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Singh R.,Baba Banda Singh Bahadur Engineering College BBSBEC | Singh H.,Broadcast Engineering Society | Kaler R.S.,Thapar University
ACE 2010 - 2010 International Conference on Advances in Computer Engineering | Year: 2010

In wireless sensor networks, the value of transmission range has a direct impact on energy utilization. A sensor node makes use of the maximum transmission power and transmission range to send packets in a network which results in wastage of energy, since maximum transmission range is mostly longer than the distance between node and its extreme neighbor due to node distribution. In this paper, we present an adaptive energy saving and reliable routing protocol (AESRR) for wireless sensor networks. In AESRR, sensor node reduces its maximum transmission range in order to reach the extreme neighbor for saving energy before sending the first packet. The route discovery process of AESRR is on-demand. In the route discovery process, a combined link weight is determined based on the parameters transmission success ratio and node's residual energy. The best route is selected based on this link weight value. The sensor node must readjust the transmission range when remaining energy reaches bellow a threshold link weight value. Our proposed protocol saves energy, and prolongs the lifetime of node while enhancing the reliability. By simulation results, we demonstrate that AESRR has better delivery ratio and less energy consumption and delay. © 2010 IEEE. Source


Panwar R.S.,Thapar University | Kumar S.,Thapar University | Pandey R.,Baba Banda Singh Bahadur Engineering College BBSBEC | Pandey O.P.,Thapar University
Tribology Letters | Year: 2014

In the present work, a detailed study of ceramic reinforcement of different size ranges in the matrix of LM13 alloy on the friction and wear behavior has been carried out. For this purpose, LM13/Zr composite containing 10 wt% zircon sand particles of different size ranges using stir casting process has been developed. Zircon sand particles were incorporated in two ways: firstly as single size reinforcement and secondly dual size reinforcement. Durability of the composites was tested by finding the wear rate of the composite against the steel disk by pin-on-disk method. Addition of zircon sand particles in the LM13 alloy improves the hardness of the composite as well as wear resistance. Wear rate of the developed composites was tested under different test conditions by varying the applied load and ambient temperatures. Wear rate of the composite changes significantly at different ambient temperatures. SEM analysis of the worn surfaces was done to know the operative wear mechanism. © Springer Science+Business Media New York 2014. Source

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