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Delhi, India

Netaji Subhas Institute of Technology formerly Delhi Institute of Technology established in 1983. NSIT is one of the top engineering college in India. It is an autonomous institution of the Government of Delhi. The campus is situated at Azad Hind Fauj Marg, Sector - 3, Dwarka, New Delhi. The institute is affiliated to University of Delhi and was ranked as the 12th top engineering college by outlook india in 2014. Wikipedia.

Lahiri A.,Netaji Subhas Institute of Technology
Analog Integrated Circuits and Signal Processing | Year: 2011

This letter comments on the recently published paper in [1] which provides realizations of minimum component quadrature sinusoidal oscillators. On re-examination of the 'Type 3' oscillator circuits in [1], it has been found that the circuits actually suffer from 'latch up' problem due to use of incorrect polarity of the CCII based negative-impedance convertor. This problem has been corrected (without altering the characteristic equation) by swapping the impedances at y and x terminals. Explicit quadrature current outputs are derived similarly as done in [1]. © Springer Science+Business Media, LLC 2011. Source

Jena J.,Netaji Subhas Institute of Technology
Meccanica | Year: 2012

In this paper, Lie group of transformation method is used to investigate the self-similar solutions for the system of partial differential equations describing a plasma with axial magnetic field (θ-pinch). The arbitrary constants occurring in the expressions for the infinitesimals of the local Lie group of transformations give rise to two different cases of possible solutions i.e. with a power law and exponential shock paths. A particular solution to the problem in one case has been found out. © Springer Science+Business Media B.V. 2011. Source

Rana K.P.S.,Netaji Subhas Institute of Technology
Expert Systems with Applications | Year: 2011

A fuzzy logic based digital time domain sinusoidal acceleration waveform amplitude controller for an electrodynamic shaker is presented. The purpose of Fuzzy Logic Control (FLC) is to reproduce a pre-defined sinusoidal acceleration amplitude profile (in amplitude, frequency and time) at the shaker table. Sinusoidal vibration profiles (sine and logarithmic sine sweep) are considered for a controlled vibration generation in typical automotive and aerospace testing. The difficulty in sine sweep testing is that the non-rigid load dynamics are unknown and it can severely modify the shaker's performance during sweep test. Since a logarithmic frequency sweep is normally used, a controller needs to be robust to un-modeled dynamics and also fast enough to hold the desired acceleration amplitude within predefined limits throughout the sweep test. The controller structure is developed based on the usual power amplifier technology. The control action is implemented on a waveform-by-waveform basis and a FLC is developed in the LabVIEW environment on a PXI platform for real time control of the shaker. To attenuate the shaker suspension mode resonance a compensator based on electromechanical model of the shaker is designed and cascaded to FLC. The shaker model, suspension mode compensator design, FLC synthesis and experimental implementation results are presented in this paper. © 2011 Elsevier Ltd. All rights reserved. Source

Lahiri A.,Netaji Subhas Institute of Technology
Journal of Circuits, Systems and Computers | Year: 2010

A number of sinusoidal oscillators using current differencing buffered amplifiers (CDBAs) have been reported in the literature. However, only three of them are canonic quadrature oscillators (i.e., requiring two capacitors). The aim of this letter is to present additional realizations of single/dual- resistance-controlled quadrature oscillators using CDBAs. Four voltage-mode quadrature oscillators are proposed, which provide the following advantageous features: (i) use of reduced and canonic component count, viz. two CDBAs, three/four resistors and two capacitors, (ii) all passive components are grounded or virtually grounded, which is favorable from integration point of view and (iii) independent and non-interactive resistor control of the condition of oscillation (CO) and the frequency of oscillation (FO). Simulation results verifying the workability of the proposed circuits have been included. © 2010 World Scientific Publishing Company. Source

Singla R.K.,Netaji Subhas Institute of Technology
National Academy Science Letters | Year: 2014

Magnolol, phenolic bioactive phytomolecule, is a potential antihepatitis B viral agent. Current study is to mechanistically analyze the probable site of action for magnolol. Magnolol has been docked with EF3-CaM adenylyl cyclase (1PK0), deoxycytidine kinase (2NOA), human nucleoside diphosphate kinase (3FKB), human hepatitis B viral capsid (1QGT), hepatitis B X-interacting protein (3MSH) proteins using GRIP docking methodology, and compared with reference ligands like adefovir diphosphate (active metabolite of adefovir), lamivudine, tenofovir monophosphate (active metabolite of tenofovir) and tenofovir diphosphate (active metabolite of tenofovir). Results revealed its preferential interactability towards 2NOA i.e. deoxycytidine kinase, which raise up its chance to get metabolized into phosphorylated analogs, providing further impetus for discovery and clinical development of semi-synthetic analogs of magnolol. Out of all the virtually designed magnolol derivatives, Leadgrow-ML1449 have superior binding affinities towards all the test proteins except EF3-CaM adenylyl cyclase. © 2014 The National Academy of Sciences, India. Source

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