Word: dissigno
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...heat-transfer equations, Williams tried to determine how much energy it would take to yield a block of ice. "It had been a while since I'd done real math problems. I had to break out the old textbook," says Williams, a product-development consultant with his own firm, Dissigno, in San Francisco. After eons of number crunching, he hit on the right formula and built a prototype. It isn't very efficient; his device uses 35 times as much energy as an electric fridge to make 1 kg of ice. But its simplicity could yield a killer...
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