The need for a smaller, more transportable version of ANSTO's 1,500-liter atmospheric radon-222 monitor, and with a calibration traceable to the International System of Units, prompted the team to ...

In addition to other scientific units, the kilogram also is now defined by a natural constant. This is made possible by single crystals grown from highly enriched silicon-28. In addition to Ampere ...

To do so, the 27th General Conference on Weights and Measures on Friday introduced four new prefixes to the International System of Units, or metric system: ronna (27 zeroes after the first digit ...

Scientists are working hard to meet the deadlines for realizing the ultimate International System of Units. The creation of the decimal metric system during the French Revolution and the ...

for the International System of Units (SI), and are used to make describing quantities more concise. These prefixes range from the smallest, "yocto" (1 quadrillionth), to the largest, "yotta" (1 ...

In 2018, they plan to jettison the Parisian kilogram cylinder, too. In 2018, the seven units in the International System of Units (inner circle) will be defined by seven constants (outer circle).

It marks the first time in more than three decades that new prefixes have been added to the International System of Units (SI), the agreed global standard for the metric system. Joining the ranks ...

It marks the first time in more than three decades that new prefixes have been added to the International System of Units (SI), the agreed global standard for the metric system. Joining the ranks ...

Revamped definitions of scientific units are on their way. In the biggest overhaul of the international system of units (SI) since its inception in 1960, a committee is set to redefine four basic ...