Word: signalizes
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Dates: during 1950-1959
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...newly evolved society, we may presume that the channel used will be one that places a minimum burden of frequency and angular discrimination on the detector . . . The wide radio band from, say 1 mc to 10,000 mc, remains as the rational choice. For indisputable identification as artificial, one signal might contain, for example, a sequence of small prime numbers of pulses, or simple arithmetical sums...
From the earth's surface, space has long seemed hardly more than an emptiness between the earth and the stars. But space probers have found that it has a geography as complex as the maze of pipes and conduits under a downtown city street. Last week the Army Signal Research and Development Laboratory at Fort Monmouth, N.J. reported the discovery of a new and unsuspected duct of ionized particles that leads magnetic waves around the earth...
...scientists followed the waves halfway round the earth and then lost track of them. But since the Argus tests, the Fort Monmouth team has noticed other waves that travel in the same high duct of plasma, apparently started by electrified particles slamming in from the sun. The Signal Corps is continuing to study its newfound duct. But when its scientists are asked whether they hope to find practical uses in communication, their military chaperons stop the conversation...
Lunik's course and timing were chosen, the Russians said, so that on the far side it would come close to a line drawn between the moon and the sun. As it approached the line, an electronic signal from the earth started its automatic machinery-and all sorts of things began to happen. Lunik was spinning (for directional stability) with one of its ends pointing roughly toward the sun; the first thing the orienting mechanism did was to stop the spinning, probably by ejecting small spurts of gas through nozzles. Then optical viewing devices looking through ports...
Automatic Developer. On signal from the earth, both cameras began taking pictures on 35-mm. film that had been carefully protected from the fogging effect of cosmic rays. Exposures were automatically varied from frame to frame to make sure of some negatives with good contrast. As soon as the film was shot, it passed into a developing and fixing device that was specially designed to function properly under conditions of weightlessness. After being dried, the film went into a case to wait for transmission to earth. Some of this operation was automatic, but marks on the moving film, the Russians...