photonic writes “After three years of study, the National Institute of Standards and Technology (NIST) finally released its report on the collapse of World Trade Center building 7. The main conclusion is that the building came down due to fire, not due to debris damage or some conspiracy demolition team. The fire started pretty small after the collapse of WTC 1, but was left to burn several floors out absolutely. The important finding is that the collapse was triggered by thermal expansion of beams, which could detach asymmetrically loaded girders from the main columns. Some limited pancaking of floors then caused a lack of lateral support and buckling of a single column. This triggered the failure of the entire core of the building, which finally fell down as a single piece. Crackpot theories can be discussed elsewhere; please limit the discussion to the science here. All documents can be found at NIST’s WTC page, which read like a porn magazine for finite element junkies. Simulation movies are also available. And yes, they used Beowulf clusters to do the simulations, some of which lasted for several months.”

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Adam Korbitz writes “Astrobiology Magazine reports on new research indicating extremophile microbes might be able to live on Titan, the sixth and largest moon of Saturn — in spite of the fact that the moon is largely ice and covered with lakes of liquid methane. Titan joins Mars, Venus, Europa and Enceladus as a potential home to extremophile life in our solar system.”

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Aviran brings us an analysis of Democratic Vice Presidential candidate Joe Biden’s voting record on technology issues. CNet breaks down the issues by category and provides details on the tech-related legislation he’s introduced in the past several years. Biden received a score of 37.5% on CNet’s 2006 technology voter guide. We’ve discussed the technology stances of McCain and Obama in the past.

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Filed under: Housing, Recession

It would seem to be stating the obvious, but the habits of home buyers will probably hold the key to whether the economy will go into its deepest recession in decades. That is the prevailing wisdom, but is it right?

According to Reuters, “a sharper housing bust would leave deep scars in consumer sentiment, which would likely lead to a deep recession.” Some economists and real estate experts see home prices falling another 15% to 20% from current levels.

Real estate might be a critical part of an economic recovery, but it isn’t the only one. Oil and commodities recently had their sharpest correction in years. If oil moves below $100 and the price of agricultural products moves down substantially, the implied cost of living for most Americans will get much better. Under those circumstances, homeowners have more money to pay mortgages.

Wages could also rise. Recent pressure on consumer prices makes it more likely that unions and employees will press for higher compensation. In many cases, they’ll be turned away. But, worker demands for higher pay spread across the entire economy should yield some improvements in how much people take home.

Housing prices are important, but they are not the only game in town.

Douglas A. McIntyre is an editor at 247wallst.com.

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An anonymous reader writes “Think it’s impossible to see four-dimensional objects? These videos will show you otherwise. Some mathematicians work with four-dimensional objects all the time, and they’ve developed some clever tricks to get a feeling for what they’re like. The techniques begin by imagining how two-dimensional creatures, like those in Edwin Abbot’s ‘Flatland,’ could get a feeling for three-dimensional objects. When those techniques are transferred up a dimension, the results are gorgeous.”

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Reader Otter points out in his journal a very neat use for the logic contained in Debian’s package dependency resolver: solving sudoku puzzles. To me at least, this is much more interesting than the sudoku puzzles themselves. Update: 08/24 02:51 GMT by T : Hackaday just ran a story that might tickle the same parts of your brain on a game played entirely with MySQL database queries.

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Hugh Pickens writes “A Chinese medical team led by Shuzhong Guo of the Fourth Military Medical University in Xi’an has successfully completed the first transplant to include facial bone in a transplant on a man whose face was slashed by a bear. The Chinese graft included muscles, nerves, blood vessels, cartilage and skin and included an intact salivary gland, another first. Two years after the procedure, the man can eat, drink and speak, thanks to the gradual fusing of transplanted nerves and muscles with what remained of the patient’s own. This transplant together with the another ground breaking transplant last year by French physicians that removed a big tumor that had completely infiltrated and disfigured their patient’s face, now sets the stage for a full facial transplant.”

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