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Darpa Has Seen the Future of Computing  And ItÂs Analog
BY ROBERT MCMILLAN 08.22.12
By definition, a computer is a machine that processes and stores data as ones and zeroes. But the U.S. Department of Defense wants to tear up that definition and start from scratch.
Through its Defense Advanced Research Projects Agency (Darpa), the DoD is funding a new program called UPSIDE, short for Unconventional Processing of Signals for Intelligent Data Exploitation. Basically, the program will investigate a brand-new way of doing computing without the digital processors that have come to define computing as we know it.
The aim is to build computer chips that are a whole lot more power-efficient than todayÂs processors  even if they make mistakes every now and then.
The way Darpa sees it, todayÂs computers  especially those used by mobile spy cameras in drones and helicopters that have to do a lot of image processing  are starting to hit a dead end. The problem isnÂt processing. ItÂs power, says Daniel Hammerstrom, the Darpa program manager behind UPSIDE. And itÂs been brewing for more than a decade.
ÂOne of the things thatÂs happened in the last 10 to 15 years is that power-scaling has stopped, he says. MooreÂs law  the maxim that processing power will double every 18 months or so  continues, but battery lives just havenÂt kept up. ÂThe efficiency of computation is not increasing very rapidly, he says.
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