Word: factor
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Dates: during 1940-1949
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...researchers conclude that in the case of the five paralyzed children the tonsil operation was "the precipitating factor," warn doctors and parents that tonsil operations are dangerous during the poliomyelitis season (summer and fall), even though the disease "is not notably prevalent in a community." Probable connection between tonsillectomies and poliomyelitis: nerves injured by surgery are more susceptible to polio infection, so that the latent virus could travel readily from the injured throat nerves to the medulla oblongata, where the spinal cord enters the brain...
...greatest factor behind the proposal was the Council's belief that the applications which were flooding into the Dean's Office were all justified, since most of the students were actually pressed by work, or were hindered by their physical condition from partaking in the full four periods now required...
...reason: if ten bombers are over a target defended by 100 guns, the ratio is 10 guns per plane. If 100 bombers are over the target the ratio is one gun per plane. Damage to anti-aircraft equipment by bombs and blast interference with radio equipment is also a factor. R.A.F. losses through 1941 averaged 10% per raid, on a long series of small raids. The Cologne, Essen, Bremen mass raids, involving between 400 and 1,000 planes, reduced the loss factor to an average of 4% per raid...
Cumulative effect. Since every plant destroyed places an increasingly heavy strain on the remaining plants and interrupts their flow of materials, the cumulative effect is an important factor. This in turn is stepped up by systematic destruction of key plants-power plants, blast furnaces, etc.-on which others depend...
...Another factor in favor of the Russians is the approaching winter which is just as severe around Stalingrad as it is in the Moscow region, although delayed for two or three weeks. According to Karpovich, however, the Germans have about two months of fair weather upon which they may count...