The emissionspectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic ... to a lower energy state. Each element s emissionspectrum is unique. Therefore, spectroscopy can be used to identify the elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances. Emission In physics , emission is the process ... in energy between the two states. These emitted photons form the element s emissionspectrum. The fact that only certain colors appear in an element s atomic emissionspectrum means that only ... by the atom. The principle of the atomic emissionspectrum explains the varied colors in neon ... Emissionspectrum H.svg none 757px thumb Emissionspectrum of Hydrogen File Emissionspectrum Fe.svg none 757px thumb Emissionspectrum of Iron Radiation from molecules As well as the electronic transitions ... of energy. The emissionspectrum can be used to determine the composition of a material, since it is different ... identifying the composition of star s by analysing the received light. The emissionspectrum ... emissionspectrum. Not all lights emitted by the spectrum are viewable to the naked eye, it also ... Color Simulation of Element EmissionSpectrum Based on NIST data http www.doctortang.com AP 20Chemistry ... coefficient from University of Chicago . BranchesofSpectroscopy DEFAULTSORT EmissionSpectrum Category ... de emiss o ru simple Emissionspectrum sv Emissionslinje uk zh ... one through the emission of a photon , resulting in the production of light . The frequency of light ... of the object through the Stefan Boltzmann law . For most substances, the amount of emission ... of color temperature and emission lines . Precise measurements at many wavelengths allow the identification of a substance via emission spectroscopy . Emission of radiation is typically .... Emission spectroscopy Light consists of electromagnetic radiation of different wavelengths. Therefore ... more details
wiktionary emission emissions Emission may refer to Flue gas , also Exhaust gas , flue gas occurring as a result of the combustion of a fuel Emission of Air pollution air pollutant s Greenhouse gas Greenhouse gas emissions Emission of greenhouse gases , a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range Emission electromagnetic radiation , the process by which the energy of a photon is released by another entity Emission radiocommunications , the radio signal usually modulated emitted from a radio transmitter Emission coefficient , a coefficient in the power output per unit time of an electromagnetic source Emission factor Emission line , or spectral line , a dark or bright line in an otherwise uniform and continuous spectrumEmission nebula , a cloud of ionized gas emitting light of various colors Emission spectroscopy , photoemission spectroscopy, flame emission spectroscopy and other types of spectroscopy Emission standard , requirements that set specific limits to the amount of pollutants that can be released into the environment Emission theory , a competing theory for the special theory of relativity, explaining the results of the Michelson Morley experiment Emission theory vision , the proposal that visual perception is accomplished by rays of light emitted by the eyes Emissions trading , a market based approach used to control pollution ... , the ejecting of semen from the penis also, specifically Nocturnal emission , ejaculation experienced during sleep Light emission Thermionic emission , the flow of charged particles called thermions ... Noise emission see Noise Exhalation , especially where the velocity of exhaled air can influence the harmonic ... See also Emissions control disambiguation disambiguation als Emission bg cs Emise da Emission de Emission fr mission lv Emisija lt Emisija nl Emissie ja no Emisjon nn Emisjon pl Emisja pt Emiss o rm Emissiun ru simple Emission sr fi Emissio sv Emission uk ... more details
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 ... such as energy in electron spectroscopy or mass to charge ratio in mass spectrometry . Spectrum is also ... also commons category Spectrum Physical science Electromagnetic spectrum Visible spectrum or optical spectrum, a subset of the electromagnetic spectrumEmissionspectrum observed in light Absorption spectrum observed in light Energy spectrum 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
unreferenced date December 2010 Band Emission, is the fraction of the total emission from a blackbody that is in a certain wavelength interval or band. For a prescribed temperature, T and the spectral interval from 0 to , is the ratio of the total emissive power of a black body from 0 to to the total emissive power over the entire spectrum. math F 0, lambda frac int 0 lambda E lambda,b d lambda int 0 infty E lambda,b d lambda frac int 0 lambda E lambda,b d lambda sigma T 4 int 0 lambda T frac E lambda,b sigma T 5 d lambda T f lambda T math See also Spectral bands Category Spectroscopy physics stub ... more details
Nebula NGC 3372. Emission nebulae often have dark areas in them which result from interstellar medium ... and emission components such as the Trifid Nebula . References Reflist Category Nebulae Category Emission nebulae ar ca Nebulosa d emissi cs Emisn mlhovina de Emissionsnebel el ... Mg awica emisyjna pt Nebulosa de emiss o ru simple Emission nebula sk Emisn ... more details
shell electrons in high Z atoms. Clearly, the rate of spontaneous emission in free space increases with math omega 3 math . In contrast with atoms, which have a discrete emissionspectrum, quantum dots ... Stimulated emissionEmissionspectrum Spectral line Atomic spectral line Laser science Purcell effect ...Spontaneous emission is the process by which a light source such as an atom , molecule , nanocrystal ..., e.g., the ground state and emits a photon . Spontaneous emission of light or luminescence is a fundamental ... panels, lasers for startup normal continuous operation works by stimulated emission instead and light ... math hbar math is the reduced Planck constant . The phase waves phase of the photon in spontaneous emission ... emission . An energy level diagram illustrating the process of spontaneous emission is shown below ... A 21 math is the rate of spontaneous emission. In the rate equation math A 21 math is a proportionality ... state to an excited state, a field state with one photon in it. Spontaneous emission in free space ... & Ujihara K title Spontaneous emission and laser oscillation in microcavities publisher CRC ...&printsec frontcover&dq 22spontaneous emission 22 PPA6,M1 ref ref name Scully1 cite book author ... from electronic excitation to a photonic excitation the atom must decay by spontaneous emission ... source of photons. This is not spontaneous emission, but is actually nonradiative relaxation of the atoms .... Rate of spontaneous emission The rate of spontaneous emission i.e., the radiative rate can be described ... Solids Clarendon Press, Oxford, UK, 1989 . ref The rate of emission depends on two factors an atomic ... space , the rate of spontaneous emission in the dipole approximation is given by math Gamma rad omega frac omega 3n mu 12 2 3 pi varepsilon 0 hbar c 0 3 math where math omega math is the emission ... 3 math frequency dependence of the spontaneous emission rate as described by Fermi s golden rule ... spontaneous emission rate from CdSe and CdTe nanocrystals Influence of dark states, Physical ... 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
expert subject Physics date August 2011 Acoustic emission AE is a term used to describe the sound waves produced when a material undergoes stress internal change , as a result of an external force. ref Miinshiou Huang, Liang Jiang, Peter K. Liaw, Charlie R. Brooks, Rodger Seeley, and Dwaine L. Klarstrom. http www.tms.org pubs journals JOM 9811 Huang Huang 9811.html tms.org website November 1998 vol. 50, no. 11 JOM . Retrieved 2011 12 05. ref AE is a phenomenon occurring in for instance mechanical loading generating sources of elastic wave s. This occurrence is the result of a small surface displacement of a material produced due to stress wave s ref http www.pacuk.co.uk default.asp?id 53 pacuk.co.uk website . Retrieved 2011 12 05. ref generated when the energy in a material, or on its surface is released rapidly. ref Sotirios J. Vahaviolos 1999 ASTM International publishing http books.google.co.uk books?id 4DPWbD0kuD0C&pg PA81&lpg PA81&dq definition acoustic emission&source bl&ots u0oXgEaZ3p&sig EhwRELUP8 8wtDTUFOa1Z F3B5E&hl en&ei zajcTtO9KcKwhAft0eGDAg&sa X&oi book result&ct result&resnum 11&ved 0CG8Q6AEwCg v onepage&q definition 20acoustic 20emission&f false books.google.co.uk . Retrieved ..., quality control, system feedback, process monitoring and others. Acoustic emission phenomena AE ... within 1 kHz to 1 MHz. Rapid stress releasing events generate a spectrum of stress waves ... testing The application of acoustic emission to non destructive testing of materials in the ultrasound ... Estimation of corrosion in reinforced concrete by electrochemical techniques and acoustic emission ... destructive testing, acoustic emission monitoring has applications in process monitoring. Applications where acoustic emission monitoring has successfully been used include detecting anomalies in fluidized ... links http www.aewg.org history.htm History of the Acoustic Emission Working Group . http www.ndt.net article v07n09 19 19.htm History of the Latin American Working Group on Acoustic Emission ... more details
about the emission theory of relativity the emission theory of vision Emission theory vision Emission ... theory of relativity , explaining the results of the Michelson Morley experiment . Emission theories ... Fox, J. G. title Evidence Against Emission Theories journal American Journal of Physics volume 33 issue ... with emission theory is Isaac Newton . In his Corpuscular theory Newton visualized light corpuscles ... of relativity the constancy of the speed of light in all inertial frames . So different types of emission ... Tolman first Richard Chace title s Some Emission Theories of Light Some Emission Theories of Light ... complete emission theory. ref Citation author Ritz, Walter year 1908 title Recherches critiques ... last Stewart first Oscar M. title The Second Postulate of Relativity and the Electromagnetic Emission ... Dispersion and absorption Extinction i.e., absorption, scattering, and emission of light within the traversed ... Albert Einstein is supposed to have worked on his own emission theory before abandoning it in favor ... that Ritz theory had been very bad in places and that he himself had eventually discarded emission theory ..., Alberto A. journal Physics in Perspective title Ritz, Einstein, and the Emission Hypothesis ... . Refutations of emission theory The following scheme was introduced by de Sitter ref name des to test emission theories math c c pm kv , math where c is the speed of light, v that of the source, c the resultant ... values between 0 and 1. According to special relativity and the stationary aether, k 0, while emission ... emission theories. Astronomical sources File SitterKonstanz.png thumb de Sitter s double star argument ... effect behavior, and this was considered the death knell for Ritzian theory and emission theory .... However, similar observations have been made more recently in the x ray spectrum by Brecher 1977 ... 9 math . ref name brech Hans Thirring argued in 1926, that an atom which is accelerated during the emission ... ark 12148 bpt6k31103.image.f1410 ref The predictions of Ritz s version of emission theory were ... more details
Unreferenced date December 2009 A spurious emission is any radio frequency not deliberately created or transmitted, especially in a device which normally does create other frequencies. A harmonic or other signal outside a transmitter s assigned channel would be considered a spurious emission. From ITU, 1.145 Spurious emissionEmission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products but exclude out of band emissions. DEFAULTSORT Spurious Emission Category Radio technology ja Telecomm stub ... more details
of all possible single die tosses is discrete. One segment of the emissionspectrum of atomic hydrogen is shown below. Note that we see only four lines. File Emissionspectrum H.svg 757px thumb none Emissionspectrum of Hydrogen By contrast, the solar spectrum, the spectrum of electromagnetic frequencies ...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 emissionspectrum or absorption spectrum for which there is only an integer number or countable number of intensities. Atomic electronic absorption and emissionspectrum are discrete, as contrasted with, for example, the emissionspectrum 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 ... 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
In atomic physics , exoelectron emission EE is a weak electron emission, appearing only from pretreated irradiated, deformed etc objects. ref name Oster1999 citation last Oster first L. year 1999 title Classification of Exoelectron Emission Mechanisms journal Phys. Status Solidi A volume 174 issue 2 pages 431 doi 10.1002 SICI 1521 396X 199908 174 2 431 AID PSSA431 3.0.CO 2 Z last2 Yaskolko first2 V. last3 Haddad first3 J. bibcode 1999PSSAR.174..431O ref ref name Gerasimov1976 citation last Gerasimov first A. B. year 1976 title On the physical mechanism of exoelectron emission journal Phys. Status Solidi A volume 35 issue 2 pages K131 doi 10.1002 pssa.2210350256 last2 Dolidze first2 G. M. last3 Mizandari first3 L. A. last4 Tsertsvadze first4 A. A. bibcode 1976PSSAR..35..131G ref The pretreatment excitation turns the objects into an unequilibrial state. EE accompanies the relaxation of these unequilibria. The relaxation can be stimulated e.g. by slight heating or longwave illumination, not causing emission from untreated samples. Accordingly, thermo and photostimulated EE TSEE, PSEE are distinguished. Thus, EE is an electron emission analogue of such optical phenomena as phosphorescence , thermo and photostimulated luminescence . References Reflist Category Atomic, molecular, and optical physics nuclear stub ... more details
Proton emission also known as proton radioactivity is a type of radioactive decay in which a proton is ejected from a atomic nucleus nucleus . Image Zerfallsschema.png left thumb 300px The decay of a proton rich nucleus A populates excited states of a daughter nucleus B by emission or electron capture EC . Those excited states that lie below the separation energy for protons Sp decay by emission towards the groundstate of daughter B. For the higher excited states a competitive decay channel of proton emission to the granddaughter C exists, called delayed proton emission. Proton emission can occur from high lying excited states in a nucleus following a beta decay , in which case the process is known as beta delayed proton emission, or can occur from the ground state or a low lying nuclear isomer isomer of very proton rich nuclei, in which case the process is very similar to alpha decay . For a proton to escape a nucleus, the proton separation energy must be negative the proton is therefore unbound, and Quantum tunneling tunnels out of the nucleus in a finite time. Proton emission is not seen in naturally occurring isotopes proton emitters can be produced via nuclear reaction s, usually utilising some kind of particle accelerator . Although prompt i.e. not beta delayed proton emission was observed from an isomer in Cobalt Isotopes Cobalt 53 as early as 1969, no other proton emitting states were found until 1981, when the proton radioactive ground states of Lutetium Isotopes Lutetium 151 and Thulium Isotopes Thulium 147 were observed at experiments at the Gesellschaft f r Schwerionenforschung GSI in West Germany. Citation needed date December 2007 Research in the field ... emission. The study of proton emission has aided the understanding of nuclear deformation, masses ... emission of two protons was observed from the nucleus Iron Isotopes Iron 45 in experiments at Gesellschaft ... Emission Categories Category Nuclear physics Category Radioactivity Interwiki de Protonenemission fr ... more details
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 spectrumEmissionspectrum observed in light Absorption spectrum observed in light Spectral class of stars ... distribution of an illuminant Energy spectrum of a collection of particles particle physics Frequency spectrum of a signal Power spectrum of a signal Harmonic series music spectrum of sound energy ... 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
Zero emission refers to an engine , electric motor motor , or other energy source, that emits no waste products that pollutes the environment or disrupts the climate. Zero emission engines Vehicles and other mobile machinery used for transport over land, sea, air, rail and for other uses agricultural, mobile power generation, etc. contribute heavily to climate change and pollution, so zero emission engines are an area of active research. These technologies almost in all cases include an Electric motor electric engine powered by an energy source compact enough to be installed in the vehicle. These sources include hydrogen fuel cell s, Traction battery batteries , supercapacitors , and flywheel energy storage devices. In some cases, such as Air engine compressed air engines , the engine may be mechanical rather than electrical. This mechanical engine is then powered by a passive energy source like compressed air , or a combustible non polluting gas like hydrogen . The above engines can be used in all vehicles, from cars to boats to propeller airplanes. For boats, energy sources such as nuclear power and Photovoltaics solar panels can also be a viable option, in addition to traditional sail s and turbosail s. A concept like vegetable oil economy produces emissions however, the only emissions are things that were first taken out of the atmosphere when the plants were growing. So there is no net emission. See also Air engine Carbon neutrality Zero emission project Zero Emissions Research and Initiatives Zero emissions vehicle References cite book last Dixon first Lloyd coauthors Isaac Porche, Jonathan Kulick title Driving Emissions to Zero Are the Benefits of California s Zero Emission Vehicle Program Worth the Costs? publisher RAND Corporation year 2002 isbn 0 8330 3212 7 External ... Description of what zero emission means Category Green vehicles Category Zero emissions vehicles Category Emission standards de Nullemission it Emissioni zero ja ... more details
Emission is the radiation or radio signal produced or emitted by a radio station radio transmitting station . ref ITU Radio Regulations , Volume 1, Article 1, Provision No. 1.138 Edition of 2008 ref References Reflist Category Radio terminology radio comm stub ... more details
Nasal emission is the abnormal passing of oral air through a palatal cleft , or from some other type of Velopharyngeal inadequacy velopharyngeal inadequacy VPI , during the production of a consonant that requires a buildup of oral air pressure for proper pronunciation , such as p or s . The escaping air tends to reduce the oral air pressure and impede the proper production of the consonant. Secondary effects sometimes noted with nasal emission are the development of improper compensatory pronunciation habits, including using a very soft voice that uses less breath pressure. Nasal emission can be detected by a number of simple techniques, such as looking for the fogging of a mirror held under the nares ref http www.asha.org about publications leader online archives 2006 060207 060207c.htm Kummer, A. W. 2006, Feb. 7 . Resonance disorders and nasal emission Evaluation and treatment using low tech and no tech procedures. The ASHA Leader, 11 2 , 4, 26. ref or measured more definitively by means of a nasal pneumotachograph, as in the http www.microtronics nc.com Perci sar.htm Perci Sar system or the http www.glottal.com Products NVS.htm NE2 NEM system system from http www.glottal.com Glottal Enterprises . The measurement of nasal emission in consonants is linked with the measurement of nasalance in vowels under the term nasometry . See also Nasalization Nasalance nasometry http www.microtronics nc.com Perci sar.htm Perci Sar http www.glottal.com Products NVS.htm Glottal Enterprises NVS System References references Category Nose Category Phonetics Category Speech impediments ... more details
Orphan date March 2009 Infobox Software name Nepal eMission logo screenshot caption Typical Connect meeting with discussion series of pods displayed developer Nepal Software Inc. Borgarnes , Iceland latest release version latest release date operating system Microsoft Windows genre Screencast , Video capture , Streaming media license Proprietary software Proprietary website http www.emission.is Nepal eMission software homepage Nepal eMission is a software from Nepal Software, Borgarnes , Iceland , used to record lectures and seminars . The software is primary made for Education educators in all levels ref http www.emission.is Nepal eMission software homepage ref . Technology Nepal eMission is built with .NET Framework Microsoft .NET Framework , and based on Windows Media Microsoft Windows Media framework ref cite web url http www.nepal.is default.asp?sid id 6094&tre rod 003 &tId 1 title Nepal vefumsj n ref . Main functions is to record computer screen with speech from a microphone, connected to computer. You can also record video, if you connect a Webcam or Video camera to your computer. Built in function is also possibility to upload your movie to a Microsoft Media Server , and automatically publish a link to the movie in for example a Learning management system Learning Management System . Nepal eMission is also a Media player application software media player built with Microsoft Silverlight Microsoft Silverlight technology , for play these movie, uploaded on Microsoft Media Server . References references See also List of screencasting software Category Multimedia Category Screencasting software Category Microsoft Windows multimedia technology Category Podcasting software ... more details
Emission standards are requirements that set specific limits to the amount of Air pollution pollutants ... monoxide CO , or volatile hydrocarbon s see carbon dioxide equivalent . Vehicle Emission performance standard Ref improve section date January 2009 An emission performance standard is a limit that sets thresholds above which a different type of emission control technology might be needed. While emission performance standards have been used to dictate limits for conventional pollutants such as oxides ... CO sub 2 sub MWhr elsewhere. Americas Expand section date June 2008 USA Main United States emission ... Air Quality Standards . Europe European Union Main European emission standards The European Union has ... Parliament has suggested introducing mandatory CO sub 2 sub emission standards ref name Parl ... regulating CO sub 2 sub emissions from electricity generation via emission performance standards .... China s State Environmental Protection Administration SEPA upgraded emission controls again on July ... 07 07 content 346332.htm title China to adopt auto emission standard equal to Euro III in 2008 publisher Chinadaily.com.cn date 2004 07 07 accessdate 2011 02 02 ref More stringent emission standard, National ... web url http english.cri.cn 2946 2007 07 02 176 244647.htm title China Launches Tougher Auto Emission ... Stage emission standards Background The first Indian emission regulations were idle emission limits which became effective in 1989. These idle emission regulations were soon replaced by mass emission .... Since the year 2000, India started adopting European emission and fuel regulations for four wheeled light duty and for heavy dc. Indian own emission regulations still apply to two and three wheeled ... 2 4 emission and fuel regulations by 2010. The implementation schedule of EU emission standards in India is summarized in Table 1. ref cite web url http www.siamindia.com scripts emission standards.aspx title Vehicular Technology in India & 124 Emission Norms publisher SIAM India date accessdate 2011 ... more details
Nuclear physics Positron emission or beta plus decay Beta particle sup sup decay is a particular type of radioactive decay, called beta decay , in which a proton is converted to a neutron , and it releases a positron and a neutrino . Isotope s which undergo this decay and thereby emit positrons include carbon 11 , Isotopes of potassium potassium 40 , nitrogen 13 , Isotopes of oxygen oxygen 15 , fluorine 18 , and Isotopes of iodine iodine 121 . As an example, the following equation describes the beta plus decay of carbon 11 to boron 11, emitting a positron and a neutrino Autogenerated using Phykiformulae 0.12 User SkyLined Phykiformulae C 11 B 11 e ve 0.96 MeV border 0 style height 2em Nuclide Link carbon 11 Nuclide Link boron 11 SubatomicParticle link yes Positron SubatomicParticle link yes Electron Neutrino 0.96 electron volt MeV Inside protons and neutrons, there are fundamental particles called quark s. The two most common types of quarks are up quarks, which have a charge of sup 2 sup sub 3 sub and down quarks, with a sup 1 sup sub 3 sub charge. Quarks arrange themselves in sets of three such that they make proton s and neutron s. In a proton, whose charge is 1, there are two up quarks and one down quark. Neutrons, with no charge .... It is this that causes beta radiation. Positron emission happens when an up quark changes into a down quark. These isotopes are used in positron emission tomography , a technique used for medical ... by positron emission. Nuclei which decay by positron emission may also decay by electron capture . For low ... goes up, so does the branching ratio towards positron emission. However, if the energy difference is less than 2 m sub e sub c sup 2 sup , then positron emission cannot occur and electron ... for positron emission. External links Image Ndslivechart.png http www nds.iaea.org livechart The LIVEChart of Nuclides IAEA with filter on sup sup decay nuclear processes DEFAULTSORT Positron Emission ... more details
Secondary emission in physics is a phenomenon where primary incident particles of sufficient energy , when hitting a surface or passing through some material, induce the emission of secondary particles. The primary particles are often charged particle s like electron s or ion s. If the secondary particles are electrons, the effect is termed secondary electrons secondary electron emission. ref R. Kollath, Secondary electron emission of solids irradiated by electrons, Encyclopedia of Physics ed. S. Fl gge Vol. 21, p. 232 303 1956, in German ref In this case, the number of secondary electrons emitted per incident particle is called secondary emission yield . If the secondary particles are ions, the effect is termed secondary ion emission. Applications Secondary emissive materials Most common used secondary emissive materials include alkali antimonide, beryllium oxide BeO , magnesium oxide MgO , gallium phosphide GaP , gallium arsenide phosphide GaAsP , lead oxide PbO , etc. Photo multipliers and similar devices Secondary emission is a phenomenon where additional electrons, called secondary electrons, are emitted from the surface of a material when an incident particle often, charged particle ... electrons emitted per incident particle is called secondary emission yield. The effect can also be exploited ... electrons from its surface through secondary emission. These new electrons are then accelerated ... emission to store bits on the tube face. Another random access computer memory tube based on secondary emission was the Selectron tube . Both were made obsolete by the invention of magnetic core memory . Undesirable effects Secondary emission can be undesirable such as in the tetrode thermionic ... sufficiently to cause secondary emission at the anode Plate electrode plate . This can give rise to excessive ... early types with anodes not treated to reduce secondary emission, exhibiting a negative resistance ... footer DEFAULTSORT Secondary Emission Category Condensed matter physics Category Vacuum tubes ... more details
Infobox Album See Wikipedia WikiProject Albums Name Emission Phase Type studio Artist Detonation band Detonation Cover Emission Phase.jpg Released April 30, 2007 Recorded January, 2007 Genre Melodic death metal Length 49 22 Label Osmose Productions Producer Jochem Jacobs br Bouke Visser Reviews Last album Portals to Uphobia br 2005 This album Emission Phase br 2007 Next album Emission Phase is the third full length studio album by the band Detonation band Detonation and was released by the France French label Osmose Productions . The artwork was made by http www.elirankantor.com index.php?page detonation Eliran Kantor . Track listing Invoking the Impact 4 07 When Stone Turns to Ash 4 53 Craven Ablaze 4 14 Chokedamp 5 34 Defects of the Isolated Mind 4 17 Modulate 3 54 Into the Emission Phase 5 30 Infected 3 52 2nd Sun Ascending instrumental 1 57 Soul Severance 3 53 Reborn from the Radiance 4 38 Fallout instrumental 2 33 Credits Band members Koen Romeijn Death growl Vocals , Electric guitar Guitar Mike Ferguson Electric guitar Guitar Thomas Kalksma Drum kit Drums Otto Schimmelpenninck Bass guitar Other http www.elirankantor.com index.php?page detonation Eliran Kantor Album cover Cover Artwork Category Detonation albums Category 2007 albums 2000s death metal album stub ... more details
primary sources date January 2010 refimprove date January 2010 infobox record label name Edelweiss Emission image Image Logo completo de edelweiss y edelweiss emission.jpg parent founded 1989 founder distributor Edelweiss Emission genre classical and ancient music country Switzerland url http www.edelweissemission.com Edelweiss Emission is a Swiss independent record label that was founded in 1989. It is dedicated to classical and ancient music. Artists who have recorded for the Edelweiss Emission label include the Argentine classical pianist Daniel Levy classical pianist , the baritone and conductor Dietrich Fischer Dieskau , the Philharmonia Orchestra , the baritone Wolfgang Holzmair , the Polish Italian cellist Franco Maggio Ormezowski, the ensemble Ars Antiqua de Paris and the sitarist, Ravi Shankar . Recording venues include Abbey Road Studios in London , The Barocksaal in Austria and the Scuola Grande di San Giovanni Evangelista in Venice , among others. The label has a wide catalogue of recordings, with a repertoire that ranges from music of the Middle Ages and Renaissance G. de Machaut Venetian Music from the 16th century and Elizabethan Music, to the golden age of classical music, from Bach up to the romantic period. The catalogue also includes improvisations and contemporary classical music. See also List of record labels References http www.edelweissemission.com Edelweiss Emission s website http www.academyofeuphony.com International Academy of Euphony s website http www.musicweb international.com recordD K.htm MusicWeb International http www.allrecordlabels.com db 3 24873.html allrecordlabels.com http magazin.klassik.com records teaser.cfm?RECID 3152 Klassik.com External links http www.edelweissemission.com Official Website Category Classical music record labels Category Independent record labels ... more details
An Air pollution emission inventory is an accounting of the amount of pollutants discharged into the atmosphere . An emission inventory usually contains the total emissions for one or more specific greenhouse ... and within a specified time span, usually a specific year. An emission inventory is generally characterized ... period over which emissions are estimated, How The methodology to use. Emission inventories are compiled for both scientific applications and for use in policy processes. Use of Emission Inventories ... problems and in monitoring progress towards solving these. Emission inventories provide this type of information. Emission inventories are developed for a variety of purposes Policy use by policy makers to track progress towards emission reduction targets, develop strategies and policies or Scientific ... by scientists as inputs to air quality models. Policy use Two more or less independent types of emission ... this type of emissions reporting aims at monitoring the progress towards agreed national emission reduction targets Regular emission reporting by individual industrial facilities in response to legal obligations this type of emission reporting is developed to support public participation in decision ... are the annual emission inventories as reported to the United Nations Framework Convention on Climate Change UNFCCC ref Greenhouse gas emission inventories can be found at the UNFCCC website at http ... . Policy users typically are interested in annual total emission only. Scientific use Atmospheric ... area. Air emission inventories provide this type of information. Depending on the spatial and temporal ... to be increased beyond what is available from national emission inventories as repoprted to the international conventions and protocols. Compilation of Emission Inventories For each of the pollutants ... constant emission factor . Why the source categories To compile an emission inventory, all sources ..., but in most cases the source categories listed above will be included. What the pollutants Emission ... more details
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