Τρίτη 27 Νοεμβρίου 2012

ScienceDaily: Top Technology News

ScienceDaily: Top Technology News

'Pac-Man' moons: Cassini finds a video gamers' paradise at Saturn

Posted: 26 Nov 2012 12:11 PM PST

You could call it "Pac-Man, the Sequel." Scientists with NASA's Cassini mission have spotted a second feature shaped like the 1980s video game icon in the Saturn system, this time on the moon Tethys. (The first was found on Mimas in 2010). The pattern appears in thermal data obtained by Cassini's composite infrared spectrometer, with warmer areas making up the Pac-Man shape.

Flexible, low-voltage circuits made using nanocrystals

Posted: 26 Nov 2012 11:30 AM PST

Electronic circuits are typically integrated in rigid silicon wafers, but flexibility opens up a wide range of applications in a world where electronics are becoming more pervasive. Finding materials with the right mix of performance and manufacturing cost, however, remains a challenge. Now researchers have shown that nanoscale particles, or nanocrystals, of the semiconductor cadmium selenide can be "printed" or "coated" on flexible plastics to form high-performance electronics.

Novel power system for space travel tested

Posted: 26 Nov 2012 10:13 AM PST

Engineers have demonstrated a new concept for a reliable nuclear reactor that could be used on space flights.

New device hides, on cue, from infrared cameras

Posted: 26 Nov 2012 10:13 AM PST

Now you see it, now you don't. A new device can absorb 99.75 percent of infrared light that shines on it. When activated, it appears black to infrared cameras.

Fostering Curiosity: Mars Express relays rocky images

Posted: 26 Nov 2012 10:09 AM PST

For the first time, ESA's Mars orbiter has relayed scientific data from NASA's Curiosity rover on the Red Planet's surface. The data included detailed images of 'Rocknest3' and were received by ESA's deep-space antenna in Australia.

Modeling the breaking points of metallic glasses

Posted: 26 Nov 2012 08:09 AM PST

Metallic glass alloys (or liquid metals) are three times stronger than the best industrial steel, but can be molded into complex shapes with the same ease as plastic. These materials are highly resistant to scratching, denting, shattering and corrosion. Mathematical methods developed by scientists will help explain why liquid metals have wildly different breaking points.

New methods for cooling of ions developed

Posted: 26 Nov 2012 08:06 AM PST

Among the most important techniques developed in atomic physics over the past few years are methods that enable the storage and cooling of atoms and ions at temperatures just above absolute zero. Scientists have now demonstrated in an experiment that captured ions can also be cooled through contact with cold atoms and may thus be stored in so-called ion traps in a stable condition for longer periods of time. This finding runs counter to predictions that ions would actually be heated through collisions with atoms.

Sieve holds nanoparticles and acts as solar absorber

Posted: 26 Nov 2012 08:05 AM PST

A membrane consisting of polymer fibers and proteins makes a novel filter for tiny, nano-scaled particles in aqueous solutions.

Scanning innovation can reduce radiation exposure and improve personalized medicine

Posted: 26 Nov 2012 08:04 AM PST

New combinations of medical imaging technologies hold promise for improved early disease screening, cancer staging, therapeutic assessment, and other aspects of personalized medicine. The integration of multiple major tomographic scanners into a single framework is a new way of thinking in the biomedical imaging world and is evolving into a grand fusion of many imaging modalities known as omni-tomography.
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