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"Rectenna" Converts Wi-Fi to Electricity

发表于 2019-01-31 rectenna converts adchoices

Researchers built a small, flexible device that harvests wi-fi, bluetooth and cellular signals, and turns them into DC electricity. Christopher Intagliata repor…

System Converts Solar Efficiently to Steam

发表于 2014-08-05 efficiently converts steam

A graphite disk resting on carbon foam collects sunlight to heat water directly to steam with 85 percent efficiency. Cynthia Graber reports Learn more about you…

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