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Search Results: 1 - 10 of 325407 matches for " S. Sathiyamoorthy "
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Fuzzy Based Intelligent Monitoring of Critical Lines in the Restructured Power Market  [PDF]
S. Rajasekaran, S. Sathiyamoorthy
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.79191
Abstract: Restructured electric market environment allows the power wheeling transactions between the power producers and customers to meet the growing load demand. This will lead to the possible of congestion in the transmission lines. The possible contingencies of power components further worsen the scenario. This paper describes the methodology for the identification of critical transmission line by computing the real power and reactive power performance indices. It also demonstrates the importance of fuzzy logic technique used to rank the transmission lines according to the severity and demonstrated on IEEE-30 bus system.
Modeling and Implementation of AC Electrical Capacitance Tomography  [PDF]
K. Manikandan, S. Sathiyamoorthy
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.711319
Abstract: Electrical Capacitance Tomography (ECT) determines the dielectric permittivity of the interior object depending on the measurements of exterior capacitance. Generally, the electrodes are placed outside the PVC cylinder where the medium to be imaged is present; but in ECT using inter-electrode capacitance measurements can be achieved by placing inside of the dielectric medium. In the proposed ECT system, the ECT sensor is modeled using ANSYS software and the model is implemented in real ECT system. For each step of measurement, a stable AC signal is applied to a pair of electrodes that form a capacitor. The novel system is to measure the capacitance range variation in picofarad and the corresponding voltage ranges?from 1volt to 4volts. The switching speed of all combinational electrodes is implemented using embedded system to achieve higher speed performance of AC ECT system which eliminates the drift and stray capacitance error. This is yielding the original image of unknown multiphase medium inside the electrodes using Lab VIEW. This paper investigates several advantages such as improved overall system performance; simple structure, avoids stray capacitance effect, reduces the drift problem and achieves high signal to noise ratio.
Determination of optimal reserve between two machines in series with truncation point in repair time distribution
S. Srinivasan,P. Sheik Uduman,R. Sathiyamoorthy
Applied Mathematical Sciences , 2012,
A Server Side Solution for Protection of Web Applications from Cross-Site Scripting Attacks
International Journal of Innovative Technology and Exploring Engineering , 2013,
Abstract: Cross-Site scripting attacks occur when accessing information in intermediate trusted sites. Cross-Site Scripting (XSS) is one of the major problems of any Web application. Web browsers are used in the execution of commands in web pages to enable dynamic Web pages attackers to make use of this feature and to enforce the execution of malicious code in a user’s Web browser. This paper describes the possibilities to filter JavaScript in Web applications in server side protection. Server side solution effectively protects against information leakage from the user’s environment. Cross-Site scripting attacks are easy to execute, but difficult to detect and prevent. The flexibility of HTML encoding techniques, offers the attacker many possibilities for circumventing server-side input filters that should prevent malicious scripts from being injected into trusted sites. Cross site scripting (XSS) attacks are currently the most exploited security problems in modern web applications. These attacks make use of vulnerabilities in the code of web-applications, resulting in serious consequences, such as theft of cookies, passwords and other personal credentials. It is caused by scripts, which do not sanitize user input.
Protection of Privacy in Visual Cryptography Scheme Using Error Diffusion Technique
International Journal of Computer Science and Network , 2013,
Abstract: Visual Cryptography Scheme (VCS) is a cryptographictechnique which allows visual information to be encrypted insuch a way that the decryption can be performed by the humanvisual system without the aid of computers. As networktechnology has been greatly advanced, much information istransmitted via the internet conveniently and rapidly. At thesame time, the security issue is a crucial problem in thetransmission process. This method aims to build acryptosystem that would be able to encrypt any image, so thatthe encrypted image when intercepted by any person withmalicious intentions during the time of transmission of theimage is unable to decipher the image. Visual CryptographyScheme allows encoding a secret image into n sharesdistributed to n participants. The beauty of such a scheme isthat a set of qualified participants are able to recover the secretimage without any cryptographic knowledge and computationdevices. An extended visual cryptography scheme (EVCS) is akind of VCS which consists of meaningful shares (compared tothe random shares of traditional VCS). In this paper wepropose error diffusion technique to achieve good qualityreconstructed image and to increase security with minimumPixel Expansions and we can use this algorithm for differentimage formats.
Design, Simulation and Experimental Analysis of Wideband Circularly Polarized Capacitive FED Microstrip Antenna
Sathiyamoorthy Murugan;Vayanaperumal Rajamani
PIER C , 2012, DOI: 10.2528/PIERC12032601
Abstract: Wideband Circularly polarized antenna receive much attention in the wireless communication applications such as Global positioning system (GPS) and Personal communication system (PCS). In this paper, a microstrip square patch, truncated in opposite corners, suspended above the ground plane is proposed. The geometry incorporates the capacitive feed strip which is fed by a coaxial probe. The proposed structure is designed, simulated and fabricated to cover the entire frequency of GPS, i.e., (1.575 GHz), (1.227 GHz), and (1.176 GHz), covering from (1.15 GHz-1.6 GHz). The parameters such as return loss, VSWR, impedance, radiation efficiency axial ratio and radiation pattern are used for analyzing the performance of the antenna. Both simulated and experimental results are presented and they exhibit broadband characteristics, covering the desired frequency bands.
Real Time Monitoring of Fluorescent Particles in Micro-Channels by High Resolution Dual Modality Probe Imaging  [PDF]
Krishnan Sathiyamoorthy, Valiyambath Krishnan Mohankumar, Vadakke Matham Murukeshan
Optics and Photonics Journal (OPJ) , 2011, DOI: 10.4236/opj.2011.14031
Abstract: Imaging of micro particles in micro-fluidic channels is one of the recent thrust areas in research as it provides more flexibility in setup and analysis compared to conventional microscopy. However, a probe based imaging scheme, with achievable high resolutions incorporating multimodal analysis is one of the challenges researchers have been facing. In this context, this paper illustrates a simple dual modality high resolution flexible probe imaging system for imaging applications in micro/optofluidic channels. The proposed system exhibits axial and lateral resolution of about 16 μm and 3.12 μm respectively. This proposed system also exhibits a modulation transfer function (MTF) of about 38.42 %. The performance of the system is validated by imaging micro particles in a microchannel and obtaining the fluorescent emission spectrum simultaneously.
Mesh Based Peer to Peer Live Video Streaming using ANT Algorithm
International Journal of Engineering and Advanced Technology , 2013,
Abstract: Data distribution and data retrieval has always been an integral part of the Internet. In particular, video streaming has been gaining popularity over the last few decades. Though there has been no shortage of innovations and Experimentations, no single system has been able to deliver highly scalable and reduce congestion to the requesting users. The development of p2p technologies brings unprecedented new momentum to Internet video streaming. This work proves that p2p is indeed more efficient by taking into account the factors of scalability, response time and reliability of serving the request. This work is broadly and logically divided into joining the network group, requesting, retrieving and video playing segments. The Requester takes care of receiving the file and storing it in the buffer. The video receiver takes care of sensing the user connections and playing the appropriate video on the requesting peer side. To provide video in efficient manner, this work use ACO (Ant Colony Optimization) algorithm and bandwidth for choosing optimized peer. From that optimized peer, user can get video. We also take care of scheduling and scalability issues.
Assembly and Architecture of the EBV B Cell Entry Triggering Complex
Karthik Sathiyamoorthy,Jiansen Jiang,Yao Xiong Hu,Cynthia L. Rowe,Britta S. M?hl,Jia Chen,Wei Jiang,Elizabeth D. Mellins,Richard Longnecker,Z. Hong Zhou,Theodore S. Jardetzky
PLOS Pathogens , 2014, DOI: doi/10.1371/journal.ppat.1004309
Abstract: Epstein-Barr Virus (EBV) is an enveloped double-stranded DNA virus of the gammaherpesvirinae sub-family that predominantly infects humans through epithelial cells and B cells. Three EBV glycoproteins, gH, gL and gp42, form a complex that targets EBV infection of B cells. Human leukocyte antigen (HLA) class II molecules expressed on B cells serve as the receptor for gp42, triggering membrane fusion and virus entry. The mechanistic role of gHgL in herpesvirus entry has been largely unresolved, but it is thought to regulate the activation of the virally-encoded gB protein, which acts as the primary fusogen. Here we study the assembly and function of the reconstituted B cell entry complex comprised of gHgL, gp42 and HLA class II. The structure from negative-stain electron microscopy provides a detailed snapshot of an intermediate state in EBV entry and highlights the potential for the triggering complex to bring the two membrane bilayers into proximity. Furthermore, gHgL interacts with a previously identified, functionally important hydrophobic pocket on gp42, defining the overall architecture of the complex and playing a critical role in membrane fusion activation. We propose a macroscopic model of the initiating events in EBV B cell fusion centered on the formation of the triggering complex in the context of both viral and host membranes. This model suggests how the triggering complex may bridge the two membrane bilayers, orienting critical regions of the N- and C- terminal ends of gHgL to promote the activation of gB and efficient membrane fusion.
Probing the Structure, Stability and Hydrogen Adsorption of Lithium Functionalized Isoreticular MOF-5 (Fe, Cu, Co, Ni and Zn) by Density Functional Theory
Natarajan Sathiyamoorthy Venkataramanan,Ryoji Sahara,Hiroshi Mizuseki,Yoshiyuki Kawazoe
International Journal of Molecular Sciences , 2009, DOI: 10.3390/ijms10041601
Abstract: Li adsorption on isoreticular MOFs with metal Fe, Cu, Co, Ni and Zn was studied using density function theory. Li functionalization shows a considerable structural change associated with a volume change in isoreticular MOF-5 except for the Zn metal center. Hydrogen binding energies on Li functionalized MOFs are seen to be in the range of 0.2 eV, which is the desired value for an ideal reversible storage system. This study has clearly shown that Li doping is possible only in Zn-based MOF-5, which would be better candidate to reversibly store hydrogen.
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