The problem of the choice of the basic si units (for discussion)

Yudin, M. F.

doi:10.1007/bf02503935

Cited by 4 publications

(2 citation statements)

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“…The subject of the identity of measurands-a central topic for chemical measurement-is unmentioned. There are well-documented problems, confusions and inconsistencies in the treatment of angular measures and rotationssome of the oldest and most basic measurements known to our species [30][31][32][33][34]. All of these are creating large difficulties for modern technologies.…”

Section: Some Disquiet Concerning the New Simentioning

confidence: 99%

No prospect for change

Price¹

2011

Accred Qual Assur

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A recent discussion by Martin Milton in the November issue of this journal was critical of many published objections to the proposed new International System (SI) measurement units (and in particular the definition of the mole) on the grounds that many objectors had proposed new terms in attempts to clarify thinking and that it is impractical to achieve consensus on such proposals. This discussion in response argues that those criticisms miss the point of the objectors' arguments and are perhaps more appropriately directed at both the current and the new SI itself. A primary example of a neologism in the SI is the term ''amount of substance.'' The many substantive problems with the new SI remain unaddressed by its proponents. Many important consequences of exactly fixing multiple inter-dependent fundamental physical constants as the basis of the world's measurements would appear not to have been considered by the global institutions responsible for the world's measurement units.

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Section: Some Disquiet Concerning the New Simentioning

confidence: 99%

No prospect for change

Price¹

2011

Accred Qual Assur

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“…Plane angle is defined as 'part of a plane limited by two rays emerging from one point', and a simple derivation shows that it has a unit, and thus a dimension [81]. Declaring 'angle' as a base quantity would recognize that it is as physically significant as length, and is not a trigonometric abstraction.…”

Section: Opportunity 10: Redefine the Radian As A Base Unit With Dime...mentioning

confidence: 99%

The next 50 years of the SI: a review of the opportunities for the e-Science age

Foster¹

2010

Metrologia

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The International System of Units (SI) was declared as a practical and evolving system in 1960 and is now 50 years old. A large amount of theoretical and experimental work has been conducted to change the standards for the base units from artefacts to physical constants, to improve their stability and reproducibility. Less attention, however, has been paid to improving the SI definitions, utility and usability, which suffer from contradictions, ambiguities and inconsistencies. While humans can often resolve these issues contextually, computers cannot. As an ever-increasing volume and proportion of data about physical quantities is collected, exchanged, processed and rendered by computers, this paper argues that the SI definitions, symbols and syntax should be made more rigorous, so they can be represented wholly and unambiguously in ontologies, programs, data and text, and so the SI notation can be rendered faithfully in print and on screen.

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A skeptic’s review of the New SI

Price¹

2010

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The problem of the choice of the basic si units (for discussion)

Abstract: The error is indicated in ascribing the units of angular measurement, radians and steradians, to the class of dimensionless physical quantities and the possibility is also demonstrated of including the lumen and the radian as fundamental SI units.

Cited by 4 publications

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No prospect for change

The next 50 years of the SI: a review of the opportunities for the e-Science age

A skeptic’s review of the New SI

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