Slashdot Mirror

HughPickens.com writes: Folk wisdom has it that everyone has a doppelganger; somewhere out there there's a perfect duplicate of you, with your mother's eyes, your father's nose and that annoying mole you've always meant to have removed. Now BBC reports that last year Teghan Lucas set out to test the hypothesis that everyone has a living double. Armed with a public collection of photographs of U.S. military personnel and the help of colleagues from the University of Adelaide, Lucas painstakingly analyzed the faces of nearly four thousand individuals, measuring the distances between key features such as the eyes and ears. Next she calculated the probability that two peoples' faces would match. What she found was good news for the criminal justice system, but likely to disappoint anyone pining for their long-lost double: the chances of sharing just eight dimensions with someone else are less than one in a trillion. Even with 7.4 billion people on the planet, that's only a one in 135 chance that there's a single pair of doppelgangers. Lucas says this study has provided much-needed evidence that facial anthropometric measurements are as accurate as fingerprints and DNA when it comes to identifying a criminal. "The use of video surveillance systems for security purposes is increasing and as a result, there are more and more instances of criminals leaving their 'faces' at a scene of a crime," says Ms Lucas. "At the same time, criminals are getting smarter and are avoiding leaving DNA or fingerprint traces at a crime scene." But that's not the whole story. The study relied on exact measurements; if your doppelganger's ears are 59mm but yours are 60mm, your likeness wouldn't count. "It depends whether we mean 'lookalike to a human' or 'lookalike to facial recognition software,'" says David Aldous. If fine details aren't important, suddenly the possibility of having a lookalike looks a lot more realistic. It depends on the way faces are stored in the brain: more like a map than an image. To ensure that friends and acquaintances can be recognized in any context, the brain employs an area known as the fusiform gyrus to tie all the pieces together. This holistic 'sum of the parts' perception is thought to make recognizing friends a lot more accurate than it would be if their features were assessed in isolation. Using this type of analysis, and judging by the number of celebrity look-alikes out there, unless you have particularly rare features, you may have literally thousands of doppelgangers. "I think most people have somebody who is a facial lookalike unless they have a truly exceptional and unusual face," says Francois Brunelle has photographed more than 200 pairs of doppelgangers for his I'm Not a Look-Alike project. "I think in the digital age which we are entering, at some point we will know because there will be pictures of almost everyone online.

An anonymous Slashdot reader shares a fond remembrance of Richard Feynman written by Nobel prize-winner Frank Wilczek, describing not only the history of dark energy and field theory, but how Feynman's influential diagrams "embody a deep shift in thinking about how the universe is put together... a beautiful new way to think about fundamental processes". Richard Feynman looked tired when he wandered into my office. It was the end of a long, exhausting day in Santa Barbara, sometime around 1982... I described to Feynman what I thought were exciting if speculative new ideas such as fractional spin and anyons. Feynman was unimpressed, saying: "Wilczek, you should work on something real..."

Looking to break the awkward silence that followed, I asked Feynman the most disturbing question in physics, then as now: "There's something else I've been thinking a lot about: Why doesn't empty space weigh anything?"
Feynman replied "I once thought I had that one figured out. It was beautiful..." then launched into a "surreal" monologue about how "there's nothing there!" But Wilczek remembers that "The calculations that eventually got me a Nobel Prize in 2004 would have been literally unthinkable without Feynman diagrams, as would my calculations that established a route to production and observation of the Higgs particle." His article culminates with a truly beautiful supercomputer-generated picture showing gluon field fluctuations as we now understand them today, and demonstrating the kind of computer-assisted calculations which in coming years "will revolutionize our quantitative understanding of nuclear physics over a broad front."

"A new study by the University of Adelaide's Australian Centre for Ancient DNA (ACAD), has solved a 150-year-old evolutionary mystery about the origins of the giant flightless 'ratite' birds, such as the emu and ostrich, which are found across the southern continents. This group contains some of the world's largest birds - such as the extinct giant moa of New Zealand and elephant birds of Madagascar. ... [A]ncient DNA extracted from bones of two elephant birds held by the Museum of New Zealand, Te Papa Tongarewa, has revealed a close genetic connection with the kiwi, despite the striking differences in geography, morphology and ecology between the two." Which means that the emu is not, as conventional wisdom has long held, the kiwi's closest link. Here's more on the research from the University of Adelaide.

Sean Burford writes "The South Australian Partnership for Advanced Computing (SAPAC) has unveiled its new AU$1.7 Million supercomputer named Hydra. It is an IBM 1350 Linux cluster with 126 compute nodes (xSeries 335), 1 head node (xSeries 335), 1 storage node (xSeries 345) and 1 managment node (xSeries 345). Hydra has a peak theoretical performance of 1.2 Teraflops, and has currently benchmarked at 682 Gigaflops. The current benchmark places it in the fastest three supercomputers in Australia and equivalent to the current number 80 in the world. The cluster has a total of 258 2.4Ghz Intel Xeon processors and 258GB of RAM. SAPAC expects to achieve a benchmark closer to 700 Gigaflops with further tuning. Hydra is hosted at The University Of Adelaide, who already host a 40 node cluster of Sun e420 machines."

Sean Burford writes "The South Australian Partnership for Advanced Computing (SAPAC) has unveiled its new AU$1.7 Million supercomputer named Hydra. It is an IBM 1350 Linux cluster with 126 compute nodes (xSeries 335), 1 head node (xSeries 335), 1 storage node (xSeries 345) and 1 managment node (xSeries 345). Hydra has a peak theoretical performance of 1.2 Teraflops, and has currently benchmarked at 682 Gigaflops. The current benchmark places it in the fastest three supercomputers in Australia and equivalent to the current number 80 in the world. The cluster has a total of 258 2.4Ghz Intel Xeon processors and 258GB of RAM. SAPAC expects to achieve a benchmark closer to 700 Gigaflops with further tuning. Hydra is hosted at The University Of Adelaide, who already host a 40 node cluster of Sun e420 machines."

Diabolus writes "This is the tale of a man, a bunch of disposable cameras, and his techniques for harvesting lots of capacitors to build a gauss gun. Insane..." A basic capacitor tutorial is probably in order.

richard_za writes "The common notion that long necked dinosaurs held there necks high to graze from treetops has been proven impossible. Roger Seymour, from Adelaide University's Environmental Biology Department and Harvey Lillywhite from the University of Florida. According to a research paper published at the Proceedings of the Royal Society in London, he explained that due to heart size and metablic rates the only way they could have functioned on land was with a horizontal neck. This flies in the face of images popularised in Hollywood movies such as Jurassic Park. However it is doubted that this new evidence will have any effect on the Mozilla Project."

richard_za writes "The common notion that long necked dinosaurs held there necks high to graze from treetops has been proven impossible. Roger Seymour, from Adelaide University's Environmental Biology Department and Harvey Lillywhite from the University of Florida. According to a research paper published at the Proceedings of the Royal Society in London, he explained that due to heart size and metablic rates the only way they could have functioned on land was with a horizontal neck. This flies in the face of images popularised in Hollywood movies such as Jurassic Park. However it is doubted that this new evidence will have any effect on the Mozilla Project."

NoWhere Man writes: "North Carolina-based BlueLinx, which produces consumer applications for short-range wireless systems, and" Hold on I gotta take this call.... " a telecommunications center at the University of Adelaide in Australia are developing a feature for mobile phones that interacts with Bluetooth shortwave radio-link systems in public places. The feature is designed to automatically silence cellphone ringing. Once inside the Bluetooth coverage area, cellphones with the "Q-Zone" feature will be silenced."

Sandeater writes: "BBC news is reporting that an new telescope has just been completed to search out black holes from the Australian outback. The astronomers using the telescope will be looking for huge black holes at the centres of galaxies, as well as seeing how they evolve. The Cangaroo II will be offically opened tomorrow. The BBC link can be found here."

datapulse asks: "I was wondering what exactly can be protected by a patent? Can I patent an idea or a business idea? I ask this because I've always thought that only a tangible invention could be patented. I have a lot of ideas that I believe could be of very good use but I don't have the capital to put them to work." I'm running this one mainly so we can have a discussion on the true meaning of the "patent" and why so many of us disagree with the idea of software patents. As I understand it: patents were to protect the details of implementations, not ideas, but software patents have blurred this area tremendously. (Read More)

Tom Dunstan is wondering if it might not be a good idea to start up some sort of Patent Watch: "It seems that we only hear about patents (taken out in the U.S., at least) after they get granted. How public is the patent registering process? Would it be possible for the FSF or some likeminded volunteers to keep an eye out at the patents office so that we can make representations on the idiocy of some of the patents being granted before they get given? "