Measurement and Control

doi: 10.1177/0020294014558366pmid: N/A

doi: 10.1177/0020294014558365pmid: N/A

doi: 10.1177/0020294014558363pmid: N/A

doi: 10.1177/0020294014555458pmid: N/A

doi: 10.1177/0020294014561941pmid: N/A

doi: 10.1177/0020294014559162pmid: N/A

Machin, Graham

doi: 10.1177/0020294014557406pmid: N/A

Mills, Ian M

doi: 10.1177/0020294014555519pmid: N/A

The proposals approved by the 24th General Conference on Weights and Measures in 2011 for revisions to be made to the International System of Units are reviewed in non-technical terms, appropriate for readers with interests from all fields of science and its applications.

Davidson, Stuart; Robinson, Ian A

doi: 10.1177/0020294014555518pmid: N/A

In the next few years, the world’s measurement system, the SI, will be changing. One of the most significant changes will be the replacement of the existing definition of the kilogram, which depends on the stability of an artefact made in the 19th century, with a definition based on a constant, the Planck constant h, which lies at the heart of modern quantum physics. This change will strengthen, stabilise and reunify the SI and, in addition, provide advantages to science and engineering. This paper describes the reasons for the change, the innovations which have enabled the change to be made and the efforts to ensure that the transition to the new definition is as problem-free as possible.

Janssen, TJBM; Giblin, SP; See, P; Fletcher, JD; Kataoka, M

doi: 10.1177/0020294014561724pmid: N/A

In this short review, we discuss the planned redefinition of the SI unit for electrical current, the ampere. We focus on the work National Physical Laboratory has been doing in this respect to develop a single-electron source capable of realising the new definition with the required precision.