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Arungalai Vendan S.,Vellore Institute of Technology | Chinnadurai T.,Vellore Institute of Technology | Senthil Kumar K.,Veltech Technical University | Prakash N.,Thangavelu Engineering College
International Journal of Advanced Manufacturing Technology | Year: 2015

Polycarbonate (PC) and ABS materials have several beneficial characteristics which facilitates its application in various industrial sectors, while developing products based on these polymers it is essential to enable the scope of its weldability feature. Considering this critical factor, researchers have been involved in investigating the weldability behavior of the above-mentioned polymers. However, there are no complete reports addressing the feasibility of welding of polymer mixtures. It has been observed that combination of two polymers with proper understanding of inbuilt chemical structures has yielded a hybrid polymer whose properties in terms of its strength, chemical bonding, structural integrity, and range of flexibility are higher. Hence, in this study, a pivotal attempt is made to develop a hybrid polymer with a combination of 60 % PC and 40 % ABS. Further, the polymer is subjected to ultrasonics to examine the conduciveness of this material for welding. The parameters controlling the weldability using ultrasonic’s are also varied within a range in order to identify the optimum parametric values. Subsequently, the welded specimens are tested for evaluating its strength and quality. Tests from the insight of chemical engineering is also carried out to access the chemical structural stability and to monitor the formation of the plastic which preferably adopts a thermoplastic feature. The results establish the feasibility and credibility of these polymers for welding which is the industrial demand. © 2015 Springer-Verlag London

Meikandan M.,Anna University | Senthil Kumar P.,Anna University | Paul I.D.,Veltech Technical University | Sathian C.,Veltech Engineering College
International Journal of Applied Engineering Research | Year: 2014

In recent decades, great progress has been made in theoretical, numerical, experimental investigations and applications in the fields related to thermo elastic vibrations, to meet the need of scientific research and engineering. Thermo elastic vibration is about the vibration of elastic bodies when the temperature and stress fields are coupled. This works provides an idea for the efficient conversion of this heat energy into electricity, and to have a comparison of various carbons based materials that could be utilized in the above cited experiment. It involves inducing thermo elastic vibrations in the membranes of carbon based material, and with this heat energy and using a Piezo electric effect to generate EMF. To counteract the environmental pollution and energy crisis, we manifest an energy efficient technique for the utilization of waste heat energy from automobiles. Here a carbon material is made to vibrate and these vibrations are induced by the thermal waste, from where the required frequency is obtained. This frequency emanated from the carbon material is because of its elastic property. The transformation of the mechanical vibrations of electromotive force (EMF) can be achieved, when the adjacent material (Say a wire) is in accordance with the piezoelectric material. This paper also described the practical pursuit of the above process and to enhance the efficiency and various carbons based material for this application and performance comparison. © Research India Publications.

Hemanth Chakravarthy M.,Veltech Technical University | Kannan E.,Veltech Technical University
International Journal of Applied Engineering Research | Year: 2014

Nowadays, a secured cloud is an important research issue due to its variety of customers, devices used for access, variant parameters and metrics involved. As the clouds are accessed by the modern hand held devices, smaller sizes of security keys are much preferred for encryption algorithm. RSA is a well known and most widely used asymmetric algorithm for the past few decades. Recent days, RSA with 2,048-bit key are used in modern computers which is required 8 times higher computations/processing than 1,024-bit RSA keys. Hence, it is not recommended for hand-held products like personal digital assistant and personal communication devices like cellular phones. Further, few researchers improved the performance of RSA using Chinese Remainder Theorem. Even though, it is still a question for those approaching the clouds using their hand held systems in terms of processing time, memory and bandwidth. Therefore, this paper proposes Hybrid Elliptic Curve Cryptography (HECC). © Research India Publications.

Udayaprakash N.K.,Veltech Technical University | Aravind R.,University of Madras | Kaviyarasan V.,University of Madras | Hariram S.B.,Veltech Hightech Dr Rangarajan Dr Sakunthala Rangarajan Engineering College
International Journal of Pharma and Bio Sciences | Year: 2011

In this study a comparison on antibacterial potency of common weeds i.e. Antigonon leptopus, Croton sparsiflorus and Lantana camara were conducted. Antibacterial efficacy on the microorganisms, Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Staphylococcus aureus were investigated. For this purpose, the leaf extracts of the plants were prepared using Acetone, Chloroform, Hexane and Methanol. The prepared extracts were analyzed for its bio-efficacy through Disc diffusion method. Among the solvent studied, Methanolic extract alone given positive results. The Hexane and Chloroform extract of all the three plants showed poor response in resisting bacterial growth. Among the plant studied, methanolic extract of Lantana camara possess greater activity than Croton sparsiflorus and Antigonon leptopus.

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