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Redefining the kilogram and other SI units

Author: Stephan Schlamminger; Institute of Physics (Great Britain),
Publisher: Bristol [England] (Temple Circus, Temple Way, Bristol BS1 6HG, UK) : IOP Publishing, [2018]
Series: Physics world discovery.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
Units are at the heart of science and technology. Most measurements require units to express their result. The International System of Units (SI) provides a widely used coherent framework of units. While the present SI is fit for purpose for all measurements, it has several shortcomings. Most notably, the kilogram is defined via an artifact that limits its realization to a specific place and certain times. To solve  Read more...
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Genre/Form: Electronic books
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Stephan Schlamminger; Institute of Physics (Great Britain),
ISBN: 9780750315395 0750315393
OCLC Number: 1057327899
Notes: "Version: 20180901"--Title page verso.
Title from PDF title page (viewed on October 16, 2018).
Target Audience: Final-year undergraduates, new PhD students and early-career scientists.
Description: 1 online resource (1 PDF (x, 25 pages)) : color illustrations
Details: Mode of access: World Wide Web.; System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.
Contents: 1. Introduction --
2. Background --
3. Current directions --
Fundamental constants instead of units --
The Kibble balance --
X-ray crystal density method --
4. Outlook.
Series Title: Physics world discovery.
Responsibility: Stephan Schlamminger.

Abstract:

Units are at the heart of science and technology. Most measurements require units to express their result. The International System of Units (SI) provides a widely used coherent framework of units. While the present SI is fit for purpose for all measurements, it has several shortcomings. Most notably, the kilogram is defined via an artifact that limits its realization to a specific place and certain times. To solve this problem and to take advantage of advances in quantum metrology made in the last 50 years, a revision of the SI is planned. This revision will modify the foundation of the SI from base units to fundamental constants of nature. While the revision presents a huge shift in philosophy, the size of the units will not change, and hence the revision will go mostly unnoticed.

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