By Dr Ian F. Akyildiz, Mehmet Can Vuran(auth.), Ian F. Akyildiz(eds.)
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5 Two-tier architecture of Great Duck Island habitat monitoring network [38]. of seabirds on Great Duck Island (GDI), Maine. , petrels. More specifically, the occupancy of the burrows during 1–3 days is monitored as well as the environmental changes during the breeding season and the corresponding changes in bird behavior. 5. In the first tier, groups of sensors are used to gather information. For this tier, Mica motes equipped with Mica Weather Boards are used, which include temperature, photoresistor, barometric pressure, humidity, and thermopile sensors.
Since the water meter sensor is already calibrated by the utility company, this node serves as a ground truth for the rest of the system. The second type of component is the vibration sensors, which are installed in each pipe to monitor vibrations. The distributed vibration information is then sent to the central computation node, which automatically calibrates the sensors and determines the water usage associated with each pipe. Calibration is performed through an online optimization algorithm, which is based on the fact that the sum of the water flows at each non-calibrated sensor should be equal to that of the water meter, which is known to be accurate.
The rapid deployment, self-organization, and fault tolerance characteristics of sensor networks make them a very promising sensing technique for military C4ISRT. Since sensor networks are based on the dense deployment of disposable and low-cost sensor nodes, destruction of some nodes by hostile action does not affect a military operation as much as the destruction of a traditional sensor, which makes the sensor network concept a better approach for battlefields. Some of the military applications of sensor networks are monitoring friendly forces, equipment, and ammunition; battlefield surveillance; reconnaissance of opposing forces and terrain; targeting; battle damage assessment; and nuclear, biological, and chemical (NBC) attack detection and reconnaissance [5, 9, 15, 29, 37].