Forgot your password?

Want to read Slashdot from your mobile device? Point it at and keep reading!


Scientists Baffled By Unknown Source of Ozone-Depleting Chemical 250

Posted by Soulskill
from the i-blame-the-schools dept.
schwit1 writes: Scientists have found that, despite a complete ban since 2007, ozone-depleting chemicals are still being pumped into the atmosphere from some unknown source. "Carbon tetrachloride (CCl4), which was once used in applications such as dry cleaning and as a fire-extinguishing agent, was regulated in 1987 under the Montreal Protocol along with other chlorofluorocarbons that destroy ozone and contribute to the ozone hole over Antarctica. Parties to the Montreal Protocol reported zero new CCl4 emissions between 2007-2012. However, the new research shows worldwide emissions of CCl4 average 39 kilotons (about 43,000 U.S. tons) per year, approximately 30 percent of peak emissions prior to the international treaty going into effect. "We are not supposed to be seeing this at all," said Qing Liang, an atmospheric scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, and lead author of the study published online in the Aug. 18 issue of Geophysical Research Letters, a journal of the American Geophysical Union. "It is now apparent there are either unidentified industrial leakages, large emissions from contaminated sites, or unknown CCl4 sources."

Scientists Find Traces of Sea Plankton On ISS Surface 112

Posted by Soulskill
from the space-stations-like-to-swim dept.
schwit1 sends this report from the ITAR-TASS News Agency: An experiment of taking samples from illuminators and the ISS surface has brought unique results, as scientists had found traces of sea plankton there, the chief of an orbital mission on Russia's ISS segment told reporters. Results of the scope of scientific experiments which had been conducted for a quite long time were summed up in the previous year, confirming that some organisms can live on the surface of the International Space Station for years amid factors of a space flight, such as zero gravity, temperature conditions and hard cosmic radiation. Several surveys proved that these organisms can even develop. He noted that it was not quite clear how these microscopic particles could have appeared on the surface of the space station.

Modular Hive Homes Win Mars Base Design Competition 60

Posted by Soulskill
from the i'll-order-a-dozen dept.
In June, we discussed news that JPL and MakerBot were teaming up to host a competition for designing a futuristic Mars base. The competition is now over, and the top three designs have been chosen. First place went to Noah Hornberger, who designed a base with hexagonal rooms and shielding made of depleted uranium. Second place went to a martian pyramid with an aquaponics system on top, mirror-based solar collectors, central water storage, and compartmentalized living spaces. The third place award went to Chris Starr for his Mars Acropolis, which was styled upon the ancient Greek Acropolis. It has a water tower at the top of the structure, a series of greenhouses at the bottom, and living quarters in between. The full list of 227 entries is browse-able on Thingiverse.

Machine Vision Reveals Previously Unknown Influences Between Great Artists 74

Posted by samzenpus
from the spilled-like-pollock dept.
KentuckyFC writes Art experts look for influences between great masters by studying the artist's use of space, texture, form, shape, colour and so on. They may also consider the subject matter, brushstrokes, meaning, historical context and myriad other factors. So it's easy to imagine that today's primitive machine vision techniques have little to add. Not so. Using a new technique for classifying objects in images, a team of computer scientists and art experts have compared more than 1700 paintings from over 60 artists dating from the early 15th century to the late 20 the century. They've developed an algorithm that has used these classifications to find many well known influences between artists, such as the well known influence of Pablo Picasso and George Braque on the Austrian symbolist painter Gustav Klimt, the influence of the French romantic Delacroix on the French impressionist Bazille, the Norwegian painter Munch's influence on the German painter Beckmann and Degas' influence on Caillebotte. But the algorithm also discovered connections that art historians have never noticed (judge the comparisons for yourself). In particular, the algorithm points out that Norman Rockwell's Shuffleton's Barber Shop painted in 1950 is remarkably similar to Frederic Bazille's Studio 9 Rue de la Condamine painted 80 years before.

No, a Huge Asteroid Is Not "Set To Wipe Out Life On Earth In 2880" 118

Posted by samzenpus
from the it's-the-end-of-the-world-or-not dept.
An anonymous reader writes "Phil Plait wants you to know that asteroid 1950 DA is very, very unlikely to hit the Earth in 2880, despite what you may have read. He writes: "As it happens, 1950 DA is what's called a 'near-Earth asteroid', because its orbit sometimes brings it relatively close to Earth. I'll note that I mean close on a cosmic scale. Looking over the next few decades, a typical pass is tens of millions of kilometers away, with some as close as five million kilometers — which is still more than ten times farther away than the Moon! Still, that's in our neighborhood, which is one of the reasons this asteroid is studied so well. It gets close enough that we can get a decent look at it when it passes. Can it impact the Earth? Yes, kindof. Right now, the orbit of the asteroid doesn't bring it close enough to hit us. But there are forces acting on asteroids over time that subtly change their orbits; one of them is called the YORP effect, a weak force that arises due to the way the asteroid spins and radiates away heat. The infrared photons it emits when it's warm carry away a teeny tiny bit of momentum, and they act pretty much like an incredibly low-thrust rocket. Over many years, this can change both the rotation of the asteroid as well as the shape of its orbit."

ISS Earth at Night Photos Crowdsourced For Science 13

Posted by samzenpus
from the worth-a-thousand-words dept.
teleyinex writes The Complutense University of Madrid (UCM) is leading a project called Cities at Night to catalog the images taken by astronauts from the ISS. The project uses the platform Crowdcrafting powered by the open source software PyBossa to catalog images in cities, stars or other objects, as well as geo-reference them."

Is Dolby Atmos a Flop For Home Theater Like 3DTV Was? 197

Posted by Soulskill
from the audiophiles-despair dept.
An anonymous reader writes: Object-based audio is supposed to be the future of surround sound. The ability to pan sound around the room in 3D space as opposed to fixed channel assignments of yesterday's decoders. While this makes a lot of sense at the cinema, it's less likely consumers rush to mount speakers on their ceilings or put little speaker modules on top of their existing ones to bounce sound around the room. ">Leading experts think this will be just a fad like 3DTV was. What do you think?

Why the Universe Didn't Become a Black Hole 109

Posted by Soulskill
from the would-have-been-a-bit-dull dept.
StartsWithABang writes: With some 10^90 particles in the observable Universe, even stretched across 92 billion light-years today, the Universe is precariously close to recollapsing. How, then, is it possible that back in the early stages after the Big Bang, when all this matter-and-energy was concentrated within a region of space no bigger than our current Solar System, the Universe didn't collapse down to a black hole? Not only do we have the explanation, but we learn that even if the Universe did recollapse, we wouldn't get a black hole at all!

The Flight of Gifted Engineers From NASA 160

Posted by Soulskill
from the when-NASA-starts-looking-like-the-USPTO dept.
schwit1 writes: Rather than work in NASA, the best young engineers today are increasingly heading to get jobs at private companies like SpaceX and XCOR. This is a long article, worth reading in its entirety, but this quote sums it up well: "As a NASA engineering co-op student at Johnson Space Center, Hoffman trained in various divisions of the federal space agency to sign on eventually as a civil servant. She graduated from college this year after receiving a generous offer from NASA, doubly prestigious considering the substantial reductions in force hitting Johnson Space Center in recent months. She did have every intention of joining that force — had actually accepted the offer, in fact — when she received an invitation to visit a friend at his new job with rising commercial launch company SpaceX.

Hoffman took him up on the offer, flying out to Los Angeles in the spring for a private tour. Driving up to the SpaceX headquarters, she was struck by how unassuming it was, how small compared to NASA, how plain on the outside and rather like a warehouse. As she walked through the complex, she was also surprised to find open work areas where NASA would have had endless hallways, offices and desks. Hoffman described SpaceX as resembling a giant workshop, a hive of activity in which employees stood working on nitty-gritty mechanical and electrical engineering. Everything in the shop was bound for space or was related to space. ... Seeing SpaceX in production forced Hoffman to acknowledge NASA might not be the best fit for her. The tour reminded her of the many mentors who had gone into the commercial sector of the space industry in search of better pay and more say in the direction their employers take." At NASA, young engineers find that they spend a lot of time with bureaucracy, the pace is slow, their projects often get canceled or delayed, and the creative job satisfaction is poor. At private companies like SpaceX, things are getting built now.

Ryan Lackey, Marc Rogers Reveal Inexpensive Tor Router Project At Def Con 38

Posted by timothy
from the widespread-and-easy-are-tightly-linked dept.
An anonymous reader writes Ryan Lackey of CloudFlare and Marc Rogers of Lookout revealed a new OPSEC device at Def Con called PORTAL (Personal Onion Router to Assure Liberty). It "provides always-on Tor routing, as well as 'pluggable' transport for Tor that can hide the service's traffic signature from some deep packet inspection systems." In essence, PORTAL is a travel router that the user simply plugs into their existing device for more than basic Tor protection (counterpoint to PogoPlug Safeplug and Onion Pi). On the down side, you have to download PORTAL from Github and flash it "onto a TP-Link compatible packet router." The guys behind the device acknowledge that not many people may want to (or even know how to) do that, so they're asking everyone to standby because a solution is pending. The project's GitHub page has a README file that lists compatible models, with some caveats: "It is highly recommended to use a modified router. The modified MR11U and WR703N provide a better experience than the stock routers due to the additional RAM. The severe space constraints of the stock router make them very challenging to work with. Due to the lack of usable space, it is necessary to use an external disk to store the Tor packages. The stock router has only a single USB port, and the best option is to use a microSD in a 3G modem." (Note: Lackey is no stranger to helping people secure internet privacy.)

Historians Rediscover Einstein's Forgotten Model of the Universe 35

Posted by samzenpus
from the rough-draft dept.
KentuckyFC writes In 1931, after a 3- month visit to the U.S., Einstein penned a little known paper that attempted to show how his theory of general relativity could account for some of the latest scientific evidence. In particular, Einstein had met Edwin Hubble during his trip and so was aware of the latter's data indicating that the universe must be expanding. The resulting model is of a universe that expands and then contracts with a singularity at each end. In other words, Einstein was studying a universe that starts with a big bang and ends in a big crunch. What's extraordinary about the paper is that Einstein misspells Hubble's name throughout and makes a number of numerical errors in his calculations. That's probably because he wrote the paper in only 4 days, say the historians who have translated it into English for the time. This model was ultimately superseded by the Einstein-de Sitter model published the following year which improves on this in various ways and has since become the workhorse of modern cosmology.

Entire South Korean Space Programme Shuts Down As Sole Astronaut Quits 186

Posted by samzenpus
from the take-this-job-and-launch-it dept.
An anonymous reader writes The entire South Korean space program has been forced to shut down after its only astronaut resigned for personal reasons. Yi So-yeon, 36, became the first Korean in space in 2008 after the engineer was chosen by the Korea Aerospace Research Institute (KARI) to lead the country's $25m space project. Her resignation begs questions of KARI regarding whether she was the right person to lead the program and whether the huge cost of sending her into space was a waste of taxpayer's money.

Why Hasn't This Asteroid Disintegrated? 74

Posted by Soulskill
from the this-is-glue.-strong-stuff. dept.
sciencehabit writes: Planetary scientists have found an asteroid spinning too fast for its own good. The object, known as 1950 DA, whips around every 2.1 hours, which means that rocks on its surface should fly off into space. What's keeping the remaining small rocks and dust on the surface? The researchers suggest van der Waals forces, weak forces caused by the attraction of polar molecules, which have slightly different charges on different sides of the molecule. For example, water molecules exhibit surface tension because of van der Waals forces, because the negative charge of one water molecule's oxygen atom is attracted to nearby water molecules' hydrogen atoms, which have a positive charge at their surfaces. Similar attractions could be occurring between molecules on the surfaces of different pieces of dust and rock. Such forces would be comparable to those that caused lunar dust to stick to astronauts' space suits.

NASA's Greenhouse Gas Observatory Captures 'First Light' 143

Posted by Unknown Lamer
from the captain-planet-will-find-you dept.
mdsolar (1045926) writes with news that NASA's second attempt to launch a satellite to map carbon dioxide levels across the globe succeeded, and its instruments are operating properly. From the article: NASA's first spacecraft dedicated to studying Earth's atmospheric climate changing carbon dioxide levels and its carbon cycle has reached its final observing orbit and taken its first science measurements as the leader of the world's first constellation of Earth science satellites known as the International 'A-Train. The Orbiting Carbon Observatory-2 (OCO-2) is a research satellite tasked with collecting the first global measurements of atmospheric carbon dioxide (CO2) — the leading human-produced greenhouse gas and the principal human-produced driver of climate change. The 'first light' measurements were conducted on Aug. 6 as the observatory flew over central Papua New Guinea and confirmed the health of the science instrument.

3 Congressmen Trying To Tie Up SpaceX 391

Posted by Soulskill
from the can't-you-go-back-to-not-passing-legislation dept.
An anonymous reader writes: Phil Plait reports that a trio of U.S. Congressmen are asking NASA to investigate what they call "an epidemic of anomalies" at SpaceX. They sent a memo (PDF) demanding that SpaceX be held accountable to taxpayers for mission delays stemming from the development of new rockets. Plait notes, "[A]s a contractor, the rules are different for them than they would be if NASA themselves built the rockets, just as the rules are for Boeing or any other contractor. In fact, as reported by Space News, NASA didn't actually pay for the development of the Falcon 9; Elon Musk did." He adds, "Another reason this is silly is that every rocket ever made has undergone problems; they are fiendishly complex machines and no design has ever gotten from the drafting board to the launch pad without issues. Sure, SpaceX has experienced launch delays and other problems, but the critical thing to remember is that those problems are noted, assessed, and fixed sometimes within hours or minutes." Plait accuses the congressmen of trying to bury private spaceflight under red tape in order to protect established industries in their own states.

Google's Satellites Could Soon See Your Face From Space 140

Posted by Unknown Lamer
from the google-face-view dept.
Jason Koebler (3528235) writes Two months ago, after much lobbying by the biggest satellite company in North America, DigitalGlobe, the US government relaxed restrictions to allow for commercially available satellite imagery up to 25 cm resolution—twice as detailed as the previous limit of 50 cm.
The DigitalGlobe's Worldview-3, the first commercial satellite set to capture these high-res images is set to launch this Wednesday. Six months after that, private businesses, including its regular client Google, will be able to get their hands on hyper-detailed photos and videos of the globe.

Do Dark Matter and Dark Energy Cast Doubt On the Big Bang? 224

Posted by timothy
from the hey-man-it's-just-a-theory dept.
StartsWithABang (3485481) writes "Back in the 1960s, after the discovery of the Cosmic Microwave Background, the Big Bang reigned supreme as the only game in town. But back then, we also assumed that what we consider as "normal matter" — i.e., protons, neutrons and electrons — was, along with photons and neutrinos, the only stuff that made up the Universe. But the last 50 years have shown us that dark matter and dark energy actually make up 95% of the energy composition of our cosmos. Given that, is there any wiggle room to possibly invalidate the Big Bang?"

Old School Sci-fi Short Starring Keir Dullea Utilizes Classic Effects 91

Posted by timothy
from the we-call-them-godzilla-strings dept.
New submitter Wierzbowski85 (2852925) writes Indie Kickstarter-funded sci-fi short HENRi features classic visual effects and storytelling – with a twist. As detailed in Cinefex magazine (issue 134), the film itself utilizes a mixture of the old and the new — combining live-action sequences with puppetry, quarter-scale miniatures, and modern CGI. Speaking with Wired, the film's director said: "The goal was to seamlessly integrate these different techniques to create the world. My philosophy is that effects are merely a tool to help the story, and that in mind, we used pretty much every trick in the book." The film also stars genre legend Keir Dullea, of 2001: A Space Odyssey. In a making-of video for the film, Dullea says, "Having done 2001, [HENRi] was a wonderful homage to Stanley Kubrick and that film." The short is now available for free viewing online at Hulu.

Imitation is the sincerest form of plagarism.