Sentences with phrase «radiation emission of»

A parametric study was undertaken to examine the effects of scattering on the combined reflection and thermal radiation emission of a typical semitransparent thermal barrier coating material.

Not exact matches

This simply entails blocking the emission of laser «radiation» to avoid harming the gunman.

It's this superfast superheating of the iron that causes the emission of X-ray radiation.

Some observers quietly worry that, under Trump, a new focus on climate engineering could become part of a justification for delaying government action to curb carbon emissions, with the reasoning that geoengineering technologies could later be used to remove carbon from the atmosphere, or prevent the warming effects of solar radiation.

Astronomers long considered two other main candidates in addition to synchrotron radiation: black - body radiation, which results from the emission of heat from an object, and inverse Compton radiation, which results when an accelerated particle transfers energy to a photon.

«Synchrotron radiation is the only emission mechanism that can create the same degree of polarization and the same spectrum we observed early in the burst,» Troja said.

The idea that massive stars will have a considerable effect on their surroundings is not new: such stars are known to blast out vast quantities of powerful, ionising radiation — emission with enough energy to strip atoms of their orbiting electrons.

NGC 2035 is an HII region, or emission nebula, consisting of clouds of gas that glow due to the energetic radiation given off by young stars.

- The giant radio telescopes of NASA's Deep Space Network — which perform radio and radar astronomy research in addition to their communications functions — were tasked with observing radio emissions from Jupiter's radiation belt, looking for disturbances caused by comet dust.

«Because 85 percent of people in the study reported extending the antenna during calls, we might have expected to find a disproportionate cluster of tumors behind the eye and the ear on the side the cell phone was used since radiation emission is highest at the antenna,» says co-author Mark Malkin, a neuro - oncologist at Memorial Sloan - Kettering Cancer Center.

Many suspect crops in industrialized Western countries have been getting more light since the 1980s thanks to clean air regulations that brought down emissions of aerosols, which scatter and absorb solar radiation.

The major result of Mass. v. EPA «is that business will go and try to make a deal with Congress regarding federal regulations on greenhouse gas emissions,» says Mary Nichols, director of the Institute of the Environment at the University of California, Los Angeles, and former EPA assistant administrator of air and radiation.

Late in 1916, despite the exhaustion of just having completed his grand papers on general relativity, Einstein told his close friend Michele Besso that «a splendid light has dawned on me about the absorption and emission of radiation.»

Light amplification by stimulated emission of radiation to the rescue.

The greenhouse effect is the process in which the emission of infrared radiation by the atmosphere warms a planet's surface.

«It's important to note that the article doesn't address the direct and immediate impact of forest burning, such as emissions of black carbon [considered a major driver of global warming owing to its high capacity for absorbing solar radiation].

Sky surveys and mappings of the various wavelength bands of electromagnetic radiation (in particular 21 - cm emission) have yielded much information on the content and character of the universe's structure.

(A becquerel measures the rate of radiation emission.)

So thirsty are theorists for new insights into black holes and relativistic processes that, with each LIGO detection, observational astronomers have leapt into action to target those enormous patches of sky, hoping to see some afterglow or other emission of electromagnetic radiation — even though by definition the resulting larger black hole should emit no light.

Typically, lasers require a much larger cavity that allows light to bounce back and forth between mirrors for it to become amplified into a laser (light amplification by stimulated emission of radiation).

Utilizing the X-ray fluorescence method in their studies, the researchers took advantage of the fact that X-rays can excite chemical elements into fluorescence, a short - term radiation emission.

However, rather than emitting violent bursts of gamma - ray radiation, like blazars, Seyfert galaxies are known for their strong ultra-violet emissions.

Our bodies naturally release heat, in part, through emission of mid-infrared radiation in the 7 - to 14 - µm wavelength range.

«The currently available evidence indicates that the potential risks to public health from exposure to emissions associated with the shale gas extraction process are low if operations are properly run and regulated,» said John Harrison, director of PHE's center for radiation, chemical and environmental hazards.

Townes» appointment as director of research for the U.S. government's Institute of Defense Analysis in 1959 slowed his efforts to build an optical device, opening the door for Theodore Maiman to demonstrate the first laser — light amplification by stimulated emission of radiation — in 1960.

It was not until the 1950s that the theory of synchrotron radiation was developed that explained the type of emission that came from the Milky Way.

Schlegel, D. J., Finkbeiner, D. P. & Davis, M. Maps of dust infrared emission for use in estimation of reddening and cosmic microwave background radiation foregrounds.

City of Hope is a leader in image - driven radiation planning, using advanced imaging technologies — such as computed tomography, magnetic resonance imaging and positron emission tomography scans — to determine tumor size and location and «sculpt» radiation delivery to the cancerous areas.

The Space Science Laboratory (as part of the wider Solar Physics and Space Plasma Research Centre (SP2RC) at The University of Sheffield) was recently awarded the STFC grant «Dynamics of key radiation belt emissions» (April 2018 to March 2021) and the successful applicant would have the opportunity to contribute to this active research project (depending on the topic of PhD chosen).

It's not totally about how much infrared from the surface that is blocked (currently about 90 % of surface emissions is absorbed by greenhouse gases), its also about the height within the atmosphere from which radiation escapes.

The search for galactic emissions of radiation which could signal the presence of advanced alien civilizations has failed to find any, researchers say.

Spectroscopy: The study of the interaction between electromagnetic radiation and matter, with absorption or emission of radiant energy.

Blais is accustomed to covering space in his music by now — his recent piece on cosmic background radiation, to the tune of Circle of Life, lays down the science behind the search for evidence of cosmic inflation and gravitational waves in space's emissions.

They release radio energy in a nearly flat spectrum because of the emission of radiation by charged particles moving spirally at nearly the speed of light in a magnetic field enmeshed in the gaseous remnant.

A brown dwarf is more like a star, producing some kind of stellar wind emissions, though that's probably much less energetic than the radiation belts of Jupiter.

Even though most of the visible radiation is concentrated in a few discrete emission lines, the total apparent brightness of the brightest is the equivalent of tens of thousands of solar luminosities.

Hydrogen emission from EGSY8p7 may indicate it is the first known example of an early generation of young galaxies emitting unusually strong radiation.

Another type of device, the maser (acronym for «microwave amplification by stimulated emission of radiation») has proved useful in such areas as radio astronomy, microwave radiometry, and long - distance communications.

His MSc thesis (1987) dealt with the description and application of a system for calculating radiation doses due to long range transport of radioactive releases and his Licentiates's thesis (1998) studied the effective choice of NOx - emission control measures.

In doing so, as the CMB photons traveled through this hydrogen gas, it absorbed a particular frequency — so rather than look for a specific emission, astronomers have been looking for a specific type of absorption, or a certain frequency of CMB radiation that was missing.

Massive yet non-supergiant entities known as «Be stars» are main - sequence stars that notably have, or had at some time, one or more Balmer lines in emission, with the hydrogen - related electromagnetic radiation series projected out by the stars being of particular interest.

However, even when many dark celestial bodies emit radiation, the emission may be observed just as «cosmic background» radiation if the sensitivity and resolution of the telescope in use is insufficient.

The light emission from such radiation detector materials could provide a signature for the type of radioactive material present.

Like the main nebula M42, this is an emission nebula, shining by the light emitted from its atoms, after being excited by the high - energy radiation of massive, very hot young stars within it.

These changes might influence interactions between the ocean and the atmosphere such as the air - sea gas exchange and the emission of sea - spray aerosols that can scatter solar radiation or contribute to the formation of clouds.

It should be pointed out here, that the amount of change in downward heat radiation from changes in cloud cover in the experiment, are far greater than the gradual change in warming provided by human greenhouse gas emissions, but the relationship was nevertheless established.

Hours earlier, Gregory Jaczko, the head of the U.S. Nuclear Regulatory Commission, told Congress that spent fuel rods in Unit 4 of the plant had been exposed, resulting in the emission of «extremely high» levels of radiation.

Part of the emission from the centre of Messier 106 is produced by a process that is somewhat similar to that in a laser — although here the process produces bright microwave radiation.

Composed primarily of hydrogen, much of it ionized (heated or energized) by radiation from the nearby superstar Herschel 36, M8 is known as an emission nebula.

The cosmic microwave background radiation is an emission of uniform, black body thermal energy coming from all parts of the sky.