mhore writes "Researchers at the University of Pennsylvania have created the first all optical, nanowire-based NAND gate, which paves the way towards photonic devices that manipulate light to perform computations. From the release: 'The research team began by precisely cutting a gap into a nanowire. They then pumped enough energy into the first nanowire segment that it began to emit laser light from its end and through the gap. Because the researchers started with a single nanowire, the two segment ends were perfectly matched, allowing the second segment to efficiently absorb and transmit the light down its length.' The gate works by shining light on the nanowire structure to turn on and off information transported through the wire. The research appeared this month in Nature Nanotechnology (abstract)."

mbone writes "A very interesting paper (PDF) has just hit the streets (or, at least, Physics Review Letters) about the Heisenberg uncertainty relationship as it was originally formulated about measurements. The researchers find that they can exceed the uncertainty limit in measurements (although the uncertainty limit in quantum states is still followed, so the foundations of quantum mechanics still appear to be sound.) This is really an attack on quantum entanglement (the correlations imposed between two related particles), and so may have immediate applications in cracking quantum cryptography systems. It may also be easier to read quantum communications without being detected than people originally thought."

An anonymous reader writes "Election Analytics is a website developed by Dr. Sheldon Jacobson at the University of Illinois designed to predict the outcomes of the U.S. presidential and senatorial elections, based on reported polling data. From the site: 'The mathematical model employs Bayesian estimators that use available state poll results (at present, this is being taken from Rasmussen, Survey USA, and Quinnipiac, among others) to determine the probability that each presidential candidate will win each of the states (or the probability that each political party will win the Senate race in each state). These state-by-state probabilities are then used in a dynamic programming algorithm to determine a probability distribution for the number of Electoral College votes that each candidate will win in the 2012 presidential election. In the case of the Senate races, the individual state probabilities are used to determine the number of seats that each party will control.'" You can tweak the site by selecting a skew toward the Republican or Democratic tickets, and whether it's mild or strong. Right now, this tool shows the odds favor another four years for Obama, even with a strong swing for the Republicans.

An anonymous reader writes "Sunnyvale, California is a town 40 miles outside of San Francisco, in the Bay Area. As in most of California, the weather is mild, and the winters are short, even sometimes warm. On December 20, Sara Alvarez took her youngest child for a walk in the park in town. As daylight faded, Alvarez lost feeling in her right leg, then her left foot. Her body became numb, and she became weak. At 10:15 pm, her husband drove her to a hospital in Redwood City, about 20 minutes away from their town. There, over the course of Christmas, doctors batted around diagnoses: tumor, cancer. Finally, Alvarez received a brain scan that revealed the truth: neurocysticercosis, a calcified tapeworm in her brain (link contains images of brain surgery)."

New submitter GregLaden writes "The object known as the Galileo Thermometer is a vertical glass tube filled with a liquid in which are suspended a number of weighted glass balls. As the temperature of the liquid changes, so does the density. Since each glass ball is set to float at equilibrium in a sightly different density of the liquid, as the temperature increases, each glass ball sinks to the bottom. It turns out that this thermometer was actually invented by a team of instrument inventors that formed a scientific society who had the impressive motto 'Probando e Reprobando,' which in English means 'testing and retesting.' The Accademia del Cimento operated under the leadership of the Grand Duke Ferdinand II from 1657-1667 in Florence, Italy. According to Peter Loyson, who has written a corrective article for the Journal of Chemical Education, Galileo did invent a temperature measuring device called a thermoscope."

Layzej writes "New research (PDF) to be published in a forthcoming issue of Psychological Science has found that those who subscribed to one or more conspiracy theories or who strongly supported a free market economy were more likely to reject the findings from climate science as well as other sciences. The researchers, led by UWA School of Psychology Professor Stephan Lewandowsky, found that free-market ideology was an overwhelmingly strong determinant of the rejection of climate science. It also predicted the rejection of the link between tobacco and lung cancer and between HIV and AIDS. Conspiratorial thinking was a lesser but still significant determinant of the rejection of all scientific propositions examined, from climate to lung cancer. Curiously, public response to the paper has provided a perfect real-life illustration of the very cognitive processes at the center of the research."

SpuriousLogic points out an article at Wired discussing research into pressure levels inside Mt. Fuji's magma chamber, which scientists claim is higher than it was in 1707, the last time it erupted. "The new readings, taken by the National Research Institute for Earth Science and Disaster Prevention, reveal that the pressure is at 1.6 megapascals, nearly 16 times the 0.1 megapascals it takes to trigger an eruption." A series of earthquakes shook the area around Mt. Fuji a little over a decade ago, and a fault line was discovered underneath it. "Since the March 2011 tsunami and the 6.4 magnitude earthquake that followed four days later, Japan has been on tenterhooks, and in May 2012 a professor from Ryukyu University warned that a massive eruption within three years would be likely because of several major factors: steam and gases are being emitted from the crater, water eruptions are occurring nearby, massive holes emitting hot natural gases are appearing in the vicinity." While the rising pressure within the magma chamber is of concern, it is but one factor among many that lead to eruptions.

An anonymous reader sends this excerpt from Transportation Nation: "Retired space shuttles are being readied for museums, but there's one piece of equipment at the Kennedy Space Center that dates back to before the moon landing and it's not going anywhere. NASA's giant crawler transporter is the only machine with enough muscle to move Apollo rockets and space shuttles out to the launch pad, and after nearly 50 years on the job the agency's decided there's still no better way to transport heavy loads. It's about as wide as a six lane highway, higher than a two story building, with huge caterpillar treads at each of its four corners. ... Crawler two is being upgraded from its current lifting capacity of 12 million pounds — the combined weight of the shuttle and mobile launcher — to 18 million pounds, for NASA’s new heavy lift rocket."

ananyo writes "South Korea's government has urged textbook publishers to ignore calls to remove two examples of evolution from high-school textbooks. The move marks a change of heart for the government, which had earlier forwarded a petition from the 'Society for Textbook Revise' to publishers and told them to make their own minds up about the demands. The petition called for details about the evolution of the horse and of the avian ancestor Archaeopteryx to be removed from the books. In May, news emerged that publishers were planning to drop the offending sections, sparking outrage among some scientists. The resulting furor prompted the government to set up an 11-member panel, led by the Korean Academy of Science and Technology. On 5 September, the panel concluded that Archaeopteryx must be included in Korean science textbooks. And, while accepting that the textbooks' explanation of the evolution of the horse was too simplistic, the panel said the entry should be revised rather than removed or replaced with a different example, such as the evolution of whales."

Titus Andronicus writes "Angela Fritz and Jeff Masters of Weather Underground analyze this year's record ongoing Arctic ice melt. Arctic sea ice extent, area, and volume are all at record lows for the post-1979 satellite era. The ice is expected to continue melting for perhaps another couple of weeks. Extreme sea ice melting might help cause greater numbers of more powerful Arctic storms, help to accelerate the melting of the Greenland ice sheet, and help to accelerate global warming itself, due to the increased absorption of solar energy into the ocean."

ananyo writes "A rare, hereditary form of autism has been found — and it may be treatable with protein supplements. Genome sequencing of six children with autism has revealed mutations in a gene that stops several essential amino acids being depleted. Mice lacking this gene developed neurological problems related to autism that were reversed by dietary changes (abstract). According to Joseph Gleeson, a child neurologist at the University of California, San Diego, who led the study, 'This might represent the first treatable form of autism.' It is possible that some other forms of autism may also be linked to uncommon metabolic disorders — and so treatable through dietary changes, according to the scientists quoted in the piece."

SchrodingerZ writes "Researchers at the University of Central Florida have created the shortest laser pulse ever recorded, lasting only 67 attoseconds. An attosecond is a mere quintillionith of a single second (1/1,000,000,000,000,000,000). The record-breaking project was run by UCF Professor Zenghu Chang, using an extreme ultraviolet laser pulse. '"Dr. Chang's success in making ever-shorter light pulses helps open a new door to a previously hidden world, where we can watch electrons move in atoms and molecules, and follow chemical reactions as they take place," said Michael Johnson, the dean of the UCF College of Sciences and a physicist.' Its hoped that these short laser blasts will pave the way to better understand quantum mechanics in ways we have never before witnessed. In 2008 the previous record was set at 80 attoseconds, the pulse created at the Max Planck Institute in Garching, Germany."

sciencewatcher writes "In an attempt to solve a rape and murder of a 16-year-old girl, the Dutch police have asked 8080 men to provide their DNA. All these people lived 5 km or less from the crime scene at the time of the murder. This reopened cold case is the first large-scale attempt not to hunt the rapist and killer but to locate his close or distant male relatives. All data gathered will be destroyed after the match with this particular murder. There seems to be great public support for this attempt." Shades of The Blooding.

SchrodingerZ writes "Scientists from around the world have collaborated to achieve quantum teleportation over 143 kilometers in free space. Quantum information was sent between the Canary Islands of La Palma and Tenerife. Quantum teleportation is not how it is made out in Star Trek, though. Instead of sending an object (in this case a photon) from one location to another; the information of its quantum state is sent, making a photon on the other end look identical to the original. 'Teleportation across 143 kilometres is a crucial milestone in this research, since that is roughly the minimum distance between the ground and orbiting satellites.' It is the hope of the research team that this experiment will lead to commercial use of quantum teleportation to interact with satellites and ground stations. This will increase the efficiency of satellite communication and help with the expansion of quantum internet usage. The full paper on the experiment can be found [note: abstract only, full article paywalled] in the journal Nature."

DevotedSkeptic writes in with a story about the work going into feeding astronauts on a mission to Mars. "The menu must sustain a group of six to eight astronauts, keep them healthy and happy and also offer a broad array of food. That's no simple feat considering it will likely take six months to get to the Red Planet, astronauts will have to stay there 18 months and then it will take another six months to return to Earth. Imagine having to shop for a family's three-year supply of groceries all at once and having enough meals planned in advance for that length of time. 'Mars is different just because it's so far away,' said Maya Cooper, a senior research scientist with Lockheed Martin who is leading the efforts to build the menu. 'We don't have the option to send a vehicle every six months and send more food as we do for the International Space Station.'"

Hugh Pickens writes "Denise Chow reports that two spacewalking astronauts successfully replaced a vital power unit on the International Space Station today, defeating a stubborn bolt that prevented the astronauts from properly installing the power unit on the ISS's backbone-like truss with the help of some improvised tools made of spare parts and a toothbrush. Astronauts Sunita Williams and Akihiko Hoshide started by removing the power box, called a main bus switching unit (MBSU), from where it had been temporarily tied down with a tether, then spent several hours troubleshooting the unit and the two bolts that are designed to secure it in place on the space station's truss. After undoing the bolts, the spacewalkers examined them for possible damage, and used improvised cleaning tools and a pressurized can of nitrogen gas to clean out the metal shavings from the bolt receptacles. 'I see a lot of metal shavings coming out,' Hoshide said as he maneuvered a wire cleaner around one of the bolt holders. Williams and Hoshide then lubricated a spare bolt and manually threaded it into the place where the real bolt was eventually driven, in an effort to ensure that the receptacle was clear of any debris. Then the two applied grease to the sticky bolt as well as extra pressure and plain old jiggling until finally 4½ hours into the spacewalk, Hoshide reported: 'It is locked.' When Hoshide reported that the troublesome bolt was finally locked into place, the flight managers erupted in applause while astronaut Jack Fischer at Mission Control told the astronauts 'that is a little slice of awesome pie.'"

An anonymous reader sends this depressing excerpt from New Scientist: "A serious blow to science-based medical practices has been dealt in the UK with the appointment of Jeremy Hunt as Health Secretary. The fortunes of the UK's National Health Service (NHS) are about to be transformed with the help of the magical waters of homeopathic medicine. Top marks to The Telegraph's science writer Tom Chivers for quickly picking up on talk that the UK's new health minister, Jeremy Hunt – who replaced Andrew Lansley yesterday in a government reshuffle – thinks that homeopathy works, and should be provided at public expense by the NHS."

astroengine writes "The light-years between the stars is vast — a seemingly insurmountable quarantine that cuts our solar system off from the rest of the galaxy. But to a growing number of interstellar enthusiasts who will meet in Houston, Texas, for the 100YSS Public Symposium next week, interstellar distances may not be as insurmountable as they seem. What's more, they even have the support of former U.S. President Bill Clinton."

ananyo writes "In what is likely to be a historic moment in science, ENCODE, the Encyclopedia of DNA Elements, has published 30 papers in Nature, Genome Research and Genome Biology today, assigning some sort of function to roughly 80% of the genome, including more than 70,000 'promoter' regions — the sites, just upstream of genes, where proteins bind to control gene expression — and nearly 400,000 'enhancer' regions that regulate expression of distant genes. The project was designed to pick up where the Human Genome Project left off. Although that massive effort revealed the blueprint of human biology, it quickly became clear that the instruction manual for reading the blueprint was sketchy at best. Researchers could identify in its 3 billion letters many of the regions that code for proteins, but those make up little more than 1% of the genome, contained in around 20,000 genes. ENCODE, which started in 2003, aims to catalog the 'functional' DNA sequences between genes, learn when and in which cells they are active and trace their effects on how the genome is packaged, regulated and read. Nature has set up an ENCODE site with an explorer, that groups the papers by topic, and collects all the papers, which are available free."

DevotedSkeptic sends this excerpt from NASA: "A NASA-sponsored expedition is set to sail to the North Atlantic's saltiest spot to get a detailed, 3-D picture of how salt content fluctuates in the ocean's upper layers and how these variations are related to shifts in rainfall patterns around the planet. The research voyage is part of a multi-year mission, dubbed the Salinity Processes in the Upper Ocean Regional Study (SPURS), which will deploy multiple instruments in different regions of the ocean. ... They will return with new data to aid in understanding one of the most worrisome effects of climate change — the acceleration of Earth's water cycle. As global temperatures go up, evaporation increases, altering the frequency, strength, and distribution of rainfall around the planet, with far-reaching implications for life on Earth."