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Sun Microsystems

Running ZFS Natively On Linux Slower Than Btrfs 235

Posted by kdawson from the early-days dept.
An anonymous reader writes "It's been known that ZFS is coming to Linux in the form of a native kernel module done by the Lawrence Livermore National Laboratory and KQ Infotech. The ZFS module is still in closed testing on KQ infotech's side (but LLNL's ZFS code is publicly available), and now Phoronix has tried out the ZFS file-system on Linux and carried out some tests. ZFS on Linux via this native module is much faster than using ZFS-FUSE, but the Solaris file-system in most areas is not nearly as fast as EXT4, Btrfs, or XFS."
Transportation

Should Cities Install Moving Sidewalks? 698

Posted by timothy from the that-and-bicycle-elevators dept.
theodp writes "The real problem nowadays is how to move crowds,' said the manager of the failed Trottoir Roulant Rapide high-speed (9 km/h) people mover project. 'They can travel fast over long distances with the TGV (high-speed train) or airplanes, but not over short distances (under 1 km).' Slate's Tom Vanderbilt explores whether moving walkways might be viable for urban transportation. The first moving sidewalks were unveiled at Chicago's 1893 Columbian Exposition, and at one point seemed destined to supplant some subways, but never took root in cities for a variety of reasons. Vanderbilt turns to science fiction for inspiration, where 30 mph walkways put today's tortoise-like speed ranges of .5-.83 m/s to shame. In the meantime, Jerry Seinfeld will just have to learn to live with 'the people who get onto the moving walkway and just stand there. Like it's a ride.'"
Handhelds

Heavy US Demand Delays iPad's Worldwide Release 314

Posted by samzenpus from the supply-and-too-much-demand dept.
Dave Knott writes "The international launch of the iPad has been delayed until late May, a one month setback from the original launch window of late April. Citing Apple's press release: 'Although we have delivered more than 500,000 iPads during its first week, demand is far higher than we predicted and will likely continue to exceed our supply over the next several weeks as more people see and touch an iPad. We have also taken a large number of pre-orders for iPad 3G models for delivery by the end of April.' International pricing will be announced on May 10, at which time international pre-orders are expected to begin."
Portables

iPad Will Beat Netbooks With "Magic" 1010

Posted by CmdrTaco from the gonna-need-more-planes dept.
entirely_fluffy writes "In a talk intended to woo investors, Apple Chief Operating Officer Tim Cook said the iPad will win over potential netbook buyers, but not because of specs or features. No, Cook said, the iPad's magical properties will seal the deal. 'The netbook is not an experience people are going to continue wanting to have,' Cook said, according to Macworld. 'When they play with the iPad and experience the magic of using it ... I have a hard time believing they're going to go for a netbook.'" Another thing that would help would be a camera and a $100 discount, but hey Magic is cool too, provided they have enough mana.
Science

Making a Liquid Invisibility Cloak 93

Posted by ScuttleMonkey from the pour-to-order dept.
Researchers at Fudan University in Shanghai, China are proposing a method which could lead to the first soft, tunable metamaterial, the key ingredient in building an invisibility device. "The fluid proposed by Ji-Ping Huang of Fudan University in Shanghai, China, and colleagues, contains magnetite balls 10 nanometers in diameter, coated with a 5-nanometer-thick layer of silver, possibly with polymer chains attached to keep them from clumping. In the absence of a magnetic field, such nanoparticles would simply float around in the water, but if a field were introduced, the particles would self-assemble into chains whose lengths depend on the strength of the field, and which can also attract one another to form thicker columns. The chains and columns would lie along the direction of the magnetic field. If they were oriented vertically in a pool of water, light striking the surface would refract negatively – bent in way that no natural material can manage."

Comment Re:no. it does not. (Score 3, Insightful) 405

by s.bots (#29999418) Attached to: Home Phone System That Syncs To Computer?

Not really for personal use, unless you live in an area where owning a cellphone is prohibitively expensive and a landline isn't. I think the number of geeks that would fit this niche would be very small. Other than this case, I really think the landline is slowly going the way of the dodo as far as home users are concerned.

However, being able to push something like this out to business and corporate clients may well be a viable opportunity.
The Military

Iraq Swears By Dowsing Rod Bomb Detector 652

Posted by samzenpus from the one-man's-junk-is-another-man's-junk-science dept.
jggimi writes "According to the New York Times, more than fifteen hundred remote sensing devices have been sold to Iraq's Ministry of the Interior, at prices ranging from $16,500 to $60,000 each. The devices are used for bomb and weapon detection at checkpoints, and have no battery or other power source. Sounds great, but according to a retired United States Air Force officer, Lt. Col. Hal Bidlack, they work on the same principle as a Ouija board — the power of suggestion. He described the wand as nothing more than an explosives divining rod. Even though the device has been debunked by the US Military, the US Department of Justice, and even Sandia National Laboratories, the Iraqis are thrilled with the devices. 'Whether it's magic or scientific, what I care about is it detects bombs,' said Maj. Gen. Jehad al-Jabiri, head of the Ministry of the Interior's General Directorate for Combating Explosives."
Input Devices

How To Enter Equations Quickly In Class? 823

Posted by timothy from the napkins-and-a-digital-camera dept.
AdmiralXyz writes "I'm a university student, and I like to take notes on my (non-tablet) computer whenever possible, so it's easier to sort, categorize, and search through them later. Trouble is, I'm going into higher and higher math classes, and typing "f_X(x) = integral(-infinity, infinity, f(x,y) dy)" just isn't cutting it anymore: I need a way to get real-looking equations into my notes. I'm not particular about the details, the only requirement is that I need to keep up with the lecture, so it has to be fast, fast, fast. Straight LaTeX is way too slow, and Microsoft's Equation Editor isn't even worth mentioning. The platform is not a concern (I'm on a MacBook Pro and can run either Windows or Ubuntu in a virtual box if need be), but the less of a hit to battery life, the better. I've looked at several dedicated equation editing programs, but none of them, or their reviews, make any mention of speed. I've even thought about investing in a low-end Wacom tablet (does anyone know if there are ultra-cheap graphics tablets designed for non-artists?), but I figured I'd see if anyone at Slashdot has a better solution."

Comment Re:Most people simply don't think about security (Score 1) 216

by s.bots (#29266059) Attached to: The Myths of Security

"Think about how stupid the average person is. Now, realise that half of them are dumber than that." - George Carlin

I think your sig is a more valid contribution to the discussion than your comment... You can toss as many security obstacles on a computer as you can, but if your end user is a knuckle-dragger who loves his FREE PR0N! and VI@GR4, then your attempt at security is wasted.

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