Refimprove date February 2008 Context date October 2009 In physics, endcorrection is the anomal difference between the frequency of a tuning fork and the corresponding sound wave s inside of a tube. It is caused because generally there is air space between the fork and the pipe end, causing the air column to vibrate a short distance beyond the edge of the tube. A theoretical basis for computation of the endcorrection is the radiation acoustic impedance of a circular piston . This impedance represents the ratio of Sound pressure acoustic pressure at the piston, divided by the Volumetric flow rate flow rate induced by it. The Airspeed air speed is typically assumed to be uniform across the tube end. This is a good approximation, but not exactly true in reality, since air viscosity reduces the flow rate in the boundary layer very close to the tube surface. Thus, air column inside the tube is loaded by the external fluid due to Acoustic radiation pressure sound energy radiation . This requires an additional length to be added to the regular length for calculating the Acoustic resonance Resonance of a tube of air natural frequency of the pipe system . Sources http www.fonema.se mouthcorr mouthcorr.htm Mouth Correction . Category Fluid dynamics phys stub th Endcorrection ... more details
Wiktionary Correction may refer to An euphemism for punishment Correction newspaper , the posting of a notice of a mistake in a past issue of a newspaper Correction stock market , in financial markets, a short term price decline Correction novel Correction novel , a 1975 novel by Thomas Bernhard See also Intitle Correction Corrections disambiguation Corrector , a political administrative office in classical Antiquity and some religions disambiguation fr Correction it Correzione pt Corretor desambigua o ... more details
Unreferenced date December 2009 Image Filmintypewriter.jpg thumb A sheet of correction paper in a typewriter. Correction paper , or correction film , its plastic based equivalent, is a tab of plastic with one side coated paper coated with white correction material. It is used to correct typing error s made when using a typewriter . When inserted between the paper and the typebar , and the ribbon select switched to stencil , i.e. inking turned off, the impression of the typebar presses the shape of the character into the film, which prints the white correction material onto the paper, hiding the erroneous Glyph character and preparing the document for the correct character. See also Correction fluid Correction tape DEFAULTSORT Correction Paper Category Correction instruments Category Stationery Category Typewriters Category Paper ... more details
reflist refimprove date February 2008 File Correction tape dispenser.png thumb Correction tape dispenser Correction tape is an alternative to correction fluid used to correct mistakes during typing, or, in some forms, handwriting. One side of the tape, which is placed against the error, is coated in a white, opaque masking material. Pressure applied to the other side of the tape transfers this material to the paper. History Empty section date January 2011 Types of correction tape It is sold as short pieces of tape, or as long rolls to be used in typewriter s, which apply sudden pressure when a key is struck, and can therefore apply the masking material in exactly the same shape and position as the erroneous character. Some versions of correction tape are sold in separate dispensers that are used to roll the tape onto paper directly, sometimes known as a correction mouse. The IBM Selectric typewriter also offered a correction tape that was actually a lift off tape for use with its carbon film typewriter ribbons . As it is solid, correction tape is not subject to misuse as an inhalant , unlike most correction fluids. See also Correction paper Correction fluid Liquid Paper External links commonscat Correction tape DEFAULTSORT Correction Tape Category Correction instruments Category Stationery Category Typing Category Typewriters tool stub nl Blancoroller zh yue zh ... more details
one source date September 2011 The Correction Stakes is an United States American Thoroughbred horse race run annually near the end of January at Aqueduct Racetrack in Ozone Park, Queens , New York . A Graded stakes race non graded stakes race for Filly fillies and Mare mares age three and older, it is raced on dirt over a distance of six furlong s. It currently offers a purse of 100,000. Inaugurated in 1940 at Jamaica Race Course , following that track s closure the race was moved to its current location at Aqueduct Racetrack. The race was named in honor of Correction, a filly owned by John Albert Morris John Morris and his son, Alfred Hennen Morris Alfred and trained by National Museum of Racing and Hall of Fame U. S. Racing Hall of Fame inductee, R. Wyndham Walden Wyndham Walden . ref http www.nyra.com aqueduct Stakes Correction.shtml Correction Stakes history at the NYRA ref In 1952, the race was open to fillies and mares and in 1954 it was run in two divisions. References reflist Horseracing race stub Category Ungraded stakes races in the United States Category Sprint category horse races for fillies and mares Category Horse races in New York Category Aqueduct Racetrack Category Recurring events established in 1940 ... more details
project ad infinitum , and ultimately corrects it to its extreme self correction suicide . Correction ... of suicide, ending with the sentence, The end is no process. Clearing, and the narrator s own ... in Correction are as comical and sometimes as absurd as those of the above two Modernism modernists ... M. Baskin Boston Review , 2001 http quarterlyconversation.com thomas bernhard correction Reconsidering Thomas Bernhard s Correction , by David Sepanik The Quarterly Conversation , 2005 http books.google.com ... reading correction.html Bob Corbett s Comments on Correction 2001 External links http www.haus wittgenstein.at ... more details
In statistics , Bessel s correction , named after Friedrich Bessel , is the use of n 1 instead ... an unbiased estimator of the population variance. The cost of this correction is that the unbiased ... 0 19 954145 4 entry for Variance data ref the factor n n 1 is itself called Bessel s correction . A subtle point is that, while the sample variance using Bessel s correction is an unbiased ... standard deviation, though there are correction factors for particular distributions ... s correction intuitively as the Degrees of freedom statistics degrees of freedom in the errors ... 5 7.2 end align math But our estimate of the population average is the sample average, 2052, not ... 2052 2 2050 2052 2 2051 2052 2 right & frac 16 5 3.2 end align math This is a substantially smaller ... terms, we are seeking the sum of squared distances from the population mean, but end up calculating ... smallmatrix text Deviation from text the population text mean end smallmatrix , 2 & , overbrace , underbrace 2053 2052 begin smallmatrix text Deviation from text the sample mean end smallmatrix , text ... 2 2053 2052 2052 2050 text This is 2ab. overbrace 2052 2050 2 text This is b 2. end align math Now ... smallmatrix text The sum of the entries in this text middle column must be 0. end smallmatrix 2052 2050 2 end align math The sum of the entries in the middle column must be zero because the sum of the deviations ... squares is found. Terminology This correction is so common that the term sample standard deviation ... is the biased sample variance i.e. without Bessel s correction s sup 2 sup is the unbiased sample variance i.e. with Bessel s correction The standard deviations will then be the square roots of the respective ... s correction yields an unbiased estimator of the population variance By definition, math begin ... sum i 1 n operatorname E x i mu 2 n operatorname E overline x mu 2 right end align math Note that, since ... urlname BesselsCorrection title Bessel s Correction DEFAULTSORT Bessel s Correction Category Statistical ... more details
Perspective correction may refer to Perspective control procedure for editing photographs A way of performing texture mapping Perspective correctness texture mapping during 3D rendering disambig ... more details
File GammaFunctionGraph.svg thumb Example of Cathode ray tube CRT gamma correction Image GammaCorrection demo.jpg thumb The effect of gamma correction on an image The original image was taken to varying ... make dark regions lighter. Gamma correction , gamma nonlinearity , gamma encoding , or often simply ... encoding ref Gamma correction is, in the simplest cases, defined by the following Power law power ... be presented. The gamma correction, or contrast selection, is part of the photographic repertoire ... does not usually require further gamma correction, since the standard video signals that are transmitted ... between the intensity values 0.0 and 0.1, while the steps at the higher end of the scale are hardly ..., the inverse transfer function gamma correction is sometimes applied to the video signal so that the end to end response is linear. In other words, the transmitted signal is deliberately distorted ... a correction onto the signal voltage in order to approximately get a standard nowrap 1 2.5 behavior ... function with an exponent of 2.2, without a linear portion. Methods to perform display gamma correction ... correction may be done, either on display or to create a modified image file with a different ... gamma correction look up table in order to modify the encoded signals digitally before the DACs ... will do gamma decoding or correction as needed, to get to a linear intensity domain. All the encoding and correction methods can be arbitrarily superimposed, without mutual knowledge of this fact among ... correction will involve several cooperating parts. The camera encodes its rendered image into the JPEG ... may do its own gamma correction to match the CRT gamma to that used by the video system. Coordinating ... correction settings, by issuing the command code xgamma gamma 2.1 code for setting gamma value to 2.1 ... applies to a subjective visual attribute. Gamma correction is a type of power law function whose exponent ... used for the latter as in x . To use the word function in conjunction with gamma correction ... more details
unreferenced date April 2010 Eye care professionals use prism correction as a component of some eyeglass prescription s. A corrective lens lens with prism correction displaces the image, which is used to treat muscular imbalance or other conditions see Vergence Vergence dysfunction vergence dysfunction that cause errors in eye orientation. Prism correction is measured in prism dioptres . A prescription that specifies prism correction will also specify the base , which is the direction of displacement. Prism dioptres Prism correction is commonly specified in prism dioptres , a unit of angular measurement that is loosely related to the dioptre . The prism dioptre of a lens is equal to one hundred times the Trigonometric functions tangent tangent of the angle by which it displaces an image seen through the lens. Prism dioptre is represented by the Greek symbol delta . A prism of power 1 would produce 1 unit of displacement for an object held 100 units from the prism. Thus a prism of 1 would produce 1 cm visible displacement at 100 cm, 2 would produce 2 cm displacement at 100 cm, and so on. math P 100 tan d math where math P math is the amount of prism correction in prism dioptres, and math d math is the angle of deviation of the light. For a prism optics prism with apex angle math a math and refractive index math n math , math d n 1 a math . Prentice s rule Prentice s rule is a formula used when prescribing prism correction math P cf math where P is the amount of prism correction in prism dioptres c is decentration in centimetres f is lens power in dioptre s The practical use of Prentice s rule is that under certain circumstances, the prescribed prism can be obtained without grinding prism into the lenses, by decentering the lenses as worn by the patient. Category Ophthalmology Category Corrective lenses Category Optometry med stub optics stub fr Dioptrie prismatique ... more details
The house of correction was a type of establishment built after the passing of the Elizabethan Poor Law 1601 , places where those who were unwilling to work , including vagrants and beggars, were set to work. The building of houses of correction came after the passing of an amendment to the Elizabethan Poor Law . ref http www.victorianweb.org history poorlaw elizpl.html The 1601 Elizabethan Poor Law Bot generated title ref However the houses of correction were not considered a part of the Elizabethan Poor Law system because the Act distinguished between settled poor and wandering poor. Notorious magistrate Allan Laing sent three youths to the house of correction for singing in the streets. In the Commonwealth of Massachusetts , the term remains synonymous with state jail s. http www.middlesexsheriff.org about newbhoc.htm The same is true for the State of Maryland. http www.dpscs.state.md.us locations prisons.shtml References reflist Poor Law UK hist stub Category Poor Law Category Poverty no Spinnehus fi Kehruuhuone sv Spinnhus ... more details
refimprove date August 2008 orphan date August 2008 Atmospheric correction is the process of removing the effects of the atmosphere on the reflectance values of images taken by satellite or airborne sensors. ref cite web url http www.umiacs.umd.edu research GC atmo index.html title Atmospheric Correction accessdate 2008 08 18 publisher University of Maryland Institute for Advanced Computer Studies ref There are bidirectional and empirical models for doing atmospheric correction on an image. See also colbegin 3 Adaptive optics colend References reflist External links http books.google.ca books?id u17Zv45DENoC&pg PA157&lpg PA157&dq Atmospheric Corrections&source web&ots ABVKHMTh f&sig f gR5KqcbXqCeK0PXk6dY5UuC9s&hl en&sa X&oi book result&resnum 2&ct result Google books result http books.google.ca books?id KQXNaDH0X IC&pg PA343&lpg PA343&dq Atmospheric Corrections&source web&ots skh0EQFcMH&sig sRzu7plKBpDjDrLkrDHTuGXdkcc&hl en&sa X&oi book result&resnum 5&ct result Google books result DEFAULTSORT Atmospheric Correction Category Photographic techniques science stub ... more details
Orphan date November 2009 Unreferenced date November 2009 Infinity Correction is a technique in microscopy whereby the light coming out of the objective lens is Focus optics focus ed at infinity . Category Microscopy optics stub ... more details
A market correction is a rapid change in the nominal price of a commodity , after a Barriers to trade barrier to free trade has been removed and the free market establishes a new equilibrium price . It may also refer to several of these single commodity corrections en masse , as a collective effect over several markets concurrently. See also Market trend Market Trend Panic of 1796 1797 Real Estate Bubble of 1796 1797 Panic of 1837 Financial Bubble of 1837 United States housing market correction U.S. Housing Market Correction United States housing bubble United States Housing Bubble Category Market trends Category Financial markets Category Financial economics Category Investment Category Behavioral finance Category Capitalism Category Systemic Risk Behavioral & Social Facets ... more details
from the end of a small diameter tube that is sealed against the core surface. The pressure in the probe ... Inst., pp. 200 213. Reflist External links DEFAULTSORT Klinkenberg Correction Category Petroleum ... more details
Image Spelling Correction Example.jpg thumb right 275px Correction fluid can be written on after it has dried. A correction fluid is an opaque, white fluid applied to paper to mask errors in text. Once dried, it can be written over. It is typically packaged in small bottles, and the lid has an attached brush or a triangular piece of foam which dips into the bottle. The brush is used to apply the fluid onto the paper. Before the invention of word processor s, correction fluid greatly facilitated the production of typewritten documents. One of the first forms of correction fluid was invented in 1951 by the secretary Bette Nesmith Graham , founder of Liquid Paper , and mother of Mike Nesmith of The Monkees . Thinner Because it contains organic solvent s volatile organic compounds , unused correction fluid thickens over time as volatile solvents escape into the air. It can become too thick to use, and sometimes completely solidifies. Therefore, some manufacturers sell also bottles of solvent as thinner , a few drops of which will return the correction fluid to its original liquid state. Thinner ... the Ozone Layer , and then the slightly safer trichloroethylene . Thinners currently used with correction ... http profiles.nlm.nih.gov VC B B D J Sniffing Correction Fluid Can Stop Your Heart 1991 ref due ... drugs . Use of correction fluid as an inhalant can cause the heart to beat rapidly and irregularly ... or drinking the fluid. Correction pens More recently, correction fluid has become available in pen ... a tiny surface is exposed during application or clogging. Notable brands Correction fluid is commonly ... Out Tipp Ex Twink correction fluid Twink Pentel correction pen. Edigs Generally, Liquid Paper and Wite ... . Twink is the leading brand, and colloquial term, for correction fluid in New Zealand . In the English ... 2008 . See also Correction paper Correction tape Liquid Paper References Notes reflist spacing Refimprove ... blliquid paper.htm DEFAULTSORT Correction Fluid Category Correction instruments Category Stationery ... more details
Unreferenced date December 2009 Orphan date December 2009 The Langer correction is a correction when WKB approximation method is applied to three dimensional problems with spherical symmetry. When applying WKB approximation method to the radial Schr dinger equation math frac hbar 2 2 m frac d 2 R r dr 2 E V eff r R r 0 math where the effective potential is given by math V textrm eff r V r frac l l 1 hbar 2 2mr 2 math the eigenenergies and the wave function behaviour obtained are different from real solution. In 1937, Rudolph E. Langer suggested a correction math l l 1 rightarrow left l frac 1 2 right 2 math which is known as Langer correction. This is equivalent to inserting a 1 4 constant factor whenever l l 1 appears. Heuristically, it is said that this factor arises because the range of the radial Schr dinger equation is restricted from 0 to infinity, as opposed to the entire real line. By such a changing of constant term in the effective potential, the results obtained by WKB approximation reproduces the exact spectrum for many potentials. References http prola.aps.org abstract PR v51 i8 p669 1 The original publication. DEFAULTSORT Langer Correction Category Theoretical physics ... more details
In statistics , the Bonferroni correction is a method used to counteract the problem of multiple comparisons ... . The correction is based on the idea that if an experimenter is testing n dependent or independent ... level for the whole family of tests should be at most , then the Bonferroni correction would be to test ... . The Bonferroni correction is derived by observing Boole s inequality . If n tests are performed ... of Bonferroni correction see, e.g., Perneger, 1998 . First, Bonferroni correction controls the probability of Type I and type II errors Type I error false positives only. The correction ... to retain, not reject, the null hypothesis, then Bonferroni correction is non conservative. Alternatives to Bonferroni correction Holm Bonferroni method A uniformly more statistical power powerful test ... correction. A less restrictive criterion that does not control the familywise error rate is the False ... the p values, then using different criteria for each test. id k correction A related correction, called the id k correction or Dunn id k correction that is often used is math 1 1 alpha 1 n math This correction is often confused with the Bonferroni correction. The id k correction is derived ... can derive valid confidence intervals matching the test decision using the id k correction by using 100 1 sup 1 n sup confidence intervals. The Bonferroni correction is a safeguard against ... result with n tests . The id k correction gives a stronger bound than the Bonferroni correction, because, for math n ge 1 math , math alpha n le 1 1 alpha 1 n math . But the id k correction requires the additional condition of independence. Previously, because the id k correction requires fractional powers i.e. roots , the computationally simpler Bonferroni correction was often preferred ... s correction Dunnett 1955, 1966 not to be confused with Dunn described an alternative alpha error ... mtc.pdf Explanation of p value correction methods under the context of differential gene expression ... more details
K correction is a correction to an Astronomy astronomical object s Magnitude astronomy magnitude or equivalently, its flux that allows a measurement of a quantity of light from an object at a redshift z to be converted to an equivalent measurement in the rest frame of the object. If one could measure all the light from an object at all wavelength s a bolometric flux , a K correction would not be required. If one measures the light emitted in an emission line , a K correction is not required. The need for a K correction arises because an astronomical measurement through a single filter optics filter or a single bandpass only sees a fraction of the total spectrum , redshifted into the frame of the observer. So if the observer wants to compare the measurements through a red filter of objects at different redshifts, the observer will have to apply estimates of the K corrections to these measurements to make a comparison. One claim for the origin of the term K correction is Edwin Hubble , who supposedly arbitrarily chose math K math to represent the reduction factor in magnitude due to this effect. ref cite journal title Effects of Red Shifts on the Distribution of Nebulae authorlink Edwin Hubble first Edwin last Hubble year 1936 journal Astrophysical Journal volume 84 pages 517 554 doi 10.1086 143782 bibcode 1936ApJ....84..517H ref Yet Kinney et al., in footnote 7 on page 48 of their article, ref cite journal title Template ultraviolet spectra to near infrared spectra of star forming galaxies and their application to K corrections first A.C. last Kinney et al. year 1996 journal ... to the correction as a Konstante German for constant , hence K correction. The exact nature of the calculation that needs to be applied in order to perform a K correction depends upon the type ... ref References references External links http www.ucolick.org cnaw kcorr kplot.html K Correction plots http xxx.lanl.gov abs astro ph 0210394 The K correction DEFAULTSORT K Correction Category ... more details
Infobox Album See Wikipedia WikiProject Albums Name Position Correction Type Album Artist TZU Cover Positioncorrection.jpg Released 2004 Recorded Genre Australian hip hop Length 51 15 Label Liberation Music P & C Liberation Music Producer TZU Last album This album Position Correction br 2004 Next album Smiling at Strangers br 2005 Position Correction is the debut album by Australian Hip Hop band TZU , released in 2004. The album was released under the Liberation Music P & C Liberation Music record label. Track listing Who? 3 56 Summer Days 3 53 Position Correction 3 57 Good Dog 4 23 Dam Busters 2 32 Wild Stylee feat. Mark Pearl 4 15 Curse of the Word 4 21 The Horse You Rode In On 3 35 Back Up 3 57 Bold Digger 5 55 The Travel Song 10 32 Singles Dam Busters Category TZU albums Category 2004 debut albums 2000s hiphop album stub Australia stub ... more details
In particle physics , a nonoblique correction , also called a direct correction , refers to a particular type of Renormalization radiative correction to the electroweak sector of the Standard Model. Nonoblique corrections are defined in four fermion scattering processes Subatomic particle Antielectron Subatomic particle Electron Subatomic particle quark Subatomic particle Antiquark at the CERN LEP collider. There are three classes of radiative corrections to these processes vacuum polarization corrections, vertex function vertex corrections , and box corrections. The vertex and box corrections, which depend on the identity of the initial and final state fermions, are referred to as the non oblique corrections. The vacuum polarization corrections are referred to as oblique correction s, since they only affect the mixing and propagation of the gauge bosons and they do not depend on which type of fermions appear in the initial or final states. An example of a vertex correction is the nonuniversality flavor dependence of the couplings of the quarks and leptons to the charged and neutral weak currents. Another example is the anomalous magnetic dipole moment . In order to affect the nonoblique corrections, new particles must couple directly to the external fermions. Such couplings are expected to be suppressed in most cases, with one exception being the math Z b bar b math vertex. Together with the oblique corrections, nonoblique corrections can be used to constrain models of new physics beyond the Standard Model . References J.L. Hewett, The Standard Model and Why We Believe It , http arxiv.org abs hep ph 9810316 arXiv hep ph 9810316 , lectures given at Theoretical Advanced Study Institute TASI 97 . Category Particle physics particle stub ... more details
In astronomy , a bolometric correction is a correction that must be made to the absolute Magnitude astronomy magnitude of an object in order to convert an object s visible magnitude to its Bolometric magnitude Bolometric magnitude bolometric magnitude . Mathematically, such a calculation can be expressed math BC M b M v , math The following is subset of a table from Kaler ref name kalerpaper p. 263 listing the bolometric correction for a range of stars. For the full table, see the referenced work. class wikitable border 1 Class Main Sequence Giants Supergiants O3 4.3 4.2 4.0 G0 0.10 0.13 0.1 G5 0.14 0.34 0.20 K0 0.24 0.42 0.38 K5 0.66 1.19 1.00 M0 1.21 1.28 1.3 The bolometric correction is large both for early type hot stars and for late type cool stars. The former because a substantial part of the produced radiation is in the ultraviolet, the latter because a large part is in the infrared. For a star like our Sun, the correction is only marginal because the Sun radiates most of its energy in the visual wavelength range. See also absolute magnitude External links http www.peripatus.gen.nz Astronomy SteMag.html contains table of bolometric corrections http articles.adsabs.harvard.edu full 1996ApJ...469..355F 0000360.000.html contains detailed tables of bolometric corrections note that these second set of tables are consistent with a bolometric magnitude of 4.73 ref name tableprovisoBC for the Sun and also be aware that there are misprint ref name tableprovisoBC errors for a few of the figures in the tables References reflist 30em refs ref name kalerpaper cite journal title Stars and their spectra An Introduction to the Spectral Sequence author Kaler, James B. year 1989 pages 300 ref ref name tableprovisoBC cite journal author Torres, Guillermo. title On the Use of Empirical Bolometric Corrections for Stars journal The Astronomical Journal year 2010 volume 140 issue 5 pages 1158 1162 doi 10.1088 0004 6256 140 5 1158 bibcode 2010AJ....140.1158T ref Category Observational ... more details
About color correction using lighting and camera filters video color correction in post production Color grading color correction of still images in post production Color balance mutual color correction of digital images Color mapping Color correction by using color gel s, or filters, is a process used in stage lighting , photography , television , cinematography and other disciplines, the intention of which is to alter the overall color of the light typically the light color is measured on a scale known as color temperature , as well as along a green magenta axis orthogonal to the color temperature axis. Without color correction gels, a scene may have a mix of various colors. Applying color correction gels in front of light sources can alter the color of the various light sources to match. Mixed lighting can produce an undesirable aesthetic when displayed on a television or in a theatre. Conversely, gels may also be used to make a scene appear more natural by simulating the mix of color temperatures that occur naturally. This application is useful especially where motivated lighting lending the impression that it is diegetic is the goal. Color gels may also be used to tint lights for artistic effect. Correlated color temperature image PlanckianLocus.png thumb Chromaticity diagram, Planckian locus, and lines of constant CCT. The particular color of a white light source can be simplified ... The main color correction gels are CTB color temperature blue and CTO color temperature orange . A CTB ...&pg PA67&dq 22color conversion and correction gels 22 intitle lighting inauthor jackman temperatures&lr ... and hence color correction filters are not entirely necessary. However, some digital cinema cameras can record an image without any digital filtering applied. Using physical color correction ... cameras designed for Electronic news gathering ENG use filter wheels containing color correction .... Color correction filters are an effective method of adjusting white balance. Without filtering ... more details
The Davidson correction is a simple correction that is often applied in calculations using the method of configuration interaction , which is one of several post Hartree&ndash Fock ab initio quantum chemistry methods in the field of computational chemistry . It was introduced by Ernest R. Davidson . It allows one to estimate the value of the full configuration interaction energy from a limited configuration interaction expansion result, although more precisely it estimates the energy of configuration interaction up to quadruple excitations CISDTQ from the energy of configuration interaction up to double excitations CISD . It uses the formula math Delta E Q 1 a 0 2 E rm CISD E rm HF , math math E rm CISDTQ approx E rm CISD Delta E Q, math where a sub 0 sub is the coefficient of the Hartree&ndash Fock wavefunction in the CISD expansion, E sub CISD sub and E sub HF sub are the energies of the CISD and Hartree&ndash Fock wavefunctions respectively, and E sub Q sub is the correction to estimate E sub CISDTQ sub , the energy of the CISDTQ wavefunction. References Langhoff, S. R. and Davidson, E. R., International Journal of Quantum Chemistry , 8 , 61, 1974 Category Computational chemistry chem stub quantum stub ... more details
In particle physics , an oblique correction refers to a particular type of Renormalization radiative correction to the electroweak sector of the Standard Model. Oblique corrections are defined in four fermion scattering processes, Subatomic particle Antielectron Subatomic particle Electron Subatomic particle quark Subatomic particle Antiquark at the CERN LEP collider. There are three classes of radiative corrections to these processes vacuum polarization corrections, vertex function vertex corrections , and box corrections. The vacuum polarization corrections are referred to as oblique corrections, since they only affect the mixing and propagation of the gauge bosons and they do not depend on which type of fermions appear in the initial or final states. The vertex and box corrections, which depend on the identity of the initial and final state fermions, are called nonoblique correction s. Any new particles charged under the electroweak gauge group s can contribute to oblique corrections. Therefore, the oblique corrections can be used to constrain possible new physics beyond the Standard Model . To affect the nonoblique corrections, on the other hand, the new particles must couple directly to the external fermions. The oblique corrections are usually parameterized in terms of the Peskin Takeuchi parameter s S, T, and U. References J.L. Hewett, The Standard Model and Why We Believe It , http arxiv.org abs hep ph 9810316 arXiv hep ph 9810316 , lectures given at Theoretical Advanced Study Institute TASI 97 . Category Particle physics particle stub ... more details
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