Publication Date:
2004-11-20
Description:
Over the past half-century, there has been a shift away from standards based on particular artifacts toward those based on physical effects, the most stable being based on quantum properties of systems. This change was proposed at the end of the 19th century but is still not complete at the start of the 21st. We discuss how this vision has been implemented through recent advances in science and metrology and how these may soon lead to an SI system finally free from artifact standards, with a consistency based on fundamental constants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flowers, Jeff -- New York, N.Y. -- Science. 2004 Nov 19;306(5700):1324-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK. jeff.flowers@npl.co.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15550660" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
