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1 .This is Scientific American's 60-Second Tech. I'm Larry Greenemeier.Got a minute?
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2 ."I've fallen, and I can't get up!"
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3 .Years ago, the best option for people in this position was to press a button on their monitoring device and call for help.
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4 .But that's not always possible, especially if such a fall renders a person unconscious.
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5 .So electrical engineers at the University of Utah have come up with a fall-detection system that instead relies on wireless sensors placed around a room.
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6 .The sensors emit wireless signals that bounce off of whatever's in the room and create a 3-D map using radio tomographic imaging.
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7 .By setting the sensors at different heights, you can tell when someone is standing, sitting or lying down, and for how long.
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8 .Once the room is mapped, you can program the system to send an alert whenever there's a fall-like movement, or an unusual period of no movement.
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9 .The researchers presented their prototype system at a symposium in London.
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10 .The technology has obvious application as a home monitoring system for the elderly.
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11 .No need for them to wear a button on a string around their neck as a constant reminder that gravity is their enemy.
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12 .Thanks for the minute, for Scientific American's 60-Second Tech. I'm Larry Greenemeier.
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