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Sensor networks have been proposed for various applications due its ability for monitoring and detecting a possible hazardous event in underground mines such as fire, flammable, explosive, toxic gas; where judicious deployment of fixed anchors (node with known positions) is to be considered. In emergencies wireless communication may become vital for survival, for example, during a disaster such as a fire, rock falls, the conventional wired communication system may become unreliable, necessitating a wireless radio system. A wireless sensor network is composed of sensors which are deployed across a geographical area. Each sensor can be thought of as having two important modules. The first is the sensing module depending on the mission at hand (i.e., seismic, chemical, temperature, etc.).
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