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**Double Wing Attack**- Double Wing Attack (相掛かり aigakari), or simply Wing Attack, is a Double Static Rook opening in shogi where both sides play Static Rook with the first several moves on each side being identical or very similar. This one of the most traditional josekis dating back to 200 years ago.The initial aim of the Double Wing Attack to threaten each opponent's bishop. From the start of the game, the pawn at the head of each bishop (2c for White, 8g for Black) is undefended. By advancing each player's rook ...
**Dynkin diagram**- In the mathematical field of Lie theory, a Dynkin diagram, named for Eugene Dynkin, is a type of graph with some edges doubled or tripled (drawn as a double or triple line). The multiple edges are, within certain constraints, directed.The main interest in Dynkin diagrams are as a means to classify semisimple Lie algebras over algebraically closed fields. This gives rise to Weyl groups, i.e. to many (although not all) finite reflection groups. Dynkin diagrams may also arise in other contexts.T...
**December 2010 in sports****December 2011 in sports****Driver deaths in motorsport**- Due to the inherently dangerous nature of auto racing, many individuals, including drivers, crew members, officials and spectators, have been killed in crashes related to the sport, in races, in qualifying, in practice or in private testing sessions. Deaths among racers and spectators were numerous in the early years of racing. However advances in safety technology, and specifications designed by sanctioning bodies to limit speeds, have reduced deaths in recent years. Spectacular accidents ha...
**Deputies of the 14th National Assembly of France by constituency**- List by constituency of the 577 deputies of the 14th French National Assembly (2012-2017) elected in 2012.
**Demographics of Russia**- The demographics of Russia is about the demographic features of the population of the Russian Federation including population growth, population density, ethnic composition, education level, health, economic status and other aspects.According to an official estimate for 2016, the population of Russia is of 146,600,000 inhabitants (April 1, 2016 estimate).As of 2014, Russian TFR of 1.750 children per woman was the highest in Eastern, Southern and Central Europe. In 2013, Russia experienced the...
**December 2009 in sports****Demographics of Ukraine**- The demographics of Ukraine include statistics on population growth, population density, ethnicity, education level, health, economic status, religious affiliations, and other aspects of the population.The data in this article are based on the most recent Ukrainian Census, which was carried out in 2001, the CIA World Factbook, and the State Statistics Committee of Ukraine. The next census is scheduled to take place in 2020.The total population of 42,650,186 depicted here excludes Crimea and S...
**Discontinued ISSF shooting events**- This article includes the ISSF World Shooting Championships medal tables of currently discontinued shooting events. The events that International Shooting Sport Federation presently includes in World Championships and Olympic Games are listed in ISSF shooting events article.This event was held at World Championships in 1897-1986.This event was held at World Championships in 1937-1986.This event was held at World Championships in 1897-1990.This event was held at World Championships in 1937-199...
**December 2008 in sports****Defunct local councils of the Boy Scouts of America**- The many local councils have gone through a total of thousands of name changes, merges, splits and re-creations since the establishment of the Boy Scouts of America in 1910.
**Dynamic epistemic logic**- Dynamic epistemic logic (DEL) is a logical framework dealing with knowledge and information change. Typically, DEL focuses on situations involving multiple agents and studies how their knowledge changes when events occur. These events can change factual properties of the actual world (they are called ontic events): for example a red card is painted in blue. They can also bring about changes of knowledge without changing factual properties of the world (they are called epistemic events): for e...
**Double (association football)**- The Double, in association football, is the achievement of winning a country's top tier division and its primary cup competition in the same season. The lists in this article examine this definition of a double. It can also mean beating a team both home and away in the same league season, a feat often noted as doing the double over a particular opponent.The first club to achieve a double was Preston North End in 1889, winning the FA Cup and the Football League in the inaugural season of the l...
**Dirac delta function**- In mathematics, the Dirac delta function, or δ function, is a generalized function, or distribution, on the real number line that is zero everywhere except at zero, with an integral of one over the entire real line. The delta function is sometimes thought of as a hypothetical function whose graph is an infinitely high, infinitely thin spike at the origin, with total area one under the spike, and physically represents the density of an idealized point mass or point charge. It was introduced by...
**Dimension theory (algebra)**- In mathematics, dimension theory is the study in terms of commutative algebra of the notion dimension of an algebraic variety (and by extension that of a scheme). The need of a theory for such an apparently simple notion results from the existence of many definitions of the dimension that are equivalent only in the most regular cases (see Dimension of an algebraic variety). A large part of dimension theory consists in studying the conditions under which several dimensions are equal, and many ...
**Daniel Nestor**- Daniel Mark Nestor CM (born September 4, 1972 as Danijel Nestorović) is a Canadian professional tennis player from Toronto, Ontario. He is one of the foremost doubles players in tennis history due to his longevity and continued success at the top of the men's game. As of August 2015, he is tenth for most men's ATP titles in Open Era history.Thus far he has won 88 men's doubles titles (with 10 different partners), including a Gold medal at the 2000 Summer Olympics, four ATP World Tour Finals, ...
**Determinant**- In linear algebra, the determinant is a useful value that can be computed from the elements of a square matrix. The determinant of a matrix A is denoted det(A), det A, or |A|. It can be viewed as the scaling factor of the transformation described by the matrix.In the case of a 2 × 2 matrix, the specific formula for the determinant:Similarly, suppose we have a 3 × 3 matrix A, and we want the specific formula for its determinant |A|:Each determinant of a 2 × 2 matrix in this equation is called ...
**Discrete Fourier transform**- In mathematics, the discrete Fourier transform (DFT) converts a finite sequence of equally-spaced samples of a function into an equivalent-length sequence of equally-spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-valued function of frequency. The interval at which the DTFT is sampled is the reciprocal of the duration of the input sequence. An inverse DFT is a Fourier series, using the DTFT samples as coefficients of complex sinusoids at the corresponding DTFT...
**Dancesport at the 2007 Asian Indoor Games**- Dancesport at the 2007 Asian Indoor Games was held in Macau Forum, Macau, China from 27 October to 28 October 2007.October 28October 27
**Denmark at the FIFA World Cup**- The FIFA World Cup, sometimes called the Football World Cup or the Soccer World Cup, but usually referred to simply as the World Cup, is an international association football competition contested by the men's national teams of the members of Fédération Internationale de Football Association (FIFA), the sport's global governing body. The championship has been awarded every four years since the first tournament in 1930, except in 1942 and 1946, due to World War II.The tournament consists of tw...
**David Vitter**- David Bruce Vitter (born May 3, 1961) is the senior United States Senator from Louisiana and a member of the Republican Party. Previously, he served in the United States House of Representatives, representing the suburban Louisiana's 1st congressional district. He served as a member of the Louisiana House of Representatives before entering the U.S. House.He won a second Senate term in 2010, defeating a Democratic challenge from U.S. Representative Charlie Melancon of Napoleonville, the seat o...
**Danish monarchs' family tree**- This is the Danish monarchs' family tree from 1047 to the present ruler, queen Margrethe II of Denmark.See also: Denmark — History of Denmark — List of Danish monarchs — Danish royal family treeNote: Thia chart also includes the kings from the Houses of Bjelbo (Olaf II); Pomerania (Eric VII) and Palatinate-Neumarkt (Christopher III)
**Disjunct matrix**- Disjunct and separable matrices play a pivotal role in the mathematical area of non-adaptive group testing. This area investigates efficient designs and procedures to identify 'needles in haystacks' by conducting the tests on groups of items instead of each item alone. The main concept is that if there are very few special items (needles) and the groups are constructed according to certain combinatorial guidelines, then one can test the groups and find all the needles. This can reduce the cos...
**Denmark national football team**- The Denmark national football team (Danish: Danmarks fodboldlandshold) represents Denmark in association football and is controlled by the Danish Football Association (DBU), the governing body for the football clubs which are organized under DBU. Denmark's home ground is Telia Parken in the Østerbro district of Copenhagen, and their head coach is Åge Hareide.Denmark were the winners of the Football at the 1906 Intercalated Games and silver medalists at the 1908 and 1912 Olympics. However, as ...
**Dictionary of chemical formulas**- This is a list of common chemical compounds with chemical formulas and CAS numbers, indexed by formula. This complements alternative listing at inorganic compounds by element. There is no complete list of chemical compounds, since by nature the list would be infinite.Note: There are elements for which spellings may differ, such as aluminum/aluminium, sulfur/sulphur, and cesium/caesium.
**Dominican Republic at the 2015 Pan American Games**- The Dominican Republic competed in the 2015 Pan American Games in Toronto, Canada from July 10 to 26, 2015. The country had 250 athletes in 26 sports.Boxer Juan Ramón Solano was selected to be the flagbearer of the team during the opening ceremony. But shooter Eduardo Lorenzo carried the flag instead.The following table lists The Dominican Republic's delegation per sport and gender.The following competitors from the Dominican Republic won medals at the games. In the by discipline sections bel...
**Dwight D. Eisenhower**- President of the United StatesFirst TermSecond TermPost-PresidencyLibraryDwight David "Ike" Eisenhower (/ˈaɪzənˌhaʊ.ər/ EYE-zən-HOW-ər; October 14, 1890 – March 28, 1969) was an American politician and general who served as the 34th President of the United States from 1953 until 1961. He was a five-star general in the United States Army during World War II and served as Supreme Commander of the Allied Forces in Europe. He was responsible for planning and supervising the invasion of North...
**Dominican Republic at the 2011 Pan American Games**- The Dominican Republic competed at the 2011 Pan American Games in Guadalajara, Mexico from October 14 to 30, 2011. Gabriel Mercedes a taekwondo athlete was selected to carry the flag during the opening ceremony.The Dominican Republic has qualified one female athlete in the archery competition.The Dominican Republic has qualified two male and female athletes in the individual and team badminton competitions.The Dominican Republic has qualified a baseball team of twenty athletes to participate....
**December 2006 in sports****Dynamic logic (modal logic)**- Dynamic logic is an extension of modal logic originally intended for reasoning about computer programs and later applied to more general complex behaviors arising in linguistics, philosophy, AI, and other fields.Modal logic is characterized by the modal operators ◻ p {\displaystyle \Box p} (box p) asserting that p {\displaystyle p\,\!} is necessarily the case, and ◊ p {\displaystyle \Diamond p} (diamond p) asserting that p {\displaystyle p\,\!} is...
**DreamHack**- DreamHack is the world's largest digital festival, a local area network gathering with live concerts and competitions in digital art and esports first held in Malung, Sweden. DreamHack consists of several events held throughout Europe: in Stockholm and Jönköping, Sweden, Tours, France, Bucharest and Cluj, Romania, Valencia, Spain, London, England and Leipzig, Germany. In May 2016 DreamHack held its first event on the American continent in Austin, Texas. In August 2016, it will hold its first ...
**District line**- The District line is a London Underground service that crosses Greater London from east to west. From Upminster, the eastern terminus, the line runs through Central London to Earl's Court before dividing into three western branches, to Ealing Broadway, Wimbledon and Richmond. There is a short branch that goes from Earl's Court to Kensington (Olympia). A branch also runs north from Earl's Court to Edgware Road via Paddington. Coloured green on the tube map, the line serves 60 stations in 40 mi...
**Devanagari**- Devanagari (DAY-və-NAH-gər-ee; Hindustani: [d̪eːʋˈnaːɡri]; देवनागरी devanāgarī a compound of "deva" [देव] and "nāgarī" [नागरी]), also called Nagari (Nāgarī, नागरी), is an abugida (alphasyllabary) alphabet of India and Nepal. It is written from left to right, has a strong preference for symmetrical rounded shapes within squared outlines, and is recognisable by a horizontal line that runs along the top of full letters. In a cursory look, the Devanagari script appears different from other I...
**Dirichlet-multinomial distribution**- In probability theory and statistics, the Dirichlet-multinomial distribution is a family of discrete multivariate probability distributions on a finite support of non-negative integers. It is also called the Dirichlet compound multinomial distribution (DCM) or multivariate Pólya distribution (after George Pólya). It is a compound probability distribution, where a probability vector p is drawn from a Dirichlet distribution with parameter vector α {\displaystyle {\boldsymbol {\al...
**December 2010**- December 2010 was the twelfth and final month of that common year. The month, which began on a Wednesday, ended on a Friday after 31 days.This is an archived version of Wikipedia's Current events Portal from December 2010.Tornado in Aumsville, Oregonedit this archived sidebar
**Derivation of the Navier–Stokes equations**- The intent of this article is to highlight the important points of the derivation of the Navier–Stokes equations as well as the application and formulation for different families of fluids.The Navier–Stokes equations are based on the assumption that the fluid, at the scale of interest, is a continuum, in other words is not made up of discrete particles but rather a continuous substance. Another necessary assumption is that all the fields of interest like pressure, flow velocity, density, and ...
**Differential geometry of surfaces**- In mathematics, the differential geometry of surfaces deals with the differential geometry of smooth surfaces with various additional structures, most often, a Riemannian metric. Surfaces have been extensively studied from various perspectives: extrinsically, relating to their embedding in Euclidean space and intrinsically, reflecting their properties determined solely by the distance within the surface as measured along curves on the surface. One of the fundamental concepts investigated is t...
**Didier Pittet**- Didier Pittet (born 20 March 1957 in Geneva, Switzerland) is the director of the Infection Control Programme and WHO Collaborating Centre on Patient Safety, University Hospital of Geneva, Geneva, Switzerland. Since 2005, Pittet is also the External Lead of the World Health Organization (WHO) Global Patient Safety Challenge "Clean Care is Safer Care" and African Partnerships for Patient Safety.In the 2007 New Year Honours List, Didier Pittet was awarded the Honorary Commander of the British Em...
**Dreyfus affair**- The Dreyfus affair (French: l'affaire Dreyfus, pronounced: [la.fɛʁ dʁɛ.fys]) was a political scandal that divided France from 1894 until its resolution in 1906. The affair is often seen as a modern and universal symbol of injustice, and remains one of the most striking examples of a complex miscarriage of justice, where a major role was played by the press and public opinion.The scandal began in December 1894, with the treason conviction of Captain Alfred Dreyfus, a young French artiller...
**Derivative**- The derivative of a function of a real variable measures the sensitivity to change of a quantity (a function value or dependent variable) which is determined by another quantity (the independent variable). Derivatives are a fundamental tool of calculus. For example, the derivative of the position of a moving object with respect to time is the object's velocity: this measures how quickly the position of the object changes when time is advanced.The derivative of a function of a single variable ...
**District Railway**- The Metropolitan District Railway (commonly known as the District Railway) was a passenger railway that served London from 1868 to 1933. Established in 1864 to complete the inner circle, an underground railway in London, the first part of the line opened using gas-lit wooden carriages hauled by steam locomotives. The Metropolitan Railway operated all services until the District introduced its own trains in 1871. The railway was soon extended westwards through Earl's Court to Fulham, Richmond,...
**Demographics of Calgary**- In the 2011 Census, the City of Calgary had a population of 1,096,833 residents, representing 30% of the 3,645,257 residents in all of Alberta, and compared to a population of 33,476,688 in all of Canada. The total population of the Calgary census metropolitan area (CMA) was 1,214,839. Calgary is the largest city in Alberta, and the third-largest municipality and fifth-largest metropolitan area in Canada.Section 57 of Alberta's Municipal Government Act (MGA) enables municipalities to conduct ...
**De Broglie–Bohm theory**- The de Broglie–Bohm theory, also known as the pilot-wave theory, Bohmian mechanics, the Bohm or Bohm's interpretation, and the causal interpretation, is an interpretation of quantum theory. In addition to a wavefunction on the space of all possible configurations, it also postulates an actual configuration that exists even when unobserved. The evolution over time of the configuration (that is, of the positions of all particles or the configuration of all fields) is defined by the wave functio...
**Design of the FAT file system**- A FAT file system is a specific type of computer file system architecture and a family of industry-standard file systems utilizing it.The FAT file system is a legacy file system which is simple and robust. It offers good performance even in very light-weight implementations, but cannot deliver the same performance, reliability and scalability as some modern file systems. It is, however, supported for compatibility reasons by nearly all currently developed operating systems for personal comput...
**Directional derivative**- In mathematics, the directional derivative of a multivariate differentiable function along a given vector v at a given point x intuitively represents the instantaneous rate of change of the function, moving through x with a velocity specified by v. It therefore generalizes the notion of a partial derivative, in which the rate of change is taken along one of the curvilinear coordinate curves, all other coordinates being constant.The directional derivative is a special case of the Gâteaux deriv...
**Dutch monarchs family tree**- The following is a family tree for the Princes of Orange, a line which culminated in the Dutch monarchy with the accession of Prince William VI to the newly created throne of the Netherlands in 1815. Dates given are those of birth and death; for Princes of Orange (shown in bold), the intermediate date is the date of accession to the Princedom. By virtue of his marriage to Mary II of England, Prince William III, himself a grandson of Charles I of England, became King of England 1689–1702 (join...
**Deep learning**- Deep learning (also known as deep structured learning, hierarchical learning or deep machine learning) is a branch of machine learning based on a set of algorithms that attempt to model high-level abstractions in data by using a deep graph with multiple processing layers, composed of multiple linear and non-linear transformations.Deep learning is part of a broader family of machine learning methods based on learning representations of data. An observation (e.g., an image) can be represented i...
**December 2012**- December 2012 was the twelfth and final month of that leap year. The month, which began on a Saturday, ended on a Monday after 31 days.This is an archived version of Wikipedia's Current events Portal from December 2012.edit sidebar
**Dubbing (filmmaking)**- Dubbing, mixing, or re-recording is a post-production process used in filmmaking and video production in which additional or supplementary recordings are "mixed" with original production sound to create the finished soundtrack.The process usually takes place on a dub stage. After sound editors edit and prepare all necessary tracks (dialogue, automated dialogue replacement (ADR), effects, Foley, and music), the dubbing mixer or mixers proceed to balance all of the elements and record the finis...

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