This is interesting idea... ubiquitous nature of cellphones making researchers at Purdue University to think of nationwide network of cellphones to act as intelligence system to report unexpected radiation in crowded areas such trains, theatres, etc. A sensor in cellphone will detect the radiation along with location information obtained from GPS, will be reported to security officials using cellular network over Internet. Looking at radiation report and location information, officials can take action quickly! Good stuff!!
Check out details at here.
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