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Posted by Linda H on 5:20:00 AM
The average auto refractor--that clunky-looking device eye doctors use to pinpoint your prescription--weighs about 40 pounds, costs $10,000, and is virtually impossible to find in a rural village in the developing world. As a result, some half a billion people are living with vision problems, which make it tough to read and work.
Ramesh Raskar knew fixing this problem would be tricky. It required a new way of thinking about eye tests--and a new kind of device, one powerful enough to support high-resolution visuals, cheap enough to scale, and simple enough to be used by just about anyone. The MIT professor briefly toyed with stand-alone options, which were complicated and costly. Then he reached into his pocket and pulled out an unexpected savior: his iPhone.
"The displays had gotten so good, thanks to people wanting to watch episodes of Lost in high definition," Raskar recalls. "I was immediately energized."
Posted by Linda H on 5:15:00 AM
WASHINGTON — Energy experts believe that seaweed holds enormous potential as a biofuel alternative to coal and oil, and US-based scientists say they have unlocked the secret of turning its sugar into energy.
A newly engineered microbe can do the work by metabolizing all of the major sugars in brown seaweed, potentially making it a cost-competitive alternative to petroleum fuel, said the report in the US journal Science.
The team at the Berkeley, California-based Bio Architecture Lab engineered a form of E. coli bacteria that can digest the seaweed's sugars into ethanol, it said. Unlike other microbes before, researchers found it can attack the primary sugar constituent in seaweed, known as alginate.