Source: http://news.feedzilla.com/en_us/stories/politics/top-stories/301041596?client_source=feed&format=rss
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Wednesday, April 24, 2013
Tuesday, April 23, 2013
Life of Pi star says blessing to work with Ang Lee
NEW DELHI (AP) ? "Life of Pi" actor Suraj Sharma credits director Ang Lee with setting him on a path to continue with a career in movies.
Sharma told The Times of India in an interview published Tuesday that getting to work with the Oscar-winning director on "Life of Pi" was a blessing.
"The amount I learned and did was awesome. Ang gave me a path. Before that, I didn't even know what I would do in life," he was quoted as saying. After making the movie, "I know I want to tell stories," he said.
"I don't know whether I just want to act or be behind the camera, holding the camera or just being the boom director. But I want to be on the sets. It has to be something to do with cinema," he said.
Sharma, 20, said his next Hollywood film will be "Million Dollar Arm." The film revolves around a real life reality show that searched for potential Major League Baseball pitchers among Indian cricketers.
Source: http://news.yahoo.com/life-pi-star-says-blessing-ang-lee-115722526.html
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Monday, April 22, 2013
Physicists find right (and left) solution for on-chip optics: Nanoscale router converts and directs optical signals efficiently
Apr. 22, 2013 ? A Harvard-led team of researchers has created a new type of nanoscale device that converts an optical signal into waves that travel along a metal surface. Significantly, the device can recognize specific kinds of polarized light and accordingly send the signal in one direction or another.
The findings, published in the April 19 issue of Science, offer a new way to precisely manipulate light at the subwavelength scale without damaging a signal that could carry data. This opens the door to a new generation of on-chip optical interconnects that can efficiently funnel information from optical to electronic devices.
"If you want to send a data signal around on a tiny chip with lots of components, then you need to be able to precisely control where it's going," says co-lead author Balthasar M?ller, a graduate student at the Harvard School of Engineering and Applied Sciences (SEAS). "If you don't control it well, information will be lost. Directivity is such an important factor."
The coupler transforms incoming light into a wave called a surface plasmon polariton, a surface ripple in the sea of electrons that exists inside metals.
In the past, it has been possible to control the direction of these waves by changing the angle at which light strikes the surface of the coupler, but, as M?ller puts it, "This was a major pain. Optical circuits are very difficult to align, so readjusting the angles for the sake of routing the signal was impractical."
With the new coupler, the light simply needs to come in perpendicularly, and the device does the rest. Acting like a traffic controller, it reads the polarization of the incoming light wave -- which might be linear, left-hand circular, or right-hand circular -- and routes it accordingly. The device can even split apart a light beam and send parts of it in different directions, allowing for information transmission on multiple channels.
The coupler consists of a thin sheet of gold, peppered with tiny perforations. But the precise pattern of these slits, arranged rather like herringbones, is where the genius lies.
"The go-to solution until now has been a series of parallel grooves known as a grating, which does the trick but loses a large portion of the signal in the process," says principal investigator Federico Capasso, Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical Engineering at Harvard SEAS. "Now perhaps the go-to solution will be our structure. It makes it possible to control the direction of signals in a very simple and elegant way."
Because the new structure is so small -- each repeating unit of the pattern is smaller than the wavelength of visible light -- the researchers believe it should be easy to incorporate the design into novel technologies, such as flat optics.
Yet Capasso speaks most animatedly about the possibilities for incorporating the new coupler into future high-speed information networks that may combine nanoscale electronics (which currently exist) with optical and plasmonic elements on a single microchip.
"This has generated great excitement in the field," Capasso says.
M?ller and Capasso were joined on this work by co-lead author Jiao Lin, a former SEAS postdoctoral fellow who is now at the Singapore Institute of Manufacturing Technology; and coauthors Qian Wang and Guanghui Yuan, of Nanyang Technological University, Singapore; Nicholas Antoniou, Principal FIB Engineer at the Harvard Center for Nanoscale Systems; and Xiao-Cong Yuan, a professor at the Institute of Modern Optics at Nankai University in China.
The research was supported by the U.S. Air Force Office of Scientific Research, the Agency for Science, Technology, and Research (A*STAR) in Singapore, the National Natural Science Foundation of China, the Ministry of Science and Technology of China, and the National Research Foundation of Singapore. Part of the work was performed at the Harvard Center for Nanoscale Systems, which is a member of the National Nanotechnology Infrastructure Network, supported by the U.S. National Science Foundation.
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The above story is reprinted from materials provided by Harvard School of Engineering and Applied Sciences.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Journal Reference:
- J. Lin, J. P. B. Mueller, Q. Wang, G. Yuan, N. Antoniou, X.-C. Yuan, F. Capasso. Polarization-Controlled Tunable Directional Coupling of Surface Plasmon Polaritons. Science, 2013; 340 (6130): 331 DOI: 10.1126/science.1233746
Note: If no author is given, the source is cited instead.
Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.
Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/_0lvH4V3B7c/130422143313.htm
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Israel: Gaza militants fired from Sinai last week
JERUSALEM (AP) ? Israel's prime minister is accusing Gaza militants of carrying out a rocket attack from Egypt's Sinai desert on a southern Israeli resort last week.
Benjamin Netanyahu said Sunday that "the shooters were apparently a terror squad that left Gaza and used Sinai territory to attack a city in Israel." He called the attack unacceptable and said Israel will charge a "heavy price."
A shadowy extremist Muslim Salafi group claimed responsibility for firing two rockets at Eilat. Nobody was hurt.
Islamic militants, some inspired by al-Qaida, have increased activity in Sinai since Egyptian President Hosni Mubarak was ousted in 2011. There are dozens of smuggling tunnels under the Sinai-Gaza border.
Hamas routinely arrests Salafi activists. Hamas sees them as a threat to its rule, while Salafis consider Hamas as too moderate.
Source: http://news.yahoo.com/israel-gaza-militants-fired-sinai-last-week-095741583.html
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CBS News says some of its Twitter accounts were hacked
(Reuters) - Social media accounts maintained by CBS News programs, "60 Minutes" and "48 Hours," were compromised on Saturday, the two programs' official Twitter accounts said.
A post on the "60 Minutes" Twitter microblog account, @60Minutes, said, "PLEASE NOTE: Our Twitter account was compromised earlier today. We are working with Twitter to resolve." Another post read, "A message that was posted earlier to this account was not written or sent by @60Minutes or its staff."
The Twitter account for @48Hours showed a similar message, and several blogs said a third account, @CBSDenver, also had been hacked.
Tech bloggers posted screenshots of fake posts that appeared under the CBS accounts, including one from @48Hours that read, "General Dempsey calls for #Obama's arrest under new anti-terror laws #48hours."
On its own official account, @CBSNews, the news organization said it had "experienced problems" on the other two accounts, and added, "Twitter is resolving issues."
The rogue posts appeared to have been removed from Twitter.com later on Saturday.
Copyright 2013 Thomson Reuters.
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Sunday, April 21, 2013
This Wonderful Photographer Gave a Boy Suffering with Muscular Dystrophy a Chance to Live Out His Dreams
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