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Math

Missile Defense's Real Enemy: Math 589

Posted by Soulskill
from the i-will-confuse-you-by-running-straight-at-you dept.
An anonymous reader writes "Since the 1960s until the present day, missile defense has been a hot topic. Ronald Reagan popularized the concept with his 'Star Wars' multi-billion dollar plan to use lasers and various technologies to destroy incoming Soviet warheads. Today, America has a sizable sea-based system, dubbed AEGIS, that has been deployed to defend against rogue states missiles, both conventional and nuclear. However, there is one thing missile defense can't beat: simple math. 'Think about it — could we someday see a scenario where American forces at sea with a fixed amount of defensive countermeasures face an enemy with large numbers of cruise and ballistic weapons that have the potential to simply overwhelm them? Could a potential adversary fire off older weapons that are not as accurate (PDF), causing a defensive response that exhausts all available missile interceptors so more advanced weapons with better accuracy can deliver the crushing blow? Simply put: does math win?'"
Hardware

Spintronics Used To Create 3D Microchip 28

Posted by Soulskill
from the import-independence-from-flatland dept.
Zothecula writes "A major obstruction to the development of practical 3D microchips is moving data and logic signals from one layer of circuitry to another. This can be done with conventional circuitry, but is quite cumbersome and generates a good deal of heat inside the 3D circuit. Physicists at the University of Cambridge have now developed a spintronic shift register that allows information to be passed between different layers of a 3D microchip. 'To create the microchip, the researchers used an experimental technique called ‘sputtering’. They effectively made a club-sandwich on a silicon chip of cobalt, platinum and ruthenium atoms (abstract). The cobalt and platinum atoms store the digital information in a similar way to how a hard disk drive stores data. The ruthenium atoms act as messengers, communicating that information between neighbouring layers of cobalt and platinum. Each of the layers is only a few atoms thick. They then used a laser technique called MOKE to probe the data content of the different layers. As they switched a magnetic field on and off they saw in the MOKE signal the data climbing layer by layer from the bottom of the chip to the top.'"
Earth

Four At Once: Volcano Quartet Erupts On Kamchatka 77

Posted by Soulskill
from the taking-cameras-to-cool-places dept.
anavictoriasaavedra writes "A unique show is taking place on Kamchatka these days: Four separate but nearby volcanoes are erupting simultaneously on the Russian peninsula. A Moscow film crew has produced an awe-inspiring 360-degree video of the natural fireworks." The video is well worth watching and panning around in. There are also a bunch of high-res still photo panoramas.
Hardware Hacking

Public Domain Prosthetic Hand 31

Posted by Soulskill
from the you-might-find-this-handy dept.
New submitter Zeussy writes "While looking around Thingiverse for something to 3D-print, I found this awesome public domain prosthetic hand designed for a 5-year-old child called Liam, who was born without any fingers on his right hand. The design is based on parts either 3D-printed or bought from your local hardware store. It's body powered via cables and bungees; see it in action in this video. They are currently running a Fundly Fundraiser."
Moon

Architecture Firm and ESA To 3D Print Building On the Moon 113

Posted by samzenpus
from the if-you-print-it-they-will-come dept.
An anonymous reader writes "Internationally acclaimed architecture firm Foster + Partners built the Hearst Tower, the Millennium Bridge, and the Gherkin here on earth — and now they're setting their sights on outer space with plans to produce a 3D printed building on the moon. Today the firm announced that it has partnered with the European Space Agency to develop a lunar base for four people that can withstand the threat of meteorites, gamma radiation and temperature fluctuations. Since transporting building materials to space is a challenge, the team is considering using on-site 3D printing as a solution."
NASA

NASA Says Asteroid Will Buzz Earth Closer Than Many Satellites 225

Posted by samzenpus
from the skin-of-your-teeth dept.
coondoggie writes "NASA says an asteroid about half the size of a football field will blow past Earth on Feb 15 closer than many man-made satellites. NASA added that while the asteroid, designated 2012 DA14, has no chance of striking Earth. Since regular sky surveys began in the 1990s, astronomers have never seen an object so big come so close to our planet."
Science

Walk or Run: Are We Built To Be Lazy? 189

Posted by samzenpus
from the taking-it-easy dept.
sciencehabit writes "A quick visit to Monty Python's Ministry of Silly Walks shows just how many ways humans (or at least British comedians) can think of to travel from point A to point B. So why don't we high kick our way to the bus stop or skip to the grocery store? New research suggests that there may be a deep biomechanical reason governing the gaits we choose in different situations. In short, people consistently choose to walk when they need to travel slower than 2 m/s to reach their goal in the given time; when they needed to move about 3 m/s or faster, they ran. But in between—in 'the twilight zone between walking and running'—people tended to mix the two gaits, minimizing their energy expenditure. The findings could help scientists design better prosthetic limbs and even build more human-like robots"
Earth

Will Renewable Energy Ever Meet All Our Energy Needs? 626

Posted by samzenpus
from the doom-and-gloom dept.
Lasrick writes "Dawn Stover has another great piece detailing why renewable energy will never provide us with all our energy needs. She deconstructs the unrealistic World Wildlife Fund report (co-written by several solar companies) that claims renewables will be able to provide 100% of the energy needs of several countries by 2050. From the article: 'When renewable energy experts get together, they tend to rhapsodize about the possibilities, believing that this will somehow inspire others to make their visions come true. But ambitious plans to power entire countries on solar energy (or wind or nuclear power, for that matter) don't have a snowball's chance in Australia. Such schemes are doomed to fail, and not because of the economic "reality" or the political "reality" -- however daunting those may be. They are doomed because of the physical reality: It's simply not physically possible for the world's human population to continue growing in numbers, affluence, and energy consumption without trashing the planet.'"
Earth

Oil Detection Methods Miss Important Class of Chemicals 46

Posted by Soulskill
from the beverly-hillbillies-reboot-already-in-production dept.
MTorrice writes "For decades, scientists studying oil spills have relied on the same analytical methods when tracking the movement of oil and assessing a spill's environmental impact. But these techniques miss an entire class of compounds that could account for about half of the total oil in some samples, according to research presented last week at the Gulf of Mexico Oil Spill & Ecosystem Science Conference, in New Orleans. These chemicals could explain the fate of some of the oil released in the 2010 Deepwater Horizon accident and other spills, the researchers say."
Space

Nearby Star Could Host a Baby Solar System 24

Posted by Soulskill
from the discovered-spamming-facebook-feed-with-baby-pictures dept.
astroengine writes "With the help of Europe's Herschel Space Observatory and the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, a team of astronomers have made a lucky discovery about TW Hydrae, the nearest star to the solar system that plays host to a protoplanetary disk. Not only have they gained a more precise estimate of the mass of the material inside the protoplanetary disk, they've also found that it may produce a system of worlds similar to that of the solar system. TW Hydrae may look like the solar system did over 4 billion years ago (abstract). Interestingly, TW Hydrae is also a star that would normally be considered too mature to host a protoplanetary disk. "If there's no chance your project can fail, you're probably not doing very interesting science. TW Hydrae is a good example of how a calculated scientific gamble can pay off," said Thomas Henning, of the Max Planck Institute for Astronomy in Heidelberg."
Science

Interviews: Ask James Randi About Investigating the Truth 386

Posted by samzenpus
from the I-aint-afraid-of-no-ghosts dept.
Better known by his stage name "The Amazing Randi", James Randi has made it his quest to "debunk psychic nonsense, disprove paranormal fakers, and squash claims of pseudoscience in order to bring the truth to the forefront." Randi worked as a popular magician most of his life and earned international fame in 1972 when he accused the famous psychic Uri Geller of being a fraud and challenged him to prove otherwise. In 1996 Randi founded The James Randi Educational Foundation (JREF) a non-profit organization whose mission includes "educating the public and the media on the dangers of accepting unproven claims, and to support research into paranormal claims in controlled scientific experimental conditions." He began offering $1000 in 1964 to anyone who could demonstrate proof of the paranormal. That amount has grown over the years, and the foundation's prize for such proof is now $1M. Around 1000 people have tried to claim the prize so far without success. Randi has agreed to take a break from busting ghostbusters and giving psychic healers a taste of their own medicine in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
Medicine

Polymer Patches May Enable Effective DNA Vaccines 83

Posted by Unknown Lamer
from the thousands-of-micro-needles dept.
Zothecula writes "Taking a two-month-old in for vaccination shots and watching them get stuck with six needles in rapid succession can be painful for child and parent alike. If the work of an MIT team of researchers pans out, those needles may be thing of the past thanks to a new dissolvable polymer film that allows the vaccination needle to be replaced with a patch. This development will not only make vaccinations less harrowing, but also allow for developing and delivering vaccines for diseases too dangerous for conventional techniques." The patch was designed with delivering DNA-based vaccines in mind. Thus far efforts to use DNA to generate more robust and safe vaccines has failed thanks to the immune system destroying them; the polymer film embeds itself in your skin and slowly dissolves, protecting the DNA in the process.
Biotech

Putting Biotech Threats In Context 117

Posted by Soulskill
from the terrorists-will-make-your-elbows-melt dept.
Lasrick writes "This article starts with an interesting anecdote: 'In 1998, President Bill Clinton read a novel about biological warfare that deeply disturbed him. In fact, the story reportedly kept him up all night. It’s one of the reasons that Clinton became personally invested in protecting the United States from bioterrorism threats. The book was The Cobra Event (Preston, 1998), a sci-fi thriller by journalist and novelist Richard Preston that told of a mad scientist who brewed a lethal, genetically engineered virus in his New York City apartment. Preston’s tale highlighted the potential ease with which individuals or small groups with access to advanced bioweapons capabilities could launch attacks on major US cities.1 After reading The Cobra Event, Clinton called several advisory meetings and ordered classified assessments and simulation exercises to examine the threat depicted in the story. As a result of these deliberations, by the end of his administration Clinton had increased funding for biodefense preparedness efforts fourfold, to more than $400 million per year.' The article goes on to describe the two trajectories of bioweapons threats, and puts them both in perspective. It may or may not calm everyone who's ever spent a sleepless night after reading one of the many bioterrorism novels"
Open Source

How Open Source Could Benefit Academic Research 84

Posted by Soulskill
from the many-eyes-makes-all-scientific-mysteries-shallow dept.
dp619 writes "Ross Gardler, of Apache Fame, has written a guest post on the Outercurve Foundation blog advocating that universities accelerate the research process through a collaborative sharing and development of research software while examining reasons why many have been reluctant to publish their source code. Quoting: 'These highly specialized software solutions are not rarely engineered for reuse. They are often hacks to answer a specific question quickly. ... What many academic researchers fail to understand is that this specialization problem is not unique to research projects. Most software developers will seek to provide an adequate solution to their specific problem, as quickly as possible. They don't seek to build a perfect, all-purpose, tool set that can be reused in every conceivable circumstance. They simply solve the problem at hand and move on to the next one. The difference is that open source developers will do this incremental problem solving using shared code. They will share that code in incremental steps rather than wait until they've built the complete system they need but is too specific for others to use. Other people will reuse and improve on the initial solution, perhaps generalizing it a little in the process. There is no need to share the details of why one needs a 'green widget' nor is there any reason to prevent someone modifying it so it can be either a 'green widget' or a 'blue widget.'"
IBM

Stanford Uses Million-Core Supercomputer To Model Supersonic Jet Noise 66

Posted by Soulskill
from the i-would-use-it-to-play-quake dept.
coondoggie writes "Stanford researchers said this week they had used a supercomputer with 1,572,864 compute cores to predict the noise generated by a supersonic jet engine. 'Computational fluid dynamics simulations test all aspects of a supercomputer. The waves propagating throughout the simulation require a carefully orchestrated balance between computation, memory and communication. Supercomputers like Sequoia divvy up the complex math into smaller parts so they can be computed simultaneously. The more cores you have, the faster and more complex the calculations can be. And yet, despite the additional computing horsepower, the difficulty of the calculations only becomes more challenging with more cores. At the one-million-core level, previously innocuous parts of the computer code can suddenly become bottlenecks.'"
Earth

Mutations Helped Humans Survive Siberian Winters 77

Posted by Unknown Lamer
from the grow-your-own-sweater dept.
sciencehabit writes "Researchers have identified three genetic mutations that appear to have helped humans survive in the frigid climate of Siberia over the last 25,000 years. One helps the body's fat stores directly produce heat rather than producing chemical energy for muscle movements or brain functions, a process called 'nonshivering thermogenesis.' Another is involved in the contraction of smooth muscle, key to shivering and the constriction of blood vessels to avoid heat loss. And the third is implicated in the metabolism of fats, especially those in meat and dairy products—a staple of the fat-laden diets of Arctic peoples."
Earth

Microbes Survive, and Maybe Thrive, High In the Atmosphere 37

Posted by samzenpus
from the a-place-in-the-clouds dept.
sciencehabit writes "Each year, hundreds of millions of metric tons of dust, water, and humanmade pollutants make their way into the atmosphere, often traveling between continents on jet streams. Now a new study confirms that some microbes make the trip with them, seeding the skies with billions of bacteria and other organisms—and potentially affecting the weather. What's more, some of these high-flying organisms may actually be able to feed while traveling through the clouds, forming an active ecosystem high above the surface of the Earth."
Google

Google Pledges Pi Million Dollars In Pwnium 3 Prizes 60

Posted by samzenpus
from the puns-are-fun dept.
chicksdaddy writes "Google cemented its reputation as the squarest company around Monday (pun intended), offering prizes totaling Pi Million Dollars — that's right: $3.14159 million greenbacks — in its third annual Pwnium hacking contest, to be held at the CanSecWest conference on March 7 in Vancouver, British Columbia. Google will pay $110,000 for a browser or system level compromise delivered via a web page to a Chrome user in guest mode or logged in. The company will pay $150,000 for any compromise that delivers 'device persistence' delivered via a web page, the company announced on the chromium blog. 'We believe these larger rewards reflect the additional challenge involved with tackling the security defenses of Chrome OS, compared to traditional operating systems,' wrote Chris Evans of Google's Security Team."
Science

Interviews: Ask Ray Kurzweil About the Future of Mankind and Technology 244

Posted by samzenpus
from the future-is-now dept.
The recipient of nineteen honorary doctorates, and honors from three U.S. presidents, Ray Kurzweil's accolades are almost too many to list. A prolific inventor, Kurzweil created the first CCD flatbed scanner, the first omni-font optical character recognition, the first print-to-speech reading machine for the blind, the first text-to-speech synthesizer, and the first music synthesizer capable of recreating the grand piano and other orchestral instruments. His book, The Singularity Is Near, was a New York Times best seller. and is considered one of the best books about futurism and transhumanism ever written. Mr. Kurzweil was hired by Google in December as Director of Engineering to "work on new projects involving machine learning and language processing." He has agreed to take a short break from creating and predicting the future in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
Space

Asteroid Resources Could Make Science Fiction Dreams and Nightmares a Reality 223

Posted by samzenpus
from the best-and-worst dept.
MarkWhittington writes "With two private companies, Planetary Resources and Deep Space Industries, proposing to set up asteroid mining, the prospect of accessing limitless wealth beyond the Earth has caused a bit of media speculation about what that could mean. The question arises, could asteroid resources be used to create the greatest dreams — and perhaps the worst nightmares — of science fiction?"
Space

Iran Says It Sent Monkey Into Space and Back 425

Posted by samzenpus
from the space-monkey dept.
Iranian state TV is claiming that the country has successfully sent a monkey into space and back, bringing Iran one step closer to its goal of a manned space flight. According to the report, the rocket named Pishgam, or Pioneer in Farsi, reached a height of 120km. From the article: "Iran has long said it seeks to send an astronaut into space as part of its ambitious aerospace program, including plans for a new space center announced last year. In 2010, Iran said it launched an Explorer rocket into space carrying a mouse, a turtle and worms."
Science

Poor Sleep Prevents Brain From Storing Memories 180

Posted by timothy
from the so-if-you're-reading-this-go-to-bed dept.
jjp9999 writes "Recent findings published on Jan. 27 in the journal Nature Neuroscience may inspire you to get some proper sleep. Researchers at UC Berkeley found that REM sleep plays a key role in moving short term memories from the hippocampus (where short-term memories are stored) to the prefrontal cortex (where long-term memories are stored), and that degeneration of the frontal lobe as we grow older may play a key role in forgetfulness. 'What we have discovered is a dysfunctional pathway that helps explain the relationship between brain deterioration, sleep disruption and memory loss as we get older – and with that, a potentially new treatment avenue,' said UC Berkeley sleep researcher Matthew Walker."
Earth

Cities' Heat Can Affect Temperatures 1000+ Miles Away 263

Posted by timothy
from the let's-terraform-earth dept.
Living in dense cities makes for certain efficiencies: being able to walk or take mass transit to work, living in buildings with (at least potentially) efficient HVAC systems, and more. That's why cities have been lauded in recent years for their (relatively) low environmental impact. But it seems at least one aspect of city life has an environmental effect felt at extreme distances from the cities themselves: waste heat. All those tightly packed sources of heat, from cars to banks of AC units, result in temperature changes not just directly (and locally) but by affecting weather systems surrounding the source city. From the article: "The released heat is changing temperatures in areas more than 1,000 miles away (1609 kilometers). It is warming parts of North America by about 1 degree Fahrenheit (0.6 degrees Celsius) and northern Asia by as much as 1.8 degrees Fahrenheit (1 degree Celsius), while cooling areas of Europe by a similar amount, scientists report in the journal Nature Climate Change. The released heat (dubbed waste heat), it seems, is changing atmospheric circulation, including jet streams — powerful narrow currents of wind that blow from west to east and north to south in the upper atmosphere. This impact on regional temperatures may explain a climate puzzle of sorts: why some areas are having warmer winters than predicted by climate models, the researchers said. In turn, the results suggest this phenomenon should be accounted for in models forecasting global warming."
Earth

Norwegian Study: Global Warming Less Severe Than Feared 468

Posted by timothy
from the don't-question-your-questions dept.
Numerous news outlets are reporting the findings of a study from the Research Council of Norway — a government agency — which concludes that (in Bloomberg's version) "After the planet's average surface temperature rose through the 1990s, the increase has almost leveled off at the level of 2000, while ocean water temperature has also stabilized." The New York Times' Dot Earth blog offers some reasons to be skeptical of the findings.
Microsoft

With MS Research Help, UN Attempts To Model All of Earth's Ecosystems 39

Posted by timothy
from the how-about-tax-money-means-no-firewalls? dept.
An anonymous reader writes "Microsoft Research and UN scientists have teamed up to build the first general-purpose computer model of whole ecosystems across the entire world. The project was detailed in a recent Nature article [note: yet another expensively paywalled original article] titled 'Ecosystems: Time to model all life on Earth.'"
Earth

Dung Beetles Navigate By the Milky Way; Pigeons Tune In To Magnetism 82

Posted by timothy
from the that-would-be-the-greatest-implant dept.
sciencehabit writes with this excerpt from Science magazine's colorful synopsis of a paywalled article at Current Biology "A day in the life of a male dung beetle goes something like this: Fly to a heap of dung, sculpt a clump of it into a large ball, then roll the ball away from the pile as fast as possible. However, it turns out that the beetles, who work at night, need some sort of compass to prevent them from rolling around in circles. New research suggests that the insects use starlight to guide their way. Birds, seals, and humans also use starlight to navigate, but this is the first time it's been shown in an insect." Also on the topic of How Animals Get Around Without GPS, new research has considerably heightened scientists understanding of birds' sensitivity to magnetic fields. For homing pigeons at least, this ability seems to be tied to a cluster of just 53 neurons (original paper, also behind a paywall).
Science

Purported Relativity Paradox Resolved 128

Posted by timothy
from the disappears-in-a-puff-of-logic dept.
sciencehabit writes "A purported conflict between the century-old theory of classical electrodynamics and Einstein's theory of special relativity doesn't exist, a chorus of physicists says. Last April, an electrical engineer claimed that the equation that determines the force exerted on an electrically charged particle by electric and magnetic fields — the Lorentz force law — clashes with relativity, the theory that centers on how observers moving at a constant speed relative to one another will view the same events. To prove it, he concocted a simple 'thought experiment' in which the Lorentz force law seemed to lead to a paradox. Now, four physicists independently say that they have resolved the paradox."
Biotech

Old Inkjet Becomes New Bio-Materials Printer 39

Posted by timothy
from the but-the-ink-is-so-expensive dept.
MikeChino writes "Instructables member Patrik has successfully transformed an old HP5150 inkjet printer into a DIY bioprinter. To do this he removed the plastic covers and panels and rewired the paper handling mechanism. Then he prepped ink cartridges to be able to handle biological materials by opening the lid, removing the ink, and washing it out with deionized water. For his first experiment, he printed a simple solution of arabinose onto filter paper."
Science

Mystery of the Shrunken Proton 171

Posted by Soulskill
from the neutron-did-it-in-the-nucleus-with-the-strong-nuclear-force dept.
ananyo writes "The proton, a fundamental constituent of the atomic nucleus, seems to be smaller than was previously thought. And despite three years of careful analysis and reanalysis of numerous experiments, nobody can figure out why. An new experiment published in Science only deepens the mystery. The proton's problems started in 2010, when research using hydrogen made with muons seemed to show that the particle was 4% smaller than originally thought. The measurement, published in Nature, differed from those obtained by two other methods by 4%, or 0.03 femtometers. That's a tiny amount but is still significantly larger than the error bars on either of the other measurements. The latest experiment also used muonic hydrogen, but probed a different set of energy levels in the atom. It yielded the same result as the Nature paper — a proton radius of 0.84 fm — but is still in disagreement with the earlier two measurements. So what's the problem? There could be a problem with the models used to estimate the proton size from the measurements, but so far, none has been identified. The unlikely but tantalizing alternative is that this is a hint of new physics."
The Military

Secret UK Uranium Components Plant Closed Over Safety Fears 101

Posted by samzenpus
from the duct-tape-and-wire dept.
Lasrick writes "The Guardian has an exclusive story regarding a secret uranium-enriching plant in the UK that was closed due to safety fears. From the article: 'A top-secret plant at Aldermaston that makes enriched uranium components for Britain's nuclear warheads and fuel for the Royal Navy's submarines has been shut down because corrosion has been discovered in its 'structural steelwork', the Guardian can reveal. The closure has been endorsed by safety regulators who feared the building did not conform to the appropriate standards. The nuclear safety watchdog demands that such critical buildings are capable of withstanding 'extreme weather and seismic events,' and the plant at Aldermaston failed this test. It has set a deadline of the end of the year for the problems to be fixed.'"
Mars

Opportunity Begins 10th Year on Mars 78

Posted by samzenpus
from the sticking-around dept.
An anonymous reader points out that 9 years ago the Opportunity rover started to explore the red planet. "The older, smaller cousin of NASA's huge Mars rover Curiosity is quietly celebrating a big milestone Thursday — nine years on the surface of the Red Planet. NASA's Opportunity rover landed on Mars the night of Jan. 24, 2004 PST (just after midnight EST on Jan. 25), three weeks after its twin, Spirit, touched down. Spirit stopped operating in 2010, but Opportunity is still going strong, helping scientists better understand the Red Planet's wetter, warmer past."
Science

Interviews: Ask What You Will of Paleontologist Jack Horner 208

Posted by samzenpus
from the life-found-a-way dept.
John "Jack" R. Horner is the Curator of Paleontology at the Museum of the Rockies, adjunct curator at the National Museum of Natural History, and one of the most famous paleontologists in the world. Known in the scientific community for his research on dinosaur growth and whether or not some species lived in social groups, he is most famous for his work on Jurassic Park and being the inspiration for the character of Alan Grant. Horner caused quite a stir with the publication of his book, How to Build a Dinosaur: Extinction Doesn't Have to Be Forever, in which he proposes creating a "chickensaurus" by genetically "nudging" the DNA of a chicken. Jack has agreed to step away from the genetics lab and put down the bones in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
Medicine

Clay Shirky On Hackers and Depression: Where's the Love? 319

Posted by timothy
from the suicide-hotline dept.
giminy writes "Clay Shirky has a thought-provoking piece on depression in the hacker community. While hackers tend to be great at internet collaboration on software projects, we often fall short when it comes to helping each other with personal problems. The evidence is only anecdotal, but there seems to be a higher than average incidence of mental health issues among hackers and internet freedom fighters. It would be great to see this addressed by our community through some outreach and awareness programs."
Science

What Birds Know About Fractal Geometry 74

Posted by samzenpus
from the looking-good dept.
sciencehabit writes "In a new study, researchers find that a single number that describes the complexity of feather patterns on bird chests, a parameter called the fractal dimension, is linked to whether a bird has a strong immune system or is malnourished. When scientists restricted the food of red-legged partridges, the patterns on their chests had a lower fractal dimension than those sported by their well-fed colleagues. The food-restricted birds, on average, weighed 13% less than their well-fed colleagues and had weaker immune systems, which makes fractal dimension an easily recognizable sign of a potential mate's health and vitality, the researchers contend."
Science

The Mathematics of the Lifespan of Species 158

Posted by samzenpus
from the turn-out-the-lights dept.
skade88 writes "NPR is reporting on a study in which the author claims to have found the formula to predict the average life span of members of a species. It does not apply to specific individuals of that species, only to the average life span of members of the species as a whole. From the article: 'It's hard to believe that creatures as different as jellyfish and cheetahs, daisies and bats, are governed by the same mathematical logic, but size seems to predict lifespan. The formula seems to be nature's way to preserve larger creatures who need time to grow and prosper, and it not only operates in all living things, but even in the cells of living things. It tells animals for example, that there's a universal limit to life, that though they come in different sizes, they have roughly a billion and a half heart beats; elephant hearts beat slowly, hummingbird hearts beat fast, but when your count is up, you are over.'"
Shark

Researchers Use Lasers For Cooling 132

Posted by samzenpus
from the keeping-it-cool dept.
MatthewVD writes "Infrared cameras on satellites and night vision goggles could soon use lasers to cool their components. According to the study published in Nature, researchers in Singapore were able to cool the semiconductor cadmium sulfide from 62 degrees fahrenheit to -9 degrees by focusing a green laser on it and making it fluoresce and lose energy as light. Since they require neither gas nor moving parts, they can be more compact, free from vibration and not prone to mechanical failure."
NASA

NASA and CSA Begin Testing Satellite Refueling On the ISS 65

Posted by samzenpus
from the trying-it-out dept.
Zothecula writes "NASA and the Canadian Space Agency (CSA) have begun practicing satellite refueling in space on a test bed outside the International Space Station (ISS). In a series of tests that started on January 14 and are scheduled to continue until the 25th, the two space agencies are using the Robotic Refueling Module (RRM) and Canada's Special Purpose Dexterous Manipulator, or Dextre, robot to carry out simulated refueling operations. The purpose of these tests is to develop refueling methods aimed at extending the life of satellites and reducing the amount of space debris orbiting the Earth."
Space

Scientists Take Most Accurate Reading Yet of Universe's Cooling 91

Posted by samzenpus
from the you-feel-a-little-warm dept.
angry tapir writes "An international team of astronomers has used the CSIRO-run Australia Telescope Compact Array to measure the cooling of the universe since the Big Bang. According to the CSIRO, it is the most accurate reading yet of how hot the universe used to be. When the universe was half its current age its temperature was -267.92 degrees Celsius (5.08 Kelvin), the team found, which is warmer than today's universe (-270.27 degrees Celsius)."
Science

Male Scientists More Prone To Misconduct 300

Posted by Soulskill
from the it's-a-guy-thing dept.
sciencehabit writes "Male scientists — especially at the upper echelons of the profession — are far more likely than women to commit misconduct. That's the bottom line of a new analysis by three microbiologists of wrongdoing in the life sciences in the United States. Ferric Fang of the University of Washington, Seattle; Joan Bennett of Rutgers University; and Arturo Casadevall of Albert Einstein College of Medicine combed through misconduct reports on 228 people released by the U.S. Office of Research Integrity (ORI) over the last 19 years. They then compared the gender balance — or imbalance, in this case — against the mix of male and female senior scientists and trainees to gauge whether misconduct was more prevalent among men. A remarkable 88% of faculty members who committed misconduct were men, or 63 out of 72 individuals. The number of women in that group was one-third of what one would expect based on female representation in the life sciences."
Data Storage

Researchers Achieve Storage Density of 2.2 Petabytes Per Gram of DNA 136

Posted by Soulskill
from the nature-is-much-smarter-than-we-are dept.
SternisheFan sends news of researchers who encoded an MP3, a PDF, a JPG, and a TXT file into DNA, along with another file that explains the encoding. The researchers estimate the storage density of this technique at 2.2 petabytes per gram (abstract). "We knew we needed to make a code using only short strings of DNA, and to do it in such a way that creating a run of the same letter would be impossible. So we figured, let's break up the code into lots of overlapping fragments going in both directions, with indexing information showing where each fragment belongs in the overall code, and make a coding scheme that doesn't allow repeats. That way, you would have to have the same error on four different fragments for it to fail – and that would be very rare," said one of the study's authors. "We've created a code that's error tolerant using a molecular form we know will last in the right conditions for 10 000 years, or possibly longer," said another.
Space

Magnetic 'Braids' May Cook the Sun's Corona 32

Posted by Soulskill
from the i-would-like-mine-medium-rare-please dept.
astroengine writes "Scientists have long puzzled over why the surface of the sun is cooler than its corona, the outer hazy atmosphere visible during a solar eclipse. Now, thanks to a five-minute observation by a small, but very high-resolution ultraviolet telescope, they have some answers. Hi-C, which was launched aboard a suborbital rocket to study the sun without interference from Earth's atmosphere, revealed interwoven magnetic fields braided like hair. When the braids relaxed, they released energy, heating the corona (abstract). 'I had no idea we would see structures like that in the corona. Seeing these braids was very new to me,' astrophysicist Jonathan Cirtain with NASA's Marshall Space Flight Center in Huntsville, Ala., told Discovery News."
Biotech

Hidden Viral Gene Discovered In GMO Crops 391

Posted by Soulskill
from the food-is-tasty-in-proportion-to-how-much-it's-trying-to-kill-you dept.
Jeremiah Cornelius writes "Researchers with the European Food Safety Authority discovered variants of the Cauliflower mosaic virus 35S in the most widely harvested varieties of genetically-modified crops, including Monsanto's RoundupReady Soy and Maze. According to the researchers, Podevin and du Jardin, the particular 'Gene VI' is responsible for a number of possible consequences that could affect human health, including inhibition of RNA silencing and production of proteins with known toxicity. The EFSA is endorsing 'retrospective risk assessment' of CaMV promoter and its Gene VI sequences — in an attempt to give it a clean bill of health. It is unknown if the presence of the hidden viral genes were the result of laboratory contamination or a possible recombinant product of the resultant organism. There are serious implications for the production of GMO for foodstuffs, given either possibility."
Space

New Asteroid Mining Company Emerges 148

Posted by Soulskill
from the a-challenger-appears dept.
coondoggie writes "A new company intends by 2015 to send a fleet of tiny satellites to mine passing asteroids for high-value metals. Deep Space Industries Inc.'s asteroid mining proposal begins in 2015, when the company plans to send out a squadron of 55lb cubesats, called Fireflies, that will explore near-Earth space for two to six months looking for target asteroids. The company's CEO said, 'Using resources harvested in space is the only way to afford permanent space development. More than 900 new asteroids that pass near Earth are discovered every year. They can be like the Iron Range of Minnesota was for the Detroit car industry last century — a key resource located near where it was needed. In this case, metals and fuel from asteroids can expand the in-space industries of this century. That is our strategy.'"
Medicine

Bomb Blasts Alter Brain Lipid Levels 105

Posted by timothy
from the easily-treated-with-peanut-butter dept.
MTorrice writes "About 320,000 soldiers returning from the wars in Afghanistan and Iraq have struggled with neurological problems associated with traumatic brain injury, according to the Rand Corporation. Some veterans experience symptoms, such as memory loss and anxiety, without noticeable physical signs of brain injury. Now researchers report a possible chemical signature: Levels of a certain lipid spike in the brains of mice exposed to mild explosions (abstract; full article paywalled). This lipid could serve as a way to diagnose people who are at risk of developing neurological disorders after a blast, the scientists say."
Censorship

Islamist Hackers Shut Down Egyptology Research Journal 564

Posted by timothy
from the didn't-go-down-like-that dept.
An anonymous reader writes "Radical Islamist hackers have been harassing Egyptologist Kate Phizackerley's online journal Egyptological and her blog KV64. Phizackerley and her team finally got tired of it and shut their online work down. As blogger Roger Pearse says, 'A bunch of violent scumbags... who never have contributed in any way to the web, have successfully interfered with the scientific effort of the entire human race... Next year there will be more.' How do we route around damage like this?"
Science

One-of-a-Kind Chemistry Autograph Collection Goes Digital 16

Posted by timothy
from the look-for-an-original-walter-white dept.
carmendrahl writes "A science historian has collaborated with a publisher to digitize a one-of-a kind collection of chemists' signatures. In the shadow of World War II, a Japanese chemist named Tetsuo Nozoe traveled outside his land for the first time, and collected autographs from the people he met on the way. This turned into a forty year hobby, and a 1200-page collection. The digital collection sucks chemists in for hours — it's full of cartoons, jokes, haikus, and scribbles the signers admit to having scrawled 'in a drunken state.' Nobel Prizewinners and ordinary chemists signed side-by-side. The Nozoe notebook collection will be open access for at least three years, with a big goal being to identify all the 'mystery' signatures in the collection with help from readers."
Science

Bloggers Put Scientific Method To the Test 154

Posted by Unknown Lamer
from the like-mythbusters-but-with-science dept.
ananyo writes "Scrounging chemicals and equipment in their spare time, a team of chemistry bloggers is trying to replicate published protocols for making molecules. The researchers want to check how easy it is to repeat the recipes that scientists report in papers — and are inviting fellow chemists to join them. Blogger See Arr Oh, chemistry graduate student Matt Katcher from Princeton, New Jersey, and two bloggers called Organometallica and BRSM, have together launched Blog Syn, in which they report their progress online. Among the frustrations that led the team to set up Blog Syn are claims that reactions yield products in greater amounts than seems reasonable, and scanty detail about specific conditions in which to run reactions. In some cases, reactions are reported which seem too good to be true — such as a 2009 paper which was corrected within 24 hours by web-savvy chemists live-blogging the experiment; an episode which partially inspired Blog Syn. According to chemist Peter Scott of the University of Warwick in Coventry, UK, synthetic chemists spend most of their time getting published reactions to work. 'That is the elephant in the room of synthetic chemistry.'"
Science

Tour of the Deep Underground Science and Engineering Lab 35

Posted by Unknown Lamer
from the where-else-would-you-hide-the-stargate dept.
lukej writes "Over eleven years ago, the possibility of using the retired Homestake Mine as an underground science laboratory was first proposed. Today the local newspaper gives a science-filled tour of that facility, along with a short photo tour, and decent descriptions of some of the experiments it hosts (Majorana, LUX, Long Baseline Neutrino Experiment). Some fairly interesting deep, dirty, and real physical science!"
Earth

Earth May Have Been Hit By a Gamma-Ray Burst In 775 AD 157

Posted by samzenpus
from the charlemagne-smash! dept.
The Bad Astronomer writes "Studies of carbon-14 in Japanese trees and beryllium-10 in Antarctic ice indicate the Earth was hit by a big radiation blast in 775 AD. Although very rare, occurring only once every million years or so, the most likely culprit is a gamma-ray burst, a cosmic explosion accompanying the birth of a black hole. While a big solar flare is still in the running, a GRB from merging neutron stars produces the ratio of carbon and beryllium observed, and also can explain why no bright explosion was seen at the time, and no supernova remnant is seen now."

The universe is like a safe to which there is a combination -- but the combination is locked up in the safe. -- Peter DeVries

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