Redefining the kilogram and other SI units /

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"Version: 20180901"--Title page verso.Includes bibliographical references (page 25).1. Introduction -- 2. Background -- 3. Current directions -- Fundamental constants instead of units -- The Kibble balance -- X-ray crystal density method -- 4. Outlook.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.Final-year undergraduates, new PhD students and early-career scientists.Mode of access: World Wide Web.System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.Dr Stephan Schlamminger is a scientist at the US National Institute of Standards and Technology (NIST). From 2010 to 2017 he led the efforts to measure the Planck constant h. He worked with a team of dedicated scientists and engineers to measure h with a previous version of the Kibble balance. After that, the team built a complete new Kibble balance in four years. In September 2017 he moved to Germany for a year to teach physics at the University of Applied Science in Regensburg (Ostbayerische Technische Hochschule), Germany. Besides working on the Kibble balance, Schlamminger enjoys giving talks on the redefinition of the SI. To some of these presentations, he brings a Kibble balance made from LEGOª bricks.Title from PDF title page (viewed on October 16, 2018).

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Publisher

: .,

Collation

1 online resource (x, 25 pages) :color illustrations.

Language

English

ISBN/ISSN

9780750315395

Classification

530.81

Content Type

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Media Type

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Edition

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Subject(s)

Kilogram.
Metric system.
Units of measurement.
Scientific standards.
TECHNOLOGY & ENGINEERING / Measurement.

Specific Detail Info

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Statement of Responsibility

Stephan Schlamminger.

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