Title :
The role of fundamental constants in the International System of Units (SI): present and future
Author :
Taylor, Barry N. ; Mohr, Peter J.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
4/1/2001 12:00:00 AM
Abstract :
This paper addresses the role of fundamental constants in (1) the current definitions of the SI base units; (2) practical representations of SI electric units and the consistency of those representations with the SI as deduced from the 1998 CODATA recommended values of the constants; and (3) redefinition of the kilogram and the impact on realizations of SI electric units of a newly proposed definition that fixes the value of the Planck constant h
Keywords :
constants; units (measurement); CODATA; International System of Units; Planck constant; SI units; base units; electric units; fundamental constants; kilogram; Current; Frequency; Hall effect; Josephson effect; Kelvin; Measurement units; Stationary state; Temperature; Thermodynamics; Time measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
