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Catch up on stories from the past week (and beyond) at the Slashdot story archive

Earth

Asteroid 2011 AG5 Will Miss Earth In 2040 143

Posted by timothy
from the 2039-on-the-other-hand dept.
dryriver writes with a report from CNN that the asteroid known as 2011 AG5 will not hit Earth in 2040 as early calculations had led some to fear when it was first spotted last year. "To narrow down the asteroid's future course, NASA put out a call for more observation. Astronomers from the University of Hawaii at Manoa took up the task and managed to observe the asteroid over several days in October. 'An analysis of the new data conducted by NASA's Near-Earth Object Program Office at the Jet Propulsion Laboratory in Pasadena, California, shows that the risk of collision in 2040 has been eliminated,' NASA declared Friday."
Medicine

Specific Gut Bacteria May Account For Much Obesity 470

Posted by timothy
from the what-you-need-is-a-transplant-of-the-right-kind dept.
resistant writes "A limited study from China offers the tantalizing possibility that targeting specific gut bacteria in humans could significantly reduce the scope of an epidemic of obesity in Western countries: 'The endotoxin-producing Enterobacter decreased in relative abundance from 35% of the volunteer's gut bacteria to non-detectable, during which time the volunteer lost 51.4kg of 174.8kg initial weight and recovered from hyperglycemia and hypertension after 23 weeks on a diet of whole grains, traditional Chinese medicinal foods and prebiotics.' As usual, sensationalist reports have been exaggerating the import of this very early investigation, and one wonders about that 'diet of whole grains.' Still, there could be meat in the idea of addressing pathogenic bacteria for the control of excessive weight gain. After all, it wasn't too long ago that a brave scientist insisted in the face of widespread ridicule that peptic ulcers in humans usually are caused by bacterial infections, not by acidic foods."
Math

Juggling By the Numbers 59

Posted by timothy
from the first-they-came-for-the-tab-sites dept.
theodp writes "The BBC News' Laura Gray reports on a juggling notation system developed in the 80's called Siteswap (aka Quantum Juggling and Cambridge Notation) and how it has helped jugglers discover and share thousands of new tricks. Frustrated that there was no way to write down juggling moves, mathematician Colin Wright and others helped devised Siteswap, which uses sequences of numbers to encode the number of beats of each throw, which is related to their height and the hand to which the throw is made. 'Siteswap has allowed jugglers to share tricks with each other without having to meet in person or film themselves,' says James Grime, juggling enthusiast and math instructor for Cambridge University. Still unclear on the concept? Spend some time playing around with Paul Klimek's most-excellent Quantum Juggling simulator, and you too can be a Flying Karamazov Brother!"
Space

All Systems Go For Highest Altitude Supercomputer 36

Posted by Soulskill
from the going-for-the-high-score dept.
An anonymous reader writes "One of the most powerful supercomputers in the world has now been fully installed and tested at its remote, high altitude site in the Andes of northern Chile. It's a critical part of the Atacama Large Millimeter/submillimeter Array (ALMA), the most elaborate ground-based astronomical telescope in history. The special-purpose ALMA correlator has over 134 million processors and performs up to 17 quadrillion operations per second, a speed comparable to the fastest general-purpose supercomputer in operation today."
Medicine

Polio Eradication Program Suspended In Pakistan After Aid Workers Shot 223

Posted by Soulskill
from the got-to-be-kidding-me dept.
Hugh Pickens writes "Jamal Khan reports that the United Nations has suspended its polio vaccination drive in Pakistan after eight people involved in the effort were shot dead in the past few days. The killings dealt a grave blow to the drive to bring an end to the scourge of polio in Pakistan, one of only three countries where the crippling disease still survives. Militants accuse health workers of acting as spies for the U.S. and claim the vaccine makes children sterile. Taliban commanders in the troubled northwest tribal region have also said vaccinations can't go forward until the U.S. stops drone strikes in the country. Insurgent opposition to the campaign grew last year after it was revealed that a Pakistani doctor ran a fake polio vaccination program to help the CIA track down and kill Osama bin Laden, who was hiding in the town of Abbottabad in the country's northwest. The Pakistani government has condemned the attacks against aid workers, saying they deprive Pakistan's most vulnerable populations — specifically children — of basic life-saving health interventions. A total of 56 polio cases have been reported in Pakistan during 2012, down from 190 the previous year, according to the U.N. Most of the new cases in Pakistan are in the northwest, where the presence of militants makes it difficult to reach children. Clerics and tribal elders were recruited to support polio vaccinations in an attempt to open up areas previously inaccessible to health workers. 'This is undoubtedly a tragic setback,' says UNICEF spokeswoman Sarah Crowe, 'but the campaign to eradicate polio will and must continue.'"
The Military

Who Should Manage the Nuclear Weapons Complex, Civilians Or Military? 183

Posted by Soulskill
from the can't-we-just-outsource-it dept.
Lasrick writes "For the first time since 1946, Congress is seriously debating whether the U.S. nuclear weapons complex should be under civilian or military control. That the article is in the Bulletin of Atomic Scientists is significant, as it was many of the scientists who founded BAS who argued for civilian control in the wake of Hiroshima and Nagasaki. They believed that atomic energy was too destructive, and the military too secretive, which would possibly thwart scientific discovery and erect a major obstacle to international control and cooperation. The article talks about how management has changed over the decades and explains the discussion that needs to happen before Congress acts."
NASA

New NASA Spacesuit Looks Like Buzz Lightyear's 81

Posted by Soulskill
from the to-copyright-infringement-and-beyond dept.
SternisheFan sends this excerpt from Space.com: It might make the astronaut wearing it look like a real-life Buzz Lightyear, but a new prototype spacesuit that NASA just finished testing represents the first major overhaul in spacesuit technology since 1998. Flexible, white, and lime green accented, the suit — known as the Z-1 — is designed not only to help astronauts comfortably maneuver during spacewalks in microgravity, but also to deftly move about when walking on the surface of a planet or other smaller heavenly body, like an asteroid. [Engineer Amy Ross] said, 'the shuttle EMU splits at the waist and you put pants on and you put the top on separately and they connect in the middle. Whereas with this suit, the subject crawls in through the back, and then we just shut the door.' Creating a back-entry suit solves a few of the problems spacewalkers often face during trips to the International Space Station. Using airlocks to depressurize is a time consuming, exhausting process. By using a back-entry design, the astronauts won't need to go through an airlock at all. The suit hooks up to the outside of the spacecraft using the "space port" opening, and the spacewalker simply climbs in and detaches."
Medicine

Human Cloning Possible Within 50 Years, Nobel Prize-Winning Scientist Claims 233

Posted by samzenpus
from the me-and-more-me dept.
An anonymous reader writes in with a story about the possibility of having another you in the future. "Human cloning could happen within the next half century, claims a Nobel Prize-winning scientist. Sir John Gurdon, the British developmental biologist whose research cloning frogs in the 1950s and 60s led to the later creation of Dolly the sheep in 1996, believes that human cloning could happen within the next 50 years. He said that parents who lose their children to tragic accidents might be able to clone replacements in the next few decades. Gurdon, who won this year's Nobel Prize for Physiology or Medicine, said that while any attempts to clone a human would likely raise complex ethical issues, he believes that in the near future people would overcome their concerns if cloning became medically useful."
Idle

Your Hands Were Made For Punching According To New Study 240

Posted by samzenpus
from the here's-something-for-your-eye dept.
They are capable of delicate surgery, creating beautiful works of art, and comforting someone feeling down, but according to a new study your hands evolved to smash someone in the face. From the article: "Human hands evolved so that men could make fists and fight, and not just for manual dexterity, new research finds. The study, published in the Journal of Experimental Biology, adds to a growing body of evidence that humans are among the most aggressive and violent animals on the planet. 'With the notable exception of bonobos, great apes are a relatively aggressive group of mammals,' lead author David Carrier told Discovery News. 'Although some primatologists may argue that chimpanzees are the most aggressive apes, I think the evidence suggests that humans are substantially more violent.''"
Science

MIT Research Shows New Magnetic State That Could Aid Quantum Computing 49

Posted by samzenpus
from the a-new-spin-on-things dept.
alphadogg writes "Researchers at MIT and other institutions have demonstrated a new type of magnetism, only the third kind ever found, and it may find its way into future communications, computing and data storage technologies. Working with a tiny crystal of a rare mineral that took 10 months to make, the researchers for the first time have demonstrated a magnetic state called a QSL (quantum spin liquid), according to MIT physics professor Young Lee. He is the lead author of a paper on their findings, which is set to be published in the journal Nature this week (abstract). Theorists had said QSLs might exist, but one had never been demonstrated before. 'We think it's pretty important,' Lee said, adding that he would let his peers be the ultimate judges."
Math

TI-84+C-Silver Edition: That C Stands For Color 198

Posted by samzenpus
from the graphing-cool dept.
skade88 writes "Do you remember those large TI-8X line of calculators with a BW display from when you were growing up and learning all about math? Yeah well, you can still get them because TI has yet to update or change their line of TI-8X calculators from their 96x64 display, processors designed in the 1980s with just a few kilobytes of user accessible memory. They still cost in the $100.00 to $150.00 range. That is all about to change now that the TI-8X line of calculators is 22 years old. Their new TI-84+C-Silver edition will come with a 320x240 16-bit color display, 3.5MB of flash ROM, and 21KB of RAM. Ars has a good preview of the device along with speculation on why it took so so so very long for TI to finally bring calculators up to a level of technology that could have been delivered a decade ago."Last month some photos and a few details of the new TI-84+C were leaked.
Science

Researchers Create Ultrastretchable Wires Using Liquid Metal 94

Posted by samzenpus
from the keep-it-stretching dept.
hypnosec writes "By using liquid metal researchers have created wires that can stretch up to eight times their original length while retaining their conduction properties. Scientists over at North Carolina State University made the stretchable wires by filling in a tube made out of an extremely elastic polymer with gallium and an indium liquid metal alloy."
Space

Ask Slashdot: How Would You Build a Microsatellite? 117

Posted by samzenpus
from the your-own-personal-satellite dept.
Dishwasha writes "A fellow co-worker of mine turned me on to CubeSat; apparently there are commercial space companies that will launch CubeSat systems from their payload for a modest fee. Is anybody in the /. community involved in amateur microsatellite systems? How would I go about getting involved at an amateur level? Are there any amateur user groups and meetups I can join? I have limited background in all the prerequisites but am eager to learn even if it takes a lifetime. Any links to design and engineering of satellites would be appreciated."
Science

IQ 'a Myth,' Study Says 530

Posted by Soulskill
from the guess-we-need-a-new-metric-for-feeling-superior-to-others dept.
An anonymous reader send this quote from The Star: "The idea that intelligence can be measured by a single number — your IQ — is wrong, according to a recent study led by researchers at the University of Western Ontario (abstract). The study, published in the journal Neuron on Wednesday, involved 100,000 participants around the world taking 12 cognitive tests, with a smaller sample of the group undergoing simultaneous brain-scan testing. 'When we looked at the data, the bottom line is the whole concept of IQ — or of you having a higher IQ than me — is a myth,' said Dr. Adrian Owen, the study’s senior investigator... 'There is no such thing as a single measure of IQ or a measure of general intelligence.'"
Power

Is Safe, Green Thorium Power Finally Ready For Prime Time? 258

Posted by Soulskill
from the much-more-reliable-than-Thor-power dept.
MrSeb writes "If you've not been tracking the thorium hype, you might be interested to learn that the benefits liquid fluoride thorium reactors (LFTRs) have over light water uranium reactors (LWRs) are compelling. Alvin Weinberg, who invented both, favored the LFTR for civilian power since its failures (when they happened) were considerably less dramatic — a catastrophic depressurization of radioactive steam, like occurred at Chernobyl in 1986, simply wouldn't be possible. Since the technical hurdles to building LFTRs and handling their byproducts are in theory no more challenging, one might ask — where are they? It turns out that a bunch of U.S. startups are investigating the modern-day viability of thorium power, and countries like India and China have serious, governmental efforts to use LFTRs. Is thorium power finally ready for prime time?"

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