Word: sustainers
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Dates: during 1970-1979
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...McGovern's America as a land of peace and prosperity where inflation and poverty would end and the environment would be cleansed. You then go on to say that "it is a glowing vision, but is it realistically attainable? And if so, how much would it cost to sustain it?" As a college junior, I think McGovern's vision sounds all right; so if the guy says...
...Western research centers in the race to control thermonuclear fusion, the same energy process that powers the sun. Under Nobel Laureate Nikolai Basov, Lebedev scientists are using high-energy laser beams in an effort to produce a plasma, or ionized gas, of sufficiently high temperature and density to sustain a fusion reaction. Kurchatov researchers are using powerful doughnut-shaped machines, acronymically named Tokamaks, to obtain the same results with intense magnetic fields. Academician Lev Artsimovich, head of the Kurchatov work, doubts that anyone will be able to produce power from fusion in less than 20 or 30 years. "When...
...when-could this extraordinary event have occurred? Using both hard information and informed guesswork, Perrin and his associates evolved an imaginative but logical hypothesis. The scientists knew that the concentration of U-235 found in contemporary uranium deposits is too low to sustain a chain reaction. But they were also aware that radioactive U-235 decays at a known rate, and that 1.7 billion years ago-the approximate age of the Oklo deposit -U-235 made up 3% of raw uranium deposits. This is roughly the same concentration that is created in artificially enriched uranium fuels and thus is enough...
...accessory to the chain reaction. Acting as a "moderator," subsurface water slowed down the neutrons emerging from splitting U-235 atoms enough to allow them to hit and split the nuclei of other U-235 atoms. (Without a moderator, the neutrons escape from the uranium fuel too fast to sustain the reaction.) When the heat from this process became too intense, scientists believe, the water turned to steam, the neutrons speeded up, and the chain reaction halted until the uranium cooled sufficiently for the steam to condense back to water. Thus, Perrin believes, "the fossil pile at Oklo must have...
...glowing vision, but is it realistically attainable? And if so, how much would it cost to sustain it? Most of his life, McGovern has been an influencer, a talker, a thinker. He has the visionary sense, but his campaign thus far reflects his distaste for details, for organization?a quality that has disturbed many American voters, even among his own followers...