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DCA Company
DCA may refer to: Computers * Document Content Architecture, an IBM document standard * Dynamic Channel Allocation/Assignment, in wireless networks * DTS Coherent Acoustics in DTS (sound system) Military * Defence Cyber Agency, a tri-service command of the Indian Armed Forces * Defense Communications Agency, former name of US Defense Information Systems Agency * Defensive counter air (''Défense contre les aéronefs''), French term for air defense * Deputy Commandant for Aviation, principle advisor on all aviation matters in the United States Marine Corps Organizations * California Department of Consumer Affairs * Department for Constitutional Affairs of the UK government, 2003-2007 * DCA Design * Department of Civil Aviation (Australia) * Department of Civil Aviation (Thailand) * Digital Communications Associates, US company * Diyanet Center of America, Lanham, Maryland * Drum Corps Associates, a governing body of drum corps in North America * Dundee Contemporar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Document Content Architecture
Document Content Architecture, or DCA for short, is a standard developed by IBM for text documents in the early 1980s. DCA was used on mainframe and IBM i systems, and formed the basis of DisplayWrite's file format. DCA was later extended as MO:DCA (Mixed Object Document Content Architecture), which added embedded data files. The original purpose of DCA was to provide a common document format that could be used across multiple IBM word processing platforms, such as the IBM PC, IBM mainframes, the Displaywriter System, and the IBM 5520 Administrative System. DCA defines two types of documents: * ''Revisable-Form Text'' (DCA/RFT) which is editable. * ''Final-Form Text'' (DCA/FFT) which is "formatted for a particular output device and cannot be changed." Description DCA defines a data stream representing a document. MO:DCA is the wrapper or container for various ''objects'' that can make up the document. Each object is defined by its own subordinate architecture. The architec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dundee Contemporary Arts
Dundee Contemporary Arts (DCA) is an art centre in Dundee, Scotland, with two contemporary art galleries, a two-screen cinema, a print studio, a learning and public engagement programme, a shop and a café bar. The director of DCA is Beth Bate. History DCA opened on 20 March 1999, but the idea of establishing a visual arts centre in Dundee had been discussed by many concerned parties from the mid-1980s. In particular, there was a desire to both nurture the students and graduates of Duncan of Jordanstone College of Art & Design (now a school of the University of Dundee and one of the leading art colleges in the UK) and to build upon the work of those involved with the (now closed) Seagate Gallery and Dundee Printmakers' Workshop. Additionally, it was hoped that the project would replace and improve upon the only arthouse cinema in Dundee—the part-time Steps Theatre, which closed when DCA, with its two-screen (and full-time) cinema, opened. Initiated by Dundee Printmakers W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dollar Cost Averaging
Dollar cost averaging (DCA) is an investment strategy that aims to apply value investing principles to regular investment. The term was first coined by Benjamin Graham in his book ''The Intelligent Investor''. Graham writes that dollar cost averaging "means simply that the practitioner invests in common stocks the same number of dollars each month or each quarter. In this way he buys more shares when the market is low than when it is high, and he is likely to end up with a satisfactory overall price for all his holdings." Dollar cost averaging is also called pound-cost averaging (in the UK), and, irrespective of currency, unit cost averaging, incremental trading, or the cost average effect. It should not be confused with the constant dollar plan, which is a form of rebalancing investments. The technique is so called because of its potential for reducing the average cost of shares bought. As the number of shares that can be bought for a fixed amount of money varies inversely wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Caribbean Airlines
Dutch Caribbean Airlines was an airline based in Curaçao, part of the Kingdom of the Netherlands. It was established in 1964 and ceased operation in 2004. The company slogan was ''Bridge to Curaçao.'' History The airline was succeeded by Air ALM, which was owned by the same DC Holding that owned ALM Antillean Airlines and later Dutch Caribbean Airlines. Destinations These are the destinations that were operated by "Dutch Caribbean Airlines" when the airline was in service: Caribbean ; * Oranjestad (Queen Beatrix International Airport) ; * Puerto Plata (Gregorio Luperón International Airport) *Punta Cana (Punta Cana International Airport) *Santo Domingo (Las Américas International Airport) ; *Port-au-Prince (Toussaint Louverture International Airport) ; *Kralendijk (Flamingo International Airport) *Willemstad (Hato International Airport) * Philipsburg (Princess Juliana International Airport) ; *Port of Spain (Piarco International Airport) Europe ; *Cologne (Cologn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronald Reagan Washington National Airport
Ronald Reagan Washington National Airport , sometimes referred to colloquially as National Airport, Washington National, Reagan National Airport, DCA, Reagan, or simply National, is an international airport in Arlington County, Virginia, across the Potomac River from Washington, D.C. It is the smaller of two airports operated by the Metropolitan Washington Airports Authority (MWAA) that serve the National Capital Region (NCR) around Washington, D.C. (the larger being Dulles International Airport about to the west in Virginia's Fairfax and Loudoun counties). The airport is from downtown Washington, D.C., and the city is visible from the airport. The airport's original name was Washington National Airport. In 1998, Congress renamed it Ronald Reagan National Airport in honor of President Ronald Reagan. MWAA operates the airport with close oversight by the federal government due to its proximity to the national capital. Flights into and out of the airport are generally not allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distributors Corporation Of America
Distributors Corporation of America (DCA) was an American film distribution company which distributed 60 films in the US between 1952 and 1959. DCA distributed the 1956 re-releases of ''The Naked City'' (1948) and '' Brute Force'' (1947), both produced by Mark Hellinger and directed by Jules Dassin. DCA also distributed ''I Am a Camera'' (1955), starring Julie Harris and Laurence Harvey. Because of the original script's treatment of abortion, the film ran into censorship from the Production Code. Hal Roach took over the company in late 1958 although DCA president Fred Schwartz remained with the company. Among the last films DCA distributed were ''Plan 9 from Outer Space'' (1957), ''Half Human'' (1958), ''The Strange World of Planet X'' (1958), and ''The Crawling Eye'' (1958). Filmography *''Alraune'' (1952) *'' Le Salaire de la peur'' (1953) released in the US as ''The Wages of Fear'' *'' Dreaming Lips'' (1953) German-language remake of '' Dreaming Lips'' (1937) *''Questa è la v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Coupling Analysis
Direct coupling analysis or DCA is an umbrella term comprising several methods for analyzing sequence data in computational biology. The common idea of these methods is to use statistical modeling to quantify the strength of the direct relationship between two positions of a biological sequence, excluding effects from other positions. This contrasts usual measures of correlation, which can be large even if there is no direct relationship between the positions (hence the name ''direct'' coupling analysis). Such a direct relationship can for example be the evolutionary pressure for two positions to maintain mutual compatibility in the biomolecular structure of the sequence, leading to molecular coevolution between the two positions. DCA has been used in the inference of protein residue contacts, RNA structure prediction, the inference of protein-protein interaction networks, the modeling of fitness landscapes, and the identification of functionally relevant residue communities. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitally-controlled Amplifier
A variable-gain (VGA) or voltage-controlled amplifier (VCA) is an electronic amplifier that varies its gain depending on a control voltage (often abbreviated CV). VCAs have many applications, including audio level compression, synthesizers and amplitude modulation. A crude example is a typical inverting op-amp configuration with a light-dependent resistor (LDR) in the feedback loop. The gain of the amplifier then depends on the light falling on the LDR, which can be provided by an LED (an optocoupler). The gain of the amplifier is then controllable by the current through the LED. This is similar to the circuits used in optical audio compressors. A voltage-controlled amplifier can be realised by first creating a voltage-controlled resistor (VCR), which is used to set the amplifier gain. The VCR is one of the numerous interesting circuit elements that can be produced by using a JFET (junction field-effect transistor) with simple biasing. VCRs manufactured in this way can be obt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichloroethane
Dichloroethane can refer to either of two isomeric organochlorides with the molecular formula C2H4Cl2: * 1,1-Dichloroethane (ethylidene chloride) * 1,2-Dichloroethane (ethylene dichloride) See also *Dichloroethene *Difluoroethane Difluoroethane may refer to: * 1,1-Difluoroethane * 1,2-Difluoroethane See also * Difluoroethene * Dichloroethane Dichloroethane can refer to either of two isomeric organochlorides with the molecular formula C2H4Cl2: * 1,1-Dichloroethane (ethyl ... {{Chemistry index de:Dichlorethan ru:Дихлорэтан ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichloroacetic Acid
Dichloroacetic acid (DCA), sometimes called bichloroacetic acid (BCA), is the chemical compound with formula . It is an acid, an analogue of acetic acid, in which 2 of the 3 hydrogen atoms of the methyl group have been replaced by chlorine atoms. Like the other chloroacetic acids, it has various practical applications. The salts and esters of dichloroacetic acid are called dichloroacetates. Salts of DCA have been studied as potential drugs because they inhibit the enzyme pyruvate dehydrogenase kinase. Although preliminary studies found that DCA can slow the growth of certain tumors in animal studies and ''in vitro'' studies, as of 2012 insufficient evidence supported the use of DCA for cancer treatment. Chemistry and occurrence The chemistry of dichloroacetic acid is typical for halogenated organic acids. It is a member of the chloroacetic acids family. The dichloroacetate ion is produced when the acid is mixed with water. As an acid with a p''K''a of 1.35, pure dichloroacetic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detrended Correspondence Analysis
Detrended correspondence analysis (DCA) is a multivariate statistical technique widely used by ecologists to find the main factors or gradients in large, species-rich but usually sparse data matrices that typify ecological community data. DCA is frequently used to suppress artifacts inherent in most other multivariate analyses when applied to gradient data. History DCA was created in 1979 by Mark Hill of the United Kingdom's Institute for Terrestrial Ecology (now merged into Centre for Ecology and Hydrology) and implemented in FORTRAN code package called DECORANA (Detrended Correspondence Analysis), a correspondence analysis method. DCA is sometimes erroneously referred to as DECORANA; however, DCA is the underlying algorithm, while DECORANA is a tool implementing it. Issues addressed According to Hill and Gauch, DCA suppresses two artifacts inherent in most other multivariate analyses when applied to gradient data. An example is a time-series of plant species colonising a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
