St Josephs Institute Of Technology

Chennai, India

St Josephs Institute Of Technology

Chennai, India
Time filter
Source Type

Mohan P.,Karpagam College of Engineering | Chelliah S.,St Josephs Institute Of Technology
International Journal of Information Security and Privacy | Year: 2017

Objective: The main aim is to de-duplicate the redundant files in the cloud and also to improve the security of files in public cloud service by assigning privileges to the documents when it is uploaded by confidential user. Methods: To achieve the objective the authors have used the AES algorithm to encrypt the file stored after de-duplication in the cloud. De-duplication is done based on comparison of contents, file type and size. For an authorized user to access the file from the cloud, generation of OTP using SSL protocol is adopted. Findings: Files uploaded in the cloud are encrypted using traditional encryption algorithms which don't provide high levels of security. Files can be accessed by anyone who is authorized. Privileges are not considered. During de-duplication, only the name and size of the files are considered. Application: Files within the public cloud can't be viewed by everyone who has registered with the cloud. Those who have the respective privileges can only view the file. Proof of Ownership is assured. Since de-duplication is done based on the content redundancy within the cloud storage is avoided. Usage of OTP ensures that the content is viewed by the individuals who have the respective privileges related to the file. These concepts provide additional security to the files stored in the public environment. © 2017, IGI Global.

Kamalakkannan S.,Sathyabama University | Kirubakaran D.,St Josephs Institute Of Technology
Journal of Computational and Theoretical Nanoscience | Year: 2017

In this work, a grid system attached Z-Source inverters for PV system with perturb and observation algorithm is projected for changing irradiance and to use full obtainable PV power. The boost operation of PV power is attained in inverter using the perception of shoot-through time period. The PV inverter is an important component in a PV system. It executes the conversion of variable DC output of the PV panel module(s) in to pure sinusoidal 50Hz AC current. This pure sinusoidal AC in turn is fed to the grid connected system. The simulation is carried out in Matlab/Simulink platform and benefits of projected systems are emphasised with the aid of simulation results. © 2017 American Scientific Publishers.

Brindha G.,St. Joseph's College | Rohini G.,St Josephs Institute Of Technology
Journal of Computational and Theoretical Nanoscience | Year: 2017

Nowadays, Digital Microfluidic Biochips (DMFB) is becoming popular in many areas and leads to analysis the application with high throughput. The Microfluidics (MF) is a major part in constructing the advance technology of Biochip. It is based on the MF to perform the operations of chip which leads to manipulate the process and manage the control of droplets. The enhanced development of biochip offers better performances in sensitivity and less cost because of system integration and the volumes of reagent and sample. The proposed design of the biochip is addressing the issues and synthesis the biochip with the minimization of an area and configuration of the pin. It avoids the cross defect and reduces the count of a pin. The analysis of algorithms and technique used for configuration and area minimization shows the performances better than the existing in utilization of power, time, delay and area. © Copyright 2017 American Scientific Publishers All rights reserved.

Jacob J.T.,Satyabhama University | Kirubakaran D.,St Josephs Institute Of Technology
2016 IEEE Uttar Pradesh Section International Conference on Electrical, Computer and Electronics Engineering, UPCON 2016 | Year: 2017

Hybrid and Modular Multilevel converters are becoming an alternative to the conventional drive topology in industrial sector due to its reliability in operation, quality of output power, fault tolerant capability and flexibility in enhancement. However, the advancements of multilevel topologies in portable, isolated power supply electric system is immature due to the restriction of independent power sources. This paper proposes a multilevel power conversion concept employing a Modified Active Neutral Point Clamped Converter (MANPCC). The proposed system is designed for isolated power supply medium power electric drives where the number of DC power sources are restricted, i.e., for electric vehicles, portable cranes etc. The proposed topology has been analyzed, verified with Matlab/Simulink software and realized with a hardware prototype. MANPCC can generate voltage levels with low switching frequency and with reduced dv/dt. Inherent capacitor voltage balancing ability is another notable feature of the proposed system. A Phase Shift Carrier Based pulse width modulation strategy is used for implementing the topology. © 2016 IEEE.

Arikumar K.S.,St Josephs Institute Of Technology | Natarajan V.,Anna University
2016 8th International Conference on Advanced Computing, ICoAC 2016 | Year: 2017

In recent times the incorporation of Wireless Sensor Network (WSN) with Internet of Things (IoT) has become more conscientious for the researchers. The collection of enormous amount of homogenous sensor nodes forms the Wireless Sensor Network. These sensor nodes have restricted battery power and memory and so the limited amount of energy is considered as the major issue. To overcome this issue several mechanisms were proposed, among them clustering is a popular way which minimizes the consumption of energy in the sensor nodes and thus the life span of the Wireless Sensor Network can be increased. Grouping the sensor nodes in an energy efficient and distributed approach is considered as the important issue in clustering. Hotspots problem and energy hole problem are the problems faced by the non-distributed clustering. So in order to triumph over these issues, a Fuzzy Based Dynamic Clustering (FDC) in Wireless Sensor Network is proposed. Also a new fitness function for Particle Swarm Optimization (PSO) is proposed which discovers the possible cluster heads The hotspots problem and energy hole problem is overcome by the Fuzzy Inference System (FIS) which chooses unique radius for each cluster head thus unequal clustering is formed. A fair comparison is done between this proposed algorithm and some existing algorithms. The simulation results obtained reveals that our proposed algorithm increases the lifetime and has better energy efficiency. © 2017 IEEE.

Padmamalini N.,St Josephs Institute Of Technology | Ambujam K.,Dr Ambedkar Government Arts College
Materials Science in Semiconductor Processing | Year: 2016

Nanocrystalline ZrO2-V2O5-TiO2 composite was synthesized by co-precipitation method and calcined at 500 and 700 °C. The formation of the composite material has been confirmed by X-ray diffraction analysis. The surface morphology was determined by SEM and HRTEM and it was seen that increase in calcination temperature increases the grain size. EDX analysis confirms the presence of zirconium, titanium and vanadium in the lattice. Optical absorption studies reveal a very low absorption in the visible region for both the samples. The dielectric constant, loss and ac conductivity of the pelletized samples have been examined at different temperatures as functions of frequency and the activation energies were calculated. The results indicated that the dielectric constant increases with calcination temperature. It was seen that the dielectric constant increases on the addition of Vanadia to zirconia-titania composite making it ideal for use as a gate dielectric material. © 2015 Elsevier Ltd. All rights reserved.

Chella Thevar G.K.,St Josephs Institute Of Technology | Rohini G.,St Josephs Institute Of Technology
Wireless Networks | Year: 2016

In wireless sensor networks, a sensor node communicates with a small set of neighbour sensor nodes and with the base station through a group leader or a cluster head. However, in some occasions, a sensor node required to move in the sensor networks. The node has to change its own position with the requirement of applications. Considering this phenomena, in this paper, we propose to design an angular function and private key management system authenticated by group leader for the transmission of a node. In the proposed scheme, the group is divided into sectors. The motion of the node is related with the angles to the group leader, which is the basis of our proposal. The nodes movement and activity should be tracked. The proposed scheme attains high connectivity and security with the help of the directional transreceiver. The lifetime of a node is increased, and it enables a node to move through the network and to transmit data to its neighbors. © 2016 Springer Science+Business Media New York

Baskaran M.,St Josephs Institute Of Technology | Prabakaran R.,St Josephs Institute Of Technology
Proceedings of the 2016 IEEE International Conference on Wireless Communications, Signal Processing and Networking, WiSPNET 2016 | Year: 2016

An optical microwave and millimeter-wave generation in a fiber optic communication link by heterodyning the output modes based on Stimulated Brillouin Scattering (SBS). The link resides of a 1552.52 nm DFB Laser diode, Mach Zehnder modulator (MZM), 40 Km single mode fiber and Optical receiver. The receiver has a high power optical pump source, a data recovery unit and a Bandpass filter. Finally, we build a Radio over Fiber system through simulation, and the transmission performance of the generated optical MMW signal is presented. © 2016 IEEE.

Dafni Rose J.,St Josephs Institute Of Technology
International Journal of Applied Engineering Research | Year: 2015

Text Clustering is an unsupervised method that is used to group similar text documents. In text clustering, the documents are first pre-processed, and features are extracted using various techniques. The retrieved features will then be clustered. There are various methods that are available for both feature extraction and text clustering. Usually, in the clustering process, the key terms are extracted in the form of words or phrases. In this work, first the features are extracted in the form of sentences using various formulae. Then, the sentences are weighed and a certain ratio of sentences with the highest weight-age is extracted from each document. Then the summarized sentences are clustered semantically using the WordNet. Wordnet is an online dictionary, and using that, the semantics between the sentences are found. Furthermore, based on the similarity between the sentences, the documents are clustered. Semantics is an important factor that must be considered in the clustering process and in this the work semantic relationship between sentences is taken into consideration. The results are tested using Reuters-21578 dataset. © 2015 Research India Publications.

Moorthy R.S.,St Josephs Institute Of Technology
International Journal of Applied Engineering Research | Year: 2015

Cloud Computing offers all services in on demand manner and attracts the user with the slogan pay per use. It is also used for massive storage of data, as well as to perform intensive applications. Resource Management in the cloud computing is the most important challenging issue. Resource management includes optimal resource discovery and allocation. Optimal resource discovery decrease job rejection ratio. The efficient resource allocation mechanism increases the consumer satisfaction and also minimizes penalty cost. Hence, in this paper we have proposed Similarity based resource discovery, and Hybrid Swarm based Resource allocation mechanism (H-PSO) to optimally discover and allocate the resources for processing user applications. The proposed S2RM (Similarity and Swarm based resource Management) is integrated with scheduler. The proposed H-PSO based resource allocation is compared with existing random allocation in terms of user satisfaction, response time, request cost and penalty cost. The simulation is carried out in Eclipse IDE with Java programming environment. The simulation results show that the proposed S2RM is efficient than existing random allocation. © 2015 Research India Publications.

Loading St Josephs Institute Of Technology collaborators
Loading St Josephs Institute Of Technology collaborators