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Sesqui
Sesqui, Latin for ''one-and-one-half times'', may refer to: * Sodium sesquicarbonate, a double salt of sodium bicarbonate and sodium carbonate * Sesqui 1990, a 1990 festival in Wellington, New Zealand * Sesquialtera (other), several meanings *Sesquicentennial Exposition, a 1926 world's fair in Philadelphia, Pennsylvania, U.S. *Sesquilinear, a property of the dot product in complex, multi-dimensional spaces *Sesquiplane, a type of biplane where one wing is significantly smaller than the other See also *Number prefix Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example: * unicycle, bicycle, tricycle (1-cycle, 2-cycle, 3-cyc ...
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Sesquilinear
In mathematics, a sesquilinear form is a generalization of a bilinear form that, in turn, is a generalization of the concept of the dot product of Euclidean space. A bilinear form is linear in each of its arguments, but a sesquilinear form allows one of the arguments to be "twisted" in a semilinear manner, thus the name; which originates from the Latin numerical prefix ''sesqui-'' meaning "one and a half". The basic concept of the dot product – producing a scalar from a pair of vectors – can be generalized by allowing a broader range of scalar values and, perhaps simultaneously, by widening the definition of a vector. A motivating special case is a sesquilinear form on a complex vector space, . This is a map that is linear in one argument and "twists" the linearity of the other argument by complex conjugation (referred to as being antilinear in the other argument). This case arises naturally in mathematical physics applications. Another important case allows the scalars ...
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Sesquiplane
A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While a biplane wing structure has a structural advantage over a monoplane, it produces more drag than a monoplane wing. Improved structural techniques, better materials and higher speeds made the biplane configuration obsolete for most purposes by the late 1930s. Biplanes offer several advantages over conventional cantilever monoplane designs: they permit lighter wing structures, low wing loading and smaller span for a given wing area. However, interference between the airflow over each wing increases drag substantially, and biplanes generally need extensive bracing, which causes additional drag. Biplanes are distinguished from tandem wing arrangements, where the wings are placed forward and aft, instead of above and below. The term is also ...
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Sesquicentennial Exposition
The Sesqui-Centennial International Exposition of 1926 was a world's fair in Philadelphia, Pennsylvania. Its purpose was to celebrate the 150th anniversary of the signing of the United States Declaration of Independence, and the 50th anniversary of the 1876 Centennial Exposition. History Planning In 1916, the idea for a Sesquicentennial Exposition stemmed from the mind of John Wanamaker, who was the only living member of the Centennial Exposition's Finance Committee. At the time Philadelphia was a booming city, in terms of size and opportunity; however, it suffered from corruption on political and financial fronts. Wanamaker was well aware of the city's corruption, and believed a fair could redeem Philadelphia's reputation. He believed by hosting another world's fair, the restoration of the city's integrity, patriotism, and industry would emerge. By the end of August 1916, Wanamaker received the support of Howard French, the president of the Philadelphia Chamber of Com ...
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Sodium Sesquicarbonate
Sodium sesquicarbonate (systematic name: trisodium hydrogendicarbonate) Na3H(CO3)2 is a double salt of sodium bicarbonate and sodium carbonate (NaHCO3 · Na2CO3), and has a needle-like crystal structure. However, the term is also applied to an equimolar mixture of those two salts, with whatever water of hydration the sodium carbonate includes, supplied as a powder. The di hydrate, Na3H(CO3)2 · 2H2O, occurs in nature as the evaporite mineral trona. Due to concerns about the toxicity of borax which was withdrawn as a cleaning and laundry product, sodium sesquicarbonate is sold in the European Union (EU) as "Borax substitute". It is also known as one of the E number food additives E500. Uses Sodium sesquicarbonate is used in bath salts, swimming pools, as an alkalinity source for water treatment, and as a phosphate-free product replacing the trisodium phosphate for heavy duty cleaning. Sodium sesquicarbonate is used in the conservation of copper and copper alloy artifacts t ...
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Sesqui 1990
Sesqui 1990 was a festival that was staged in February 1990 in the city of Wellington, New Zealand. A spectacular commercial and administrative failure, the Sesqui event has subsequently become an icon of corporate mismanagement within New Zealand popular culture. History Billed by promoters as 'New Zealand's biggest event ever', the festival was staged in Wellington to mark the New Zealand sesquicentenary celebrations, the 150th anniversary of the 1840 signing of the Treaty of Waitangi. The event was a joint venture between the Wellington Show Association and the Wellington 1990 Trust, a well-funded regional organisation. The Wellington regional and city councils jointly underwrote this event by NZ$1.4 million. The Sesqui festival was planned to include a wide range of cultural, trade and scientific exhibits as well as entertainment events and funfair amusements. It was scheduled to run for six weeks and anticipated to attract 30,000 visitors per day, despite the fact tha ...
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Sesquialtera (other)
Sesquialtera ('one and a half') may refer to: * Sesquialterum in mathematics, the ratio 3:2, a superparticular ratio * Sesquialtera or the equivalent Greek term hemiola, three in the time of two as variously used in music theory: ** Sesquialtera commonly describes a tempo proportion in mensural notation ** Hemiola is more common for the temporary substitution of a 2+2+2 musical meter for 3+3 * Sesquialtera (organ stop) Sesquialtera ('one and a half') may refer to: * Sesquialterum in mathematics, the ratio 3:2, a superparticular ratio * Sesquialtera or the equivalent Greek term hemiola, three in the time of two as variously used in music theory: ** Sesquialtera ..., combining mutation ranks at 2' and 1', i.e. both 3:2 and 5:4 pitch ratios * ''Sesquialtera'' (moth), a genus of moth in the family Geometridae {{disambiguation ...
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