BJ_Covert_Action writes "NASA engineers have finally discovered the root cause of the cracks that have been found on space shuttle Discovery's main external tank. The main tank, one of the 'Super Lightweight Tank' models developed by Lockheed-Martin, employs an aluminum-lithium alloy developed by Lockheed-Martin specifically for this application. The new alloy is used in various structural stringers throughout the SLWT design. Unfortunately, the batch of this alloy used in the tank that is currently mated with the Discovery shuttle appears to be of low quality. The alloy used in the stringers has a 'mottled' appearance, compared to the nominal appearance typically used in the main tank stringers (see picture in article). This appearance is indicative of a fracture threshold that is significantly lower than typical. NASA has determined, through testing, that this low grade alloy has only 65% of the fracture strength of the nominal alloy typically used. NASA engineers have devised a potential fix to the problem that they are currently testing to ensure the repair will cause no unintended consequences. NASA plans to have the Discovery shuttle ready to launch again by February 24th, 2011."

It turns out the soy-based wire covering on cars built after 2002 is irresistible to rodents. Nobody knows this better than those unlucky enough to park at DIA's Pikes Peak lot. The rabbits surrounding the area have been using the lot as an all-you-can-eat wiring buffet. Looks like it's time to break out The Holy Hand Grenade of Antioch.

bleedingpegasus sends word that the US Air Force will be grabbing up 2,200 new PlayStation 3 consoles for research into supercomputing. They already have a cluster made from 336 of the old-style (non-Slim) consoles, which they've used for a variety of purposes, including "processing multiple radar images into higher resolution composite images (known as synthetic aperture radar image formation), high-def video processing, and 'neuromorphic computing.'" According to the Justification Review Document (DOC), "Once the hardware configuration is implemented, software code will be developed in-house for cluster implementation utilizing a Linux-based operating software."

schliz writes "Researchers are investigating large swarms of up to 10,000 miniature robots which can work together to form a single, artificial life form. A resulting artificial immune system is expected to be able to detect faults and make recommendations to a high-level control system about corrective action — much like how a person's natural immune system is able to cope with unfamiliar pathogens."

Balistyx writes to mention that Comcast has announced the first test of 100-gigabit-per-second optical networking equipment designed to carry data over a production fiber network. The trial equipment will connect Philadelphia and McLean, VA. "In November, Verizon said it completed the first field test of 100-Gbps optical transmission on a live 312-mile network route between Tampa, Fla., and Miami. The telco's test used a live video feed from the FiOS TV network, and optical equipment from Alcatel-Lucent. Comcast's test is different, according to Schanz, for several reasons: It's running live traffic, and the 100-Gbps wavelengths in the Comcast trial are running over the same physical fiber as its existing 40-Gbps wavelengths, which are handled by Cisco Systems gear."