Word: fractionalism
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...matter where the experts may eventually fix the dose of radiation that can be considered safe, Commander Dobbins was sure that atomic sub crews-within a few yards of the reactor for 24 hours a day-so far have been exposed to only a fraction of permissible totals. When industry goes into full-scale production and operation of reactors for civilian power needs, it will have an invaluable body of data collected from the first men to go under the sea in atomic vessels...
...monkey deifiers. plus a dark fear that other countries really use the monkeys for rocket and radiation research. Whatever the reason, by last week the market was effectively killed. Unable to find enough six-pounders, hundreds of trappers went out of business in India, cut off all but a fraction of the monkey supply. And while U.S. drug houses have passed the peak of polio vaccine demand, the Indian ruling was a disaster to Britain, which is still forced to limit its small vaccine supply to children under...
SINS & SAC. The navigation problems were just as baffling. To aim any missile with accuracy, a missileer must know his own geographic position within a fraction of a mile. Land-based missile crews can set their guidance systems for the target on the basis of their known position. But how, traveling hundreds of feet below the sea, could the Navy subs fix position accurately? An error of a few hundred yards at launching point could mean a wide miss of the target 1,500 miles away. Advances in celestial navigation and radio astronomy systems helped, but the big answer came...
...traveling 23,000 ft. per sec. (15,600 m.p.h.), an error of I ft. per sec. in its top speed will make it miss its target by 500 yds. So when the desired speed has been reached, the thrust must be cut off accurately in a small fraction of a second. This is not too difficult with liquid-fuel rockets, whose thrust can be cut by shutting off the fuel. Solid-fuel rockets cannot be controlled in this simple way, but other effective ways have been developed. One of them is to blow off part of the nozzle...
...converter is made of two plates of tungsten that are a fraction of a millimeter apart. Between them is a vapor in near vacuum. The plates are so treated that they have different electric potentials. (G.E. will disclose neither the vapor nor the method of treating the plates.) The plate with the higher potential is heated to about 1,500° centigrade, the other to around 1,000° centigrade. The first plate is hot enough to release electrons; the second is not. Clouds of electrons boil off the hotter plate (the cathode) and are attracted to the cooler plate...