Metrology
Metrology is the science of measurement. Metrology includes all theoretical and practical aspects of measurement. The word comes from Greek μέτρον (metron), "measure" + "λόγος" (logos), amongst others...
Metrology - Wikipedia
Measurement
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Standard (metrology)
In the science of measurement, a standard is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference...
Standard (metrology) - Wikipedia
History of measurement
 This article incorporates public domain material from websites or documents of the National Institute of Standards and Technology.As civilization developed, so too did the need for unit...
History of measurement - Wikipedia
Standards organizations
A standards organization, standards body, standards developing organization (SDO), or standards setting organization (SSO) is any organization whose primary activities are developing, coordinating, pr...
Standards organizations - Wikipedia
Korea Research Institute of Standards and Science
The Korea Research Institute of Standards and Science (KRISS) is the national measurement standards laboratory for the Republic of Korea. It is a government-funded institute responsible for providing ...
Radian
The radian is the standard unit of angular measure, used in many areas of mathematics. An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle, one...
Radian - Wikipedia
Bya
In astronomy, geology, and paleontology, bya or "b.y.a." is an initialism for billion years ago. This abbreviation is commonly used as a unit of time to denote length of time before the present. Speci...
Repeatability
Repeatability or test–retest reliability is the variation in measurements taken by a single person or instrument on the same item and under the same conditions. A less-than-perfect test–retest reliabi...
Measurement
Measurement (from Old French, mesurement) is the assignment of numbers to objects or events. It is a cornerstone of most natural sciences, technology, economics, and quantitative research in other soc...
Measurement - Wikipedia
Optical autocorrelation
In optics, various autocorrelation functions can be experimentally realized. The field autocorrelation may be used to calculate the spectrum of a source of light, while the intensity autocorrelation a...
Optical autocorrelation - Wikipedia
Coordinate-measuring machine
A coordinate measuring machine (CMM) is a device for measuring the physical geometrical characteristics of an object. This machine may be manually controlled by an operator or it may be computer contr...
Coordinate-measuring machine - Wikipedia
Unified Code for Units of Measure
The Unified Code for Units of Measure (the UCUM) is a system of codes for unambiguously representing measurement units to both humans and machines. The code set includes all units defined in ISO 1000...
Mass-to-charge ratio
The mass-to-charge ratio (m/Q) is a physical quantity that is most widely used in the electrodynamics of charged particles, e.g. in electron optics and ion optics. It appears in the scientific fields...
Patrick Kelly (metrologist)
Patrick Kelly LL.D. (1756–1842) was a British metrologist, best known for his comparative studies of weights and measures collected in his works Universal Cambist (1811) and Oriental Metrology (1832)....
Norwegian Metrology Service
Norwegian Metrology Service (Norwegian: Justervesenet) is a Norwegian government agency responsible for metrology. Its main responsibility is to ensure that all measuring equipment in Norway is tr...
Norwegian Metrology Service - Wikipedia
Joint Committee for Guides in Metrology
The Joint Committee for Guides in Metrology (JCGM), is an organization that prepared the "Guide to the expression of uncertainty in measurement" (GUM) and the "International vocabulary of metrology – ...
Pseudoscientific metrology
Some approaches in the branch of historic metrology are highly speculative and can be qualified as pseudoscience.
In 1637 John Greaves, professor of geometry at Gresham College, made his first of ...
Pseudoscientific metrology - Wikipedia
Ronald Edward Zupko
Ronald Edward Zupko (born 5 August 1938) is an authority on historical metrology (the study of the history of weights and measures) with an academic background in medieval history. He is known for his...
Metre
The metre or meter (American spelling), (SI unit symbol: m), is the fundamental unit of length (SI dimension symbol: L) in the International System of Units (SI), which is maintained by the BIPM. Orig...
Metre - Wikipedia
Interferometry
Interferometry is a family of techniques in which waves, usually electromagnetic, are superimposed in order to extract information about the waves. Interferometry is an important investigative techniq...
Interferometry - Wikipedia
Magritek
Magritek is a scientific instrument company based in Wellington, New Zealand, and Aachen, Germany, that was established in 2004 and specialises in compact, portable and benchtop nuclear magnetic reson...
NCSL International
NCSL International (NCSLI) (from the founding name "National Conference of Standards Laboratories") is a global, non-profit organization whose membership is open to any organization with an interest i...
Henri Tresca
Henri Édouard Tresca (October 12, 1814 – June 21, 1885) was a French mechanical engineer, and a professor at the Conservatoire National des Arts et Métiers in Paris.He is the father of the field of pl...
Henri Tresca - Wikipedia
Heterodyne detection
Heterodyne detection is a method of detecting radiation by non-linear mixing with radiation of a reference frequency. It is commonly used in telecommunications and astronomy for detecting and analysin...
Knopflerfish
Knopflerfish is a non-profit organization, developing OSGi related material. The project provides an easy to use open source implementation of the OSGi R4 v4.3 Core Framework and Compendium Specifica...
Knopflerfish - Wikipedia
Planck temperature
Planck temperature, denoted by TP, is the unit of temperature in the system of natural units known as Planck units.It serves as the defining unit of the Planck temperature scale. In this scale the ma...