of the spectrum and include class wikitable sortable Block Frequency MHz A 698 704 & 728 734 ...A spectrum auction is a process whereby a government uses an auction system to sell the rights licences to transmit signals over specific bands of the electromagnetic spectrum and to assign scarce spectrum resources. Depending on the specific auction format used, a spectrum auction can last from a single ... revenue in the process. ref cite journal title Spectrum Auctions url http www.cramton.umd.edu papers2000 2004 01hte spectrum auctions.pdf last Cramton first Peter journal Handbook of Telecommunications Economics date 2001 02 pages 605 649 chapter 14 ref Spectrum auctions are a step toward market based spectrum management, and are a way for governments to allocate scarce resources. Alternatives ... has turned into a highly competitive industry where companies are competing to buy valuable spectrum .... ref cite book title Spectrum Auctions and Competition in Telecommunications year 2003 publisher ... 4G technology. With more providers in the mobile industry, the competition during spectrum auctions ... 5 May 2011 ref the valuable 700 MHz spectrum became available because it was no longer being used by analog ... name nytimes cite news last Stone first Brad title Google to Join Spectrum Auction url http www.nytimes.com ... to bid for the C block of the spectrum auction which correspond to channels 54,55,and 59 of the lower 700 MHz spectrum and channels 60,61,65,and 66 of the upper spectrum 700 MHz which ..., AT&T and Verizon also announced plans to enter the spectrum auction in order to purchase C block spectrum ref name nytimes . Countries Sweden On 2008 05 08 Sweden s Post & Telestyrelsen, PTS concluded ... Commission FCC conducts auctions of licenses for electromagnetic spectrum. The FCC has been conducting ... July 1994, the FCC has conducted 87 spectrum auctions, which raised over 60 billion for the U.S. Treasury ... of these two options is the only one to be used in the spectrum auctions. ref name Milgrom Goals ... more details
italictitle Infobox Journal cover discipline African studies language German, English, and French website http www.africa spectrum.org link1 link1 name publisher GIGA German Institute of Global and Area Studies, Institute of African Affairs country Germany history 1966 present frequency 3 year ISSN 0002 0397 eISSN 1868 6869 Jstor OCLC LCCN Africa Spectrum is an interdisciplinary Peer review peer reviewed academic journal concentrating on the analysis of current issues of development in Africa south of the Sahara . It is the only German academic journal exclusively devoted to Africa. Africa Spectrum is published three times a year by the GIGA Institute of African Affairs. The journal is part of the GIGA Journal Family of the German Institute of Global and Area Studies GIGA German Institute of Global and Area Studies Hamburg Hamburg, Germany . Concept Africa Spectrum focuses on social science dealing with Africa and is dedicated to promote a deeper understanding of African peoples and cultures. It aims not just at academics and students, but also at general readers and practitioners with a concern for contemporary Africa. Since 2003 the journal collaborates closely with the Association of Africanists in Germany Vereinigung f r Afrikawissenschaften in Deutschland, VAD . The journal is indexed by the Social Sciences Citation Index , Congressional Information Service , African Studies Abstracts Online , CSA database company Cambridge Scientific Abstracts , Scopus , and the International Bibliography of the Social Sciences . External links http hup.sub.uni hamburg.de giga afsp Africa Spectrum http hup.sub.uni hamburg.de giga journal family indexGIGA GIGA Journal Family http www.giga hamburg.de english index.php?file giga.html&folder giga GIGA German Institute of Global and Area Studies http www.giga hamburg.de english index.php?file iaa.html&folder iaa GIGA Institute of African Affairs Category African studies journals de Africa Spectrum fr Africa Spectrum ... more details
?id iROxMM2MHrIC&pg PA175&dq 22cellular spectrum 22 22television spectrum 22&num 20 v onepage&q 22cellular 20spectrum 22 20 22television 20spectrum 22&f false ref By frequency A band is a small section of the electromagnetic spectrumspectrum of radio communication frequency frequencies , in which channel ... window frequency ranges. To prevent interference and allow for efficient use of the radio spectrum ... of the radio spectrum, and not its frequency allocation . class wikitable Band name Abbreviation Abbr ITU Radio Bands ITU band Frequency br and br wavelength in air Example uses style text align center ... . Article 2, provision No. 2.1 states that the radio spectrum shall be subdivided into nine frequency ...MWband Radio spectrum refers to the part of the electromagnetic spectrum corresponding to radio frequencies ... about 1 mm . Different parts of the radio spectrum are used for different radio transmission technologies and applications. Radio spectrum is typically government regulated in developed countries ... are often referred to by their provisioned use for example, cellular spectrum or television spectrum ... km style text align center Natural and man made electromagnetic noise Extremely low frequency style ... Super low frequency style text align center SLF style text align center 2 style text align center white ... with submarines Ultra low frequency style text align center ULF style text align center 3 ... mines Very low frequency style text align center VLF style text align center 4 style text align ... monitor s, geophysics Low frequency style text align center LF style text align center 5 style text ... Medium frequency style text align center MF style text align center 6 style text align center white ... wave broadcasts, amateur radio, Avalanche Beacons avalanche beacons High frequency style text align ... Very high frequency style text align center VHF style text align center 8 style text align center ... Mobile and Maritime Mobile communications, amateur radio, weather radio Ultra high frequency style ... more details
frequency, ref name em spectrum so gamma rays have very short wavelengths that are fractions of the size ... of the GZK limit . Radio frequency Main Radio frequency Radio spectrum Radio waves ... nm. If radiation having a frequency in the visible region of the EM spectrum reflects off ... radcomm frequency planning spectrum plan arsp wc.pdf Australian Radiofrequency Spectrum Allocations ...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 ... high frequency end, thereby covering wavelengths from thousands of kilometre s down to a fraction of the size 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 ... url http www.vlf.it frequency bands.html title Definition of frequency bands on publisher Vlf.it accessdate 2010 10 16 ref border 0 Gamma ray s MIR Mid infrared HF High frequency High freq. HX Hard X ray s FIR Far infrared MF Medium frequency Medium freq. SX Soft X rays Radio waves LF Low frequency Low freq. EUV Extreme ultraviolet EHF Extremely high frequency Extremely high freq. VLF Very low ... more details
Merge to Bipolar disorder date August 2010 The bipolar spectrum BS refers to a category of mood disorders that feature abnormally elevated or depressed mood. These disorders range from bipolar I disorder , featuring full blown manic episodes, to cyclothymia , featuring less prominent hypomanic episodes, to subsyndromal conditions where only some of the criteria for mania or hypomania are met. These disorders typically also involve depressive symptoms or episodes that alternate with the elevated mood states, or with mixed episodes that feature symptoms of both. ref cite book last first authorlink coauthors title Diagnostic and Statistical Manual of Mental Disorders, 4th Edition Text Revision publisher American Psychiatric Association date location pages 2000 url doi id isbn ref The concept of the bipolar spectrum disorder spectrum is similar to that of Emil Kraepelin s original concept of manic depressive illness. ref http www.medscape.com viewarticle 441617 Across the Bipolar Spectrum From Practice to Research ref Currently, manic depressive illness is usually referred to as bipolar disorder or bipolar. Referential nomenclature A simple nomenclature system was introduced in 1978 by Angst, J., et al., to classify more easily individuals affectedness within the spectrum, following a clinical study by the Psychiatric University Clinic of Z rich . ref cite journal last1 Angst first1 J last2 Felder first2 W last3 Frey first3 R last4 Stassen first4 HH title The course of affective disorders. I. Change of diagnosis of monopolar, unipolar, and bipolar illness. journal Archiv fur Psychiatrie und Nervenkrankheiten volume 226 issue 1 pages 57 64 year 1978 pmid 708227 ref Points on the spectrum using this nomenclature are denoted using the following codes M severe mania D severe depression ... ref There is speculation as to whether this condition may occur with greater frequency in the general .... References Reflist Bipolar disorder DEFAULTSORT Bipolar spectrum Category Bipolar spectrum es ... more details
A spectrum as it applies to mental disorder is a range of linked conditions, sometimes also extending to include singular symptoms and trait theory traits . The different elements of a spectrum either ..., a spectrum approach is taken because there appears to be not a unitary disorder but rather a syndrome composed of subgroups . The spectrum may represent a range of severity, comprising relatively ... name Maser Cite journal author Maser JD, Akiskal HS title Spectrum concepts in major mental disorders ... pmid 12462854 doi 10.1016 S0193 953X 02 00034 5 ref In some cases, a spectrum approach joins ... spectrum , where conditions on this spectrum may now all be referred to as autism spectrum ... as comprising a range of types, a notable example being the bipolar spectrum . A spectrum approach ... File Spectrum sRGB.svg thumb right The visible color spectrum The term spectrum was originally ... white light is dispersed by a prism according to wavelength . Newton first used the word spectrum ... the publication of DSM III 1980 , the spectrum concept in psychiatry may be relatively new, but that it has ... psychopathy manic depressive disorder , as well as by Eugen Bleuler in 1922. The term spectrum was first used in psychiatry in 1968 in regard to a postulated schizophrenia spectrum, at that time meaning ... journal author Angst J title The bipolar spectrum journal The British Journal of Psychiatry volume .... ref name Maser Related concepts A spectrum approach generally overlays or extends a categorical ... ref A spectrum approach sometimes starts with the nuclear, classic DSM diagnostic criteria for a disorder ... and colors In addition, the term spectrum may be used interchangeably with continuum theory continuum ... 0028 7 ref A spectrum approach, by comparison, suggests that although there is a common underlying ... i.e. syndrome or subtype , reminiscent of the visible spectrum of distinct colors after refraction ... the DSM system there is a large literature leading to the conclusion that a spectrum classification ... more details
spectrum. The visible spectrum is the Balmer series portion of the electromagnetic spectrum ... books.google.com ?id RtSpGV Pl 0C&pg PA94 ref In terms of frequency, this corresponds to a band in the vicinity ... 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 ... more details
Merge from Voiceband discuss Talk Voice frequency date November 2010 A voice frequency VF or voice band is one of the frequencies, within part of the Sound audio range, that is used for the transmission telecommunications transmission of Speech communication speech . In telephony , the usable human voice voice frequency band radio band ranges from approximately 300 Hertz Hz to 3400 Hz. It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency , being the electromagnetic energy that represents acoustic energy at baseband . The Bandwidth signal processing bandwidth allocated for a single voice frequency transmission channel communications channel is usually 4 kHz, including guard band s, allowing a sampling rate of 8 kHz to be used as the basis of the pulse code modulation system used for the digital PSTN . Fundamental frequency The Human voice voiced speech of a typical adult male will have a fundamental frequency from 85 to 180 Hz, and that of a typical adult female from 165 to 255 Hz. ref Titze, I.R. 1994 . Principles of Voice Production, Prentice Hall currently published by NCVS.org pp. 188 , ISBN 978 0 13 717893 3. ref ref Baken, R. J. 1987 . Clinical Measurement of Speech and Voice. London Taylor and Francis Ltd. pp. 177 . ref Thus, the fundamental frequency of most speech falls below the bottom of the voice frequency band as defined above. However, enough of the harmonic series music harmonic series will be present for the missing fundamental to create the impression of hearing the fundamental tone. See also Formant Human Voice Vocal range References reflist FS1037C MS188 DEFAULTSORT Voice Frequency Category Human voice Category Telephony da VF pl VF fale ru ... more details
Radio Frequency Category Radio spectrum Category Radio technology Radio waves Category Waves Radio ...Radio frequency RF is a rate of oscillation in the range of about 3 kHz to 300 Gigahertz GHz , which corresponds to the frequency of radio waves , and the alternating current s which carry radio ... a conductive path through it. This property is exploited by high frequency units used in electric ... signals at a time, a radio tuner is necessary to tune in to a particular frequency or frequency range ... a LC circuit tuned circuit . The resonator amplifies oscillations within a particular frequency band , while reducing oscillations at other frequencies outside the band. Frequencies main Radio spectrum class wikitable Frequency Wavelength Designation Abbreviation ref name beasley cite book title ... 9 coauthors Gary M. Miller pages 4 5 ref 3 30 Hz 10 5km 10 4km Extremely low frequency ELF 30 300 Hz 10 4km 10 3km Super low frequency SLF 300 3000 Hz 10 3km 100km Ultra low frequency ULF 3 30 kHz 100km 10km Very low frequency VLF 30 300 kHz 10km 1km Low frequency LF 300 kHz 3 MHz 1km 100m Medium frequency MF 3 30 MHz 100m 10m High frequency HF 30 300 MHz 10m 1m Very high frequency VHF 300 MHz 3 GHz 1m 10cm Ultra high frequency UHF 3 30 GHz 10cm 1cm Super high frequency SHF 30 300 GHz 1cm 1mm Extremely high frequency EHF In medicine Radio frequency RF energy has been used in medical treatments ... resonance imaging MRI uses radio frequency waves to generate images of the human body. RF as a synonym for wireless Although radio frequency is a rate of oscillation, the term radio frequency or its ..., as opposed to communication via an electrical connector . Examples include Radio frequency identification ISO IEC 14443 2 Radio frequency power and signal interface ref cite web url http ... 2001 Identification cards Contactless integrated circuit s cards Proximity cards Part 2 Radio frequency ... Amplitude modulation Electromagnetic radiation Frequency allocation Frequency bandwidth Frequency modulation ... more details
Refimprove introduction and first section date September 2011 Frequency response is the quantitative measure of the output Frequencyspectrumspectrum of a system or device in response to a stimulus, and is used ... level and phase shift relative to the input applying a signal with a wide frequencyspectrum for example ... to in connection with electronic amplifier s, microphone s and loudspeakers . Radio spectrumfrequency ... as a function of frequency, in comparison to the input. In simplest terms, if a sine wave is injected into a system at a given frequency, a linear system will respond at that same frequency with a certain ... is time invariant, then the frequency response also will not vary with time. Two applications of frequency ... Image Butterworth response.svg thumb 300 px Frequency response of a low pass filter with 6 dB per octave or 20 dB per decade Estimating the frequency response for a physical system generally ... FFT . One thing to keep in mind for the analysis is that the frequency content of the input signal must cover the frequency range of interest or the results will not be valid for the portion of the frequency range not covered. The frequency response of a system can be measured by applying a test signal ... signal of the system. The frequency response is characterized by the Amplitude magnitude of the system ... , measured in radians or degrees, versus frequency in radians sec or Hertz Hz . These response measurements ... plots as functions of frequency to obtain a Bode plot by plotting the magnitude and phase angle on a single polar plot with frequency as a parameter to obtain a Nyquist plot or by plotting magnitude and phase on a single rectangular plot with frequency as a parameter to obtain a Nichols plot . For audio systems with nearly uniform time delay at all frequencies, the magnitude versus frequency ... margins gain and phase margins from the open loop frequency response, provided that for the Bode analysis the phase versus frequency plot is included. Applications In electronics this stimulus would ... more details
Medium frequency Medium frequency MF , and the next higher frequencies are known as VHF Very high frequency VHF . The Shortwave range 2.310 25.820 MHz used by international broadcasters is part of the HF frequencyspectrum. In aviation virtually the entire spectrum 2 29.999 MHz is used ...MWband freq 3 to 30 megahertz MHz bands High frequency HF radio frequency radio frequencies are between ... of this portion of the spectrum for such communication varies greatly with a complex combination of factors ... factors contribute, at each point in time for a given communication path, to a Maximum usable frequency MUF Lowest usable high frequency LUF and a Frequency of optimum transmission FOT The maximum usable frequency regularly drops below 10 MHz in darkness during the winter months, while in summer during ... be much higher. The lowest usable frequency depends on the absorption in the lower layer of the ionosphere ... during daytime. The result of these two factors is that the usable spectrum shifts towards the lower frequencies and into the Medium frequency Medium Frequency MF range during winter nights, while on a day in full summer the higher frequencies tend to be more usable, often into the lower Very high frequency ... a transcontinental or worldwide path is open on a particular frequency, Template Digital modes digital ... two HF transceivers. The high frequency band is very popular with amateur radio operators, who can take ... STD 188 141 for automated connectivity and frequency selection, along with the high costs of satellite ... transmissions, are generally prohibited by HF s relatively small chunk of electromagnetic spectrum ... on the HF bands. In recent years, concerns have risen among certain users of the HF spectrum over ... BPL providers have installed notch filters to block out certain portions of the spectrum namely the amateur ... spectrum. In Aviation, HF communication systems are required for all trans oceanic flights. These systems ... Channel Watch . Citation needed date January 2012 Some radio frequency identification RFID tags utilize ... 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
. The solid red line is an u example u of adjusting amplitude vs frequency. The dashed red lines are the corresponding paths of the aliases. The Nyquist frequency , named after the Swedish American engineer Harry Nyquist , is half the sampling frequency of a discrete signal processing system. ref ... frequency 22 date 0 1965&dq 22nyquist frequency 22 date 0 1965&pgis 1 quote The Nyquist frequency is that frequency whose period is two sampling intervals. ref ref cite book title Aerospace Telemetry ...&q 22nyquist frequency 22 date 0 1965&dq 22nyquist frequency 22 date 0 1965&pgis 1 quote the existence of power in the continuous signal spectrum at frequencies higher than the Nyquist frequency is the cause of aliasing error ref It is sometimes known as the Aliasing Folding folding frequency ... 2010 quote Frequencies fold around half the sampling frequency which is why the Nyquist frequency is often referred to as the folding frequency. ref When the continuous function being sampled contains no frequencies equal or higher than the Nyquist frequency, all the Aliasing Sampling sinusoidal functions aliases caused by sampling occur above the Nyquist frequency. The term aliasing usually refers to the case where some original frequency components have aliases below Nyquist. That often causes distortion when a continuous function is subsequently reconstructed from samples. The Nyquist frequency should not be confused with the Nyquist rate , which is the lower bound of the sampling frequency ... bound is twice the bandwidth or maximum component frequency of the signal. Nyquist rate , as commonly ... Nyquist frequency is a property of a discrete time system, not of a signal. While the domain of the signals is commonly time, leading to a Nyquist frequency in Hertz , this does not have to be the case for example, an image sampling system has a Nyquist frequency expressed in units of reciprocal length , such as cycles per meter. The aliasing problem In theory, a Nyquist frequency just larger ... 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
MWband freq 0.3 to 3 megahertz MHz bands Medium frequency MF refers to radio frequency radio frequencies RF in the range of 300 k Hertz Hz to 3 MHz. Part of this band is the medium wave MW AM broadcast band. The MF band is also known as the hectometer band or hectometer wave as the wavelengths ... MF are denoted low frequency LF , and the next higher frequencies are known as high frequency HF . Uses ... and aircraft navigation occupy a band from 190 to 435 kHz, which overlaps from the Low frequency ... around the world. 500 kHz 500 kHz was for many years the maritime International distress frequency distress and emergency frequency , and there are more NDBs between 510 and 530 kHz. Navtex ... ref cite web url http stakeholders.ofcom.org.uk binaries spectrumspectrum policy area spectrum management UK FAT Table 2008 ukfat08.pdf title United Kingdom Frequency Allocation Table 2008 publisher ... title U.S. Frequency Allocation Chart publisher National Telecommunications and Information Administration ... 2182 kHz is the international calling and distress frequency for SSB maritime voice communication ... band into the High frequency HF radio band. ref name yachtcom ref http www.ntia.doc.gov osmhome allochrt.pdf U.S. Government Frequency Allocation Chart ref Propagation Propagation at MF is often via ... on a quiet frequency, but can have the opposite effect in many other cases. For example ... to nothing when the rod points exactly at the transmitter. See also Electromagnetic spectrum Maritime ... Puchstein, Telephone communication, with particular application to medium frequency alternating .... LCCN 25008275 External links Tomislav Stimac, http www.vlf.it frequency bands.html Definition of frequency bands VLF, ELF... etc. . IK1QFK Home Page vlf.it . radio spectrum EMSpectrum Audio broadcasting Use dmy dates date October 2011 Category Radio spectrum de Mittelwelle fa hi nl Medium frequency pt Medium frequency zh ... 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 ..., 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 the spectrum to customers who use their own microwave equipment. ref http biz.yahoo.com ic 140 140181.html ... 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
This article is about the technique in signal processing. The term frequency estimation can also refer to Kernel density estimation probability estimation . Frequency estimation is the process of Estimation theory estimating the complex frequency components of a Digital signal processing signal in the presence of noise ref Hayes, Monson H., Statistical Digital Signal Processing and Modeling , John Wiley & Sons, Inc., 1996. ISBN 0 471 59431 8. ref . The most common methods involve identifying the noise Linear subspace subspace to extract these components. The most popular methods of noise subspace based frequency estimation are Pisarenko harmonic decomposition Pisarenko s Method , Multiple signal classification MUSIC , the eigenvector solution, and the minimum norm solution. For example, consider a signal, math x n math , consisting of a sum of math p math complex exponentials in the presence of white noise , math w n math . This may be represented as math x n sum i 1 p A i e j n omega i w n math . Thus, the power spectrum of math x n math consists of math p math impulses in addition to the power due to noise. The noise subspace methods of frequency estimation are based on Eigendecomposition eigen decomposition of the autocorrelation matrix into a signal subspace and a noise subspace. After these subspaces are identified, a frequency estimation function is used to find the component frequencies from the noise subspace. Methods of frequency estimation Expert subject date April 2009 Pisarenko harmonic decomposition Pisarenko s Method math hat P PHD e j omega frac 1 mathbf e H mathbf v min 2 math Multiple signal classification MUSIC math hat P MU e j omega frac 1 sum i p 1 M mathbf ... loudest frequency, one can use a pitch detection algorithm . If one wants to know all the possibly complex frequency components of a received signal including transmitted signal and noise , one ... DEFAULTSORT Frequency Estimation Category Digital signal processing ... 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
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 v in H math such that math A v lambda v math . If math A lambda I math does not have closed Range mathematics ... 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 ... 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
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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