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Pilani, India

Birla Institute of Technology & Science is an Indian institute of higher education and a deemed university under Section 3 of the UGC Act. The university has 15 academic departments, and focuses primarily on undergraduate education in engineering and the science.The institute was established in its present form in 1964. During this period, the institute's transformation from a regional engineering college to a national university was backed by G.D. Birla. BITS has established centres at Goa,Pilani,Hyderabad and Dubai.BITS administers the all-India computerised competitive entrance examination, BITSAT , Admission is merit-based, as assessed by the BITSAT examination. The fully residential institute is privately supported. Wikipedia.

Maiti D.K.,Birla Institute of Technology and Science
Ocean Engineering | Year: 2012

Numerically simulated results are presented for a family of rectangular cylinders (placed parallel to a wall and subjected to a uniform shear flow) with aspect ratios r (=b/a with height a and width b) ranging from 0.1 to 1.0 (square cylinder) to gain a better insight into the dependency of the aerodynamic characteristics on the operational dimensionless parameters, namely aspect ratio r, gap height L and Reynolds number Re. The governing unsteady Navier-Stokes equations are solved numerically through SIMPLE algorithm with the QUICK scheme for convective terms. The critical Reynolds numbers at which an alternating vortex shedding commences from each of the rectangular cylinder are specified for different gap heights. A special attention is paid to search a rectangular cylinder of suitable thickness to produce the stronger vortices in the wake. The present numerical results are certified with some previous numerical and experimental findings. © 2012 Elsevier Ltd.

Gupta N.,Birla Institute of Technology and Science
Materials and Design | Year: 2011

This paper presents a material selection approach for selecting absorbent layer material for thin-film solar cells (TFSCs) using multiple attribute decision making (MADM) approach. In this paper, different possible materials for absorbent layer and their properties like band gap, absorption coefficient, diffusion length, thermodynamic compatibility and recombination velocity is taken into consideration and MADM approach is applied to select the best material for thin-film solar cells. It is observed that Copper Indium Gallium Diselinide (CIGS) is the best material for the absorbent layer in thin-film solar cells out of all possible candidates. It was observed that the proposed result is in accordance with the experimental findings thus justifying the validity of the proposed study. © 2010 Elsevier Ltd.

Tripathi D.,Birla Institute of Technology and Science
Computers and Mathematics with Applications | Year: 2011

This paper presents the effect of endoscope on peristaltic transport of fractional Maxwell fluids through the gap between two concentric uniform tubes under the assumptions of large wavelength and low Reynolds number. The inner tube is an endoscope and the outer tube has a sinusoidal wave traveling down its wall, i.e. the inner tube is rigid and outer tube is flexible. Solutions for the problem are obtained by two numerical methods named as homotopy perturbation method and variational iteration method. The impacts of endoscope, relaxation time and fractional parameters on pressure per wavelength and friction force (on inner and outer tubes) per wavelength are discussed with the help of computational results which are presented in graphical form. On the basis of the present study, it is revealed that pressure diminishes with increase in the magnitude of first fractional parameter, ratio of tube radii and relaxation time whereas it enhances with increasing the magnitude of second fractional parameter and amplitude ratio. The study further reveals the important fact that the effects of all pertinent parameters (except ratio of tube radii) on friction force at inner tube are similar in magnitude but opposite in direction to that of pressure and the effects of same parameters on friction force at outer tube are similar in magnitude but opposite in direction to that of pressure. © 2011 Elsevier Ltd. All rights reserved.

Cycloaddition/annulation reactions remain the most attractive methods for the synthesis of five membered heterocyclic ring systems. Among the three possible strategies for [3 + 2] cycloaddition, this review focuses on 1,3-carbon donor-acceptor (C3, D-A) cycloaddition/annulation reactions with imines to synthesize pyrrolidines. The formal [3 + 2] cycloaddition, which includes the in situ 1,3-carbon D-A precursor generation through metal catalysis, Lewis acid catalysis and organocatalysis approaches is highlighted. The scope and limitations of this strategy along with its applications in the synthesis of natural product alkaloids reported during the last decade are outlined. © 2014 the Partner Organisations.

Islam S.H.,Birla Institute of Technology and Science
Information Sciences | Year: 2015

Recently, the theory and application of Chebyshev polynomials have been studied extremely by the cryptographic research community; many symmetric and asymmetric cryptographic protocols have been designed based on extended chaotic maps. In this paper, a computation cost efficient and robust three party password-based authenticated key exchange (ECM-3PAKE) protocol with key confirmation has been designed using extended chaotic maps and smartcard. In this protocol, two users can establish a common session key with the help of a trusted server. The proposed protocol is shown to be provably secure in the random oracle model and formally validated through the simulation of Automated Validation of Internet Security Protocols and Applications (AVISPA) software. The simulation results from different model checkers of AVISPA proved that the protocol can withstand the active and passive attacks. Besides, the informal security analysis gives the evidence of security and functional efficiencies of the protocol. In addition, the comparative analysis illustrates that the protocol performs better than the existing protocols. © 2015 Elsevier Inc. All rights reserved.

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