Entity

Time filter

Source Type


Narayana Y.V.,Sree Nidhi Institute of Science and Technology | Gunda J.B.,Advanced Systems Laboratory | Reddy P.R.,Chaitanya Bharathi Institute of Science and Technology | Markandeya R.,JNTUH College of Engineering
Journal of Structural Engineering (India) | Year: 2015

Imperfection sensitivity of cylindrical shells subjected to axial compressive load is investigated by means of nonlinear buckling analysis and post-buckling analysis. Nonlinear buckling analysis involves the determination of the equilibrium path (or load-deflection curve) upto the limit point load by using the Newton-Raphson approach, whereas post-buckling analysis involves the determination of the equilibrium path beyond the limit point and upto the collapse load by using the arc-length approach. Limit point loads evaluated from these two approaches for various imperfection magnitudes show an excellent agreement, which clearly confirms the numerical results obtained. Finally, the influence of L/D and R/t ratios on post-buckling behavior of isotropic and composite cylindrical shells is briefly highlighted. Source


Subba Rao S.P.V.,Sree Nidhi Institute of Science and Technology | Venkata Chalam S.,CVR College of Engineering | Sreenivasa Rao D.,JNTUCEH
2013 IEEE International Conference on "Smart Structures and Systems", ICSSS 2013 | Year: 2013

This paper describes the High capacity energy efficient Dynamic MAC protocol (HCEEDMAC) for WCDMA wireless multimedia networks to allocate system resources to multimedia users for QoS provisioning and for high resource utilization. The protocol is designed to support high capacity, Energy efficient and high throughput by using interference control and congestion control. High throughput is achieved by Dynamic MAC protocol (DMAC) using contention based scheduling. High capacity and Energy efficiency are achieved by using Adaptive Power Control technique (APC) which reduces the interference level and Adaptive Call Admission control (ACA) mechanism which controls the congestion by reducing the call blocking probability. By simulation results, we show that our proposed HCEEDMAC protocol achieves high capacity, Energy efficient and high throughput for multimedia data transmission. © 2013 IEEE. Source


Lakshmi N.K.,UGC Research Unit | Tiwari R.,UGC Research Unit | Bhargava S.C.,Sree Nidhi Institute of Science and Technology | Ahuja Y.R.,Genetics Unit
Genetics and Molecular Biology | Year: 2010

The potential effect of electromagnetic fields (EMFs) emitted from video display terminals (VDTs) to elicit biological response is a major concern for the public. The software professionals are subjected to cumulative EMFs in their occupational environments. This study was undertaken to evaluate DNA damage and incidences of micronuclei in such professionals. To the best of our knowledge, the present study is the first attempt to carry out cytogenetic investigations on assessing bioeffects in personal computer users. The study subjects (n = 138) included software professionals using VDTs for more than 2 years with age, gender, socioeconomic status matched controls (n = 151). DNA damage and frequency of micronuclei were evaluated using alkaline comet assay and cytochalasin blocked micronucleus assay respectively. Overall DNA damage and incidence of micronuclei showed no significant differences between the exposed and control subjects. With exposure characteristics, such as total duration (years) and frequency of use (minutes/day) sub-groups were assessed for such parameters. Although cumulative frequency of use showed no significant changes in the DNA integrity of the classified sub-groups, the long-term users (> 10 years) showed higher induction of DNA damage and increased frequency of micronuclei and micro nucleated cells. Copyright © 2009, Sociedade Brasileira de Genética. Source


Tiwari R.,UGC Research Unit | Lakshmi N.K.,UGC Research Unit | Bhargava S.C.,Sree Nidhi Institute of Science and Technology | Ahuja Y.R.,Genetics Unit
Electromagnetic Biology and Medicine | Year: 2015

There is apprehension about widespread use of electrical and electromagnetic gadgets which are supposed to emit electromagnetic radiations. Reports are controversy. These electromagnetic fields (EMFs) have considerable effect on endocrine system of exposed subjects. This study was focused to assess the possible bioeffects of extremely low-frequency (ELF)-EMFs on epinephrine level, DNA damage and oxidative stress in subjects occupationally exposed to 132 kV high-voltage substations. The blood sample of 142 exposed subjects and 151 non-exposed individuals was analyzed. Plasma epinephrine was measured by enzyme-linked immunosorbent assay, DNA damage was studied by alkaline comet assay along with oxidative stress. Epinephrine levels of sub-groups showed mean concentration of 75.22 ± 1.46, 64.43 ± 8.26 and 48.47 ± 4.97 for high, medium and low exposed groups, respectively. DNA damage ranged between 1.69 mm and 9.91 mm. The oxidative stress levels showed significant increase. The individuals employed in the live-line procedures were found to be vulnerable for EM stress with altered epinephrine concentrations, DNA damage and increased oxidative stress. © 2015 Informa Healthcare USA, Inc. Source


Bhargava P.V.,Sree Nidhi Institute of Science and Technology
International Conference on Electrical, Electronics, Signals, Communication and Optimization, EESCO 2015 | Year: 2015

In this paper, a novel low power double edge triggered flip-flop based on clock-gated pulse suppression technique is proposed. Incorporating this proposed technique with double edge triggered flip-flop reduces the power dissipation in the clocking system. The proposed technique suppresses all the redundant pulses of the clock cycle if the input remains unchanged. This technique is implemented using CMOS 90nm technology in Synopsys HSPICE. The proposed design aims at low power and low power-delay-product as compared to the conventional pulse triggered flip-flops. © 2015 IEEE. Source

Discover hidden collaborations