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Luminosity (other)
Luminosity is the total amount of energy radiated by an object per unit time. Luminosity may also refer to: *Luminosity (scattering theory), the number of particles per unit area per unit time times the opacity of the target * Luminosity (yacht), an 107.6 meter hybrid yacht * Luminosity — Ignite the Night!, a former Cedar Point amusement park show that was shown from 2012 to 2017. *Luminosity function (astronomy), a function of the number of stars or galaxies per luminosity interval *Luminosity Gaming, an e-sports team Other uses *Luminance a measure of light, spectrally weighted per the Luminous efficiency function. *Luminous efficiency function, in colorimetry, the curve which defines the visual sensitivity of the human eye to light of different wavelengths. In the early 20th century this was briefly referred to as the luminosity function but that use was depreciated to avoid confusion with the term as used in astronomy. *Luminous flux Games *Luma (video) a gamma encoded s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity
Luminosity is an absolute measure of radiated electromagnetic power (light), the radiant power emitted by a light-emitting object over time. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical object. In SI units, luminosity is measured in joules per second, or watts. In astronomy, values for luminosity are often given in the terms of the luminosity of the Sun, ''L''⊙. Luminosity can also be given in terms of the astronomical magnitude system: the absolute bolometric magnitude (''M''bol) of an object is a logarithmic measure of its total energy emission rate, while absolute magnitude is a logarithmic measure of the luminosity within some specific wavelength range or filter band. In contrast, the term ''brightness'' in astronomy is generally used to refer to an object's apparent brightness: that is, how bright an object appears to an observer. Apparent brightness depends on both the lumin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity (scattering Theory)
In scattering theory and accelerator physics, luminosity (''L'') is the ratio of the number of events detected (''dN'') in a certain period of time (''dt'') to the cross-section (''σ''): : L = \frac\frac. It has the dimensions of events per time per area, and is usually expressed in the cgs units of cm−2· s−1 or the non-SI units of b−1·s−1. In practice, ''L'' is dependent on the particle beam parameters, such as beam width and particle flow rate, as well as the target properties, such as target size and density. A related quantity is integrated luminosity (''L''int), which is the integral of the luminosity with respect to time: : L_\mathrm = \int L \ dt. The luminosity and integrated luminosity are useful values to characterize the performance of a particle accelerator. In particular, all collider experiments aim to maximize their integrated luminosities, as the higher the integrated luminosity, the more data is available to analyze. Examples of collider lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity (yacht)
''Luminosity'' is one of the largest yachts in the world, with a length of . The interior of the yacht was designed by Zaniz Jakubowski. ''Luminosity'' is one of the first yachts to feature a hybrid propulsion system, considered a more environmentally friendly than traditional diesel-powered boats. The yacht was built by Benetti in Livorno Livorno () is a port city on the Ligurian Sea on the western coast of Tuscany, Italy. It is the capital of the Province of Livorno, having a population of 158,493 residents in December 2017. It is traditionally known in English as Leghorn (pronou ..., Italy. References {{reflist Motor yachts 2020 ships ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity — Ignite The Night!
Luminosity is an absolute measure of radiated electromagnetic power (light), the radiant power emitted by a light-emitting object over time. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical object. In SI units, luminosity is measured in joules per second, or watts. In astronomy, values for luminosity are often given in the terms of the luminosity of the Sun, ''L''⊙. Luminosity can also be given in terms of the astronomical magnitude system: the absolute bolometric magnitude (''M''bol) of an object is a logarithmic measure of its total energy emission rate, while absolute magnitude is a logarithmic measure of the luminosity within some specific wavelength range or filter band. In contrast, the term ''brightness'' in astronomy is generally used to refer to an object's apparent brightness: that is, how bright an object appears to an observer. Apparent brightness depends on both the luminos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity Function (astronomy)
In astronomy, a luminosity function gives the number of stars or galaxies per luminosity interval. Luminosity functions are used to study the properties of large groups or classes of objects, such as the stars in clusters or the galaxies in the Local Group. Note that the term "function" is slightly misleading, and the luminosity function might better be described as a luminosity ''distribution''. Given a luminosity as input, the luminosity function essentially returns the abundance of objects with that luminosity (specifically, number density per luminosity interval). Main sequence luminosity function The main sequence luminosity function maps the distribution of main sequence stars according to their luminosity. It is used to compare star formation and death rates rates, and evolutionary models, with observations. Main sequence luminosity functions vary depending on their host galaxy and on selection criteria for the stars, for example in the Solar neighbourhood or the Small M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity Gaming
Luminosity Gaming is a professional esports organization based in North America. It has teams competing in '' Call of Duty, Overwatch, Tom Clancy's Rainbow Six: Siege'', '' Super Smash Bros.'', ''Fortnite,'' ''Apex Legends and Rocket League''. The team was founded in Canada by Steve "Buyaka" Maida in 2015, and is based in Toronto, Ontario. Current divisions ''Apex Legends '' ''Fortnite '' ''Valorant'' ''Super Smash Bros. '' In October 8th, 2016, Luminosity Gaming signed their first Super Smash Bros. for 3DS and Wii U representative being the Japanese Mewtwo player Abadango. Shortly after, they signed their first Super Smash Bros. Melee player being European Fox main Ice. Both players left shortly before the start of 2018 ending their Smash Division. This was until Melee player Ginger was signed in February of 2021. In October 9th, 2022, they announced Maister as their first Super Smash Bros. Ultimate player. Former divisions ''Counter-Strike: Glo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle. Brightness is the term for the ''subjective'' impression of the ''objective'' luminance measurement standard (see for the importance of this contrast). The SI unit for luminance is candela per square metre (cd/m2). A non-SI term for the same unit is the nit. The unit in the Centimetre–gram–second system of units (CGS) (which predated the SI system) is the stilb, which is equal to one candela per square centimetre or 10 kcd/m2. Description Luminance is often used to characterize emission or reflection from flat, diffuse surfaces. Luminance levels indicate how much luminous power could be detected by the human eye looking at a particular surface from a particular angle of view. Luminance is thus an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminous Efficiency Function
A luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light. It is based on subjective judgements of which of a pair of different-colored lights is brighter, to describe relative sensitivity to light of different wavelengths. It is not an absolute reference to any particular individual, but is a standard observer representation of visual sensitivity of theoretical human eye. It is valuable as a baseline for experimental purposes, and in colorimetry. Different luminous efficiency functions apply under different lighting conditions, varying from photopic in brightly lit conditions through mesopic to scotopic under low lighting conditions. When not specified, ''the luminous efficiency function'' generally refers to the photopic luminous efficiency function. The CIE photopic luminous efficiency function or is a standard function established by the Commission Internationale de l'Éclairage (CIE) and may b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminous Flux
In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light), in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light. Units The SI unit of luminous flux is the lumen (lm). One lumen is defined as the luminous flux of light produced by a light source that emits one candela of luminous intensity over a solid angle of one steradian. 1\ \text = 1\ \text \times 1\ \text In other systems of units, luminous flux may have units of power. Weighting The luminous flux accounts for the sensitivity of the eye by weighting the power at each wavelength with the luminosity function, which represents the eye's response to different wavelengths. The luminous flux is a weighted sum of the power at all wavelengths in the visible band. Light outside the vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luma (video)
In video, luma represents the brightness in an image (the "black-and-white" or achromatic portion of the image). Luma is typically paired with chrominance. Luma represents the achromatic image, while the chroma components represent the color information. Converting R′G′B′ sources (such as the output of a three-CCD camera) into luma and chroma allows for chroma subsampling: because human vision has finer spatial sensitivity to luminance ("black and white") differences than chromatic differences, video systems can store and transmit chromatic information at lower resolution, optimizing perceived detail at a particular bandwidth. Luma versus relative luminance Luma is the weighted sum of gamma-compressed R′G′B′ components of a color video—the ''prime symbols'' ′ denote gamma compression. The word was proposed to prevent confusion between luma as implemented in video engineering and relative luminance as used in color science (i.e. as defined by CIE). Relative lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumosity
Lumosity is an online program consisting of games claiming to improve memory, attention, flexibility, speed of processing, and problem solving. History Lumos Labs was founded in 2005 by Kunal Sarkar, Michael Scanlon, and David Drescher. Lumosity.com launched in 2007 and, as of January 2015, has 70 million members. Financials The company raised $400,000 in capital from angel investors in 2007, a Series A of $3 million from Harrison Metal Capital, FirstMark Capital and Norwest Venture Partners in 2008, a Series C of $32.5 million led by Menlo Ventures, and a Series D of $31.5 million led by Discovery Communications with participation from existing investors. Effectiveness and legal history On January 5, 2016, Lumos Labs agreed to a $50 million settlement (reduced to $2 million subject to financial verification) to the Federal Trade Commission over claims of false advertising for their product. The Commission found that Lumosity's marketing "preyed on consumers' fears about age- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumino City
''Lumino City'' is a puzzle adventure video game developed and published by State of Play Games. The game was released for OS X and Windows in December 2014, for iOS in October 2015., and Android for 12 April 2017. It is a sequel to ''Lume''. Gameplay ''Lumino City'' is a puzzle adventure video game. Development and release ''Lumino City'' was developed by State of Play Games. It is a sequel to ''Lume''. ''Lumino City'' was released OS X and Windows on 3 December 2014, for iOS on 29 October 2015. and for Android on 12 April 2017 but the Android version was published by Noodlecake Studios Reception At the 2015 Independent Games Festival, ''Lumino City'' was nominated for the "Excellence in Visual Art". At the 2015 British Academy Games Awards, ''Lumino City'' won the "Artistic Achievement" category, and was also nominated in the categories "British Game" and "Game Innovation". The game received a nomination in the "Most Innovative" category at the 2016 Games for Change ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
