ScienceDaily (Dec. 1, 2010) — The prevalence of global positioning system (GPS) devices in everything from cars to cell phones has almost made getting lost a thing of the past. But what do you do when your GPS isn't working? Researchers from North Carolina State University and Carnegie Mellon University (CMU) have developed a shoe-embedded radar system that may help you find your way.
http://www.sciencedaily.com/releases/2010/12/101201102557.htm