The International System of Units (SI), 9th edition¶
Bureau International des Poids et Mesures. (2019). The International System of Units (SI), 9th edition: Defining constants.
Cited by¶
6 citations across 6 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Ground Truth
- Fact-checking and journalism: source documents, official records, and primary witnesses are the ground truth against which claims are checked, structurally identical to ML evaluation. Forensics and audit: chain-of-custody-secured evidence or the unredacted original is the ground truth against which testimony and copies are checked. Navigation and metrology: surveyed monuments and physical standards — kilogram artifacts, atomic-clock references — are the ground truth at which calibration chains terminate.
This sourceDefines the SI base units via fixed fundamental constants (e.g., the kilogram via the Planck constant) — the primary standards at which metrological calibration chains terminate.
- Fact-checking and journalism: source documents, official records, and primary witnesses are the ground truth against which claims are checked, structurally identical to ML evaluation. Forensics and audit: chain-of-custody-secured evidence or the unredacted original is the ground truth against which testimony and copies are checked. Navigation and metrology: surveyed monuments and physical standards — kilogram artifacts, atomic-clock references — are the ground truth at which calibration chains terminate.
- Reference Standard Decay
- In metrology, primary standards drift as physical realizations are redefined — the 2019 SI redefinition is the canonical case.
This sourceDocuments the 2019 redefinition fixing the Planck constant and retiring the International Prototype of the Kilogram, re-grounding the kilogram on an invariant of nature.
- In metrology, primary standards drift as physical realizations are redefined — the 2019 SI redefinition is the canonical case.
- Standardization
- In measurement, the establishment of the metric system and the SI units is standardization in its purest civic form: nations and trades converged on common units of length, mass, and time so that a measurement made by one party means the same to another — a convergence achieved partly de jure (treaty, the General Conference on Weights and Measures) and partly by the network effect of mutual intelligibility.
This sourceDocuments the treaty-based (Metre Convention, CGPM) convergence of nations on common units of measurement.
- In measurement, the establishment of the metric system and the SI units is standardization in its purest civic form: nations and trades converged on common units of length, mass, and time so that a measurement made by one party means the same to another — a convergence achieved partly de jure (treaty, the General Conference on Weights and Measures) and partly by the network effect of mutual intelligibility.
Domain-specific¶
Verification¶
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Links previously used in the corpus¶
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Registry ID ref:dcc9ed644165 · see in the full table