Showing papers by "Kongu Engineering College published in 2006"

Age Classification using Fuzzy Lattice Neural Network

Abstract: This paper presents an age classification of a person from the gray scale facial images using Fuzzy Lattice Neural (FLN) model. The FLN model is a combination of fuzzy set theory, lattice theory and Adaptive Resonance Theory Neural model. The proposed system comprises of three sections, namely, location, feature extraction and age classification. From each facial image, three areas are located and three wrinkle features extracted from each location. The extracted nine (3x3) features are applied to FLN model. The FLN model trains the input and classifies the age of a person from the facial image. The proposed system is developed on MATLAB 6p1 and object oriented programming language C++. The success rate of the age classification is about 95% over Kwon and Lobo model and Wen, Chung and Chun model.

Superheating of Liquid Alkali Metals

Abstract: The maximum attainable temperature of superheating and the critical temperature of cesium, rubidium, and potassium are correlated using the generalized van der Waals equation of state. This study shows that the maximum attainable temperatures of superheating for liquid cesium, rubidium, and potassium are 1722, 1802, and 2039 K, respectively. The results of the determination of the maximum attainable temperatures of superheating of liquid cesium, rubidium, and potassium are in agreement with experimental data. The given study establishes that liquid cesium, rubidium, and potassium can be superheated up to temperatures of about 200 K below their critical temperatures of 1924, 2017, and 2280 K, respectively. Moreover, cesium, rubidium, and potassium have been found to obey the single-parameter law of corresponding states, with the maximum attainable reduced temperature of superheating as the thermodynamic similarity parameter.

Design of displacement amplifying compliant mechanisms with integrated strain actuator using topology optimization

Abstract: Compliant mechanisms are the focus of active research because of the stability, robustness, and ease of manufacturing endowed by their unitized construction. However, despite significant advances in the development of systematic design techniques for these mechanisms, currently compliant mechanisms are not capable of performing certain kinematic tasks that rigid body mechanisms can readily perform. This work explores the various advantages of the compliant mechanism and some of the difficulties in the design of the compliant mechanisms, and designing a compliant mechanism for displacement amplification of piezoelectric actuator is developed using a topological optimization approach. The overall stroke amplification of geometrical advantage of the mechanism and overall mechanical efficiency of the mechanism are considered as objective functions. The maximization of these objectives is accomplished using two different solution methods: a sequential linear programming and an optimality criteria method.

A study of fluid alkali metals in the critical region

Abstract: On the basis of the generalised van der Waals equation of state, Riedel's thermodynamic similarity parameter, a measure of the temperature dependence of vapour pressure in the critical region is determined for caesium, rubidium and potassium. This generalised equation differs from the known van der Waals equation of state by the modified expression for molecular pressure. The results of determination of Riedel's thermodynamic similarity parameter of caesium, rubidium and potassium are in good agreement with experimental data. Moreover, the given generalised van der Waals equation of state yields a better fit with experimental data on Riedel's thermodynamic similarity parameter for fluid alkali metals when compared with other correlations such as Van Ness and Abbott equation, Pitzer expansion, Pitzer acentric factor correlation, modified Rackett technique, Lee–Kesler vapour pressure relation and Clausius–Clayperon equation.

Analysis of IP Traceback Systems

Abstract: The problem of identifying the sources of a denial of service (DoS) and distributed denial of services (DDoS) attack is hardest in the Internet security area, because attackers often use incorrect or spoofed source addresses of IP packets. IP traceback system is to identify the origin of IP packets when the source address of these packets is spoofed. In the traceback system, routers are playing vital role and also ISP (Internet Service Provider) involvement is required to trace the origin of the spoofed packets. Several approaches have been proposed to trace IP packets to their origin. Our aim is to evaluate and analyses the most promising traceback approaches with our proposed system. We have implemented using NS-2 simulator and also evaluated and summarized the results.

Design and Performance Analysis of Proxy Discovery Routing in Mobile Ad Hoc Networks

Abstract: An adhoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the use of any existing network infrastructure or centralized administration Due to the limitations in the wireless environment, it may be necessary for one mobile host to enlist the aid of other hosts in forwarding a packet to its destination Thus, multiple networks "hops " may be needed for one node to exchange data with another across the network To accomplish this communication, a routing protocol is used to discover routes between these nodes The majority of existing ad hoc network routing protocols has a tendency to use the shortest single path from a source to a destination However, in constantly changing topologies such as those in mobile ad hoc wireless networks, the shortest single path is unreliable for reachability In order to improve routing performance, the congestion must first be relieved as much as possible and the routing path be made available at all times The proxy based indirect routing is used to control network traffic congestion and refine route availability by coping with unreliable links quickly It acting as a proactive routing protocol, utilizes additional information about the neighbours shared by the sender and the receiver to find an alternative for the original path with unreliable links It leads to a much improved system performance in terms of packet delivery ratio, average end-to-end packet delay, and network reliability