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Ras
Ras or RAS may refer to: Arts and media * RAS Records Real Authentic Sound, a reggae record label * Rundfunk Anstalt Südtirol, a south Tyrolese public broadcasting service * Rás 1, an Icelandic radio station * Rás 2, an Icelandic radio station * Raise A Suilen, a Japanese band Organizations * Railway Air Services, a UK airline * Rajasthan Administrative Service, India * Remote Astronomical Society Observatory of New Mexico * Richard Allen Schools, a charter school system in Ohio, USA * Richardson Adventist School, now North Dallas Adventist Academy * IEEE Robotics and Automation Society * Royal Air Squadron, a flying club in the UK * Royal American Shows, an American travelling carnival company operating from the 1920s to the 1990s * Royal Asiatic Society of Great Britain and Ireland * Royal Astronomical Society, UK, founded 1820 * Russian Academy of Sciences Biology * RAAS, the renin–angiotensin system, a hormone system that regulates blood pressure * Recurrent aphtho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ras Subfamily
Ras, from "Rat sarcoma virus", is a family of related proteins that are expressed in all animal cell lineages and organs. All Ras protein family members belong to a class of protein called small GTPase, and are involved in transmitting signals within cells ( cellular signal transduction). Ras is the prototypical member of the Ras superfamily of proteins, which are all related in three-dimensional structure and regulate diverse cell behaviours. When Ras is 'switched on' by incoming signals, it subsequently switches on other proteins, which ultimately turn on genes involved in cell growth, differentiation, and survival. Mutations in Ras genes can lead to the production of permanently activated Ras proteins, which can cause unintended and overactive signaling inside the cell, even in the absence of incoming signals. Because these signals result in cell growth and division, overactive Ras signaling can ultimately lead to cancer. The three Ras genes in humans (''HRAS'', '' KRAS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ras Superfamily
The Ras superfamily, derived from "Rat sarcoma virus", is a protein superfamily of small GTPases. Members of the superfamily are divided into families and subfamilies based on their structure, sequence and function. The five main families are Ras, Rho, Ran, Rab and Arf GTPases. The Ras family itself is further divided into 6 subfamilies: Ras, Ral, Rap, Rheb, Rad and Rit. ''Miro'' is a recent contributor to the superfamily. Each subfamily shares the common core G domain, which provides essential GTPase and nucleotide exchange activity. The surrounding sequence helps determine the functional specificity of the small GTPase, for example the 'Insert Loop', common to the Rho subfamily, specifically contributes to binding to effector proteins such as WASP. In general, the Ras family is responsible for cell proliferation: Rho for cell morphology, Ran for nuclear transport, and Rab and Arf for vesicle transport. Subfamilies and members The following is a list of human prote ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rás 2
Rás 2 (''Channel 2'') is an Icelandic radio station belonging to the National Icelandic Broadcasting Service, RÚV. Launched on 1 December 1983, it is currently the highest-rated radio station in Iceland, with a schedule composed chiefly of news, current affairs, and pop and rock music. Rás 2 is broadcast throughout the country from a network of 90 FM transmitters (99.9 MHz is the channel's main frequency in Reykjavík), via Satellite and also streamed on the Internet. Logos File:Ras2logo.png, 1983 to 2011 Rás 2 (2011).png, 2011 to 2019 See also * Rás 1 * RÚV Ríkisútvarpið (RÚV) (pronounced or ) ( en, 'The Icelandic National Broadcasting Service') is Iceland's national public-service broadcasting organization. Operating from studios in the country's capital, Reykjavík, as well as regional cent ... References External links * Radio stations in Iceland Companies based in Reykjavík Radio stations established in 1983 {{Iceland-media-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Academy Of Sciences
The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals. Peter the Great established the Academy (then the St. Petersburg Academy of Sciences) in 1724 with guidance from Gottfried Leibniz. From its establishment, the Academy benefitted from a slate of foreign scholars as professors; the Academy then gained its first clear set of goals from the 1747 Charter. The Academy functioned as a university and research center throughout the mid-18th century until the university was dissolved, leaving research as the main pillar of the institution. The rest of the 18th century continuing on through the 19th century consisted of many published academic works from Academy scholars and a few Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAS Records
RAS Records, also known as Real Authentic Sound, is a reggae record label. History RAS Records was founded in 1979 by Doctor Dread. In his travels to Jamaica he created a network within the reggae artist community there. By the early to mid-1980s, RAS had signed artists such as Black Uhuru, Inner Circle (reggae band), Inner Circle, Culture, Junior Reid, Yellowman, and Freddie McGregor. This allowed RAS to grow significantly throughout the world. To date, the label has also signed artists including Luciano (singer), Luciano, The Wailers Band, Sizzla and Tony Rebel. Awards Over the years, several RAS artists have been nominated for a Grammy Award. In 1996, Bunny Wailer received an award for his tribute album, ''Hall of Fame: A Tribute to Bob Marley's 50th Anniversary''. RAS artists *Luciano (singer), Luciano *The Wailers Band *Junior Reid *Culture (band), Culture *Black Uhuru *Inner Circle (reggae band), Inner Circle *Don Carlos (musician), Don Carlos *Yellowman *J.C. Lodge *Fredd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE Robotics And Automation Society
The IEEE Robotics and Automation Society (IEEE RAS) is a professional society of the IEEE that supports the development and the exchange of scientific knowledge in the fields of robotics and automation, including applied and theoretical issues. History The initial IEEE Robotics and Automation (R&A) entity, the Robotics and Automation Council, was founded in 1984 by a number of IEEE Societies including Aerospace and Electronic Systems, Circuits and Systems, Components, Hybrids, and Manufacturing Technology, Computers, Control Systems, Industrial Electronics, Industry Applications, and Systems, Man and Cybernetics. In 1987 the council became the IEEE Robotics and Automation Society. Field of interest The Society states in its constitution that it "is interested in both applied and theoretical issues in robotics and automation. Robotics is here defined to include intelligent machines and systems used, for example, in space exploration, human services, or manufacturing; wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rás 1
Rás 1 (; ''Channel 1'') is an Icelandic radio station belonging to and operated by Ríkisútvarpið (RÚV), Iceland's national public service broadcaster. Broadcast throughout Iceland on FM (92.4 and 93.5 MHz in Reykjavík), via satellite and also 189 kHz longwave, it is currently among the country's most listened-to radio stations. History Having been on the air since 20 December 1930, using the call-sign Útvarp Reykjavík (Radio Reykjavík), the station adopted its present name on 1 December 1983 when RÚV began transmitting a second radio channel, which is known as Rás 2. Programming Rás 1 carries primarily news, weather, current affairs coverage, and cultural programming dealing with the arts, history, the Icelandic language, literature, and social and environmental issues. See also * Bylgjan * Rás 2 Rás 2 (''Channel 2'') is an Icelandic radio station belonging to the National Icelandic Broadcasting Service, RÚV. Launched on 1 December 1983, it is c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retinoic Acid Syndrome
Retinoic acid syndrome (RAS) is a potentially life-threatening complication observed in people with acute promyelocytic leukemia (APML) and first thought to be specifically associated with all-''trans'' retinoic acid (ATRA) (also known as tretinoin) treatment. Subsequently, so-called RAS was recognized in APML patients who had been treated with another highly efficacious drug, arsenic trioxide, and yet did not appear in patients treated with tretinoin for other disorders. These facts and others support the notion that RAS depends on the presence of the malignant promyelocytes. This has led to the growing deprecation of the term 'retinoic acid syndrome' and to an increasing use of the term differentiation syndrome to signify this APML treatment complication. Signs and symptoms The syndrome is characterized by dyspnea, fever, weight gain, hypotension, and pulmonary infiltrates. This is effectively treated by giving dexamethasone and withholding ATRA (or arsenic trioxide) in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAS Algorithm
The iterative proportional fitting procedure (IPF or IPFP, also known as biproportional fitting or biproportion in statistics or economics (input-output analysis, etc.), RAS algorithm in economics, raking in survey statistics, and matrix scaling in computer science) is the operation of finding the fitted matrix X which is the closest to an initial matrix Z but with the row and column totals of a target matrix Y (which provides the constraints of the problem; the interior of Y is unknown). The fitted matrix being of the form X=PZQ, where P and Q are diagonal matrices such that X has the margins (row and column sums) of Y. Some algorithms can be chosen to perform biproportion. We have also the entropy maximization, information loss minimization (or cross-entropy) or RAS which consists of factoring the matrix rows to match the specified row totals, then factoring its columns to match the specified column totals; each step usually disturbs the previous step’s match, so these steps are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recirculating Aquaculture System
Recirculating aquaculture systems (RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. Other types of filtration and environmental control are often also necessary to maintain clean water and provide a suitable habitat for fish. The main benefit of RAS is the ability to reduce the need for fresh, clean water while still maintaining a healthy environment for fish. To be operated economically commercial RAS must have high fish stocking densities, and many researchers are currently conducting studies to determine if RAS is a viable form of intensive aquaculture. RAS water treatment processes A series of treatment processes is utilized to maintain water quality in intensive fish farming operations. These steps are often done in order or sometimes in tandem. After leaving the vessel holding fish the water is first treated for solids before entering a biofilter to convert ammonia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAS Supergroup
The SAR supergroup, also just SAR or Harosa, is a clade that includes stramenopiles ( heterokonts), alveolates, and Rhizaria. The name is an acronym derived from the first letters of each of these clades; it has been alternatively spelled "RAS". The term "Harosa" (at the subkingdom level) has also been used. The SAR supergroup is a node-based taxon. Note that as a formal taxon, "Sar" has only its first letter capitalized, while the earlier abbreviation, SAR, retains all uppercase letters. Both names refer to the same group of organisms, unless further taxonomic revisions deem otherwise. Members of the SAR supergroup were once included under the separate supergroups Chromalveolata ( Chromista and Alveolata) and Rhizaria, until phylogenetic studies confirmed that stramenopiles and alveolates diverged with Rhizaria. This apparently excluded haptophytes and cryptomonads, leading Okamoto ''et al.'' (2009) to propose the clade Hacrobia to accommodate them. Phylogeny Based ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Respiratory Airway Secretory Cell
The respiratory airway secretory cell (RAS), is found in the lungs of humans and some other mammals, notably ferrets. They are facultative progenitors that have important functional roles in maintaining lung airway health. Their role in maintaining the gas-exchange compartment of the lung is critical and they may be altered in chronic lung disease. Function RAS cells secrete molecules that maintain the fluid lining along bronchioles, which helps to prevent the tiny airways from collapsing. This maximizes the efficiency of the lungs. The cells also act as progenitor cells for alveolar type 2 (AT2) cells, which are a special type of alveoli that secrete a chemical used, in part, to repair other damaged alveoli.Baker, Harry, Scientists Have Discovered a Brand-New Type of Cell Hiding in The Human Body', Live Science, Science Alert Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Sci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
