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Thu, 18 Dec 2014 15:45:56 EST
Improving rechargeable batteries by focusing on graphene oxide paper
An engineering team has discovered some of graphene oxide's important properties that can improve sodium- and lithium-ion flexible batteries.
Thu, 18 Dec 2014 15:45:54 EST
'Tipping points' for sea level rise related flooding determined
By 2050, a majority of US coastal areas are likely to be threatened by 30 or more days of flooding each year due to dramatically accelerating impacts from sea level rise, according to a new study.
Thu, 18 Dec 2014 15:45:48 EST
Glimpsing pathway of sunlight to electricity
Four pulses of laser light on nanoparticle photocells in a spectroscopy experiment has opened a window on how captured sunlight can be converted into electricity. The work, which potentially could inspire devices with improved efficiency in solar energy conversion, was performed on photocells that used lead-sulfide quantum dots as photoactive semiconductor material.
Thu, 18 Dec 2014 15:45:44 EST
New, tighter timeline confirms ancient volcanism aligned with dinosaurs' extinction
A definitive geological timeline shows that a series of massive volcanic explosions 66 million years ago played a role in the extinction event that claimed Earth's non-avian dinosaurs, and challenges the dominant theory that a meteorite impact was the sole cause of the extinction.
Thu, 18 Dec 2014 15:45:11 EST
Physicists characterize electronic, magnetic structure in transition metal oxides
Scientists have characterized the electronic and magnetic structure in artificially synthesized materials called transition metal oxides.
Thu, 18 Dec 2014 15:45:08 EST
Instant-Start Computers Possible with New Breakthrough
If data could be encoded without current, it would require much less energy and make things like low-power, instant-on computing a ubiquitous reality. Scientists have made a breakthrough in that direction with a room-temperature magnetoelectric memory device. Equivalent to one computer bit, it exhibits the holy grail of next-generation nonvolatile memory: magnetic switchability, in two steps, with nothing but an electric field.
Thu, 18 Dec 2014 15:44:54 EST
Dust devil and the details: Spinning up a storm on Mars
Spinning up a dust devil in the thin air of Mars requires a stronger updraft than is needed to create a similar vortex on Earth, researchers show. “To start a dust devil on Mars you need convection, a strong updraft,” said Bryce Williams, an atmospheric science graduate student at UAH. “We looked at the ratio between convection and surface turbulence to find the sweet spot where there is enough updraft to overcome the low level wind and turbulence. And on Mars, where we think the process that creates a vortex is more easily disrupted by frictional dissipation – turbulence and wind at the surface – you need twice as much convective updraft as you do on Earth.” Williams and UAH’s Dr. Udaysankar Nair looked for the dust devil sweet spot by combining dat
Thu, 18 Dec 2014 14:10:52 EST
In one aspect of vision, computers catch up to primate brain
For decades, neuroscientists have been trying to design computer networks that can mimic visual skills such as recognizing objects, which the human brain does very accurately and quickly. Until now, no computer model has been able to match the primate brain at visual object recognition during a brief glance. Now neuroscientists have found that one of the latest generation of 'deep neural networks' matches the primate brain.
Thu, 18 Dec 2014 14:10:04 EST
Ibuprofen use leads to extended lifespan in several species, study shows
A common over-the-counter drug that tackles pain and fever may also hold keys to a longer, healthier life, according to a Texas A&M AgriLife Research scientist. Regular doses of ibuprofen extended the lifespan of multiple species.
Thu, 18 Dec 2014 14:09:08 EST
Origin of long-standing space mystery revealed: Origin of the 'theta aurora'
Scientists have solved a long-standing space mystery - the origin of the 'theta aurora'. Auroras are the most visible manifestation of the Sun's effect on Earth. They are seen as colorful displays in the night sky, known as the Northern or Southern Lights. They are caused by the solar wind, a stream of plasma - electrically charged atomic particles - carrying its own magnetic field, interacting with the earth's magnetic field. Normally, the main region for this impressive display is the 'auroral oval', which lies at around 65-70 degrees north or south of the equator, encircling the polar caps. However, auroras can occur at even higher latitudes. One type is known as a 'theta aurora' because seen from above it looks like the Greek letter theta - an oval with a line crossing through the center.
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