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RF is an abbreviation for
radio frequency Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the upp ...
. Rf or RF may also mean:


Arts and entertainment

* ''
Red Faction (series) ''Red Faction'' is a series of shooter video games developed by Volition and owned by Koch Media. Originating in 2001, the ''Red Faction'' games have spanned Microsoft Windows, macOS and consoles, including the PlayStation 2, GameCube, Xbox ...
'', a series of revolution video games *
Rinforzando A variety of musical terms are likely to be encountered in printed scores, music reviews, and program notes. Most of the terms are Italian, in accordance with the Italian origins of many European musical conventions. Sometimes, the special mus ...
, , in music notation * '' RF Online'', an online RPG made by CCR


Businesses

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Aero K Aero K Airlines Co., Ltd. () is a low cost airline based in South Korea. It was founded in 2017 and received its first aircraft in 2021. The name is derived from spelling "Korea" backwards. History Aero K was founded in 2017 originally named ...
, IATA code (2020—present) *
Florida West International Airways Florida West International Airways, Inc. (often abbreviated as ''FWIA'') was an American cargo airline based at Miami, Florida. It operated scheduled and charter services worldwide, with its main markets in Latin America, the Caribbean and the Uni ...
, IATA code (1984—2017) *
Regions Financial Corporation Regions Financial Corporation is a bank holding company headquartered in the Regions Center in Birmingham, Alabama. The company provides retail banking and commercial banking, trust, stockbrokerage, and mortgage services. Its banking subsidia ...
, NYSE stock symbol


Government and military

*
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
(''République française'') *
Russian Federation Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
*
Rhodesian Front The Rhodesian Front was a right-wing conservative political party in Southern Rhodesia, subsequently known as Rhodesia. It was the last ruling party of Southern Rhodesia prior to that country's unilateral declaration of independence, and the rul ...
, former political party in Rhodesia


Biology and medicine

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Rheumatic fever Rheumatic fever (RF) is an inflammatory disease that can involve the heart, joints, skin, and brain. The disease typically develops two to four weeks after a streptococcal throat infection. Signs and symptoms include fever, multiple painful jo ...
, an inflammatory disease *
Release factor A release factor is a protein that allows for the termination of translation by recognizing the termination codon or stop codon in an mRNA sequence. They are named so because they release new peptides from the ribosome. Background During t ...
s RF1, RF2, RF3, proteins *
Reticular formation The reticular formation is a set of interconnected nuclei that are located throughout the brainstem. It is not anatomically well defined, because it includes neurons located in different parts of the brain. The neurons of the reticular formation ...
, in the brainstem * Rheumatoid factor, an antibody *
Receptive field The receptive field, or sensory space, is a delimited medium where some physiological stimuli can evoke a sensory neuronal response in specific organisms. Complexity of the receptive field ranges from the unidimensional chemical structure of od ...
, the response characteristic of a neuron *
Respiratory failure Respiratory failure results from inadequate gas exchange by the respiratory system, meaning that the arterial oxygen, carbon dioxide, or both cannot be kept at normal levels. A drop in the oxygen carried in the blood is known as hypoxemia; a rise ...
*
Risk factor In epidemiology, a risk factor or determinant is a variable associated with an increased risk of disease or infection. Due to a lack of harmonization across disciplines, determinant, in its more widely accepted scientific meaning, is often use ...


Other uses in science and technology

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Representative fraction Spatial scale is a specific application of the term scale for describing or categorizing (e.g. into orders of magnitude) the size of a space (hence ''spatial''), or the extent of it at which a phenomenon or process occurs. For instance, in phy ...
*
Retardation factor In chromatography, the retardation factor (''R'') is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor ''R''F is defined as the ratio of the distance traveled b ...
in a chromatographic system *
Radiative forcing Radiative forcing (or climate forcing) is the change in energy flux in the atmosphere caused by natural or anthropogenic factors of climate change as measured by watts / metre2. It is a scientific concept used to quantify and compare the external ...
, the change in energy flux in the atmosphere caused by climate change factors *
Random forest Random forests or random decision forests is an ensemble learning method for classification, regression and other tasks that operates by constructing a multitude of decision trees at training time. For classification tasks, the output of th ...
, an ensemble learning method in data science *
Rutherfordium Rutherfordium is a chemical element with the symbol Rf and atomic number 104, named after New Zealand-born British physicist Ernest Rutherford. As a synthetic element, it is not found in nature and can only be made in a laboratory. It is radioactiv ...
, symbol Rf, a chemical element *
Canon RF mount The Canon RF lens mount is an interchangeable-lens mount developed by Canon for its full-frame mirrorless interchangeable-lens cameras, and featured first by the EOS R, followed by the EOS RP. The RF mount was announced in September 2018. In M ...


Sports

* Range Factor, a baseball statistic *
Right fielder A right fielder, abbreviated RF, is the outfielder in baseball or softball who plays defense in right field. Right field is the area of the outfield to the right of a person standing at home plate and facing towards the pitcher's mound. In the ...
, a defensive position in baseball *
Swedish Sports Confederation The Swedish Sports Confederation ( sv, Riksidrottsförbundet, RF) is the umbrella organisation of the Swedish sports movement. Through its member organisations, it has three million members in 22,000 clubs. The Confederation was formed on 31 May 1 ...
( sv, link=no, Riksidrottsförbundet, RF), the umbrella organisation for Swedish sports


Other uses

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Registered association (Finland) In Finland a (Finnish for registered association) or (Swedish) is a registered, non-profit organization. The abbreviations (Finnish) or (Swedish) are used as a suffix ending of the association's name, added when the association is officiall ...
, legal status *
Royalty-free Royalty-free (RF) material subject to copyright or other intellectual property rights may be used without the need to pay royalties or license fees for each use, per each copy or volume sold or some time period of use or sales. Computer standard ...
, in business {{disambiguation