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Modern life-style of human-being necessitates the use of Wireless Personal Area Networks (WPANs) consisting of ad-hoc communications between portable computing devices such as laptops, PDAs, pagers and cellular telephones. The newly emerged wireless technologies, including IEEE 802.11, promise to outfit conventional portable and embedded devices with high bandwidth as well as localized wireless communication...
Wireless sensor networks are becoming increasingly popular due to their numerous applications and advances in microelectronics. One basic application is the surveillance or monitoring of large areas. Assuming n sensor nodes are randomly deployed and each sensor can cover a circular area of a certain radius r, a central question is what fraction the total area of interest can be expected to be covered...
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