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Vasudevan P.,Anna University | Vasudevan P.,Skr Engineering College | Gokul Raj S.,Vel Tech Dr.RR & Dr.SR Technical University | Sankar S.,Anna University
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2013

l-arginine semi-oxalate single crystals have been synthesized by slow evaporation method at room temperature. Single crystal and powder X-ray diffraction analyses has been made to confirm the triclinic structure with non-centrosymmetric space group P1. The presence of functional groups of l-arginine semi-oxalate crystals was identified and confirmed by using the Fourier transform infrared spectroscopy. Molecular structure of the grown crystal was analyzed by 1H NMR and 13C NMR studies. Optical absorption studies carried out in wavelength range from 250 nm to 1200 nm have revealed that the material is completely transparent for the entire wavelength range studied. Thermal characterization using thermogravimetric analysis and differential scanning calorimetry studies show that the crystal is thermally stable up to 146 °C. The presence of second harmonic generation of the grown crystal was tested and its efficiency was determined by using Kurtz and Perry powder technique. © 2013 Elsevier B.V. All rights reserved.


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.


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.


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.


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.

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