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Excerpt from The International System of Units (Si)The International System of Units, universally abbreviated SI (from the French Le Systeme International d' Unite's), is the modern metric system of measurement. Long the dominant system used in science, the SI is rapidly becoming the dominant measurement system used in international commerce. In recognition of this fact and the increasing global nature of the marketplace, the Omnibus Trade and...

Excerpt from The International System of Units (Si)The International System of Units, universally abbreviated SI (from the French Le Systeme International d' Unite's), is the modern metric system of measurement. Long the dominant system used in science, the SI is rapidly becoming the dominant measurement system used in international commerce. In recognition of this fact and the increasing global nature of the marketplace, the Omnibus Trade and...

Excerpt from Recommended Values of the Fundamental Physical Constants: A Status Report, September-October, 1990Faraday Constant There have been no new results for the Faraday constant since the 1986 adjustment and to the best of our knowledge, no experiments are underway. Data item 4 is the nbs (now nist) result included in the 1986 adjust ment reexpressed in units of c90=a90 s. This was accomplished using the value nil/a for the drift rate of...

Excerpt from Guidelines for Evaluating and Expressing the Uncertainty of Nist Measurement ResultsAlthough the vast majority of nist measurement results are accompanied by quantitative statements of uncertainty, there has never been a uniform approach at nist to the expression of uncertainty. The use of a single approach within the Institute rather than many different approaches would ensure the consistency of our outputs, thereby simplifying t...

Excerpt from Guidelines for Evaluating and Expressing the Uncertainty of Nist Measurement ResultsAlthough the vast majority of nist measurement results are accompanied by quantitative statements of uncertainty, there has never been a uniform approach at nist to the expression of uncertainty. The use of a single approach within the Institute rather than many different approaches would ensure the consistency of our outputs, thereby simplifying t...

Excerpt from Recommended Values of the Fundamental Physical Constants: A Status Report, September-October, 1990 Faraday Constant There have been no new results for the Faraday constant since the 1986 adjustment and to the best of our knowledge, no experiments are underway. Data item 4 is the nbs (now nist) result included in the 1986 adjust ment reexpressed in units of c90=a90 s. This was accomplished using the value nil/a for the drift rate ...