Joe, an engineer from Wisconsin, modified the (now censored) designs for Defense Distributed's 3D printed gun, the Liberator, and printed a working model on a Lulzbot A0-101, a $1,725 consumer printer that is much cheaper and more widely available than the Stratasys Dimension SST printer used by Defense Distributed.
The gun printed by Joe, which he’s nicknamed the “Lulz Liberator,” was printed over 48 hours with just $25 of plastic on a desktop machine affordable to many consumers, and was fired far more times. “People think this takes an $8,000 machine and that it blows up on the first shot. I want to dispel that,” says Joe. “This does work, and I want that to be known.”
Eight of Joe’s test-fires were performed using a single barrel before swapping it out for a new one on the ninth. After all those shots, the weapon’s main components remained intact–even the spiraled rifling inside of the barrel’s bore. “The only reason we stopped firing is because the sun went down,” he says....
...Still, Joe’s cheap homemade gun isn’t without its bugs. Over the course of its test firing, Joe and Guslick say it misfired several times, and some of its screws and its firing pin had to be replaced. After each firing, the ammo cartridges expanded enough that they had to be pounded out with a hammer. “Other than that, it’s pretty much confirming that yes, Defense Distributed is correct that this functions,” says Guslick. “And it’s possible to make one on a much lower cost printer.”
$25 Gun Created With Cheap 3D Printer Fires Nine Shots (Video) [Andy Greenberg/Forbes]
Robocop director Paul Verhoeven, noted for his films' ultraviolence and politically-tinged black humor, wishes to direct Arnold Schwarzenegger as an older, grayer Conan. 65-year-old Schwarzenegger starred under Verhoeven in the original version of Total Recall; no director has officially been selected for the new project, provisionally titled Conan The Legend.
Here are the top 5 movies that should have been directed by Paul Verhoeven, but were not.
1. Dredd (2012)
2. Hunger Games (2012)
3. Machete (2010)
4. Avatar (2009)
5. Hollow Man (2000)
Scientific American has a great video that quickly explains the basics of tornado formation — facts that also help explain why some parts of the country, including Oklahoma, are more prone to tornadoes than others. You'll also learn about worst tornado in recorded history, which killed more than 700 people.
The photo above was taken near Moore, Oklahoma yesterday. My father lives in Oklahoma City (thankfully, outside the path of this monster), and this shot comes from a friend of a friend of his, who wished to remain anonymous.
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Twitter accounts run by the Daily Telegraph were hijacked by pro-Assad hacktivists from the Syrian Electronic Army briefly on Monday evening.…
I have a personal Facebook account, which I use to keep up with friends and family. Like many of you, I've also discovered that this gives me a peek inside the psyche of those friends and family — and one of the things that I saw was an interest (and sometimes belief in) conspiracy theories. It wasn't limited to the Right or the Left. And it definitely wasn't limited to people I love but consider a little "off", if you know what I'm saying.* Over and over, I saw perfectly rational, sane people, supporting and spreading ideas that, to me, seemed a little nuts.
And that made me curious: Where do conspiracy theories come from? The answer, according to psychologists and sociologists, is not "Glenn Beck's fevered imagination." In fact, the category "people who believe in conspiracy theories" can't even really be separated into The Other in a nice, neat way. If you look at the data, the people who believe in conspiracy theories are us. And those theories grow out of both historical context, our feelings about ourselves and the wider world, and the way that our brains respond to feelings of powerlessness and uncertainty. Here's a short excerpt from my most recent column for The New York Times Magazine:
While psychologists can’t know exactly what goes on inside our heads, they have, through surveys and laboratory studies, come up with a set of traits that correlate well with conspiracy belief. In 2010, Swami and a co-author summarized this research in The Psychologist, a scientific journal. They found, perhaps surprisingly, that believers are more likely to be cynical about the world in general and politics in particular. Conspiracy theories also seem to be more compelling to those with low self-worth, especially with regard to their sense of agency in the world at large. Conspiracy theories appear to be a way of reacting to uncertainty and powerlessness.
Economic recessions, terrorist attacks and natural disasters are massive, looming threats, but we have little power over when they occur or how or what happens afterward. In these moments of powerlessness and uncertainty, a part of the brain called the amygdala kicks into action. Paul Whalen, a scientist at Dartmouth College who studies the amygdala, says it doesn’t exactly do anything on its own. Instead, the amygdala jump-starts the rest of the brain into analytical overdrive — prompting repeated reassessments of information in an attempt to create a coherent and understandable narrative, to understand what just happened, what threats still exist and what should be done now. This may be a useful way to understand how, writ large, the brain’s capacity for generating new narratives after shocking events can contribute to so much paranoia in this country.
*This joke is totally going to get me into trouble. Dear friends and family: Trust me, you are not the one I'm referring to here.
Sony’s flagship Android smartphones have been a bit of a disappointment to me. But if the Xperia S and Xperia T didn’t quite cut the Colman’s, the cheaper follow-ups, the Xperias P and V, were more convincing. Sony, it seems, is better in the middle than at the top.…
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Yitang Zhang is a largely unknown mathematician who has struggled to find an academic job after he got his PhD, working at a Subway sandwich shop before getting a gig as a lecturer at the University of New Hampshire. He's just had a paper accepted for publication in Annals of Mathematics, which appears to make a breakthrough towards proving one of mathematics' oldest, most difficult, and most significant conjectures, concerning "twin" prime numbers. According to the Simons Science News article, Zhang is shy, but is a very good, clear writer and lecturer.
For hundreds of years, mathematicians have speculated that there are infinitely many twin prime pairs. In 1849, French mathematician Alphonse de Polignac extended this conjecture to the idea that there should be infinitely many prime pairs for any possible finite gap, not just 2.
Since that time, the intrinsic appeal of these conjectures has given them the status of a mathematical holy grail, even though they have no known applications. But despite many efforts at proving them, mathematicians weren’t able to rule out the possibility that the gaps between primes grow and grow, eventually exceeding any particular bound.
Now Zhang has broken through this barrier. His paper shows that there is some number N smaller than 70 million such that there are infinitely many pairs of primes that differ by N. No matter how far you go into the deserts of the truly gargantuan prime numbers — no matter how sparse the primes become — you will keep finding prime pairs that differ by less than 70 million.
The result is “astounding,” said Daniel Goldston, a number theorist at San Jose State University. “It’s one of those problems you weren’t sure people would ever be able to solve.”
Unknown Mathematician Proves Elusive Property of Prime Numbers [Erica Klarreich/Wired/Simons Science News]
Geek's Guide The Post Office Tower in London, adorned with microwave dishes and resembling a gigantic Star Trek gadget, symbolised the UK's white heat for technology in the 1960s.…
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Intrepid Mars rover Curiosity has bored into its second stone on the surface of the Red Planet, taking a sample from the interior of a rock called "Cumberland".…