Latest papers

The metrology of time.

The fundamental constants and theory.

The determination of best values of the fundamental physical constants.

The quantum electrical triangle.

Possible new definitions of the kilogram.

Newton's constant and the twenty-first century laboratory.

Varying constants.

Base units of the SI, fundamental constants and modern quantum physics.

The development of modern metrology and its role today.

Introduction: the fundamental constants of physics, precision measurements and the base units of the SI.

Journal adopts use of conventional and Si units.

Electronic products; performance standard for diagnostic x-ray systems and their major components. Final rule.

“Globesity” and units of measurements

Radiation quantities and units--understanding the sievert.

Comments on the paper entitled Concentration dependency of the BAC/BrAC (blood alcohol concentration/breath alcohol concentration) conversion factor during the linear elimination phase by H.-T. Haffner et al.

Development of automatic systems for the ionising radiation metrology at the ENEA-IRP secondary standard laboratory.

[Clinical Testing of New Tonometers on the Basis of the International Standard for Human eye Tonometers ISO 8612].

Units in radiation medicine.

A guide to SI units in radiation protection.

A proposed reference method for plasminogen activators that enables calculation of enzyme activities in SI units.