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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.

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

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.

Karunakaran P.,Bharath University | Sundarajan M.,Sri Lakshmi Ammal Engineering College
International Journal of Pharmacy and Technology | Year: 2016

Carry Select Adder (CSLA) is one of the fastest adders used in many data processing processors to perform fast arithmetic functions. This work uses a simple and efficient gate level modification to significantly reduce the area and power of the CSLA. The modified design has reduced area and power as compared with multiternary digit (trit) adder design. The adder is based on an efficient single-trit full-adder design with low-complexity encoder and reduced complexity carry generation unit. Further,we optimize the number of encoder and decoder blocks required while putting together several single-trit full-adder units to realize a multitrit adder. Extensive HSPICE simulation results show roughly 79% reduction in power-delay product for three-trit adders and 88% reduction in power-delay product for nine-trit adders in comparison to a direct realization. © 2016,International Journal of Pharmacy and Technology. All rights reserved.

Kanniga E.,Bharath University | Sundararajan M.,Sri Lakshmi Ammal engineering college
Advanced Materials Research | Year: 2013

The circuit has combination of high speed and low switching losses. The need for detecting the current zero crossing is eliminated by applying a specific switch activation schedule for each combination of the current and Voltage signs of the main taps. The new method reduces the electrical stress in the Switches and the electromagnetic emission [ref1]. © (2013) Trans Tech Publications, Switzerland.

Tresa L.E.,Sathyabama University | Sundararajan M.,Sri Lakshmi Ammal Engineering College
2014 International Conference on Circuits, Power and Computing Technologies, ICCPCT 2014 | Year: 2014

Video compression is reducing and removing redundant video data so that a digital video file can be effectively sent and stored. The compression process is used to create a compressed file for transmission or storage by applying an algorithm. To play the compressed file, an inverse algorithm is applied to produce a video that shows virtually the same content as the original source video. In this paper, different wavelets like Haar, Daubechies, Biorthogonal, Symlet were used to perform video compression for the given video input. These wavelets were compared with different input video formats like MPEG, AVI, and WMV formats and the output was observed using the parameters Peak Signal to Noise ratio, Retained Energy and Compression Ratio in MATLAB. © 2014 IEEE.

Selvi K.,Sathyabama University | Suresh R.M.,Sri Lakshmi Ammal Engineering College
Journal of Computational and Theoretical Nanoscience | Year: 2016

In many applications, continuous use of multiple queries have become the focal point of many research papers. Assessment of various document-clustering methods reveals the need for effective methodology to capture the actual requirement of the user from the web browsers. However, it requires the definition of a similarity measure, which is an important generic problem in machine learning. A hybrid intelligent similarity measure with the combination of neural network algorithm has been proposed in this paper, which gives better results than the existing methods. Experiments show that application of Radial basis function to the training data set gives better clustering of text documents avoiding retrieval of irrelevant documents. © 2016 American Scientific Publishers All rights reserved.

Muralibabu K.,Vellore Institute of Technology | Sundhararajan M.,Sri Lakshmi Ammal Engineering College
WIT Transactions on Engineering Sciences | Year: 2014

In wireless communication, Orthogonal Frequency Division Multiplexing (OFDM) plays a significant role against the multipath fading channel. But, OFDM system suffers from the problem of Peak-to-Average Power Ratio (PAPR) in multicarrier transmission, which leads to inefficiency in the transmitter side power. By taking this issue into account, a novel method for reducing PAPR in OFDM system using Discrete Cosine Transform and adjacent subcarrier grouping based companding technique has been introduced. The matlab simulation results shows that our approach yields better results in PAPR reduction when compared to the existing systems. © 2014 WIT Press.

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.

Muralibabu K.,Vellore Institute of Technology | Sundhararajan M.,Sri Lakshmi Ammal Engineering College
Applied Mechanics and Materials | Year: 2014

In wireless communication, Orthogonal Frequency Division Multiplexing (OFDM) is a promising scheme against the multipath fading channel.However, due multi-carrier transmission, OFDM system has a major draw back of Peak-to-Average Power Ratio (PAPR) problem that affect the efficiency of HPA in the transmitter side. In the proposed scheme, a new technique is discussed for reducing PAPR in the OFDM system by using Discrete Cosine Transform (DCT) and adjacent sub carriers grouping with companding technique.A computer simulation is used to evaluate the performance of the proposed PAPR scheme. © (2014) Trans Tech Publications, Switzerland.

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