Motilal Nehru National Institute of Technology Allahabad

About: Motilal Nehru National Institute of Technology Allahabad is a education organization based out in Allahabad, Uttar Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 2475 authors who have published 5067 publications receiving 61891 citations. The organization is also known as: NIT Allahabad & Motilal Nehru Regional Engineering College.

Model reduction of discrete interval system using dominant poles retention and direct series expansion method

Abstract: This paper presents a method for reduction of discrete interval system using Pade approximation. For a given high-order system, denominator of the reduced model is obtained by retaining dominant poles of the original system and the numerator is obtained by matching first r time moments of the system and its model. The time moments are calculated using novel method i.e. direct series expansion method. Numerical example is given to illustrate the procedure.

Stability and Sensitivity Analysis of Uniformly Sampled DC-DC Converter With Circuit Parasitics

Abstract: In this paper the stability and sensitivity function of three basic dc-dc converter with the consideration of circuit parasitics has been analyzed for analog and digital controller implementation. The steady state and small-signal analysis has been used to derive the mathematical expressions for uniformly sampled voltage-mode controlled converters. The effect of digital controller using the ratio of sampling to carrier frequency has been analyzed. The sampling frequency limits the voltage gain in the stepped manner and also affects the stability of the digitally controlled converter. The sensitivity function has been defined for voltage gain with respect to various system parameters. The maximum affected regions on duty ratio scale with corresponding parasitic variable have been discussed. The detailed stability analysis has been carried out for digitally implemented three basic dc-dc converters, i.e., buck, boost, and buck-boost circuits. The analytical results are verified with the simulations performed in PSCAD/EMTDC. An FPGA controller is considered as digital controller for the dc-dc converter and verification of the results through experiment.

Tracing the role of plant proteins in the response to metal toxicity: a comprehensive review.

Abstract: Plants are sessile in nature, but are capable to evade from high level concentration of heavy metals like Cd, Hg, Cu, through various metabolic pathways Some of the pathways regulate normal metabolism in plants, whereas others are required for for their survival under metal toxicity Different plant proteins act as transporters to transfer metal from one organelle to the other and further eliminate it out from the plants Initially, exposure of heavy metals/metalloids to plants lead to over expression of proteins which in turn stimulate other stress-related genes Further, they activate signalling mechanism like MAPK cascade, Cd-Calmodulin signalling pathway, and oxidation signalling pathway that lead to generation of ROS (reactive oxygen species) Once these ROS (highly unstable) are formed, they generate free radicals which react with macromolecules like proteins and DNA This has negative impact on plant growth and leads to ageing and, eventually, cell death The uncontrolled, destructive processes damage plants physiologically and ultimately lead to oxidative stress Activation of antioxidant enzymes like SOD (superoxide dismutase) and CAT (catalase) allows plants to cope under oxidative stress conditions Among plant proteins, some of the antioxidant enzymes like glutathione, and APX (ascorbate peroxidase) play defensive roles against abiotic stress in plants Chaperones help in protein folding to maintain protein stability under stress conditions With this background, the present review gives a brief account of the functions, localization and expression pattern of plant proteins against metal/metalloid toxicity Moreover, the aim of this review is also to summarize the cutting edge research of plant protein and metal interfaces and their future prospects

Disorder on the landscape

Abstract: Disorder on the string theory landscape may significantly affect dynamics of eternal inflation leading to the possibility for some vacua on the landscape to become dynamically preferable over others. We systematically study effects of a generic disorder on the landscape, starting by identifying a sector with built-in disorder—a set of de Sitter vacua corresponding to compactifications of the type IIB string theory on Calabi–Yau manifolds with a number of warped Klebanov–Strassler throats attached randomly to the bulk part of the Calabi–Yau. Further, we derive a continuum limit of the vacuum dynamics equations on the landscape. Using methods of the dynamical renormalization group we determine the late-time behavior of the probability distribution for an observer to measure a given value of the cosmological constant. We find the diffusion of the probability distribution to significantly slow down in sectors of the landscape where the number of nearest-neighboring vacua for any given vacuum is small. We discuss the relation of this slowdown with the phenomenon of Anderson localization in disordered media.

Soliton solutions of BLMP equation by Lie symmetry approach

Abstract: Shallow water wave equations are usually described by Korteweg–de Vries (KdV)-type equations. In this paper, we have used Lie transformation group theory to solve (2+1)-dimensional Boiti–Leon–Manna–Pempinelli (BLMP) equation. We have obtained some exact solutions of BLMP equation in the explicit form through similarity reduction. All the reported results are expressed in closed form and analysed physically through their evolution profiles. The physical analysis reveals that the nature of solutions is parabolic, quasi-periodic, multisoliton and asymptotic.