coondoggie writes "What kind of network can support future commercial and government space trips around Earth and support bigger distances to the moon and Mars? NASA is in the process of exploring exactly what technology will be needed beyond 2022 in particular to support future space communication and navigation. The agency recently issued a Request for Information (RFI) to begin planning for such a new architecture."
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The Bad Astronomer writes "Astronomers have found the third-closest star system to the Earth: called WISE 1049-5319, it's a binary brown dwarf system just 6.5 light years away. Brown dwarfs are faint, low mass objects 13 — 75 times the mass of Jupiter, and are so dim they are very difficult to detect. These newly-found nearby objects were seen in observations from 1978 but went unnoticed at the time, but since that date the large apparent motion of the binary made their proximity obvious. Only two star systems are closer: Alpha Centauri (4.3 light years) and Barnard's star (6 light years)."
A while ago you had the chance to ask paleontologist Dr. Robert Bakker a wide variety of questions. Instead of answering them individually, Dr. Bob decided to write a lengthy piece that covers most of your inquiries, and includes personal stories and some of his philosophy. The first part is a narrative about his childhood conversion to fossil studies and how his paleo-CSI approach developed. We'll post the second half, covering his training in the history of theology and how it intersects with his science, tomorrow.
sciencehabit writes "When an adult loses a tooth, there's no hope of growing a new one—unless you've got a mouse kidney handy. In a new study, researchers injected human gum tissue extracted during oral surgery into the molars of fetal mice. After giving the cells a week to get used to each other, the scientists implanted the chimeric concoction into the protective tissue surrounding the kidneys of living mice. There, 20% of the cells developed into objects recognizable as teeth, complete with the root structures missing from artificial tooth implants. The next step is to transplant these so-called 'bio-teeth' back into human mouths and see if they grow into something that we can chew on—or rather, with."
hypnosec writes "A Team of researchers and engineers at California Institute of Technology (Caltech) has developed 'self-healing' chips (PDF) that can heal themselves within a few microseconds. The team tested their work by damaging amplifiers in several places using high-powered lasers. In less than a second the chips were able to develop work-arounds thereby healing themselves."
New submitter ceview writes "NASA has released its latest green data showing a creeping of green towards the northern hemisphere. From the article: 'Results show temperature and vegetation growth at northern latitudes now resemble those found 4 degrees to 6 degrees of latitude farther south as recently as 1982.'"
Nerval's Lobster writes "Former vice president Al Gore sat down with Wall Street Journal columnist Walt Mossberg at this year's SXSW conference to talk about the future — specifically, what Gore sees as the dangers and opportunities awaiting the planet for the next few years. Gore drilled down into what he referred to as the "stalker economy." The rise of apps such as SnapChat, which allows smartphone users to control how long friends can view messages, is emblematic of people reaching the "gag point" with pervasive recording and surveillance by government and business. "Our democracy has been hacked," Gore also told his audience, referring to the U.S. Constitution as "our operating system." While there's never been a "golden age" of American Democracy, he added, the perils emerging today are new. "If a Congressman or Senator has to spend five hours a day begging special interests or rich people for money," he said, they'll be more concerned about how what they're saying will appeal to those interests—rather than their constituents. In yet another tangent, Gore railed against genetic engineering, including Spider Goats, which are goats with spliced spider DNA that allows them to secrete spider silk along with their milk. The goats breed, extending that trait to future generations. Gore sees such things as a case of science run amok, alternately creepy and scary."
jjoelc writes "Being one of those 'suffering' through the time change last night, the optimist in me reminded me that it could be much worse. That's when I started wondering how many different time/date standards there really are. Wikipedia is a good starting point, but is sorely lacking in the various formats used by e.g. Unix, Windows, TRS-80, etc. And that is without even getting into the various calendars that have been in and out of use throughout the ages. So how about it? How many different time/date 'standards' can we come up with? I'm betting there are more than a few horror stories of having to translate between them..."
Nerval's Lobster writes "Elon Musk, CEO of SpaceX and Tesla Motors, took the keynote stage at this year's SXSW to talk about everything from space exploration to electric cars. Joining him onstage to ask questions was Chris Anderson, the former Wired editor and co-founder of 3DRobotics. Musk used his keynote discussion to show off a video of a rocket test, which he said had taken place earlier that week. In the video, a ten-story rocket takes off from a launching pad and hovers several hundred feet in the air before landing in the same spot, upright. It's an early test of SpaceX's reusable-rocket project. 'Reusability is extremely important,' Musk told the audience. 'If you think it's important that humanity extends beyond Earth and becomes a multitenant species' then reusable rockets will prove essential. Musk also talked about the recent controversy involving his Tesla Motors, which started when a New York Times reporter claimed in a much-circulated column that his electric-powered Model S sedan had ground to a halt during a test drive up the East Coast. 'I have no problem with negative feedback,' he told Anderson, in response to the latter's question. 'There have been hundreds of negative articles, and yet I've only spoken out a few times. I don't have a problem with critical reviews, I have a problem with false reviews.'"
astroengine writes "Decades of searching and a 7.5 billion Euro particle accelerator later, why is everyone so down on one of the biggest discoveries of the century? Well, as the evidence strengthens for a bona fide signal of a 'Standard Model' Higgs boson with a mass of 125 GeV, many scientists are disappointed that the discovery of an 'ordinary' — or 'vanilla' according to Caltech cosmologist Sean Carroll — Higgs removes any doubt for more exotic physics beyond the Standard Model. It's a strange juxtaposition; a profound discovery that's also an anticlimax. But to confirm the identity of the Higgs candidate, LHC physicists still need to measure the particle's spin. 'Until we can confidently tie down the particle's spin,' said CERN Research Director Sergio Bertolucci at this week's Rencontres de Moriond conference in Italy, 'the particle will remain Higgs-like. Only when we know that is has spin-zero will we be able to call it a Higgs.'"
gentryx writes "Newly found evidence supports earlier claims that Gustave Whitehead (a German immigrant, born Gustav Weißkopf, with Whitehead being the literal translation of Weißkopf) performed the first powered, controlled, heavier-than-air flight as early as 1901-08-14 — more than two years before the Wrights took off. A reconstructed image shows him mid-flight. A detailed analysis of said photo can be found here. Apparently the results are convincing enough that even Jane's chimes in. His plane is also better looking than the Wright Flyer I." (And when it comes to displacing the Wright brothers, don't forget Alberto Santos Dumont.)
Hugh Pickens writes writes "Discover Magazine reports that Hugo Chavez will apparently get an embalming job designed to keep him looking alive for decades similar to that of Russia's Vladimir Lenin, whose body still lies in a mausoleum in Moscow's Red Square, nearly 90 years after his death. So how do you preserve a human body for decades without it turning into a pile of melted tissue? First, get to work quickly. Upon death, the human body starts decomposing immediately. The way to stop it is with formaldehyde, a preservative used for the past century, which inhibits the enzyme decomposition as well as killing bacteria. 'You pump the chemical in, and as the formaldehyde hits the cells of the body, it firms up the protein of the cell, or fixates it,' says Vernie Fountain, head of the Fountain National Academy of Professional Embalming Skills in Springfield, Mo. 'That's what makes them stiff.' With a body that will have to be on display for years, it's likely to require a top-shelf, super-strong solution. 'If I were doing Hugo Chavez, I would strengthen the solution and use more preservative product,' says Fountain. Next, get a good moisturizer. Formaldehyde preserves, but it also dries out the body. Vaseline or other moisturizers can preserve the look of skin, according to Melissa Johnson Williams, executive director of the American Society of Embalmers. Finally keep cool. Heat decomposes a body so for long term preservation, the body has to be kept at the temperature of a standard kitchen refrigerator, somewhere in the mid-40s. Lastly, if Venezuelans really want to keep Hugo Chavez around forever, like many other world figures, there's only one solution that works, according to Fountain. 'The best form of preservation is mummification.'"
sciencehabit writes "It's the sort of abstract puzzle that keeps a scientist awake at night: Can you predict how three objects will orbit each other in a repeating pattern? In the 300 years since this 'three-body problem' was first recognized, just three families of solutions have been found. Now, two physicists have discovered 13 new families. It's quite a feat in mathematical physics, and it could conceivably help astrophysicists understand new planetary systems." The paper is available at arxiv.
theodp writes "When it comes to tales of fake girlfriends, Manti Te'o can't hold a candle to theoretical particle physicist Paul Frampton. In November 2011, writes the NY Times' Maxine Swann in 'The Professor, the Bikini Model and the Suitcase Full of Trouble,' Frampton met who he says he thought was Czech bikini model Denise Milani on Mate1.com. A Yahoo Messenger romance bloomed, at least in the 68-year-old Frampton's mind (Frampton's ex-wife was a self-described 'physics groupie'). But before starting their perfect life together, fake Denise asked Frampton for one little favor — would he be so kind as to bring her a bag that she had left in La Paz, Bolivia? Yep, bad idea. The UNC Louis D. Rubin, Jr. Distinguished Professor of Physics and Astronomy soon found himself in a Buenos Aries prison, charged with transporting two kilos of cocaine into Argentina. Currently serving a four years and eight months sentence under house arrest, Frampton reportedly continues to supervise his two current PhD students by phone, and still finds time to post to the Physics archive."
New submitter phenopticon writes with this nugget from an intriguing piece at Gamasutra that adds another voice to the slow-burn debate on the psychological effects of video games: "For nearly thirty years we've been having this discussion, asking the question: do violent movies, music or video games make people violent? Well according to Brad Bushman and Craig Anderson of Iowa State University, yes. Based on the results of their research they concluded in 2001 that video games and violent media can make people aggressive and violent. Based upon their data and their conclusions, however, it's safe to say that photos of snakes, crispy bacon, or a particularly rigorous game of chess can also make people aggressive and violent."
dcblogs writes "The number of new undergraduate computing majors in U.S. computer science departments increased more than 29% last year, a pace called 'astonishing' by the Computing Research Association. The increase was the fifth straight annual computer science enrollment gain, according to the CRA's annual survey of computer science departments at Ph.D.-granting institutions. The survey also found that more students are earning a Ph.D., with 1,929 degrees granted — an 8.2% increase over the prior year. The pool of undergraduate students represented in the CRA survey is 67,850. Of that number, 57,500 are in computer science."
sciencehabit writes "The National Science Foundation (NSF) is investigating nearly 100 cases of suspected plagiarism drawn from a single year's worth of proposals funded by the agency. The cases grow out of an internal examination by NSF's Office of Inspector General (IG) of every proposal that NSF funded in fiscal year 2011. James Kroll, head of administrative investigations within the IG's office, tells ScienceInsider that applying plagiarism software to NSF's entire portfolio of some 8000 awards made that year resulted in a 'hit rate' of 1% to 1.5%. 'My group is now swamped,' he says about his staff of six investigators."
redletterdave writes "An un-named male patient in the U.S. has had 75 percent of his skull replaced with 3D printed materials. The undisclosed patient had his head imaged by a 3D scanner before South Windsor, Conn.-based Oxford Performance Materials (OPM) gained approval from US regulators to print the bone replacement. OPM's final skull replacement was built within two weeks, and inserted in the patient's skull in an operation performed earlier this week; this cutting-edge procedure was only just revealed on Friday. OPM's 3D-printed process was granted approval by the FDA back on Feb. 18, which means the company can now provide 3D printed replacements for bones damaged by trauma or even disease. The company says this technique could benefit more than 500 U.S. citizens each month, from injured factory or construction workers to wounded soldiers."
sciencehabit writes "After a long day buzzing between flowers, even the most industrious worker bee could use a little help remembering which ones she wants to return to the next day. Some plants have a trick to ensure they end up at the top of the list: caffeinated nectar. A team of researchers bombarded honey bees with floral smells paired with sugary rewards, some of which contained the same levels of caffeine found in the nectar of coffee and citrus flowers. Three times as many bees remembered the odors associated with caffeine after 24 hours, when compared with the scents associated with sugar alone (abstract). When the researchers applied the stimulant directly to honey bee brains, it had a positive effect on the neurons associated with the formation of long term memories. Now, they want to see if bees go out of their way to feed on caffeinated nectar, perhaps even ignoring predators to do so—behavior that, if observed, could shed light on the neurological processes behind addiction."
derekmead writes "Dolly's mere existence was profound. It was also unusually short, at just six years. But scientists in Japan announced yesterday they have succeeded in cloning mice using the same technique that created Dolly with more or less perfect results: The mice are healthy, they live just as long as regular mice, and they've been flawlessly cloned and recloned from the same source to the 25th generation. Researchers claim it's the first example of seamless, repeat cloning using the Dolly method—known as "somatic cell nuclear transfer" (SCNT)—in which the nucleus from an adult source animal is transferred to an egg with its nucleus removed. Until recently, the process was fraught with failures and mutations. But the team led by Teruhiko Wakayama, whose results were published today in the journal Cell Stem Cell, was able to create 581 clones from the same original mouse. Scientists, including Dolly's creator, have long felt the process was still too unstable—and too wasteful of precious eggs, given the failure rate—to be used on humans any time soon. But perhaps it's not so far off, after all."
ananyo writes "Global average temperatures are now higher than they have been for about 75% of the past 11,300 years, a study published in Science suggests. Researchers have reconstructed global climate trends all the way back to when the Northern Hemisphere was emerging from the most recent ice age. They looked at 73 overlapping temperature records including sediment cores drilled from lake bottoms and sea floors around the world, and ice cores collected in Antarctica and Greenland. For some records, the researchers inferred past temperatures from the ratio of magnesium and calcium ions in the shells of microscopic creatures that had died and dropped to the ocean floor; for others, they measured the lengths of long-chain organic molecules called alkenones that were trapped in the sediments. From the first decade of the twentieth century to now, global average temperatures rose from near their coldest point since the ice age to nearly their warmest, they report (abstract)."
Lucas123 writes "While electronic medical records (EMR) may contain your health information, most physicians think you should only be able to add information to them, not get access to all of the contents. A survey released this week of 3,700 physicians in eight countries found that only 31% of them believe patients should have full access to their medical record; 65% believe patients should have only limited access. Four percent said patients should have no access at all. The findings were consistent among doctors surveyed in eight countries: Australia, Canada, England, France, Germany, Singapore, Spain and the United States."
astroengine writes "Relatively recently, water blasted out from an underground aquifer on Mars, carving out deep flood channels in the surface that were later buried by lava flows, radar images complied from NASA's Mars Reconnaissance Orbiter probe shows. The channels are at least twice as deep as previous estimates for Marte Vallis, an expanse of plains just north of the Martian equator that is the youngest volcanic region on the planet. "We see similar channels elsewhere on Mars and they are not filled with lava so it's important to be able to compare different channel systems, and also similar systems on Earth, to give us clues about how they formed," lead researcher Gareth Morgan, with the Smithsonian Institution in Washington DC, told Discovery News."
New submitter rujholla writes "The race to the moon is back! This time, though, it's through private enterprise. Google has offered a $20m grand prize to the first privately-funded company to land a robot on the moon and explore the surface (video) by moving at least 500 meters and sending high definition video back to Earth by 2015."
RocketAcademy writes "The Lone Star State is moving to become a leader in spaceport development. The Houston Airport System is officially moving ahead with plans to turn Ellington Airport, near NASA's Johnson Space Center, into an FAA-licensed commercial spaceport. The airport system has completed a feasibility study for turning the field into a spaceport for suborbital spacecraft such as Virgin Galactic's SpaceShip Two and XCOR's Lynx. In the longer term, spacecraft could link Houston to Singapore in as little as three hours, according to airport system director Mario Diaz. Meanwhile, state Representative Rene Oliveira (D-Brownsville) introduced a bill that would allow county commissioners to close a local beach for launches from the proposed SpaceX launch site in Cameron County. The bill is part of a flood of spaceport-related legislation that has been introduced recently in the Texas legislature."
astroengine writes "Finding things like amino acids in space directly is a difficult business. So, instead of finding them directly, a team using West Virginia's Green Bank Telescope, led by Anthony Remijan, discovered two other molecules – cyanomethanimine and ethanamine — both of which are precursor molecules. In other words, these molecules are the early steps in the chain of chemical reactions that go on to make the stuff of life. The researchers found these molecules near the center of the Milky Way inside a hulking interstellar cloud known as Sagittarius B2 (Sgr B2), spanning 150 light-years in size, up to 40 times as dense as any other cloud the Milky Way has to offer."
tverbeek writes "Russian scientists believe they have found a new type of bacteria in the sub-glacial Lake Vostok. From the article: 'The samples obtained from the underground lake in May 2012 contained a bacteria which bore no resemblance to existing types, said Sergei Bulat of the genetics laboratory at the Saint Petersburg Institute of Nuclear Physics. "After putting aside all possible elements of contamination, DNA was found that did not coincide with any of the well-known types in the global database," he said. "We are calling this life form unclassified and unidentified," he added.'"
An anonymous reader writes "In as little as a few days, the British-made Surrey Training, Research, and Nanosatellite Demonstrator (STRaND-1) satellite will begin transitioning its key systems over to a completely stock Android Nexus One smartphone that's been bolted to the bottom of it. The mission is designed to test the endurance of off-the-shelf consumer hardware, and to validate Android as a viable platform for controlling low-cost spacecraft. STRaND-1 managed to beat NASA's own 'PhoneSat' mission to the punch, which will see a Nexus One and Nexus S launched into space aboard the April test flight of the Orbital Sciences Antares commercial launch vehicle, the prime competitor to SpaceX's Falcon 9."
sciencehabit writes "Pharmaceuticals often have side effects that go unnoticed until they're already available to the public. Doctors and even the FDA have a hard time predicting what drug combinations will lead to serious problems. But thanks to people scouring the web for the side effects of the drugs they're taking, researchers have now shown that Google and other search engines can be mined for dangerous drug combinations. In a new study, scientists tried the approach out on predicting hypoglycemia, or low blood sugar. They found that the data-mining procedure correctly predicted whether a drug combo did or did not cause hypoglycemia about 81% of the time."
sciencehabit writes "In 1592, a British ship sank near the island of Alderney in the English Channel carrying an odd piece of cargo: a small, angular crystal. Once it was brought back to land, a few European scientists began to suspect the mysterious object might be a calcite crystal, a powerful 'sunstone' referred to in Norse legends which they believe Vikings and other European seafarers used to navigate before the introduction of the magnetic compass. Now, after subjecting the object to a battery of mechanical and chemical tests, the team has determined that the Alderman crystal is indeed a calcite and, therefore, could have been the ship's optical compass. Today, similar calcite crystals are used by astronomers to analyze the atmospheres of exoplanets—perhaps setting the stage for a whole new age of exploration."
tcd004 writes "An article at PBS begins, 'Imagine this crazy scenario: A space vehicle we've sent to a distant planet to search for life touches down in an icy area. The heat from the spacecraft's internal power system warms the ice, and water forms below the landing gear of the craft. And on the landing gear is something found on every surface on planet Earth... bacteria. Lots of them. If those spore-forming bacteria found themselves in a moist environment with a temperature range they could tolerate, they might just make themselves at home and thrive and then, well... the extraterrestrial life that we'd been searching for might just turn out to be Earth life we introduced.' The article goes on to talk about NASA's efforts to prevent situations like this. It's a job for the Office of Planetary Protection. They give some examples, including the procedure for sterilizing the Curiosity Rover: 'Pieces of equipment that could tolerate high heat were subjected to temperatures of 230 to 295 degrees Fahrenheit for up to 144 hours. And surfaces were wiped down with alcohol and tested regularly.'"
ananyo writes "The incidence of autoimmune diseases, such as multiple sclerosis and type 1 diabetes, has spiked in developed countries in recent decades. In three studies published today, researchers describe the molecular pathways that can lead to autoimmune disease and identify one possible culprit that has been right under our noses — and on our tables — the entire time: salt. Some forms of autoimmunity have been linked to overproduction of TH17 cells, a type of helper T cell that produces an inflammatory protein called interleukin-17. Now scientists have found sodium chloride turns on the production of these cells (abstract). They also showed that in a mouse model of multiple sclerosis, a high-salt diet accelerated the disease's progression (abstract)."
Trapezium Artist writes "The European Space Agency's far-infrared space observatory, Herschel, will soon run out of its liquid helium coolant, ending observations after more than three years of highly successful scientific operations. Predictions by ESA engineers are that Herschel will run out of helium later in March, at which point its instruments will warm up, rendering them effectively blind. Herschel was launched in 2009 along with ESA's Planck satellite to the Sun-Earth L2 point, roughly 1.5 million kilometers from Earth. At that location, the Sun and Earth remain along a more or less constant vector with respect to a spacecraft, meaning that it can cool to very low temperatures behind a sunshield. At such a large distance from Earth, however, there is no way of replenishing the coolant, and Herschel will be pushed off the L2 point to spend its retirement in a normal heliocentric orbit. With the largest monolithic mirror ever flown in space at 3.5 meters diameter and three powerful scientific instruments, Herschel has made exciting discoveries about the cool Universe, ranging from dusty starburst galaxies at high redshifts to star-forming regions spread throughout the Milky Way and proto-planetary disks of gas and dust swirling around nearby young stars. And with an archive full of data, much of it already public, Herschel is set to produce new results for years to come."
Kittenman writes "The BBC magazine has an article on human trust of robots. 'As manufacturers get ready to market robots for the home it has become essential for them to overcome the public's suspicion of them. But designing a robot that is fun to be with — as well as useful and safe — is quite difficult.' The article cites a poll done on Facebook over the 'best face' design for a robot that would be trusted. But we still distrust them in general. 'Eighty-eight per cent of respondents [to a different survey] agreed with the statement that robots are "necessary as they can do jobs that are too hard or dangerous for people," such as space exploration, warfare and manufacturing. But 60% thought that robots had no place in the care of children, elderly people and those with disabilities.' We distrust the robots because of the uncanny valley — or, as the article puts it, that they look unwell (or like corpses) and do not behave as expected. So, at what point will you trust robots for more personal tasks? How about one with the 'trusting face'?" It seems much more likely that a company will figure out sneaky ways to make us trust robots than make robots that much more trustworthy.
MTorrice writes "Some biologists would like to train patients' own immune systems to treat diseases such as cancer and autoimmune disorders. They envision isolating a person's immune cells and then programming the cells to destroy tumors or to stop other parts of the immune system from attacking healthy tissue. Now a team of German researchers reports a method that traps immune cells in microscopic water droplets and exposes the cells to chemical signals that could teach them the difference between friend and foe (abstract). The droplets mimic the cellular environments in which immune cells typically trade information about what to attack."
tetrahedrassface writes "Observations of spectral emissions from the surface of Europa using state of the art ground based telescopes here on Earth have lent data that indicate the surface of the Jovian moon is linked with the vast ocean below. The observations carried out by Caltech's Mike Brown and JPL's Kevin Hand show that water is making it from the ocean below all the way up to the surface of the moon. In their study (PDF) they noticed a dip in the emission bands around lower latitudes of the moon, and quickly honed in on what they were seeing. The mineral of interest is epsomite, a magnesium sulfate compound that can only come from the ocean below. From the article: 'Magnesium should not be on the surface of Europa unless it's coming from the ocean,' Brown says. 'So that means ocean water gets onto the surface, and stuff on the surface presumably gets into the ocean water.' Not only does this mean the ocean and surface are dynamically interacting, but it also means that there may be more energy in the ocean than previously thought. Another finding is that the ocean below the icy surface of Europa is basically very similar to an ocean on Earth, giving the neglected and premier solar body for life past Earth another compelling reason for being explored."
astroengine writes "The idea of slingshotting a manned spacecraft around Mars isn't a new one. In the 1960's, NASA carried out a feasibility study into an 800-day flyby mission to the Red Planet. And it would have been awesome. AT&T/Bellcomm mathematician A. A. VanderVeen was working for NASA in 1967 and came up with 5 possible launch opportunities between 1978 and 1986 — two windows in 1979 and 1983 provided the shortest transit time between the planets. But launch mass and fuel requirements were a constant issue. So VanderVeen turned to physics to find an elegant, and scientifically exciting, solution: add a Venus flyby to the Mars trip. Mars, Earth, and Venus align with the sun five times every 32 years, but Venus and Mars alignments happen more frequently making double (Earth-Venus-Mars-Earth) or even triple (Earth-Venus-Mars-Venus-Earth) flybys a viable mission. Unfortunately, the flyby never happened."
willith writes "I spent two days at NASA's Neutral Buoyancy Laboratory in Houston, watching astronauts dive and getting a thorough tour of the facility. The largest indoor pool in the world contains 6.2M gallons of water and is filled with life-size replicas of International Space Station modules (though at 202'x101' and 40' deep, it isn't nearly enough to hold the entire station). Every spacewalk requires a huge amount of rehearsal, and that rehearsal is done right here in this pool. I talk at length with divers, astronauts, test coordinators, and test directors about how the facility works and what it takes to train folks to work in spacesuits. I also get to talk about the NBL's commercial future, and what's next for the big pool. Plus, lots and lots of pictures!"
Hugh Pickens writes writes "Science Daily Headlines reports that researchers have applied a recently developed technique to directly measure the polarization states of light overcoming some important challenges of Heisenberg's famous Uncertainty Principle and demonstrating that it is possible to measure key related variables, known as 'conjugate' variables, of a quantum particle or state directly. Such direct measurements of the wave-function had long seemed impossible because of a key tenet of the uncertainty principle — the idea that certain properties of a quantum system could be known only poorly if certain other related properties were known with precision. 'The reason it wasn't thought possible to measure two conjugate variables directly was because measuring one would destroy the wave-function before the other one could be measured,' says co-author Jonathan Leach. The direct measurement technique employs a 'trick' to measure the first property in such a way that the system is not disturbed significantly and information about the second property can still be obtained. This careful measurement relies on the 'weak measurement' of the first property followed by a 'strong measurement' of the second property. First described 25 years ago, weak measurement requires that the coupling between the system and what is used to measure it be, as its name suggests, 'weak,' which means that the system is barely disturbed in the measurement process. The downside of this type of measurement is that a single measurement only provides a small amount of information, and to get an accurate readout, the process has to be repeated multiple times and the average taken. Researchers passed polarized light through two crystals of differing thicknesses: the first, a very thin crystal that 'weakly' measures the horizontal and vertical polarization state; the second, a much thicker crystal that 'strongly' measures the diagonal and anti-diagonal polarization state. As the first measurement was performed weakly, the system is not significantly disturbed, and therefore, information gained from the second measurement was still valid. This process is repeated several times to build up accurate statistics. Putting all of this together gives a full, direct characterization of the polarization states of the light."
terbeaux writes "The fact that Rep Ed Orcutt (R — WA) wants to tax bicycle use is not extraordinary. The representative's irrational conviction is. SeattleBikeBlog has confirmed reports that Orcutt does not feel bicycling is environmentally friendly because the activity causes cyclists to have 'an increased heart rate and respiration.' When they contacted him he clarified that 'You would be giving off more CO2 if you are riding a bike than driving in a car...' Cascade blog has posted the full exchange between Rep Ed Orcutt and a citizen concerned about the new tax."
An anonymous reader writes in with news of a breakthrough in the treatment of HIV. "A baby born with the AIDS virus two years ago in Mississippi who was put on antiretroviral therapy within hours of birth appears to have been cured of the infection, researchers said Sunday at a scientific conference in Atlanta. Whether the cure is complete and permanent, or only partial and long-lasting, is not certain. Either way, the highly unusual case raises hope for the more than 300,000 babies born with the infection around the world each year."
Hugh Pickens writes writes "The first dogs descended from wolves about 14,000 years ago but according to Brian Hare and Vanessa Woods humans didn't domesticate dogs — dogs sought out humans and domesticated us. Humans have a long history of eradicating wolves, rather than trying to adopt them which raises the question: How was the wolf tolerated by humans long enough to evolve into the domestic dog? 'The short version is that we often think of evolution as being the survival of the fittest, where the strong and the dominant survive and the soft and weak perish. But essentially, far from the survival of the leanest and meanest, the success of dogs comes down to survival of the friendliest.' Most likely, it was wolves that approached us, not the other way around, probably while they were scavenging around garbage dumps on the edge of human settlements. The wolves that were bold but aggressive would have been killed by humans, and so only the ones that were bold and friendly would have been tolerated. In a few generations, these friendly wolves became distinctive from their more aggressive relatives with splotchy coats, floppy ears, wagging tails. But the changes did not just affect their looks but their psychology. Protodogs evolved the ability to read human gestures. 'As dog owners, we take for granted that we can point to a ball or toy and our dog will bound off to get it,' write Hare and Woods. 'But the ability of dogs to read human gestures is remarkable. Even our closest relatives — chimpanzees and bonobos — can't read our gestures as readily as dogs can. 'With this new ability, these protodogs were worth knowing. People who had dogs during a hunt would likely have had an advantage over those who didn't. Finally when times were tough, dogs could have served as an emergency food supply and once humans realized the usefulness of keeping dogs as emergency food, it was not a huge jump to realize plants could be used in a similar way.' This is the secret to the genius of dogs: It's when dogs join forces with us that they become special," conclude Hare and Woods. 'Dogs may even have been the catalyst for our civilization.'"
An anonymous reader writes "A multi-university team of researchers has artificially engineered a unique multilayer material that could lead to breakthroughs in both superconductivity research and in real-world applications. The researchers can tailor the material, which seamlessly alternates between metal and oxide layers, to achieve extraordinary superconducting properties — in particular, the ability to transport much more electrical current than non-engineered materials."
astroengine writes "Acquired by the European Southern Observatory's Very Large Telescope (VLT), an infrared observation shows a portion of the disk of gas and dust around the star HD 100546, located 335 light-years away in the constellation Musca. By physically blocking out the light from the star itself by means of an opaque screen, the light from the protoplanetary disk around HD 100546 can be seen, revealing a large bright clump that's thought to be a planet in the process of formation (PDF). If it is indeed a baby planet, it's a big one — as large as, or perhaps even larger than, Jupiter."
Despite having some trouble with maneuvering thrusters a few days ago, SpaceX's Dragon cargo capsule has successfully reached the International Space Station. from the article: "Astronauts aboard the outpost used the station's robotic arm to pluck the capsule from orbit at 5:31 a.m. EST as the ships sailed 250 miles over northern Ukraine. Flight controllers at NASA's Mission Control in Houston then stepped in to drive the capsule to its berthing port on the station's Harmony connecting node."
New submitter physlord writes in with a story about tadpoles with eyes on their tails. "Using embryos from the African clawed frog (Xenopus), scientists at Tufts' Center for Regenerative and Developmental Biology were able to transplant eye primordia—basically, the little nubs of flesh that will eventually grow into an eye—from one tadpole's head to another's posterior, flank, or tail....Amazingly, a statistically significant portion of the transplanted one-eyes could not only detect LED changes, but they showed learning behavior when confronted with electric shock."
alancronin writes "NASA's Mars rover Curiosity has been temporarily put into 'safe mode,' as scientists monitoring from Earth try to fix a computer glitch, the US space agency said. Scientists switched to a backup computer Thursday so that they could troubleshoot the problem, said to be linked to a glitch in the original computer's flash memory. 'We switched computers to get to a standard state from which to begin restoring routine operations,' said Richard Cook of NASA's Jet Propulsion Laboratory, the project manager for the Mars Science Laboratory Project, which built and operates Curiosity."
An anonymous reader writes "Astrophysicist Neil deGrasse Tyson talks stopping extinction-level meteor hits: '...Here in America, we're really good at blowing stuff up and less good at knowing where the pieces land, you know...So, people who have studied the problem generally – and I'm in this camp – see a deflection scenario is more sound and more controllable. So if this is the asteroid and it's sort of headed toward us, one way is you send up a space ship and they'll both feel each other. And the space ship hovers. And they'll both feel each other's gravity. And they want to sort of drift toward one another. But you don't let that happen. You set off little retro rockets that prevent it. And the act of doing so slowly tugs the asteroid into a new orbit.'"
curtwoodward writes "Now that President Obama's federal health care reform is past its major political hurdles — and with renewed focus on out-of-control costs in healthcare — companies that sell 'big data' software are licking their chops. The reason: Healthcare has huge piles of information that is being used in new ways, to track patient admissions, spending, and much more. From hospitals to insurance companies, they'll all need new ways of crunching those numbers. It's basically an entirely new field that will dwarf the spending growth in traditional data-heavy industries like finance, retail and marketing, a Microsoft regional sales GM says."
SpaceX's Dragon launch to the ISS earlier today went off smoothly, but the mission encountered trouble shortly after: three sets (of four) of the craft's maneuvering thrusters didn't work. CNET quotes SpaceX founder Elon Musk: "It looks like there was potentially some blockage in the oxidizer pressurization (system). It looks like we've been able to free that blockage, or maybe a stuck valve. We've been able to free that up by cycling the valves, essentially pressure hammering the valves, to get that to loosen. It looks like that's been effective. All the oxidizer tanks are now holding the target pressure on all four (thruster) pods. I'm optimistic we'll be able to bring all four of them up and then we'll work closely with NASA to figure out what the next step is for rendezvousing with space station," and follows up with the good news that "Shortly after the briefing concluded, engineers reported all four sets of thrusters were back on line and that testing was underway to verify the health of the system." Barring further problems, Dragon could reach the ISS as soon as Sunday.