This paper gives the 2002 self-consistent set of values of the basic constants and conversion
factors of physics and chemistry recommended by the Committee on Data for Science and …

Since 1889 the international prototype of the kilogram has served as the definition of the unit
of mass in the International System of Units (SI). It is the last material artefact to define a …

Abstract The International System of Units (SI) is founded on seven base units, the metre,
kilogram, second, ampere, kelvin, mole and candela corresponding to the seven base …

The kilogram, the base unit of mass in the International System of Units (SI), is defined as the
mass of the international prototype of the kilogram. Clearly, this definition has the effect of …

The measurement of the Planck constant, h, is entering a new phase. The CODATA 2010
recommended value is 6.626 069 57× 10− 34 J s, but it has been a long road, and the trip is …

Over the last 30 years, metrology laboratories have used the quantum behavior of the
Josephson effect to greatly improve voltage metrology. The following article reviews the …

Over the past 40 years, a number of discoveries in quantum physics have completely
transformed our vision of fundamental metrology. This revolution starts with the frequency …

The present definition of the unit of mass in the International System (SI) is based on the
international prototype of the kilogram, an artefact dating back to the 1880s. At present there …

A total of 96 absolute gravity (AG) measurements at the Membach station and 221 at the
Proudman Oceanographic Laboratory (POL) is analyzed for noise content. The lengths of …

The kilogram is the last unit of the international system of units (SI) still based on a material
artefact, the international prototype of the kilogram (IPK). The comparisons made in the last …