Word: stiction
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This is known as “stiction,” and prevents the device from working properly...
...certain properties of the two materials and liquid are chosen appropriately, the liquid will insert itself between the two solids, Capasso said, and this could help reduce stiction...
...phenomenal accuracy required miracles of designed precision. The huge aluminum antenna floats, for instance, on a film of oil not much thicker than a human hair, moves on a 30-ton bearing with the ease of a ship's gyro. The oil bearing eliminates what engineers call "stiction," for static friction, enables the antenna to rotate through more than three degrees of arc in less than one second, make a complete 180-degree about-face in less than one minute. With such agility, Haystack can track anything that can be tossed into space, right down to a fast...
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