Units of measure Units of measure The ampere-turn (AT) is the MKS unit of magnetomotive force, represented by a direct current of one ampere flowing in a single-turn loop in a vacuum. An Ampere-turn is equal to 4 pi/10 Gilberts, the equivalent CGS unit. ...more on Wikipedia about "Ampere-turn"
Ancient Persian weights and measures are one of many systems of measurement based on the Mesopotamian system first incorporated by the kings of Susa and Elam and later used by the kings of Persia. ...more on Wikipedia about "Ancient Persian units of measurement"
Approximate conversion between English and metric units often needs to be done without calculator or computer. This article is an informal listing of some quick and dirty conversions between the Imperial system, the U.S. customary system and the SI. When people say "a foot long" or "ten kilometers from here", they rarely mean ".3048 m" or "6.21571 miles". ...more on Wikipedia about "Approximate conversion between English and metric units"
Barrels of oil equivalent (BOE) is a unit of measure used by oil and gas companies in their financial statements as a way of combining oil and natural gas reserves and production into a single measure. ...more on Wikipedia about "Barrels of oil equivalent"
A Barrer is a non- SI unit of gas permeability (specifically, oxygen permeability) used in the contact lens industry. It is a bulk property. ...more on Wikipedia about "Barrer"
In telecommunications and computing, bit rate (sometimes written bitrate or Rbit) is the frequency at which bits are passing a given (physical or metaphorical) "point". It is quantified using hertz, the SI unit of frequency, or the bit per second (bit/s) unit. ...more on Wikipedia about "Bit rate"
In telecommunication, a call-second is a unit used to measure communications traffic. ...more on Wikipedia about "Call-second"
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The cent is a logarithmic unit of measure used for musical intervals. Typically cents are used to measure extremely small intervals, or to compare the sizes of comparable intervals in different tuning systems, and in fact the interval of one cent is much too small to be heard between successive notes. ...more on Wikipedia about "Cent (music)"
Cetane number or CN is to diesel fuel what octane rating is to gasoline. It is a measure of the fuel's combustion quality. ...more on Wikipedia about "Cetane number"
:Cir is the standard astronomical abbreviation for the constellation Circinus ...more on Wikipedia about "CIR"
This article lists conversion factors between a number of units of measurement. ...more on Wikipedia about "Conversion of units"
The daraf is the unit of electrical elastance (symbol: F-1), the ability of an electric potential to charge a capacitor; it is the reciprocal of the farad. Proposed by Arthur Edwin Kennelly in 1936 as a backwards spelling of farad, the daraf is not a recognized SI unit. ...more on Wikipedia about "Daraf"
Darcy is a unit of permeability. It is not an SI unit, but it is widely used in petroleum engineering and geology. The darcy has units of area. ...more on Wikipedia about "Darcy"
dBm is an abbreviation for the power ratio in decibel (dB) of the measured power referenced to one milliwatt (mW). The "m" stands for "milliwatt". ...more on Wikipedia about "DBm" This article is made on http://www.shortopedia.com
dBW is an abbreviation for the strength of a signal expressed in decibels relative to one Watt. ...more on Wikipedia about "DBW"
The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. While originally only used for power and intensity ratios, it has come to be used more generally in engineering. The decibel is widely used as a measure of the loudness of sound. It is a " dimensionless unit" like percent. Decibels are useful because they allow even very large or small ratios to be represented with a conveniently small number. This is achieved by using a logarithm. ...more on Wikipedia about "Decibel"
Defects per million opportunites constitutes a standard of measure that correlates failures of expected norms in any process. One failure per every million normative outcomes constitutes 1 DPMO. ...more on Wikipedia about "Defects per million opportunities"
Degrees of General Hardness (dGH) is a unit of water hardness, specifically of General Hardness. ...more on Wikipedia about "DGH"
Dimensional analysis is a conceptual tool often applied in physics, chemistry, and engineering to understand physical situations involving a mix of different kinds of physical quantities. It is routinely used by physical scientists and engineers to check the plausibility of derived equations. Only like dimensioned quantities may be added, subtracted, compared, or equated. When unlike dimensioned quantities appear opposite of the "+" or "−" or "=" sign, that physical equation is not plausible, which might prompt one to correct errors before proceeding to use it. When like dimensioned quantities or unlike dimensioned quantities are multiplied or divided, their dimensions are likewise multiplied or divided. When dimensioned quantities are raised to a power or a power root, the same is done to the dimensions attached to those quantities. ...more on Wikipedia about "Dimensional analysis"
A dioptre, or diopter, is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres (i.e. 1/metres). For example, a 3 dioptre lens brings parallel rays of light to focus at 1/3 metre. As a measurement of the degree to which light is converged or diverged, lenses with various dioptric values are used during an eye examination to improve focus and determine the refractive error of the eye. Convex lenses have positive dioptric value and generally correct hyperopia (farsightedness) while concave lenses have negative dioptric value and generally correct myopia (nearsightedness). Typical over the counter reading glasses will be rated at +1.00 to +3.00 dioptres. ...more on Wikipedia about "Dioptre"
Dobson units (DU) are the standard way to express ozone amounts in the atmosphere. One DU is 2.7 × 1016 ozone molecules per square centimetre, or 2.7 × 1020/m². One Dobson unit refers to a layer of ozone that would be 10 micrometre thick under standard temperature and pressure. For example, 300 Dobson units of ozone brought down to the surface of the Earth at 0 degrees celsius would occupy a layer only 3 mm thick. ...more on Wikipedia about "Dobson unit"
The eotvos is a unit of acceleration divided by distance in the older Centimeter-gram-second system of units. The eotvos is defined as 1/1,000,000,000 galileo per centimetre. The symbol of the eotvos unit is E. ...more on Wikipedia about "Eotvos (unit)"
The dimensionless unit named the erlang is a statistical measure of telecommunications traffic used in telephony. It is named after the Danish telephone engineer A. K. Erlang, the originator of traffic engineering and queueing theory. ...more on Wikipedia about "Erlang unit"
In radio astronomy, the unit flik was coined by a group at Lockheed in Palo Alto, CA as a substitute for the SI derived unit W cm-2 sr -1 um-1, or Watts divided by centimeters squared, steradians squared, and micrometers. ...more on Wikipedia about "Flik"
In computing, FLOPS is an abbreviation of Floating point Operations Per Second. This is used as a measure of a computer's performance, especially in fields of scientific calculations that make heavy use of floating point calculations. ...more on Wikipedia about "FLOPS"
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