Unreferenced date July 2009 In digital signal processing , a quadraturemirrorfilter is a filter most commonly used to implement a filter bank that splits an input signal processing signal into two bands. The resulting high pass and low pass signals are often reduced by a factor of 2, giving a critically sampled two channel representation of the original signal. The analysis filters are related by the following formulae math H 0 e j Omega 2 H 1 e j Omega 2 1 math where math Omega math is the frequency , and the sampling rate is normalized to math 2 pi math . In other words, the power sum of the high pass and low pass filters is equal to 1. The filter responses are symmetric about math Omega pi 2 math math H 1 e j Omega H 0 e j pi Omega math Orthogonal wavelet s the Haar wavelets and related Daubechies wavelets, Coiflets, and some developed by Mallat, are generated by scaling functions which, with the wavelet, satisfy a quadraturemirrorfilter relationship. Perfect reconstruction Even if the two resulting bands have been subsampled by a factor of 2, the relationship between the filters means that approximately perfect reconstruction is possible. That is, the two bands can then be upsampled, filtered again with the same filters and added together, to reproduce the original signal exactly but with a small delay . In practical implementations, numeric precision issues in floating point arithmetic may affect the perfection of the reconstruction. Category Digital signal processing Category Filter theory cs Kvadraturn zrcadlov filtr es Filtro espejo en cuadratura ja simple Quadraturemirrorfilter ... more details
Unreferenced date December 2009 In signal processing , a quadraturefilter math q t math is the analytic signal analytic representation of the impulse response math f t math of a real valued filter math q t f a t left delta t i over pi t right f t math If the quadraturefilter math q t math is applied to a signal math s t math , the result is math h t q s t left delta t i over pi t right f t s t math which implies that math h t math is the analytic representation of math f s t math . Since math q math is an analytic signal, it is either zero or complex valued. In practice, therefore, math q math is often implemented as two real valued filters, which correspond to the real and imaginary parts of the filter, respectively. An ideal quadraturefilter cannot have a finite support mathematics support , but by choosing the function math f t math carefully, it is possible to design quadrature filters which are localized such that they can be approximated reasonably well by means of functions of finite support mathematics support . Applications Estimation of analytic signal Notice that the computation ... math omega math the magnitude of the response of a quadraturefilter equals the signal s amplitude A times the frequency function of the filter at frequency math omega math . math h t s q t frac 1 2 ... also Analytic signal Hilbert transform DEFAULTSORT QuadratureFilter Category Signal processing ... convolutions with the function math 1 over pi t math which is difficult to approximate as a filter ..., however, it is possible to obtain an analytic signal by convolving the signal math s t math with a quadraturefilter math q t math . Given that math q t math is designed with some care, it can be approximated by means of a filter which can be implemented in practice. The resulting function math .... Typically, math f t math is a band pass filter, removing low and high frequencies, but allowing ... signal of unknown frequency. By choosing a suitable frequency function Q of the filter, we may ... more details
Cleanup date May 2008 Unreferenced date December 2010 A polyphase quadraturefilter , or PQF , is a filter bank which splits an input signal into a given number N mostly a power of 2 of equidistant sub band s. These sub bands are subsampled by a factor of N, so they are critically sample signal sampled . This critical sampling introduces aliasing . Similar to the Modified discrete cosine transform MDCT time domain alias cancellation the aliasing of polyphase quadrature filters is canceled by neighbouring sub bands, i.e. signals are typically stored in two sub bands. Note that signal in odd subbands is stored frequency inverted . PQF filters are used in MPEG 1 Audio Layer I and MPEG 1 Audio Layer II II , Musepack which was based on MPEG 1 layer II , in MP3 MPEG 1 Layer III with an additional MDCT, in MPEG 4 AAC SSR for the 4 band PQF bank, in Spectral Band Replication MPEG 4 V3 SBR for the analysis of the upper spectral replicated band, and in Digital Theatre System DTS . PQF has an advantage over the very similar stacked quadraturemirrorfilter QMF . Propagation delay Delay is much lower, computational effort is much lower. A PQF filter bank is constructed using a base filter, which is a low pass filter low pass at fs 4N. This lowpass is modulated by a N cosine functions and converted to N band pass filter band passes with a Bandwidth signal processing bandwidth of fs 2N. The base lowpass is typically a n? finite impulse response FIR filter with a length of 10 N ... 24 N taps. Note that it is also possible to build PQF filters using recursive infinite impulse response IIR filters. PQF filter parameter Computation There are different formulas possible. Most of them are based on the modified discrete cosine transform MDCT but are slightly modified. Storing of frequencies in subbands Example for N 32 and fs 32 kHz. ... External links ... signal processing stub Category Digital signal processing Category Linear filters ... more details
2.60 input PSP Headset Compatible Syphon Filter Dark Mirror is a third person shooter video game ... on October 6, 2006. It is the sequel to Syphon Filter The Omega Strain . In Dark Mirror , a mysterious ... 2 syphon filter dark mirror 795164p2.html ref Multiplayer The game is Ad Hoc and Infrastructure compatible ... was announced for the PSP, Syphon Filter Logan s Shadow . It was released on October 2, 2007. ref Kelly, Kevin May May 17, 2007 , http www.joystiq.com 2007 05 17 syphon filter coming back to psp with new features Syphon Filter coming back to PSP with new features , joystiq.com ref A port of Dark Mirror ... Screenshot 16287 Syphon Filter Dark Mirror Screenshots 5 PlayStation.com Media Syphon Filter Dark Mirror Screenshots 7 Bot generated title ref Reception Syphon Filter Dark Mirror was critically acclaimed ... r PSP Syphon Filter 3A Dark Mirror review.asp?c 1417 Pocket Gamer 9 10 PSM Magazine ... 98641 Site Official Syphon Filter Dark Mirror Website http www.gamerankings.com htmlpages2 920798.asp GameRankings.com Syphon Filter Dark Mirror Reviews References Reflist Syphon Filter series Category ... Filter Category Terrorism in fiction Category Stealth video games fr Syphon Filter Dark Mirror it Syphon Filter Dark Mirror ... Physics series Syphon Filter series Syphon Filter version released PSP br vgrelease NA March 14, 2006 ... with a deeper operation that has him venturing across the world. Gameplay Unlike Syphon Filter ..., they lose. Story In continuation to the events of Syphon Filter The Omega Strain , Gabe sends ... role in the Syphon Filter conspiracy. Also revealed is a private meeting between Mara and Elsa ... Dark Mirror, the one she stole from KemSynth office in Iquitos , in exchange for Blake. Addison began ... known only as Project Dark Mirror, a nerve gas that could kill millions by fusing with oxygen molecules ... used to genetically engineer the nerve gas Dark Mirror. Addison re appears behind Gabe, telling ... more details
wiktionarypar quadratureQuadrature may refer to In signal processing Quadrature amplitude modulation QAM , a modulation method of using both an in phase carrier wave and a quadrature carrier wave that is 90 out of phase with the main, or in phase, carrier Quadrature phase , oscillations that are said to be in quadrature if they are separated in phase by 90 2, or 4 Quadraturefilter , the analytic signal of a real valued filterQuadrature phase shift keying QPSK , a phase shift keying of using four quadrate points on the constellation diagram, equispaced around a circle In mathematics Quadrature mathematics , drawing a square with the same area as a given plane figure squaring or computing that area Numerical integration is often called numerical quadrature or simply quadrature Gaussian quadrature , a special case of numerical integration In physics Optical phase space Quadratures In astronomy Quadrature astronomy , the position of a body moon or planet such that its elongation is 90 or 270 ie the sun earth body angle is 90 Quadrature may also refer to In motion control, quadrature encoder is a rotary encoder or linear encoder giving both the relative position and the direction of motion of a shaft disambig ca Quadratura de Quadratur Begriffskl rung es Cuadratura fr Quadrature it Quadratura ja Quadrature ru ... more details
In applied mathematics , adaptive quadrature is a process in which the integral of a function mathematics function math f x math is function approximation approximated using static Numerical integration quadrature rules on adaptively refined subintervals of the integration domain mathematics domain . Generally ... fail. General scheme Adaptive quadrature follows the general scheme 1. procedure integrate f ... is subdivided line 5 and the quadrature is applied on both halves separately line 6 . Either ... components are the quadrature rule itself math Q approx int a bf x , mbox d x , math the error .... The most common will be discussed later. Basic quadrature rules The quadrature rules generally ... strategy is used with Clenshaw Curtis quadrature , where the nodes are chosen as math x i cos left frac 2i n pi right math Or, when Clenshaw Curtis quadrature Fej r quadrature Fej r quadrature is used, math x i cos left frac 2 i 0.5 n 1 pi right math . Other quadrature rules, such as Gaussian quadrature or Gauss Kronrod quadrature formula Gauss Kronrod quadrature , may also be used. An algorithm may elect to use different quadrature methods on different subintervals, for example using a high order method only where the integrand is smooth. Error estimation Some quadrature algorithms generate ... has the form of the above quadrature rule, but whose value would be zero for a simple integrand for example ... see also Romberg s method Null rules Epsilon algorithm Subdivision logic Local adaptive quadrature ... quadrature. Global adaptive quadrature can be more efficient using fewer evaluations of the integrand ... on the current set of intervals. See also Adaptive Simpson s method for an example of adaptive quadrature QUADPACK , a FORTRAN library that uses global adaptive quadrature References http portal.acm.org ... for Adaptive Quadrature. Journal of the ACM 22 1 pp 61 82 January 1975 . Category Numerical integration quadrature ca Quadratura adaptativa ... more details
Quadrature historical mathematical term which means calculating of the area. Quadrature problems have served as one of the main sources of mathematical analysis . History Greek mathematics Mathematicians of Ancient Greece , according to the Pythagoreanism Pythagorean doctrine, understood calculation of area as the process of constructing geometrically a square geometry square having the same area squaring . That is why the process was named quadrature . For example, a Quadrature of the circle , Lune of Hippocrates , The Quadrature of the Parabola . This construction must be performed only by means of Compass and straightedge constructions compass and straightedge . File Mitjana geom trica amb teorema de l altura.PNG thumb left 220px center Antique method to find the Geometric mean center For a quadrature of a rectangle with the sides a and b it is necessary to construct a square with the side math x sqrt ab math the Geometric mean of a and b . For this purpose it is possible to use the following ... construction solves a problem of a quadrature for a parallelogram and a triangle. File Parabola ... of quadrature for curvilinear figures are much more difficult. The quadrature of the circle ... figures for example Lune of Hippocrates a quadrature can be performed. The quadratures of a sphere surface and a The Quadrature of the Parabola parabola segment done by Archimedes became the highest ... Archimedes used the Method of exhaustion of Eudoxus of Cnidus Eudoxus . In medieval Europe the quadrature ... for some algebraic curves and spiral s. Christiaan Huygens successfully performed a quadrature of some Solid of revolution Solids of revolution . The quadrature of the hyperbola by Saint Vincent and de ..., the term quadrature has become traditional, and instead the modern phrase computation of a univariate definite integral is preferred. See also Gaussian quadrature Hyperbolic angle Numerical integration ... of mathematics Category Mathematical terminology fr Quadrature math matiques ja ru ... more details
Multiple issues unreferenced October 2008 context October 2009 Quadrature modulation is the general technique of modulating two carriers. Examples include Quadrature amplitude modulation , Phase shift keying , and Minimum shift keying . Constellation diagram s are used to examine the modulation in the 2 D signal space. Explanation Sending a signal by amplitude modulation consists of sending the function math y t I t cdot cos omega c t math where math I t math is the signal to encode and math cos omega c t math is the carrier wave, math omega c math is the carrier frequency one is changing the amplitude of a carrier wave to encode the signal, hence amplitude modulation. In general one could also change the phase of the carrier wave, as in phase modulation there is a dimension of phase that is not being used. In fact, one can encode another signal that is 90 out of phase by using a sine wave, as in math z t I t cdot cos omega c t Q t cdot sin omega c t math this 90 the angle of a rectangle, or a 1 4 turn is why it is called quadrature modulation, and the symbols math I t math and math Q t math indicate the in phase signal and quadrature signal. In terms of Euler s formula , math e it cos t i sin t, math amplitude modulation encodes a 1 dimensional real signal, while quadrature modulation encodes a 2 dimensional complex signal. This viewpoint, that a wave of a given frequency can encode 2 dimensions of data, is elaborated in Fourier analysis , and is the principle that quadrature modulation exploits. Clocking The added channel capacity is not costless, however. An amplitude modulated ... pulse . A quadrature modulated signal, by contrast, has no such pulse, and thus sender and receiver ... uses quadrature amplitude modulation , this is conveyed by the color burst , a synchronization signal ... modulation Main Polar modulation Quadrature modulates two signals by changing the in phase and quadrature ... telegraph by Thomas Edison . See also Matrix decoder Polar modulation DEFAULTSORT Quadrature ... more details
In the branch of mathematics called potential theory , a quadrature domain in two dimensional real Euclidean space is a domain D an open set open connected space connected set together with a finite subset z sub 1 sub , , z sub k sub of D such that, for every function u harmonic function harmonic and integrable over D with respect to area measure, the integral of u with respect to this measure is given by a quadrature formula that is, math iint D u , dx dy sum j 1 k c j u z j , math where the c sub j sub are nonzero complex constants independent of u . The most obvious example is when D is a circular disk here k 1, z sub 1 sub is the center of the circle, and c sub 1 sub equals the area of D. That quadrature formula expresses the Harmonic function The mean value property mean value property of harmonic functions with respect to disks. It is known that quadrature domains exist for all values of k . There is an analogous definition of quadrature domains in Euclidean space of dimension d larger than 2. There is also an alternative, electrostatic interpretation of quadrature domains a domain D is a quadrature domain if a uniform distribution of electric charge on D creates the same electrostatic field outside D as does a k tuple of point charges at the points z sub 1 sub , , z sub k sub . Quadrature domains and numerous generalizations thereof e.g., replace area measure by length measure on the boundary of D have in recent years been encountered in various connections such as inverse problems of Newtonian gravitation , Hele Shaw flow s of viscous fluids, and purely mathematical isoperimetric problems, and interest in them seems to be steadily growing. They were the subject of an international conference at the University of California at Santa ..., published by Birkh user Verlag. References cite book last Ebenfelt first Peter title Quadrature ... last Aharonov first D. coauthors Shapiro, H.S. title Domains on which analytic functions satisfy quadrature ... more details
A phase shifting transformer , also quadrature booster quad booster for short , is a specialised form of transformer used to control the flow of real power on Three phase electric power three phase Electric power transmission electricity transmission networks. For an alternating current transmission line, power flow through the line is proportional to the sine of the difference in the phase angle of the voltage ... Edition, John Wiley and Sons, London, 1972, ISBN 0471924458 pages 127 128 ref Quadrature boosters ... favorable paths. The capital cost of a quadrature booster can be high as much as four to six million ... of operation Image Qb 3ph.svg thumb 425px right Simplified circuit diagram of a three phase quadrature ... is in Quadrature phase quadrature , and then re applied to it, a Polyphase system phase angle is developed across the quadrature booster. It is this induced phase angle that affects the flow of power through specified electrical network circuits . Arrangement A quadrature booster typically consists ... output voltage is hence the vector sum of the supply voltage and the 90 quadrature component. Tap transformer Tap connections on the shunt unit allow the magnitude of the quadrature component to be controlled, and thus the magnitude of the phase shift across the quadrature booster. The flow on the circuit containing the quadrature booster may be increased boost tapping or reduced buck ... a quadrature booster on a notional 100 MW generator load system with two parallel transmission line s, one of which features a quadrature booster shaded grey with a tap range of 1 to 19. In the left hand image, the quadrature booster is at its center tap position of 10 and has a phase angle of 0 ... MW. The right hand image shows the same network with the quadrature booster tapped down so to buck ... are hypothetical the actual phase angle and transfer in load would depend upon the parameters of the quadrature ... a quadrature booster The intended effect is opposite equalizing power on lines where naturally ... more details
Two periodic functions periodic waveforms whose Phase waves phase difference is math tfrac 1 4 math of their output period are said to have a quadrature phase relationship. The term is also used in communication systems to describe one of the components of Orthogonality orthogonal decomposition. A composite signal described by its envelope and phase form math A t cdot sin 2 pi ft phi t math can be decomposed to an equivalent quadrature carrier IQ form as math I t cdot sin 2 pi ft Q t cdot cos 2 pi ft I t cdot sin 2 pi ft Q t cdot sin 2 pi ft begin matrix frac pi 2 end matrix math where math f , math represents a carrier frequency , and math I t stackrel mathrm def A t cdot cos phi t , math math Q t stackrel mathrm def A t cdot sin phi t . , math math A t , math and math phi t , math represent possible modulation of a pure carrier wave math sin 2 pi f t . , math The modulation alters the original math sin , math component of the carrier, and creates a new math cos , math component, as shown above. The component that is in phase with the original carrier is referred to as the in phase component . The other component, which is always 90 math begin matrix frac pi 2 end matrix math radians Phase waves Phase difference out of phase , is referred to as the quadrature component . References reflist See also Phase waves In phase and quadrature I&Q components In phase and quadrature I&Q components Quadrature Quadrature amplitude modulation Constellation diagram Category Signal processing ... more details
In numerical analysis , a quadrature rule is an approximation of the integral definite integral of a function ... within the domain of integration. See numerical integration for more on quadrature rules. An n point Gaussian quadrature rule , named after Carl Friedrich Gauss , is a quadrature rule constructed ... i . math Gaussian quadrature as above will only produce accurate results if the function f x is well ... The section Other forms of Gaussian quadrature below links to this section For the integration ... 13 sqrt 70 900 math Change of interval for Gaussian quadrature An integral over a , b must be changed into an integral over 1, 1 before applying the Gaussian quadrature rule. This change of interval can ... 2 right ,dx math After applying the Gaussian quadrature rule, the following approximation is math int ... 1 sqrt 1 x 2 math Chebyshev polynomials first kind 25.4.38 Chebyshev Gauss quadrature align center 1, 1 math sqrt 1 x 2 math Chebyshev polynomials second kind 25.4.40 Chebyshev Gauss quadrature align center 0, math e x , math Laguerre polynomials 25.4.45 Gauss Laguerre quadrature align center , math e x 2 math Hermite polynomials 25.4.46 Gauss Hermite quadrature Fundamental theorem Let math p ... sub , then there exist n weights w sub i sub which make the Gauss quadrature computed integral exact ... math ell i x math of these particular n nodes x sub i sub . Computation of Gaussian quadrature rules For computing the nodes math x i math and weights math w i math of Gaussian quadrature rules ... ldots & ldots & ldots & 0 & A n 1 & B n 1 end array right . math The nodes of gaussian quadrature ... quadrature rule can be stated as follows harv Stoer Bulirsch 2002 loc Thm 3.6.24 . For an integrand ... approach is to use two Gaussian quadrature rules of different orders, and to estimate the error as the difference between the two results. For this purpose, Gauss Kronrod quadrature rules can be useful. Important consequence of the above equation is that Gaussian quadrature of order n is accurate for all ... more details
Image Parabolic Segment.svg thumb A parabolic segment. wiktionarypar quadrature The Quadrature of the Parabola is a treatise on geometry , written by Archimedes in the 3rd century BC. Written as a letter to his friend Dositheus, the work presents 24 propositions regarding parabola s, culminating in a proof that the area of a parabolic segment the region enclosed by a parabola and a line geometry line is 4 3 that of a certain inscribe d triangle. The proof uses the method of exhaustion . Archimedes dissects the area into infinitely many triangles whose areas form a geometric progression . He computes the sum of the resulting geometric series , and proves that this is the area of the parabolic segment. This represents the most sophisticated use of the method of exhaustion in ancient mathematics, and remained unsurpassed until the development of integral calculus in the 17th century, being succeeded by Cavalieri s quadrature formula . Main theorem Image Parabola and inscribed triangle.svg thumb Archimedes inscribes a certain triangle into the given parabolic segment. A parabolic segment is the region bounded by a parabola and line. To find the area of a parabolic segment, Archimedes considers a certain inscribed triangle. The base of this triangle is the given chord geometry chord of the parabola, and the third vertex is chosen so that the three vertical lines parallel to the axis of the parabola are equally spaced. The theorem is that the area of the parabolic segment is 4 3 that of the inscribed ... Image Quadrature Parabola Relative Sizes.svg center By extension, each of the yellow triangles has one ... Quadrature of the Parabola Revisited journal Mathematics Magazine volume 71 issue 2 month ... cite web last Casselman first Bill title Archimedes quadrature of the parabola url http www.math.ubc.ca ... 1 3 and 20 24, with commentary. commons category Quadrature of the Parabola DEFAULTSORT Quadrature ... of mathematics cs Kvadratura paraboly fr La quadrature de la parabole ... more details
In numerical analysis , Lebedev quadrature , named after Vyacheslav Ivanovich Lebedev , is an approximation to the surface integral of a function over a three dimensional sphere . The grid is constructed so to have octahedral symmetry octahedral rotation and inversion symmetry. The number and location of the grid points together with a corresponding set of integration weights are determined by enforcing the exact integration of polynomial s or equivalently, spherical harmonics up to a given order, leading to a sequence of increasingly dense grids analogous to the one dimensional Gaussian quadrature Gauss Legendre scheme. The Lebedev grid is often employed in the numerical evaluation of volume integrals in the spherical coordinate system , where it is combined with a one dimensional integration scheme for the radial coordinate. Applications of the grid are found in fields such as computational chemistry ref cite book last Koch first Wolfram coauthors Max C. Holthausen title A Chemist s Guide to Density Functional Theory publisher Wiley VCH location Weinheim date 2001 page 107 isbn 978 3 527 30372 4 ref and transportation theory . ref cite book last Marchuk first G. I. coauthors V. I. Lebedev title Numerical Methods in the Theory of Neutron Transport publisher Taylor & Francis date ... N. C. Handy and G. J. Laming date 1993 title Quadrature schemes for integrals of density functional ... 1975 title Values of the nodes and weights of ninth to seventeenth order Gauss Markov quadrature ... 5553 76 90100 2 ref ref cite journal last Lebedev first V. I. date 1977 title Spherical quadrature formulas ... 1992 title Quadrature formulas of orders 41, 47, and 53 for the sphere journal Russian Acad. Sci. Dokl ... A quadrature formula for the sphere of 59th algebraic order of accuracy journal Russian Acad. Sci ... V. I. coauthors D. N. Laikov date 1999 title A quadrature formula for the sphere of the 131st algebraic ... code for evaluating Lebedev grid points and weights Category Numerical integration quadrature ... more details
wiktionary Filterfilter filtering filters Filter may refer to tocright Chemistry, engineering and materials In chemistry, engineering, or household usage, a device to separate mixtures. See Filter aquarium , critical components of both freshwater and marine aquaria Filter chemistry , a device usually ... others through Filter paper , a semi permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or air Air filter , a device composed of fibrous ... Oil filter , a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil Pneumatic filter , a device which removes contaminants from a compressed air stream Water filter , removes impurities from water by means of a fine physical barrier, a chemical process ..., or to enhance, certain ranges of wavelengths colors of light. See Filter optics , including types Interference filter Dichroic filter Photographic filter , a camera accessory consisting of an optical filter that can be inserted in the optical path Infrared cut off filter , designed to reflect or block mid infrared wavelengths while passing visible light H alpha H alpha filter , a specific red visible spectral line created by hydrogen with a wavelength of 6562.8& 160 Chelsea filter Astronomical filter , a telescope accessory used to enhance the details of celestial objects. Turbulence modeling In turbulence modeling, a procedure to dampen or remove the highest frequencies of the flow Filter ... Filter signal processing , especially, Electronic filter , an electronic circuit which processes signals, for example to remove unwanted frequency components Digital filter , a system that performs mathematical operations to reduce or enhance certain aspects of a signal Analogue filter, a basic building block of signal processing much used in electronics, see Passive analogue filter development Computing In computing Filter higher order function , a higher order function that processes ... more details
unreferenced date April 2010 Infobox Website name The Filter favicon logo Image TheFilterLogo.jpg 169px screenshot caption url http www.thefilter.com commercial Yes type Entertainment, Website and Software registration Free. owner language English author launch date October 2006 current status revenue The Filter is a recommendation engine company with ties to musician Peter Gabriel . It was founded in 2004. Funding and staff The Filter is backed by Gabriel s Real World Records Real World Group and http www.edenventures.co.uk Eden Ventures . 8.5 million has been invested in the venture to date. The Filter was developed and founded by Hopkins and Ryder Who date April 2009 in Bath, England . David Maher Roberts joined as CEO in Autumn 2007 following a career in digital publishing. Ex Google CIO Douglas Merrill joined the Board in 2010. Awards In 2009 The Filter was selected by the UKTI https www.uktradeinvest.gov.uk UK Trade and Investment for its prestigious Digital Mission to SXSW in Austin, Texas. The CEO was also a panelist for the Collaborative Filtering panel hosted by Digg s Anton Kast. The company s continued success in building partnerships in the US was rewarded with selection for the Web 2.0 Digital Mission to New York in November. The Filter was a recipient of the Red Herring ... to do business in the US or potentially attract a US investor. The Filter has been awarded the OnHollywood .... The Filter was also chosen as one of only six finalists from over 600 entries in the Popkomm Innovation ... nbccom videos filter recommendations.html La Times http www.businessweek.com magazine content 10 16 ... up the filter GigaOm http news.bbc.co.uk 1 hi technology 7939413.stm The BBC http www.washingtonpost.com ... life lifestyle 2008 04 14 thefilter N.htm USA Today External links http www.thefilter.com The Filter official website http twitter.com thefilter The Filter on Twitter http blog.thefilter.com The Filter Blog References Reflist DEFAULTSORT Filter Category British websites Category Companies based in Bath ... more details
The Mirror may refer to In music The Mirror song The Mirror , a song by Dream Theater The Mirror Spooky Tooth album The Mirror Spooky Tooth album The Mirror Reloaded , an album by Ja Rule The Mirror band , a band that appeared on Beat Club In film and television anchor Film The Mirror 1999 film The Mirror 1999 film , a film by Agan The Mirror 1997 film The Mirror 1997 film , a film by Jafar Panahi The Mirror 1993 film I The Mirror 1993 film I , a film by Deepak Sareen The Mirror 1993 film II The Mirror 1993 film II , a film by Sergiu Nicolaescu The Mirror 1975 film The Mirror 1975 film , a film by Andrei Tarkovsky The Mirror 1974 film The Mirror 1974 film , a film by Nazrul Islam The Mirror 1967 film The Mirror 1967 film , a film by Qin Tao The Mirror 1913 film The Mirror 1913 film , a film by Anthony O Sullivan The Mirror The Twilight Zone The Mirror The Twilight Zone , an episode of The Twilight Zone The Mirror 2007 film The Mirror 2007 film , a film starring Kelly LeBrock The Mirror 2005 film The Mirror 2005 film , a film starring Robert Sedgwick actor Robert Sedgwick The Mirror 1917 film The Mirror 1917 film , a film starring Marjorie Rambeau The Mirror 1914 film The Mirror 1914 film , a film starring Charlotte Burton The Mirror 1911 film The Mirror 1911 film , a List of rediscovered films rediscovered film In publications Daily Mirror , a UK newspaper Montreal Mirror , a Quebec alternative weekly The Mirror Millhiser horror novel by Marlys Millhiser published in 1978 The Mirror UNC newspaper The Mirror UNC newspaper , the student newspaper for the University of Northern Colorado The Mirror Pakistani magazine The Mirror Pakistani magazine The Mirror , the campus newspaper of Lakeland College Wisconsin Lakeland College The Mirror , the newspaper of William Penn Charter School The Mirror , a book by T.B. Joshua The Mirror , a novelette by Nancy Farmer author The Mirror , a short story by Eiko Kadono See also Der Spiegel , a German newspaper Mirror disambiguation lookfrom ... more details
MirrorMirror may refer to TOCright Literature A famous phrase uttered by the wicked queen in Snow White Mirror, mirror on the wall... Mirror, Mirror novel , a 2003 novel by Gregory Maguire based on Snow White and the Seven Dwarfs Mirror, Mirror Bell novel Mirror, Mirror Bell novel , a 1996 novel by Hillary Bell based on the 1995 TV show of the same name MirrorMirror a history of the human love affair with reflection , a 2003 nonfiction book Film Mirror, Mirror 1990 film , a 1990 horror film Music MirrorMirror , a 1960 s song by Pinkerton s Assorted Colours MirrorMirror , a song by The Osmonds from their album The Plan MirrorMirror 10cc album MirrorMirror 10cc album , a 1995 album by British rock band 10cc MirrorMirror also known as MirrorMirror Mon Amour , a 1981 hit single by British pop duo Dollar band Dollar MirrorMirror Ghinzu album MirrorMirror Ghinzu album , a 2009 album by Belgian rock band Ghinzu MirrorMirror Dardanelles album MirrorMirror Dardanelles album , a 2007 album by Australian rock band Dardanelles MirrorMirror Blind Guardian song MirrorMirror Blind Guardian song , a song from the album Nightfall in Middle Earth MirrorMirror Diana Ross song MirrorMirror Diana Ross song , a song by Diana Ross from her 1981 album Why Do Fools Fall in Love MirrorMirror EP MirrorMirror EP , an EP by Twiztid Mirror, Mirror Look into My Eyes , a 1981 song by Def Leppard from the album High n Dry MirrorMirror , a song by the American power metal band Kamelot from their 2001 album Karma Kamelot album Karma MirrorMirror Kelly Price album MirrorMirror Kelly Price album , a 2000 album by Kelly Price Mirror, Mirror Diamond Rio song Mirror, Mirror Diamond Rio song , a song from the 1991 self titled album Diamond Rio MirrorMirror I See a Damsel , a song by Violent Femmes from their 1994 album New Times MirrorMirror M2M song MirrorMirror M2M song , a 2000 hit single by Norwegian pop duo M2M MirrorMirror , a song by LL Cool J from his 2002 album 10 LL Cool J ... more details
Infobox Album See Wikipedia WikiProject Albums Name In The Mirror Type compilation Artist Yanni Cover Yanni In The Mirror.jpg Released February 1998 Recorded Genre Instrumental music Contemporary instrumental br Easy listening br adult contemporary Soft adult contemporary Length 66 25 Label Private Music Producer Yanni Reviews http www.discogs.com Yanni In The Mirror release 567493 discogs Rating 3 5 Last album This album Next album In The Mirror is a 1998 album by Yanni released on the Private Music label. This is often billed as a Compilation of Yanni favorites ref name CDUniverse http www.cduniverse.com search xx music pid 1000782 a In The Mirror.htm CD Universe . CD Universe ref , including In the Mirror which is a solo piano piece and faster pace tracks such as Forbidden Dreams and Chasing Shadows ref name Amazon http www.amazon.co.uk dp B000024G9J Amazon . Amazon ref Track listing In The Mirror In The Morning Light Love For Life One Man s Dream Within Attraction Forbidden Dreams Once Upon A Time Chasing Shadows Aria Quiet Man Enchantment So Long My Friend Before I Go End Of August References Reflist Yanni Category Yanni albums Category New Age albums Category Instrumental albums Category 1998 compilation albums pt In the Mirror ... more details
Unreferenced stub auto yes date December 2009 Infobox Korean film name Into the Mirror image Into the Mirror movie poster.jpg caption Into the Mirror movie poster hangul director Kim Sung ho producer Kim Eun young writer Kim Sung ho starring Yoo Ji tae br Kim Hye na br Kim Myung min music Mun Dae hyeon cinematography Jeong Han cheol editing Kim Seon min distributor Cinema Service released August 14, 2003 br South Korea runtime 113 min. language Korean Into the Mirror is a 2003 in film 2003 South Korea n horror film about a series of Murder grisly deaths in a department store, all involving mirrors, and the troubled detective who investigates them. It was the debut film of director Kim Sung ho . The film was source for the 2008 US horror film Mirrors film Mirrors . The story was mostly changed, although the basic idea and some scenes remained intact. This film was released on side B of the Mirrors 2 DVD in the US. Plot After accidentally causing the death of his partner during a hostage situation, Wu Young min quits the police force to work for his uncle as head security of Dreampia, an immense shopping center. Dreampia is currently in the rebuilding stages as a fire destroyed parts of it five years ago. The re opening was scheduled in a few days, until some strange murders begin to occur in the building. It seems that the victims, all employees of the mall, have committed suicide in very gruesome and unconventional ways. Young min is very suspicious about the police explanation, and starts his own investigation, but unfortunately for him, an old acquaintance, Ha Hyun su, is in charge of the police investigation. Hyun su still blames Young min for the death of their friend and is not interested in cooperation. The more clues they stumble on, the more strange ... min as Ha Hyun su Cinema of Korea DEFAULTSORT Into The Mirror Category 2003 films Category South Korean ... film stub es Into the Mirror fr Into the Mirror it Into the Mirror ru ... more details
The mirror in the mirror. A Labyrinth is a collection of surreal short stories by Michael Ende originally published in 1984 . All stories in the book have their own protagonist s, but are related to each other by the use of literary leitmotiv s. None of the stories has its own title. Ende wrote the 30 short stories according to the dedication at the beginning of the book for his father Edgar Ende , whose artistic work the book is illustrated with 18 of his paintings inspired the short stories. Themes and motives The main motive of the collection is the question What is reflected in a mirror which is reflected in a mirror? ref name brief cite web url http www.oobe.ch ende02.htm title Exchange of correspondence with Michael Ende de icon ref Ende does not provide a clear answer to this question during the course of the book. In a letter, he stated that he intended the title to be taken as a metaphor for the relationship between reader and the book That brings me to the real reason for the title Where does that which happens during reading a book take place? ... Does not every reader, whether he wants it or not, bring ... his own experiences and thoughts into the process of reading? ... Is not every book a mirror in which the reader is reflected, whether he knows it or not? And is not every reader a mirror in which the book is reflected? ref name brief Recurring motives are the question about the purpose of life, a constant waiting for something which is never to happen, a search for freedom and the criticism of an inhuman society. The general tone of the stories is very dark and contains scenes of unexpected bloody violence, which sets the book apart from Ende s novels for children. Most of the stories do not allow for a clear interpretation instead, as Ende himself stated ... name brief Reception The Mirror in the Mirror was translated into 13 languages and was made into an audio ... Mirror in the Mirror Category 1984 books Category Single author short story collections de Der Spiegel ... more details
Image La Quadrature du Net.svg 163px right thumb La Quadrature du Net La Quadrature du Net is a France French advocacy group that promotes the digital rights and freedoms of citizens. More specifically, it advocates for the adaptation of French and European legislations to respect the founding principles of the Internet, most notably the free circulation of knowledge. To that aim, La Quadrature du Net engages in public policy debates concerning, for instance, freedom of speech, copyright, regulation of telecommunications and online privacy. J r mie Zimmermann , spokeperson and cofounder of La Quadrature du Net, is frequently invited to television programs and interviews to expose the opposition of the collective to the HADOPI law and the Telecoms Package . Philippe Aigrain , author of two books on information commons , is the other co founder of the collective. Name origin The name is based on the quadrature of the circle , an unsolvable mathematic problem. According to the collective it is impossible to effectively control the flow of information in the digital age by the law and the technology without harming public freedoms, and damaging economic and social development . The collective makes an analogy with the squaring of the circle as a problem that could take ages for people to realize is impossible to solve, as initially intended. ref http www.laquadrature.net en why the name squaring the net La Quadrature du Net Why the name Squaring the net ? ref See also April French association Network neutrality References reflist External links commons Category La Quadrature du Net Official http laquadrature.net http laquadrature.net support Support the association DEFAULTSORT Quadrature du Net, la Category Computer law Category Internet activism fr La Quadrature du Net ... more details
In numerical analysis , Gauss Jacobi quadrature is a method of numerical quadrature based on Gaussian quadrature . Gauss Jacobi quadrature can be used to approximate integrals of the form math int 1 1 f x 1 x alpha 1 x beta , mathrm d x math where is a smooth function on 1, 1 and , 1. The interval 1, 1 can be replaced by any other interval by a linear transformation. Thus, Gauss Jacobi quadrature can be used to approximate integrals with singularities at the end points. Gauss Legendre quadrature is a special case of Gauss Jacobi quadrature with 0. Similarly, Chebyshev Gauss quadrature arises when one takes . Gauss Jacobi quadrature uses x 1 x sup sup 1 x sup sup as the weight function. The corresponding sequence of orthogonal polynomials consist of Jacobi polynomials . Thus, the Gauss Jacobi quadrature rule on n points has the form math int 1 1 f x 1 x alpha 1 x beta , mathrm d x approx lambda 1 f x 1 lambda 2 f x 2 cdots lambda n f x n , math where x sub 1 sub , , x sub n sub are the roots of the Jacobi polynomial of degree n . The weights sub 1 sub , , sub n sub are given by the formula math lambda i frac 2n alpha beta 2 n alpha beta 1 frac Gamma n alpha 1 Gamma n beta 1 Gamma n alpha beta 1 n 1 frac 2 alpha beta P n x i P n 1 x i , math where denotes the Gamma function and P sub n sub the Jacobi polynomial of degree n . References Citation last1 Rabinowitz first1 Philip author1 link Philip Rabinowitz mathematician title A First Course in Numerical Analysis publisher Dover Publications location New York edition 2nd isbn 978 0 486 41454 6 year 2001 chapter 4.8 1 Gauss Jacobi quadrature . Category Numerical integration quadrature ... more details
Summary Two square waves in quadrature. Drawn to match the Gray code chart in Rotary encoder . In this diagram, clockwise rotation is towards the right, and counter clockwise to the left. Licensing PD self date October 2007 ... more details
Tanh Sinh quadrature is a method for numerical integration introduced by Hidetosi Takahasi and Masatake ... math w k frac tfrac12 h pi cosh kh cosh 2 tfrac12 pi sinh kh . math Like Gaussian quadrature , Tanh Sinh quadrature is well suited for arbitrary precision arithmetic arbitrary precision integration, where ... of correct digits. Tanh Sinh quadrature is less efficient than Gaussian quadrature for smooth integrands, but unlike Gaussian quadrature tends to work equally well with integrands having singularities ... log n for Gaussian quadrature. Upon comparing the scheme to Gaussian quadrature and error function quadrature , Bailey et al. 2005 found that the Tanh Sinh scheme appears to be the best for integrands ... research on Tanh Sinh quadrature, Gaussian quadrature and error function quadrature, as well as several of the classical quadrature methods, and found that the classical methods are not competitive ... paper July 2004 comparing Tanh Sinh quadrature with Gaussian quadrature and error function quadrature ... excellent accuracy with fast run times. It is the nearest we have to a truly all purpose quadrature scheme at the present time . Bailey 2006 found that The Tanh Sinh quadrature scheme is the fastest known high precision quadrature scheme , especially when the time for computing abscissas and weights is considered. It has been successfully employed for quadrature calclculations of up to 20,000 ... sinh.pdf Tanh Sinh High Precision Quadrature . 2006 . David H. Bailey, Karthik Jeyabalan, and Xiaoye ... quadrature schemes . Experimental Mathematics , 14.3 2005 . David H. Bailey and Xiaoye S. Li, ftp ftp.inria.fr INRIA publication publi pdf RR RR 5281.pdf A Comparison of Three High Precision Quadrature ... of Double Exponential quadrature techniques developed by Takahasi and Mori in 1974. Full open source ... 2011 03 07 double exponential quadrature Double Exponential Quadrature . A Microsoft Excel workbook ..., along with extensive documentation. Category Numerical integration quadrature ... more details
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