Δευτέρα, 26 Μαΐου 2014

ScienceDaily: Top News

ScienceDaily: Top News


Advanced light: Sending entangled beams through fast-light materials

Posted: 25 May 2014 12:53 PM PDT

Whole beams, not just particles, can be entangled. This, plus anomalous dispersion in 'fast-light' materials, allows signals be to 'advanced' over signals travelling in vacuum, at least in a limited sense.

Mind alteration device makes flies sing and dance

Posted: 25 May 2014 12:47 PM PDT

Scientists have developed a special device for the thermogenetic control of flies. This tool, called FlyMAD, enabled the scientists to target light or heat to specific body regions of flies in motion and to analyse the animals' brain cells. Compared to other techniques, FlyMAD allows highly improved temporal resolution. Using the new technology, scientists got new insight into the role of two neuronal cell types in courtship behavior of flies.

A new way to make sheets of graphene

Posted: 23 May 2014 11:53 AM PDT

Graphene's promise as a material for new kinds of electronic devices, among other uses, has led researchers around the world to study the material in search of new applications. But one of the biggest limitations to wider use of the strong, lightweight, highly conductive material has been the hurdle of fabrication on an industrial scale.

Social marketing at the movies

Posted: 23 May 2014 11:53 AM PDT

Word-of-mouth marketing is recognized as a powerful route from long-tail sales to blockbuster, whether one is talking about the latest fishy ice cream flavor or a Hollywood romantic comedy. In the age of social media and online networking sites, such as Twitter and Facebook, the potential for spreading the word could mean the difference between consumers seeing a product as the best thing since sliced bread or the most rotten of tomatoes.

Flatland optics with graphene: Smaller and faster photonic devices and circuits

Posted: 23 May 2014 06:42 AM PDT

Researchers have introduced a platform technology based on optical antennas for trapping and controlling light with the one-atom-thick material graphene. The experiments show that the dramatically squeezed graphene-guided light can be focused and bent, following the fundamental principles of conventional optics. The work opens new opportunities for smaller and faster photonic devices and circuits.

Chip produces and detects specialized gas for biomedical analysis

Posted: 22 May 2014 09:35 AM PDT

A chip-scale device that both produces and detects a specialized gas used in biomedical analysis and medical imaging has been built and demonstrated. The new microfluidic chip produces magnetized xenon gas and then detects even the faintest magnetic signals from the gas. Magnetized xenon can be used as a marker for detecting biomolecules in liquids. Conventional systems for producing and using this gas can be as big as a car.

NCNR neutrons highlight possible battery candidate

Posted: 22 May 2014 09:35 AM PDT

Analysis of a manganese-based crystal has produced the first clear picture of its molecular structure. The findings could help explain the magnetic and electronic behavior of the whole family of crystals, many of which have potential for use in batteries.

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