Word: signalling
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Dates: during 1990-1999
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...crew alive during those final moments? Did the pilots manage to briefly pull the plane out of its dive, or was the aircraft reflexively entering a climb as the near-supersonic dive increased the lift of its wings? And why were the pilots unable to send out a distress signal...
...disappointed that the U.S. Senate rejected the Comprehensive Nuclear Test Ban Treaty [NATION, Oct. 25]. Now that the Senate has sent rogue countries a signal that the world's leading nation doesn't mind if they test a nuke or two, the world of the 21st century is sure to be full of nations with nuclear arms. Is that what America wants? I have always looked up to the U.S. because it demonstrates the meaning of democracy, justice, equality and vision. Pax Americana is welcome because the U.S. has been reliable. But recently the U.S. hasn't been leading other...
Whether growing nerves will reconnect properly--ensuring that a signal sent to a leg doesn't wind up at an arm--has always been a cause for concern. But there may be little reason to worry. Researchers now believe that advancing nerve endings carry chemical markers that guide them straight to receptors at their destination. "It's as if the body wants to be whole," says Reeve...
...time is 6 a.m.," the little box chirps. Angela stares at its smooth, blue face long enough for the embedded microlaser to scan the back of her eye. "Ocular pressure, blood pressure and carbon-dioxide levels normal," the alarm clock reports. "But you are dehydrated. I'll signal the refrigerator to fix you an electrolyte cocktail...
Researchers are learning more every day about how the body processes fat. One clue involves the hormone leptin, which is pumped out by fat cells and signals lab mice, at least, not to eat. Unfortunately, as reported last week in the Journal of the American Medical Association, it doesn't seem to work in humans. Researchers are still trying to figure out why not--and how to get around the problem. Another natural substance, called pro-opiomelanocortin (POMC), seems to signal that it's time to stop eating. Mice treated with POMC boosters shed 40% of their excess body weight...