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The revision of the SI—the result of three decades of progress in metrology
2019
Metrologia
On 16 November 2018 a revision of the International System of Units (the SI) was agreed by the General Conference on Weights and Measures. The definitions of the base units were presented in a new format that highlighted the link between each unit and a defined value of an associated constant. The physical concepts underlying the definitions of the kilogram, the ampere, the kelvin and the mole have been changed. The new definition of the kilogram is of particular importance because it
doi:10.1088/1681-7575/ab0013
fatcat:ung5gi22nvfqfpwqbrc2mfjyqm