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Arumugam S.S.,Sri Lakshmi Ammal Engineering College | Palanisamy V.,Information Institute of Engineering
Journal of Theoretical and Applied Information Technology | Year: 2013

Pattern mining increases extra awareness due to its practical relevance in many fields, such as, biology, medicine and so on. Recently, a few researches have been presented in the literature about the mining of privacy preserving patterns. There are more number of data mining techniques developed to find out important information, yet the way of mining the data from the database is not concerned about the privacy. In this paper, we have selected the medical database and created the privacy on the patient's medical database while the hospitals share their data to other organizations. In case of sharing the medical data, preserving the privacy of the data is also of importance as it may lead to violation of individual (patient) highly personal information. Based on the organizational need, the hospital can make the privacy on particular datum alone, say on type diseases. In that respective way, a choice is given to the hospital to where to make the privacy and this may vary depending on the organization. Here, we have made the privacy on four different types of diseases grouped as sensitive diseases, frequent diseases, seasonal diseases and geographical diseases. Privacy of the patient records are obtained by modifying the original database. Here, Prefix span algorithm was used for mining important diseases from the database. The result of mining was not worthy comparing the result with the original medical database. Finally the experimentation was made with the synthetic dataset and an analyzes on the difference among the four types of diseases while make the privacy in terms of the execution time, memory usage, was done. © 2005 - 2013 JATIT & LLS. All rights reserved. Source

Perumal Sankar S.,Cape Institute of Technology | Hariharan N.,Sri Krishna College of Engineering And Technology | Varatharajan R.,Sri Lakshmi Ammal Engineering College
Wireless Personal Communications | Year: 2016

In optical communication systems, the fibre cable plays a vital role in carrying the optical signals from one equipment to another equipment. Active light systems may employ single mode and multimode fibres for the transmission of optical signals. An inherent disadvantage highly noticeable in either case is the underutilization of optical fibre cables in terms of power transmission while coupling with the source. The efficiency of coupling between semiconductor lasers and single mode optical fibres can be greatly increased by a micro lens of an appropriate focal length being fabricated at the front-end of the up tapered fibre. This proposed structure is realised by the simulation work, and it shows the effect of input power coupling efficiency from source to wave guide, measured by optical field propagation. Ordinary fiber, up-tapered fiber and this proposed Microlens integrated up-tapered fiber were taken for our analysis and this proposed work exhibit better coupling efficiency than the previous structures. This work focuses and investigates the feasibility of integrating an optic micro lens, compatible with the size of the up- tapered optic fibre to increase the coupling efficiency. © 2015, Springer Science+Business Media New York. Source

Anita C.S.,RMD Engineering College | Suresh R.M.,Sri Lakshmi Ammal Engineering College
Wireless Personal Communications | Year: 2016

The multi-channel and multi-interface wireless mesh networks (WMNs) allow multiple orthogonal channels simultaneously to facilitate increased broadband connectivity to the end-users. Many efforts have been devoted to allocate the channels to the interfaces in a multi-channel multi-interface setting. Recently, the hybrid channel allocation mechanism jointly optimizes the routing and channel assignment, by utilizing the queuing traffic. It is essential to map the optimization of traffic distribution on each channel along with channel switching in such an order that it adapts to the changing traffic. However, the contention in medium access and channel switching delay are the key issues in a multi-channel hidden terminal problem. The proposed optimized stable path- channel allocation and routing (OSCAR) protocol is a hybrid multi-channel protocol that reduces the communication delay without degrading the network performance. The proposed work, OSCAR determines a highly stable path that increases mesh routers to improve the routing efficiency. The channel allocation mechanism mainly promotes queue dynamics based probabilistic channel selection (QDPCS), and backoff countdown optimization (BCO). An essential component of the QDPCS scheme is the factor of queuing utilization, and this strategy selects a least congested channel. The BCO mechanism creates the logical order among contending nodes based on the remaining backoff value. It reduces the medium access delay and enables the feasibility of scheduled transmissions without degrading the network throughput. Finally, the performance evaluation results show that the OSCAR protocol outperforms the existing protocol over WMNs. © 2016 Springer Science+Business Media New York Source

Shobana F.J.J.,Sri Lakshmi Ammal Engineering College | Narayanasamy R.,Thangavelu Engineering College
Eurasip Journal on Wireless Communications and Networking | Year: 2014

Wireless sensor networks face many threats which drain the energy. The performance of sensor network routing is much affected in the presence of selfish nodes with messages being delivered with a longer delay. Social network routing is a method in which the messages are selectively forwarded through the nodes where the encounters between these nodes are more likely to occur. Network reputations clearly speak about the quality of nodes involved in data forwarding. The idea is to utilise social network reputations of source or destinations for effective data forwarding in farmland sensor networks. © 2014, Shobana and Narayanasamy; licensee Springer. Source

Sakthi S.,Jeppiaar Engineering College | Purushothaman D.,Sri Lakshmi Ammal Engineering College
Proceedings - NCET NRES EM 2014: 2nd IEEE National Conference on Emerging Trends in New and Renewable Energy Sources and Energy Management | Year: 2015

This paper focuses on the design of single input single output fuzzy controller for a Power oscillation controller based SSSC for damping rotor oscillation in power system network. The oscillation due to disturbance cannot damp out only by SSSC, but with single input Fuzzy tuned Damping controller based SSSC can easily damp out the oscillation. Here the proposed system has been implemented in the standard nine-bus system and simulation results are taken by deriving the transient stability algorithm using C compiler software. After the analysis it is found that the Fuzzy based POD controller is very much required for SSSC controller to damp out the power oscillations. © 2014 IEEE. Source

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