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Journal of Biosciences and Medicines 2016年第7期4卷 12-22页

作者： kshetrimayum birla singh Department of Zoology Pachhunga University College Mizoram University Aizawl India

Metal ions played critical role in regulation of hypertension (HT) or blood pressure (BP). The physiological roles of metals commonly present in the diet in the etiology of HT need to be reviewed as recent survey on the metal status in the various vegetable and meat food stuffs commonly consumed by living population in India revealed an imbalance in its level. Higher levels of zinc (Zn) in diet is observed to increase the BP by various mechanisms including oxidative stress through decreased activity of superoxide dismutase (SOD) enzyme, increasing levels of angiotensin converting enzyme (ACE) and aldosterone and by causing acidification due to change in the levels of H+, Na+, K+ and Ca2+ ions in the blood. High level of copper (Cu) and low level of magnesium (Mg) and manganese (Mn) in the blood is also associated with HT through various mechanisms like elevation of chronic inflammation, accelerating Na+ pump of cell membrane and by disturbing lipid metabolism in the body. An epidemiological study conducted in the population of Manipur, India consuming Zn rich diet reveals significant disparities in distribution of the metals in the blood of the hypertensive (HTS) patients as compared to the normotensives (NT) control and thus indicates that the change in body metal homeostasis may be a triggering factor for the development of HT in this population and corroborate the reports of published literatures. The role of the metals variations in the body and their possible involvement in HT is reviewed and discussed in this paper.

关键词： Zn Cu Mg Mn Hypertension India

Long Term Excessive Zn Supplementation Induced Oxidative Stress in Wistar Rats Fed on Semi-Synthetic Diet

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Food and Nutrition Sciences 2012年第6期3卷 724-731页

作者： kshetrimayum birla singh Department of Zoology Pachhunga University College Mizoram University Aizawl India.

The use of Zn as micronutrient in husbandry and agriculture practices and also in baby foods and multivitamin supplements have been increased during the last two decades. However, the effect of long term increasing Zn load on the oxidative stress in the body has not been worked so far. The supplementation of pharmacological dosage of Zn in otherwise Zn adequate diet was investigated with the aim if excess Zn in the diet triggers oxidative stress and its conesquence on enzymes of antioxidant defense system. In this study, three groups of rats were fed on semi-synthetic diet containing 20 mg Zn/kg (control, group-I), 40 mg Zn/kg (group-II) and 80 mg Zn/kg (group-III) diet respectively for a period of 6 months. Blood lipid profile in the serum, lipid peroxidation status and the activities of antioxidant enzymes and trace minerals level were estimated both in the liver and kidney of three groups of rats. The study revealed that the gain in body weight increased in rats in Zn concentration dependent manner. The blood lipid profile displayed a significant rise in serum glucose, total lipids, cholesterol, triglycerides, LDL-cholesterol, VLDL-cholesterol whereas HDL-cholesterol showed a reduction in their levels in group-II and III than their control counter parts. The lipid peroxidation products were higher and the enzyme activities of superoxide dismutase, catalase, glutathione-s-transferase, glutathione reductase, glutathione (reduced) and glucose-6-phosphate dehydrogenase were significantly lowered in liver and kidney of group-II and group-III. Their mineral status revealed a higher Zn concentration and lower Cu, Mg and Mn both in liver and kidney. This data suggest that Zn in excess in diet when fed for longer periods of time induces oxidative stress by altering the status of minerals.

关键词： Zn Cu Mg Mn Lipid Peroxidation Antioxidant Enzymes Oxidative Stress Zn Supplementation

Stability and Leakage Analysis of a Novel PP Based 9T SRAM Cell Using N Curve at Deep Submicron Technology for Multimedia Applications

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Circuits and Systems 2011年第4期2卷 274-280页

作者： Shilpi birla Rakesh Kumar singh Manisha Pattanaik 不详

Due to continuous scaling of CMOS, stability is a prime concerned for CMOS SRAM memory cells. As scaling will increase the packing density but at the same time it is affecting the stability which leads to write failures and read disturbs of the conventional 6T SRAM cell. To increase the stability of the cell various SRAM cell topologies has been introduced, 8T SRAM is one of them but it has its limitation like read disturbance. In this paper we have analyzed a novel PP based 9T SRAM at 45 nm technology. Cell which has 33% increased SVNM (Static Voltage Noise Margin) from 6T and also 22%.reduced leakage power. N curve analysis has been done to find the various stability factors. As compared to the 10T SRAM cell it is more area efficient.

关键词： N Curve Scaling SVNM (Static Voltage Noise Margin) Leakage Power 9T SRAM Cell

Effect of Temperature &Supply Voltage Variation on Stability of 9T SRAM Cell at 45 nm Technology for Various Process Corners

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Circuits and Systems 2012年第2期3卷 200-204页

作者： Manisha Pattanaik Shilpi birla Rakesh Kumar singh Department of Electronics & Communications Bipin Chandra Tripathi kumaon Engineering College Dwarahat India Department of Electronics & Communications Sir Padampat Singhania University Udaipur India VLSI Group Atal Bihari Vajpayee Indian Institute of Information Technology and Management Gwalior India

Due to the continuous rising demand of handheld devices like iPods, mobile, tablets;specific applications like biomedical applications like pacemakers, hearing aid machines and space applications which require stable digital systems with low power consumptions are required. As a main part in digital system the SRAM (Static Random Access Memory) should have low power consumption and stability. As we are continuously moving towards scaling for the last two decades the effect of this is process variations which have severe effect on stability, performance. Reducing the supply voltage to sub-threshold region, which helps in reducing the power consumption to an extent but side by side it raises the issue of the stability of the memory. Static Noise Margin of SRAM cell enforces great challenges to the sub threshold SRAM design. In this paper we have analyzed the cell stability of 9T SRAM Cell at various processes. The cell stability is checked at deep submicron (DSM) technology. In this paper we have analyzed the effect of temperature and supply voltage (Vdd) on the stability parameters of SRAM which is Static Noise Margin (SNM), Write Margin (WM) and Read Current. The effect has been observed at various process corners at 45 nm technology. The temperature has a significant effect on stability along with the Vdd. The Cell has been working efficiently at all process corners and has 50% more SNM from conventional 6T SRAM and 30% more WM from conventional 6T SRAM cell.

关键词： DSM Technology Process Corners Write Margin Read Current Static Noise Margin

Analysis of 8T SRAM Cell at Various Process Corners at 65 nm Process Technology

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Circuits and Systems 2011年第4期2卷 326-329页

作者： Shilpi birla Neeraj Kumar Shukla Kapil Rathi Rakesh Kumar singh Manisha Pattanaik 不详

In Present scenario battery-powered hand-held multimedia systems become popular. The power consumption in these devices is a major concern these days for its long operational life. Although various techniques to reduce the power dissipation has been developed. The most adopted method is to lower the supply voltage. But lowering the Vdd reduces the gate current much more rapidly than the sub-threshold current and degrades the SNM. This degraded SNM further limits the voltage scaling. To improve the stability of the SRAM cell topology of the conventional 6T Static Random Access Memory (SRAM) cell has been changed and revised to 8T and 10T cell, the topologies. This work has analyzed the SRAM’s Static Noise Margin (SNM) at 8T for various process corners at 65nm technology. It evaluates the SNM along with the write margins of the cell along with the cell size of 8T SRAM bit-cell operating in sub-threshold voltage at various process corners. It is observed that an 8T cell has 13 % better write margin than conventional 6T SRAM cell. This paper analyses the dependence of SNM of SRAM memory cell on supply voltage, temperature, transistor sizing in 65nm technology at various process corners (TT, SS, FF, FS, and SF).

关键词： SNM Sub-Threshold Current Gate Current Process Corners

DEAHP Approach for Manpower Performance Evaluation

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Journal of the Operations Research Society of China 2014年第3期2卷 317-332页

作者： Sanjeet singh Remica Aggarwal Operations Managemen Department of Management Birla Institute of Technology and SciencePilani 333031India

The manpower in an organization constitutes an important and essential *** personnel endowed with individual academic and managerial strengths in specific disciplines and personal capabilities,who can undertake a variety of marketing or research assignments,are needed in any organization as they substantially credit to its *** of rational techniques for capability assessment during recruitment of personnel is therefore *** techniques that are normally employed for decision making in identification of performance attributes including their weight assignments include techniques like Delphi and decision matrix,Analytic Hierarchy Process(AHP)*** converts qualitative opinion of experts into quantified values and generates a decision *** this paper,we have integrated Data Envelopment Analysis(DEA)to generate local weights of alternatives from pair-wise comparison of judgment matrix used in the AHP for a three attribute system for measuring performance of personnel at entry level of managerial *** expert judgments have been considered for weight determination of the ***,DEAHP(i.e.,combined DEAAHP approach)has been proposed in this paper as an alternative to the traditional methods of weight derivation in AHP.

关键词： DEA AHP MCDM Performance evaluation Linear programming

A New Stable Algorithm to Compute Hankel Transform Using Chebyshev Wavelets

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Communications in Computational Physics 2010年第7期8卷 351-373页

作者： Rajesh K.Pandey Vineet K.singh Om P.singh PDPM Indian Institute of Information Technology Design and Manufacturing JabalpurIndia birla Institute of Technology and Science-Pilani Goa CampusGoaIndia Department of Applied Mathematics Institute of TechnologyBanaras Hindu UniversityVaranasiIndia

A new stable numerical method,based on Chebyshev wavelets for numerical evaluation of Hankel transform,is proposed in this *** Chebyshev wavelets are used as a basis to expand a part of the integrand,r f(r),appearing in the Hankel transform *** transforms the Hankel transform integral into a Fourier-Bessel *** truncating the series,an efficient and stable algorithm is obtained for the numerical evaluations of the Hankel transforms of order ν>−*** method is quite accurate and stable,as illustrated by given numerical examples with varying degree of random noise terms εθ_(i) added to the data function f(r),where θ_(i) is a uniform random variable with values in[−1,1].Finally,an application of the proposed method is given for solving the heat equation in an infinite cylinder with a radiation condition.

关键词： Hankel transforms Bessel functions Chebyshev wavelets random noise term

Motion through spherical droplet with non-homogenous porous layer in spherical container

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Applied Mathematics and Mechanics(English Edition) 2020年第7期41卷 1069-1082页

作者： P.K.YADAV A.TIWARI P.singh Department of Mathematics Motilal Nehru National Institute of Technology AllahabadPrayagraj 211004India Department of Mathematics Birla Institute of Technology SciencePilani 333031Rajasthan Department of Mathematics National Institute of Technology PatnaPatna 800005India

The problem of the creeping flow through a spherical droplet with a non-homogenous porous layer in a spherical container has been studied ***’s model for the flow inside the porous annular region and the Stokes equation for the flow inside the spherical cavity and container are used to analyze the *** drag force is exerted on the porous spherical particles enclosing a cavity,and the hydrodynamic permeability of the spherical droplet with a non-homogeneous porous layer is *** is placed on the spatially varying permeability of a porous medium,which is not covered in all the previous works related to spherical *** variation of hydrodynamic permeability and the wall effect with respect to various flow parameters are presented and discussed *** streamlines are presented to discuss the kinematics of the *** previous results for hydrodynamic permeability and drag forces have been verified as special limiting cases.

关键词： non-homogenous porous medium Stokes equation Darcy’s law perme-ability parameter wall effect

Hardware Chip Performance of CORDIC Based OFDM Transceiver for Wireless Communication

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Computer Systems Science & Engineering 2022年第2期40卷 645-659页

作者： Amit Kumar Adesh Kumar Geetam singh Tomar Faculty of Technology Uttarakhand Technical UniversityDehradun248007India Department of Electrical&Electronics Engineering School of EngineeringUniversity of Petroleum and Energy StudiesDehradun248007India birla Institute of Applied Sciences Nainital263136India

The fourth-generation(4G)and fifth-generation(5G)wireless communication systems use the orthogonal frequency division multiplexing(OFDM)modulation techniques and subcarrier *** OFDM modulator and demodulator have inverse fast Fourier transform(IFFT)and fast Fourier transform(FFT)*** biggest challenge in IFFT/FFT processor is the computation of imaginary and real *** has been proved one of the best rotation algorithms for logarithmic,trigonometric,and complex *** proposed work focuses on the OFDM transceiver hardware chip implementation,in which 8-point to 1024-point IFFT and FFT are used to compute the operations in transmitter and receiver *** coordinate rotation digital computer(CORDIC)algorithm has read-only memory(ROM)-based architecture to store FFT twiddle factors and their angle *** address generation unit is required to fetch the data and write the results into the memory in the appropriate *** provides low memory,delay,and optimized hardware on the field-programmable gate array(FPGA)in comparison to normal FFT architecture for the OFDM *** comparative performance of the FFT and CORDICFFT based OFDM transceiver chip is estimated using FPGA parameters:slices,flip-flops,lookup table(LUTs),frequency,power,and *** design is developed using integrated synthesis environment(ISE)Xilinx version 14.7 software,synthesized using very-high-speed integrated circuit hardware description language(VHDL),and tested on Virtex-5 FPGA.

关键词： 5G Communication CORDIC Algorithm FFT Virtex-5 FPGA OFDM Communication

A comprehensive review on hybrid electric vehicles: architectures and components

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Journal of Modern Transportation 2019年第2期27卷 77-107页

作者： Krishna Veer singh Hari Om Bansal Dheerendra singh Power Electronics and Drives Laboratory Department of Electrical and Electronics Engineering Birla Institute of Technology and Science

The rapid consumption of fossil fuel and increased environmental damage caused by it have given a strong impetus to the growth and development of fuelefficient vehicles. Hybrid electric vehicles (HEVs) have evolved from their inchoate state and are proving to be a promising solution to the serious existential problem posed to the planet earth. Not only do HEVs provide better fuel economy and lower emissions satisfying environmental legislations, but also they dampen the effect of rising fuel prices on consumers. HEVs combine the drive powers of an internal combustion engine and an electrical machine. The main components of HEVs are energy storage system, motor, bidirectional converter and maximum power point trackers (MPPT, in case of solar-powered HEVs). The performance of HEVs greatly depends on these components and its architecture. This paper presents an extensive review on essential components used in HEVs such as their architectures with advantages and disadvantages, choice of bidirectional converter to obtain high efficiency, combining ultracapacitor with battery to extend the battery life, traction motors’ role and their suitability for a particular application. Inclusion of photovoltaic cell in HEVs is a fairly new concept and has been discussed in detail. Various MPPT techniques used for solar-driven HEVs are also discussed in this paper with their suitability.

关键词： Hybrid electric vehicle Hybrid energy storage system Architecture Traction motors Bidirectional converter