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Bhubaneshwar, India

Orissa Engineering College , Bhubaneswar, is the government engineering college to be established in Odisha. It was set up in 1986. Orissa Engineering College is the result of the vision of Shri Kamini Kanta Patnaik. The institute provides courses in B.Tech, M.Tech and MBA.The college is affiliated to Biju Patnaik University of Technology and has been approved by AICTE. The college has received NBA for three departments; Electronics and Telecommunication Engineering, Mechanical Engineering and Electrical Engineering. Wikipedia.

Tosh B.,Orissa Engineering College, Bhubaneswar
Indian Journal of Chemical Technology

High a-cellulose has been dissolved in two non-degrading solvent systems like dimethyl sulfoxide/paraformaldehyde (DMSO/PF) and N,N-dimethyl acetamide/lithium chloride (DMAc/LiCl) and then fractionated to different molecular weight fractions by regeneration technique. Esters of the different molecular weight fractions of cellulose have been prepared having substitution chain length of C 2-C 5 using pyridine as catalyst. The esters are characterized by IR and 1H-NMR spectroscopy. Thermal characterization of the esters is done by thermogravimetric and differential thermogravimetric analysis and the kinetic parameters of thermal degradation are measured by using Coats and Redfern equation. It is found that the temperature of active decomposition decreases with the increase in substitution chain length and also with the decrease in molecular weight of the fractions. The mechanism of thermal degradation has also been studied. Cellulose acetate prepared in DMSO/PF solvent system shows higher temperature of active decomposition (367.5°C) than that prepared in DMAc/LiCl solvent system (350°C). This is due to the formation of methylol cellulose ester in DMSO/PF solvent system. Source

Panda S.,Kalam Institute of Technology | Mohapatra P.K.,Orissa Engineering College, Bhubaneswar
Applied Soft Computing Journal

This paper deals with the problem of equalization of channels in a digital communication system. In the literature, arti.cial neural network (ANN) has been increasingly used for the said problem. However, traditional methods of ANN training fall short of desired performance in the problem of equalization. In this paper, we propose a recently proposed training method for ANN for the problem. This training uses directed search optimization (DSO) as a trainer to neural networks. Then, we apply the same to the problem of nonlinear channel equalization and in that way, this paper introduces a novel strategy for equalization of nonlinear channels. Proposed method of channel equalization performs better than contemporary equalization methods used in the literature, as evident from extensive simulation results presented in this paper. © 2014 Elsevier B.V. All rights reserved. Source

Panda N.R.,Indian Institute of Technology Bhubaneswar | Acharya B.S.,Orissa Engineering College, Bhubaneswar | Singh T.B.,Manipur University | Gartia R.K.,Manipur University
Journal of Luminescence

ZnO nanopowders doped with cerium ions (1.2 and 1.5 at. wt.%) were synthesized through soft solution route using ultrasound. Sonication has been found to be an effective way for doping rare earth ions like cerium into ZnO. This was confirmed from energy dispersive analysis of X-rays (EDAX) measurement. Further, optical absorption and photoluminescence (PL) measurements corroborate this finding. X-ray diffraction (XRD) studies show the increase of crystallite size and unit cell volume with doping of cerium ions. Formation of fibrous structure of ZnO:Ce was observed from the transmission electron microscopy (TEM) measurements. Although the structural measurements indicate Ce4+ ion occupying substitutional site in ZnO, PL and absorption studies confirmed the presence of Ce3+ ion in the powder. The coexistence of Ce 3+ and Ce4+ ions has been explained on the basis of conversion of Ce3+ to Ce4+ in the oxidizing environment. Thermoluminescence (TL) and photo-stimulated decay of luminescence (PSDL) decay studies give an idea of various trapping levels present in the band gap of ZnO. These traps release electrons during optical stimulation to give bimolecular kinetics in nano ZnO:Ce powders. © 2012 Elsevier Inc. All rights reserved. Source

Baliarsingh F.,Orissa Engineering College, Bhubaneswar
International Journal of Earth Sciences and Engineering

Efficient reservoir operation is necessary to tackle temporal and spatial unequal distribution of reservoir inflow. Reservoir inflow is uncertain by its nature, which can not be controlled. This uncertainty nature of inflow should be considered during reservoir operation. In the present work, Stochastic Dynamic Programming (SDP) model is developed and is applied to an existing reservoir (case study) to obtained optimal operating policy. The case study is made on the multipurpose reservoir at Hirakud of Orissa constructed across Mahanadi River. It is used for producing 307.5 MW of hydropower and irrigating 0.16 and 0.11 million hectares of land for Kharif and Rabi crop respectively. The objective during reservoir operation is to optimize the expected value of system performance. In this work, the system loss value is the summation of square of deficits from target release and target reservoir storage. The uncertainty of reservoir inflow is incorporated in the SDP model in the form of transition probability of inflow. The objective function of the model is the multiplication of system loss value and transition probability, which is to be minimized for optimal reservoir operation. The reservoir is operated on monthly basis in the present work. Considering the same pattern of inflow as last thirty-five years, in the steady-state condition the reservoir storage is found to achieve the target for seven months, may or may not achieve the target for three months; and will never achieve the target for two months. © 2010 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved. Source

Panda N.R.,Indian Institute of Technology Bhubaneswar | Sahu D.,CSIR - Institute of Minerals And Materials Technology | Acharya B.S.,Orissa Engineering College, Bhubaneswar
Journal of Nanoscience and Nanotechnology

Nanopowders of ZnO pure and doped with boron have been synthesized through sonochemical method using acetate of the material as starting reagent. The incorporation of boron has been confirmed by inductively coupled plasma-optical emission spectroscopy (ICP-OES) analysis. Continuous (CS) and pulsed (PS) mode syntheses have shown interesting structural and optical properties such as photoluminescence (PL) and ultra-violet (UV) absorption. X-ray diffraction (XRD) studies showed broadening and shifting of peaks with boron incorporation in ZnO leading to size reduction in doped samples. The structure of the nanoparticles was found to be rod like and these rod like structure coalesce in boron doped ZnO. This has been explained on the basis of nucleation of octahedral units in the beginning leading it to tetrahedral structure. Electron microscopy has been used to explain these results. Definite peak shifts towards low wavelength side in absorption band and photoluminescence spectra have been observed for smaller particle size in pulsed mode powder. The blue shift due to particle size has been explained in the light of quantum confinement effect. Copyright © 2012 American Scientific Publishers All rights reserved. Source

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