Word: flicker
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...streetlamps flicker on in front of Leningrad's palatial city hall and a blanket of luminescent mist settles over the gilded dome of St. Isaac's Cathedral, just across the square. Night and fog come early now to the far northern city, built on islands in the Neva River. But the workday is far from over for Leningrad Mayor Anatoli Sobchak. In his elegant second-floor office, once used by the Czars, he reflects on the problems of this metropolis of 5 million, famed as the cradle of the 1917 Bolshevik Revolution. "I feel as if I am wrapped...
...chomped off the lower part of officer David Storton's right ear? Was it Shawn Blick or Jonathan Blick? One flicker of doubt and both Blick brothers -- who happen to be identical twins -- could...
...military precedents flicker almost subliminally through the mind when Americans imagine war with Iraq: the conflict might look like the Six-Day War. Or it might look like Vietnam...
Active-optics mirrors can refocus in seconds, but the atmosphere's turbulence can make a star seem to flicker hundreds of times a second. Compensating for the flicker calls for a still experimental system called adaptive optics. Different versions of the equipment are being developed at the University of Hawaii and Johns Hopkins University, as well as in Europe...
...reference star within the telescope's field of view and looks for the shimmering caused by currents in the atmosphere. When the sensor detects disturbances, it sends signals to electrodes flanking the plastic mirror. The electrodes create electric fields that make the plastic bulge or dip, canceling out the flicker. Both the Hawaii and Johns Hopkins teams expect to test their mirrors early in 1991. If they work, the adaptive-optics systems could be used on virtually any existing telescope...