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

 



Forgot your password?
typodupeerror
×
Software

Electronic Life Makes Evolving Art 54

brilanon writes "Good news! On Sept 4, critterdrug, the a-life lab for the twenty-teens, was updated to make generating a species almost trivial. A new video shows semi-random artificial animals gaining neurons and synapses as they compete to draw a gradient on an animated shared canvas which constitutes 1024 frames spread through time. The canvas is a 10-megabyte digital background for the lossy neural nets that populate the world. What you get are cellular automata run by psychic neural nets that are bound by the rules of a survival contest with physics. Features implementations of telepathy, Rupert Sheldrake's morphic fields and five types of drugs. The key assignments have changed since critterding; check the changelog on the web page for the new ones. Happy hacking!"
Linux

The State of Linux IO Scheduling For the Desktop? 472

pinkeen writes "I've used Linux as my work & play OS for 5+ years. The one thing that constantly drives me mad is its IO scheduling. When I'm copying a large amount of data in the background, everything else slows down to a crawl while the CPU utilization stays at 1-2%. The process which does the actual copying is highly prioritized in terms of I/O. This is completely unacceptable for a desktop OS. I've heard about the efforts of Con Kolivas and his Brainfuck Scheduler, but it's unsupported now and probably incompatible with latest kernels. Is there any way to fix this? How do you deal with this? I have a feeling that if this issue was to be fixed, the whole desktop would become way more snappier, even if you're not doing any heavy IO in the background." Update: 10/23 22:06 GMT by T : As reader ehntoo points out in the discussion below, contrary to the submitter's impression, "Con Kolivas is still actively working on BFS, it's not unsupported. He's even got a patch for 2.6.36, which was only released on the 20th. He's also got a patchset out that I use on all my desktops which includes a bunch of tweaks for desktop use." Thanks to ehntoo, and hat tip to Bill Huey.
Software

10 Oddly Useful Specialty Web Browsers 72

snydeq writes "InfoWorld's Peter Wayner looks beyond Firefox, Chrome, Opera, Safari, and IE to uncover 10 alternative browsers that offer specialized advantages for 3-D searching, social networking, easy scriptability, powerful page manipulation, and the like. Each provides a targeted browsing environment, enabling users to browse Web tables into spreadsheets, browse leaner, browser in text, browse socially, browse musically, or browse smarter on the Mac. 'A purist might object that these hybrids are not much different from a standard browser with extra plug-ins. There's some truth to this, but not always — some of the unique capabilities can only be done deep inside the software. In any case, the job of parsing the terms and creating an exact definition of the Web browser isn't as much fun as embracing the idea that there are dozens of alternatives.'"
Math

Physicists Say Graphene Could Create Mass 184

eldavojohn writes "Graphene has gotten a lot of press lately. The Nobel prize-winning, fastest-spinning, nanobubble-enhanced silicon replacement is theorized to have a new, more outlandish property. As reported by Technology Review's Physics Blog, graphene should be able to create mass inside properly formed nanotubes. According to Abdulaziz Alhaidari's calculations, if one were to roll up graphene into a nanotube, this could compactifiy dimensions (from the sheet's two down to the tube's one), and thus 'the massless equations that describe the behavior of electrons and holes will change to include a term for mass. In effect, compactifying dimensions creates mass.' What once would require a massive high-energy particle accelerator can now be tested with carbon, electricity, and wires, according to the recent paper."
Transportation

Heroic Engineer Crashes Own Vehicle To Save a Life 486

scottbomb sends in this feel-good story of an engineer-hero, calling it "one of the coolest stories I've read in a long time." "A manager of Boeing's F22 fighter-jet program, Innes dodged the truck, then looked back to see that the driver was slumped over the wheel. He knew a busy intersection was just ahead, and he had to act fast. Without consulting the passengers in his minivan — 'there was no time to take a vote' — Innes kicked into engineer mode. 'Basic physics: If I could get in front of him and let him hit me, the delta difference in speed would just be a few miles an hour, and we could slow down together,' Innes explained."
Communications

In Florida, a Cell Phone Network With No Need For a Spectrum License 107

holy_calamity writes "Technology Review reports on a cell phone network in Fort Lauderdale, Florida, like no other. Instead of paying to reserve a section of wireless spectrum its owner, xG Technology, uses cognitive radios that steer signals through the unlicensed 900MHz band more normally used by cordless phones and baby monitors. The radios in both handset and base station scan for gaps left by other devices in that band and make dynamic connections that constantly hop frequencies to ensure a good link. The network is designed to show off the tech, which the company says could be used in conventional cellphones to access extra spectrum or white spaces devices."
Hardware Hacking

Building a Telegraph Using Only Stone Age Materials 238

MMBK writes "It's the ultimate salvagepunk experiment, building a telegraph out of things found in the woods. From the article: 'During the summer of 2009, artist Jamie O’Shea of the organization Substitute Materials set out to test whether or not electronic communication could have been built at any time in history with the proper knowledge, and with only tools and materials found in the wilderness of New Jersey.'"
The Internet

Interop Returns 16 Million IPv4 Addresses 270

klapaucjusz writes "Every discussion about IPv4 address exhaustion prompts comments about whether Apple (or MIT, or UCB, or whoever) needs all of those addresses. Interop has set the example by returning 16 million IPv4 addresses to the ARIN pool, extending the IPv4 address exhaustion deadline by a whole month."
Image

Australian Visitors Must Declare Illegal Porn To Customs Officers 361

Australian Justice Minister Brendan O'Connor has advised visitors to take a better safe than sorry policy when it comes to their porn stashes, and declare all porn that they think might be illegal with customs officers. From the article: "The government said it changed the wording on passenger arrival cards after becoming aware of confusion among travellers about what pornography to declare. 'People have a right to privacy and while some pornography is legal and does not need to be disclosed, all travellers should be aware that certain types of pornography are illegal and must be declared to customs,' Mr O'Connor said."
Medicine

Woman Develops Peanut Allergy After Lung Transplant 146

An anonymous reader writes "A woman in need of a lung transplant got her new lungs from someone with a peanut allergy who died of anaphylactic shock. Seven months after the surgery, the woman was at an organ transplant support group when she ate a peanut butter cookie and had a violent allergic reaction. So how had the woman's new lungs brought along a peanut allergy? A blog post dives into the medical details and explains that immune cells in the donated lungs couldn't have lived in the new body for long enough to cause the reaction... however, if they encountered an allergen (i.e. something peanuty) shortly after being transplanted, they could have trained the woman's native immune cells to respond."
Government

NASA Reveals Hundred Year Starship Program 351

cmansley writes "NASA Ames Director Simon Worden revealed that NASA Ames has 'just started a project with DARPA called the Hundred Year Starship,' with $1 million funding from DARPA and $100K from NASA. Worden said 'Larry [Page] asked me a couple weeks ago how much it would cost to send people one way to Mars and I told him $10 billion, and his response was, "Can you get it down to 1 or 2 billion?"'"
Idle

2012 Mayan Calendar 'Doomsday' Date Might Be Wrong 144

astroengine writes "A UC Santa Barbara associate professor is disputing the accuracy of the mesoamerican 'Long Count' calendar after highlighting several astronomical flaws in a correlation factor used to synchronize the ancient Mayan calendar with our modern Gregorian calendar. If proven to be correct, Gerardo Aldana may have nudged the infamous December 21, 2012 'End of the World' date out by at least 60 days. Unfortunately, even if the apocalypse is rescheduled, doomsday theorists will unlikely take note."

Slashdot Top Deals

So you think that money is the root of all evil. Have you ever asked what is the root of money? -- Ayn Rand

Working...