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Doublet Earthquakes
Doublet is a word derived from the Latin ''duplus'', "twofold, twice as much", and is used to indicate a pair of identical, similar, or related things. Doublet may refer to: Apparel *, a man's snug-fitting buttoned jacket that was worn from the late 14th century to the mid 17th century *, a formal jacket worn with Scottish highland dressGames *[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (clothing)
A doublet (/ˈdʌblɪt/; derived from the Ital. ''giubbetta'') is a man's snug-fitting jacket that is shaped and fitted to the man's body. The garment was worn in Spain, and spread to the rest of Western Europe, from the late Middle Ages up to the mid-17th century. The doublet was hip length or waist length and worn over the shirt or drawers. Until the end of the 15th century, the doublet was usually worn under another layer of clothing such as a gown, mantle, overtunic or jerkin when in public. Originally it was a mere stitched and quilted lining ("doubling"), worn under a hauberk or cuirass to prevent bruising and chafing. Doublets were sometimes opened to the waistline in a deep V. The edges might be left free or laced across the shirt front. If there was space left it might be filled with a stomacher. By the 1520s, the edges of the doublet more frequently met at the center front. Then, like many other originally practical items in the history of men's wear, from the late 15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimeresia
''Dimeresia'' is a monotypic genus in the sunflower family containing the single species ''Dimeresia howellii'', known by the common name doublet. Distribution This uncommon plant is endemic to an area of the Great Basin region in the western United States, in northeastern California, southeastern Oregon, southwestern Idaho, and northwestern Nevada. It grows in dry volcanic soils, primarily on the Modoc Plateau __NOTOC__ The Modoc Plateau lies in the northeast corner of California as well as parts of Oregon and Nevada. Nearly of the Modoc National Forest are on the plateau between the Medicine Lake Highlands in the west and the Warner Mountains in the ... volcanic plain, at elevations of . Description ''Dimeresia howellii'' is a very tiny annual flowering plant rarely exceeding 4 centimeters in height or width. It forms a small tuft on the ground with several oval-shaped leaves, and is cobwebby at base and glandular above. The inflorescence has tiny white to purple bell-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Textual Criticism
Textual criticism is a branch of textual scholarship, philology, and of literary criticism that is concerned with the identification of textual variants, or different versions, of either manuscripts or of printed books. Such texts may range in dates from the earliest writing in cuneiform, impressed on clay, for example, to multiple unpublished versions of a 21st-century author's work. Historically, scribes who were paid to copy documents may have been literate, but many were simply copyists, mimicking the shapes of letters without necessarily understanding what they meant. This means that unintentional alterations were common when copying manuscripts by hand. Intentional alterations may have been made as well, for example, the censoring of printed work for political, religious or cultural reasons. The objective of the textual critic's work is to provide a better understanding of the creation and historical transmission of the text and its variants. This understanding may lead to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (lapidary)
A doublet is a type of assembled gem composed in two sections. It is sometimes used to imitate other, more expensive gems. A garnet and glass doublet uses a top portion of natural garnet fused to any color of glass to imitate a gem. The color of glass used in the doublet is all that is seen, as the garnet provides no color. If seen in reflected light, a separation line may be seen. A harder garnet makes the stones more durable. In the case of opal Opal is a hydrated amorphous form of silica (SiO2·''n''H2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline form ... doublets, a backing layer of onyx or matrix (ironstone) gives the more fragile opal layer support and can make the opal look darker and higher quality. Garnet and glass doublets were first used around 1850 when it was noted that molten glass would adhere to garnet. It was a popular imi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (horse)
Doublet (b. 1963 - †.1974) was a Thoroughbred cross gelding. Doublet was a successful performer in the sport of Eventing, in which he was the regular mount of Princess Anne. Doublet was ridden by Princess Anne when winning the gold medal in the 1971 European Eventing Championship. Beginning Doublet was a gelding presented to Princess Anne, Princess Royal, as a gift from her mother, Queen Elizabeth II.Boca Raton News He was sired by the Argentinian Thoroughbred stallion Doubtless out of a non-Thoroughbred mare named Swaté. Activity His trainer was Alison Oliver. On 27 March 1971, the gelding threw the Princess Royal. He won gold at the European three-day eventing championships, in Burghley with Princess Anne on 4 September 1971, and finished fifth at the Badminton Horse Trials in the same year. Was in Kiev in 1973, later suffering ailments. Death On May 13, 1974, while training on the grounds of Windsor Castle, Doublet suffered a broken leg. His life was humanely ended.Hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unit Doublet
In mathematics, the unit doublet is the derivative of the Dirac delta function. It can be used to differentiate signals in electrical engineering: If ''u''1 is the unit doublet, then : (x * u_1)(t) = \frac where * is the convolution In mathematics (in particular, functional analysis), convolution is a mathematical operation on two functions ( and ) that produces a third function (f*g) that expresses how the shape of one is modified by the other. The term ''convolution'' ... operator. The function is zero for all values except zero, where its behaviour is interesting. Its integral over any interval enclosing zero is zero. However, the integral of its absolute value over any region enclosing zero goes to infinity. The function can be thought of as the limiting case of two rectangles, one in the second quadrant, and the other in the fourth. The length of each rectangle is k, whereas their breadth is 1/k2, where k tends to zero. References Generalized functions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet State
In quantum mechanics, a doublet is a composite quantum state of a system with an effective spin of 1/2, such that there are two allowed values of the spin component, −1/2 and +1/2. Quantum systems with two possible states are sometimes called two-level systems. Essentially all occurrences of doublets in nature arise from rotational symmetry; spin 1/2 is associated with the fundamental representation of the Lie group SU(2). History and applications The term "doublet" dates back to the 19th century, when it was observed that certain spectral lines of an ionized, excited gas would split into two under the influence of a strong magnetic field, in an effect known as the anomalous Zeeman effect. Such spectral lines were observed not only in the laboratory, but also in astronomical spectroscopy observations, allowing astronomers to deduce the existence of, and measure the strength of magnetic fields around the sun, stars and galaxies. Conversely, it was the observation of doublets in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet Earthquake
__NOTOC__ In seismology, doublet earthquakes – and more generally, multiplet earthquakes – were originally identified as multiple earthquakes with nearly identical waveforms originating from the same location. They are now characterized as single earthquakes having two (or more) main shocks of similar magnitude, sometimes occurring within tens of seconds, but sometimes separated by years. The similarity of magnitude – often within 0.4 magnitude – distinguishes multiplet events from aftershocks, which start at about 1.2 magnitude less than the parent shock ( Båth's law) and decrease in magnitude and frequency according to known laws. Doublet/multiplet events also have nearly identical seismic waveforms, as they come from the same rupture zone and stress field, whereas aftershocks, being peripheral to the main rupture, typically reflect more diverse circumstances of origin. Multiplet events overlap in their focal fields (rupture zones), which can be up 100 kilometers across ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (potential Flow)
In fluid dynamics, potential flow (or ideal flow) describes the velocity field as the gradient of a scalar function: the velocity potential. As a result, a potential flow is characterized by an irrotational velocity field, which is a valid approximation for several applications. The irrotationality of a potential flow is due to the curl of the gradient of a scalar always being equal to zero. In the case of an incompressible flow the velocity potential satisfies Laplace's equation, and potential theory is applicable. However, potential flows also have been used to describe compressible flows. The potential flow approach occurs in the modeling of both stationary as well as nonstationary flows. Applications of potential flow are for instance: the outer flow field for aerofoils, water waves, electroosmotic flow, and groundwater flow. For flows (or parts thereof) with strong vorticity effects, the potential flow approximation is not applicable. Characteristics and applications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (Highland Dress)
Doublet is the term describing any of several types of jacket worn with Scottish highland dress; referring to both uniform and evening jackets. Uniform doublets are found in a number of different styles. Commonly they are short cut with four Inverness flaps skirt and buttoned Gauntlet (glove), gauntlet cuffs. It can be any colour depending upon the regiment. It is also used by civilian pipe bands. Formal jackets As with both uniform doublets and civilian dress, there are a number of styles of jacket or doublet suitable for wear with highland dress. Kinloch Anderson, one of the older makers of highland dress in Scotland, considers the "Coatee and Vest" (often called the Prince Charlie Jacket), Argyll Jacket, Regulation Doublet, Montrose Doublet, Sheriffmuir Jacket or Kenmore jacket" suitable for "black tie" evening wear, with all except the Argyll Jacket also considered acceptable for "white tie" events. The Argyll jacket and tweed jackets are appropriate for day wear. Diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (linguistics)
In etymology, two or more words in the same language are called doublets or etymological twins or twinlings (or possibly triplets, and so forth) when they have different phonological forms but the same etymological root. Often, but not always, the words entered the language through different routes. Given that the kinship between words that have the same root and the same meaning is fairly obvious, the term is mostly used to characterize pairs of words that have diverged at least somewhat in meaning. For example, English ''pyre'' and ''fire'' are doublets with merely associated meanings despite both descending ultimately from the same Proto-Indo-European (PIE) word *'. Words with similar meanings but subtle differences contribute to the richness of modern English, and many of these are doublets. A good example consists of the doublets ''frail'' and ''fragile''. (These are both ultimately from the Latin adjective ', but ''frail'' evolved naturally through its slowly changing forms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doublet (lens)
In optics, a doublet is a type of lens made up of two simple lenses paired together. Such an arrangement allows more optical surfaces, thicknesses, and formulations, especially as the space between lenses may be considered an "element". With additional degrees of freedom, optical designers have more latitude to correct more optical aberrations more thoroughly. Types Doublets can come in many forms, though most commercial doublets are achromats, which are optimized to reduce chromatic aberration while also reducing spherical aberration and other optical aberrations. The lenses are made from glasses with different refractive indices and different amounts of dispersion. Often one element is made from crown glass and the other from flint glass. This combination produces a better image than a simple lens. Some Trilobites, which are now extinct, had natural doublet lenses in their eyes. Apochromats can also be made as doublets. Doublets can be air-spaced, cemented, or "oiled". Oi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
