Rajiv Gandhi Institute of Technology, named after the late Prime Minister Sri. Rajiv Gandhi, run by the Government of Kerala, started functioning in 1991. Government started this institution with a view of making it a center for post graduation and research studies. The college is affiliated to the Mahatma Gandhi University Kottayam, Kerala. Wikipedia.
Perween S.,Rajiv Gandhi Institute of Technology |
Ranjan A.,Rajiv Gandhi Institute of Technology
Solar Energy Materials and Solar Cells | Year: 2017
In this work, we report a facile and novel approach to produce zinc titanate (ZnTiO3) powders of nanoporous nanoparticulate matter which show an improved photocatalytic activity under visible light illumination. The method consists of calcining the electrospun fibrous mats obtained by electrospinning a sol with a solution of guiding polymer that yields a white crystalline nanopowder. The powder's crystallinity was characterized by XRD which confirmed ZnTiO3 with a hexagonal structure. We have examined the photocatalytic activity of these powders by studying the photocatalytic degradation reaction of phenol in the presence of visible light from an incandescent light bulb. A comparison of the photocatalytic activity of our material with that of the powders prepared by other standard routes such as the bulk sol-gel method and the sol-gel method in presence of surfactant (CTAB) shows that the nanopowders obtained by calcining the electrospun-sols afford a much better photocatalytic activity in presence of the visible light. Surface area analysis of these nanopowders suggest an enhanced surface area per unit volume and that the nanoparticles are nanoporous. The enhanced visible-light photocatalytic activity is believed to be originating chiefly from the enhanced surface area as confirmed by the BET analysis, and larger carrier lifetimes as confirmed by the photoluminescence spectra. The reaction kinetics studied by monitoring the UV–Visible absorption spectra of phenol shows a first order decay kinetics in each case with the powder samples of calcined electrospun-sols giving the highest rate constant. © 2017 Elsevier B.V.
Sharma A.,Rajiv Gandhi Institute of Technology |
Srivastava J.,Rajiv Gandhi Institute of Technology |
Kar S.K.,Rajiv Gandhi Institute of Technology |
Kumar A.,Maulana Azad National Institute of Technology
Renewable and Sustainable Energy Reviews | Year: 2012
Renewable energy represents an area of tremendous opportunity for India. Energy is considered a prime agent in the generation of wealth and a significant factor in economic development. Energy is also essential for improving the quality of life. Development of conventional forms of energy for meeting the growing energy needs of society at a reasonable cost is the responsibility of the Government. Limited fossil resources and associated environmental problems have emphasized the need for new sustainable energy supply options. India depends heavily on coal and oil for meeting its energy demand which contributes to smog, acid rain and greenhouse gases' emission. Last 25 years has been a period of intense activities related to research, development, production and distribution of energy in India. Though major energy sources for electrical power are coal and natural gas, development and promotion of non-conventional sources of energy such as solar, wind and bio-energy, are also getting sustained attention. The use of electricity has grown since it can be used in variety of applications as well as it can be easily transmitted, the uses of renewable energy like wind and solar is rising. Wind energy is a clean, eco-friendly, renewable resource and is nonpolluting. The gross wind power potential is estimated at around 48,561 MW in the country; a capacity of 14,989.89 MW up to 31st August 2011 has so far been added through wind, which places India in the fifth position globally. This paper discusses the ways in which India has already supported the growth of renewable energy technologies i.e. wind energy and its potential to expand their contribution to world growth in a way that is consistent with world's developmental and environmental goals. The paper presents current status, major achievements and future aspects of wind energy in India. © 2011 Elsevier Ltd. All rights reserved.
Kale R.V.,Rajiv Gandhi Institute of Technology |
Pohekar S.D.,Tolani Maritime Institute
Renewable and Sustainable Energy Reviews | Year: 2012
The growth potential of any state is linked with infrastructure and electricity infrastructure is the most important parameter for economic growth. Maharashtra, a prominent state in India consumes 12 per cent of India's electricity. Maharashtra's power sector is facing the electricity deficit and shortage since early 2005. On the other hand, industrial and service sectors are rising in the state. The present paper discusses electricity situational analysis of the state. Electricity demand analysis has been presented and comparison of state electricity demand vis-à-vis Mumbai's demand (state capital) has been carried out for two years. Variation for monthly average demand for two years and load shedding have also been analyzed. Power supply situation analysis and analysis of major power suppliers have been carried out. The State Load Distribution Center data is used to depict the load variation for a typical day. Interventions needed to sustainably meet the growing demands are also discussed. © 2012 Elsevier Ltd. All right reserved.
Shukla A.,Rajiv Gandhi Institute of Technology |
Aberg S.,Lund University
Physical Review C - Nuclear Physics | Year: 2014
Nuclei with a central region of low nucleonic density, "bubble" nuclei, are studied. In particular, the possibility of bubbles in deformed nuclei is discussed, concentrating on experimentally accessible light nuclei. Utilizing the relativistic mean field (RMF) model we find favorable candidates in the prolately deformed 24Ne nucleus and the mirror nuclei 32Si and 32Ar with oblate shapes. © 2014 American Physical Society.
Jha N.,Rajiv Gandhi Institute of Technology
Proceedings of 2010 International Conference on Methods and Models in Computer Science, ICM2CS-2010 | Year: 2010
The aim of this paper is to describe the formulation of quarter sweep alternating group explicit (QSAGE) iterative method using six order accurate finite difference approaches for solving nonlinear singular two point boundary value problems. The proposed QSAGE method shows the superiority over corresponding full sweep AGE and SOR method. The proposed method is applicable to problems both in Cartesian and polar coordinate and suitable for use on parallel computers. Computational results are provided to illustrate the proposed method. © 2010 IEEE.
Rajpoot M.K.,Rajiv Gandhi Institute of Technology
Computers and Fluids | Year: 2016
The present paper deals with the dispersion relation preserving (DRP) analysis of the Robert-Asselin type filters coupled with leapfrog time integration method for time dependent non-dispersive and dispersive model systems. As, leapfrog time advancement method is widely used in the numerical modeling of atmosphere and ocean dynamics, despite the fact that in addition to physical mode it also admits a spurious mode. This is the major disadvantage of leapfrog time integration scheme in discrete computing. To suppress the spurious mode associated with leapfrog time integration method, Robert-Asselin type filters are extensively used in the literature. Here, the dispersion analysis is based on the spectral analysis by considering filtered/unfiltered leapfrog time integration method along with spatial discretization schemes. Spatial discretization is performed using second order centered difference and optimized compact schemes. Furthermore, to assess the efficacy of these methods one dimensional convection equation is used as a model equation for the non-dispersive case, while linearized rotating shallow water equations (LRSWE), as a model test problem for the dispersive case. © 2016 Elsevier Ltd.
Sharma A.,Rajiv Gandhi Institute of Technology
Renewable and Sustainable Energy Reviews | Year: 2011
Energy is considered a prime agent in the generation of wealth and a significant factor in economic development. Energy is also essential for improving the quality of life. Development of conventional forms of energy for meeting the growing energy needs of society at a reasonable cost is the responsibility of the Government. Limited fossil resources and environmental problems associated with them have emphasized the need for new sustainable energy supply options that use renewable energies. Development and promotion of non-conventional/alternate/new and renewable sources of energy such as solar, wind and bio-energy, etc., are also getting sustained attention. Alternative energy news source has long asserted that there are fortunes to be made from smart investments in renewable energy. Solar power is one of the hottest areas in energy investment right now, but there is much debate about the future of solar technology and solar energy markets. This report examines various ways in which solar power is precisely such an opportunity. © 2010 Elsevier Ltd. All rights reserved.
Hemanth J.,Rajiv Gandhi Institute of Technology
Composites Part B: Engineering | Year: 2011
This paper describes the fabrication and testing of aluminum alloy MMCs reinforced with fused silica particles cast in sand moulds containing metallic and nonmetallic chills. Fused silica particles of size 50-100 μm were dispersed (3-12 wt.%) into the matrix. The resulting composites cast were tested for their microstructure, strength, hardness, and wear behavior. Microstructural studies indicate good bonding along with uniform distribution of the dispersoid. Strength, hardness and wear resistance increase up to 9 wt.% additions of dispersoid and copper chill was found to be the best because of its high volumetric heat capacity. © 2011 Elsevier Ltd. All rights reserved.
Mandal I.,Rajiv Gandhi Institute of Technology
Knowledge-Based Systems | Year: 2014
This research work adduces new hybrid machine learning ensembles for improving the performance of a computer aided diagnosis system integrated with multimethod assessment process and statistical process control, used for the spine diagnosis based on noninvasive panoramic radiographs. Novel methods are proposed for enhanced accurate classification. All the computations are performed considering steep error tolerance rate with statistical significance level of 5% as well as 1% and established the results with corrected t-tests. The kernel density estimator has been implemented to distinguish the affected patients against healthy ones. A new ensemble consisting of Bayesian network optimized by Tabu search algorithm as a classifier and Haar wavelets as the projection filter is used for relevant feature selection and attribute's ranking. The performance analysis of each method along with major findings is discussed using various evaluation metrics and concludes with propitious results. The results are compared to the existing SINPATCO platform that uses MLP, GRNN, and SVM. The optimization of machine learning algorithms is obtained using Design of Experiments scheme to achieve superior prediction accuracy. The highest classification accuracy obtained is 96.55% with sensitivity, specificity of 0.966 and 0.987 respectively. The objective is to enhance the software reliability and quality of spine disorder diagnosis using medical diagnostic system and reinforce the viability of precise treatment. © 2014 Elsevier B.V. All rights reserved.
Sharma A.,Rajiv Gandhi Institute of Technology |
Shukla A.,Rajiv Gandhi Institute of Technology
Energy and Buildings | Year: 2015
This paper deals with the thermal cycle tests of the binary mixtures based on fatty acids, i.e. capric acid (CA), lauric acid (LA), myristic acid (MA), palmitic acid (PA) and stearic acid (SA). Overall, 13 binary mixtures, i.e. CA-LA (40/60 wt.%, 50/50 wt.%, 60/40 wt.%, 70/30 wt.% and 80/20 wt.%), CA-MA (70/30 wt.%, 80/20 wt.% and 90/10 wt.%), CA-PA (70/30 wt.%, 80/20 wt.% and 90/10 wt.%) and CA-SA (60/40 wt.% and 90/10 wt.%) were developed as latent heat energy storage materials for the building applications. The Differential Scanning Calorimetry (DSC) technique was applied to the binary mixtures after 0, 50, 100, 150, 200, 250, 300, 600, 900, 1200 melt/freeze cycles to measure the melting temperatures and the latent heats of fusion. The DSC results showed that the changes in melting temperature were in between -1.69°C to 4.33°C, and the changes in the latent heat fusion was -35% to +25%. These results show that the melting temperatures and latent heat values of the PCMs are in the range of about 21-30°C and 100-170 J/g which showed that these materials have good thermal stability up to 1200 thermal cycles and can be potentially applied for building applications. © 2015 Elsevier B.V. All rights reserved.