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Submission + - DARPA develops new air-core optical fibers ( 1

An anonymous reader writes: As part of a program for developing next generation optical gyroscopes, DARPA has demonstrated a new optical fiber with a hollow core where light travels in air. Hollow core fibers have a number of interesting properties, including the fact that light travels 30% faster in air, compared to conventional all-glass optical fibers. This new fiber is the first of its kind to have low loss, a single spatial mode, which is important for high bandwidth transmission, and polarization control. The new fiber is expected to enable high power military sensors, and high-speed, low-latency, optical networks, among other applications.

Submission + - MIT Startup's Coffee-Infuse Socks Neutralize Stinky Feet (

fangmcgee writes: Summer swelter have your feet in funk? Ministry of Supply is launching a line of men’s dress socks that are engineered to eliminate sweat and odor while providing all-day comfort at key pressure points. Derived from coffee-infused recycled-polyester fibers, the “Atlas” acts like a “Brita filter for your feet, according to the Massachusetts Institute of Technology-based startup, which launched a Kickstarter campaign to fund its development.

Submission + - China Hackers Chuck Zero-Day Malware At Spiritual Activists And Military Groups

twoheadedboy writes: A Chinese hacker group is the chief suspect of spear phishing attacks against the Falun Dafa spiritual group and military organisations in the Philippines. Data handed to TechWeek by AlienVault Labs showed how zero-day malware, designed to pilfer Outlook email account logins, was just one strand of the attacks, which are ongoing. Other malware sought to steal passwords for other accounts, dodging many commercial AV products, whilst remote access tools indicate this is a serious surveillance operation. Chinese authorities have neither confirmed nor denied the claims. But it marks another case of Internet-led surveillance with China's name attached to it, following numerous reports of mass Chinese hacking, which has already allegedly hit massive firms like Facebook and Google.

Comment Re:Standard Missing Option Gripe (Score 1) 708

""I Am Legend" was the only Will Smith movie I've seen where he isn't just reprising his Will Smith character."

Yeah, but Charlton Heston got it right the first time around in The Omega need for a remake on this one.


Vincent Price got it right the first time around in the Last Man on need for a remake on this one

Comment Re:Time compression? (Score 3, Informative) 183

"Please describe how 'time-compressing' a waveform is different than frequency-shifting it"

If I frequency shift a waveform by a factor of 2, then the time compression is also a factor of 2. The article doesn't really mention it, but the frequency shifts in this experiment are much less than a factor of 2, but the time compression is from 2.5 ns to 95 ps, a factor of 27 compression.

This is a real time lens. A spatial lens works by imparting a quadratic spatial phase to light. Diffraction then causes the beam to focus due to the quadratic spatial phase.

A time lens works in analogy to a spatial lens by imparting a quadratic temporal phase to a light pulse. Propagation in a dispersive media then leads to the time compression.

The difficulty is it is very hard to impart a quadratic phase to short light pulses. The only real way to do it is nonlinear optics, which is where the (small) frequency shifts mentioned in the article come from.


Challenges Ahead In Final Hubble Servicing Mission 130

Hugh Pickens writes "Space shuttle Atlantis is slated to lift off Monday on the fifth and final servicing mission to Hubble with four mission specialists alternating in two-astronaut teams will attempt a total of five spacewalks from Atlantis to replace broken components, add new science instruments, and swap out the telescope's six 125-pound (57-kilogram) batteries, original parts that have powered Hubble's night-side operations for nearly two decades. 'This is our final opportunity to service and upgrade Hubble,' says David Leckrone, senior project scientist for the Hubble Space Telescope. 'So we're replacing some items that are getting long in the tooth to give Hubble longevity, and then we'll try to take advantage of that five- to 10-year extra lifetime with the most powerful instrumental tools we've ever had on board.' Some of the upgrades are relatively straightforward and modular: yank out old part, put in new. But they're big parts: The 'fine guidance sensors' sound delicate but weigh as much as a grand piano back on Earth. But what's different this time is that the astronauts will also open up some instruments and root around inside, doing Geek Squad-like repairs while wearing bulky spacesuits and traveling around the planet at 17,000 mph. 'We have this choreographed almost down to the minute of what we want the crew to do. It's this really fine ballet,' said Keith Walyus, the servicing mission operations manager at Goddard. 'We've been training for this for seven years. We can't wait for this to happen.'"

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