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G0 (other)
G0, G0, G0, g0, or G-zero, may refer to: Science * G0 phase of cell division * G0 star, a subclass of G- class stars * Conductance quantum ("quantum of conductance"), notated G0 * Geometric continuity, notated G0 * Group 0, an alternate name for Group 18 of the Periodic table – the Noble gases ** G0, a hypothetical group in the Periodic table, which would consist of neutronium * Standard gravity, notated g0 Other uses * G0, abbreviation for ground zero * G0, the name of the musical note G in octave 0 * G-Zero world – the term used for the emerging power vacuum in international politics in the early 21st Century * Ghana International Airlines, IATA airline designator G0 * G0, a block of character codes in the Teletext character set See also * 0G (other) * Go (other) Go, GO, G.O., or Go! may refer to: Arts and entertainment Games and sport * Go (game), a board game for two players * '' Travel Go'' (formerly ''Go – The International Travel Game''), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G0 Phase
The G0 phase describes a cellular state outside of the replicative cell cycle. Classically, cells were thought to enter G0 primarily due to environmental factors, like nutrient deprivation, that limited the resources necessary for proliferation. Thus it was thought of as a ''resting phase''. G0 is now known to take different forms and occur for multiple reasons. For example, most adult neuronal cells, among the most metabolically active cells in the body, are fully differentiated and reside in a terminal G0 phase. Neurons reside in this state, not because of stochastic or limited nutrient supply, but as a part of their developmental program. G0 was first suggested as a cell state based on early cell cycle studies. When the first studies defined the four phases of the cell cycle using radioactive labeling techniques, it was discovered that not all cells in a population proliferate at similar rates. A population's “growth fraction” – or the fraction of the population that w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stellar Classification
In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grating into a spectrum exhibiting the Continuum (spectrum), 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 coo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conductance Quantum
The conductance quantum, denoted by the symbol , is the quantized unit of electrical conductance. It is defined by the elementary charge ''e'' and Planck constant ''h'' as: :G_0 = \frac = It appears when measuring the conductance of a quantum point contact, and, more generally, is a key component of the Landauer formula, which relates the electrical conductance of a quantum conductor to its quantum properties. It is twice the reciprocal of the von Klitzing constant (2/''R''K). Note that the conductance quantum does not mean that the conductance of any system must be an integer multiple of ''G''0. Instead, it describes the conductance of two quantum channels (one channel for spin up and one channel for spin down) if the probability for transmitting an electron that enters the channel is unity, i.e. if transport through the channel is ballistic. If the transmission probability is less than unity, then the conductance of the channel is less than ''G''0. The total conductance of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geometric Continuity
In mathematical analysis, the smoothness of a function is a property measured by the number of continuous derivatives it has over some domain, called ''differentiability class''. At the very minimum, a function could be considered smooth if it is differentiable everywhere (hence continuous). At the other end, it might also possess derivatives of all orders in its domain, in which case it is said to be infinitely differentiable and referred to as a C-infinity function (or C^ function). Differentiability classes Differentiability class is a classification of functions according to the properties of their derivatives. It is a measure of the highest order of derivative that exists and is continuous for a function. Consider an open set U on the real line and a function f defined on U with real values. Let ''k'' be a non-negative integer. The function f is said to be of differentiability class ''C^k'' if the derivatives f',f'',\dots,f^ exist and are continuous on U. If f is k-di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Group 0
The noble gases (historically also the inert gases; sometimes referred to as aerogens) make up a class of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity. The six naturally occurring noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). Oganesson (Og) is a synthetically produced highly radioactive element. Although IUPAC has used the term "noble gas" interchangeably with "group 18" and thus included oganesson, it may not be significantly chemically noble and is predicted to break the trend and be reactive due to relativistic effects. Because of the extremely short 0.7 ms half-life of its only known isotope, its chemistry has not yet been investigated. For the first six periods of the periodic table, the noble gases are exactly the members of group 18. Noble gases are typically highly unreactive except when un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutronium
Neutronium (sometimes shortened to neutrium, also referred to as neutrite) is a hypothetical substance composed purely of neutrons. The word was coined by scientist Andreas von Antropoff in 1926 (before the 1932 discovery of the neutron) for the hypothetical "element of atomic number zero" (with zero protons in its nucleus) that he placed at the head of the periodic table (denoted by -, or Nu). However, the meaning of the term has changed over time, and from the last half of the 20th century onward it has been also used to refer to extremely dense substances resembling the neutron-degenerate matter theorized to exist in the cores of neutron stars; hereinafter "''degenerate'' neutronium" will refer to this. In neutron stars Neutronium is used in popular physics literature to refer to the material present in the cores of neutron stars (stars which are too massive to be supported by electron degeneracy pressure and which collapse into a denser phase of matter). This term is very rar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Gravity
The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by or , is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is defined by standard as . This value was established by the 3rd CGPM (1901, CR 70) and used to define the standard weight of an object as the product of its mass and this nominal acceleration. The acceleration of a body near the surface of the Earth is due to the combined effects of gravity and centrifugal acceleration from the rotation of the Earth (but the latter is small enough to be negligible for most purposes); the total (the apparent gravity) is about 0.5% greater at the poles than at the Equator. Although the symbol is sometimes used for standard gravity, (without a suffix) can also mean the local acceleration due to local gravity and centrifugal acceleration, which varies depending on one's position on Earth (see Earth's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Zero
In relation to nuclear explosions and other large bombs, ground zero (also called surface zero) is the point on the Earth's surface closest to a detonation. In the case of an explosion above the ground, ''ground zero'' is the point on the ground directly below the nuclear detonation and is sometimes called the hypocenter (). Generally, the terms ''ground zero'' and ''surface zero'' are also used in relation to earthquakes, epidemics, and other disasters to mark the point of the most severe damage or destruction. The term is distinguished from the term zero point in that the latter can also be located in the air, underground, or underwater. Trinity, Hiroshima and Nagasaki The origins of the term "ground zero" began with the Trinity (nuclear test), Trinity test in Jornada del Muerto, Jornada del Muerto desert near Socorro, New Mexico, and the atomic bombings of Hiroshima and Nagasaki in Japan. The United States Strategic Bombing Survey of the atomic attacks, released in June 194 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G (musical Note)
Sol, so, or G is the fifth note of the fixed-do solfège starting on C. It is the fifth note and the eighth semitone of the solfège. As such it is the dominant, a perfect fifth above C or perfect fourth below C. When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle G (G4) note is approximately 391.995 Hz. See pitch for a discussion of historical variations in frequency. It has enharmonic equivalents of F (F-double sharp) and A (A-double flat). Designation by octave Scales Common scales beginning on G * G major: G A B C D E F G * G natural minor: G A B C D E F G * G harmonic minor: G A B C D E F G * G melodic minor ascending: G A B C D E F G * G melodic minor descending: G F E D C B A G Diatonic scales * G Ionian: G A B C D E F G * G Dorian: G A B C D E F G * G Phrygian: G A B C D E F G * G Lydian: G A B C D E F G * G Mixolydian: G A B C D E F G * G Aeolian: G A B C D E F G * G Locrian: G A B C D E F G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G-Zero World
''Every Nation for Itself: Winners and Losers in a G-Zero World'' is a 2012 non-fiction book by Ian Bremmer that explains the growing "G-Zero" power vacuum in international politics as no country or group of countries has the political and economic leverage to drive an international agenda or provide global public goods. The book gives a historical summary of the global political order and American role in world affairs from the post-World War II establishment of the Bretton Woods system up through the present day. It outlines the various tolls that the G-Zero will exact, potential winners and losers in such an environment, and makes predictions as to what kind of political order will succeed the G-Zero. Overview "G-Zero" is a reference to a perceived shift away from the preeminence of the Group of Seven industrialized countries and the expanded Group of Twenty, which includes major emerging powers like China, India, Brazil, Turkey and others. It is also a rejection of te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ghana International Airlines
Ghana International Airlines (GIA) was the national airline of the Republic of Ghana between 2005 and 2010. The airline suspended operations on 13 May 2010. GIA operated scheduled and charter passenger and cargo services. Its main base was Kotoka International Airport, Accra. History The airline was set up in 2004 as a partnership between the government of Ghana and a group of private international investors. A team of executives led by Ralph Atkin, founder of SkyWest Airlines in the United States, was installed, which also included Brian Presbury, the former CEO of Kenya Airways. Ghana International Airlines commenced operations on 29 October 2005 with daily flights between Accra and London Gatwick Airport using a Boeing 757 wet leased from Ryan International Airlines. The airline commenced seasonal service to OR Tambo International Airport in Johannesburg, South Africa, in 2006. Flights to Düsseldorf, Germany, began in 2008. It is owned by the Ghanaian government (70%) an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teletext Character Set
This article covers technical details of the character encoding system defined by ETS 300 706, a standard for World System Teletext, and used for the Viewdata and Teletext variants of Videotex in Europe. Character sets The following tables show various Teletext character sets. Each character is shown with a potential Unicode equivalent if available. Space and control characters are represented by the abbreviations for their names. Control characters Control characters are used to set foreground and background color, character height, current default character set, and other attributes. In formats where compatibility with ECMA-48's C0 control codes such as and is not required, these control codes are sometimes mapped transparently to the Unicode C0 control code range (U+0000 through U+001F). Amongst C1 control code sets, the Videotex character set#C1 control codes, ITU T.101 C1 control codes for "Serial" Data Syntax 2, are mostly a transposition of the Teletext spacing cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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