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Wireless sensor network are the networks which consists of hundreds to thousands of sensor nodes gathering various data including temperature, sound, location,etc. They have been applied to various fields such as healthcare, monitoring system, military, and so forth. Normally its very difficult to recharge or replace the sensor nodes which have limited battery capacity. Energy efficiency is thus a primary issue in maintaining the network. This paper proposes an efficient cluster head selectiondoi:10.1155/2012/304329 fatcat:5uoifeefyjgark5i73qbur4uqe