A Wireless Sensor Network (WSN) consists of spatially distributed
autonomous devices (sensor nodes) to cooperatively monitor physical or
environmental conditions such as temperature, sound, vibration,
pressure, motion or pollutants, at different locations.This book focuses
on some important issues of WSNs like coverage, connectivity, and
energy-effieciency, but, primarily, different strategies for the
deployment of sensor nodes have been considered so as to maintain
optimal levels of coverage.