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NASA

NASA's JPL Develops Multi-Metal 3D Printing Process 32

Posted by timothy from the just-use-a-photoshop-gradient dept.
yyzmcleod (1534129) writes The technology to 3D print a single part from multiple materials has been around for years, but only for polymer-based additive manufacturing processes. For metals, jobs are typically confined to a single powdered base metal or alloy per object. However, researchers at NASA's Jet Propulsion Laboratory say they have developed a 3D printing technique that allows for print jobs to transition from one metal to another in a single object. From the article: In JPL’s technique, the build material’s composition is gradually transitioned as the print progresses. For example, the powdered build material might contain 97 percent titanium alloy and 3 percent stainless steel at the beginning of the transition. Then, in 1 percent increments between layers, the gradient progresses to 97 percent stainless steel and 3 percent Ti alloy by some defined point in the overall 3D printing process.
Technology

Student Uses Oculus Rift and Kinect To Create Body Swap Illusion 88

Posted by timothy from the why-are-you-hitting-yourself dept.
kkleiner writes Using an Oculus Rift virtual reality headset, Microsoft Kinect, a camera, and a handful of electrical stimulators, a London student's virtual reality system is showing users what it's like to swap bodies. Looking down, they see someone else's arms and legs; looking out, it's someone else's point of view; and when they move their limbs, the body they see does the same (those electrical stimulators mildly shock muscles to force a friend to mirror the user's movements). It's an imperfect system, but a fascinating example of the power of virtual reality. What else might we use VR systems for? Perhaps they'll prove useful in training or therapeutic situations? Or what about with robots, which would be easier to inhabit and control than another human? The virtual body swap may never fully catch on, but generally, virtual reality will likely prove useful for more than just gaming and entertainment.
Science

More Quantum Strangeness: Particles Separated From Their Properties 144

Posted by Soulskill from the superposition-of-cat-metaphors dept.
Dupple sends word of new quantum mechanical research in which a neutron is sent along a different path from one of its characteristics. First, a neutron beam is split into two parts in a neutron interferometer. Then the spins of the two beams are shifted into different directions: The upper neutron beam has a spin parallel to the neutrons’ trajectory, the spin of the lower beam points into the opposite direction. After the two beams have been recombined, only those neutrons are chosen which have a spin parallel to their direction of motion. All the others are just ignored. ... These neutrons, which are found to have a spin parallel to its direction of motion, must clearly have travelled along the upper path — only there do the neutrons have this spin state. This can be shown in the experiment. If the lower beam is sent through a filter which absorbs some of the neutrons, then the number of the neutrons with spin parallel to their trajectory stays the same. If the upper beam is sent through a filter, than the number of these neutrons is reduced.

Things get tricky when the system is used to measure where the neutron spin is located: the spin can be slightly changed using a magnetic field. When the two beams are recombined appropriately, they can amplify or cancel each other. This is exactly what can be seen in the measurement, if the magnetic field is applied at the lower beam – but that is the path which the neutrons considered in the experiment are actually never supposed to take. A magnetic field applied to the upper beam, on the other hand, does not have any effect.

Submission + - Marc Andreessen gets a lesson in humility. (gawker.com)

Submitted by statemachine
statemachine writes: Marc Andreessen, while promoting Facebook (using his Twitter account to do so) attracted a random heckler and shot back, "Yep, yours was so much better. Wait, which one was that again?"

"Twitter," came the reply.
Medicine

Smoking Mothers May Alter the DNA of Their Children 155

Posted by Unknown Lamer from the that-explains-the-hooves dept.
sciencehabit (1205606) writes "Pregnant women who smoke don't just harm the health of their baby—they may actually impair their child's DNA, according to new research. A genetic analysis shows that the children of mothers who smoke harbor far more chemical modifications of their genome — known as epigenetic changes — than kids of non-smoking mothers. Many of these are on genes tied to addiction and fetal development. The finding may explain why the children of smokers continue to suffer health complications later in life.
Bug

Linus Torvalds: "GCC 4.9.0 Seems To Be Terminally Broken" 739

Posted by timothy from the you'll-never-believe-what-he-actually-said dept.
hypnosec (2231454) writes to point out a pointed critique from Linus Torvalds of GCC 4.9.0. after a random panic was discovered in a load balance function in Linux 3.16-rc6. in an email to the Linux kernel mailing list outlining two separate but possibly related bugs, Linus describes the compiler as "terminally broken," and worse ("pure and utter sh*t," only with no asterisk). A slice: "Lookie here, your compiler does some absolutely insane things with the spilling, including spilling a *constant*. For chrissake, that compiler shouldn't have been allowed to graduate from kindergarten. We're talking "sloth that was dropped on the head as a baby" level retardation levels here .... Anyway, this is not a kernel bug. This is your compiler creating completely broken code. We may need to add a warning to make sure nobody compiles with gcc-4.9.0, and the Debian people should probably downgrate their shiny new compiler."
Encryption

Russia Posts $110,000 Bounty For Cracking Tor's Privacy 98

Posted by Soulskill from the what-happens-in-siberia-stays-in-siberia dept.
hypnosec writes: The government of Russia has announced a ~$110,000 bounty to anyone who develops technology to identify users of Tor, an anonymising network capable of encrypting user data and hiding the identity of its users. The public description (in Russian) of the project has been removed now and it only reads "cipher 'TOR' (Navy)." The ministry said it is looking for experts and researchers to "study the possibility of obtaining technical information about users and users' equipment on the Tor anonymous network."

Comment Re:Let's get one thing straight: (Score 1) 342

You're incorrect on calling me incorrect.

"The Speaker is responsible for ensuring that the House passes legislation supported by the majority party. In pursuing this goal, the Speaker may use his or her power to determine when each bill reaches the floor."
http://en.wikipedia.org/wiki/S...

Please, people. Learn your civics.
Wikipedia

Wikipedia Blocks 'Disruptive' Edits From US Congress 165

Posted by Soulskill from the history-no-longer-written-by-the-victors dept.
alphatel writes: Wikipedia has blocked anonymous edits from a congressional IP address for 10 days because of "disruptive" behavior. These otherwise anonymous edits were brought to light recently by @Congressedits, a bot that automatically tweets Wikipedia changes that come from Congressional IP addresses. The biography of former U.S. defense secretary Donald Rumsfeld was edited to say that he was an "alien lizard who eats Mexican babies." Mediaite's Wikipedia page was modified to label the site as a "sexist transphobic" publication.
Earth

Earth In the Midst of Sixth Mass Extinction: the 'Anthropocene Defaunation' 342

Posted by Soulskill from the i-blame-the-schools dept.
mspohr writes: A special issue of Science magazine devoted to 'Vanishing Fauna' publishes a series of articles about the man-caused extinction of species and the implications for ecosystems and the climate. Quoting: "During the Pleistocene epoch, only tens of thousands of years ago, our planet supported large, spectacular animals. Mammoths, terror birds, giant tortoises, and saber-toothed cats, as well as many less familiar species such as giant ground sloths (some of which reached 7 meters in height) and glyptodonts (which resembled car-sized armadillos), roamed freely. Since then, however, the number and diversity of animal species on Earth have consistently and steadily declined. Today we are left with a relatively depauperate fauna, and we continue to lose animal species to extinction rapidly. Although some debate persists, most of the evidence suggests that humans were responsible for extinction of this Pleistocene fauna, and we continue to drive animal extinctions today through the destruction of wild lands, consumption of animals as a resource or a luxury, and persecution of species we see as threats or competitors." Unfortunately, most of the detail is behind a paywall, but the summary should be enough to get the point across.
Transportation

Will Your Next Car Be Covered In Morphing Dimples? 138

Posted by samzenpus from the slicing-down-the-highway dept.
cartechboy writes Golfing and cars, not much in common there. But that's about to change thanks to a new technology from a research lab at MIT called Smorphs. The idea is simple: put a set of dynamic dimples on the exterior of a car to improve its surface aerodynamics and make it slipperier, and therefore faster. Pedro Reis is the mechanical engineering and research spearheading this project. A while ago Mythbusters proved the validity of the dimpled car form in a much more low-tech way. The concept uses a hollow core surrounded by a thick, deformable layer, and a smoother outer skin. When vacuum is applied, the outer layers suck in to form the dimples. The technology is only in its very earliest stages, but we could see this applied to future vehicles in an effort to make them faster and more fuel efficient.

Comment Re:Let's get one thing straight: (Score 3, Informative) 342

Your link says:

218 Republicans voted for, 159 Democrats voted against.

So a few Democrats and Republicans breaking ranks does not make this bipartisan. Clearly this is a deeply partisan issue.

You also forget to mention that not one single bill can be voted on unless the Speaker of the House, Republican John Boehner, says it can be voted on.

So, how is this bipartisan again? It was a Republican bill, passed with a Republican majority. Welcome to politics.
Japan

One Trillion Bq Released By Nuclear Debris Removal At Fukushima So Far 190

Posted by samzenpus from the spreading-the-glow dept.
AmiMoJo writes The operator of the damaged Fukushima Daiichi nuclear plant says more than one trillion becquerels of radioactive substances were released as a result of debris removal work at one of the plant's reactors. Radioactive cesium was detected at levels exceeding the government limit in rice harvested last year in Minami Soma, some 20 kilometers from Fukushima Daiichi. TEPCO presented the Nuclear Regulation Authority with an estimate that the removal work discharged 280 billion becquerels per hour of radioactive substances, or a total of 1.1 trillion becquerels. The plant is believed to be still releasing an average of 10 million becquerels per hour of radioactive material.

Submission + - Is our Universe left-handed?

Submitted by StartsWithABang
StartsWithABang writes: We generally think of the laws of physics as symmetric: there's no preferred location or direction in the Universe that's more physically valid than any other. And yet, there are some fundamental asymmetries: matter dominates over antimatter, muons decay in one direction and not the other 99.9% of the time, and left-handed spiral galaxies are more common than right-handed one. What, didn't know that last one? Turns out that's a real effect, and it's been noticed in more than one study. But is the fault in the stars, or is it ours?

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