bmahersciwriter (2955569) writes In one of the biggest-ever seismology deployments at an active volcano, researchers are peppering Mount St Helens in Washington state with equipment to study the intricate system of chambers and pipes that fed the most devastating eruption in U.S. history. This month, they plan to set off 24 explosions — each equivalent to a magnitude-2 earthquake — around around the slumbering beast in an effort to map the its interior with unprecedented depth and clarity.
tyggna writes: "The flame wars of different shells and text editors have long been established, but my question is this: are text editors and various languages linked? Do the majority of Ruby programmers use Emacs? Are most Perl programmers using vim?
Please post your editor and language of choice in the comments."
Please post your editor and language of choice in the comments."
A limitation of current (affordable) 3D printers is their use of open loop controllers and stepper motors which limits reliability (drove the motor too quickly and skipped a step? Your model is ruined) and precision (~300 steps per revolution). A new project, Servo Stock instead uses cheap RC Servomotors combined with Hall Effect sensors, using a closed-loop controller to precisely position the extruder. The Servo Stock is derived from the delta robot Reprap Rostock (which is pretty cool even with stepper motors). The sensors give a resolution of 4096 ticks per rotation, and the controller can currently position the motors to within +/-2 ticks. They've also simplified the printer electronics by driving as much as possible from the controlling computer using Bowler, a new communication protocol for machine control. The Servo Stock also includes sensors for the hot end, presumably to be used to control the filament feed rate and temperature. The hardware models are fully parametric, allowing reasonably straightforward scaling of the design. Source for the hardware, firmware, and software is available.
An anonymous reader writes "A senior aide to David Cameron resigned from Downing Street last month the day before being arrested on allegations relating to child abuse images. Patrick Rock, who was involved in drawing up the government's policy for the large internet firms on online pornography filters, resigned after No 10 was alerted to the allegations. Rock was arrested at his west London flat the next morning. Officers from the National Crime Agency subsequently examined computers and offices used in Downing Street by Rock, the deputy director of No 10's policy unit, according to the Daily Mail, which disclosed news of his arrest."
jfruh writes "The new Chinese leadership released a document outlining its vision for the country Friday, and most of the attention was paid to reforms, like plans to loosen state control of the economy and end the one-child policy. But when it comes to the Internet, the Chinese Communist government is doubling down on its restrictive policies. The document notes that social networking and instant messaging tools can rapidly disseminate information and mobilize society; the government doesn't think those are good things, and plans to bolster its regulatory systems and increase the scope of their legal authority."
I find that the best place to contribute is on simple.wikipedia.org. The community of editors is much more welcoming and there's a lot of work to be done there that really only requires a basic understanding of the subject and written communication skills. I've yet to see an edit war on Simple, but then again I haven't gone looking for one either...
If protecting victims of childhood sexual abuse is a priority for you, you might want to give this petition a look...
Replying to remove accidental moderation...
Actually, it's 6^6^6 = 2.659 Ã-- 10^36305 There was a well known book written on the subject.
Candy corn isn't dead last?! Could someone explain the popularity of what is basically sugar, corn syrup, and wax?
Lucas123 writes "The very thought of losing that pear-shaped giver of warm, yellow light drove Europeans to hoard Edison's invention [Note: Or possibly Joseph Swan's invention; HT to eldavojohn.] as the EU's Sept. 1 ban on incandescent light bulbs approached. China's ban on incandescent lamps starts Oct. 1. And, in the U.S., the Energy Independence and Security Act (EISA) of 2007 effectively began banning the 100W bulb this year and will ban the most popular bulbs — the 75W, 60W and 40W screw-in incandescent bulbs --over the next two years. The end standard requires bulbs to use 65% less energy by 2020. But Republicans in Congress continue to fight the ban by hamstringing the energy efficiency standards through appropriations legislation, cutting off funds for the enforcement of the light bulb ban."
DevotedSkeptic sends this excerpt about research that found a correlation between the use of a common food-packaging chemical and obesity rates. "Since the 1960s, manufacturers have widely used the chemical bisphenol-A (BPA) in plastics and food packaging. Only recently, though, have scientists begun thoroughly looking into how the compound might affect human health—and what they've found has been a cause for concern. Starting in 2006, a series of studies, mostly in mice, indicated that the chemical might act as an endocrine disruptor (by mimicking the hormone estrogen), cause problems during development and potentially affect the reproductive system, reducing fertility. After a 2010 Food and Drug Administration report warned that the compound could pose an especially hazardous risk for fetuses, infants and young children, BPA-free water bottles and food containers started flying off the shelves. In July, the FDA banned the use of BPA in baby bottles and sippy cups, but the chemical is still present in aluminum cans, containers of baby formula and other packaging materials. Now comes another piece of data on a potential risk from BPA but in an area of health in which it has largely been overlooked: obesity. A study by researchers from New York University, published today in the Journal of the American Medical Association, looked at a sample of nearly 3,000 children and teens across the country and found a 'significant' link between the amount of BPA in their urine and the prevalence of obesity."
The National Science Olympiad gets a good chunk of my charitable donations. They do a lot to promote science education and I had a great time competing when I was in high school.
Posting to undo accidental moderation. It was slightly trollish, but I'd meant to mod Funny.