such as energy in electron spectroscopy or mass to charge ratio in mass spectrometry . Spectrum is also ...hatnote This article deals with the general meaning of spectrum and the history of its use. For other meanings and specific uses, see Spectrum disambiguation . Image Rainbow above Kaviskis Lake, Lithuania.jpg thumb right 180px The spectrum in a rainbow A spectrum plural spectra or spectrums ref http dictionary.reference.com browse spectrum Dictionary.com . The American Heritage Dictionary of the English ... been applied by analogy to many fields other than optics. Thus, one might talk about the spectrum of political spectrum political opinion , or the spectrum of activity of a drug, or the autism spectrum . In these uses, values within a spectrum may not be associated with precisely quantifiable numbers ... under a single title for ease of discussion. In most modern usages of spectrum there is a unifying ... did evolve from a unifying theme, but this may be difficult to recognize. Origins In Latin spectrum ... at Salem, Massachusetts in the late 17th century. The word spectrum Spektrum was strictly used ... thumb right 350px The spectrum of a uniform light source rendered into the sRGB color space. In the 17th century the word spectrum was introduced into optics , referring to the range of color s observed ... 350 px Mass spectrum of a peptide showing the isotopic distribution The term spectrum was expanded ... also commons category Spectrum Physical science Electromagnetic spectrum Visible spectrum or optical spectrum, a subset of the electromagnetic spectrum Emission spectrum observed in light Absorption spectrum observed in light Energyspectrum of a collection of particles particle physics Frequency spectrum of a signal Mass spectrum chemical analysis of atoms and molecules Power spectrum of a signal ... Economic spectrum Political spectrum of opinion Spectrum disorder , in psychiatry Mathematics Spectrum homotopy theory Spectrum of a matrix , in linear algebra Spectrum of an operator , in functional ... more details
The Spectrum may refer to The Spectrum at Northlands Park The Spectrum Sirius XM , a channel on Sirius XM Radio The Spectrum USLS The Spectrum USLS , the student newspaper of the University of St. La Salle NDSU Spectrum NDSU Spectrum , the student newspaper of North Dakota State University The Spectrum , the student newspaper at Blake School Minneapolis, Minnesota The Blake School Spectrum arena , a closed sports venue in Philadelphia, Pennsylvania The Spectrum Utah The Spectrum , a newspaper in St. George, Utah See also Spectrum disambiguation disambig ... more details
distribution of an illuminant Energyspectrum of a collection of particles particle physics Frequency spectrum of a signal Power spectrum of a signal Harmonic series music spectrum of sound energy ...wiktionary spectrum tocright A spectrum is a condition or value that is not limited to a specific set of values but can vary infinitely within a continuum. Spectrum may also refer to Physical science Electromagnetic spectrum Visible spectrum or optical spectrum, a subset of the electromagnetic spectrum Emission spectrum observed in light Absorption spectrum observed in light Spectral class of stars ... spectrum , disparities between social classes Political spectrum of opinion Spectrum disorder , in psychiatry Mathematics Spectrum of a matrix , in linear algebra Spectrum functional analysis , a generalization of the concept of matrix eigenvalues to operators Spectrum homotopy theory Spectrum of a graph, studied in spectral graph theory Spectrum of a ring , in commutative algebra Spectrum of a C algebra Spectrum of a theory , in mathematical logic Stone space of boolean algebra Media IEEE Spectrum , a magazine Spectrum magazine Spectrum magazine , an independent Seventh day Adventist magazine Spectrum TV channel , a defunct Chicago area pay television broadcaster founded by United Cable Spectrum newspaper Spectrum newspaper , a defunct Toledo, Ohio weekly newspaper Spectrum 1958 TV series Spectrum 1958 TV series , a Canadian television series Spectrum Russian novel Spectrum Russian novel , a novel by Russian author Sergey Lukyanenko Spectrum liftout in The Sydney Morning Herald The Spectrum , the local daily newspaper in St. George, Utah Student newspapers The Spectrum USLS The Spectrum USLS , the student newspaper of the University of St. La Salle in the Philippines NDSU Spectrum , the student newspaper of the North Dakota State University The Spectrum newspaper The Spectrum newspaper ... , album by metal band Skyfire Spectrum band , an Australian group of the 1970s led by Mike Rudd Spectrum ... more details
IDT Spectrum , a subsidiary of IDT Corp. IDT Corporation , holds and leases fixed wireless spectrum. History IDT Spectrum, Inc. and IDT Spectrum, LLC, are subsidiaries of IDT Corporation New York Stock ... company, with interests primarily in the telecommunications and energy industries. In December 2001, IDT Corporation through its subsidiary Winstar Holdings, LLC, acquired FCC spectrum licenses and other ... company, Winstar Spectrum, LLC, to hold its spectrum licenses and then caused the spectrum licenses ... Holdings formed IDT Spectrum, LLC, and caused Winstar Spectrum, LLC to transfer and assign to IDT Spectrum ... business. In January 2005, Winstar Holdings formed IDT Spectrum and contributed to IDT Spectrum all of its interests in IDT Spectrum, LLC, as well as other assets used in its connectivity services. ref ... 76baaeb6 2549 44f5 8e1d cd700701e704&cikid 683957&tabIndex 2&coname IDT SPECTRUM 2C INC.&fnid 46162&ipo 1 IDT SPECTRUM, INC listing at EDGAR Pro ref Current Holdings IDT Spectrum, LLC s primary holdings include 633 spectrum licenses in the 39 GHz range, as well as an additional 16 LMDS licenses ... spectrum in the United States. ref name FCC http wireless2.fcc.gov UlsApp UlsSearch results.jsp?licSearchKey licSearcKey20121151731720&curPage 2&reqPage 1 FCC listing for IDT Spectrum, LLC ref The FCC s 39 GHz auctioned license band spectrum is primarily licensed in Economic Areas, or EAs. EAs .... On average, IDT Spectrum holds more than 500 MHz of spectrum in the top 200 U.S. markets Economic Areas by population and approximately 940 MHz of spectrum in the top 50 U.S. markets. IDT Spectrum s 39 GHz holdings are contiguous across the United States including Alaska, Hawaii and Puerto Rico . ref name edgarpro In October 2010, IDT Spectrum renewed 633 of its 39 GHz licenses, which now expire in October 2020. ref name FCC The majority of IDT Spectrum s 28 GHz LMDS licenses expire in October 2018. Use of Licenses Among other business activities, IDT Spectrum leases ... more details
no footnotes date December 2011 unreferenced date December 2011 The Spectrum functional analysis spectrum of a linear operator is commonly divided into three parts point spectrum, continuous spectrum, and residual spectrum. If math H math is a topological vector space and math A H to H math is a linear map, the spectrum of math A math is the set of complex numbers math lambda math such that math A lambda I H to H math is em not em invertible. We divide the spectrum depending on why this is not invertible. If math A lambda I math is not injective , we say that math lambda math is in the point spectrum of math A math . Elements of the point spectrum are called eigenvalues of math A math and non zero elements of the null space of math A lambda I math are known as eigenvectors of math A math . Thus math lambda math is an eigenvalue of math A math if and only if there is a non zero vector math ... spectrum of math A math . The union of the point spectrum and the continuous spectrum is known ... spectrum of math A math . Quantum mechanical interpretations The position operator usually has a continuous spectrum, much like the momentum operator in an infinite space. But the momentum in a compact ... physical systems, specially bound state s, tend to have a discrete quantized spectrum that is where ... energy loss spectroscopy usually requires the computation of the non quantized or continuous spectrum density of states of the Hamiltonian. This is particularly true when broad resonance quantum ... and the hydrogen atom are examples of physical systems in which the Hamiltonian has a discrete spectrum. In the case of the hydrogen atom, it has both continuous as well as discrete part of the spectrum ... Inverse compton scattering Non continuous line spectra Emission spectrum Absorption spectrum Mathematically rigorous point of view Decomposition of spectrum functional analysis References reflist Category Scattering theory he nl Continu spectrum pt Espectro cont nuo ... more details
to a lower energy state. Each element s emission spectrum is unique. Therefore, spectroscopy ... in energy between the two states. These emitted photons form the element s emission spectrum. The fact that only certain colors appear in an element s atomic emission spectrum means that only certain frequencies of light are emitted. Each of these frequencies are related to energy by the formula math E text photon h math math nu, math where E is the energy of the photon, is its frequency ... of energy. The emission spectrum can be used to determine the composition of a material, since it is different ... . Energyspectrum An energyspectrum is a distribution energy among a large assemblage of particles ... . An example of an energyspectrum in the physical domain is ocean waves breaking on the shore. For any ... the number of waves against the amplitude height for the interval will yield the energyspectrum of the set. ref name energyspectrum Optical Spectroscopy and Astrophysics Application Energy spectra ... transmittance is off scale. ref name energyspectrum http home.znet.com schester facts solar ...The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic ... by which a higher energy quantum mechanical state of a particle becomes converted to a lower ... emitted is a function of the energy of the transition. Since energy must be conserved, the energy difference between the two states equals the energy carried off by the photon. The energy states of the transitions ... energy gamma rays , while nuclear spin transitions emit low energy radio waves . The Beam emittance ... described using semi classical quantum mechanics the particle s energy levels and spacings are determined ... are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals. When the electrons fall back down and leave the excited state, energy is re emitted in the form ... by the atom. The principle of the atomic emission spectrum explains the varied colors in neon ... more details
Open spectrum also known as free spectrum is a movement to get the Federal Communications Commission to provide more unlicensed spectrum unlicensed , radio frequency electromagnetic spectrumspectrum that is available for use by all. Proponents of the commons model of open spectrum advocate a future where all the spectrum is shared, and in which people use Internet protocols to communicate with each other, and smart devices, which would find the most effective energy level, frequency, and mechanism ..., or even broadcast their own website. A notable advocate for Open Spectrum is Lawrence Lessig . National governments currently allocate bands of spectrum sometimes based on guidelines from the International ..., most notably, a limit on total transmission power. Unlicensed spectrum is Decentralisation decentralized there are no license payments or central control for users. However, sharing spectrum between ... users of unlicensed spectrum include cordless telephones, and baby monitors. A collection of new technologies are taking advantage of unlicensed spectrum including Wi Fi , Ultra Wideband , spread spectrum , software defined radio , cognitive radio , and mesh networks . ref citeweb title Open Spectrum A Path to Ubiquitous Connectivity url http www.acmqueue.org modules.php?name Content&pa showpage&pid 37 publisher acmqueue.org accessdate 2008 02 26 ref Phaseout of Open spectrum hoax Although it was reported that Congress has passed a new law which will ban the use of all open spectrum by 2012 ... of the spectrum most useful for observing the Universe are mostly carried out by the international ... Open Spectrum FAQ http openspectrum.org.uk Open Spectrum UK http openspectrum.eu Open Spectrum Alliance public interest, non profit which pushes for open spectrum at EU level and national level in the EU http www.reed.com dpr locus OpenSpectrum David P. Reed s Open Spectrum resource ... resource management it Open Spectrum no Fritt radiospektrum ... more details
The Hilbert spectrum sometimes referred to as the Hilbert amplitude spectrum , named after David Hilbert , is a statistical tool that can help in distinguishing among a mixture of moving signals. The spectrum itself is decomposed into its component sources using independent component analysis . The separation of the combined effects of unidentified sources blind signal separation has applications in climatology , seismology , and Magnetic resonance imaging biomedical imaging . Conceptual summary The Hilbert spectrum is computed by way of a 2 step process consisting of Preprocessing a signal separate it into intrinsic mode functions using a mathematical decomposition such as singular value decomposition SVD Applying the Hilbert transform to the results of the above step to obtain the instantaneous frequency spectrum of each of the components. The Hilbert transform defines the imaginary part of the function mathematics function to make it an analytic function sometimes referred to as a progressive function , i.e. a function whose signal strength is zero for all frequency components less than zero. With the Hilbert transform, the singular vectors give instantaneous frequencies that are functions of time, so that the result is an energy distribution over time and frequency . The result is an ability to capture time frequency localization to make the concept of instantaneous frequency and time relevant the concept of instantaneous frequency is otherwise abstract or difficult to define for all but monocomponent signals . Applications of the Hilbert spectrum The Hilbert spectrum has many practical applications. One example application pioneered by Professor Richard Cobbold Scientist Richard Cobbold , is the use of the Hilbert spectrum for the analysis of blood flow by pulse Doppler ultrasound . Other applications of the Hilbert spectrum include analysis of Climatology climatic ... spectrum for nonlinear and non stationary time series analysis Proc. R. Soc. Lond. A 1998 ... more details
Spectrum 7 was an oil company started by William DeWitt, Jr. William DeWitt and Mercer Reynolds . In 1984, Spectrum 7 merged with George W. Bush s Arbusto Energy . After the merger, Bush became the Chairman and CEO of Spectrum 7. In 1986, after reporting a net loss of 1.5 million the previous year, Spectrum 7 was purchased by Harken Energy Harken Oil and Gas for 2.2 million Fact date June 2007 , at the time one third owned Fact date June 2007 by noted investor George Soros . Years later Soros, who then, as now, was one of the world s most powerful financial market players, offered a reason why Harken bought the failing Spectrum 7. According to The Nation s Washington editor David Corn, who happened to run into Mr. Soros at a party recently and asked him why Harken had bought Mr Bush s company. I didn t know him, Corn quoted Mr Soros as saying in an article posted on The Nation s website. He was supposed to bring in the Gulf connection. But it didn t come to anything. We were buying political influence. That was it. He was not much of a businessman. A Soros spokesman, Michael Vachon, would neither deny nor confirm that Mr Soros had made the comment. But he said it was taken out of context because it implied that Mr Soros was actively involved in Harken s decision to buy Spectrum7. This was not the case. Mr Soros left the management of Harken to others, Mr Vachon said. But numerous Harken officials have said over the years that Mr Bush s presence at Spectrum7 made the failing company more attractive than it would otherwise have been. ref http www.smh.com.au articles 2002 07 19 1026898920079.html Soros adds to doubts on Bush business deals ref References reflist Category Defunct oil companies of the United States US energy company stub sv Spectrum 7 ... more details
Modulation techniques Multiplex techniques In telecommunications and radio communication , spread spectrum ... and Churchill, which incorporated spread spectrum, but due to its top secret nature, SIGSALY s existence ... CDMA , a civilian form of spread spectrum, though the Lamarr patent had no direct impact on subsequent ... Systems that led to early spread spectrum technology in the 1950s. Parallel research on radar systems and a technologically similar concept called phase coding also had an impact on spread spectrum development. Commercial use The 1976 publication of Spread Spectrum Systems by Robert Dixon, ISBN 0 471 ... into commercial applications. Initial commercial use of spread spectrum began in the 1980s in the US ... and Equatorial systems, spread spectrum enabled small antennas that viewed more than one satellite to be used since the Process gain processing gain of spread spectrum eliminated interference. The Del Norte system used the high bandwidth of spread spectrum to improve location accuracy. In 1981, the Federal ... spectrum in a Notice of Inquiry docket. ref http www.marcus spectrum.com documents SpreadSpectrumNOI.pdf ... by Michael Marcus of the FCC staff. The proposals in the docket were generally opposed by spectrum ... decision ref http www.marcus spectrum.com documents 81413RO.txt Authorization of Spread Spectrum ... use of spread spectrum in 3 bands at powers up to 1 Watt. FCC said at the time that it would welcome additional requests for spread spectrum in other bands.The resulting rules, now codified as 47 CFR ... within 2 months after the decision to commercialize CDMA. Spread spectrum telecommunications ... bandwidth considerably larger than the frequency content of the original information. Spread spectrum ... decreases the potential interference to other receivers while achieving privacy. Spread spectrum ... hopping spread spectrum FHSS , direct sequence spread spectrum DSSS , time hopping spread spectrum THSS , chirp spread spectrum CSS , and combinations of these techniques are forms of spread spectrum ... more details
Refimprove date December 2008 The Bloch spectrum is a concept in quantum mechanics in the field of theoretical physics this concept addresses certain energy spectra considerations. Let H be the one dimensional Schr dinger equation operator math H frac d 2 dx 2 U alpha, math where U sub sub is a periodic function of period . The Bloch spectrum ref An upper bound on the allowed bands of the Bloch spectrum of one dimensional Schr dinger operators with periodic potentials , N. N. Meiman, Journal of Mathematical Physics , March, 1983, volume 24, issue 3, pp. 539 540 ref of H is defined as the set of values E for which all the solutions of H E 0 are bounded on the whole real axis . The Bloch spectrum consists of the half line E sub 0 sub E from which certain closed intervals E sub 2 j 1 sub , E sub 2 j sub j 1, 2, ... are omitted. These are forbidden bands or gaps so the E sub 2 j 2 sub , E sub 2 j 1 sub are allowed bands. References references Category Quantum mechanics Physics stub ar ... more details
Doctor Spectrum Kenji Obatu battles Iron Man on the cover of Iron Man 63 Oct. 1973 . br Art by Gil Kane . character name Doctor Spectrum real name publisher Marvel Comics debut Villain br Avengers ... Power Squadron Supreme Earth 31916 aliases powers Via Power Prism br Flight br Energy projection and manipulation br Ability to survive in space br Intangibility first Doctor Spectrum MarvelUSide Kenji ... Earth 31916 Doctor Spectrum is the name of several fictional character fictional characters that appear ... Power Squadron Supreme of Earth 31916 respectively . Publication history Doctor Spectrum the supervillains ... members were loosely based on heroes in DC Comics Justice League of America , with Doctor Spectrum based ... the Avengers comics Avengers . Doctor Spectrum battles the Avenger Iron Man , and is defeated when .... ref Avengers 69 71 Oct. Dec. 1969 ref Doctor Spectrum reappears in the title Iron Man ... s abilities becomes the second Doctor Spectrum. ref Seen in flashback in Avengers Annual 8 1978 ref ... alien Nebulon comics Nebulon although the team are unaware of the fact that this a new Doctor Spectrum ... and Nebulon , with Doctor Strange defeating Doctor Spectrum. ref Defenders 13 14 May July 1974 ref After this defeat Doctor Spectrum and his two remaining team mates are teleported off world by Nebulon, returning with an energy draining weapon. The Squadron Sinister plan to threaten the Earth ... Prism seizes control of the character and transforms her into a mind controlled female Doctor Spectrum ... weakness Spectrum s own arrogance meant that s he assumed that Iron Man had kept that information ... by the Avengers. Roberts becomes Doctor Spectrum once more, although on this occasion the Power ... now called Speed Demon comics Speed Demon Nighthawk Marvel Comics Nighthawk and a new Doctor Spectrum ... leader Baron Zemo defeats the Grandmaster, and in the ensuing chaos Doctor Spectrum and the members ... 102 108 July 2006 Jan. 2007 ref Doctor Spectrum the superheroes Joseph Ledger Earth 712 This section ... more details
pp semi small yes File EM Spectrum Properties edit.svg thumb 330px A diagram of the electromagnetic spectrum ... spectrum is the Spectrum range of all possible frequencies of electromagnetic radiation . ref cite web url http imagine.gsfc.nasa.gov docs dict ei.html em spectrum title Imagine the Universe Dictionary ref The electromagnetic spectrum of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. The electromagnetic spectrum extends ... of an atom . It is for this reason that the electromagnetic spectrum is highly studied for spectroscopic purposes to characterize matter. ref name em spectrum cite web last Mehta first Akul url http pharmaxchange.info press 2011 08 introduction to the electromagnetic spectrum and spectroscopy title Introduction to the Electromagnetic Spectrum and Spectroscopy publisher Pharmaxchange.info ... 2011 10 16 ref although in principle the spectrum is infinity infinite and Continuum theory continuous ... Glenn Elert url http hypertextbook.com physics electricity em spectrum title The Electromagnetic Spectrum ... spectrum. The ancient Greeks recognized that light traveled in straight lines ... that you could not see. The next year, Johann Ritter worked at the other end of spectrum and noticed ... portion of the electromagnetic spectrum was filled in with the discovery of gamma ray s. In 1900 ... electromagnetic waves. Range of the spectrum Electromagnetic waves are typically described by any of the following three physical properties the frequency f , wavelength lambda , or photon energy ... frequency, ref name em spectrum so gamma rays have very short wavelengths that are fractions of the size of atom s, whereas wavelengths can be as long as the universe. Photon energy is directly proportional to the wave frequency, so gamma rays have the highest energy around a billion electron volt s and radio waves have very low energy around a femto electron volts . These relations are illustrated ... more details
spectrum. The visible spectrum is the Balmer series portion of the electromagnetic spectrum ... 555 nanometre nm 540 THz , in the green region of the optical spectrum see luminosity function . The spectrum does not, however, contain all the color s that the human eyes and brain can ... wavelengths pass through the optical window , the region of the electromagnetic spectrum which allows ... visible response spectrum. The near infrared NIR window lies just out of the human vision, as well ... spectrum, which is defined in terms of human vision. Bee s and many other insects can detect ... completes a full octave , from D to D. Newton s circle places red, at one end of the spectrum, next ... century the explanations of the optical spectrum came from Isaac Newton , when he wrote his book ... the visible spectrum in a glass of water, four centuries before Newton discovered that prisms could ... Thought first Peter last Coffey year 1912 publisher Longmans ref Newton first used the word spectrum ... spectrum Spektrum was strictly used to designate a ghostly optical afterimage by Johann Wolfgang ... through the prism, creating a spectrum of colors. Newton divided the spectrum into seven named ... argued that the continuous spectrum was a compound phenomenon. Where Newton narrowed the beam of light to isolate the phenomenon, Goethe observed that a wider aperture produces not a spectrum, but rather reddish yellow and blue cyan edges with white between them. The spectrum appears only when these edges are close enough to overlap. In the early 19th century, the concept of the visible spectrum ... spectrum 22thomas young 22 herschel ritter ref Young was the first to measure the wavelengths of different ... The connection between the visible spectrum and color vision was explored by Thomas Young and Hermann ... 1em colspan 3 style background FFF File Linear visible spectrum.svg center 200px sRGB rendering of the spectrum ... in the diagram on the right are an approximation the spectrum is continuous, with no clear boundaries ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 A model spectrum is an artificial spectrum of a star made by recreating the absorption electromagnetic radiation absorption or emission electromagnetic radiation emission features seen in the spectrum. A model spectrum will usually be of a specific spectral type of star and may include other properties of the star, such as a surrounding nebula , presence or lack of an extended atmosphere or a circumstellar dust accretion disk disc . DEFAULTSORT Model Spectrum Category Stellar astronomy Astronomy stub ... more details
Taxobox name Apopestes spectrum image Apopestes spectrum.jpg image width image caption regnum Animal ia phylum Arthropod a classis Insect a ordo Lepidoptera familia Noctuidae tribus genus Apopestes species A. spectrum binomial Apopestes spectrum binomial authority Eugenius Johann Christoph Esper Esper , 1787 synonyms Noctua spectrum Phalaena genistae Phalaena socrus Apopestes spectrum is a moth of the Noctuidae family. It is found from Maghreb , to western Turkey , Lebanon , Israel and Jordan . There is one generation per year. Adults are on wing from April to May. The larvae feed on Papilionaceae species, including Genista , Sarothamnus , Spaltium , Glycyrrhiza and Retama raetam . External links http kmk.entomology.ru pdf rej13 2004 ent13 3 20175 186 20Kravchenko.pdf Species info Category Toxocampina Catocalini stub de Apopestes spectrum nl Apopestes spectrum ... more details
Italic title Taxobox name Funa spectrum image image caption regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Caenogastropoda br clade Hypsogastropoda br clade Neogastropoda superfamilia Conoidea familia Turridae subfamilia Crassispirinae genus Funa sea snails Funa species F. spectrum binomial Funa spectrum binomial authority Reeve, 1845 synonyms ref ref name WoRMS synonyms Pleurotoma spectrum small Reeve, 1845 small Funa spectrum is a species of sea snail , a marine gastropod mollusk in the family biology family Turridae , the turrids. ref name WoRMS WRMS species 433826 Funa spectrum Reeve, 1845 4 April 2010 ref Description Empty section date April 2010 Distribution Empty section date April 2010 References reflist External links Use dmy dates date January 2011 DEFAULTSORT Funa Spectrum Category Turridae Category Animals described in 1845 turridae stub pt Funa spectrum vi Funa spectrum ... more details
Spectrum pooling is a spectrum management strategy in which multiple radio spectrum users can coexist within a single allocation of radio spectrum space. ref cite doi 10.1109 MCOM.2004.1273768 ref One use of this technique is for primary users of a spectrum allocation to be able to rent out use of unused parts of their allocation to secondary users. ref cite web title Dynamic Spectrum Access and Overlay Systems url http www.its.bldrdoc.gov isart art10 slides and videos10 Jondral Berthold Burgkhardt Weiss V2.pdf author Friedrich K. Jondral, Ulrich Berthold, Dennis Burgkhardt, Timo A. Wei ref Spectrum pooling schemes generally require cognitive radio techniques to implement them. ref cite web url http ursi france.institut telecom.fr pages pages evenements journees scient docs journees 2006 Jondral JS06.pdf title Cognitive Radio A Necessity for Spectrum Pooling author Friedrich K. Jondral date March 28, 2006 publisher Universit t Karlsruhe Communications Engineering Lab ref References reflist Category Radio spectrum radio comm stub ... more details
citations missing date November 2011 Infobox University name Guildford Spectrum website http www.guildfordspectrum.co.uk Location map Surrey lat 51.24844 long 0.56288 width 180 float right caption Guildford Spectrum shown within Surrey br gbmapping TQ004509 Guildford Spectrum is a leisure complex in Guildford , Surrey , England . Owned by Guildford Borough Council , it was opened on 28 February 1993 at a cost of 28 million. It is the home of ice hockey team the Guildford Flames , and other sports clubs. In addition to its large indoor sports arena it has an Olympic size ice rink, four swimming pools , a tenpin bowling centre , squash courts and football athletics stadium. The stadium adjoining the complex is home to Guildford City F.C. who play in the Combined Counties Football League . The stadium has 135 seats under cover as well as having a standing capacity of around one thousand. In 2011 operation of the Spectrum was outsourced to Freedom Leisure as part of a ten year deal with Guildford Borough Council. ref Get Surrey article on Freedom Leisure http www.getsurrey.co.uk news s 2102799 guildford spectrum under new management ref Facilities Overview 32 lane tenpin bowling centre Olympic ice rink with a capacity of over 2000. Four swimming pools including a leisure pool and 3 board diving pool An outdoor athletics track seating four hundred spectators Energy Level Gym & Spa Squash sport Squash courts 3 Multi purpose sports halls Pool cue sports American pool tables A variety of restaurants including Costa and Wimpy A children s play area called Specky s Pirate Ship Swimming There are four pools in the facility Teaching pool 8 lane 25m Competition pool with spectator seating ... as trampolining Spectrum arena can also be transformed into an entertainment venue with seating ... Spectrum official website http www.guildfordcityfc.co.uk Guildford City FC official website http ... venue stub fi Guildford Spectrum ... more details
States radio spectrum frequency allocations chart as of 2003 Spectrum management is the process of regulating ... benefit. ref name CDW07 Martin Cave, Chris Doyle, William Webb, Modern Spectrum Management , Cambridge University Press, 2007 ISBN 0 521 87669 8 ref The term radio spectrum typically refers to the full ... of spectrum management. Demand for wireless broadband has soared due to technological innovation ... the 1930s, spectrum was assigned through administrative licensing. Limited by technology, signal interference was once considered as a major problem of spectrum use. Therefore, exclusive licensing ... of similar services is giving way, in many countries, to a spectrum auction model that is intended to speed technological innovation and improve the efficiency of spectrum use. During the experimental process of spectrum assignment, other approaches have also been carried out, namely, lotteries , unlicensed access and privatization of spectrum. Governments and spectrum management Most countries consider RF spectrum as an exclusive property of the state. The RF spectrum is a national resource ... of spectrum management is to mitigate radio spectrum pollution and maximize the benefit of usable radio spectrum. The first sentence of the International Telecommunication Union ITU constitution ... spectrum management requires regulation at national, regional and global levels. Goals of spectrum management include rationalize and optimize the use of the RF spectrum avoid and solve interference ... coordinate wireless communications with neighbours and other administrations. Radio spectrum items ... toward regional commissions such as CEPT in Europe, CITEL in America and toward ITU . RF spectrum ... versus market based spectrum management are found at the 2008 PhD thesis http eprints.mdx.ac.uk 133 2 MazarAug08.pdf . Spectrum use Spectrum management is a growing problem due to the growing number of spectrum uses. Over the air Broadcast television broadcasting , which started in 1920. Government ... more details
Italic title Taxobox name Conus spectrum image Conus spectrum 001.jpg image caption regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Caenogastropoda br clade Hypsogastropoda br clade Neogastropoda superfamilia Conoidea familia Conidae subfamilia Coninae genus Conus species C. spectrum binomial Conus spectrum binomial authority Linnaeus, 1758 synonyms ref ref name WoRMS WRMS species 215432 Conus spectrum Linnaeus, 1758 27 March 2010 ref synonyms Conus inflatus small G. B. Sowerby II, 1833 small br Conus pica small A. Adams & Reeve, 1848 small br Cucullus carota small R ding, 1798 small Conus spectrum is a species of sea snail , a marine gastropod mollusk in the family biology family Conidae , the Conus cone snails and their allies. ref name WoRMS Like all species within the genus Conus , these snails are predatory and venomous . They are capable of stinging humans, therefore live ones should be handled carefully or not at all. Description Empty section date March 2010 Distribution Empty section date March 2010 gallery File Conus spectrum 1.jpg Conus spectrum Linnaeus, C., 1758 File Conus spectrum 2.jpg Conus spectrum Linnaeus, C., 1758 gallery References reflist External links http biology.burke.washington.edu conus catalogue index.php The Conus Biodiversity website http www.coneshells am.ru Cone Shells Knights of the Sea Use dmy dates date January 2011 DEFAULTSORT Conus Spectrum Category Conus spectrum Category Animals described in 1758 conus stub fr Conus spectrum nl Conus spectrum pt Conus spectrum vi Conus spectrum ... more details
Het Spectrum is a Dutch publishing house. It publishes books, under its own name and two other trade marks Winkler Prins and Prisma. Since September 1999, Het Spectrum is a business unit within PCM Uitgevers PCM Algemene Boeken . Het Spectrum was established in 1935 by book sellers P.H. Bogaard and A.H. Bloemsma. From its humble beginnings in a room above a bakery in de Biltstraat in Utrecht city Utrecht the publishing developed to become one of the largest in the Netherlands. At Het Spectrum work about 50 employees. Het Spectrum started as a Progressivism progressive Catholicism Catholic e publisher that aspired to supply good reading materials to the masses. Hence it published many pocket books. After World War II , this formula continued as Prisma Pockets. Among the pocket books were translated classics for the modest price of 1,25 guilder . The Prisma dictionaries were also part of this line. Dutch authors published through Het Spectrum include Godfried Bomans , Han van Bree, Hubrecht Duijker, L. T. F. Gamut a pseudonym of five authors together , Ben Tiggelaar, and Janwillem van de Wetering . International authors include Dorothy Parker , Dr. Phil , Peter Singer , Edgar Wallace , and P. G. Wodehouse . External links http www.spectrum.nl Het Spectrum Category Publishing companies of the Netherlands Het Spectrum de Het Spectrum nl Uitgeverij Het Spectrum ... more details
Italic title Taxobox name Fusinus spectrum image image caption regnum Animal ia phylum Mollusca classis Gastropoda unranked superfamilia clade Caenogastropoda br clade Hypsogastropoda br clade Neogastropoda superfamilia Buccinoidea familia Fasciolariidae subfamilia Fusininae genus Fusinus species F. spectrum binomial Fusinus spectrum binomial authority A. Adams & Reeve, 1848 synonyms ref ref name WoRMS synonyms Fusus spectrum small A. Adams & Reeve, 1848 small br Fusus spectrum small Adams & Reeve, 1848 small Fusinus spectrum is a species of sea snail , a marine gastropod mollusk in the family biology family Fasciolariidae , the spindle snails, the tulip snails and their allies. ref name WoRMS WRMS species 448377 Fusinus spectrum A. Adams & Reeve, 1848 18 April 2010 ref Description Empty section date April 2010 Distribution Empty section date April 2010 References reflist External links Use dmy dates date January 2011 DEFAULTSORT Fusinus Spectrum Category Fusinus spectrum Fasciolariidae stub vi Fusinus spectrum ... more details
Unreferenced date December 2009 For a mathematically rigorous point of view of discrete spectrum , see decomposition of spectrum functional analysis . In physics, an elementary and accurate explanation of a discrete spectrum is that it is an emission spectrum or absorption spectrum for which there is only an integer number or countable number of intensities. Atomic electronic absorption and emission spectrum are discrete, as contrasted with, for example, the emission spectrum of the sun, which is continuous. Discrete emission spectra of atoms are also referred to as emission line spectra, which show vertical lines at the frequencies or wavelengths of emission. To describe the difference between continuous and discrete spectra, we might refer to probability theory measuring weight versus throwing dice. Conceivably, our body weights can be represented by any number, 50.00000 kilograms, 59.99999 ... of all possible single die tosses is discrete. One segment of the emission spectrum of atomic hydrogen is shown below. Note that we see only four lines. File Emission spectrum H.svg 757px thumb none Emission spectrum of Hydrogen By contrast, the solar spectrum, the spectrum of electromagnetic frequencies ... irradiance spectrum above atmosphere and at surface When we can visualize discrete spectra and continuous ..., for example, as used below. In physics , discrete spectrum is a finite set or a countable ... to have a discrete spectrum if its spectrum consists of isolated point s. If the spectrum of an operator is not discrete, we say that it is a continuous spectrum . The position operator position and the momentum ... systems the corresponding eigenstates are called bound state have a discrete quantized spectrum. This is a major ... of physical systems in which the Hamiltonian has a discrete spectrum. In the case of the Hydrogen atom, it has both continuous as well as discrete part of the spectrum the continuous part represents the ion ized atom. DEFAULTSORT Discrete Spectrum Category Spectral theory ... more details
Infobox Website name World of Spectrum favicon logo screenshot caption url http www.worldofspectrum.org commercial No type Retrocomputing registration Forum posting only owner Martijn van der Heide author launch date 1995 current status Active revenue World of Spectrum is a website devoted to cataloging and archiving material for the ZX Spectrum home computer popular in the 1980s, and has been officially endorsed by Amstrad which holds the rights to the ZX Spectrum brand. ref cite web url http www.worldofspectrum.org permits endorsement.html title Endorsement accessdate 4 August 2008 last van der Heide first Martijn work World of Spectrum ref It was started by Martijn van der Heide in 1995 as a website dedicated to hosting Spectrum games, but grew into hosting anything and everything that was remotely connected to the ZX Spectrum. The site contains an extensive database of information about ... 2002 ref ref The Daily Mirror , 23 October 2001 ref In December 2005 Retro Gamer wrote World of Spectrum ... popular archive of Spectrum related material. ref cite web url http www.worldofspectrum.org WoSFAQ.html 1A title THE WOS FAQ accessdate 25 February 2012 last van der Heide first Martijn work World of Spectrum ... accessdate 6 September 2008 last van der Heide first Martijn work World of Spectrum ref The collection of Spectrum related magazines includes CRASH magazine CRASH , Sinclair User , and Your Sinclair ... Permissions Individual Programmers Artists publisher World of Spectrum date accessdate 8 February ... 2003 03 07 games anti piracy bot fingers title Games anti piracy bot fingers ZX Spectrum archive site ... References reflist External links http www.worldofspectrum.org World of Spectrum use dmy dates date ... Category Online game databases Category ZX Spectrum videogame culture stub Videogame website stub cs World of Spectrum es World of Spectrum fr World of Spectrum pl World of Spectrum ru World of Spectrum sv World of Spectrum ... more details
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