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Submission + - BBC optimising UHD video streaming over IP

johnslater writes: A friend at the BBC has written a short description of his project to deliver UHD video over IP networks. The application bypasses the OS network stack, and constructs network packets directly in a buffer shared with the network hardware, achieving a ten-fold throughput improvement. He writes: "Using this technique, we can send or receive uncompressed UHD 2160p50 video (more than 8 Gbps) using a single CPU core, leaving all the rest of the server's cores free for video processing." This is part of a broader BBC project to develop an end-to-end IP-based studio system.

Comment Iceland is already there (Score 1) 294

I just got back from a 6-day visit to Iceland. For the first time visiting a foreign country, I completed the trip without needing to acquire any local currency. I paid for everything using my US-based credit card using chip and signature. A couple of transactions (pay and display parking) were automated without any need for either PIN or signature.

Submission + - Radio silence at the Square Kilometer Array (

johnslater writes: The Guardian has a story on the radio silence requirements at the Square Kilometer Array in Australia. The RF requirements for the SKA are far more stringent than at the US National Radio Quiet Zone at Greenbank, to such an extent that the specialized supercomputers to control the array have specially shielded data centers, and the as-yet-unbuilt supercomputer to process the data will be located hundreds of miles away in Perth. To quote Dr John Morgan in the article: "You can guarantee that the thing that SKA will be remembered for ... is going to be the thing you have not thought of. It’s the unknown unknown."

Comment Re:Left or Right? (Score 1) 475

There's a lot of urban myth about this. In UK law the tolerance is actually 10% + 4kph, or 2.5mph, and it applies to the speedometer in the car, not to the true speed. This is merely a wiggle factor allowed for the speedometer in the car, which is allowed to read high up to the above formula, but never low.

So for a true speed of 70mph, the car's speedometer may legally display between 70 and 79.5. So it is not a excuse to speed, as the tolerance is only on the upside. A speedo that reads low is out of spec and illegal. Thus most cars have speedos that read a little high by design, in order to comply with this regulation. In my experience about 5% high is typical, so 73.5 indicated for true 70.

AFAIK any allowance by the cops over the true speed is entirely at their discretion. In theory you can still be ticketed for 71. IMHO this is a good thing, as it allows boy racers to surge along at an indicated 85, while still actually within what most cops would consider a safe envelope.

This policy is in everyone's interests:
- the car manufacturers like it because the wiggle factor means they can build the speedo to a lower, cheaper standard;
- the enthusiastic driver likes it because it gives an exaggerated impression of the car's performance (I was doing 100!^H^H^H^H90!);
- the authorities like it because it curbs excessive speed and thus enhances safety;
- we geeks tolerate it because we have our own independent measuring equipment.

Submission + - Chicago transit system fooled by federal ID cards

johnslater writes: The Chicago Transit Authority's new "Ventra" stored-value fare card system has another big problem. It had a difficult birth, with troubles earlier this fall when legitimate cards failed to allow passage, or sometimes double-billed the holders. Last week a server failure disabled a large portion of the system at rush hour. Now it is reported that some federal government employee ID cards allow free rides on the system. The system is being implemented by Cubic Transportation Systems for the bargain price of $454 million.

Submission + - Encrypted traffic being intercepted

lucag writes: It appears that most of the encrypted traffic over the net is currently being intercepted and in some way decoded by NSA.
Here there are some references, unfortunately scant on the details that matter; actually it is not clear if it is broken algorithms, compromised protocols, MITM attacks or just plain old simple "enforced" cooperation by the providers.
The Military

United States Begins Flying Stealth Bombers Over South Korea 567

skade88 writes "The New York Times is reporting that the United States has started flying B-2 stealth bomber runs over South Korea as a show of force to North Korea. The bombers flew 6,500 miles to bomb a South Korean island with mock explosives. Earlier this month the U.S. Military ran mock B-52 bombing runs over the same South Korean island. The U.S. military says it shows that it can execute precision bombing runs at will with little notice needed. The U.S. also reaffirmed their commitment to protecting its allies in the region. The North Koreans have been making threats to turn South Korea into a sea of fire. North Korea has also made threats claiming they will nuke the United States' mainland."

Theory is gray, but the golden tree of life is green. -- Goethe