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Sensor networks have emerged as a promising tool for monitoring and actuating the devices of physical world. It employs self-organizing networks of battery-powered wireless sensors that can sense, process, and communicate. Such networks can be rapidly deployed at low cost, enabling large-scale, on-demand monitoring and tracking over a wide area. The sensors can be deployed where it is difficult to monitor the environment otherwise. Typical illustrations are natural or man-made crises like severe weather, wild-res, earthquakes, volcanic activities, chemical, biological or nuclear agents, structural and habitat monitoring. In general, the sensors measure physical quantities at different spatial and temporal positions, supporting in-network signal processing and data assimilation. Queried results are next communicated with one or more data sinks.
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