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M-type Main-sequence Stars
Type M or M type may refer to: Science and technology * Type M, a xD-Picture Card * Type M, a name for the 15 amp BS 546 electrical plug * Vaio Type M, a kind of Vaio computer from Sony * M-type asteroid M-type (aka M-class) asteroids are a spectral class of asteroids which appear to contain higher concentrations of metal phases (e.g. iron-nickel) than other asteroid classes, and are widely thought to be the source of iron meteorites. Definition ... * m-type filter, an electronic filter * M-type star * M-types, an implementation of inductive type Other uses * Audi Type M, a 1920s car * Beretta 92FS Compact Type M, a pistol * MG M-type, a sports car See also * M class (other) * Class M (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XD-Picture Card
The xD-Picture Card is an obsolete form of flash memory card, used in digital cameras made by Olympus and Fujifilm during the 2000s. The xD in the xD-Picture Card stands for eXtreme Digital. xD cards were manufactured with capacities of 16 MB up to 2 GB. The standard was phased out in the late 2000s in favour of the SD card, which had been its primary competitor. History The cards were developed by Olympus and Fujifilm, and introduced into the market in July 2002. Toshiba Corporation and Samsung Electronics manufactured the cards for Olympus and Fujifilm. xD cards were sold under other brands, including Kodak, SanDisk, PNY, and Lexar, but were not branded with the respective companies' logos, except for Kodak. Previously, xD competed primarily with Secure Digital (SD) cards, CompactFlash (CF), and Sony's Memory Stick. Because of its higher cost and limited usage in products other than digital cameras, xD lost ground to SD, which is broadly used by cellular phone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British And Related Types
British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies. ** Britishness, the British identity and common culture * British English, the English language as spoken and written in the United Kingdom or, more broadly, throughout the British Isles * Celtic Britons, an ancient ethno-linguistic group * Brittonic languages, a branch of the Insular Celtic language family (formerly called British) ** Common Brittonic, an ancient language Other uses *''Brit(ish)'', a 2018 memoir by Afua Hirsch *People or things associated with: ** Great Britain, an island ** United Kingdom, a sovereign state ** Kingdom of Great Britain (1707–1800) ** United Kingdom of Great Britain and Ireland (1801–1922) See also * Terminology of the British Isles * Alternative names for the British * English (other) * Britannic (other) * British Isles * Brit (other) * Briton (d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M-type Asteroid
M-type (aka M-class) asteroids are a spectral class of asteroids which appear to contain higher concentrations of metal phases (e.g. iron-nickel) than other asteroid classes, and are widely thought to be the source of iron meteorites. Definition Asteroids are classified as M-type based upon their generally featureless and flat to red-sloped absorption spectra in the visible to near-infrared and their moderate optical albedo. Along with the spectrally similar E-type and P-type asteroids (both categories E and P were formerly type-M in older systems), they are included in the larger X-type asteroid group and are distinguishable only by optical albedo: : Characteristics Composition Although widely assumed to be metal-rich (the reason for use of "M" in the classification), the evidence for a high metal content in the M-type asteroids is only indirect, though highly plausible. Their spectra are similar to those of iron meteorites and enstatite chondrites, and radar observations ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M-type Filter
m-derived filters or m-type filters are a type of electronic filter designed using the image method. They were invented by Otto Zobel in the early 1920s. This filter type was originally intended for use with telephone multiplexing and was an improvement on the existing constant k type filter. The main problem being addressed was the need to achieve a better match of the filter into the terminating impedances. In general, all filters designed by the image method fail to give an exact match, but the m-type filter is a big improvement with suitable choice of the parameter m. The m-type filter section has a further advantage in that there is a rapid transition from the cut-off frequency of the passband to a pole of attenuation just inside the stopband. Despite these advantages, there is a drawback with m-type filters; at frequencies past the pole of attenuation, the response starts to rise again, and m-types have poor stopband rejection. For this reason, filters designed using m-ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M-type Star
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element or molecule, with the line strength indicating the abundance of that element. The strengths of the different spectral lines vary mainly due to the temperature of the photosphere, although in some cases there are true abundance differences. The ''spectral class'' of a star is a short code primarily summarizing the ionization state, giving an objective measure of the photosphere's temperature. Most stars are currently classified under the Morgan–Keenan (MK) system using the letters ''O'', ''B'', ''A'', ''F'', ''G'', ''K'', and ''M'', a sequence from the hottest (''O'' type) to the coolest (''M'' type). Each letter class is then subdivided ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inductive Type
In type theory, a system has inductive types if it has facilities for creating a new type from constants and functions that create terms of that type. The feature serves a role similar to data structures in a programming language and allows a type theory to add concepts like numbers, relations, and trees. As the name suggests, inductive types can be self-referential, but usually only in a way that permits structural recursion. The standard example is encoding the natural numbers using Peano's encoding. Inductive nat : Type := , 0 : nat , S : nat -> nat. Here, a natural number is created either from the constant "0" or by applying the function "S" to another natural number. "S" is the successor function which represents adding 1 to a number. Thus, "0" is zero, "S 0" is one, "S (S 0)" is two, "S (S (S 0))" is three, and so on. Since their introduction, inductive types have been extended to encode more and more structures, while still being predicative and supporti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audi Type M
The Audi Type M was a large car first presented at the Berlin Motor Show in 1923 and produced by Audi between 1924 and 1927. The vehicle had a six-cylinder in-line engine with 4,655 cc of displacement. The engine incorporated several innovative features including overhead valves. It developed a maximum of at 3,000 rpm. Power was transmitted to the rear wheels through a four-speed transmission. The engine had an eight-bearing crankshaft, forced lubrication with oil cooler and a thermostat-controlled water cooling. The car had two leaf-sprung solid axles and four wheel hydraulic brakes. It was the first Audi with four-wheel brakes. The Type M's first presentation, at the 1923 Motor Show, was accompanied by a press release which boasted that "Audi is one of those German automakers that believes doing the job properly is more important than price" („''Die Audi-Werke zählen zu jenen deutschen Automobilfabriken, welche die Preisfrage hinter die konstruktive Aufgabe zurückstellen''â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beretta 92FS Compact Type M
The Beretta 92 (also Beretta 96 and Beretta 98) is a series of semi-automatic pistols designed and manufactured by Beretta of Italy. The Beretta 92 was designed in 1975, and production began in 1976. Many variants in several different calibers continue to be used to the present. The United States military replaced the .45 ACP M1911A1 pistol in 1985 with the Beretta 92FS, designated as the " M9." History The Beretta 92 pistol evolved from earlier Beretta designs, most notably the M1923 and M1951. From the M1923 comes the open slide design, while the alloy frame and locking block barrel, originally from Walther P38, were first used in the M1951. The grip angle and the front sight integrated with the slide were also common to earlier Beretta pistols. What were perhaps the Model 92's two most important advanced design features had first appeared on its immediate predecessor, the 1974 .380 caliber Model 84. These improvements both involved the magazine, which featured direct feed; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MG M-type
The MG M-type (also known as the MG Midget) is a sports car that was produced by the MG Cars from April 1929 until 1932. It was sometimes referred to as the 8/33. Launched at the 1928 London Motor Show when the sales of the larger MG saloons was faltering because of the economic climate, the small car brought MG ownership to a new sector of the market and probably saved the company. Early cars were made in the Cowley factory, but from 1930 production had transferred to Abingdon. Sports car The M-Type was one of the first genuinely affordable sports cars to be offered by an established manufacturer, as opposed to modified versions of factory-built saloon cars and tourers. By offering a car with excellent road manners and an entertaining driving experience at a low price (the new MG cost less than double the cheapest version of the Morris Minor on which it was based) despite relatively low overall performance the M-type set the template for many of the MG products that were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M Class (other)
M class or M-class may refer to: Military * M-class cruiser, a planned German light cruiser class * M-class destroyer, several classes of destroyer ** Admiralty M-class destroyer, a class of British destroyers built 1913–1916 and served in World War I ** M-class, British destroyers starting with the letter ''M'' of the L and M-class destroyer, launched 1939–1942 and served in World War II ** ''MarcÃlio Dias''-class destroyer, Brazilian destroyers built during World War II * ''Karel Doorman''-class frigate, of the Royal Netherlands Navy * M-class minesweeper, several classes of minesweeper ** M-class minesweeper (Germany), a class of minesweepers of the World War II German ''Kriegsmarine'' ** M-class minesweeper (Netherlands), a class of minesweepers of the Royal Netherlands Navy built after World War I * ''Abercrombie''-class monitor, a British WWI class of monitor gunships * M-class submarine, several classes of submarine ** British M-class submarine ** United States M-c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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