The cladistic revolution–can it make the grade?
نویسندگان
چکیده
منابع مشابه
Alternative tests make the grade.
Toxicity testing is absolutely necessary for assessing the safety of substances in food, air, and water, in the workplace and at home. Although there are several tried-and-true toxicity assays, the search is always on for methods that can even better predict toxic effects. As scientific understanding of the effects of environmental toxicants grows, new tests are needed to evaluate previously un...
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Future linear colliders will require high levels of performance from their electron sources. A group at SLAC has recently tested a structure that substantially exceeds current collider polarized electron source pulse-profile requirements. Published in CERN Courier 42 (September 2002), p 19. Work supported by Department of Energy contract DE–AC03–76SF00515.
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We propose a live demonstration of MinervaLight, a P2P Web search engine. MinervaLight combines the (previously separate) focused crawler BINGO! (to harvest Web data), the local search engine TopX, and our P2P Web search system MINERVA under one common user interface. The crawler unattendedly downloads and indexes Web data, where the scope of the focused crawl can be tailored to the thematic in...
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Publishing graded readers is big business, but there is evidence that the texts themselves are not being read in sufficient quantity to improve language proficiency. This article reports on a study of graded readers, focusing on interviews with some major publishers of graded readers, to investigate their production rationales. The findings suggest that the opinions of the ultimate consumers, t...
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ژورنال
عنوان ژورنال: Nature
سال: 1978
ISSN: 0028-0836,1476-4687
DOI: 10.1038/276759a0