Informatics Publishing Limited

R. K. Sowmiya ¹, A. Vijaya ²

Affiliations
1 Shri Nehru Maha Vidayalaya College of Arts & Science, Coimbatore, IN
2 Bharathiar University, IN

Abstract

In the primordial years we use LAN cable for transferring data from one source to another source. But we are unable to connect more then one system. Later on that we had HUB for connecting more then one system, But HUB is a collusion domain many data’s will gets lost due to that. After that we had MAC (Medium Access Control) protocol which is more comfortable when compare to HUB. The most widely used technology for medium access in wireless local area networks, multihop mesh and ad-hoc networks are the IEEE 802.11 standard MAC protocol. Some key challenges that 802.11 protocols solves are collision and hidden terminal and the PHY layer design in 802.11n has the provision to improve the performance in multipath fading scenarios using multiple input multiple output. In this IEEE 802.11 MAC protocol we can communicate only as unicast, by implementing the SMAC (Selected Medium Access Control) Protocol we try to develop the Multicast communication. In SMAC we have the power saving, various frequencies range to communicate. This paper is a comparative study of the MAC protocols and trying to implement the unicast to multicast communication.

Keywords

Wireless Networks, Ad Hoc Networks, Energy Efficiency, Power Management.

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A. Vijaya ¹, P. Selvi ²

Affiliations
1 Department of Computer Science in Sri Krishna Arts and Science College, Coimbatore, IN
2 Sri Krishna Arts and Science College, Coimbatore, IN

Abstract

Cloud computing, the new trend for service infrastructures requires user multi-tenancy as well as minimal capital expenditure. In a cloud that services large amounts of data that are massively collected and queried, such as scientific data, users typically pay for query services. The cloud supports caching of data in order to provide quality query services. User payments cover query execution costs and maintenance of cloud infrastructure, and incur cloud profit. The challenge resides in providing efficient and resource-economic query services while maintaining a profitable cloud. In this work we propose an economic model for self-tuned cloud caching targeting the service of scientific data. The proposed economy is adapted to policies that encourage high-quality individual and overall query services but also brace the profit of the cloud. We propose a cost model that takes into account all possible query and infrastructure expenditure. The experimental study proves that the proposed solution is viable for a variety of workloads and data.

Keywords

Go Grid, Optimal Pricing, Optimization, Query Execution.

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A. Vijaya ¹, S. Koteswara Rao ¹, A. Jawahar ¹, Sk. B. Karishma ²

Affiliations
1 Department of Electronics and Communication Engineering, KL University, Vaddeswaram, Guntur - 522502, Andhra Pradesh, IN
2 Department of Electronics and Communication Engineering, KL University, Vaddeswaram, Guntur - 522502, Andhra Pradesh

Abstract

Background/Objectives: This paper presents parameterized Modified Gain Bearings Only Extended Kalman Filter to track a torpedo using bearings-only measurements. Methods/Statistical Analysis: The parameterization is included to obtain fast convergence in estimated torpedo motion parameters. Findings: Observer uses estimated target kinematics to determine proper observer manuever calculates. Monte-Carlo simulation is carried out and the results are presented. Application/Improvements: It is noted that parameterization reduces the time of convergence and the results are satisfactory.

Keywords

Kalman Filter, Sonar, Torpedo

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J. Sudha ¹, S. Sampathkumar ¹, A. Vijaya ¹

Affiliations
1 Dept. of Production Technology, MIT, Anna University, Chennai, IN

Abstract

The present study aims to apply AE in the drilling of GFRP laminates and understand the different events that occur from the time the drill come in contact with the surface to the time when the process is complete for various spindle speeds. Experiments were carried out under varying speeds on random fiber GFRP. The results clearly indicate that AE parameters as well as AE waveform can be used to identify the optimum cutting condition on drilling random oriented glass fiber reinforced composite laminate and also can be used for monitoring the drilling process.

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