Skr Engineering College

Chennai, India

Skr Engineering College

Chennai, India
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Karthikeyan A.,Vel Technology Multi Technology Dr Rangarajan Dr Sakunthala Engineering College | Senthil Kumar P.,SKR Engineering College
Computers and Electrical Engineering | Year: 2017

Recently, 3D NoC has become more important than 2D NoC due its new geometrical arrangement and also reduces the wire length from global interconnect to local interconnect. One of the main components to implement 3D NoC is the router. The components of the router are crossbar, FIFO, and arbiter. The scheduling algorithm is the main part of the arbiter which schedules and delivers all packets to the destination nodes without any loss of packets. Packets that have the highest priority are served first,the remaning highest priority packets ares queued in the priority register and non-priority packets are served after all priority packets are served. Round Robin routing algorithm is commonly used as the scheduling algorithm in most of the routers. This paper proposes a novel 3D lottery routing algorithm which is based on arbitral mechanism like randomly prioritized buffer. Communication among the IPs in NoC can be customized by users through the lottery router. The lottery routing algorithm distinguishes the different priorities of the input port and makes sure that it responses to the higher priority port. The efficient hardware implementation of 3D NoC is proposed using Xilinx Spartan 3E FPGA, the result shows that the proposed architecture consumes 1644 slices out of 4656 slices and operates at the maximum frequency of about 103.602 MHz. The 3D NoC is modeled and implemented with a Cadence Electronic Design Automation tool and the results show that the power consumption of 3D NoC is reduced by 9% compared to a single layer. © 2017 Elsevier Ltd

Anand A.,Rashtreeya Vidyalaya College of Engineering | Senthil Kumar P.,Skr Engineering College
Journal of Computational and Theoretical Nanoscience | Year: 2015

Recently, LDPC plays a vital role in error floor performance near to Shannon limit. LDPC mainly suits, when length of the codeword is large, over the finite field. This paper presents parity check matrix of non-binary LDPC encoded innovatively with minimum distance by nearest nonzero code word spiral searching (NNCSS) approach. This will reduced the complexity of generating matrix and provide upper bound on minimum distance. The decoding of non-binary LDPC by message passing decoding (MPD) algorithm with layered approach will increase bit error rate performance. Normally, whenever layer approach increase the latency of processing time, which counterfeit by dynamic scheduling by its ability of correcting trapping set error. Simulation results of (1240, 310) NB-LDPC supports the proposed, NNCSS with dynamic scheduling. Observation that have been made based on the proposed algorithm. Finally we introduced the new encoding and decoding algorithm for NB-LDPC and achieved with low complexity. Copyright © 2015 American Scientific Publishers All rights reserved.

Senthil Kumar T.,Anna University | Senthil Kumar T.,SKR Engineering College | Annamalai K.,Anna University
Renewable Energy | Year: 2015

In this study, Kapok methyl ester was derived from Kapok seed oil by the two-step esterification process. The two-step process consists of acid-catalyzed pretreatment, followed by alkaline-catalyzed transesterification. The experimental investigation was carried out in a single-cylinder direct injection diesel engine, and the performance and exhaust emissions of the engine were also studied for the different blends of Kapok methyl ester. The results showed that the exhaust gas temperature and specific fuel consumption are increased for rich blends of Kapok methyl ester, but the brake thermal efficiency is decreased for the same blends. The NOx emission is higher than that of diesel at all load conditions of the engine. The lean blend of the Kapok methyl ester has appreciable engine efficiencies, lower values of smoke, and lower CO and HC emissions. Thus, the experimental results proved that the Kapok methyl ester is one of the most suitable alternatives to diesel fuel. © 2014 Elsevier Ltd.

Santha kumar R.,SKR Engineering College | Kaliyaperumal K.,University of Madras
Scientometrics | Year: 2015

This paper focus on the growth and development of mobile technology research in terms of publication output as reflected in Web of Science database. During 2000–2013 a total of 10,638 publications were published in the field. The average number of publications published per year was 759.86 and the highest number of publications 1495 were published in 2013. Output of total publications, 9037 were produced by multiple authors and 1601 by single authors. Authors from USA have contributed maximum number of publications compared to the other countries and India stood 16th ranking in terms of productivity in this study period. The most prolific author is Kim who contributed 42 publications followed by Kim with 36 publications. Collaboration Index ranges from 3.67 (2000) to 4.57 (2009) with an average of 4.32 per joint authored paper which implies the research team falls between 3 and 5 in the field of mobile technology. University of California System (USA) is the highly contributed institutions with 243 publications followed by University of London (UK) with 149 publications, Florida State University System (USA), National Chiao Tung University (China) with 88 publications. © 2015, Akadémiai Kiadó, Budapest, Hungary.

Anand A.,RVS College of Engineering and Technology | Senthilkumar P.,SKR Engineering College
Asian Journal of Information Technology | Year: 2016

Outstanding bit error rate LDPC design in waterfall region and error floor region is one of the challenging tasks for the past decade. In this study, we focus the design of LDPC encoder with low the error floor and waterfall region of BER with minimum trapping set Scheduled Progressive Edge Growth (SPEG) LDPC encoder innovatively, the simulation result of density evolution and exit chart give the better convergence of LDPC encoder, BER performance in error floor can controlled by minimum trapping set and waterfall region controlled by scheduled PEG LDPC encoder with (1000, 500) with code length (n) is >600. The girth of the SPEG encoder is 8. SPEG with minimum trapping set will perform well for short length code also and it converges faster than the other PEG encoder. © Medwell Journals, 2016.

Divya M.,SKR Engineering College | Janet J.,SVCE | Suguna R.,SKR Engineering College
Eurasip Journal on Image and Video Processing | Year: 2014

Telemedicine integrates information and communication technologies in providing clinical services to health professionals in different places. Medical images are required to be transmitted for diagnosis and opinion as part of the telemedicine process. Thus, telemedicine challenges include limited bandwidth and large amount of diagnostic data. Content-based image retrieval is used in retrieving relevant images from the database, and image compression addresses the problem of limited bandwidth. This paper proposes a novel method to enable telemedicine using soft computing approaches. In the present study, images are compressed to minimize bandwidth utilization, and compressed images similar to the query medical image are retrieved using a novel feature extraction and a genetic optimized classifier. The effectiveness of compressed image retrieval on magnetic resonance scan images of stroke patients is presented in this study. © 2014 Divya et al.; licensee Springer.

Vishnu Priya A.,Anna University | Senthil Kumar P.,SKR Engineering College
International Journal of Control Theory and Applications | Year: 2016

Optical Burst Switching (OBS) is one of the important fast growing technologies in the next-generation Internet. The burst scheduling is one of the challenging issues in OBS networks. Existing scheduling algorithms consider unscheduled time and time gap between two successive scheduled bursts on a channel. In this paper, we propose a wavelength division multiplexing (WDM) algorithm for the OBS networks. This algorithm is implemented in two stages as switching and scheduling. Switching takes care of wavelength routing and optical switching. The scheduler performs the link and traffic scheduling. The channel selection is based on wavelength grouping for both real time and non real time data bursts. The channel utilization is improved and the data burst loss is reduced. The simulation results show that the proposed WDM algorithm performs better when compared with the existing algorithms. © International Science Press.

Vasudevan P.,Anna University | Vasudevan P.,SKR Engineering College | Sankar S.,Anna University | Gokul Raj S.,Vel Tech Dr.RR & Dr.SR Technical University
Optik | Year: 2013

A crystalline organic nonlinear optical l-arginine maleate dihydrate has been grown by solution growth technique. Single crystal X-ray diffraction study confirms that the grown crystal belongs to triclinic system having non-centrosymmetric space group P1. The optical studies were carried out to estimate the transmission range, band gap, extinction coefficient, refractive index and reflectance of the grown crystal. The fundamental solid state parameters were determined from dielectric studies to analyze the polarizability and second harmonic generation efficiency of the grown crystal. Activation energy of the grown crystal was found to be 0.218 eV from ac conductivity measurements. © 2013 Elsevier GmbH.

Mohan A.,Anna University | Senthil Kumar P.,SKR Engineering College
Asian Journal of Information Technology | Year: 2016

Gridlock (Deadlock) independence is the most important dispute in developing multithreading programs. To avoid the potential risk of blocking a program, prior monitoring of threads can be used during the execution process. The proper monitoring scheme can able to monitor the threads that might enter to a deadlock stage, it maintains a backup to store the threads so after the execution of one thread the injection of the other thread can be made from backup into the processing stage. Today's parallel programs are difficult with deadlock problem further problem by the shift to multicore processors. By using this process, the deadlock can be avoided in the multithreading environment. Moreover, fixing other concurrency problems like races often involves introducing new synchronization which also cause the new set of deadlock. In the proposed system, we apply the different necessary condition for a deadlock, we implement the algorithm and report upon our experience applying it to a suite of multithreaded java program. It helps the threads to recover from deadlock situation and lets the threads complete their execution. © Medwell Journals, 2016.

Vasudevan P.,Anna University | Vasudevan P.,SKR Engineering College | Sankar S.,SKR Engineering College | Jayaraman D.,Presidency College at Chennai
Bulletin of the Korean Chemical Society | Year: 2013

L-Arginine semi-oxalate (LASO) single crystal has been grown by solution growth technique at room temperature. The crystal structure and lattice parameters were determined for the grown crystal by single crystal X-ray diffraction studies. Photoluminescence studies confirm the violet fluorescence emission peak at 395 nm. Optical constants like band gap, refractive index, reflectance, extinction coefficient and electric susceptibility were determined from UV-VIS-NIR spectrum. The dielectric constant, dielectric loss and ac conductivity of the compound were calculated at different temperatures and frequencies to analyze the electrical properties. The solid state parameters such as plasma energy, Penn gap, Fermi energy and polarizability were calculated to analyze second harmonic generation (SHG). Nonlinear optical property was discussed to confirm the SHG efficiency of the grown crystal.

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