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Look up emission in Wiktionary, the free dictionary. Emission may refer to: Emission of air pollutants, notably: Flue gas, gas exiting to the atmosphere...

ejaculation (nocturnal emission) and orgasm for a male, and vaginal lubrication and/or orgasm for a female. Nocturnal emissions can happen after dreams...

The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation. Thermal radiation is electromagnetic radiation...

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making...

Spontaneous emission is the process in which a quantum mechanical system (such as a molecule, an atom or a subatomic particle) transitions from an excited...

electron emission is specifically the emission of electrons and occurs when thermal energy overcomes the material's work function. After emission, an opposite...

stimulated emission of electromagnetic radiation. The word laser originated as an acronym for light amplification by stimulated emission of radiation...

Stimulated emission is the process by which an incoming photon of a specific frequency can interact with an excited atomic electron (or other excited molecular...

Positron emission, beta plus decay, or β+ decay is a subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is...

Neutron emission is a mode of radioactive decay in which one or more neutrons are ejected from a nucleus. It occurs in the most neutron-rich/proton-deficient...

Field electron emission, also known as field-induced electron emission, field emission (FE) and electron field emission, is the emission of electrons from...

Voluntary Emission Reductions or Verified Emission Reductions (VERs) are a type of carbon offset exchanged in the voluntary or over-the-counter market...

Greenhouse gas emissions (GHG emissions) from human activities intensify the greenhouse effect which contributes to climate change. Carbon dioxide (CO2)...

The Volkswagen emissions scandal, sometimes known as Dieselgate or Emissionsgate, began in September 2015, when the United States Environmental Protection...

The European emission standards are vehicle emission standards that regulate pollution from the use of new land surface vehicles sold in the European...

Proton emission (also known as proton radioactivity) is a rare type of radioactive decay in which a proton is ejected from a nucleus. Proton emission can...

Emission standards are the legal requirements governing air pollutants released into the atmosphere. Emission standards set quantitative limits on the...

development. Ejaculation can occur spontaneously during sleep (a nocturnal emission or "wet dream") or in rare cases because of prostatic disease. Anejaculation...

Emission theory may refer to: Emission theory (relativity), a former competing theory for the special theory of relativity Emission theory (vision), a...

strikes and terrestrial gamma-ray flashes, which produce high energy emissions from natural high-energy voltages. Gamma rays are produced by a number...

A field-emission display (FED) is a flat panel display technology that uses large-area field electron emission sources to provide electrons that strike...

Emissions control may refer to: EMCON, military state of minimal radio emissions Technology involved in vehicle emissions control Regulation of air pollution...

A zero emission engine, motor, process, or other energy source emits no waste products that pollute the environment or disrupt the climate. Vehicles and...

Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs when a material undergoes irreversible changes...

An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet...

Carbon emission trading (also called carbon market, emission trading scheme (ETS) or cap and trade) is a type of emissions trading scheme designed for...

Positron emission tomography (PET) is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes...

The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation such as ultraviolet light. Electrons emitted...

An emission intensity (also carbon intensity or C.I.) is the emission rate of a given pollutant relative to the intensity of a specific activity, or an...

Field-emission microscopy (FEM) is an analytical technique that is used in materials science to study the surfaces of needle apexes. The FEM was invented...

Emission control areas (ECAs), or sulfur emission control areas (SECAs), are sea areas in which stricter controls were established to minimize airborne...

(organic EL) diode, is a type of light-emitting diode (LED) in which the emissive electroluminescent layer is an organic compound film that emits light in...

Sources of methane emissions due to human activity (year 2020 estimates) Fossil Fuel Use (33.0%) Animal Agriculture (30.0%) Plant Agriculture (18.0%)...

proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron...

Thermal emission may refer to: Thermionic emission, the liberation of charged particles from an electrode due to thermal energy Thermal radiation, electromagnetic...

Emission theory or extramission theory (variants: extromission) or extromissionism is the proposal that visual perception is accomplished by eye beams...

In particle physics, secondary emission is a phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through...

Dry low emission (abbreviation DLE) is a technology that reduces NOx emissions that exhausts out of gas fired turbines. The amount of NOx produced depends...

emission-line region (LINER) is a type of galactic nucleus that is defined by its spectral line emission. The spectra typically include line emission...

In physics, electron emission is the ejection of an electron from the surface of matter, or, in beta decay (β− decay), where a beta particle (a fast energetic...

In radio communication, a spurious emission is any component of a radiated radio frequency signal, the complete suppression of which, would not impair...

Bharat stage emission standards (BSES) (lit. 'India stage emission standards') are emission standards instituted by the Government of India to regulate...

Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines. The primary emissions studied...

Atomic emission spectroscopy (AES) is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular...

panels show emission lines caused by atomic nickel (Ni I), and the right panel shows weak emission lines caused by cyanide (CN) gas. These emission lines grew...

through amplification by stimulated emission. The term is an acronym for microwave amplification by stimulated emission of radiation. Nikolay Basov, Alexander...

A partial zero-emission vehicle, in the United States, is an automobile that has zero evaporative emissions from its fuel system, has a 15-year (or at...

A low-emission zone (LEZ) is a defined area where access by some polluting vehicles is restricted or deterred with the aim of improving air quality. This...

This high rate of warming is caused by a combination of greenhouse gas emissions being at an all-time high of 53.6±5.2 Gt CO2e per year over the last decade...

Aggregation-induced emission (AIE) is a phenomenon in which certain organic luminophores (fluorescent dyes) exhibit stronger emission of light in their...

Heat emission may refer to: Climate change Heat transfer Thermal radiation Thermal pollution This disambiguation page lists articles associated with the...

The backronym later adopted for the phenomenon is the Strong Thermal Emission Velocity Enhancement. According to analysis of satellite data from the...

An emission inventory (or emissions inventory) is an accounting of the amount of pollutants discharged into the atmosphere. An emission inventory usually...

reduce greenhouse gas emissions, based on the scientific consensus that global warming is occurring and that human-made CO2 emissions are driving it. The...

region in an otherwise uniform and continuous spectrum. It may result from emission or absorption of light in a narrow frequency range, compared with the nearby...

warming, as the warming impact of greenhouse gas emissions was offset by cooling from sulfur dioxide emissions. Sulfur dioxide causes acid rain, but it also...

Global net-zero emissions are reached when greenhouse gas emissions and removals due to human activities are in balance. Net-zero emissions is often shortened...

electric buses. From 2021, all new buses will be zero emission, and the entire bus fleet will be zero emission by 2034, although Transport for London (TfL) have...

Tropospheric Emission Spectrometer or TES was a satellite instrument designed to measure the state of the earth's troposphere. TES was a high-resolution...

In atomic physics, exoelectron emission (EE) is a weak electron emission, appearing only from pretreated (irradiated, deformed etc.) objects. The pretreatment...

Fugitive emissions are leaks and other irregular releases of gases or vapors from a pressurized containment – such as appliances, storage tanks, pipelines...

The European Union Emissions Trading System (EU ETS) is a carbon emission trading scheme (or cap and trade scheme) that began in 2005 and is intended to...

the carbon emissions from producing goods and services. Carbon taxes are intended to make visible the hidden social costs of carbon emissions. They are...

Laser-induced white emission (LIWE) is a broadband light in the visible spectral range. This phenomenon was reported for the first time by Jiwei Wang and...

The emission reduction unit (ERU) was an emissions unit issued under a Joint Implementation project in terms of the Kyoto Protocol. An ERU represented...

TON 618 (abbreviation of Tonantzintla 618) is a hyperluminous, broad-emission-line, radio-loud quasar, and Lyman-alpha blob located near the border of...

pattern called an exhaust plume. It is a major component of motor vehicle emissions (and from stationary internal combustion engines), which can also include...

Marie and Pierre Curie also coined the term "radioactivity" to define the emission of ionizing radiation by some heavy elements. (Later the term was generalized...

A carbon emission label or carbon label describes the carbon dioxide emissions created as a by-product of manufacturing, transporting, or disposing of...

The Ultra Low Emission Zone (ULEZ) is an area in London, England, where an emissions standard based charge is applied to non-compliant road vehicles. Plans...

Nasal emission is the abnormal passing of oral air through a cleft palate, or from some other type of velopharyngeal inadequacy (VPI), during the production...

responsibilities is to define vehicle emissions standards. California is the only state permitted to issue emissions standards under the federal Clean Air...

agreed system for classifying radio frequency signals. Each type of radio emission is classified according to its bandwidth, method of modulation, nature...

Amplified spontaneous emission (ASE) or superluminescence is light, produced by spontaneous emission, that has been optically amplified by the process...

Self-amplified spontaneous emission (SASE) is a process within a free-electron laser (FEL) by which a laser beam is created from a high-energy electron...

list of sovereign states and territories by per capita carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created...

Emissions trading is a market-oriented approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. The...

The unidentified infrared emission (UIR or UIE) bands are infrared discrete emissions from circumstellar regions, interstellar media, star-forming regions...

EmissionML (Emission Event Modeling Language) is an open and interoperable ontology and data model standard developed by the Open Geospatial Consortium...

A field emission gun (FEG) is a type of electron gun in which a sharply pointed Müller-type[clarification needed] emitter is held at several kilovolts...

{\displaystyle {\ce {H3+}}} emission, and it is known that density is the dominant controller of its resulting emission. The "Great 'Cold' Spot" is one...

A low-emission vehicle is a motor vehicle that emits relatively low levels of motor vehicle emissions. The term may be used in a general sense, but in...

that they expect to purchase only zero-emission buses from 2029 onwards, and aim to have a fully zero-emission bus fleet by 2040. New York City is home...

New Zealand Emissions Trading Scheme (NZ ETS) is an all-gases partial-coverage uncapped domestic emissions trading scheme for emissions of greenhouse...

An otoacoustic emission (OAE) is a sound that is generated from within the inner ear. Having been predicted by Austrian astrophysicist Thomas Gold in 1948...

Certified emission reductions (CERs) are a type of emission unit (or carbon credits) issued by the Clean Development Mechanism (CDM) Executive Board for...

output versus lead-acid batteries—has revived public interest as zero-emission vehicle options. Manufacturers mostly switched to hybrids that use internal...

Zero Emission Industries, Inc. (ZEI) is an American hydrogen technology company founded in 2018 and headquartered in the San Francisco Bay Area. Previously...

An emission test cycle is a protocol contained in an emission standard to allow repeatable and comparable measurement of exhaust emissions for different...

emissions are known in spectral bands other than visible light. Delayed emission is called phosphorescence. Quantum mechanics also governs emission,...

Emission channeling is an experimental technique for identifying the position of short-lived radioactive atoms in the lattice of a single crystal. When...

four emission mechanisms are thermal bremsstrahlung (braking) emission, gyromagnetic emission, plasma emission, and electron-cyclotron maser emission. The...

particle emission, and mp is the mass of the emitted (alpha-)particle, one finds that in certain cases it is positive and so alpha particle emission is possible...

A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine...

An emission-line star is a star whose spectrum exhibits emission lines in the optical spectra. Common types include: Be star Herbig Ae/Be star Shell star...

Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively coupled plasma optical emission spectroscopy (ICP-OES), is...

field enhanced thermionic emission is a phenomenon in condensed matter physics named after Walter H. Schottky. In electron emission devices, especially electron...

Emission computed tomography (ECT) is a type of tomography involving radioactive or emissions. Types include positron emission tomography (PET) and Single-photon...

An ultra-low-emission vehicle (ULEV) is a motor vehicle that emits extremely low levels of motor vehicle emissions compared to other vehicles. In some...

Emission theory, also called emitter theory or ballistic theory of light, was a competing theory for the special theory of relativity, explaining the results...

Mechanically stimulated gas emission (MSGE) is a complex phenomenon embracing various physical and chemical processes occurring on the surface and in the...

TWh by 2050, and that with the progress currently seen, greenhouse gas emissions attributable to space cooling would double from 1,135 million tons (2016)...

The London Low Emission Zone (LEZ) is an area of London in which an emissions standard based charge is applied to non-compliant commercial vehicles. Its...

a temperature greater than absolute zero emits thermal radiation. The emission of energy arises from a combination of electronic, molecular, and lattice...

Kirchhoff's law of thermal radiation refers to wavelength-specific radiative emission and absorption by a material body in thermodynamic equilibrium, including...

In spectroscopy, collision-induced absorption and emission refers to spectral features generated by inelastic collisions of molecules in a gas. Such inelastic...

processes such as atoms in a maser emitting microwave photons, radio wave emission and absorption is usually regarded as a continuous classical process, governed...

certificate) that conveys a claim to have avoided greenhouse gas (GHG) emissions or to have enhanced removal of GHG from the atmosphere. One carbon credit...

X-ray emission spectroscopy (XES) is a form of X-ray spectroscopy in which a core electron is excited by an incident X-ray photon and then this excited...

reducing the same amount of emissions (or rate of emissions) in the future. According to this conjecture, carbon emissions are subject to a discount rate...

Luminescence is the emission of optical radiation (ultraviolet, visible, or infrared) by a substance due to a process other than heating. In the broad...

The Emission Reduction Regulation 2019 (EU) 2019/631 is an EU regulation that requires progressive reduction in emissions by petrol or diesel vehicles...

(Kα) emission. Similarly, when an electron falls from the M shell to the K shell, the X-ray radiation emitted is called a K-beta (Kβ) emission. K-alpha...

Positron emission mammography (PEM) is a nuclear medicine imaging modality used to detect or characterise breast cancer. Mammography typically refers to...

stars h tag used (e.g. WN9h) for WR with hydrogen emission and ha (e.g. WN6ha) for both hydrogen emission and absorption WN/C – WN stars plus strong C IV...

A zero-emission vehicle (ZEV) is a vehicle that does not emit exhaust gas or other pollutants from the onboard source of power. The California definition...

Forest reference emission levels (FRELs) and related forest reference levels (FRLs) are benchmarks used under the United Nations Framework Convention on...

Brain positron emission tomography is a form of positron emission tomography (PET) that is used to measure brain metabolism and the distribution of exogenous...

absorption or emission of a photon by an atom or molecule. The Einstein A coefficients are related to the rate of spontaneous emission of light, and the...

Sound amplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation. It focuses sound waves in a way that...

The Oxford zero emission zone is the first zero emission zone (ZEZ) in the United Kingdom. Launched on 28 February 2022, the scheme covers nine streets...

Ionized-air glow is the luminescent emission of characteristic blue–purple–violet light, often of a color called electric blue, by air subjected to an...

Lyman-alpha, typically denoted by Ly-α or Lyα, is a spectral line of hydrogen (or, more generally, of any one-electron atom) in the Lyman series. A photon...

field is called cyclotron emission. For particles in the mildly relativistic range (≈85% of the speed of light), the emission is termed gyro-synchrotron...

Handbook Emission Factors for Road Transport (HBEFA) is a Microsoft Access database application providing emission factors, i.e. the specific emissions in g/km...

Particle-induced X-ray emission or proton-induced X-ray emission (PIXE) is a technique used for determining the elemental composition of a material or...

nitrogen dioxide emissions, and are a major cause of climate change. Vehicles with petrol and diesel engines produce about half of their emissions from their...

astronomy, spinning dust emission is a mechanism proposed to explain anomalous microwave emission from the Milky Way. The emission could arise from the electric...

N44 is an emission nebula with superbubble structure located in the Large Magellanic Cloud, a satellite galaxy of the Milky Way in the constellation Dorado...

and X-ray emission from supernova remnants originates from ionized gas, a great amount of the radio emission is a form of non-thermal emission called synchrotron...

Positron emission tomography–computed tomography (better known as PET–CT or PET/CT) is a nuclear medicine technique which combines, in a single gantry...

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...

high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable....

Conducted emissions are the effects in power quality that occur via electrical and magnetic coupling, electronic switch of semiconductor devices, which...

United States vehicle emission standards are set through a combination of legislative mandates enacted by Congress through Clean Air Act (CAA) amendments...

rate proportional to N) of a group of independent atoms (see spontaneous emission). Superradiance has since been demonstrated in a wide variety of physical...

interact so little with matter, it is thought that a supernova's neutrino emissions carry information about the innermost regions of the explosion. Much of...

emission of electromagnetic radiation (EMR) during plastic deformation and crack propagation in metals and rocks has been studied. The EMR emissions from...

Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) is a program which utilizes high-altitude balloon instrument package intended...

The Thermal Emission Spectrometer (TES) was an instrument on board Mars Global Surveyor. TES collected two types of data, hyperspectral thermal infrared...

of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum. This emission may arise in molecular clouds...

classifying primary light sources is on the basis of the mechanism(s) of light emission. Light is generated when an electric charge undergoes acceleration, typically...

normal; I = I0 cos θ. The law is also known as the cosine emission law or Lambert's emission law. It is named after Johann Heinrich Lambert, from his Photometria...

experience significant impacts from global food price volatility. Historical emissions from Asia are lower than those from Europe and North America. However...

to produce an excitation spectrum. An excitation-emission matrix is obtained by recording the emission spectra resulting from a range of excitation wavelengths...

emissions is to measure the embedded emissions of goods that are being consumed (also referred to as "embodied emissions", "embodied carbon emissions"...

Non-exhaust emissions come from wearing down motor vehicle brake pads, tires, roads themselves, and unsettling of particles on the road. This particulate...

Nocturnal Emissions is Nigel Ayers's sound art project that has released numerous records and CDs in music styles ranging from electro-acoustic, musique...

In physics, induced gamma emission (IGE) refers to the process of fluorescent emission of gamma rays from excited nuclei, usually involving a specific...

in an atom is filled by an electron, releasing energy that causes the emission of another electron from a different shell of the same atom. When a core...

greenhouse gas emissions by 2040, knowing that it had already started generating about 57 million metric tonnes of greenhouse gas emissions globally in 2019...

The Emissions Database for Global Atmospheric Research (EDGAR) is a joint project of the European Commission Joint Research Centre and the Netherlands...

Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is...

concept used in politics of climate change to help set greenhouse gas emissions reduction targets in a fair and effective way. It examines the "maximum...

Energy portal A mobile emission reduction credit (MERC) is an emission reduction credit generated within the transportation sector. The term “mobile sources”...

its magnetic poles. This radiation can be observed only when a beam of emission is pointing toward Earth (similar to the way a lighthouse can be seen only...

This is a list of sovereign states and territories by carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created...

A gas emissions crater or GEC is a crater that is left by an explosion that is believed to be caused by an overheated buildup of gas stuck below a layer...

imaging system called a CDose, which is specially designed to view light emissions from biological systems. For decades, patients had reported phenomena...

the atmosphere. 2022 assessments emphasize that global greenhouse gas emissions must peak before 2025 and decline by about 43% by 2030 to limit warming...

equipment against such spying. The protection efforts are also known as emission security (EMSEC), which is a subset of communications security (COMSEC)...

as a filter or afterburner. Research and development on safer and lower-emission stoves is continuously evolving. Look up stove in Wiktionary, the free...

this luminosity is not produced by the stars. Such excess, non-stellar emissions have been observed in the radio, microwave, infrared, optical, ultra-violet...

the "stimulating" photon, and is called stimulated emission. The rate at which stimulated emission occurs is proportional to the number of atoms N2 in...

Field-emission electric propulsion (FEEP) is an advanced electrostatic space propulsion concept, a form of ion thruster, that uses a liquid metal as a...

emission from any form of matter after the absorption of photons (electromagnetic radiation). It is one of many forms of luminescence (light emission)...

, photon emission by a relativistic particle), cyclotron radiation (i.e., photon emission by a non-relativistic particle), and the emission of electrons...

radio astronomy they are used to show the emission from synchrotron radiation, free-free emission and other emission mechanisms. In infrared astronomy, SEDs...

or hydroelectric) to be largely emission-free, or a fossil plant in which case they displace greenhouse gas emissions from the car tailpipe exhaust to...

unveiled on 1 August 2009 as the world's first mass market electric and zero-emission vehicle. Among other awards and recognition, it received the 2010 Green...

The Heavy Vehicle Emission Regulation 2019 (EU) 2019/1242 is an EU regulation that limits the toxic exhausts of lorries, trucks or other heavy vehicles...

inventories are emission inventories of greenhouse gas (GHG). Scientists use inventories of natural and anthropogenic (human-caused) GHG emissions as tools when...

Fugitive gas emissions are emissions of gas (typically natural gas, which contains methane) to atmosphere or groundwater which result from oil and gas...

This is a list of sovereign states and territories by greenhouse gas emissions due to certain forms of human activity, based on the EDGAR database created...

and particulates, and is a significant cause of climate change through emission of carbon dioxide. Within the transport sector, road transport is the largest...

The Thermal Emission Imaging System (THEMIS) is a camera on board the 2001 Mars Odyssey orbiter. It images Mars in the visible and infrared parts of the...

inorganic analysis. The phenomenon is related to pyrotechnics and atomic emission spectroscopy. The color of the flames is understood through the principles...

In Platonic physics and the emission theory of sight, an eye beam generated in the eye was thought to be responsible for the sense of sight. The concept...

sulfur emissions were natural, yet amounted for less than half of the emissions in the Southern Hemisphere. Such an increase in sulfate aerosol emissions had...

after that depends on future human greenhouse gas emissions. If there are very deep cuts in emissions, sea level rise would slow down between 2050 and...

Continuous emission monitoring systems (CEMS) are used as a tool to monitor the effluent gas streams resulting from combustion in industrial processes...

a process called secondary emission, a single electron can, when bombarded on secondary-emissive material, induce emission of roughly 1 to 3 electrons...

Be stars are a heterogeneous set of stars with B spectral types and emission lines. A narrower definition, sometimes referred to as classical Be stars...

Telecommunication Union. In physics, spectral bands refer to the electromagnetic emission of polyatomic systems, including condensed materials, large molecules,...

(BS6) emission NormsBharat stage emission standards in 2020. (2018–Present) Hero Splendor ISMART 110 (2nd Generation) (BS6) Bharat stage emission standards...

Emission Phase is the third full-length studio album by the band Detonation and was released by the French label Osmose Productions. The artwork was made...

Airglow is a faint emission of light by a planetary atmosphere. In the case of Earth's atmosphere, this optical phenomenon causes the night sky never to...

wildland fire atmospheric emissions have been a part of the global biosphere for millennia. The major wildland fire emissions include greenhouse gases...

2024, ExxonMobil was responsible for 610 Mt of CO2 emissions, which was 1.58% of global CO2 emissions. Originally, Vacuum Oil Company was founded in 1866...

address climate change and reach net zero emissions in New York State. The Act sets the goals to reduce emissions to 40% below 1990 levels by 2030 and then...

generation (10.2%), all of which involve fuel combustion. The types of emissions that contribute to particulate matter vary widely across countries and...

The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed...

airborne and spaceborne applications. HyTES: the Hyperspectral Thermal Emission Spectrometer operated by JPL and flown on a Twin Otter or ER2 aircraft...

for seminal emission. The term is generally used in Jewish law to refer specifically to the regulations and rituals concerning the emission of semen, whether...

over the possibility of "triggering" rapid energy releases, via gamma-ray emission, from 178m2Hf, a nuclear isomer of hafnium. The energy release per event...

each packet to arrive, δ, is the emission interval for cells at the PCR TPCR, and the emission interval, T, is the emission interval for the SCR TSCR. Where...

cavitation, and light emission. The thermal energy that is released from the bubble collapse is so great that it can cause weak light emission. The mechanism...

is the method used in determining the mass. Such methods, such as broad emission-line reverberation mapping (BLRM), Doppler measurements, velocity dispersion...

"Moessbauer", German: "Mößbauer") in 1958, consists of the nearly recoil-free emission and absorption of nuclear gamma rays in solids. The consequent nuclear...

is generally accompanied by decreasing peak emission heights of about 8 km for blue and green emissions and above-average solar wind speeds (c. 500 km/s)...

Greenhouse gas emissions by Russia are mostly from fossil gas, oil and coal. Russia emits between 2 billion tonnes or 3 billion tonnes carbon dioxide...

physics, is one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer...

Zero Emission Resource Organisation or ZERO is a Norwegian environmental organisation that was founded in 2002 to work on the reduction of greenhouse gases...

absorption is strongest. Emission is a process by which a substance releases energy in the form of electromagnetic radiation. Emission can occur at any frequency...

This Ultraviolet light exposure induced activation and subsequent light emission process can be repeated again and again. Nemoto & Co., Ltd. – a global...

less pH-sensitive than traditional dyes with comparable excitation and emission. The fluorophore absorbs light energy of a specific wavelength and re-emits...

annual emissions of industrial facilities in the Member States of the European Union (EU), as well as Norway. EPER collects data about the emissions of 12...

Gamma-ray burst emission mechanisms are theories that explain how the energy from a gamma-ray burst progenitor (regardless of the actual nature of the...

optical telescopes, such as the Maunakea Observatories, cannot. X-ray emission is expected from astronomical objects that contain extremely hot gases...

heterogeneous set of stars with unusual spectra showing prominent broad emission lines of ionised helium and highly ionised nitrogen or carbon. The spectra...

Fluorescence is one of two kinds of photoluminescence, the emission of light by a substance that has absorbed light or other electromagnetic radiation...

NOx produced by lightning per year is 8.6 million tonnes. However, NOx emissions resulting from fossil fuel combustion are estimated at 28.5 million tonnes...

been found to be capable of alpha emission are beryllium-8 and tellurium-104, not counting beta-delayed alpha emission of some lighter elements. The alpha...

It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with...

Emissions reduction can refer to: Climate change mitigation Air pollution control Certified emission reduction Emission reduction unit This disambiguation...

level. H-alpha has applications in astronomy where its emission can be observed from emission nebulae and from features in the Sun's atmosphere, including...

typically being black-body radiation and spectral band emission, with both spectral line emission and spectral line absorption playing smaller roles. In...

Stimulated emission depletion (STED) microscopy is one of the techniques that make up super-resolution microscopy. It creates super-resolution images by...

accounting help to lower emissions. Markets for buying and selling carbon credits depend on accurate measurement of emissions and emission reductions. These...

The Vehicles Emissions Regulation 2007 (EC) No 715/2007 is an EU Regulation that sets maximum levels of toxic emissions from motor vehicles. Since the...

proposed, including the emission of carbon dioxide from the burning of oil and coal deposits ignited by the eruptions; emissions of methane from the gasification...

Planetary nebulae are a type of emission nebula created from the ejected gas of dying red giant stars. The following is an incomplete list of known planetary...

in a color-color diagram and shared strong O I λ8449 emission. Since this Lyβ-pumped O I emission originates from a compact source, comparing its flux...

while the fields are much stronger at the tip of a sharp rod prior to any emissions, they decrease more rapidly with distance. As a result, at a few centimeters...

Compilation of Air Pollutant Emission Factors is a compilation of the US Environmental Protection Agency (EPA)'s emission factor information on air pollution...

The Magellanic Cloud Emission Line Survey (MCELS) is a joint project of Cerro Tololo Inter-American Observatory (Chile) and the University of Michigan...

spectrum of thermal emission from objects, but it fails to accurately fit the experimental data for long-wavelength (low-frequency) emission. Wien derived his...

type of radioligand that is used for the diagnostic purposes via positron emission tomography imaging technique. PET is a functional imaging technique that...

greenhouse gas emissions from croplands, some 30% of agricultural methane emissions, and 11% of agricultural nitrous oxide emissions. Methane is released...

Ballistic electron emission microscopy or BEEM is a technique for studying ballistic electron transport through a variety of materials and material interfaces...

greenhouse gas emissions in any other Annex I country (referred to as a "Joint Implementation Project") as an alternative to reducing emissions domestically...

photoconductive camera tubes charge-coupled imaging devices Stimulated emission, used in: injection laser diodes quantum cascade lasers Lossev effect,...

identified. In the late 19th century, scientists first argued that human emissions of greenhouse gases could change Earth's energy balance and climate. The...

with an impact comparable to that of CFCs. About 40% of human-caused emissions are from agriculture, as nitrogen fertilisers are digested into nitrous...

President Obama's environmental agenda prioritized the reduction of carbon emissions through the use of renewable energy with the goal of conserving the environment...

strong emission lines, with the absorption lines present but largely obscured by emission. This spectral transition from F supergiant to strong emission is...

detection events registered by the measuring instrument, not the rate of emission from the source of radiation. For radioactive decay measurements it must...

specific emission limit values and emission control measures. These mitigation actions have contributed to the reduction of heavy metal emissions between...

removed. In a general sense, there is no distinct boundary between the emission times of fluorescence and phosphorescence (i.e. if a substance glows under...

Low emissivity (low e or low thermal emissivity) refers to a surface condition that emits low levels of radiant thermal (heat) energy. All materials absorb...

vehicles from some car makers; the software recognized when the standardized emissions test was being done, and adjusted the engine to emit less pollutants during...

sub-cylinder directly behind the spark plug that leads into a smaller chamber for emission purposes. The first T engine displaced 1.4 L (1,407 cc) and was produced...

overlap of the donor emission spectrum and the acceptor absorption spectrum, and 3) the relative orientation of the donor emission dipole moment and the...

N11 (also known as LMC N11, LHA 120-N 11) is the brightest emission nebula in the north-west part of the Large Magellanic Cloud in the Dorado constellation...

consumption and emission figures. This information is made available through an online database containing the latest fuel consumption and emissions data for...

wavenumber or frequency) of the spectral band maxima of the absorption and emission spectra (fluorescence and Raman being two examples) of the same electronic...

powerful class of explosion in the Universe. These extreme electromagnetic emissions are second only to the Big Bang as the most energetic and luminous phenomena...

January) inclusive. In July 2013 the Ultra Low Emission Discount (ULED) introduced more stringent emission standards that limit the free access to the congestion...

quasars (FSRQ), with the former having weak or no emission lines and the latter showing strong emission lines. The generally accepted theory is that BL...

specific target timeframes such as ZEV mandates, national or regional CO2 emissions regulations, stringent fuel economy standards, and the phase-out of internal...

describes the intensities of vibronic transitions, or the absorption or emission of a photon. It states that when a molecule is undergoing an electronic...

retarded time is a wave emission time, which is a wave observation time subtracted by the wave propagation delay between the emission and the observation...

do not have well-defined boundaries. Types of diffuse nebulae include emission nebulae and reflection nebulae. Barnard's Loop Barnard's Merope Nebula...

In the United States, vehicle safety inspection and emissions inspection are governed by each state individually. Fourteen states have a periodic (annual...

the object increases in temperature to about 500 °C (773 K; 932 °F), the emission spectrum gets stronger and extends into the human visual range, and the...

comes exclusively from wind, solar, and low-impact hydro facilities. Less Emission is a subsidiary of Bullfrog "that works to limit the environmental impact...

The Carbon Emission Reduction Target (CERT) in the United Kingdom (formerly the Energy Efficiency Commitment) is a target imposed on the gas and electricity...

mechanics to solid-state problems, such as thermionic emission, work function of metals, field electron emission, rectification in metal-semiconductor contacts...

initiated either by thermionic emission or by field emission. After initiation, the arc relies on thermionic emission of electrons from the electrodes...

produced by a biological system. They are non-thermal in origin, and the emission of biophotons is technically a type of bioluminescence, though the term...

battery electric and hydrogen fuel cell buses, the second largest zero emission bus fleet in Europe (behind Moscow). In December 2005, London became one...

The Galactic Emission Mapping survey (GEM) is an international project with the goal of making a precise map of the electromagnetic spectrum of our galaxy...

means that no CO2 is produced, which eliminates the main greenhouse gas emission of a conventional petroleum engine. Pure hydrogen contains no carbon. Therefore...

engineer who played a major early role in developing the theory of thermionic emission, invented the screen-grid vacuum tube in 1915, co-invented the ribbon microphone...

positive. When this value is negative, the opposite process, two-photon emission, can occur. This follows from the same physics that describes single-photon...

A radio galaxy is a galaxy with giant regions of radio emission extending well beyond its visible structure. These energetic radio lobes are powered by...

can even appear red (because under these conditions nearly all incident emission is re-absorbed by the solution). It is on the World Health Organization's...

of electric field generation (DC or RF), by emission mechanism (thermionic, photocathode, cold emission, plasmas source), by focusing (pure electrostatic...

carbon emission-intensive industries. In 2020, the steelmaking industry was reported to be responsible for 7% of energy sector greenhouse gas emissions. The...

objects included here have been observed spectroscopically, but had only one emission line tentatively detected, and are therefore still considered candidates...

to distinguish the metastable half-life from the normal "prompt" gamma-emission half-life. The half-lives of a number of isomers are far longer than this...

estimating density functions in high-dimensional spaces such as in Positron emission tomography (PET). The first exploitation of Sieves in PET for solving the...

source is an object in outer space that emits strong radio waves. Radio emission comes from a wide variety of sources. Such objects are among the most extreme...

Safety and Emission Vehicle Inspection is responsible for ensuring that vehicles in North Carolina meet the safety and in some counties emissions standards...

relative to GDP than the world average. The country emits 7% of global emissions, despite having 17% of the world population. The climate change performance...

greenhouse gas emissions-reducing projects in other countries and claim the saved emissions as part of their own efforts to meet international emissions targets...

its own emissions, and the emissions of all the fossil fuels it sells, Shell was the ninth-largest corporate producer of greenhouse gas emissions in the...

or solid-state material that is responsible for its luminescence (light emission following excitation). In molecular photochemistry, the closely related...

emission after the mean lifetime τ n r {\displaystyle \tau _{nr}} , whereas in the former at least part of the energy is released by light emission or...

of resonant excited (isomeric) nuclear states for collective stimulated emission to occur turns on the broadening of the gamma-ray spectral line. Of the...

(NMHCs). Sometimes NMVOC is also used as a sum parameter for emissions, where all NMVOC emissions are added up per weight into one figure. In absence of more...

simply "the diesel ban". Another method of phase-out is the use of zero-emission zones in cities. Reasons for banning the further sale of fossil fuel vehicles...

to the atmosphere. Carbon footprints are usually reported in tonnes of emissions (CO2-equivalent) per unit of comparison. Such units can be, for example...

in 2008. With a clean diesel emission performance in mind, all engines are designed to comply with Tier 2 Bin 5 emission regulations in the United States...

same year, Cecil E. Hall also completed the construction of the first emission microscope in North America, just two years after being tasked by his supervisor...

missile (ARM) is a missile designed to detect and home in on an enemy radio emission source. Typically, these are designed for use against an enemy radar, although...

first time. The phenomenon of secondary emission (the ability of electrons in a vacuum tube to cause the emission of additional electrons by striking an...

Standard Act 2024 (NVES) is an Australian act of parliament that imposes emissions limits on vehicles. The law was implemented on 1 January 2025, with it...

Maxi-test brand testers offer precise measurements of transconductance/Gm and emissions/iP at full or near-full voltages, the Orange tester offers a very simple...

electron collection end. The bottom of the tether, point C, is the electron emission end. Similarly, V a n o d e {\displaystyle V_{\mathrm {anode} }} and V...

due to electron transitions from a lower to a higher energy state. The emission spectrum refers to the spectrum of radiation emitted by the compound due...

either photo-emissive (photoluminescent) or electro-emissive (electroluminescent) allowing them to be readily incorporated into new emissive display architectures...

ultra-low emissions vehicle (SULEV) is a U.S. classification for passenger vehicle emissions. The classification is based on producing 90% fewer emissions than...

The term blue dwarf refers to various types of stars having a peak emission in blue or ultraviolet. Those can be: A blue compact dwarf galaxy An early-type...

emission is often dimmer than that of more common phosphorescence at shorter wavelengths. For europium-dysprosium doped aluminates, the peak emission...

who investigated it in 1958. It involves the resonant and recoil-free emission and absorption of gamma radiation by atomic nuclei bound in a solid. Its...

2024, Gazprom was responsible for 1,065 Mt of CO2 emissions, which was 2.76% of global CO2 emissions. In 1943, during World War II, the government of the...

power, and the emission modes. This article lists the various frequencies allotted to various classes, and the corresponding emission modes and input...

Gallery in St. Paul's Cathedral in London. Researchers have found that the emission spectrum of a bubble laser is highly dependent on the bubble's environment;...

to strong yellow-gold emission (for neutral lipid in intracellular storages). The dye is highly solvatochromic and its emission and excitation wavelength...

predicts that event horizons emit Hawking radiation, with its rate of emission being inversely proportional to its mass. This causes the black hole to...

each of which deals with the regulation of a particular group of ship emissions. MARPOL Annex I came into force on 2 October 1983 and deals with the discharge...

(GCAP), formerly the Low Emissions Development Strategies Global Partnership (LEDS GP), aims to advance climate-resilient low emission development and support...

original (2003) generic term "hydrail" includes hydrogen trains, zero-emission multiple units, or ZEMUs—generic terms describing rail vehicles, large...

wind from the neutron star generates synchrotron emission, which produces the bulk of the emission from the nebula, seen from radio waves through to...

agriculture, in particular meat production, can cause pollution, greenhouse gas emissions, biodiversity loss, disease, and significant consumption of land, food...

an electron by secondary emission. In an arc discharge, electrons leave the cathode by thermionic emission and field emission, and the gas is ionized by...

emissivity—of black-body energy levels. By definition, a black body in thermal equilibrium has an emissivity ε = 1. A source with a lower emissivity,...

gases than in temperate regions. The following table indicates reservoir emissions in milligrams per square meter per day for different bodies of water....

the surface of a material. By directly measuring the kinetic energy and emission angle distributions of the emitted photoelectrons, the technique can map...

proposed to amend the 1963 Clean Air Act, a bill that aimed to reduce emissions of carbon dioxide (CO2). U.S. Senator, Bernie Sanders (I-VT), introduced...

coldest, and latest spectral type brown dwarf observed to produce radio emission (as of May 2026). WISE J0623−0456 was discovered in 2011 with the Wide-field...

Time-resolved photon emission (TRPE) is used to measure timing waveforms on semiconductor devices. TRPE measurements are performed on the back side of...

and heating mechanism that occurs during field and thermionic electron emission. The effect is named after physicist Wayne B. Nottingham who explained...

wavelength scale of a spectrum can be calibrated by observing the spectrum of emission lines of known wavelength from a gas-discharge lamp. The flux scale of...

exciton due to spontaneous emission leads to the emission of a single photon. Due to interactions between excitons, the emission when the quantum dot contains...

atomic structure allowing a unique set of peaks on its electromagnetic emission spectrum (which is the main principle of spectroscopy). The peak positions...

A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives...

system's spontaneous emission rate by its environment. In the 1940s Edward Mills Purcell discovered the enhancement of spontaneous emission rates of atoms when...

gas emissions, or 0.1% of global greenhouse gas emissions. It predicts the oil sands will grow to make up 8% of Canada's greenhouse gas emissions by 2015...

Kansas. He is known for developing the widely accepted model explaining the emission of X-rays from comets, a phenomenon discovered unexpectedly in 1996. Cravens...

the same emission. 2 Last Issued: refers to the year of last issue of the actual banknote from the same emission. In 1969, a second emission of the Zambian...

Positron emission tomography–magnetic resonance imaging (PET/MRI, PET–MRI, or PET/MR) is a hybrid imaging technology that incorporates magnetic resonance...

for 0 scale using 16.5mm track 0 emission, or Zero emission Zero Emissions Research and Initiatives Zero-emissions vehicle 0 energy or Zero energy zero...

reaction products can be directly converted into electrostatic energy); emission of very high energy photons, called gamma rays; some energy may remain...

Netherlands and was founded in 2003. Its vision was to demonstrate that zero emissions technology can be both fun and sustainable at the same time by racing...

process is also known as carbon removal, greenhouse gas removal or negative emissions. CDR is more and more often integrated into climate policy, as an element...

physiological imaging modality. Single photon emission computed tomography (SPECT) and positron emission tomography (PET) scans are the two most common...

this period to 70,000 years. This is the first comet to have an X-ray emission detected, which is most likely the result of ionised solar wind particles...

countries, quantify the resulting emission reductions, and allow Japan to use part of the reductions to meet its emission targets for 2020 and 2030. Unlike...

Particle-induced gamma-ray emission (PIGE) spectroscopy is a form of nuclear reaction analysis, one of the ion beam analysis thin-film analytical techniques...

Allowance for bad debts in accounting Carbon emission trading as an economic tool in climate change mitigation Emissions trading for pollutants in general All...

type of electron microscopy that utilizes local variations in electron emission to generate image contrast.[citation needed] The excitation is usually...

doughnut-shaped beam with a central intensity zero – to elicit photon emission from a fluorophore. The position of the excitation beam is controlled with...

global driving cycle standard for determining the levels of pollutants, CO2 emission standards and fuel consumption of conventional internal combustion engine...

Federal Act on the Reduction of CO2 Emissions (CO2 Act) is a Swiss federal law that regulates carbon dioxide emissions to mitigate climate change. The CO2...

rotational transitions of •HO, so it is difficult to detect far-infrared emission lines from a quiescent molecular cloud. Even at H2 densities of 106 cm−3...

Cardiac PET (or cardiac positron emission tomography) is a form of diagnostic imaging in which the presence of heart disease is evaluated using a PET scanner...

3C 293 also known as UGC 8782, is a low-ionization nuclear emission-line region (LINER) galaxy located in the constellation of Canes Venatici. The redshift...

be formed (dot-matrix displays). Colors can be generated by selective emission, by selective absorption, transmission or by selective reflection. Each...

Lyman-alpha blob (LAB) is a huge concentration of a gas emitting the Lyman-alpha emission line. LABs are some of the largest known individual objects in the Universe...

characteristic in early tetrode vacuum tubes, caused by a process called secondary emission. It was the first negative resistance vacuum tube oscillator. The dynatron...

of the School of Engineering. She is an active researcher of acoustic emission and her work has been applied to damage assessment inspections on industrial...

automotive parts manufacturer in the world and #1 for vehicle interiors and emission control technology. One in two automobiles is equipped by Forvia. It designs...

fuels causes serious environmental damage. Over 70% of the greenhouse gas emissions due to human activity in 2022 was carbon dioxide (CO2) released from burning...

A portable emissions measurement system (PEMS) is a vehicle emissions testing device that is small and light enough to be carried inside or moved with...

carbon dioxide emissions for energy use, as well as per capita and by area. The state with the highest total carbon dioxide emissions is Texas and the...

their emission intensity. Carbon intensity or emission intensity of GDP is a measure that evaluates the amount of carbon dioxide (CO2) emissions produced...

Neutron stimulated emission computed tomography (NSECT) uses induced gamma emission through neutron inelastic scattering to generate images of the spatial...

equipment, including fuel systems, air handling systems controls, filtration, emission control, electrical power generation systems, and engine control units...

charge for other vehicles. Compliance is defined according to European emissions standards, with the Birmingham scheme adopting class D of the A–D classification...

excess emission at wavelengths longer than 25 μm. Normally, this may be an indication of thermal emission by warm dust. In the case of M87, the emission can...

electrode which is heated to make it emit electrons due to thermionic emission. This is in contrast to a cold cathode, which does not have a heating element...

Government of British Columbia has enacted several goals to reduce carbon emissions, though these have been adjusted over time due to not being met. Investments...

the boundary beyond which atomic nuclei are unbound with respect to the emission of a proton or neutron. An arbitrary combination of protons and neutrons...

Kaya identity is a mathematical identity that disaggregates the total emission level of the greenhouse gas carbon dioxide so that it can be expressed...

reducing greenhouse gas emissions. As of 2022, compared to other ASEAN countries, Singapore has the second highest per capita CO2 emissions at 8.9 tonnes, and...

1 Pa and produced a near monochromatic light spectrum around the sodium emission lines at 589.0 and 589.6 nanometres wavelength. The yellow light produced...

Trump. Biden's climate change policy focused on reducing greenhouse gas emissions, similar to the efforts taken by the Obama administration. Biden also...

neuroimaging is used to study brain function, often using fMRI, positron emission tomography (PET), and magnetoencephalography (MEG). The early beginnings...

ever detected. However, it was not the most energetic: assuming isotropic emission, the total energy output of the burst was approximately 1054 ergs, placing...

Energy-dispersive X-ray spectroscopy, (EDX or EDXRF) PEEM, Photoelectron emission microscopy Mogk, David (13 August 2021). "X-Ray Photoelectron Spectroscopy...

type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such...

to predominate the black body emission spectrum. Before it had even reached the red hot temperature, the thermal emission was mainly at longer infrared...

its coherent radio emission". Zh. Eksp. Teor. Fiz. 41 (1961): 616–618. Askar'yan, G. A. (September 1965). "Coherent Radio Emission from Cosmic Showers...

carbon emission trading that aims to mitigate climate change by permanently removing emission allowances from circulation. In the European Union Emission Trading...

Madrid Central is a low-emission zone located in the center of Madrid. It was inaugurated on November 30, 2018. The project has been something of a political...

generated in the form of an emitted photon. This is spontaneous emission. Stimulated emission can be produced when the process is continued and further generates...

Greenhouse gas emissions from wetlands of concern consist primarily of methane and nitrous oxide emissions. Wetlands are the largest natural source of...

responsible for more CO2 emissions than any other entity, being responsible for 1,653 Mt CO2 emissions, or 4.28% of global CO2 emissions. Saudi Aramco's origins...

mixture into the engine for better acceleration. An air injection to new emission standards, including Euro1. The bike was launched as Hero Honda CBZ in...

quasar. It exhibits two sets of optical emission lines with different redshifts. The origin of the two emission line systems is believed to be a gravitational...

production of two or more photons. Positrons can be created by positron emission radioactive decay (through weak interactions), or by pair production from...

is able to trap and cool atoms over repeated absorption and spontaneous emission cycles with initial velocities of hundreds of meters per second down to...

Republiek Suriname) has a number of forms of transport. Transportation emissions are an increasing part of Suriname's contributions to climate change,...

Province, Turkey. Established in 2005, they now specialise in low- and zero-emission, battery and hybrid vessels for the world market. Cemre signed the first...

States of the European Union, collectively amounting to a 30% cut in emissions by 2030 (from a 2005 baseline). Its predecessor, the Effort Sharing Decision...

average fleet CO2 emissions (85 g/km) for new passenger cars three years earlier than pledged. The adoption and deployment of zero emission vehicles in Norway...

radiation for an optically-thin plasma are the emission in resonance lines of ionized metals (bound-bound emission); the radiative recombinations (free-bound...

is a list of locations and entities by greenhouse gas emissions, i.e. the greenhouse gas emissions from companies, activities, and countries on Earth which...

The Zero Emission Hyper Sonic Transport or ZEHST is a planned hypersonic passenger jet airliner project by the multinational aerospace conglomerate EADS...

solid-state physics, the Poole–Frenkel effect (also known as Frenkel–Poole emission) is a model describing the mechanism of trap-assisted electron transport...

The total greenhouse gas emissions of the People's Republic of China are the world's highest, accounting for 35% of the world's total, in 2023, according...

at which a laser's output is dominated by stimulated emission rather than by spontaneous emission. Below the threshold, the laser's output power rises...

The Center for the Advancement of Natural Discoveries using Light Emission, more commonly called the CANDLE Synchrotron Research Institute, is a research...

global greenhouse gas emissions. Direct greenhouse gas emissions include those from rice and livestock farming. Indirect emissions from the conversion of...

X-ray fluorescence (XRF) is the emission of characteristic "secondary" (or fluorescent) X-rays from a material that has been excited by being bombarded...

temperature increase is caused by absorption of ionizing UV and X-ray emission from the Sun. The air is so rarefied that an individual molecule (of oxygen...

emission restrictions or low emission zones. Converting the car to run on a different fuel (i.e., SVO, LPG, CNG, hydrogen, ...) may decrease emission...

or to a strong electric field. This is distinct from black body light emission resulting from heat (incandescence), illumination by light (photoluminescence)...

Hubble search for transition comets (Transition Comets—UV Search for OH Emissions in Asteroids) was a study involving amateur astronomers and the use of...

greenhouse gas emissions and climate-resilient development. Countries furthermore aim to reach "global peaking of greenhouse gas emissions as soon as possible...

are sometimes accompanied by circumstellar disks. Hydrogen and calcium emission lines are observed in their spectra.[citation needed] They are 2–8 Solar...

present in the vacuum are excluded in defining the work function. Thermionic emission In thermionic electron guns, the work function and temperature of the hot...

used in cell biology. Its excitation maximum lies at 401 nm, while its emission maximum is at 452 nm. In contrast to the less acidic 7-hydroxy-3-carboxycoumarin...

6×105 M☉. The ultraviolet emission of NGC 4636 exhibits O vi emission, which is a tracer of gas cooling. The measured emission indicates a cooling rate...

direct observation the radioactive source of the energy for visible light emissions, by detecting predicted gamma-ray line radiation from two of its abundant...

The floral volatile emission of this cultivar of G. globosa was found to exhibit a diurnal pattern independent of light. Emission of floral volatiles...

contributes to greenhouse gas emissions and climate change. Cars and vans caused 10% of energy-related carbon dioxide emissions in 2022. As of 2023[update]...

Guangdong Nuclear Power Company.[citation needed] To reduce the carbon dioxide emission in Hong Kong, new coal-fired power plants have not been allowed to be built...

Sh 2-43 also known as RCW 156, is an emission nebula located in the constellation of Sagittarius. It is a faint, diffuse region of ionized hydrogen gas...

environmental protection initiative. It is intended to minimize waste and emissions and maximize product output. By analysing the flow of materials and energy...

with a GWP-100 of 27.9 and a GWP-500 of 7.95. Greenhouse gas emissions (GHG emissions) can be expressed in terms of carbon dioxide equivalent mass or...

and 9.4 nm. These were chosen for temperature, instead of particular emission lines, as are many narrowband filters such as the H-alpha line mentioned...

tanks, polluting the Chehalis River, failing to report emissions, and failing to surrender emissions allowances. In both 2023 and 2024, it was the only entity...

conversion [fr]" (scrappage premium) require the new car to meet modern emission standards. The German scrappage incentive scheme and the British scrappage...

This in turn forms the basis for politically decided global and national emission targets for greenhouse gases, targets for fossil-free energy production...

The UK Emissions Trading Scheme (UK ETS) is the carbon emission trading scheme of the United Kingdom. It is cap and trade and came into operation on 1...

who received the 1928 Nobel Prize in Physics for his work on thermionic emission and for the discovery of Richardson's law. Owen Willans Richardson was...

cooling, forced air or water. A problem in early vacuum tubes was secondary emission; electrons striking the plate could knock other electrons out of the metal...

of emissions covered. Both EU and UK CBAM cover direct ('Scope 1') emissions. Regarding indirect ('Scope 2') emissions, the EU covers only emissions from...

mediators of neutrino absorption and emission. During these processes, the W±  boson charge induces electron or positron emission or absorption, thus causing nuclear...

shortest of radioisotopes with use outside research. It decays by positron emission 96.7% of the time and electron capture 3.3% of the time. Both modes of...

quantum-mechanical system during measurement. A quantum jump can be accompanied by the emission or absorption of photons; energy transfer during a quantum jump can also...

employs relativistic electrons as a gain medium instead of using stimulated emission from atomic or molecular excitations. In an FEL, a bunch of electrons passes...

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a Japanese remote sensing instrument onboard the Terra satellite launched...

in cool stars is a strong photospheric absorption line that exhibits an emission line at its core originating in the star's chromosphere. In 1957, Olin...

engineering, a prompt neutron is a neutron immediately emitted (neutron emission) by a nuclear fission event, as opposed to a delayed neutron decay which...

an additional multiplex advantage for emission lines of atomic and molecular spectra. At the peak of the emission line, a monochromator measurement will...

structures in the galaxy. The galaxy is best observed during April. Most of the emission at infrared wavelengths originates from interstellar dust. This interstellar...

as it was based on a fee structure according to the vehicle's engine emission standards, and to use the funds raised through the charge to finance public...

the emission is observed either at a single wavelength, or a scan is performed to record the intensity versus wavelength, also called an emission spectrum...

lens, and allow the emission beam to pass through into the detector. Additional filtering may be required to further separate emission and excitation wavelengths...

IC 1396 is a large emission nebulae, a region of ionized gas, located in the constellation Cepheus about 2,400 light years away from Earth. IC 1396 is...

on Io, producing about 10% of Io's total thermal emission. Temperature measurements of thermal emission at Loki Patera taken by Voyager 1's Infrared Interferometer...

diesel-electric locomotives that meet or exceed EPA Tier 2 locomotive emissions regulations, sorted by builder. This is a non-exhaustive list of locomotives...

for most He-Ne lasers. However, other visible and infrared stimulated-emission wavelengths are possible, and by using mirror coatings with their peak...

Sh 2-18 is an emission nebula in the constellation Sagittarius. It is part of the Sharpless Catalog assembled by Stewart Sharpless. It lies next to Sh...

drop back into the valence band releasing its energy as light. This light emission (photoluminescence) is illustrated in the figure on the right. The color...

radiation and the spectral radiance of a body, Bν, describes the spectral emissive power per unit area, per unit solid angle and per unit frequency for particular...

who reduce their green house gas (GHG) emissions by a real and verifiable amount. Individuals cause GHG emissions from a variety of direct and indirect...

The Kędzierzyn Zero-Emission Power and Chemical Complex was a proposed facility in Kędzierzyn-Koźle, Poland. It was planned to combine the functions of...

The Miniature Thermal Emission Spectrometer (Mini-TES) is an infrared spectrometer used for detecting the composition of a material (typically rocks) from...

outdoor air, and the National Emissions Standards for Hazardous Air Pollutants program which sets standards for emissions of particular hazardous pollutants...

excitation–emission spectra. Both dyes are excited by ultraviolet light at around 350 nm, and both emit blue-cyan fluorescent light around an emission spectrum...

broadened its scope in 2008 to include other alternative, low- and zero-emission fuels for transport. Along with partners Hydrogen Denmark Hydrogen Sweden...

Kentucky. 2006 CO2 Emissions: 1,186,544 tons 2006 SO2 Emissions: 2006 SO2 Emissions per MWh: 2006 NOx Emissions: 2005 Mercury Emissions: United States portal...

Sh 2-58 (also known as LBN 79) is an emission nebula visible in the constellation of Scutum. Located in the western part of the constellation, about 1°...

greenhouse gas emissions are over 1% of the global total, and energy policy includes subsidizing both fossil gas and coal. Annual per person emissions since the...

surface, an effect called thermionic emission. This technique is used in most vacuum tubes. Field electron emission: A strong electric field can be applied...

eucalyptus, phytoplankton, and some legumes). Yearly production of isoprene emissions by vegetation is around 600 million metric tons, half from tropical broadleaf...

raised ratio of energy emission to energy absorption of the area, leading to less thawing of permafrost and thereby less emission of greenhouse gases. It...

form of a bath of electromagnetic radiation that can cause spontaneous emission and absorption). It was originally developed to study the interaction of...

by a prism-like instrument displays either an absorption spectrum or an emission spectrum depending upon whether the element is being cooled or heated....

was thought that neutron stars would be difficult to detect due to low emissions. However, it was discovered that spinning stars emit radiation. Most neutron...

Wreath Nebula (also known as Barnard 3 or IRAS Ring G159.6-18.5 is an emission nebula and H II region with a radius of about 22 light-years, located about...

quantitative measures for clinical response assessment using Positron emission tomography (PET) supervised by Jamal Zweit [Wikidata]. Since completing...

voluntary, legally binding greenhouse gas reduction and trading system for emission sources and offset projects in North America and Brazil. CCX employed independent...

with a separation of around 4500 AU. WISE J1122+25 was detected in radio emission with the Arecibo radio telescope and the Very Large Array (VLA). WISE J1122+25...

there is no feedback from the resonator. Since the rate of stimulated emission is dependent on the amount of light entering the medium, the amount of...

standardisation of emission of greenhouse gases in order that corporate entities should measure, quantify, and report their own emission levels, so that...

reliance on the low-probability forbidden mechanism, again results in light emission (slow component). In the case of inorganic scintillators, the activator...

The neutron turns into a proton through the emission of a virtual W− boson. At the quark level, W− emission turns a down quark into an up quark, turning...

September 2015 had an emissions defeat device, which activated emissions controls only during emissions testing. The emissions controls were suppressed...

atomic line filters are absorption-re-emission ALFs, Faraday filters and Voigt filters. Absorption-re-emission filters were the first type developed,...

Environment estimated that New Zealand's gross emissions were 0.17% of the world's total gross greenhouse gas emissions. However, on a per capita basis, New Zealand...

plant itself. CO2 Emissions: 438,984 tons (2005) SO2 Emissions: 9,280 tons (2005) SO2 Emissions per MWh: 60.37 lb/MWh NOx Emissions: 1,097 tons (2005)...

vehicles built with emission control technology. This technology was installed so that vehicles would comply with Japanese emission regulations passed...

is a rectilinear valve used to control the admission of steam into and emission of exhaust from the cylinder of a steam engine. In the 19th century, most...

gas emissions to net-zero by 2050. BP is seeking net-zero carbon emissions across its operations and the fuels the company sells, including emissions from...

line emission from hydrogen detected by radio telescopes, although atomic hydrogen in the cold neutral medium also contributes, both in emission and by...

announced that it would only purchase zero-emission buses from 2029, and that the entire bus fleet will be zero-emission by 2040. A roster of the fleet is shown...

14.696 psia. AP 42 Compilation of Air Pollutant Emission Factors Carbon capture and storage Emission standard Exhaust gas Flue gas stacks Flue gas to...

Sh 2-21 is an emission nebula in the constellation Sagittarius. It is part of the Sharpless Catalog assembled by Stewart Sharpless. It is associated with...

Miller in 1975, and is among the nearest and brightest BL Lacs. Optical jet emission from 3C 371 was first detected in ground-based images by Nilsson et al...

the world. Chinese plans to abide by carbon emission reduction goals involves peaking greenhouse gas emissions before 2030, and achieving carbon neutrality...

energy levels Grotrian studied the emission line from the solar corona in the green region of the spectrum; this emission line could not be attributed to...

OTELO (OSIRIS Tunable Emission Line Object survey) is an emission line object survey using OSIRIS tunable filters in selected atmospheric windows relatively...

unique position on the phasor plot which depends on its spectral width or emission maximum or to its average lifetime. Importantly, the analysis is fast and...

gases. The cleanest engines emit only water. Strict zero-emissions generally means zero emissions other than water and water vapour. Only heat engines which...

happened in the 1960s; it was set on fire only in the 1980s to prevent the emission of poisonous gases. Others assert that the site was drilled by Soviet engineers...

electronics, field electron emission, thermionics, photoelectrics and low pressure equipment. The Nottingham effect in field electron emission is named after him...

Ae The following example shows the decay of 223 88Ra into 209 82Pb by emission of a 14 6C cluster: 223 88Ra → 14 6C + 209 82Pb The energy released in...

NGC 5455 is an emission nebula (HII region) located in Messier 101 (the Pinwheel Galaxy) towards the constellation Ursa Major. Eight other regions of Messier...

inspired styling, among others. In 2020, TVS launched Ntorq 125 with BS-VI emission standard. The new TVS Ntorq 125 comes in eight colour options and three...

SEVENDIP, which stands for Search for Extraterrestrial Visible Emissions from Nearby Developed Intelligent Populations, was a project developed by the...

The Zero Emissions Buses Program is a multi-billion dollar program initiated by the New South Wales Government of Australia that is planned to phase out...

Sh 2-15 is an emission nebula in the constellation of Scorpius. It is ionized by the star HD 161853. It is most visible using a Hydrogen-alpha filter....

2O, and SiO masers emission, which is typical of an OH/IR supergiant star. It also shows an unusual spectrum of nebular emission; the hot gas is rich...

South Korea's Emissions Trading Scheme (KETS) is the second largest in scale after the European Union Emission Trading Scheme and was launched on January...

Ultra-low-emission vehicles are not charged when entering or moving through a Clean Air Zone. Greater London has a Low Emission Zone and an Ultra Low Emission Zone...

various environments and industries, including agriculture. The state's emissions amounted to 76.23 million tonnes in 2005 compared to 82.64 million tonnes...

low-emission 215 bhp (160 kW; 218 PS) five-cylinder PZEV engine features an Integrated Starter-Generator (ISG), "[complying] with the toughest emission standards...

magnetospheric emission. Pulsed X-rays match the radio period, with a hard spectrum (photon index Γ ≈ 1.4) in the compact nebula. No pulsed gamma-ray emission has...

stellar objects that produce copious emissions of various radio frequencies, whether constant or pulsed. Radio emissions from stars can be produced in many...

process is the physical phenomenon relied on as the basis of positron emission tomography (PET) and positron annihilation spectroscopy (PAS). It is also...

2006 CO2 Emissions: 4,671,336 tons 2006 SO2 Emissions: 3,947 tons 2006 SO2 Emissions per MWh: 2006 NOx Emissions: 5,400 tons 2005 Mercury Emissions: 86 lb...

Jablonski diagram. Radiative transitions involve either the absorption or emission of a photon. As mentioned above, these transitions are denoted with solid...

the different positions of emission lines in the photometric bands. BBs at redshift z < 0.05 have the [O III] λ5007 emission line within the g band, which...

Sonoluminescence is luminescence induced by sound waves, such as in the emission of light from imploding bubbles in a liquid when excited by sound. Sonoluminescence...

study dark energy, and FIREBall (Faint Intergalactic medium Redshifted Emission Balloon), the world's first fiber fed ultraviolet spectrograph. Tuttle...

lifetime. The four heaviest known isotopes (up to 28 O) decay by neutron emission to 24 O, whose half-life is 77 milliseconds; 24O, along with 28Ne, have...

doubly ionized oxygen is the ion O2+ (O III in spectroscopic notation). Its emission of forbidden lines in the visible spectrum fall primarily at the wavelength...

concept to quantify an increase in greenhouse gas emissions in one country as a result of an emissions reduction by a second country with stricter climate...

diesel engine emissions were not regulated until 1987 when the first California Heavy Truck rule was introduced capping particulate emissions at 0.60 g/BHP...

for energy and related products, including power derivative contracts, emission allowances, agricultural and freight products. The EEX emerged as a result...

Industrial Emissions Directive (IED) (Directive 2010/75/EU of the European Parliament and of the Council of 24 November 2010 on industrial emissions (integrated...

filter (DPF), allowing all engine variants to comply with Euro IV European emission standards. The 2010 version of the 2.5 TDI CR engine was redesigned, correcting...

R&D GREET (Research and Development Greenhouse gases, Regulated Emissions, and Energy use in Technologies) is a full life cycle model developed by the...

the second largest exchange in European Union emission allowances (EUAs) and global certified emission reductions (CERs) trading. In 1991 the Parliament...