describe mobile devices as "passive sensors that can silently collect, exchange, and process information all day long" [41]. This style of sensing is called 'urban sensing' due to its suitability for large urban areas with high population density, but could be implemented in any environment. ...
laying the foundations for Mark Weiser's concept of ubiquitous computing, which he sees as the "availability of computers throughout the physical environment, virtually, if not effectively, invisible to the user" [42,43]. Cuffet al.describe mobile devices as "passive sensors...
At each height setting, value h was determined as the average of the three transducer readings. www.intechopen.com 366 New Tribological Ways Once the air gap height was established, the supply pressure was corrected using a pressure reducer and a precision gauge in order to keep it constant. ...
Nonmilitary uses of sonar include fish finding, depth sounding, mapping of the sea bottom, Doppler navigation, and acoustic locating for divers. A major step in the development of sonar systems was the invention of the acoustic transducer and the design of efficient acoustic projectors. These ...