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Computing power: A deeper law than Moore's? log(ops-per-second) is linear. - http://www.economist.com/blogs/dailychart/2011/10/computing-p...
«That means that for a fixed amount of computational power, the need for battery capacity will fall by half every 1.6 years,” observes Dr Koomey. This trend, he says, “bodes well for the continued explosive growth in mobile computing, sensors and controls.” Some researchers are already building devices that run on “ambient” energy harvested from light, heat, vibration» ‎- 9000