Word: explains
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Dates: during 1990-1999
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...ailment, whose effects range from soreness and discomfort during extensive manual activity to permanent musculoskeletal damage to the hands, is difficult to explain. Ostensible caused include typing too much in uncomfortable positions, especially without taking breaks. Because of the role of Keyboarding in RSI, computer-science students run the highest risk. Yet for some reason, the lack of ergonomic keyboard equipment does not seem like a satisfying explanation for what has escalated from an annoyance into a bona fide plague. Why have so many students been struck by RSI? After thinking about it for quite some time, I realized that...
These subsurface waves explain more than the origin and propagation of El Ninos. They also explain how El Ninos end. When the waves first hit the South American coast, some reflect back, like sound bouncing off a wall. When the reflected waves reach Asia, they rebound again. But this double bounce inverts their effect: instead of depressing the thermocline, these twice-reflected waves now lift it up. Cool water dilutes the warmer liquid at the surface, causing a temperature drop in the eastern Pacific known, aptly enough, as La Nina. Thus, observes Ants Leetmaa, director of the National Climate Prediction...
Such a current, Philander thinks, could explain the unusual spate of El Ninos that marked the first part of this decade. Think of the cycle as one of the strings on the climate's violin, he suggests. "When something changes the tension on the string, the frequency of the vibration also changes...
External forces may also help explain why El Nino has a different impact on the weather from one cycle to the next. Recently, for example, Ed Cook of Lamont-Doherty and Julie Cole of the University of Colorado used tree rings from hundreds of sites to see how El Nino affected North America in the past. Before 1920, they found, El Nino appears to have affected a much larger region of the U.S. than it does today, channeling winter rain and snow all the way up into the Great Lakes and Great Plains. Afterward, however, its sphere of influence retreated...
...writing in response to Marian Schlesinger's letter (Feb. 2) concerning the proposed Center for Government and International Studies, and to explain why the Faculty of Arts and Sciences regards this project, and its proposed location, as vital to the education of our students and to the scholarly work of the faculty. Some of these issues were very helpfully addressed in The Crimson's recent editorial on this subject...