Tirunelveli, India
Tirunelveli, India

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Shanthi K.,Cape Institute of Technology | Murugan D.,Manonmaniam Sundaranar University
Wireless Networks | Year: 2016

In MANET, the most important issues are authentication of data packet in the network. Due to the hostile environment, security is major concern while data transmission. In order to overcome this issue, in this paper, we propose hop by hop group key agreement protocol where each node generates pairwise key for encryption of data. The session key is generated only between the nodes which is carrying the data packet for transmission. The key exchange can be performed between two nodes before data transmission. Ni constructs Lagrange interpolating polynomial with degree n − 1. Each Ni broadcasts the generated polynomial. After that, group key agreement protocol is used to provide complete authentication for those nodes. Simulation result show that the proposed algorithm is efficient as it minimizes bandwidth usage, delay, packet drop, and overhead, as well as fulfills all primary security concern, with improved delivery ratio and throughput. © 2016 Springer Science+Business Media New York

Rajini N.,Kalasalingam University | Winowlin Jappes J.T.,Cape Institute of Technology | Rajakarunakaran S.,Kalasalingam University | Bennet C.,Kalasalingam University
Chinese Journal of Polymer Science (English Edition) | Year: 2013

Studies on the behavior of molecular transport properties such as thermal conductivity, gas permeability, volume and surface resistivity have been carried out for the naturally woven coconut sheath (CS) fiber reinforced composites with the addition of nanoclay and chemical treatment of fiber. The compression molding technique was used to fabricate the coconut sheath/clay reinforced hybrid composites. The morphological studies such as X-ray diffractogram (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) have been carried out for polyester nanocomposites and coconut sheath fiber. The decreased gas permeability, thermal conductivity and volume and surface resistivity have been observed with increasing the weight percentage of nanoclay in polyester matrix. In chemical modifications, the alkali and silane treated coconut sheath reinforced composites have shown great influence on the transport properties due to the increasing hydrophilic nature by the topographical changes at the fiber surface. Dielectric strength has also been reported in this paper for all types of composites. Infra-red (IR) spectra have also been taken to study the physical and chemical structural changes of treated coconut sheath. © 2013 Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg.

Rajini N.,Kalasalingam University | Jappes J.W.,Cape Institute of Technology | Jeyaraj P.,Kalasalingam University | Rajakarunakaran S.,Kalasalingam University | Bennet C.,Kalasalingam University
Journal of Reinforced Plastics and Composites | Year: 2013

The untreated, NaOH and silane-treated naturally woven coconut sheath/polyester composites have been developed using compression molding technique by varying the weight percentage (1, 2, 3, and 5 wt%) of organically modified montmorillonite (MMT) nanoclay to find the mechanical properties as a function of temperature. X-ray diffraction, scanning electron microscope and transmission electron microscope have been performed to understand the distribution of nanoclay mechanism and morphological structure of treated coconut sheath fiber. Dynamic mechanical analysis revealed a decrease in storage modulus (E′) with the increase in temperature by a considerable fall in the temperature range of 50°C to 110°. The loss modulus (E″) and damping peaks (tan δ) were found to be higher after the chemical treatment of coconut sheath. The maximum increase in E′ and E″ values were found in the case of silane-treated composites. In all types of composites, the dynamic factors were observed to increase with the incorporation of nanoclay but the anomalous trend was noticed according to the wt%. A slight increase in shift of glass transition temperature value was noticed in association with the E″ peaks for silane and NaOH-treated composites compared to untreated composites. © 2013 The Author(s).

Rajini N.,Kalasalingam University | Jappes J.T.W.,Cape Institute of Technology | Rajakarunakaran S.,Kalasalingam University | Prabu M.,Kalasalingam University | Bennet C.,Kalasalingam University
Journal of Applied Polymer Science | Year: 2013

In this work, the impedance spectroscopy study has been carried out for the naturally woven coconut sheath fiber reinforced composite with the effect of adding different weight percentages of montmorillonite nanoclay and chemical activation of fiber. The dispersion mechanism of nanoclay with polyester, and the modification of the fiber surface have been studied by using X-ray diffractogram, transmission electron microscope and scanning electron microscope respectively. Infra-red spectra have also been taken to study the reactive compounds of treated fibers. The impedance spectrum shows significant improvement in A.C. conductivity, dielectric constant and loss tangent values by the fiber modification, using alkali and silane treatments, due to the structural topography changes at the fiber surface. The highest dielectric strength was found in alkali-treated coconut sheath/polyester composite due to increase in orientation polarization by the absorption of moisture content at fiber surface. The addition of different weight percentages of nanoclay with coconut sheath in all the treated conditions shows significant changes in the dielectric properties. Copyright © 2013 Wiley Periodicals, Inc.

Senthil Kumar K.,Kalasalingam University | Siva I.,Kalasalingam University | Jeyaraj P.,Indian National Institute of Engineering | Winowlin Jappes J.T.,CAPE Institute of Technology | And 2 more authors.
Materials and Design | Year: 2014

This work addresses the results of experimental investigation carried out on free vibration characteristics of short sisal fiber (SFPC) and short banana fiber (BFPC) polyester composites. Influence of fiber length and weight percentage on mechanical properties and free vibration characteristics are analyzed. Composite beam specimen is fabricated with random fiber orientations at17. MPa compression using compression molding machine. Natural frequencies and associated modal damping values of the composite laminates were obtained by carrying out the experimental modal analysis. It is found that an increase in fiber content increases the mechanical and damping properties. For SFPC, 3. mm fiber length and 50. wt% fiber content yielded better properties, whereas for BFPC, 4. mm fiber length and 50. wt% fiber content was the best combination. Scanning electron microscopy was performed to study the interfacial mechanism. © 2013 Elsevier Ltd.

Rajini N.,Kalasalingam University | Jappes J.T.W.,Cape Institute of Technology | Rajakarunakaran S.,Kalasalingam University | Jeyaraj P.,Kalasalingam University
Journal of Reinforced Plastics and Composites | Year: 2012

In this investigation, naturally woven coconut sheath is used as a new type of reinforcement. The hybrid composites are developed with the combination of naturally woven coconut sheath/E-glass/nanoclay using unsaturated polyester matrix and the effect of nanoclay on the mechanical and free vibration behavior is studied. It is found that the addition of nanoclay improved the mechanical and damping properties of the composite owing to the improved stiffness of the matrix by better dispersion of clay. In addition, the effect of alkali and silane treatments on fibers and different stacking sequence were investigated. It was observed that the alkali treatment of fibers improved the mechanical properties of the composites when cellulose fiber was present. This investigation presented a peculiar result in the case of silane treatment with the nanoclay, which is in contradiction with the earlier works. The stacking sequence of coconut sheath/coconut sheath/glass with alkali treatment of fibers provides the optimum increase in mechanical strength and free vibration characteristics. X-ray diffraction and transmission electron microscope were performed to understand the dispersion of nanoclay and its strengthening mechanism. In addition, scanning electron microscopy was used for fractography analysis. This investigation suggests an alternative material for the field of composites. © The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Velayudham A.,Cape Institute of Technology | Kanthavel R.,Velammal Engineering College
International Review on Computers and Software | Year: 2013

Computed tomography (CT) images are generally corrupted by several noises from the measurement process complicating the automatic feature extraction and analysis of clinical data. To achieve the best possible diagnosis it is important that medical images be sharp, clear, and free of noise and artifacts. While the technologies for acquiring digital medical images continue to improve, resulting in images of higher and higher resolution and quality, noise remains an issue for many medical images. Removing noise in these digital images remains one of the major challenges in the study of medical imaging. A variety of literatures have been developed to solve the problem of medical images denoising which is a significant stage in an automatic diagnosis system. In this paper, we propose a new image denoising technique using EMD and Dual Tree Complex Wavelet Packets. Here, histon process is used in order to overcome the smoothing filter type and it will not affect the lower dimensions. We have used two noises, like as Gaussian and salt & pepper for the proposed technique. The performance of the proposed image denoising technique is evaluated on the five CT images using the PSNR and SDME. For comparison analysis, our proposed denoising technique is compared with the existing work in various noise levels. From the results, we can conclude that the proposed denoising technique has shown the SDME of 48.33 but the existing technique show the PSNR of 39.84 for salt & pepper noise. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.

Williams A.S.,PET Engineering College | Malar R.S.M.,Cape Institute of Technology
Applied Mechanics and Materials | Year: 2014

In this project proposed a new concept of optimal utilization of a unified power quality conditioner. The series inverter of the UPQC is controlled to perform simultaneous voltage sag/swell compensation and load reactive power sharing with the shunt inverter. Kalman filter is designed to remove the harmonic components of the supply voltage and load current. The proposed method operates both in the time and frequency domains allowing the selective compensation of voltage and current harmonics with fast dynamical responses. The simulation is conducted by using MATLAB/SIMULINK. The simulation result shows the proposed UPQC has a good effect in the mitigation of the voltage sag. © (2014) Trans Tech Publications, Switzerland.

Raja A.S.,Cape Institute of Technology
Journal of Multiple-Valued Logic and Soft Computing | Year: 2015

Biometrics has been gaining attraction due to the ever-growing demand of this field of research on access control, public security, forensics and e-banking. However, there are still many challenging problems in improving the accuracy, robustness, efficiency, and user-friendliness of these biometric systems. In this manuscript a new adaptive multi-modal biometric framework based on super Self Organizing Maps (super SOM) for the recognition of individuals using palm print, ear and face is proposed. It is showed that the proposed framework helps to improve the performance and robustness of recognition when compared to standard methods in literature namely Sequential Float Feature Selection and Principal Component Analysis. The major focus of this approach is to keep the framework adaptive and robust, thereby, capable of being used in a wide variety of environments. Moreover some new directions on which super SOM shall be effectively used in biometrics community is also discussed. Towards the end, an arity dimensionality concept (inspired from biology) which further enhances the efficiency of this framework is also used. All the findings are showed with experimental results. © 2015 Old City Publishing, Inc.

Raja A.S.,Cape Institute of Technology
International Journal of Oceans and Oceanography | Year: 2014

One of the most commonly asked questions by fisherman, at some point in time, are "What is it?" Knowing what you caught is extremely important for many reasons; including the reason that misidentification can lead to violations of fisheries regulations. Recent years have witnessed new research interest in the study of network science, in domains like biological systems, social networks etc. Seminal works covering each of these systems have appeared in high impact journals like Nature, Science, etc. Unifying principles have emerged and helped in gaining new understanding in a domain by extending the understanding gained in other domains. These developments in network science open up possibilities in the research into image processing. We abstract the image of different type of prawn (Tiger, Flower and King) as a network/graph, where the nodes/vertices correspond to rows/columns represented by the pixels and edges correspond to presence of any non-zero value present in the pixel represented by {row i, column j}. Network science research in biology defines motifs as recurring sub-graphs from which the network is built. They also argue motifs as simple building blocks of complex networks, offering a way to understand the basic functionality of a system. In this paper, we explore Tiger, Flower and King Prawn images from literature for the study of motifs. We discover motifs within each characteristic and also interesting motif templates across them. We use this idea and propose a new low level classifier for vision to conclude that motifs could be used for sea water fish identification to avoid violation of fisheries regulation. © Research India Publications.

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