Hussan M.I.T.,Paavai Engineering College |
Kalaavathi B.,KSR Institute for Engineering and Technology
KSII Transactions on Internet and Information Systems | Year: 2015
With the advancement of mobile web environments, identification and analysis of the user behavior play a significant role and remains a challenging task to implement with variations observed in the model. This paper presents an efficient method for mining optimized user behavior prediction model using genetic algorithm on mobile web structure. The framework of optimized user behavior prediction model integrates the temporary and permanent register information and is stored immediately in the form of integrated logs which have higher precision and minimize the time for determining user behavior. Then by applying the temporal characteristics, suitable time interval table is obtained by segmenting the logs. The suitable time interval table that split the huge data logs is obtained using genetic algorithm. Existing cluster based temporal mobile sequential arrangement provide efficiency without bringing down the accuracy but compromise precision during the prediction of user behavior. To efficiently discover the mobile users' behavior, prediction model is associated with region and requested services, a method called optimized user behavior Prediction Model using Genetic Algorithm (PM-GA) on mobile web structure is introduced. This paper also provides a technique called MAA during the increase in the number of models related to the region and requested services are observed. Based on our analysis, we content that PM-GA provides improved performance in terms of precision, number of mobile models generated, execution time and increasing the prediction accuracy. Experiments are conducted with different parameter on real dataset in mobile web environment. Analytical and empirical result offers an efficient and effective mining and prediction of user behavior prediction model on mobile web structure. © 2015 KSII.
Kannan J.C.,KSR Institute for Engineering and Technology |
Krishnakumar T.,Tagore Institute of Engineering and Technology |
Leonardi S.G.,Messina University |
Neri G.,Messina University
Sensors and Actuators, B: Chemical | Year: 2014
Crystalline tin oxide nanoparticles were successfully synthesized by microwave-assisted technique without any post annealing process. The morphology, microstructure and phase composition of the products obtained applying microwave irradiation for different time intervals were examined by XRD, FT-IR, SEM-EDX, TEM and HRTEM. Characterization results indicated that microwave irradiated products are composed of crystalline SnO2 nanoparticles which exhibit the cassiterite-type tetragonal crystal structure. The sensing properties of as-prepared SnO2 nanoparticles towards ethanol at low operating temperature were investigated. Such sensor devices exhibited good response to low concentrations of ethanol at temperature below 100 C. An abnormal sensing behavior was registered, that is the sensor resistance increases in the presence of ethanol maintaining, at the same time, the usual n-type behavior with other reducing gases such as CO. In contrast, after annealing the SnO2 nanoparticles at 400 C, the sensors show the expected regular behavior in all range of operating temperature investigated. A plausible mechanism, linked to a specific interaction between the surface of SnO2 and ethanol molecule through its hydroxyl group, was suggested in order to describe the unusual sensing behavior observed. © 2013 Elsevier B.V.
Devabharathi V.,KSR Institute for Engineering and Technology |
Palanisamy K.L.,Sengunthar Engineering College |
Meenakshi Sundaram N.,PSG College of Technology
Superlattices and Microstructures | Year: 2014
ZnO nanocrystals have been synthesized via simple precipitation method at different pH values. The synthesized nanocrystals are annealed at three different temperatures such as 400, 500 and 600 °C respectively. The X-ray diffraction pattern shows that synthesized ZnO nanocrystals are of hexagonal structure and the grain size was found to be in the range of 30-60 nm. The results also indicated that the crystallinity of the nanocrystals improved with increase of pH values and annealing temperature. Scanning electron microscopic image shows that the surface morphology improves with increase of pH values. Optical absorption studies show that the band gap has been found to lie in the range of 3.62-3.72 eV depending on pH suggesting the formation of ZnO nanocrystals. Dye sensitized solar cells prepared using ZnO nanocrystals synthesized at pH = 9 exhibits an enhanced short-circuit current density of 5.06 mA/cm2, open-circuit photo voltage of 0.61 V, fill factor of 0.65, and overall power conversion efficiency of 2.05%. © 2014 Elsevier B.V. All rights reserved.
Rajagopal C.,KS Rangasamy College of Technology |
Bhuvaneshwaran K.,KSR Institute for Engineering and Technology
Scientific World Journal | Year: 2015
WiMAX networks are the most suitable for E-Learning through their Broadcast and Multicast Services at rural areas. Authentication of users is carried out by AAA server in WiMAX. In E-Learning systems the users must be forced to perform reauthentication to overcome the session hijacking problem. The reauthentication of users introduces frequent delay in the data access which is crucial in delaying sensitive applications such as E-Learning. In order to perform fast reauthentication caching mechanism known as Key Caching Based Authentication scheme is introduced in this paper. Even though the cache mechanism requires extra storage to keep the user credentials, this type of mechanism reduces the 50% of the delay occurring during reauthentication. © 2015 Chithra Rajagopal and Kalaavathi Bhuvaneshwaran.
Murugesan P.,KSR Institute for Engineering and Technology |
Mayilsamy K.,Indian Institute of Road and Transport Technology |
Suresh S.,National Institute of Technology Tiruchirappalli
Experimental Heat Transfer | Year: 2012
This article reports an experimental investigation on the heat transfer, friction factor, and thermal enhancement factor of a tube equipped with vertical wing-cut twisted tapes, horizontal wing-cut twisted tapes, and plain twisted tapes with twist ratios of y = 2.0, 4.4, and 6.0. The obtained results reveal that the heat transfer rate, friction factor, and thermal enhancement factor in the tube equipped with horizontal wing-cut twisted tapes are significantly higher than those in the tube fitted with vertical wing-cut twisted tapes, plain twisted tapes, and a plain tube. An empirical correlation is subsequently derived from the experimental results. © 2012 Copyright Taylor and Francis Group, LLC.
Veena P.,KSR Institute for Engineering and Technology |
Indragandhi V.,SASTRA University |
Jeyabharath R.,KSR Institute for Engineering and Technology |
Subramaniyaswamy V.,SASTRA University
Renewable and Sustainable Energy Reviews | Year: 2014
Multi-input converters, used to integrate different renewable energy sources, accommodate a range of sources and pools to their advantage such that the energy source is diversified to enhance utilization and reliability of the renewable source. The literature reports the development of several front-end DC-DC converters that could interface the sources. The topologies were classified based on the energy conversion stages, namely, DC-DC boost converter and voltage source inverter, and the kinds of controllers that control the circuit to ensure stabilization of load and input voltage, maintain component tolerance and system ageing. This is a comprehensive study of mapping the progress of diverse inverter topologies from the recent literature. Advantages, disadvantages, and limitations are given in this critical literature survey, along with the basic operating principles of several topologies. © 2014 Elsevier Ltd.
Veena P.,KSR Institute for Engineering and Technology |
Indragandhi V.,Parisutham Institute of Technology and Science |
Jeyabharath R.,KSR Institute for Engineering and Technology
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013
In this study, an interleaved soft switching Boost Converter is used to track the maximum power point of PV array and full bridge inverter is used to stabilize the dc bus voltage. In this method, an interleaved technique is adopted to reduce the current rating of each device. Switching losses are reduced by adapting a zero voltage transition which increases the efficiency of the system. The experimental results are verified using Power SIM simulation software during open loop and closed loop operation. Compared to hard switching technique the results imply that 1% of overall efficiency is improved in this system. © Maxwell Scientific Organization, 2013.
Saravanan M.S.,Salem College |
Jeyabharath R.,KSR Institute for Engineering and Technology
International Journal of Applied Engineering Research | Year: 2014
In this paper, the structure for three phase H-bridge cascaded power converters is presented. Large electrical drives and utility application require advanced power electronics Converter to meet the high power demands. As a result, multilevel power converter structure has been introduced as an alternative in high power and medium voltage situations. It is shown that the inverter can simultaneously maintain the dc voltage level and choose a fundamental frequency switching pattern to produce a free harmonic sinusoidal output. HCMLI using only a single dc source for each phase is promising for highpower motor drive applications as it significantly decreases the number of required dc power supplies, provides high-quality output power due to its high number of output levels, and results in high conversion efficiency. the propose multilevel converter not only achieves high power rating but also improves the performance of the whole system in terms of harmonics. In this paper the proposed inverter can output more numbers of voltage levels with the advanced switching pattern. Finally, the simulation and experimental results validate the concept of this new topology. © Research India Publications.
Srinivasan N.,Kongu Engineering College |
Kannan J.C.,KSR Institute for Engineering and Technology
Materials Science- Poland | Year: 2015
Pure and aluminum doped zinc oxide nanoparticles were prepared by soft chemical method. The prepared nanoparticles were characterized by XRD, SEM-EDAX, UV-Vis, PL and FT-IR studies. XRD patterns revealed that the nanoparticles were crystallized in hexagonal wurtzite structure with an average particle size of 19 nm to 26 nm. The surface morphology was explored using SEM micrographs. The incorporation of aluminum was confirmed by EDAX and FT-IR studies. The band gaps of the particles were found from 3.48 eV to 3.53 eV through UV-Vis spectral studies. The defect related mechanism was investigated using PL measurements. The chemical functional groups in FT-IR spectra proved the formation of pure and aluminum doped zinc oxide nanoparticles. © Wroclaw University of Technology.
Parkavi B.,KSR Institute for Engineering and Technology |
Malathy G.,KSR Institute for Engineering and Technology
Asian Journal of Information Technology | Year: 2014
Cloud computing is an internet based computing where the computation is moved from single desktop to remote systems. Cloud computing provides a variety of computing resources from servers and storage to enterprise applications such as email, security, backup, etc., delivered over the internet. One of the major problems in cloud is the scheduling of resources dynamically based on user's request by optimizing quality of service, cost and time consumption. Since, resources are shared over a distributed environment, scheduling of those resources to the users is an important task in the cloud computing environment because billing is made as on-demand usage. This study surveyed various scheduling algorithms and compared with different parameters. © Medwell Journals, 2014.