped films up to 1-2 wt% and decreased for other concentration. The dark and photo conductivity measurements of the films indicated increase in the current values upon doping up to 1-2 wt% of Al and decreased for further concentrations. The rise and decay time measured from the photoresponse study, indicate larger values of rise time for the doped films compared to undoped ZnO. However, the film with 1-2 wt% doping of Al showed better response within the doping concentration. The thermal activation energy obtained from temperature-dependant conductivity showed decrease in the value upon Al doping up to 2 wt% and increased beyond this concentration in the temperature range 300-400 K. © 2012 Elsevier Ltd.

Ganesh T.,Presidency College at Chennai | Rajesh S.,Am Jain College | Mohan Kumar R.,Presidency College at Chennai
Advanced Science Letters | Year: 2016

Thin films of undoped ZnO and Al (1–5 wt%) doped ZnO prepared by sol–gel assisted spin coating method were characterized by diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and photo-response studies were carried out. From the DRS studies, optical band gap (Eg) was found to increase for the Al:ZnO films. The texture coefficient (TC) of 1–1.5 wt% Al:ZnO along (002) plane was found to be higher among the doped films. PL study indicated the UV as well as defect related visible emissions. From the PL spectra, the defect states present between valence band (VB) and conduction band (CB) showed the presence of deep trap corresponding to green band emission. The photo-response study shows that the doping of Al with ZnO increases the rise and decay times compared to undoped ZnO film. However, 1–2 wt% Al:ZnO films showed better response among the doped films. The trap depth values calculated from photo-response studies are comparable with the values obtained from PL results. © 2016 American Scientific Publishers. All rights reserved.

Latha G.M.,Am Jain College | Sripriya M.,Am Jain College | Ramesh N.,Am Jain College
Advanced Materials Research | Year: 2014

In this paper we present the basic theory of nonlinear photonic crystal fibers (PCFs) with a focus on theoretical aspects of generating squeezed light using Kerr effect. The FDTD method is employed to study the guided modes of em field propagation in PCF. The degree of squeezing is determined using correlations function corresponding to the fields of light. It is shown that noise in a squeezed light is reduced to about 24% below the minimum noise observed in coherent light. © (2014) Trans Tech Publications, Switzerland.

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