phone
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The issue: Cell phones occasionally fall out of a person’s pockets and get forgotten. This is especially easy to do when sitting on a sofa or in a movie theater seat. If the phone could detect that it had been dropped into sofa cushions, it could notify you before it was too late to find…
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Background: Nearly all modern cell phones have the same touch-screen form factor. Except for a few buttons of low importance (e.g. volume adjustment, power, camera shutter), all interaction is done through the screen itself. The issue: This style of interaction makes use of only one finger, and leaves the remaining four fingers with nothing to…

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