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1 2dF Galaxy Redshift Survey 开放资源 专家推荐
  The 2dF Galaxy Redshift Survey (2dFGRS) is a major spectroscopic survey taking full advantage of the unique capabilities of the 2dF facility built by the Anglo-Australian Observato...
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2 A Brief History of Atomic Clocks at NIST 开放资源 馆员登记
  Part of the About.com site, this timeline describes the development of atomic clocks from 1945 when Isidor Rabi, a physics professor at Columbia University, suggested that such a c...
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3 A carbon nanotube page 开放资源 馆员登记
  Carbon nanotubes are molecular-scale tubes of graphitic carbon with outstanding properties. They are among the stiffest and strongest fibres known, and have remarkable electronic p...
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4 A Compendium of On-Line Soil Survey Information 开放资源 机器抓取
  网站由国际航空宇宙与地球科学研究所(ITC)土壤科学分部的David G. Rossiter副教授编写。网站提供了大量的有关土壤调查科学的活动、研究所、数据库、研究项目及教学材料等方面的网站链接目录,目录按分类组织,包括:土壤调查研究所、土壤调查活动、土壤分类、应用软件和模型、调查方法与科学技术、土壤评价、土壤调查分类、计算机程序、期刊以及图片等方面的网站。...
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5 A Guide to Mineral Legislation and Regulations in Sweden 开放资源 机器抓取
  This guide is an introduction to the Swedish mineral legislation and regulations. It has no legal status. Those who want to know the exact wording of the Acts are referred to the S...
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6 A Level -- Physics -- Current, Charge and Voltage 未开放资源 馆员登记
  Revision resources are provided covering conservation of charge, current electricity, drift velocity, conductors and insulators. Examples are provided, accompanied by videos. For e...
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7 A World of Atoms 开放资源 馆员登记
  Atoms are, we think, the basic building blocks of matter. We know of over a hundred different types of atom - one for each of the elements *.So what are atoms? Do they have anythin...
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8 About.com -- Forestry 开放资源 机器抓取
  The web site is a portal to forestry websites, part of about.com,compiled by About,Inc(devoting to collect web resources,cover more than 50,000 subjects with over 1 million links)....
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9 Accelerators for America′s Future 开放资源 专家推荐
  The Accelerators for Americas Future website grew out of a 2009 symposium, sponsored by the U.S. Department of Energy, on the uses and needs of accelerators for the discovery scien...
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10 AccuWeather.com 开放资源 机器抓取
  AccuWeather.com is the easiest way to get the most customized and accurate weather information for every location on Earth. This site provides accurate weather forecast and weather...
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