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Pankajavalli P.B.,Mother Teresa Womens University | Arumugam N.,MNM Jain Engineering College
European Journal of Scientific Research | Year: 2011

Ad-hoc network is a collection of mobile nodes dynamically forming a temporary network without the use of any existing infrastructure or centralized administration. Building such a network poses many technical challenges such as routing, energy consumption, load balancing, and security. Routing in mobile ad-hoc network (MANETs) becomes more sophisticated issue especially when a certain quality of service (QOS) requirement is to be satisfied. This paper concentrates on two technical challenges such reliability in routing and energy consumption. In this paper an algorithm is proposed and implementation of this algorithm is done via simulation. Simulation results prove that the new algorithm performs better in terms of reliability, energy consumption. © EuroJournals Publishing, Inc. 2011. Source

Kalaivaani P.T.,MNM Jain Engineering College | Rajeswari A.,Coimbatore Institute of Technology
Wireless Personal Communications | Year: 2016

Wireless Sensor Networks (WSNs) are more popular due to the use of low cost sensors with their interfaces. In designing of WSNs, energy conservation is a main issue. The nodes available in WSNs use battery as limited energy source. Various techniques have been proposed to improve the energy efficiency in WSNs. Energy efficient Medium Access Control (MAC) protocol is required for obtaining higher energy efficiency during difficult operating conditions, where node failure and link failures are common. Cross layer approach between data link and network layer is adapted in the proposed work. In the proposed work, the MAC protocols such as Correlation based Collaborative MAC (CC-MAC), CC-MAC combined with Hybrid MAC, Hybrid MAC, Hybrid MAC combined with sensor MAC have been considered for analysis. Two popular routing protocols such as Ad hoc On-demand Distance Vector, Ad hoc On-demand Multipath Distance Vector are also considered to identify the routing performance of the network. The Parameters such as end-to-end delay, packet drop, packet delivery ratio, throughput, energy efficiency are considered to measure the network performance. These parameters are acting as a primary and secondary attributes to design an efficient MAC protocols for WSNs. © 2016 Springer Science+Business Media New York Source

Banu S.U.N.,MNM Jain Engineering College | Maheswaran G.,Salem College
International Journal of ChemTech Research | Year: 2015

Activated carbon was prepared from Eichornia crassipes by pyrolysis at 250°C. The plant biomass was impregnated with transition metal salt solution prior to pyrolysis. The activated carbon was charecterised by XRD, SEM and EDAX. The activated carbon was found to contain nanocrystallites embedded in it. Batch experiments were carried out for the adsorption of malachite green onto the prepared carbon. Equilibrium data for the adsorption process was fitted to two parameter and three parameter isotherm models, including Langmuir, Freundlich, Temkin and Dubinin-Radushkevich, Redlich-Peterson, Toth, and Koble-Corrigan. Linear and Non-linear regression methods were used to determine the best fit model to the equilibrium data. The data obtained was fitted to different kinetic models namely, pseudo first order, pseudo second order, intraparticle diffusion and Elovich model. Nanocrystallite embedded activated carbon was found to have superior adsorption capacity for malachite green, through physisorption, and can be used to treat waste water containing dyes. The kinetics follows pseudo second order mechanism under favourable adsorption conditions. © 2015, Sphinx Knowledge House. All rights reserved. Source

Karthikeyan C.,MNM Jain Engineering College | Rangachar,Hindustan University
ARPN Journal of Engineering and Applied Sciences | Year: 2015

To address the increasing demand for higher resolution and frame rates, processing speed (i.e. performance) and area cost need to be considered in the development of next generation video coding. Context-based adaptive binary arithmetic coding (CABAC) is the major entropy-coding algorithm employed in H.264/AVC. In this paper, subinterval reordering is proposed for the arithmetic decoder to increase the processing speed and to lower the frequency of memory access. Modification of the motion vector difference (MVD) context selection is proposed to reduce memory requirements and speed up the memory access. These above two methods and architecture optimizations are non-standard compliant and this proposed work is incorporated using buffers and registers for temporary storage and processing of the data. The speed of operation is improved by more than 50% with respect to normal operation. ©2006-2015 Asian Research Publishing Network (ARPN). Source

Sivabalakrishnan M.,Vellore Institute of Technology | Shanthi K.,MNM Jain Engineering College
Smart Innovation, Systems and Technologies | Year: 2016

Background subtraction is a very popular approach for foreground segmentation in a still scene image. A common approach is to perform background subtraction, which identifies moving objects from the portion of a video frame that differs significantly from a background model. Each video frame from the sequence is compared against a reference frame. There are several problems that a good background subtraction algorithm must resolve. To achieve robust background subtraction is required to have reliable and effective background estimation. In the existing system the background reference image is arbitrarily chosen. This paper presents a novel background estimation algorithm based on improved mode algorithm to obtain static background reference frame from input image. Evaluation of the background extraction is presented in this paper. The experimental results of using background image estimated by background estimation method are faster and accurate in background subtraction. The major goal is to obtain a clean static background reference image using a real-time video. © Springer International Publishing Switzerland 2016. Source

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