News tagged with metrologia

How the kilogram has put on weight

Using a state-of-the-art Theta-probe XPS machine experts at Newcastle University, UK, have shown the original kilogram is likely to be tens of micrograms heavier than it was when the first standard was set in 1875. And they ...

dateJan 06, 2013 in General Physics
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Redefining the kilogram

New research, published by the National Physical Laboratory (NPL), takes a significant step towards changing the international definition of the kilogram – which is currently based on a lump of platinum-iridium kept ...

dateFeb 20, 2012 in General Physics
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Redefining the SI base units

(PhysOrg.com) -- Metrology is poised to undergo a profound change that will benefit scientists, engineers, industry and commerce – but which almost no one will notice in daily life.

dateNov 03, 2011 in General Physics
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NIST atomic fountain clock gets much better with time

The world's best clock, NIST-F1, has been improved over the past few years and now measures time and frequency more than twice as accurately as it did in 1999 when first used as a national standard, physicists ...

dateSep 23, 2005 in
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