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New submitter HeLLFiRe1151 sends this quote from Physics Central:
"Here's a practical application for your physics education: using math to successfully beat a traffic ticket in court. Dmitri Krioukov, a physicist based at the University of California San Diego, did just that to avoid paying a fee for (purportedly) running a stop sign. Krioukov not only proved his innocence, but he also posted a paper detailing his argument online (PDF) on the arXiv server."
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HairyNevus writes
"An international team of scientists used satellite technology to conduct a census of emperor penguin populations from outer space. Honing in on their colonies by looking for the brown patches of penguin guano that stand out in the snowy antarctic, high resolution images were taken and used to count the total number of emperor penguin species on the continent. The result was a census of 595,000 penguins, almost double the previous estimates of 270,000-350,000 emperors. This includes seven new colonies which had not been previously identified. Although this is uplifting data, computer modeling still shows that loss of ice flows in the northern reaches could result in problems for the penguins."
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Hugh Pickens writes
"Dr. James Hansen, director of the NASA's Goddard Institute for Space Studies, who first made warnings about climate change in the 1980s, says that public skepticism about the threat of man-made climate change has increased despite the growing scientific consensus. He says that without public support, it will be impossible to make the changes he and his colleagues believe need to occur to protect future generations from the effects of climate change. 'The science has become stronger and stronger over the past five years while the public perception is has gone in completely the other direction. That is not an accident,' says Hansen. 'There is a very concerted effort by people who would prefer to see business to continue as usual. They have been winning the public debate with the help of tremendous resources.' Hansen's comments come as recent surveys have revealed that public support for tackling climate change has declined dramatically in recent years. A recent BBC poll found that 25% of British adults did not think global warming is happening and over a third said many claims about environmental threats are 'exaggerated,' compared to 24 per cent in 2000. Dr. Benny Peiser, director of skeptical think tank The Global Warming Policy Foundation, says it's time to stop exaggerating the impact of global warming and accept the uncertainty of predictions about the rate of climate change. 'James Hensen has been making predictions about climate change since the 1980s. When people are comparing what is happening now to those predictions, they can see they fail to match up.'"
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MatthewVD writes
"Some time in the next decade, the Voyager probes will run out of juice and finally go silent after almost a half century of exploration. John Rennie writes that the lack of any meaningful effort to follow up with a mission to interstellar space shows the "fragile, inconsistent state of space exploration." It's particularly frustrating since the Voyagers have tantalized astronomers with a glimpse into about how the sun's magnetic field protects us from (or exposes us to) cosmic rays. Have we gone as far as we're willing to go in space?"
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Hugh Pickens writes
"Natalie Wolchover says even the most die-hard skeptics among us believe in magic. Humans can't help it: though we try to be logical, irrational beliefs — many of which we aren't even conscious of — are hardwired in our psyches. 'The unavoidable habits of mind that make us think luck and supernatural forces are real, that objects and symbols have power, and that humans have souls and destinies are part of what has made our species so evolutionarily successful,' writes Wolchover. 'Believing in magic is good for us.' For example, what do religion, anthropomorphism, mysticism and the widespread notion that each of us has a destiny to fulfill have in common? According to research by Matthew Hutson, underlying all these forms of magical thinking is the innate sense that everything happens for a reason. And that stems from paranoia, which is a safety mechanism that protects us. 'We have a bias to see events as intentional, and to see objects as intentionally designed,' says Hutson. 'If we don't see any biological agent, like a person or animal, then we might assume that there's some sort of invisible agent: God or the universe in general with a mind of its own.' According to anthropologists, the reason we have a bias to assume things are intentional is that typically it's safer to spot another agent in your environment than to miss another agent. 'It's better to mistake a boulder for a bear than a bear for a boulder,' says Stewart Guthrie. In a recent Gallup poll, three in four Americans admitted to believing in at least one paranormal phenomenon. 'But even for those few of us who claim to be complete skeptics, belief quietly sneaks in. Maybe you feel anxious on Friday the 13th. Maybe the idea of a heart transplant from a convicted killer weirds you out. ... If so, on some level you believe in magic.'"
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astroengine writes
"Astronomers believe they have found a second distant planet around Fomalhaut, a bright young neighbor star, and that the far-out world — like its sister planet — is shepherding and shaping the star's ring of dust. If confirmed, theorists have some work to do explaining how the planet, believed to be a few times bigger than Mars, ended up 155 times as far away from its parent star as Earth is to the sun. 'We're learning a lot about planets that are close to their stars, but that is not the full picture. We also want to know about systems where planets are very far out. By considering near-, far- and mid-range, we can get a complete picture of planet formation,' University of Florida astronomer Aaron Boley said."
There was another fascinating bit of news about Fomalhaut a few days ago: "ESA’s Herschel Space Observatory has studied the dusty belt around the nearby star Fomalhaut. The dust appears to be coming from
collisions that destroy up to thousands of icy comets every day."
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New submitter cb_is_cool writes
"From the Beeb: 'The Pentagon has put in an order for prototype contact lenses that give users a much wider field of vision. The lenses are designed to be paired with compact heads up display units — glasses that allow images to be projected onto their lenses.' Hopefully, any mugger within 50 yards will have a red status bar above his head. 'The central part of each lens sends light from the HUD towards the middle of the pupil, while the outer part sends light from the surrounding environment to the pupil's rim. The retina receives each image in focus, at the same time."
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New submitter boner writes
"In a follow-up to an earlier Slashdot story, scientists at the Technical University of Delft in the Netherlands yesterday published their findings that they have indeed found the Majorana particle. The announcement on the university website provides both a summary of the academic paper (PDF) and background of this groundbreaking discovery. Quoting: 'Majorana fermions are very interesting – not only because their discovery opens up a new and uncharted chapter of fundamental physics; they may also play a role in cosmology. A proposed theory assumes that the mysterious ‘dark matter, which forms the greatest part of the universe, is composed of Majorana fermions. Furthermore, scientists view the particles as fundamental building blocks for the quantum computer.'"
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tqft writes
"What the world needs is more truly random sources of numbers. Researchers from Australian National University have found a brilliant way to make one: 'We do this by splitting a beam of light into two beams and then measuring the power in each beam. Because light is quantised, the light intensity in each beam fluctuates about the mean. Those fluctuations, due ultimately to the quantum vacuum, can be converted into a source of random numbers. Every number is randomly generated in real time and cannot be predicted beforehand.' So if you need some really random numbers, just use their generator service."
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thomst writes
"Seth Borenstein of the AP reports on a story in the April 13 edition of Science (abstract here, full article paywalled) about a study of baboons at Aix-Marseille University in France that demonstrates the primates are capable of distinguishing between short, but real English words and gibberish letter combinations of similar length with an average of 75% accuracy over the course of 300,000 trials. One particularly talented subject named Dan, a 4-year-old baboon, is capable of 80% accuracy. The study's lead scientist, Jonathan Grainger, explains that a simple change in the study's methodology — allowing the subjects to work the training machine at times of their own choosing, rather than on a schedule determined by the researchers, made all the difference. When they are shown a sequence of letters, the subjects must choose between pushing a blue 'button' on a touchscreen (for a nonsense combination), or a green one (for an actual word). If they choose correctly, they get a food reward. Borenstein writes, 'The key is that these animals not only learned by trial and error which letter combinations were correct, but they also noticed which letters tend to go together to form real words, such as SH but not FX, said Grainger. So even when new words were sprung on them, they did a better job at figuring out which were real. Grainger said a pre-existing capacity in the brain may allow them to recognize patterns and objects, and perhaps that's how we humans also first learn to read.'"
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techfun89 writes
"New analysis of data, now 36 years old, from the Viking robots, suggests that NASA had found life on Mars. This conclusion was published by an international team of mathematicians and scientists this week. The Labeled Release experiment looked for signs of microbial metabolism in soil samples in 1976. The general thinking was that the experiment had found geological not biological activity. However, the new study approached things differently. Researchers broke the data into sets of numbers and analyzed the results for complexity. What they found were close correlations between the Viking results' complexity and those of terrestrial biological data sets. Based on this they concluded that the Viking results were more biological in nature than just geological processes."
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scibri writes
"Three months ago, China started to crack down on unlicensed stem cell treatments in the country. But it doesn't seem to have had much effect. Not one clinic has registered as required, and they continue to operate openly, offering unproven treatments for diseases such as Parkinson's and Alzheimer's."
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grumpyman writes
"A coalition of 49 ex-NASA employees, including seven Apollo astronauts, have accused the U.S. space agency of sullying its reputation by taking the 'extreme position' of concluding that carbon dioxide is a major cause of climate change. Is the claim in this letter opinion or fact?"
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First time accepted submitter
dmr001 writes
"In its fortnightly Communicable Disease newsletter (PDF), Oregon Public Health officials note increasing cases of pertussis (whooping cough) in infants, with 146 hospitalizations noted in the 2 year period ending March 2011, and at least 4 deaths since 2003. Most cases are attributed to lack of vaccination, with 86% of those due to parents declining the vaccine. 'Most of our cases are occurring in under- or unvaccinated children, so getting these kids vaccinated seems to the most obvious approach to reducing illness. In principle... pertussis could be eradicated; but we have a long way to go.'"
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TPIRman writes
"In 1994, a physics doctoral student named Dave Ring assembled more than 100 math and puzzle enthusiasts on Usenet for what became one of the earliest online 'crowdsourcing' projects. Their goal: to determine if every hand in Windows' FreeCell solitaire game was in fact winnable, as the program's help file implied. Their efforts soon focused in on one incredibly stubborn hand: #11,982. They couldn't beat it, but in the process of trying, they proved the viability of an idea that would later be refined with crowdsourcing models like Amazon's Mechanical Turk."
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MrSeb writes
"German scientists at the Max Planck Institute of Quantum Optics have created the first 'universal quantum network' that could be feasibly scaled up to become a quantum internet. So far their quantum network only spans two labs spaced 21 meters apart, but the scientists stress that longer distances and multiple nodes are possible. The network's construction is ingenious: Each node is represented by a single rubidium atom, trapped inside a reflective optical cavity. These atoms communicate with each other by emitting a single photon over an optical fiber. Each atom is a quantum bit — a qubit — and the polarization of the photon emitted carries the quantum state of the qubit. The receiving qubit absorbs the photon and takes on the quantum state of the transmitter. Voila: A network of qubits that can send, receive, and store quantum information. In another, probably more exciting test, the emitted photons were actually used to entangle the rubidium atoms."
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Hugh Pickens writes
"About 65 million years ago, Earth was struck by an asteroid some 10 km in diameter with a mass of well over a trillion tonnes that created megatsunamis, global wildfires ignited by giant clouds of superheated ash, and the mass extinction of land-based life on Earth. Now astrobiologists have begun to study a less well known consequence: the ejection of billions of tons of life-bearing rocks and water into space that has made its way not just to other planets but other solar systems as well. Calculations by Tetsuya Hara and his colleagues at Kyoto Sangyo University in Japan show that a surprisingly large amount of life-bearing material ended up not on the Moon and Mars, as might be expected, but the Jovian moon Europa and the Saturnian moon Enceladus also received tons of life-bearing rock from earth. Even more amazingly, calculations suggest that most Earth ejecta ended up in interstellar space and some has probably already arrived at Earth-like exoplanets orbiting other stars. Hara estimates that about a thousand Earth-rocks from this event would have made the trip to Gliese 581, a red dwarf some 20 light years away that is thought to have a super-Earth orbiting at the edge of the habitable zone, taking about a million years to reach its destination. Of course, nobody knows if microbes can survive that kind of journey or even the shorter trips to Europa and Enceladus. But Hara says that if microbes can survive that kind of journey, they ought to flourish on a super-Earth in the habitable zone (PDF). 'If we consider the possibility that the fragmented ejecta (smaller than 1cm) are accreted to comets and other icy bodies, then buried fertile material could make the interstellar journey throughout the Galaxy,' writes Hara. 'Under these circumstances fragments could continue the interstellar journey and Earth origin meteorites could be transferred to Gl 581 system. If we take it as viable, we should consider the panspermia theories more seriously.'"
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sciencehabit writes in with a link about a group of students who have come up with
an interesting idea about how to fill potholes.
"Non-Newtonian fluids are the stars of high school science demonstrations. In one example, an ooey-gooey batter made from corn starch and water oozes like a liquid when moved slowly. But punch it, or run across a giant puddle of it, and it becomes stiff like a solid. Now, a group of college students has figured out a new use for the strange stuff: filler for potholes."
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coondoggie writes
"When it comes to stirring the brains of genius, a good competition can bring forward some really great ideas. That's the driving notion behind myriad public competitions, or challenges, as they are often labeled, that will take place in the near future sponsored by the U.S. government. The competitions are increasing by design as part of the $45 billion America Competes Act renewed by Congress last year that gave every federal department and agency the authority to conduct prize competitions, according to the White House's Office of Science and Technology Policy."
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samazon writes
"Ph.D. students at Trinity College in Dublin have constructed an artificial neural network model to demonstrate the Machiavellian intelligence theory — that human intelligence evolved based on the need for social teamwork and indexing a variety of social relationships and statuses. (Abstract) The experiment involved programming a base group of 50 simulated 'brains' which were required to participate one of two classical game theory dilemmas — the Prisoner's Dilemma or the Snowdrift game. Upon completion of either game, each 'brain' produced 'offspring' asexually, with 'brains' that made more advantageous choices during the games programmed to have a better chance to reproduce. A potential random mutation during each generation changed the 'brain's structure, number of neurons, or the strengths of the connections between those neurons,' simulating the evolution of the social brain. After 50,000 generations, the model showed that as cooperation increased, so did the intelligence of the programmed brains."
The
full paper is available.
