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Thandalam, India

Rajalakshmi Engineering College , , is a private engineering college located at Thandalam, Sriperumbudur near Chennai, Tamil Nadu, India. The college was established in 1997 by the Rajalakshmi Educational Trust, Rajalakshmi Institutions and has been approved by All India Council of Technical Education , New Delhi. Wikipedia.

Selvaraj C.,SSN College of Engineering | Anand S.,Rajalakshmi Engineering College
Peer-to-Peer Networking and Applications

The open and anonymous nature of P2P allows peers to easily share their data and other resources among multiple peers, but the absence of a defensible border raise serious security concerns for the users. There is a lack of accountability for the content that is shared by peers and it is hard to distinguish malicious users from honest peers. Establishing Trust relationship between peers can serve as the metric to determine the veracity of the shared content and reliability of the peers. Most of the research work in this area is on Reputation based trust management where trust is determined on the basis of recommendation of other peers. Such recommendations are subjective and can be biased. A number of peers can also collude to provide false testimony for malicious peers. This paper proposes a novel Trust model that combines peer profiling with anomaly detection technique. Each peer can establish trust based on its own prior activities with other peers by comparing the current activity of a peer with its historical data and Genetic Algorithm (GA) has been employed to detect the anomalous behavior. Peer profile is updated dynamically with every transaction using GA operator's crossover and mutation. This model has been tested using a file sharing application against common attacks and the results obtained are compared with statistical anomaly detection approach. © 2011 Springer Science+Business Media, LLC. Source

Saravanan S.,Sri Venkateswara College of Engineering | Nagarajan G.,Anna University | Sampath S.,Rajalakshmi Engineering College

In the present work the combined effect of fuel injection timing, percentage of EGR and fuel injection pressure in controlling the NOx emission of a stationary diesel engine fuelled with diesel was investigated. Three levels were chosen in each factor and NOx emission, smoke concentration and brake fuel conversion efficiency are taken as the response variables. Experiments were designed as per Taguchi's L9 orthogonal array and tests were conducted with different injection timings, percentage EGR (by volume) and injection pressures. Multi response signal to noise ratio (MRSN) was calculated for the response variables and the optimum combination level of factors was obtained simultaneously using Taguchi's parametric design. Obtained combination was confirmed experimentally and significant improvement was observed in the response variables. © 2010 Elsevier Ltd. All rights reserved. Source

Joice C.S.,Saveetha Engineering College | Paranjothi S.R.,Rajalakshmi Engineering College | Kumar V.J.S.,Anna University
IEEE Transactions on Industrial Informatics

Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital. This paper deals with the digital control of three phase BLDC motor. The motor is controlled in all the four quadrants without any loss of power; in fact energy is conserved during the regenerative period. The digital controller dsPIC30F4011, which is very advantageous over other controllers, as it combines the calculation capability of Digital Signal Processor and controlling capability of PIC microcontroller, to achieve precise control. © 2012 IEEE. 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

Gangadharana R.P.,Rajalakshmi Engineering College | Krishnanb S.S.,Sri Venkateswara College of Engineering
Acta Physica Polonica A

The molecular structure of 1-azanapthalene-8-ol was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian program. The results from natural bond orbital analysis have been analyzed in terms of the hybridization of atoms and the electronic structure of the title molecule. The stability of the molecule arising from hyper conjugative interactions, charge delocalization has been analyzed using natural bond orbital analysis. The electron density based local reactivity descriptors such as the Fukui functions were calculated. The dipole moment (μ) and polarizability (α), anisotropy polarizability (Δα) and first order hyperpolarizability (βtot) of the molecule have been reported. Source

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