News tagged with field emission
Astronomers detect coolest radio star
(Phys.org) -- Astronomers using the world's largest radio telescope, at Arecibo, Puerto Rico, have discovered flaring radio emission from an ultra-cool star, not much warmer than the planet Jupiter, shattering the previous ...
Apr 18, 2012 |
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Transforming galaxies
(PhysOrg.com) -- Many of the Universe's galaxies are like our own, displaying beautiful spiral arms wrapping around a bright nucleus. Examples in this stunning image, taken with the Wide Field Camera 3 on ...
Feb 13, 2012 |
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Radio stars: Caltech's astronomy professor searches for cosmic radio waves
Growing up in rural northwest Ireland, beyond the reach of city lights, Gregg Hallinan fell in love with the night sky. "When you didn't have bad weather, and you didn't have clouds, the skies were nothing ...
Feb 03, 2012 |
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When it comes to churning out electrons, metal glass beats plastics
By adding carbon nanotubes to a glass-like metal compound, researchers have devised a new breed of field emission electrodes. This technology, which produces a stream of electrons, may have promising applications in the consumer ...
Nov 21, 2011 |
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An atlas of the Milky Way
Sino-German research group draws a new map at the Urumqi radio telescope and discovers two supernova remnants.
Aug 30, 2011 |
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Soil microbes accelerate global warming
More carbon dioxide in the atmosphere causes soil to release the potent greenhouse gases methane and nitrous oxide, new research published in this week's edition of Nature reveals. "This feedback to our changing atmosphere means ...
Jul 13, 2011 |
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FDA clears Siemens' 2-in-1 medical scanner
(AP) -- The Food and Drug Administration says it has cleared the first medical imaging device to simultaneously perform two powerful scans used to diagnose a wide variety of diseases and ailments.
Medicine & Health / Medications
Jun 10, 2011 |
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Global warming may affect the capacity of trees to store carbon, study finds
One helpful action anyone can take in response to global warming is to plant trees and preserve forests. Trees and plants capture carbon dioxide during photosynthesis, thereby removing the most abundant greenhouse ...
May 25, 2011 |
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Manure runoff depends on soil texture
Research has documented the rise of nutrient runoff from flat agricultural fields with high rates of precipitation that adds nitrates and phosphates to waterways.
Mar 29, 2011 |
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Cluster collisions switch on radio halos
(PhysOrg.com) -- This is a composite image of the northern part of the galaxy cluster Abell 1758, located about 3.2 billion light years from Earth, showing the effects of a collision between two smaller galaxy ...
Aug 30, 2010 |
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Image: Black Hole Blows Big Bubble
This composite image shows a powerful microquasar produced by a black hole in the outskirts of the nearby (12.7 million light years) galaxy NGC 7793. The large image contains data from the Chandra X-ray Observatory ...
Space & Earth / Space Exploration
Jul 12, 2010 |
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Scientists Explore the Mystery of Active Region Outflows
(PhysOrg.com) -- The Japanese Hinode spacecraft that launched in September 2006 contains the Extreme-ultraviolet Imaging Spectrometer (EIS), which provides measurements of properties of the solar corona such ...
Space & Earth / Space Exploration
Jun 25, 2010 |
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Conical nanocarbon structures could lead to flexible, transparent field emission displays
(PhysOrg.com) -- During the past several years, researchers have used carbon nanotubes and nanofibers to fabricate a variety of transparent, flexible devices, such as OLEDs, transistors, and solar cells. But ...
Nanotechnology / Nanomaterials
Mar 25, 2010 |
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X-Ray Emission from Young Stars
(PhysOrg.com) -- The star TW Hydrae is located about 150 light-years from earth in the direction of the constellation of Hydrae, the Water Snake. This star is relatively young -- at about 10 million years ...
Feb 05, 2010 |
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Studying Fertilizers to Cut Greenhouse Gases
(PhysOrg.com) -- Agricultural Research Service (ARS) scientists have found that using alternative types of fertilizers can cut back on greenhouse gas emissions, at least in one part of the country. They are ...
Nov 18, 2009 |
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