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Sony says develops cost-efficient solar cells
Research ) said on Sunday it has developed dye-sensitized solar cells with an energy conversion efficiency of 10 percent, a level seen necessary for commercial use.
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Merger revs up revenue at Nashville Superspeedway
Nashville Superspeedway . The Lebanon speedway, rolling into the start of its 2008 season, expects more big-name drivers, which will draw more spectators and beef up the bottom line. "There a...