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 ... in the 19th century. Applications The most common modern applications of the parabolicreflector are in satellite ... car headlights , Parabolic aluminized reflector light PAR cans and LED housings. ref http farside.ph.utexas.edu ... Fitzpatrick 2007 07 14 ref The Olympic Flame has been lit using a parabolicreflector concentrating ... oppos s.JPG thumb Parabolic mirror wok with optical illusion A parabolicreflector pointing upward ... See also Parabola Parabolic antenna Parabolic trough Paraboloid Spherical reflector Toroidal reflector ... links http www.falstad.com ripple ex parabola.html Java demonstration of a parabolicreflector http .... http www.antenna theory.com antennas reflectors dish.php ParabolicReflector Antennas www.antenna ... solar collector or wifi projects using parabolic reflectors. DEFAULTSORT ParabolicReflector Category ... 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 ... more details
Cleanup weighted date April 2012 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 . 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 of saturated colors without the use of color filters, when white light is not needed. Construction PAR lights possess a Lens optics lens and reflector that are integral parts of the lamp ... to a term used in the game of golf . Beam width Depending the parabolicreflector geometry and placement ... used 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 ... is what is rotated. Therefore, the diameter of the light spot is defined by the aluminium reflector ... and music venues. Raylite reflector Raylite reflectors can be added to PAR64 and PAR56 lamp housings to achieve a narrow spot effect. A conventional quartz halogen lamp is used in place of the reflector ... makes a Profile PAR , combining the attributes of the PAR can and an ellipsoidal reflector ... more details
wiktionary Parabolic usually refers to something in a shape of a parabola . Parabolic may refer to In mathematics In elementary mathematics , especially elementary geometry Parabolic coordinates Parabolic cylindrical coordinates Parabolic geometry Fermat s spiral Parabolic spiral In advanced mathematics Parabolic cylinder function Parabolic induction Parabolic Lie algebra Parabolic partial differential equation 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 nn Parabolsk ru ... 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 nl Reflector ja ru sk Reflektor ... 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
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 Category Microphones Category Surveillance Category Covert listening devices electronics stub es Micr fono parab lico fa ... 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 Luftkanone designed ... range of 800 1500 pulses per second. The parabolicreflector was convert 3.2 m ft 1 in diameter ... 2 ref The parabolicreflector of the Holophones system emits plane waves. ref Acustica Musicale e ...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 ... more details
, Germany . It has a Cassegrain antenna Cassegrain type feed. A parabolic antenna is an antenna radio antenna that uses a parabolicreflector , a curved surface with the cross sectional shape of a parabola ... beamwidths, the parabolicreflector must be much larger than the wavelength of the radio waves used, so parabolic antennas are used in the high frequency part of the radio spectrum , at Ultrahigh frequency ... of a metal parabolicreflector with a small Feed horn feed antenna suspended in front of the reflector ... through a transmission line to the Radio receiver receiver . Parabolicreflector Image Parabolic ... is used to direct the energy into the parabolicreflector from a feed antenna located away from .... Parabolic antennas are distinguished by their shapes Paraboloidal or dish The reflector is shaped ..., to control the shape of the beam Shaped reflectors The parabolicreflector can be given ... area. They are often used with secondary reflector antennas such as the Cassegrain. Parabolic antennas ... parabolicreflector antenna in 1888. The antenna was a cylindrical parabolicreflector made of zinc ... Guglielmo Marconi used a parabolicreflector during the 1930s in investigations of UHF transmission ... reflector spherical rather than a parabolic shape, which reduces the Aberration in optical systems ... of the antenna aperture, that is, the mouth of the parabolicreflector math d math is the diameter of the parabolic ... slightly depending on the shape of the reflector and the feed illumination pattern. For a typical parabolic ... which is spherical reflector spherical in one plane and parabolic in another Corner reflector References ...Image Erdfunkstelle Raisting 2.jpg 250px thumb A parabolic satellite communications antenna at Erdfunkstelle ... called a dish antenna or parabolic dish . The main advantage of a parabolic antenna is that it is highly Directivity directive it functions similarly to a searchlight or flashlight reflector to direct .... Parabolic antennas have some of the highest antenna gain gain s, that is they can produce the narrowest ... 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
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
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 zh ... more details
Wiktionary Parabolic geometry may refer to Euclidean geometry , where Euclidean space is viewed as the natural representation space of the Euclidean group 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
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 ... metres to 70 metres. The centrally located sub reflector serves to focus radio frequency signals ... Reflector Cassegrain de Cassegrain Teleskop es Telescopio de Cassegrain fr T lescope de type Cassegrain ... 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
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 Kepler orbit there is a navbox, such list was redundant orbits DEFAULTSORT Parabolic Trajectory ... 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. Efficiency 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 during the year the magnitude of this error varies throughout the day, taking a minimum ... parabolic troughs are generally designed with a lower solar concentration ratio . Parabolic trough ... solar en technologies concentrated solar power parabolic trough index.html Absorber tube temperature ... utilizing parabolic troughs are hybrids fossil fuel s are used during night hours, but the amount ..., mirrors are used which are parabolic and are of a single piece. In addition, V type parabolic troughs ... abs 1978PhDT.......157S V type parabolic troughs ref Mirror coatings In 2009, scientists ... culture A parabolic trough solar plant appears in the movie Gattaca as well as in the CD insert for the album ... parabolic solar collector systems 48660 Picture Perfect Parabolic Solar Collector Systems , Renewable ... of a parabolic trough DEFAULTSORT Parabolic Trough Category Solar thermal energy de Parabolrinne ... 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 ..., Spencer DE year 1988 chapter Parabolic Coordinates , , title Field Theory Handbook, Including ... links http mathworld.wolfram.com ParabolicCoordinates.html MathWorld description of parabolic coordinates ... 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 it Reflector ... more details
Deleted image removed 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 . Constructing a Parabolic SAR The Parabolic SAR is calculated almost independently for each trend in the price. When the price is in an uptrend, the SAR emerges below the price and converges upwards towards it. Similarly, on a downtrend, the SAR emerges 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 SARn 1 SARn EP SARn Where SARn and SARn 1 represent today s and tomorrow s SAR values, respectively. EP the extreme point is a record kept during each trend that represents the highest value reached by the price during the current uptrend or lowest value during a downtrend. During each period, if a new maximum or minimum is observed ... Category Chart overlays id Parabolic SAR ru ... more details
Infobox Newspaper name The Reflector image File Reflectormasthead.gif caption type Student newspaper ref name staff list Cite web title Reflector staff The Reflector Mississippi State University url http www.reflector online.com options reflector staff year 2011 accessdate 2011 05 28 ref format Broadsheet foundation 1884 ref name staff list ceased publication price Free owners chiefeditor Hannah Rogers ref name staff list circulation 12,000 headquarters Henry Meyer Student Media Center, Mississippi State University, Starkville, Miss. oclc ISSN website http www.reflector.msstate.edu reflector.msstate.edu The Reflector is the student newspaper of Mississippi State University , founded in 1884. ref name staff list References Reflist Student Newspapers of the SEC Mississippi newspaper stub DEFAULTSORT Reflector, The Category Student newspapers published in Mississippi Category Mississippi State University ... more details
Image safety reflector.jpg thumb 200px right Star shaped safety reflector with string and safety pin A safety reflector or pedestrian s 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 ... with the CE EN 13356 safety standard. ref name Pedestrian s reflector info sheet cite web url http www.liikenneturva.fi tietolehti 2008 englanti siniset reflector.php title Pedestrian s reflector info ... to wear safety reflectors when walking during dark conditions. ref name Pedestrian s reflector info sheet The reflector is claimed By whom date November 2009 to be a Finland Finnish creation, invented ... human powered vehicles are also common. gallery File Pedestrian reflector on road.jpg Pedestrian using two safety reflectors 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 References Reflist External links http www.liikenneturva.fi www fi animaatiot ... Road Safety Council DEFAULTSORT Safety Reflector Category Auto parts Category Bicycle parts Category ... 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
A block reflector is an orthogonal, symmetric matrix mathematics 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 Linear algebra stub compu prog stub ... more details
multiple image header A homemade reflector oven align right image1 Reflector Oven 02.jpg width1 225 caption1 A reflector oven prior to use image2 Reflector Oven 01.jpg width2 225 caption2 The oven set directly on hot coals File Reflector oven for Game Birds.JPG thumb upright A reflector oven for cooking game birds, at Stokestown Park House A reflector oven sometimes known in older cooking literature as a tin kitchen ref Sloat, Caroline ed. , Old Sturbridge Village Cookbook , 2ed, Old Saybrook, CT Globe Pequot Press, 1995, ISBN 1564407284 ref , is a polished metal container, often made of tin. It is designed to enclose an article of food on all but one side, to cause it to bake by capturing radiant heat from an open fire, and reflecting the heat towards the food. In its simplest form, a reflector oven is simply a box or collar that partially surrounds the food, with an open side that faces the heat source, which is generally either a hearth fire or a portable stove , depending on the situation in which the food is being prepared. In Colonial America this method of baking meat, fowl, quick bread, or pastries, was a very popular method for hearth cooking. A reflector oven that uses the Sun as its primary heat source is known as a solar cooker . A Dutch oven , was another popular method of baking while using an open fire or a fire in a hearth. The Dutch oven, unlike the tin kitchen, is made of iron, and would collect and consentrate the heat of coals placed beneath and on top of the oven, while preventing the coals from direct contact with the food, and isolating smoke from the fire from the baking food. See also Outdoor cooking A Reflector oven is set beside the fire to capture the radiant heat, and bake with it. It is often tin, new ones are made from aluminum. The picture with this article shows it being set directly on the coals. dutch ovens are normally cast iron, with lids, and outdoor fire ones have legs. It is set directly on coals, with additional coals on the top ... more details
Reflector is the name of three Decepticon characters from the fictional Transformers toy line Transformers ... combine into one robot on several occasions. In the Shattered Glass storyline, Reflector is one character instead of three. Transformers Generation 1 Transformers character name Reflector image caption ... Yoku Shioya Japanese Reflector comprises three separate robots which together transform into one ... e.g. Soundwave Transformers Soundwave , Reflector was sized to fit the hands of children. It featured .... REF http www.x entertainment.com messages 547.html REF Marvel Comics Reflector s sole appearance ... 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 serving as part ... out as more Decepticon toys were introduced. In those few episodes in which Reflector did have a role ... . Reflector is seen briefly in some The Transformers The Movie 1986 scenes, such as during the attack ... to the Reflector robots are seen running to man the defenses of the planet. However the character is never ... 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 shuttling energon to Cybertron through the Space Bridge . Subsequent episodes periodically showed an individual Reflector unit, while the actual Reflector constituted three drones working in unison in episodes they had ..., the three Reflector robots had a near identical appearance in the cartoon their bodies were primarily ..., appropriately, had a lens assembly in his torso . Dreamwave Productions Reflector would make ... as a show of force to Soundwave. Reflector also appeared in the iBooks trilogy written by David ... error with the Dreamwave series, as it is established in the second miniseries that Reflector was on Cybertron ... this by noting that the Cybertron bound Reflector was a copy of the real one the Earthen one ... more details
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