Word: barriers
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Dates: during 1950-1959
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...theory that led to the experiment goes back to 1953, when British Cosmologist Thomas Gold suggested that the initial pulse from the sun might be a shock wave analogous to the shock wave produced in air by a plane breaking through the sound barrier. Professor Gold knew that gas in interplanetary space is too thin to carry ordinary shock waves, which propagate by gas molecules bumping against each other. But solar shock waves, he argued, are different. They are caused by solar magnetic fields expanding suddenly into space and pushing ionized gas ahead of them. "It is a bit like...
There was no such animal-human barrier in the work of team members headed by Dr. Leon Hellman. They were dealing with the breakdown products of natural human hormones as they go through the metabolic cycle. From the breakdown of testosterone and related hormones the researchers found two potent derivatives: androsterone and etiocholanolone, with properties different from those of their parent substances. Example: androsterone lowers the level of circulating cholesterol (though testosterone may raise it), may thus be useful in combating atherosclerosis and reducing the danger of heart attacks and many strokes; etiocholanolone triggers a rise in body temperature...
Tutor-student contact in Dudley was called "almost non-existent, otherwise amicable," and "no worse than the other Houses." But other commuters have gotten to know the tutors, and their reaction was "improving," "gaining," even "excellent." Most, however, found the same barrier that exists in many of the residential Houses: "Staff sits together at lunch, and it is difficult to approach them without a sense of intrusion...
Interspersing action with writing, he worked on the first volume about the Atlantic, while assistants covered the fighting at Kwajalein and Eniwetok. Returning to the Pacific to observe the "breaking of the Bismarcks barrier," he sent an assistant to the Mediterranean to report on the landing at Anzio. Still in the spring of '44, Morison took part in the Saipan and Guam landings, as an assistant was on hand for D-Day. Another assistant observed the action in Leyte Gulf...
...salmon as they head for Alaska spawning grounds, trap tens of millions before they can reproduce. Up to 20% of Bristol Bay red salmon runs in 1957 bore the telltale scars of long, fine-meshed Japanese gill nets, which can be strung to form a solid, ten-mile barrier across the ocean. By using these nets, say U.S. fishermen, the Japanese kill many immature, Alaska-born salmon and violate the intent of a 1953 treaty designed to prevent the Japanese from fishing for native Alaska salmon...