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Communications

Twisted Radio Beams Could Untangle the Airwaves 183

Posted by ScuttleMonkey from the only-the-flying-spaghetti-monster-would-know-for-sure dept.
Urchin writes "The radio frequency spectrum available for wireless communication is becoming increasingly crowded thanks to new wireless technology. A solution to the shrinking space might be to put a spin on radio beams during their transmission, to produce a twisted beam, according to Swedish physicists. In theory, huge amounts of data could be sent in the pitch of the twist, which is distinct from the amplitude and frequency of radio waves — the features used at the moment to send information."

Comment Re:Motorcycle (Score 1) 887

by Eagle7 (#26413181) Attached to: How do you get to work?

Absolutely - I ride a "push bike" to work for at least half of my commutes. And for those of us on bicycles, the "local smog" element of the motorcycle is disturbing, since we are breathing in everything they are putting out. When even a fairly modern motorcycle or scooter goes by, the amount of pollutants coming out of the tailpipe is clearly more than a car, based upon the nose & lung test.

Comment Re:Motorcycle (Score 2, Interesting) 887

by Eagle7 (#26412151) Attached to: How do you get to work?

It's a shame that his motorcycle most likely puts out more emissions than that SUV.

"Are motorcycles a less-polluting alternative to cars? No, in fact, motorcycles produce more harmful emissions per mile than a car or even a large SUV. The current federal motorcycle standard for hydrocarbon emissions is about 90 times the hydrocarbon standard for today's passenger cars."

From: http://www.epa.gov/OMS/regs/roadbike/420f03046.pdf
Transportation

Volvo Introduces a Collision-Proof Car 743

Posted by kdawson from the whoa-nellie dept.
carazoo.com sends along a story on Volvo's upcoming crash-proof car. The company will introduce a concept car based on the S60 this month at the Detroit Auto Show, looking ahead a few years to the goal that by 2020 "no one should be killed or injured in a Volvo car." The concept car will have forward-looking radar as a proximity sensor, and the ability to brake if a collision is imminent. When the car senses a collision, a light flashes on the windscreen display along with an audible warning. If the driver doesn't act, the car will brake automatically.
Security

Submission + - Protecting IM from the NSA, a Canadian's view 3

Submitted by
holden
holden writes: "Ian Goldberg, leading security researcher, professor at the university of waterloo, cypherpunk and co-creator of the Off-the-Record Messaging (OTR) protocol recently gave a talk on protecting your IM conversations. He discusses OTR and its importance in today's world with warrant-less wire tapping and all that bad stuff. With OTR users benefit from being able to have truly private conversations over IM, by using encryption to obtain authentication, deniability, and perfect forward secrecy, while working within their existing IM infrastructure. With the recent NSA wiretapping activities and increasing Big Brother presence, security and OTR are increasingly important. An avi of the talk is available by http as well as by bittorrent and a bunch of other formats."

Feed Science Daily: Tuberculosis Breaches Borders, But Not Public Health (sciencedaily.com)

From feed by sdfeed
Immigrants from countries with high rates of tuberculosis who move to countries of low TB incidence do not pose a public health threat to native citizens, according to researchers in Norway, who analyzed the incidence and genetic origins of all known cases of TB in the country between 1993 and 2005.

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