Running along the border between the constellations of Canis Major (The Great Dog) and Monoceros (The Unicorn) in the southern sky, the Seagull Nebula is a huge cloud mostly made of hydrogen gas. It's an example of what astronomers refer to as an HII region. Hot new stars form within these clouds and their intense ultraviolet radiation causes the surrounding gas to glow brightly.
Heavens
The vast edges of our solar system – the boundary at the edge of our heliosphere where material streaming out from the sun interacts with the galactic material – is essentially invisible. It emits no light and no conventional telescope can see it. However, particles from inside the solar system bounce off this boundary and neutral atoms from that collision stream inward. Those particles can be observed by instruments on NASA's Interstellar Boundary Explorer (IBEX).
CAMBRIDGE, MA -- Increased natural gas production is seen as a crucial step away from the greenhouse gas emissions of coal plants and toward U.S. energy independence. But natural gas wells have problems: Large volumes of deep water, often heavily laden with salts and minerals, flow out along with the gas. That so-called "produced water" must be disposed of, or cleaned.
DURHAM, N.H. -- After three years of puzzling over a striking "ribbon" of energy and particles discovered by NASA's Interstellar Boundary Explorer (IBEX) at the edge of our solar system, scientists may be on the verge of cracking the mystery.
In a paper published Feb. 4, 2013, in the Astrophysical Journal, researchers, including lead author Nathan Schwadron of the University of New Hampshire, propose a "retention theory" that for the first time explains all the key observations of this astrophysical enigma.
Most mammals, including humans, see in stereo and hear in stereo. But whether they can also smell in stereo is the subject of a long-standing scientific controversy. Now, a new study shows definitively that the common mole (Scalopus aquaticus) – the same critter that disrupts the lawns and gardens of homeowners throughout the eastern United States, Canada and Mexico – relies on stereo sniffing to locate its prey. The paper that describes this research, "Stereo and Serial Sniffing Guide Navigation to an Odor Source in a Mammals," was published on Feb.
Despite its appearance, which looks much like countless other galaxies, Messier 106 hides a number of secrets. Thanks to this image, which combines data from Hubble with observations by amateur astronomers Robert Gendler and Jay GaBany, they are revealed as never before.
ANN ARBOR—Many medically minded researchers are in hot pursuit of designs that will allow drug-carrying nanoparticles to navigate tissues and the interiors of cells, but University of Michigan engineers have discovered that these particles have another hurdle to overcome: escaping the bloodstream.
Drug delivery systems promise precision targeting of diseased tissue, meaning that medicines could be more effective at lower doses and with fewer side effects. Such an approach could treat plaques in arteries, which can lead to heart attacks or strokes.
Since its October 2008 launch, NASA's Interstellar Boundary Explorer (IBEX) has provided images of the invisible interactions between our home in the galaxy and interstellar space. Particles emanating from this boundary produce a striking, narrow ribbon, which had yet to be explained despite more than a dozen possible theories. In a new "retention model," researchers from the University of New Hampshire and Southwest Research Institute suggest that charged particles trapped in this region create the ribbon as they escape as neutral atoms.
Software development is a complex and difficult task. Software developers and researchers try to deal with software development in a simple way from multiple perspectives. This leads to the use of various kinds of models, including informal, semi-formal, and formal models, and all kinds of development methods, including informal and formal methods. In fact, every software development method contains multiple models from different perspectives.
COMPASS uses the Geostationary Earth Orbit (GEO) and Inclined Geosynchronous Satellite Orbit (IGSO) satellites, which are more suitable for regional services. Its constellation is composed of 14 satellites, including 5 GEO, 5 IGSO satellites and 4 Medium Earth Orbit (MEO) satellites. As of 2012, 13 satellites have been launched. Except for G2 (unusable) and M1 (testing only), the remaining 11 satellites, including 4GEO+5IGSO+2MEO, have successfully transmitted signals and broadcasted navigational messages, to prepare for full operation starting in 2013.
[Frequent alcohol, nicotine, or cannabis use is common in young persons presenting for mental healthcare: a cross sectional study doi 10.1136/bmjopen-2012-002229]
Around one in 10 young teens with mental health issues also drinks alcohol, smokes cigarettes, and uses cannabis on a weekly basis, indicates Australian research published in the online only fully journal BMJ Open.
[Exposure to ultraviolet-B and risk of developing rheumatoid arthritis among women in the Nurses' Health Study Online First doi 10.1136/annrheumdis-2012-202302]
Regular exposure to sunlight—specifically ultraviolet B (UVB)—may reduce the risk of developing rheumatoid arthritis, indicates a large long term study published online in the Annals of the Rheumatic Diseases.
But the effect of UVB exposure was only evident among older women, possibly because younger women are more aware of the hazards of sunlight and so cover up with sun block, suggest the authors.
Cyclone Felleng traveled through the Mozambique Channel during the week of Jan. 28, 2013 and emerged south into the Southern Indian Ocean where it transitioned into a cold core low pressure area. NASA's TRMM satellite captured a look at the rainfall rates occurring in Felleng as it was making that transition on Feb. 1.
COLUMBIA, Mo. – Researchers long have evaluated the roles parents play in children's development. Now, researchers at the University of Missouri have found that mothers' directiveness, the extent to which they try to control the content and pace of young children's play, varies based on the children's ages and the mothers' ethnicities. In addition, the study found that the more directive the mothers were during play, the less engaged children were with them and the more negative emotion the children displayed toward their mothers.
Scientists at King's College London have demonstrated the ability to deliver a dried live vaccine to the skin without a traditional needle, and shown for the first time that this technique is powerful enough to enable specialised immune cells in the skin to kick-start the immunising properties of the vaccine.