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Chennai, India

Sri Sivasubramaniya Nadar College of Engineering , popularly known as SSN, is an engineering institution located in Chennai, Tamil Nadu, India. The college is certified to ISO 9001:2000 standard by the National Board of Accreditation. Wikipedia.

Suganthi N.,SSN College of Engineering
Journal of environmental science & engineering

The adsorption of Ni(II) and Pb(II) from aqueous solutions by Phosphorylated Tamarind Nut Carbon (PTNC) was investigated. The effects of contact time, pH and carbon dose were studied in batch experiments at 30 degrees C. The equilibrium process was determined by Freundlich and Langmuir isotherm models. The kinetic studies showed good correlation for a pseudo-second-order kinetic model. Column studies were conducted in 2.5cm diameter columns. The applicability of PTNC for wastewaters containing Ni(II) and Pb(II) was evaluated. The mechanism of adsorption of metals on PTNC was found to follow ion exchange process predominantly and was supported by FTIR. The metal removal was also confirmed by SEM studies. Source

Sathiyamoorthy M.,SSN College of Engineering | Chamkha A.,Public Authority for Applied Education and Training
International Journal of Thermal Sciences

A numerical study is presented for natural convection flow of electrically conducting liquid gallium in a square cavity. In the cavity, the bottom wall is uniformly heated and the left vertical wall is linearly heated whereas the right vertical wall is linearly heated or cooled while the top wall kept thermally insulated. A uniform magnetic field inclined at an angle φ with respect to horizontal plane is externally imposed. Penalty finite element method with bi-quadratic rectangular elements is used to solve the non-dimensional governing equations. Numerical results are presented for wide range of Hartmann number (Ha = 0-100) with inclined angles (φ=0,π/2) for high Rayleigh number Ra = 105 in terms of stream functions and isotherm contours, local and average Nusselt number. The results shows that the magnetic field with inclined angle has effects on the flow and heat transfer rates in the cavity. It is also found that the average Nusselt number decreases non-linearly by increasing Hartmann number for any inclined angle. © 2010 Elsevier Masson SAS. All rights reserved. Source

Selvaraj C.,SSN College of Engineering | Anand S.,Rajalakshmi Engineering College
Computer Science Review

The objective of this paper is to present a comprehensive survey of security issues in Reputation based Trust Management system (RTMS) also known in short as Reputation Management Systems for P2P networks. The wide adoption of P2P computing has enhanced content publishing, pervasive information collection, streaming of real-time sensed data and information sharing on an enormous global scale. At the same time, the open and anonymous nature of P2P makes it vulnerable to malicious attacks and the spread of malware. In this paper, we discuss in detail the different security attacks on P2P systems and have categorized them as network-related and peer-related attacks. RTMS helps to establish and evaluate Trust, which is the degree of belief that is established to prove that the right user is accessing the right resource. We have explained the different Trust Management schemes used in P2P networks and have compared them on the basis of trust establishment, security features, trust evaluation and weakness. We have surveyed the RTMSs currently in use and have compared them on the basis of reputation collection, aggregation, computation, storage and degree of centralization of reputation computation and management. We also present a comparison of protection provided by RTMs against the various security attacks discussed. Open research issues and challenges that have yet to be addressed in the design of current RTMs have been presented in detail. This survey can be used as a reference guide to understand Trust Management and RTMS for P2P networks and to further research in RTMSs to make them efficient, reliable and scalable to enable and promote the utilization of P2P systems for large communities and applications. © 2012 Elsevier Inc. Source

Sriraam N.,SSN College of Engineering
Expert Systems with Applications

Auditory dysfunction is one of the most common deficiencies present in the newborn. Recent studies show that significant bilateral hearing loss is present in ∼1 to 3 per 1000 newborn infants in the well-baby nursery population and in ∼2 to 4 per 1000 infants in the ICU population. The ignorance of hearing screening test at the initial stage will impede speech, language and cognitive development. It has been further noted that direct physician observation as well as parental recognition has not been significantly successful until today in identifying the hearing loss in the first year of life. To overcome such problems, early screening is essential. This paper presents a pilot study on detection of hearing loss by applying electroencephalography (EEG) signals as the key indicator. The effect of auditory evoked potential (AEP) is exploited on EEGs by introducing an external stimulus to the subject's auditory canal. Two time domain features, spike rhythmicity, autoregressive model using Levinson-Durbin algorithm and frequency domain features such as power spectral density estimation by Burg's and Yule-Walker methods are applied. Feed forward and feedback neural network models are used to distinguish the stimuli and non-stimuli EEGs. The neural network models are configured optimally by varying the hidden neurons and learning algorithms and their performance are evaluated in terms of specificity, sensitivity and classification accuracy. It can be concluded from the experimental study that the proposed methodology can be applied for neonatal healthcare applications. © 2011 Elsevier Ltd. All rights reserved. Source

Senthil Kumar P.,SSN College of Engineering
Colloid Journal

Neem sawdust was used to develop an effective carbon adsorbent. This adsorbent was used for the removal of Congo Red (CR) from aqueous solution. The data suggest that the pH of aqueous solutions influences CR removal due to the decrease of removal efficiency with increasing pH. An optimal pH < 3 for the adsorption of CR onto neem sawdust carbon (NSDC) was determined. The experimental data were analysed by the Langmuir, Freundlich, Redlich-Peterson, Toth, Temkin, Sips and Dubinin-Radushkevich models of adsorption. Three simplified kinetic models based on pseudo-first-order, pseudo-second-order and intraparticle diffusion equations were used to describe the adsorption process. It was shown that the adsorption of CR could be described by the pseudo-second-order equation, suggesting that the adsorption occurs as a chemisorption process. The results indicate that the NSDC can be used as a low cost adsorbent alternative to commercial activated carbon for the removal of dyes from wastewaters. © 2010 Pleiades Publishing, Ltd. Source

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