Saturday, September 21, 2019
Home Tags SI

Tag: SI

metric system

For All Times, For All Peoples: How Replacing the Kilogram Empowers...

Two unusual things happened on Nov. 16, 2018. Fifty-five nations from every continent (except Antarctica) agreed on something, and metrology, the science of measurement,...
Weights and Measures

Historic Vote Ties Kilogram and Other Units to Natural Constants

A convocation of delegates representing 60 countries voted today in Versailles to implement the most significant change to the International System of Units (SI)...
World’s Measurement System

A Turning Point for Humanity: Redefining the World’s Measurement System

After decades of groundbreaking laboratory work, the world’s scientific and technical community is about to redefine four of the seven base units for the...
measurement system

A Turning Point for Humanity: Redefining the World’s Measurement System

This November, in Versailles, France, representatives from 57 countries are expected to make history.  They will vote to dramatically transform the international system that...
Noise Thermometry

NIST ‘Noise Thermometry’ Yields Accurate New Measurements of Boltzmann Constant

By measuring the random jiggling motion of electrons in a resistor, researchers at the National Institute of Standards and Technology (NIST) have contributed to...
soft matter

Tech Researchers Team up for Advanced Materials

Ask Georgia Tech researchers working with advanced materials for examples, and they give a pop culture reference. Two of them even cite the same...
X-ray spectrum

X-rays from Copper Source Set New Gold Standard for Measuring Industrial...

Researchers at the National Institute of Standards and Technology (NIST) have produced and precisely measured a spectrum of X-rays using a new, state-of-the-art machine....
Tiny Forces

Measuring Tiny Forces with Light

Photons are bizarre: They have no mass, but they do have momentum. And that allows researchers to do counterintuitive things with photons, such as...
lattice clocks

Rapid comparison of optical lattice clocks

Swift, ultra-precise measurements of frequency ratios may open new windows on physical world
radioactivity

Characterisation of the IAEA-375 soil reference material for radioactivity measurements

JRC scientists contributed to the upgrading of reference materials owned by the International Atomic Energy Agency (IAEA) by providing activity concentrations of a series...