Image Parabola with focus and arbitrary line.svg thumb 300px Parallel waves coming in to a parabolic mirror are focused at a point F A parabolicreflector or dish or mirror is a Mirror reflective device ... Energy Center in Israel.jpg thumb One of the world s largest solar parabolic dishes at the Ben Gurion National Solar Energy Center in Israel . The parabolicreflector functions due to the geometric properties ... century. Applications The most common modern applications of the parabolicreflector are in satellite ... , Parabolic aluminized reflector light PAR Cans and LED housings. ref http farside.ph.utexas.edu ... 2007 07 14 ref The Olympic Flame has been lit using a parabolicreflector concentrating sunlight ... thumb Parabolic mirror wok with optical illusion A parabolicreflector pointing upward can be formed ... also Parabola Parabolic antenna Parabolic trough Paraboloid Spherical reflector Toroidal reflector Solar ... of a parabolicreflector http vzone.virgin.net ljmayes.mal var parabola.htm Algorithm and spreadsheet ... parabolic reflectors. DEFAULTSORT ParabolicReflector Category Mirrors de Parabolspiegel fr Miroir ... paraboloid , that is, the surface generated by a parabola revolving around its axis. The parabolicreflector transforms an incoming plane wave traveling along the axis into a spherical wave converging ... is transformed into a plane wave propagating as a collimated beam along the axis. Parabolic reflectors .... ref thus correcting spherical aberration found in simpler spherical reflector s. Since the principles of Specular reflection reflection are reversible, parabolic reflectors can also be used to project ... at the focus F of a parabolic mirror yields a perfectly parallel beam of light, after the light has ... be reflected in this way, parabolic reflectors can be used to collect and concentrate energy entering the reflector at a particular angle. Similarly, energy radiating from the focus to the dish can be transmitted ... reflector s, which suffer from a spherical aberration that becomes stronger as the ratio of the beam ... more details
Image Par30.jpg thumb 250px right A Parabolic Aluminized Reflector luminaire Image Stage lights.jpg thumb right 20 PAR cans A parabolic aluminized reflector lamp also PAR light , PAR can , or simply PAR is a type of electric lamp that is widely used in commercial, residential, and transportation illumination. Usage includes locomotive headlamps, aircraft landing lights, and residential and commercial recessed light s cans in the United States . They are identical in principle to sealed beam automobile headlights . This article covers only their use in stage lighting . The lamps and their fixtures are widely used in theatre , concerts and motion picture film production production when a substantial amount of flat lighting is required for a scene film scene . They are frequently used in patterns of multiple lights such as 3 by 3 known as a nine light when large areas are to be lit. In situations where sunlight or other specular light is available, a white foam Reflector photography reflector is often used to accomplish the same effect as a PAR array. PAR cans are being replaced in some applications by LED stage lighting LED PAR cans , which use less electric power and produce a wide array ... used in the game of golf . Beam width Depending the parabolicreflector geometry and placement ... PAR lights possess a Lens optics lens and reflector that are integral parts of the lamp, the position ... as a cheaper alternative as the lamp is replaced but the reflector remains. Lamps such as the 500 ... this is integral to the Raylite reflector, although some Raylite reflectors have tails which then require ..., the diameter of the light spot is defined by the aluminium reflector, and cannot be adjusted without ... used in aviation, before being used on stage for light path effects. Raylite reflector Raylite ... quartz halogen lamp is used in place of the reflector lamp. A spider or bulb shield may optionally ... PAR , combining the attributes of the PAR can and an ellipsoidal reflector spotlight . Other attachments ... more details
wiktionary Parabolic usually refers to something in a shape of a parabola . Parabolic may refer to In mathematics Parabolic cylinder function Parabolic induction Parabolic Lie algebra Parabolic partial differential equation In geometry Parabolic coordinates Parabolic cylindrical coordinates Parabolic geometry Fermat s spiral Parabolic spiral In physics Parabolic trajectory In technology Parabolic antenna Parabolic microphone ParabolicreflectorParabolic trough a type of solar thermal energy collector In commodities and stock markets Parabolic SAR a chart pattern in which prices rise or fall with an increasingly steeper slope disambig ... more details
wiktionary reflector TOC right Reflector may refer to Science Reflector, a device that causes reflection for example, a mirror or a retroreflector Reflector photography , used to control lighting contrast Reflecting telescope Reflector antenna , the part of an antenna that reflects radio waves Reflector cipher machine , a component of some rotor machines a type of cipher machine , such as the Enigma machine, that sends electrical impulses that have reached it from the machine s rotors, back in reverse order through those rotors Reflector , the newsletter of the Boston section of the Institute of Electrical and Electronics Engineers Reflector, in math, the left adjoint in a reflective subcategory Neutron reflector , in physics Computing .NET Reflector , code browser utility Reflector, in an electronic mailing list , a single email address that reflects sends remails a copy of an email sent to it to other email addresses Reflector router , used in a distributed reflected denial of service attack DRDoS Music Reflector Pablo Cruise album Reflector Pablo Cruise album , a 1981 album by Pablo Cruise Reflector Killing Heidi album Reflector Killing Heidi album , a 2000 album by Killing Heidi Reflector PlanetShakers album Reflector PlanetShakers album , a 2002 album by PlanetShakers Reflector band , a rock band based in Beijing Other Reflector newspaper , the student newspaper of Mississippi State University Reflector Transformers , a fictional character Decepticon in the Transformers toyline of the 1980s See also lookfrom intitle Reflection disambiguation disambig cs Reflektor de Reflektor io Reflektoro nl Reflector ja ru sk Reflektor ... more details
Parabolicreflector In a parabolic reflecting loudspeaker, one or more speaker drivers are mounted at the focal point of a parabola , pointing away from the audience, toward the parabolic surface. ref name Borgerson2005 The sound is bounced off the parabolic dish and leaves the dish focused in plane ... of the parabolic dish. ref name MeyerSB1 A parabolicreflector type of loudspeaker must have a diameter ... driver loudspeaker is typically higher than a reflector type parabolic dish due to the increased ... use of a parabolicreflector in directing sound energy as a weapon was the Luftkanon designed ... range of 800 1500 pulses per second. The parabolicreflector was convert 3.2 m ft 1 in diameter ...A parabolic loudspeaker is a loudspeaker which seeks to focus its sound in coherent plane wave s either by reflecting sound output from a speaker driver to a parabolicreflector aimed at the target audience, or by arraying drivers on a parabolic surface. The resulting beam of sound travels farther, with less ..., November 1, 2005. Retrieved on August 25, 2009. ref The parabolic loudspeaker has been used for such diverse ... . Technology A parabolic loudspeaker can send sound farther than traditional loudspeaker designs. The focused waves of a parabolic loudspeaker tend to dissipate in air at about 3 Decibel dB SPL ... to 20 Hertz Hz , the dish would have to be over convert 50 ft m 0 wide. Limitations of parabolicreflector loudspeakers include the fact that they are comparatively large and bulky, and that they have ... driver prevents the center of the parabolic dish from reflecting sound outward, as that sound ... of the parabolic dish, or damping material placed, such that no sound is reflected directly at the speaker driver. Parabolic source A loudspeaker can be constructed with multiple speaker drivers arrayed on the surface of a parabolic dish. This type of loudspeaker does not reflect sound it aims sound directly at the audience. ref name MeyerSB2 As in non parabolic arrays of drivers, the signal ... more details
unsourced article date May 2008 Image ParabolicMicrophone.jpg thumb right Parabolic microphone used at an American college football game. A parabolic microphone is a microphone that uses a parabolicreflector to collect and focus sound waves onto a receiver, in much the same way that a parabolic antenna e.g., satellite dish does with radio wave s. Typical uses of this microphone, which has unusually focused front sensitivity and can pick up sounds from many meters away, include nature sound recording recording , field audio for sports broadcasting, eavesdropping , law enforcement, and even espionage . Parabolic microphones are generally not used for standard sound recording recording applications because they tend to have poor low frequency response as a side effect of their design. This is a direct result of the physical laws that govern sound waves. Parabolas only focus waves with a wavelength much smaller than the diameter of the parabola. why? Since sound waves travel at 342 m s through the air speed of sound , obtaining hi fidelity sound down to 20 Hz, the lower limit of human hearing would require a parabola with a diameter greater than 17 meters 342 m s 20 Hz . Most parabolic microphones sacrifice low end fidelity to get a more manageable size. See also Acoustic location Acoustic mirror External links http headwize.com projects showfile.php?file noise prj.htm Do it yourself parabolic microphone site 1 http www.solorb.com elect misc bige Do it yourself parabolic microphone site 2 http www.bambooturtle.us ParabolicMicrophone.html Dollar Store Parabolic Microphone Category Microphones Category Surveillance Category Covert listening devices electronics stub es Micr fono parab lico fa ... more details
members. Deviations in reflector surfaces cause non uniform aperture distributions, resulting in reduced gains. The standard symmetrical, parabolic, Cassegrain reflector system is very popular ...Merge to Passive radiator discuss Talk Reflector antenna date November 2010 Multiple issues unreferenced October 2008 confusing October 2008 Image Satellite dish 1 C Band.jpg thumb Parabolicreflector as part of a Satellite dish Image Parabolic antenna types2.svg thumb Types of parabolic antennas An antenna reflector is a device that Reflection physics reflects electromagnetic wave s. It is often a part of an antenna radio antenna assembly. The most common reflector types are a passive radiator passive element slightly longer than and located behind a radiating dipole element that absorbs and re radiates the signal in a directional way as in a Yagi Uda antenna Yagi antenna array. corner reflector which reflects the incoming signal back to the direction it came from parabolicreflector which focuses a beam signal into one point, or directs a radiating signal into a beam flat reflector which just reflects the signal like a mirror and is often used as a passive repeater Design criteria Parameters ... part of the feed antenna radiation misses the reflector Aperture blockage also known as feed blockage ... beam Illumination taper Reflector surface deviation Defocusing Cross Polarization waves polarization ... to reducing gain. Aperture blockage and deviation of reflector surface from the designed ideal are two ... of this configuration is blockage by the hyperbolic sub reflector and its supporting struts usually 3 4 are used . The blockage becomes very significant when the size of the parabolicreflector is small compared to the diameter of the sub reflector. To avoid blockage from the sub reflector asymmetric ... of the main reflector surface and diffraction , a microwave absorber is sometimes employed. This lossy ... Reflector Antenna Category Radio frequency antenna types Category Satellite television he ... more details
a Cassegrain type feed. A parabolic antenna is an antenna radio antenna that uses a parabolicreflector ... Heinrich Hertz constructed the world s first parabolicreflector antenna in 1888. The antenna was a cylindrical parabolicreflector made of zinc sheet metal supported by a wooden frame, and had a spark ... source of radio waves at the Focus optics focal point in front of a parabolicreflector will be reflected .... A typical parabolic antenna consists of a parabolicreflector with a small feed horn feed antenna ... antenna Cassegrain and Gregorian, a secondary reflector is used to direct the energy into the parabolic ... of the parabolicreflector math d math is the diameter of the parabolicreflector math lambda ... reflector spherical rather than a parabolic shape. A spherical reflector does not have a single ... dish Simulsat a quasi parabolic antenna which is spherical reflector spherical in one plane and parabolic ...Image Erdfunkstelle Raisting 2.jpg 250px thumb A parabolic antenna at Erdfunkstelle Raisting , the biggest ... common form is shaped like a Dishware dish and is popularly called a dish antenna or parabolic dish . The main advantage of a parabolic antenna is that it is highly Directivity directive it functions analogously to a searchlight or flashlight reflector to direct the radio waves in a narrow beam, or receive radio waves from one particular direction only. Parabolic antennas have some of the highest ... satellite television dishes, parabolic antennas have become a ubiquitous feature of the modern landscape ..., and radio telescope s. History The idea of using parabolic reflectors for radio antennas was taken from optics , where the power of a parabolic mirror to focus light into a beam has been known since classical antiquity . The designs of some specific types of parabolic antenna, such as the Cassegrain ... ref The first parabolic antenna used for satellite communications was established in 1962 at Goonhilly ... . Types Image Parabolic antenna types2.svg thumb Main types of parabolic antenna feeds. Parabolic ... more details
disambig Parabolic constant can refer to Universal parabolic constant , a mathematical constant Parabolic rate constant , a parameter of the Deal Grove model Long comment to avoid being listed on short pages ... more details
A toroidal mirror is a form of parabolicreflector which has a different focal distance depending on the angle of the mirror. The curvature is actually that of an elliptic paraboloid with math a ne b math . If the shape were that of a toroid , the mirror would exhibit Aberration in optical systems spherical aberration . Toroidal mirrors are used in Yolo telescope s and optical monochromator s mirrors C and E in the diagram . In these devices, the source and detectors of the light are not located on the optic axis of the mirror, so the use of a true paraboloid of revolution would cause a distorted image. See also List of telescope types External links http bhs.broo.k12.wv.us homepage alumni dstevick erwin c.htm Toroidal mirrors for Yolo telescopes Category Mirrors Category Telescope types astronomy stub optics stub ... more details
Wiktionary Parabolic geometry may refer to Euclidean geometry , where Euclidean space is viewed as the natural representation space of the group of Euclidean motions math E n O n ltimes mathbb R n math The geometry of a Riemannian manifold admitting no positive Green s function Parabolic geometry differential geometry The homogeneous space defined by a semisimple Lie group modulo a parabolic subgroup, or the curved analog of such a space Disambig ... more details
broad spread of light Parabolicreflectorparabolic , providing a tighter, Parallel geometry parallel beam of light. The reflector factor is the ratio of the illumination provided by a lamp fitted within a reflector to the illumination provided without any reflector fitted. A matte reflector will typically have a reflector factor of around 2, due to its more diffuse effect, while a polished or metallic finished reflector may have a factor of up to 6 ref http www.google.es books?id CU7 2ZLGFpYC ...Image SVLightWithFlexReflect.jpg thumb 275px A traditional umbrella style reflector, used to diffuse light from a photographic lamp to which it is normally attached. In photography and cinematography , a reflector is an improvised or specialised reflective surface used to redirect light towards a given subject or scene. Types Apart from certain highly specialized components found in enlarger s, slide projector projectors and film scanner scanners , photographic reflectors fall into two main groups Lamp reflectors Image Reflector.png thumb Diagram of a lamp reflector, showing path that light typically takes from a light source. Similar to a domestic lampshade , these reflectors are fixed to an artificial light source for example, a Electrical filament filament light bulb bulb or Xenon flash ... or bounce board s, this kind of reflector is located independent of a light source the light is reflected ..., or both. This kind of reflector generally has a very low reflectivity factor that varies widely ..., which may or may not retain a direct path to the scene. By positioning a board reflector close ... . A very common example of this technique is the traditional umbrella reflector, typically having a gold, silver or matte white interior onto which a lamp fitted with a circular reflector is projected ... thumb A portable folding reflector positioned to bounce sunlight onto a model Reflectors ..., lightweight, collapsible reflector, commercially available in a range of sizes and colors ... more details
or both . The classic Cassegrain configuration uses a parabolicreflector as the primary while ... of the special properties of parabolic and hyperbolic reflectors. A concave parabolicreflector will reflect ... Cassegrain reflector which has two hyperbolic mirrors instead of a parabolic primary . It is free ...File Cassegrain.en.png thumb 300px Light path in a Cassegrain reflecting telescope. The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror , often used in optical telescope s and Antenna radio radio antenna s. In a symmetrical Cassegrain both mirrors are aligned about the optical axis , and the primary mirror usually contains a hole in the centre thus permitting the light to reach an eyepiece , a camera , or a light detector . Alternatively, as in many ... for ease of manufacturing. The Cassegrain reflector is named after a published reflecting telescope ... File Cassegrain Telescope.svg center thumb 500px Light path in a Cassegrain reflector telescope The Classic Cassegrain The Classic Cassegrain has a parabolic primary mirror, and a hyperbolic secondary ... hyperbolic reflector has two foci and will reflect all light rays directed at one of its two ... at which the image is to be observed, usually just outside the eyepiece. The parabolic mirror reflects ... reflector , also known as kutter telescope after its inventor Anton Kutter ref http www.telescopemaking.org ... axis, unobstructed design and variant of the cassegrain is the YOLO reflector invented by Arthur Leonard. This design uses a spherical or parabolic primary and a mechanically warped spherical secondary ... associated with cassegrain and newtonian reflector astrophotography. Catadioptric Cassegrains Schmidt ... Cassegrain File Diagram Reflector KlevtsovCassegrain.svg right thumb Light path in a Klevtsov Cassegrain ... sub reflector serves to focus radio frequency signals in a similar fashion to optical telescopes ... frequency propagation Category Telescope types ca Reflector Cassegrain de Cassegrain Teleskop es Telescopio ... more details
In mathematics, parabolic induction is a method of constructing group representation representation s of a reductive group from representations of its parabolic subgroup s. If G is a reductive algebraic group and math P MAN math is the Langlands decomposition of a parabolic subgroup P , then parabolic induction consists of taking a representation of math MA math , extending it to P by letting N act trivially, and induced representation inducing the result from P to G . There are some generalizations of parabolic induction using cohomology , such as cohomological parabolic induction and Deligne Lusztig theory . Philosophy of cusp forms The philosophy of cusp forms was a slogan of Harish Chandra , expressing his idea of a kind of reverse engineering of automorphic form theory, from the point of view of representation theory . ref Daniel Bump, Automorphic Forms and Representations 1998 , p. 421. ref The discrete group fundamental to the classical theory disappears, superficially. What remains is the basic idea that representations in general are to be constructed by parabolic induction of cuspidal representation s. ref See Daniel Bump, Lie Groups 2004 , p. 397. ref A similar philosophy was enunciated by Israel Gelfand , ref Citation first I. M. last Gelfand title Automorphic functions and the theory of representations work Proceedings, International Congress of Mathematicians location Stockholm year 1962 pages 74 85 . ref and the philosophy is a precursor of the Langlands program . A consequence for thinking about representation theory is that cuspidal representation s are the fundamental class of objects, from which other representations may be constructed by procedures of induction. According to Nolan Wallach ref http www.math.ucsd.edu nwallach luminy port2.pdf PDF , p.80 ... classes of Q rational parabolic subgroups one should construct automorphic functions from objects ... terms for an source says and element of the given class give all constant terms for this parabolic ... more details
Image Parabolic coords.svg thumb right 384px Parabolic coordinates are a two dimensional orthogonal coordinates orthogonal coordinate system in which the Coordinate system Coordinate line coordinate lines are confocal parabola s. Parabolic cylindrical coordinates A three dimensional version of parabolic coordinates is obtained by rotating the two dimensional coordinate system system about the symmetry axis of the parabolas. Parabolic coordinates have found many applications, e.g., the treatment of the Stark effect and the potential theory of the edges. Two dimensional parabolic coordinates Two dimensional parabolic coordinates math sigma, tau math are defined by the equations math x sigma tau , math math y frac 1 2 left tau 2 sigma 2 right math The curves of constant math sigma math form confocal parabolae math 2y frac x 2 sigma 2 sigma 2 math that open upwards i.e., towards math y math , whereas the curves of constant math tau math form confocal parabolae math 2y frac x 2 tau 2 tau 2 math that open downwards i.e., towards math y math . The foci of all these parabolae are located at the origin. Two dimensional scale factors The scale factors for the parabolic coordinates math sigma ... formulae found in orthogonal coordinates . Three dimensional parabolic coordinates Image Parabolic coordinates 3D.png thumb right 300px Coordinate system Coordinate surface Coordinate surfaces of the three dimensional parabolic coordinates. The red paraboloid corresponds to 2, the blue ... roughly 1.0, 1.732, 1.5 . The two dimensional parabolic coordinates form the basis for two sets of three dimensional orthogonal coordinates . The parabolic cylindrical coordinates are produced ... a set of confocal paraboloids, forming a coordinate system that is also known as parabolic coordinates ... DE year 1988 chapter Parabolic Coordinates , , title Field Theory Handbook, Including Coordinate ... http mathworld.wolfram.com ParabolicCoordinates.html MathWorld description of parabolic coordinates ... more details
File Solar troughs in the Negev desert of Israel.jpg thumb 244px Array of parabolic troughs at the National Solar Energy Center in Israel. Image Parabolic trough.svg 244px thumb right A diagram of a parabolic trough solar farm top , and an end view of how a parabolic collector focuses sunlight onto its focal point. A parabolic trough is a type of solar thermal energy collector. It is constructed as a long parabolic mirror usually coated silver or polished aluminum with a Dewar tube running its length at the Focus optics focal point . Sunlight is reflected by the mirror and concentrated on the Dewar tube. The trough is usually aligned on a north south axis, and rotated to track the sun as it moves across the sky each day. Alternatively the trough can be aligned on an east west axis, this reduces the overall efficiency of the collector, due to cosine loss, but only requires the trough to be aligned with the change in season s, avoiding the need for tracking motors. This tracking method works correctly at the spring and fall equinox es with errors in the focusing of the light at other times ... also reaches a minimum at solar noon. Due to these sources of error, seasonally adjusted parabolic ... concentrated solar power parabolic trough index.html Absorber tube temperature ref The heat ... . ref Patel99 Ch.9 ref Current commercial plants utilizing parabolic troughs are hybrids ... meter of area varies enormously. Types of mirrors Usually, mirrors are used which are parabolic and are of a single piece. In addition, V type parabolic troughs exist which are made from 2 mirrors ... parabolic troughs ref Mirror coatings In 2009, scientists at the National Renewable Energy Laboratory ... ref and has a nominal output of 49.9 MW. Popular culture A parabolic trough solar plant appears ... rea news article 2007 05 picture perfect parabolic solar collector systems 48660 Picture Perfect Parabolic Solar Collector Systems , Renewable Energy News Article DEFAULTSORT Parabolic ... more details
to the radial position of orbiting body on the parabolic trajectory math v sqrt 2 cdot v o math ... Under standard assumptions, specific orbital energy math epsilon , math of parabolic trajectory is zero ... 0 math C 3 0 math Radial parabolic trajectory A radial parabolic trajectory is a non periodic Radial ... also there is a navbox, such list was redundant orbits DEFAULTSORT Parabolic Trajectory Category Astrodynamics ... more details
Image PARSAR EBAY 2002.gif thumb right 350px Parabolic SAR for Ebay during 2002. Confusing date February 2009 In the field of technical analysis , Parabolic SAR SAR stop and reverse is a method devised by J. Welles Wilder, Jr. , to find trends in market price s or security finance securities . It may be used as a Stop loss order trailing stop loss based on prices tending to stay within a parabola parabolic curve during a strong trend. The concept draws on the idea that time is the enemy similar to option theory s concept of time decay , and unless a security can continue to generate more profits over time, it should be liquidated. The indicator generally works well in trending markets, but provides whipsaws during non trending, sideways phases as such, Wilder recommended establishing the strength and direction of the trend first through the use of things such as the Average Directional Index , and then using the Parabolic SAR to trade that trend. A parabola below the price is generally Bull Market bullish , while a parabola above is generally Bear Market bearish . Construction The Parabolic SAR is calculated almost independently for each Market trends trend in the price. When the price is in an uptrend, the SAR appears below the price and converges upwards towards it. Similarly, on a downtrend, the SAR appears above the price and converges downwards. At each step within a trend, the SAR is calculated ahead of time. That is, tomorrow s SAR value is built using data available today. The general formula used for this is math SAR n 1 SAR n alpha EP SAR n math Where math SAR n math ... links http www.onlinetradingconcepts.com TechnicalAnalysis ParabolicSAR.html Using Parabolic SAR for Buy and Sell signals, and placing Stop Loss orders http www.informedtrades.com 4559 how trade parabolic sar forex futures stocks.html How to Trade Parabolic SAR InformedTrades http biz.yahoo.com charts ... 0894590276 location Greensboro, NC technical analysis Category Chart overlays id Parabolic SAR ru ... more details
Merge to safety reflector date August 2010 Cleanup date December 2007 File Red Bike Reflector.jpg thumb File Corner reflector.svg alt Corner reflector.svg thumb right The Corner Reflector reflects light back towards the source. The bicycle reflector or prism reflector is a common safety device found on the rear, front and wheels of bicycles. It uses the principle of retroreflection to alert another road user of the bicycle s presence on the road. The reflector is usually manufactured in the form of a moulded tile of transparent plastic. The outside surface is smooth, allowing light, such as from a car s headlights, to enter. The rear surface of the tile takes the form of an array of angled micro prisms or spherical beads. The light striking the rear, inside surface of the prisms or beads, does so at an angle greater than the critical angle thus it undergoes total internal reflection . Due to the orientation of the other inside surfaces, any light internally reflecting is directed back out the front of the reflector in the direction it came from. This alerts the person close to the light source, e.g. the driver of the vehicle, to the presence of the cyclist. ref Hyperphysics.phy astr.gsu.edu ref ref Complete physics, Stephen Pople 1999 ref References reflist Bike equipment DEFAULTSORT Bicycle Reflector Category Bicycle parts Reflector Category Safety equipment ... more details
italic title Image Gospel Reflector 1841.jpg right thumb 150px First issue of The Gospel Reflector January, 1841. The Gospel Reflector was the first independent Mormon periodical. It was published by Benjamin Winchester , the Branch president president of the Philadelphia Branch Latter Day Saints Branch of the Church of Christ Latter Day Saints Church of Jesus Christ of Latter Day Saints . The Gospel Reflector was published bi weekly beginning in January 1841 and ending with the twelfth edition in June 1841. See also List of Latter Day Saint periodicals External links http patriot.lib.byu.edu cdm4 document.php?CISOROOT NCMP1820 1846&CISOPTR 6029&REC 19 The Gospel Reflector scanned PDF of original LDSChurchpubs Category Defunct newspapers of the United States Category Latter Day Saint periodicals Category Publications established in 1841 Category Publications disestablished in 1841 Category Latter Day Saint movement in Pennsylvania LDS stub Christian mag stub ... more details
A block reflector is an orthogonal, symmetric matrix that reverses a subspace whose dimension may be greater than one. see abstract here http locus.siam.org SINUM volume 25 art 0725014.html It is built out of many elementary reflector s. It is also referred to as a triangular factor , and is a triangular matrix and they are used in the Householder transformation . A reflector math Q math belonging to math mathcal M n R math can be written in the form math Q I auu T math where math I math is the identity matrix for math mathcal M n R math , math a math is a Scalar mathematics scalar and math u math belongs to math mathcal R n math . LAPACK routines Here are some of the LAPACK routines that apply to block reflectors larft forms the triangular vector T of a block reflector H I VTVH. larzb applies a block reflector or its transpose conjugate transpose as returned by tzrzf to a general matrix mathematics matrix . larzt forms the triangular vector T of a block reflector H I VTVH as returned by tzrzf . larfb applies a block reflector or its transpose conjugate transpose to a general rectangular matrix. See also Reflection mathematics Householder transformation Unitary matrix Triangular matrix Category Matrices algebra stub compu prog stub ... more details
Unreferenced date November 2009 Merge from bicycle reflector date August 2010 Image safety reflector.jpg thumb 200px right Star shaped safety reflector with string and safety pin A safety reflector is a retroreflector intended for pedestrian s, running runners , bicyclist s, motorcyclist s, and vehicle s. A safety reflector is similar to reflective stripes that can be found on safety vest s and clothing worn by road workers and rescue workers. They are sometimes erroneously called luminous badges or luminous tags, but this is incorrect as they do not themselves produce light, but only reflect it. A safety reflector helps to make a person or vehicle visible to other people and vehicles on the road up to three times further away than without a reflector, since it reflects light from headlight s of an oncoming vehicle. Safety reflectors are especially useful in rural areas where there are no streetlight s. Unlike reflective stripes that are permanently fixed to clothing, the safety reflector is a stand alone device that can be attached to any article of clothing as needed, often using a safety pin and some string. For vehicles, the reflector is usually a fixed part. In bicycles, reflectors are usually on wheels, pedals, under the seat, on the back of the luggage rack, and in front of the front fork. In motorcycles, automobiles, and other vehicles, reflectors are built into the front and rear ends and sides next to the headlights and breaklights. The reflector is claimed By whom date November 2009 to be a Finland Finnish creation, invented by a farmer from Pertteli , a small township in Western Finland. Interestingly enough, the inventor did not consider pedestrian safety when .... gallery File Red Bike Reflector.jpg Bicycle reflector File City bike reflectors.jpg Multiple bicycle reflectors File Headlights projector reflector optics.jpg Car reflector gallery See also Bicycle reflector DEFAULTSORT Safety Reflector Category Auto parts Category Bicycle parts Category Fashion ... more details
Infobox Newspaper name Image The Daily Reflector Logo.png image Image The Daily Reflector front cover.png 250px caption The 2009 07 08 front page of br The Daily Reflector type Daily Newspaper format Broadsheet foundation January 10, 1882 ceased publication price owners Cooke Communications publisher D. Jordan Whichard editor Al Clark chiefeditor assoceditor staff language political circulation 19,300 Daily br 22,000 Sunday headquarters Greenville, North Carolina oclc ISSN website http www.Reflector.com www.Reflector.com The Daily Reflector is a daily newspaper that serves Pitt County, North Carolina Pitt County and eastern North Carolina . It is headquartered in Greenville, North Carolina . History The paper was originally titled The Eastern Reflector , and was founded in 1882 by David Jordan and Julian Whichard. They founded the paper in a part of their mothers school house with equipment they bought from another paper they had worked for, The Greenville Express. It became known and published daily as The Reflector on Dec. 10, 1894. The Daily Reflector joined the Cox Enterprises Cox Newspapers Inc. family in 1996. Her and mixer are free monthly magazines produced by The Daily Reflector. Her as the name implies is a magazine for women. mixer written with a lowercase m 18 to 35 year old population which includes the large student bodies of East Carolina University and Pitt Community College with local music, night spots and events for the same area. In January, 2009, the publication found itself in a financial crunch. Faced with a heavy decline in both readership and advertising ... to sell three of its North Carolina newspapers the Rocky Mount Telegram, The Daily Reflector ... and publisher of The Daily Reflector. http www.rockymounttelegram.com news cooke communications to buy cox nc publications 728132.html External links http www.reflector.com The Daily Reflector website Category Newspapers published in North Carolina DEFAULTSORT Daily Reflector, The NorthCarolina ... more details
Orphan date February 2009 Reflector is a rock band that formed in Beijing in 1997. According to the band s official English language website , Reflector has been featured on CNN and in Newsweek magazine. Reflector lists among its English language musical influences the bands Green Day , NOFX and Lagwagon . In 2000 their song Scream Club was featured in the movie Warm Summer Day . In 2001 Reflector became one of the first of bands which many in China consider to be punk from China to tour the United States the band performed in seven West Coast cities, including a gig in Sacramento opening for former punk band Anti Flag . The band performed at Cui Jian s 2003 Live Vocals festival , and in the Midi Music Festival 2003 Midi Music Festival . Personnel Tian Jianhua aka Tj Bass Vocals Li Peng Guitar Vocals Ye Jingying Drums Background Vocals Discography 1999 Wuliao Contingent compilation, 8 songs 2002 Reflector ep Reflector ep on People s Records External links en ja zh icon http www.reflectorband.com en main.htm Reflector official site ja http www.yaogun.com artist punk reflector.htm Reflector at Yaogun Chinese Rock Database Category Beijing culture Category Chinese musical groups Category Punk rock groups Asia band stub China musician stub rock band stub es Reflector banda ... more details
Reflector is the name of several Decepticon characters from the fictional Transformers toy line Transformers toy range and associated universe. Transformers Generation 1 Transformers character name Reflector ... Chris Latta English Yoku Shioya Japanese Reflector comprises three separate robots which together ... applicances e.g. Soundwave Transformers Soundwave , Reflector was sized to fit the hands of children ... Generation 1 cartoon, Reflector was depicted as a gestalt in robot mode, speaking with the same voice, and moving in unison. Reflector had very few significant action roles in Season 1 1984 85 , mostly ... phased out as more Decepticon toys were introduced. In those few episodes in which Reflector ... pecking order . Reflector is seen briefly in some The Transformers The Movie 1986 scenes, such as during ... resemblance to the Reflector robots are seen running to man the defenses of the planet. However the character ... was never seen after the movie . Three additional Reflector units were shown in the initial episodes, at least one displaying an individual personality distinct from the typical Reflector unit when ... Reflector unit, while the actual Reflector constituted three drones working in unison in episodes ... in robot modes, the three Reflector robots had a near identical appearance in the cartoon their bodies ... only one of them, appropriately, had a lens assembly in his torso . Dreamwave Productions Reflector ... Starscream as a show of force to Soundwave. Reflector also appeared in the iBooks trilogy ... marks a continuity error with the Dreamwave series, as it is established in the second miniseries that Reflector ... , resolved this by noting that the Cybertron bound Reflector was a copy of the real one the Earthen one. It is notable here Says who date July 2010 that Reflector s three components all have separate personalities. Devil s Due Publishing Reflector appeared in the original G.I Joe vs the Transformers ... Reflector would appear again this time in a toy accurate form as part of the Decepticon army under ... more details
Encyclopedia
top
