Sentences with phrase «of radiation sources»

Not exact matches

K - alpha and bremsstrahlung x-ray radiation backlighter sources from short pulse laser driven silver targets as a function of laser pre-pulse energy

We live in such a high - tech world and kids are exposed to so much now that I don't want my baby monitor to be another source of potential radiation risk.

Frackopoly describes how the fracking industry began; the technologies that make it possible; and the destruction and poisoning of clean water sources and the release of harmful radiation from deep inside shale deposits, creating what the author calls «sacrifice zones» across the American landscape.

The AAD also advises the public to steer clear of tanning beds, a source of artificial UV radiation that increases the risk of melanoma, especially in women 45 and younger.

Ultraviolet radiation from the sun and artificial sources is the most preventable risk factor for all forms of skin cancer, including melanoma.

Radionuclide levels in fish off Fukushima are highly variable but remain elevated, indicating a continuing source of radiation.

«Measurements of the extragalactic background radiation are always hard to get, because this signal is very faint and, as a result, its detection is strongly dependent on how well one can remove the sources of contamination,» says Angelica De Oliveira - Costa, an expert on cosmic background observations at the Massachusetts Institute of Technology.

«The first two sources of X radiation outside our galaxy have been discovered in data obtained a year ago by means of rocket - borne X-ray detectors.

Incredible as it may seem, heat radiation is the greatest source of uncertainty when projecting which asteroids could hit Earth in the far future.

The major source of radiation exposure from air travel comes from the flight itself.

During the contraction a wave blast revealed by extreme ultraviolet radiation spreads away from the source of the flare.

To put these numbers in perspective, the average person encounters 360 millirems of annual «background radiation» from natural and man - made sources, including substances in Earth's crust, cosmic rays, residue from nuclear tests and smoke detectors.

The country's newest space lab, Tiangong - 2, for example, hosts a number of scientific payloads, including an advanced atomic clock and a $ 3.4 - million detector called POLAR for the study of γ - ray bursts — blasts of high - energy radiation from collapsing stars and other sources.

AMANDA receivers are sunk as deep as 1.5 kilometers into antarctic ice to filter out all sources of radiation but neutrinos.

Its ability to ionise air made it easy to detect and led to a surprising discovery: even when no radioactive source was present, detectors revealed the presence of some other radiation that was ionising the air.

Taking into account natural background radiation, medical procedures and other sources, people in the U.S. encounter an average of about 6.5 millisieverts per year.

In addition, the current in the receiving antenna is itself a secondary source of radiation.

Instead they showed an increase in energy that started right in the middle of the radiation belts and gradually spread both inward and outward, implying a local acceleration source.

Among other sources of such radiation, scientists have proposed that interactions between bits of dark matter (which make up a large fraction of the universe's mass but haven't yet been directly detected) in a halo around the galactic center may be creating the surplus gamma rays.

The researchers took care to rule out the possibility of other sources such as black body radiation and surface polarization as reasons behind the production of visible light.

Once independent, the Daresbury and Rutherford Appleton Laboratory will be expected to pay its own way, charging «customers» in the research councils and industry for use of its powerful radiation sources.

These Ne - Kr clusters were then exposed to pulsed X-rays of the SPring - 8 synchrotron radiation source which, under the conditions chosen for the experiment, preferentially ionized Ne atoms.

When illuminated by a source of radiation, the material behaved as though it were naturally magnetic.

Tobiska says the two main sources of radiation, cosmic rays and the solar wind, can't account for the surges.

Herschel 36 is the main source of ionising radiation for this part of the Lagoon Nebula.

The researchers tested the structure by placing it in a chamber of water and exposing it to a solar simulator — a light source that simulates various intensities of solar radiation.

Few foods are natural sources of vitamin D, which is more abundantly produced when ultraviolet radiation from sunlight strikes the skin and triggers synthesis.

Water sourced from the low - gravity moon, Schmitt explained, could be utilized as a protective, radiation - thwarting cocoon, built into the superstructures of Mars - bound crewed spacecraft.

These insights into fundamental physics will particularly profit further research into new radiation sources and in the field of light wave electronics.

All these accessories, plus a model rifle, were tagged with retroreflectors, which can reflect a beam of radiation back to its source regardless of the angle of incidence.

Yet there is no doubt that research into atmospheric aerosols is becoming increasingly important due to the effects that they can have on the global temperature of Earth, given that solar radiation is the main source of energy for Earth - Atmosphere system.

To see these quantum effects of gravitational radiation, researchers would have to suppress every other source of decoherence, he says.

At present, radiation caused by cosmic rays is one of the largest sources of natural radiation exposure.

Rejecting the university's plea to continue using radioactive sources in its labs, AERB Chairman Shri S. S. Bajaj told the Press Trust of India that «Delhi University had sought more time from AERB but the Board's Standing Committee, that reviews unusual occurrences at radiation facilities, has decided not to extend the time and withdrawn the authorization to use radioactive source in its laboratories.»

Black holes can not be observed directly, but they are the energy source at the heart of quasars — intense, compact gushers of radiation that can outshine an entire galaxy.

The next biggest external source of radiation is, well, pretty much everything around us, contributing about 28 millirems per year.

It consists of a magnet, a source of (harmless) microwave radiation, and a device that senses the reflected microwaves.

All of the above are external sources of radiation, but 40 millirems of our annual dose is internal, generated from the decay of isotopes incorporated into the molecules of our being: a potassium - 40 atom in the brain firing off a gamma ray here, a carbon - 14 atom in the liver spitting out a beta particle there.

But the high - energy radiation from the source has shown no sign of dying down, which suggests that astronomers may have caught a star in the process of being ripped to shreds by a black hole.

The problem with studying the effects of this fallout is that the world is bathed with naturally occurring low - level radiation, with sources ranging from long - distance air travel to plasma televisions.

It is also possible that some gene and local species tree incongruence could reflect ancient hybridization during the radiation, but distinguishing between this and other sources of hemiplasy (83) would require more complete assemblies, genes without missing data across species, and development of new methods (84).

«In the history of synchrotron radiation research, which is only about 45 years old, you can count the true breakthroughs on the fingers of one hand,» says David Moncton, Argonne's Associate Laboratory Director for the Advanced Photon Source.

Combining these two elements to make a compact frequency comb generating long - wavelength light in the terahertz range can produce a useful source of radiation for a variety of applications in imaging, diagnostics, remote sensing, and identifying molecular «fingerprints» of extremely complex molecules.

The United States Department of Health and Human Services proclaimed in 2002 that ultraviolet (UV) radiation from the sun and artificial sources, such as tanning beds and sun lamps, is a known carcinogen.

The map, published online in the journal Scientific Reports on September 1, 2015, provides an important baseline image of the energy budget of Earth's interior and could help scientists monitor new and existing human - made sources of radiation.

There, shielded from most sources of contaminating radiation, researchers have spent more than a year's worth of time looking for flashes of light emanating from WIMPs striking xenon nuclei.

This model describes three types of forces: electromagnetic interactions, which cause all phenomena associated with electric and magnetic fields and the spectrum of electromagnetic radiation; strong interactions, which bind atomic nuclei; and the weak nuclear force, which governs beta decay — a form of natural radioactivity — and hydrogen fusion, the source of the sun's energy.

They then looked at another source of data: that of the Clouds» and Earth's Radiant Energy System (CERES) satellite instruments which measure fluxes of reflected and emitted radiation from Earth to space, to help scientists understand how the climate varies over time.

Second, they put the flask of acetone next to a source of neutron radiation, in one case a chunk of plutonium - beryllium and in other cases a neutron pulse gun.

Doctors also used chemicals and radiation to obliterate his bone marrow, the source of all his blood cells — a crude but effective strategy to destroy any cancerous ones that survived chemotherapy.