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Ddm Original Logo
DDM may refer to: Computing * Data Diffusion Machine, a virtual shared memory computer architecture from the 1990s * Digital diagnostics monitoring function in SFP transceivers * Distributed Data Management Architecture, an open, published architecture for creating, managing and accessing data on a remote computer. * Dynamic Data Masking, a form of data masking * Dynamic Device Mapping, an advanced technology for USB KVM switches Science and technology * Derrick Drilling Machine, or Top drive * Difference in the Depth of Modulation, an amplitude modulation method used in the Instrument Landing System * Differential dynamic microscopy, an optical technique * Direct Digital Manufacturing * Doctor of Dental Medicine, an academic degree for dentistry * Domain decomposition methods * Drift Diffusion Model, a method used in psychological choice testing * Maltosides (n-Dodecyl β-D-Maltopyranoside), a detergent used when purifying membrane proteins * Dyson Digital Motor, a two-pole s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-alternative Forced Choice
Two-alternative forced choice (2AFC) is a method for measuring the sensitivity of a person, child or infant, or animal to some particular sensory input, stimulus, through that observer's pattern of choices and response times to two versions of the sensory input. For example, to determine a person's sensitivity to dim light, the observer would be presented with a series of trials in which a dim light was randomly either in the top or bottom of the display. After each trial, the observer responds "top" or "bottom". The observer is not allowed to say "I do not know", or "I am not sure", or "I did not see anything". In that sense the observer's choice is forced between the two alternatives. Both options can be presented concurrently (as in the above example) or sequentially in two intervals (also known as two-interval forced choice, 2IFC). For example, to determine sensisitivity to a dim light in a two-interval forced choice procedure, an observer could be presented with series of trials ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trains In The Netherlands
The following are current and former trains in the Netherlands. In use Diesel locomotives * 600 Class: Traditional shunter used in the Netherlands & UK. They are still used at Crailoo (between Bussum and Hilversum) by Railpro. * V60D: Ex Czech Railways shunting locomotives. * V 100: Ex German locomotives operated by VolkerRail, Shunter, Rotterdam Rail Feeding and Spitzke. * 700 Class: Vossloh G400B locomotives in use by Nederlandse Spoorwegen * 2200 Class: Ex NS locomotive used by Eurailscout to inspect the track * 6400 Class: A locomotive used for both shunting and pulling trains by DB Cargo. Some are permitted to operate in Belgium (called "Vlaamse Reuzen") and some in Germany (called "Duitse Herders"). Many are sold abroad. * Class 66: European version of the UK Class 66 locomotives used by various freight companies. * Vossloh G1206: Locomotives used by a number of private freight and infrastructure companies. * Vossloh G2000 BB: Locomotives used by RheinCargo, Rotterd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didymoteicho
Didymoteicho ( el, Διδυμότειχο, Didymóteicho ) is a city located on the eastern edge of the Evros regional unit of Eastern Macedonia and Thrace, in northeastern Greece. It is the seat of the municipality of the same name. The town (pop. 9,263 in 2011) sits on a plain and located south east of Svilengrad, south of Edirne, Turkey and Orestiada, west of Uzunköprü, Turkey, about 20 km north of Soufli and about 90 km north of Alexandroupoli. The municipality of Didymóteicho has a land area of 565.4 km² and a population of 19,493 inhabitants. Name "Didymoteicho" is the modern Greek form of , ''Didymóteichon'', from , ''dídymos'', "twin" and , ''teîchos'', "wall". The name first appears in 591/592, and most resulted from the refortification of the city under Justinian I (see below). The corrupted short form ''Dimotica'' or ''Demotica'' or variants thereof are attested in Western languages since the late 12th century (early forms ''Timoticon'', ''D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dharma Drum Mountain
Dharma Drum Mountain (DDM; ) is an international Buddhist spiritual, cultural, and educational foundation founded by late Chan master Sheng-yen (1931 – 2009). The center focuses on educating the public in Buddhism with the goal of improving the world and establishing a "Pure Land on Earth" through Buddhist education. The international headquarters of this organization is located at Jinshan District, New Taipei City, Taiwan. Dharma Drum Mountain is one of the most influential Buddhist organizations in Chinese Buddhism. In Taiwan, Master Sheng-yen was considered one of the "Four Heavenly Kings" and Dharma Drum Mountain one of the " Four Great Mountains" or four major Buddhist organizations of Taiwanese Buddhism, along with Tzu Chi, Fo Guang Shan, and Chung Tai Shan. History Long before the establishment of the Jinshan headquarters, the development of Dharma Drum originated in the Chung-Hwa Institute of Buddhist Culture (CHIBC) and Nung Chan Monastery. Both were founded by Don ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Steam Locomotive Museum
The German Steam Locomotive Museum (''Deutsches Dampflokomotiv-Museum'') or DDM is located at the foot of the famous ''Schiefe Ebene'' ramp on the Ludwig South-North Railway in Neuenmarkt, Upper Franconia. This region is in northern Bavaria, Germany. The DDM was founded in 1977. Facilities The museum is in the former locomotive shed (''Bahnbetriebswerk'') at Neuenmarkt- Wirsberg station. It comprises a 15-road roundhouse, water cranes, a turntable with an off-centre pivot, a coaling facility and a ''Ruge'' coal crane in a newly built 'old fashioned' working coal yard. History The locomotive shed was built in 1895 by the Royal Bavarian State Railways and extended in 1923 by the Deutsche Reichsbahn. Amongst others, pusher locomotives e. g. DRG Class 95s (ex-Prussian T 20s) and Class 96s (ex-Bavarian Gt 2x4/4 Mallet locomotives) were stationed there. One example of a Class 95 may be seen in the museum. Locomotives Around 30 steam locomotives may be seen, including a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East German Mark
The East German mark (german: Mark der DDR ), commonly called the eastern mark (german: Ostmark, links=no ) in West Germany and after reunification), in East Germany only ''Mark'', was the currency of the German Democratic Republic (East Germany). Its ISO 4217 currency code was DDM. The currency was known officially as the ''Deutsche Mark'' from 1948 to 1964, ''Mark der Deutschen Notenbank'' from 1964 to 1967, and from 1968 to 1990 as the ''Mark der DDR'' (Mark of the GDR). The mark (M) was divided into 100 Pfennig (pf). History 1948 On 18 June 1948 a currency reform was announced for the western zones. Subsequently, on 20 June 1948, the reichsmark and the rentenmark were abolished in the western occupation zones due to Soviet counterfeiting of '' AM-Marks'' resulting in economic instability and inflation and replaced with the ''Deutsche Mark'' issued by the ''Bank deutscher Länder'' (later the Deutsche Bundesbank). Because the ''Reichsmark'' was still legal tender in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dividend Discount Model
In finance and investing, the dividend discount model (DDM) is a method of valuing the price of a company's stock based on the fact that its stock is worth the sum of all of its future dividend payments, discounted back to their present value. In other words, DDM is used to value stocks based on the net present value of the future dividends. The constant-growth form of the DDM is sometimes referred to as the Gordon growth model (GGM), after Myron J. Gordon of the Massachusetts Institute of Technology, the University of Rochester, and the University of Toronto, who published it along with Eli Shapiro in 1956 and made reference to it in 1959. Their work borrowed heavily from the theoretical and mathematical ideas found in John Burr Williams 1938 book "The Theory of Investment Value," which put forth the dividend discount model 18 years before Gordon and Shapiro. When dividends are assumed to grow at a constant rate, the variables are: P is the current stock price. g is the constant gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reluctance Motor
A reluctance motor is a type of electric motor that induces non-permanent magnetic poles on the ferromagnetic rotor. The rotor does not have any windings. It generates torque through magnetic reluctance. Reluctance motor subtypes include synchronous, variable, Switched reluctance motor, switched and variable stepping. Reluctance motors can deliver high power density at low cost, making them attractive for many applications. Disadvantages include high torque ripple (the difference between maximum and minimum torque during one revolution) when operated at low speed, and noise due to torque ripple. Until the early twenty-first century, their use was limited by the complexity of designing and controlling them. Advances in theory, computer design tools, and low-cost embedded systems for control overcame these obstacles. Microcontrollers use real-time computing control algorithms to tailor drive waveforms according to rotor position and current/voltage feedback. Before the development ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maltosides
A maltoside is a glycoside with maltose as the glycone (sugar) functional group. Among the most common are alkyl maltosides, which contain hydrophobic alkyl chains as the aglycone. Given their amphoteric properties, these comprise a class of detergents, where variation in the alkyl chain confers a range of detergent properties including Critical micelle concentration, CMC and solubility. Maltosides are most often used for the solubilization and purification of membrane proteins. History In 1980 Ferguson-Miller ''et al.'' at Michigan State developed ''n''-dodecyl-β-D-maltopyranoside (DDM) as part of a successful effort to purify an active, stable, monodisperse form of cytochrome c oxidase. Maltosides have been used extensively to stabilize membrane proteins for biophysical and structural studies. Table of detergent properties References {{Reflist Disaccharides Reagents for biochemistry Non-ionic surfactants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Domain Decomposition Methods
In mathematics, numerical analysis, and numerical partial differential equations, domain decomposition methods solve a boundary value problem by splitting it into smaller boundary value problems on subdomains and iterating to coordinate the solution between adjacent subdomains. A coarse problem with one or few unknowns per subdomain is used to further coordinate the solution between the subdomains globally. The problems on the subdomains are independent, which makes domain decomposition methods suitable for parallel computing. Domain decomposition methods are typically used as preconditioners for Krylov space iterative methods, such as the conjugate gradient method, GMRES, and LOBPCG. In overlapping domain decomposition methods, the subdomains overlap by more than the interface. Overlapping domain decomposition methods include the Schwarz alternating method and the additive Schwarz method. Many domain decomposition methods can be written and analyzed as a special case of the abstr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Form-factor Pluggable Transceiver
Small Form-factor Pluggable connected to a pair of fiber-optic cables Small Form-factor Pluggable (SFP) is a compact, hot-pluggable network interface module format used for both telecommunication and data communications applications. An SFP interface on networking hardware is a modular slot for a media-specific transceiver, such as for a fiber-optic cable or a copper cable. The advantage of using SFPs compared to fixed interfaces (e.g. modular connectors in Ethernet switches) is that individual ports can be equipped with different types of transceiver as required. The form factor and electrical interface are specified by a multi-source agreement (MSA) under the auspices of the Small Form Factor Committee. The SFP replaced the larger gigabit interface converter (GBIC) in most applications, and has been referred to as a Mini-GBIC by some vendors. SFP transceivers exist supporting synchronous optical networking (SONET), Gigabit Ethernet, Fibre Channel, PON, and other c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
