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K0 (other)
K0 may refer to: * Spectral class K0, a star spectral class * the 1965 first model of the Honda CB450 motorbike * the Grothendieck group in abstract algebra * the Lateral_earth_pressure#At_rest_pressure, Lateral earth pressure at rest * the neutral kaon, a strange meson with no charge in nuclear physics * K0 may refer to Khinchin's constant * K0 the Null graph#Order-zero graph, order-zero graph See also * * * KO (other) * 0K (other) {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectral Class
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] |
Honda CB450
The Honda CB450 is a standard motorcycle made by Honda from 1965 to 1974 with a 180° DOHC straight-twin engine. Producing 45 bhp (some 100 bhp/ litre), it was Honda's first "big" motorcycle, though it did not succeed in its goal of competing directly against the larger Triumphs, Nortons, and Harley-Davidsons in the North American market at the time. As a result, Honda tried again, leading to the development of the four cylinder Honda CB750 that marked a turning point for Honda and beginning of the "superbike" era of motorcycles. Design The CB450 had a distinctive chrome-sided fuel tank, and shared Honda's 'family' styling found elsewhere on the S90 and CD175. Early models were known as the 'Black Bomber', ''Motor Cycle'', 17 February 1966. Colour centrespread official Honda CB450 UK advertisement. "''Meet the big black bomber...''" "£360.0.0" Accessed 2013-08-22 or 'Dragon', but in Canada the K1 model was marketed as the 'Hellcat'. The four-speed K0 model was updated in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grothendieck Group
In mathematics, the Grothendieck group, or group of differences, of a commutative monoid is a certain abelian group. This abelian group is constructed from in the most universal way, in the sense that any abelian group containing a group homomorphism, homomorphic image (mathematics), image of will also contain a homomorphic image of the Grothendieck group of . The Grothendieck group construction takes its name from a specific case in category theory, introduced by Alexander Grothendieck in his proof of the Grothendieck–Riemann–Roch theorem, which resulted in the development of K-theory. This specific case is the monoid of isomorphism classes of object (category theory), objects of an abelian category, with the direct sum as its operation. Grothendieck group of a commutative monoid Motivation Given a commutative monoid , "the most general" abelian group that arises from is to be constructed by introducing inverse elements to all elements of . Such an abelian group always e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Earth Pressure
The lateral earth pressure is the pressure that soil exerts in the horizontal direction. It is important because it affects the consolidation behavior and strength of the soil and because it is considered in the design of geotechnical engineering structures such as retaining walls, basements, tunnels, deep foundations and braced excavations. The earth pressure problem dates from the beginning of the 18th century, when Gautier listed five areas requiring research, one of which was the dimensions of gravity-retaining walls needed to hold back soil. However, the first major contribution to the field of earth pressures was made several decades later by Coulomb,Coulomb C.A., (1776). Essai sur une application des regles des maximis et minimis a quelques problemes de statique relatifs a l'architecture. Memoires de l'Academie Royale pres Divers Savants, Vol. 7 who considered a rigid mass of soil sliding upon a shear surface. Rankine extended earth pressure theory by deriving a solution for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaon
In particle physics, a kaon, also called a K meson and denoted , is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark). Kaons have proved to be a copious source of information on the nature of fundamental interactions since their discovery by George Rochester and Clifford Butler at the Department of Physics and Astronomy, University of Manchester in cosmic rays in 1947. They were essential in establishing the foundations of the Standard Model of particle physics, such as the quark model of hadrons and the theory of quark mixing (the latter was acknowledged by a Nobel Prize in Physics in 2008). Kaons have played a distinguished role in our understanding of fundamental conservation laws: CP violation, a phenomenon generating the observed matter–antimatter asymmetry of the universe, was discovered in the kaon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter. Nuclear physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons. Discoveries in nuclear physics have led to applications in many fields such as nuclear power, nuclear weapons, nuclear medicine and magnetic resonance imaging, industrial and agricultural isotopes, ion implantation in materials engineering, and radiocarbon dating in geology and archaeology. Such applications are studied in the field of nuclear engineering. Particle physics evolved out of nuclear physics and the two fields are typically taught in close association. Nuclear astrophysics, the application of nuclear physics to astrophysics, is crucial in explaining the inner workings of stars and the origin of the chemical elements. History The history of nuclear physics as a discipline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khinchin's Constant
In number theory, Khinchin's constant is a mathematical constant related to the simple continued fraction expansions of many real numbers. In particular Aleksandr Yakovlevich Khinchin proved that for almost all real numbers ''x'', the coefficients ''a''''i'' of the continued fraction expansion of ''x'' have a finite geometric mean that is independent of the value of ''x.'' It is known as Khinchin's constant and denoted by ''K0.'' That is, for :x = a_0+\cfrac\; it is almost always true that :\lim_ \left( a_1 a_2 ... a_n \right) ^ = K_0. The decimal value of Khinchin's constant is given by: :K_0 = 2.68545\, 20010 \, 65306\, 44530 \dots Although almost all numbers satisfy this property, it has not been proven for ''any'' real number ''not'' specifically constructed for the purpose. The following numbers whose continued fraction expansions apparently do have this property (based on empirical data) are: * π * Roots of equations with a degree > 2, ''e.g.'' cubic roots and qua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Null Graph
In the mathematical field of graph theory, the term "null graph" may refer either to the order-zero graph, or alternatively, to any edgeless graph (the latter is sometimes called an "empty graph"). Order-zero graph The order-zero graph, , is the unique graph having no vertices (hence its order is zero). It follows that also has no edges. Thus the null graph is a regular graph of degree zero. Some authors exclude from consideration as a graph (either by definition, or more simply as a matter of convenience). Whether including as a valid graph is useful depends on context. On the positive side, follows naturally from the usual set-theoretic definitions of a graph (it is the ordered pair for which the vertex and edge sets, and , are both empty), in proofs it serves as a natural base case for mathematical induction, and similarly, in recursively defined data structures is useful for defining the base case for recursion (by treating the null tree as the child of missing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KO (other)
A KO is a knockout in various sports, such as boxing and martial arts. K.O., Ko or Kō may also refer to: Arts and entertainment Music * KO (musician), Canadian musician who plays a fusion of hip hop and folk music * ''K.O.'' (album), a 2021 album by Danna Paola * ''Ko'' (soundtrack), for the 2011 Indian film (see below) by Harris Jayaraj * K.O (rapper), South African rapper Ntokozo Mdluli * Karen O (born 1978), lead singer of the rock group Yeah Yeah Yeahs * Kevin Olusola, American cellist, beatboxer and member of ''a cappella'' group Pentatonix * K.O. (song), a song by Pabllo Vittar * ''K.O.'', a 2008 album by Rize * "K.O.", a 2004 song by Smujji Other media * Ko (Go), in the board game ''Go'' * ''Ko'' (film), a 2011 Indian Tamil-language action film by K. V. Anand * '' Knight Online'', a 2004 online role-playing game Language * Ko language * Ko (kana), the romanization of the Japanese kana こ and コ * ISO 639-1 code for the Korean language Surname * Ko (Kore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
