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NASA

Low Quality Alloy Cause of Shuttle Main Tank Issue 118

Posted by Soulskill
from the heisenberg-compensators-were-acting-up dept.
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."
Media

1928 Time Traveler Caught On Film? 685

Posted by samzenpus
from the I-hate-time-travel-stories dept.
Many of you have submitted a story about Irish filmmaker George Clarke, who claims to have found a person using a cellphone in the "unused footage" section of the DVD The Circus, a Charlie Chaplin movie filmed in 1928. To me the bigger mystery is how someone who appears to be the offspring of Ram-Man and The Penguin got into a movie in the first place, especially if they were talking to a little metal box on set. Watch the video and decide for yourself.
Image

White House Correspondent Tweets His Heart Attack 77

Posted by samzenpus
from the dedication-to-the-job dept.
Tommy Christopher, who writes for mediate.com, has reporting in his blood, so much so that he livetweeted every part of his recent heart attack. "I gotta be me. Livetweeting my heart attack. Beat that!" and "This is not like the movies. Most deadpan heart attack evar. Still hurts even after the morphine," were among his updates as he was rushed to the hospital. Christopher is now in stable condition after recovering from emergency surgery.
Earth

New Estimates Say Earth's Oceans Smaller Than Once Believed 263

Posted by timothy
from the deeper-than-my-love-for-you dept.
Velcroman1 writes with this snippet from Fox News: "Using lead weights and depth sounders, scientists have made surprisingly accurate estimates of the ocean's depths in the past. Now, with satellites and radar, researchers have pinned down a more accurate answer to that age-old query: How deep is the ocean? And how big? As long ago as 1888, John Murray dangled lead weights from a rope off a ship to calculate the ocean's volume — the product of area and mean ocean depth. Using satellite data, researchers from the Woods Hole Oceanographic Institute set out to more accurately answer that question — and found out that it's 320 million cubic miles. And despite miles-deep abysses like the Mariana Trench, the ocean's mean depth is just 2.29 miles, thanks to the varied and bumpy ocean floor."
Businesses

+ - Building an Open Source Business Environment

Submitted by Anonymous Coward
An anonymous reader writes "As someone at the helm of a startup firm, we are currently in search of solutions for our business needs. With the maturity of many Open Source tools, we are currently looking to create an environment totally powered by these solutions. What does the Slashdot community feel are some of the best combinations of software and hardware for:
1. Network/Desktop Infrastructure, such as imaging, deployment, etc.
2. Mobile email messaging (i.e. BlackBerry-like devices)
3. Tracking systems for project management
4. Payroll and HR tools
5. Other software to ease employee interaction and collaboration

Basically, what are the visions the Slashdot community has of a business ready to scale, operating off of a fully integrated and functioning Linux and Open Source environment? Is it possible, or are we still sometime off?"
Displays

+ - Dell Exits LCD TV Business->

Submitted by
Teksty Piosenek
Teksty Piosenek writes "Dell Inc. announced this week that it will exit the LCD television business in an effort to focus on its core competencies — mainly computer systems. Dell executives announced that the company will end production of its LCD televisions by the end of this June. Dell currently sells LCD televisions in the U.S., Japan and other smaller markets."
Link to Original Source
Announcements

+ - Vintage Computer Festival East 4.0 THIS WEEKEND->

Submitted by
triple6
triple6 writes "This weekend, vintage computer enthusiasts from all over will converge on the sleepy town of Wall, New Jersey to attend the 4th annual Vintage Computer Festival East. Featuring exhibits of fully functional(!) vintage computers, we'll also have presentations and a marketplace. Help us celebrate the 30th anniversary of Commodore computers at a panel discussion with former Commodore engineers Chuck Peddle (designer of the 6502 CPU), Bil Herd, Bob Russell, and Dave Haynie. Photos from last year's event: http://midatlanticretro.org/vcf-e-3-pics/vcf-east- 3.html"
Link to Original Source

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