Word: sensors
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Dates: during 1980-1989
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...William Garman, 51, contracted Lou Gehrig's disease in 1982 and within two years was paralyzed, unable to speak or write. Then, last summer, a group of Westinghouse engineers outfitted Garman with an infrared sensor that moves a computer screen's cursor in response to his blinking. For the first time since his illness struck, Garman has been able to communicate with family and friends. His first words, painstakingly spelled out one letter at a time...
...firing of the computer-controlled rocket that was programmed to decelerate the spacecraft from its orbital speed for the descent into the atmosphere. Accounts of what happened next differ, but indications are that as the ship passed through a twilight region of space between day and night, an infrared sensor, which fixes the spacecraft's position in relation to earth, was confused by rays of sunlight. The unexpected signal caused the computer to abort the normal firing...
...caused last week's problem. Said Joseph Lombardo, who oversees the shuttle's main-engine project at Marshall Space Flight Center in Alabama: "We don't know whether it was a faulty indication or really a malfunction in the valve." At week's end NASA officials suspected that a sensor had been affected by excessive engine cooling during the countdown. They planned to replace the valve and the sensor monitoring it. This week the agency was to schedule another test firing...
Harris said the computer "did not see that the engine bleed valve had fully closed." He said engineers were trying to determine if there was a faulty valve or if the sensor had given an incorrect reading...
Opponents of changing the treaty interpretation argue that even the broad reading would not permit the testing of smart rocks in space, because they do not represent new or exotic physical principles. With the exception of a long- wavelength infrared sensor, the SBKKVs involve no technical breakthroughs, says John Pike of the Federation of American Scientists, and the land-based interceptors are merely upgraded, nonnuclear versions of the ABM systems developed during the 1960s. Says Democratic Senator J. Bennett Johnston of Louisiana: "The Delta 180 test demonstrated obsolete technology that is ineffective and vastly expensive...