The same material that makes the theft detectors go off in a department store when the salesperson forgets to remove the anti-theft tag, may make inexpensive, passive temperature and stress sensors for highways, concrete buildings and other applications possible, according to Penn State researchers.
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Penn State. "Passive Sensors Remotely Monitor Temperature And Stress." ScienceDaily. ScienceDaily, 2 July 2002. <www.sciencedaily.com/releases/2002/06/020627005122.htm>.
Penn State. (2002, July 2). Passive Sensors Remotely Monitor Temperature And Stress. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2002/06/020627005122.htm
Penn State. "Passive Sensors Remotely Monitor Temperature And Stress." ScienceDaily. www.sciencedaily.com/releases/2002/06/020627005122.htm (accessed April 18, 2014).