Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
Transportation

Hyperdrive Propulsion Could Be Tested At the LHC 322

KentuckyFC writes "In 1924, the influential German mathematician David Hilbert calculated that a stationary mass should repel a particle moving towards or away from it at more than half the speed of light (as seen by a distant inertial observer). Now an American physicist has pointed out that the equal and opposite effect should also hold true: that a relativistic particle should repel a stationary mass. This, he says, could form the basis of a 'hypervelocity propulsion drive' for accelerating spacecraft to a good fraction of the speed of light. The idea is that the repulsion allows the relativistic particle to deliver a specific impulse that is greater than its specific momentum, an effect that is analogous to the elastic collision of a heavy mass with a much lighter, stationary mass, from which the lighter mass rebounds with about twice the speed of the heavy mass. Unlike other exotic hyperdrive proposals, this one can be tested using the world's largest particle accelerator, the LHC, which will generate beams of particles with the required energy (abstract). Placing a test mass next to the beam line and measuring the forces on it as the particles pass by should confirm the theory — or scupper it entirely."

Maingear Touts New Rig As "Planet's Greenest Gaming PC" 136

Maingear has just unveiled what they are calling the "planet's greenest gaming PC." Built using a small form factor and coming with Intel's new Ion graphics as the default option, this little powerhouse is built with a definite eye toward energy consumption. "Said configuration is available with Intel Core 2 Duo CPUs and an 80+ certified 300-watt power supply; those who care more about frame rates than Ma Earth can opt for a GeForce 9800 GT ECO, which — despite being a discrete, power-hungry GPU — still swallows some 40 percent less power than a standard 9800 GT. You'll also find WiFi support, room for an optional Blu-ray drive and TV tuner, upwards of 8GB of RAM and room for a single 2.5-inch HDD or SSD. The whole box checks in at just 7.6- x 8.3- x 11.4-inches, and it's available for order right now starting at $799."
Microsoft

Microsoft Asks For a Refund From Laid-Off Workers [updated] 424

An anonymous reader writes "The large print giveth, the small print taketh away. Microsoft, which recently laid off 1400 employees, is now claiming that some of those lucky schmoes were inadvertently overpaid on their severance package. A letter from the company, which was subsequently circulated on the internet, states: 'We ask that you repay the overpayment and sincerely apologize for any inconvenience to you.' Microsoft has confirmed the authenticity of the letter, but it's not known what the amounts in question are, or how many of the 1400 were affected." Update: 02/24 14:00 GMT by T : VinylRecords writes "Well, now Microsoft has recanted, saying that the situation has resulted in unfortunate amounts of bad press and public relations. 'This was a mistake on our part,' said a Microsoft spokesman in an e-mailed statement. 'We should have handled this situation in a more thoughtful manner.'"
Google

Google Router Rumors 267

An anonymous reader writes "There's a new rumor that Google is developing its own router. The company won't comment on the story, but it's been in the hardware business for a while and expanded its presence with Android. If Larry Ellison can go halvsies with HP on a server, then Eric Schmidt should certainly be able to make Cisco nervous."
The Courts

Court Rules That Palin Must Save Yahoo Emails 412

quarterbuck writes "An Anchorage judge has ruled that Governor Sarah Palin must save her emails, as they were apparently used for state business. Last week a Tennessee man was arrested over hacking one of her Yahoo email accounts. The Washington Post also reports that Sarah Palin, her husband, and officials had set up email accounts known only to each other."
Idle

Best Field Trip Ever 2

A lucky group of 20 teenagers will be taking a 3 day tour of Amsterdam with stops in the red light district and a cannabis college. I'm sure this happens all the time. What makes this trip different is that it has been organized by the Essex County Council's youth service to help children discover how the Dutch tackle drugs, alcohol and sexual health issues. That's right, it's a field trip. I know the candy factory I toured in 5th grade would have been much better if we went to the cannabis college first.
Music

Apple Is Now the #1 US Music Retailer 251

Quantrell writes "A leaked e-mail shows that Apple hit the #1 spot for music sales in January. The article speculates that consumers cashing in their holiday gift cards may have played a role; but of course Wal-Mart and the other retailers sold gift cards too. The news is a mixed bag for the record labels. 'For the music industry, there is a dark side to Apple's ascension to the top of the charts. Buying patterns for digital downloads are different, as customers are far more likely to cherry pick a favorite track or two from an album than purchase the whole thing. In contrast, brick-and-mortar sales are predominantly high-margin CDs.'" We recently discussed Wal-Mart's role in the music business, back when they were selling nearly 20% of US music. For January Apple was at 19% and Wal-Mart at 15%.
Science

Daily Caffeine Protects Your Brain 325

Chroniton writes "The BBC has a story that many Slashdot geeks will be happy to hear: the caffeine from a cup of coffee a day can help prevent Dementia, by blocking the damage of cholesterol. (At least in rabbits) This is in addition to the already-known protection against Alzheimer's Disease. More research is needed to test the effect on humans."
Patents

Submission + - Klausner Sues Apple over Voicemail Patent (reuters.com)

SnowDog74 writes: "Filed in Texas by New York-based Klausner Technologies, "The suit alleges asserts that the defendants' Internet-based voicemail products and services violate a Klausner patent. It seeks damages and future royalties estimated at $300 million, according to the press release." Interestingly, the article points out that Klausner has pursued Apple over several patent disputes relating to the Apple MessagePad (Newton). Klausner's lawsuit "also names Comcast Corp, Cablevision Systems Corp and eBay Inc's Skype as infringing its patent for "visual voicemail.""
Enlightenment

Submission + - Top 10 Tech Letdowns of 2007 (cio.com)

knash writes: "CIO.com put together a list and slideshow of tech letdowns this year, including green IT, Microsoft Vista and, yes, the iPhone. Find out why CIO picked what it picked, and you can add your own biggest moment of feeling utterly deflated in 2007...Here's an excerpt: We had much to hail this year, including rising IT salaries and better virtualization tools, but we also sighed over IT products and ideas that fell short. H-1B visa reform? Not likely. "Spam king" arrested? Yeah, that was a big help. We can't wait to buy a Palm Foleo! (Um, never mind.) Has your business deployed Microsoft Vista? And while environmentalists cheer Al Gore's Nobel, the green IT movement looks like a crawl. Read on about what's got us feeling cheated this year. And since misery loves company, please add your own bubble bursts. Or debate ours."

Slashdot Top Deals

Counting in binary is just like counting in decimal -- if you are all thumbs. -- Glaser and Way

Working...