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Science

Scientists Demonstrate Ultra-Fast Magnetite Electrical Switch 37

Posted by Soulskill
from the but-now-we're-vulnerable-to-magneto dept.
adeelarshad82 writes "Researchers at the U.S. Department of Energy's SLAC National Accelerator Laboratory recently demonstrated electrical switching thousands of times faster than in transistors now in use thanks to a naturally magnetic mineral called magnetite (abstract). The experiment is considered a major step forward in understanding electrical structures at the atomic level and working with recently identified electrical 'building blocks' called trimerons. The breakthrough could lead to innovations in the tiny transistors that control the flow of electricity across silicon chips, enabling faster, more powerful computing devices."
Earth

What's Stopping Us From Eating Insects? 655

Posted by timothy
from the there-will-never-be-a-fast-food-place-called-thoraxes-etc. dept.
Lasrick writes "Scientific American has a really nice article explaining why insects should be considered a good food source, and how the encroachment of Western attitudes into societies that traditionally eat insects is affecting consumption of this important source of nutrients. Good stuff." Especially when they're so easy to grow.
Medicine

How Outdated Data Distorts Doctors' Pay 336

Posted by Unknown Lamer
from the name-your-price dept.
Hugh Pickens DOT Com writes "Peter Whoriskey and Dan Keating report at the Washington Post that Medicare annually pays $69.6 billion for physician services according to an arcane and little-known price list, known as the Relative Value Update over which doctors themselves exercise considerable and less-than-totally-transparent influence. A 31-member committee of the American Medical Association (AMA) recommends what Medicare should pay for some 10,000 procedures — with the fees based in part on how long it takes to complete each one. But this time-and-motion study often fails to take full account of changing technology and other factors affecting physician productivity, so anomalies result. For example, if the AMA time estimates are correct, then 41 percent of gastroenterologists were typically performing 12 hours or more of procedures in a day, which is longer than the typical outpatient surgery center is open and and one gastroenterologist in the Post story would have to work 26 hours, according to the committee time estimates, to accomplish what he gets done in a typical workday. Here's how it works: Medicare pays for a 15-minute colonoscopy as if it took 75 minutes resulting in a median salary for a gastroenterologist of $481,000. It is possible that in 1992, critics allow, when the price list was first developed, a colonoscopy actually took something close to 75 minute when doctors had to hunch over an eyepiece similar to that of a microscope for a look. But technology has advanced and now the images are processed and displayed on a large screen in high-definition video. Responding to criticism that the nation's method of valuing medical procedures misprices payments, a bipartisan group of legislators has drafted a bill that would reshape the way the nation pays doctors. The bill would require Medicare officials to collect data such as how much time doctors spend doing procedures and reducing the doctor payment for overvalued services. 'What started as an advisory group has taken on a life of its own,' says Tom Scully, who was Medicare chief during the George W. Bush Administration. 'The idea that $100 billion in federal spending is based on fixed prices that go through an industry trade association in a process that is not open to the public is pretty wild.'"
Biotech

Nitrogen Fixing Bacteria That Can Colonize Most Plants Discovered 187

Posted by Unknown Lamer
from the watch-out-for-miracle-gro-assassins dept.
Zothecula writes "Synthetic crop fertilizers are a huge source of pollution. This is particularly true when they're washed from fields (or leach out of them) and enter our waterways. Unfortunately, most commercial crops need the fertilizer, because it provides the nitrogen that they require to survive. Now, however, a scientist at the University of Nottingham has developed what he claims is an environmentally-friendly process, that allows virtually any type of plant to obtain naturally-occurring nitrogen directly from the atmosphere." The process involves injecting a bacteria that colonizes the plant and fixes atmospheric nitrogen in exchange for a bit of sugar, similar to soybeans. Only this bacteria will readily colonize most any plant.
Space

Epic Online Space Battle 296

Posted by Unknown Lamer
from the get-the-hell-out-of-our-galaxy dept.
New submitter nusscom writes "On July 28th, as has been reported by BBC, a record number of EVE Online players participated in a record-breaking online battle between two alliances. This battle, which was essentially a turf-war was comprised of over 4,000 online players at one time. The load was so large that Crowd Control Productions (CCP) slowed down the game time to 10% of normal to accommodate the massive amount of activity." This is the largest battle to ever occur on EVE Online.
Space

Lower Thermal Radiation Input Needed To Trigger Planetary 'Runaway Greenhouse' 137

Posted by Unknown Lamer
from the poor-venus dept.
vinces99 writes with this excerpt from the UW news service: "It might be easier than previously thought for a planet to overheat into the scorchingly uninhabitable 'runaway greenhouse' stage, according to new research (abstract, article paywalled) by astronomers at the University of Washington and the University of Victoria. In the runaway greenhouse stage, a planet absorbs more solar energy than it can give off to retain equilibrium. As a result, the world overheats, boiling its oceans and filling its atmosphere with steam, which leaves the planet glowing-hot and forever uninhabitable, as Venus is now. One estimate of the inner edge of a star's 'habitable zone' is where the runaway greenhouse process begins. The habitable zone is that ring of space around a star that's just right for water to remain in liquid form on an orbiting rocky planet's surface, thus giving life a chance. Revisiting this classic planetary science scenario with new computer modeling, the astronomers found a lower thermal radiation threshold for the runaway greenhouse process, meaning that stage may be easier to initiate." If correct, the habitable zone shrinks a bit and a few exoplanets might lose their potentially habitable status. And the Earth will leave the habitable zone in a billion and a half or so years as the Sun gets brighter.
Science

Monogamy May Have Evolved To Prevent Infanticide 256

Posted by samzenpus
from the a-modest-proposal dept.
sciencehabit writes "Human males and females have a strong tendency to live together in monogamous pairs, albeit for highly varied periods of time and degrees of fidelity. Just how such behavior arose has been the topic of much debate among researchers. A new study comes to a startling conclusion: Among primates, including perhaps humans, monogamy evolved because it protected infants from being killed by rival males."
Science

Natural Affinities of RNA Components Could Have Led To Life 30

Posted by samzenpus
from the in-the-beginning dept.
vinces99 writes "The chemical components crucial to the start of life on Earth may have primed and protected each other in never-before-realized ways, according to new research led by University of Washington scientists. That could mean a simpler scenario for how that first spark of life on the planet came about. Scientists have long thought that life started when the right combination of bases and sugars produced self-replicating ribonucleic acid, or RNA, inside a rudimentary 'cell' composed of fatty acids. Under the right conditions, fatty acids naturally form into bag-like structures similar to today's cell membranes. In testing one of the fatty acids representative of those found before life began – decanoic acid – the scientists discovered that the four bases in RNA bound more readily to the decanoic acid than did the other seven bases tested. By concentrating more of the bases and sugar that are the building blocks of RNA, the system would have been primed for the next steps, reactions that led to RNA inside a bag."
Medicine

Breakthrough In Detecting DNA Mutations Could Help Treat Cancer, TB 42

Posted by samzenpus
from the narrowing-it-down dept.
vinces99 writes "Researchers have developed a new method that can look at a specific segment of DNA and pinpoint a single mutation, which could help diagnose and treat diseases such as cancer and tuberculosis. These small changes can be the root of a disease or the reason some infectious diseases resist certain antibiotics. The findings were published online July 28 in the journal Nature Chemistry. 'We've really improved on previous approaches because our solution doesn't require any complicated reactions or added enzymes, it just uses DNA,' said lead author Georg Seelig, a University of Washington assistant professor of electrical engineering and of computer science and engineering. 'This means that the method is robust to changes in temperature and other environmental variables, making it well-suited for diagnostic applications in low-resource settings.' The researchers designed probes that can pick out mutations in a single base pair in a target stretch of DNA. The probes allow researchers to look in much more detail for variations in long sequences up to 200 base pairs while current methods can detect mutations in stretches of up to only 20."
Space

"Slingatron" To Hurl Payloads Into Orbit 438

Posted by samzenpus
from the throwing-it-out-there dept.
cylonlover writes "People have been shooting things into space since the 1940s, but in every case this has involved using rockets. This works, but it's incredibly expensive with the cheapest launch costs hovering around $2,000 per pound. This is in part because almost every bit of the rocket is either destroyed or rendered unusable once it has put the payload into orbit. Reusable launch vehicles like the SpaceX Grasshopper offer one way to bring costs down, but another approach is to dump the rockets altogether and hurl payloads into orbit. That's what HyperV Technologies Corp. of Chantilly, Virginia is hoping to achieve with a 'mechanical hypervelocity mass accelerator' called the slingatron."
Censorship

Dentist Who Used Copyright To Silence Her Patients Drops Out of Sight 260

Posted by timothy
from the my-current-dentist-has-been-nice-so-far dept.
According to a report at Ars Technica, a dentist named Stacy Makhnevich, who billed herself as "the Classical Singer Dentist of New York," threatened patients who wrote bad Yelp reviews with lawsuits, along the same lines as the online dental damage-control outlined in a different Ars story in 2011. This time, though, there's something even stranger than bargaining with patients to forgo criticism: when a patient defied that demand by describing his experience in negative terms on Yelp, Makhnevich followed up on the threat by seeking a takedown order based on copyright (putatively signed over to her for any criticism that patients might write, post-visit) — then disappeared entirely when lawyers for patient Robert Lee filed a class-action lawsuit challenging the validity of the agreement.
Space

NASA's Garver Proposes Carving Piece Off Big Asteroid For Near-Earth Mining 110

Posted by timothy
from the worth-it-at-any-price dept.
MarkWhittington writes "According to a July 26, 2013 story in Space News, NASA Deputy Administrator Lori Garver mused about what appeared to be a change to the space agency's asteroid snatching mission at the NewSpace 2013 conference. Apparently the idea is to send a robot to a larger asteroid than originally planned, carve out a chunk of it, and then bring it to lunar orbit for an crew of astronauts to visit in an Orion space ship. Garver's proposed change would widen the number of target asteroids and would test technologies important for asteroid mining. But it would also increase the complexity and certainly the cost of the asteroid mission. There are a lot of unanswered questions, such as what kind of mechanism would be involved in taking a piece of an asteroid and moving it? At the same conference Garver had hinted at a willingness to consider mounting a program of "sustainable" lunar exploration, as some in Congress have demanded, concurrent with the asteroid mission."
Math

Microsoft's Math-Challenged STEM Education Contest 96

Posted by timothy
from the rounding-sideways dept.
theodp writes "As noted earlier, Microsoft is tackling the CS education crisis with a popularity contest that will award $100K in donations to five technology education nonprofits that help make kids technically literate. Hopefully, the nonprofits will teach kids that the contest's voting Leader Board is a particularly good example of what-not-to-do technically. In addition to cherry-picking the less-pathetic vote totals to make its Leader Board, Microsoft also uses some dubious rounding code that transforms the original voting data into misleading percentages. Indeed, developer tools reveal that the top five leaders in the Microsoft STEM education contest miraculously account for 130% of the vote. Let's hope the quality control is better for those Microsoft Surface voting machines!"
Biotech

GMO Oranges? Altering a Fruit's DNA To Save It 358

Posted by timothy
from the you-wait-until-its-gmo-coffee-or-nothing-at-all dept.
biobricks writes "A New York Times story says the Florida orange crop is threatened by an incurable disease and traces the efforts of one company to insert a spinach gene in orange trees to fend it off. Not clear if consumers will go for it though." The article focuses on oranges, but touches on the larger world of GMO crop creation as well.
Earth

Same Programs + Different Computers = Different Weather Forecasts 240

Posted by timothy
from the climate-change-without-leaving-the-room dept.
knorthern knight writes "Most major weather services (US NWS, Britain's Met Office, etc) have their own supercomputers, and their own weather models. But there are some models which are used globally. A new paper has been published, comparing outputs from one such program on different machines around the world. Apparently, the same code, running on different machines, can produce different outputs due to accumulation of differing round-off errors. The handling of floating-point numbers in computing is a field in its own right. The paper apparently deals with 10-day weather forecasts. Weather forecasts are generally done in steps of 1 hour. I.e. the output from hour 1 is used as the starting condition for the hour 2 forecast. The output from hour 2 is used as the starting condition for hour 3, etc. The paper is paywalled, but the abstract says: 'The global model program (GMP) of the Global/Regional Integrated Model system (GRIMs) is tested on 10 different computer systems having different central processing unit (CPU) architectures or compilers. There exist differences in the results for different compilers, parallel libraries, and optimization levels, primarily due to the treatment of rounding errors by the different software systems. The system dependency, which is the standard deviation of the 500-hPa geopotential height averaged over the globe, increases with time. However, its fractional tendency, which is the change of the standard deviation relative to the value itself, remains nearly zero with time. In a seasonal prediction framework, the ensemble spread due to the differences in software system is comparable to the ensemble spread due to the differences in initial conditions that is used for the traditional ensemble forecasting.'"
ISS

Russian Vehicle Delivers Spacesuit Repair Kit To ISS 39

Posted by timothy
from the why-didn't-they-pay-the-$4-for-overnight? dept.
A Russian spacecraft has successfully delivered new supplies to the ISS. Crucially, its payload is meant to prevent a repeat of the aborted spacewalk of earlier this month. Says the article:: "The cargo ship is loaded with nearly 3 tons (2.7 tonnes) of food, fuel, hardware and science experiment equipment for the six-person crew of the station's Expedition 36 mission. Among its cargo is a set of tools intended to help the astronauts investigate and patch up the spacesuit that malfunctioned during a July 16 spacewalk outside the orbiting laboratory."
Education

US Academy President Caught Embellishing Resume, Will Resign 124

Posted by timothy
from the motivational-psychology dept.
An anonymous reader writes "The 233-year old American Academy of Arts and Sciences has announced that its longtime President and Chief Executive, Leslie Cohen Berlowitz, has agreed to resign effective at the end of this month following an investigation of charges of resume embellishment and other misconduct. Berlowitz falsely claimed to have received a doctorate from New York University, and has also been criticized for her behavior towards scholars and subordinates, and for her compensation package ($598,000 for 2012) relative to the size of the non-profit organization she led. The Academy, based in Cambridge MA, was founded during the American Revolutionary War and is one of the most prestigious honorary societies for the American intellectual elite, extending across math and science, arts and letters, business, law and public affairs. The active membership rolls contain people you've heard of; the incoming class list provides a more manageable glimpse of the society's breadth."
Earth

Crowdfunded Effort Could Build World's 10th Deepest Diving Submersible 27

Posted by timothy
from the rapture-of-the-deep dept.
An anonymous reader writes with an optimistic, present-tense summary of a crowdfunding project to explore Earth's deep ocean: "The Ictineu 3 will be the 10th deepest diving submersible in the world when it is launched later this year. Compared to its deep diving peers, including Russia's Mirs, Japan's Shinkai 6500, the U.S.'s Alvin,and Cameron's Deep Sea Challenger submersibles, the Ictineu 3 was developed on a shoestring budget. The management partners are self-taught, without formal engineering education. Instead of massive government grants, the project has been funded by a trickle of small grants, sponsorships, and private donors. Along with Karl Stanley, the Ictineu team are heroes to the DIY submariners of the world."
Medicine

Would You Let a Robot Stick You With a Needle? 209

Posted by timothy
from the with-pleasure-and-gusto dept.
An anonymous reader writes "IEEE Spectrum has a story about a robot that uses infra red and ultrasound to image veins, picks the one with best bloodflow, and then sticks a needle in. (video included). Veebot started as an undergrad project and the creators are aiming for better performance than a human phlebotimist before going for clinical trials. Robodracula anyone?"
Science

Swirls In the Afterglow of the Big Bang Could Set Stage For Major Discovery 54

Posted by Unknown Lamer
from the secrets-of-the-universe dept.
sciencehabit writes "Scientists have spotted swirling patterns in the radiation lingering from the big bang, the so-called cosmic microwave background. The observation itself isn't Earth-shaking, as researchers know that these particular swirls or 'B-modes' originated in conventional astrophysics, but the result suggests that scientists are closing in on a much bigger prize: B-modes spawned by gravity waves that rippled through the infant universe. That observation would give them a direct peek into the cosmos' first fraction of a second and possibly shed light on how it all began."

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