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We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).


Comment: Caringo is close... (Score 1) 669

by Dri (#26103455) Attached to: Long-Term Personal Data Storage?

Recently I've been working with a storage cluster technology from Caringo called CAStor. This is ofcourse for larger deployments and similar to Amazon S3. Main difference is that you can buy your own hardware and run in your own basement. Their long-term strategy is to run their proprietary software on top of commodity hardware. As long as they are around you can always upgrade your iron to the latest commodity and upgrade the storage cluster every 3-5 years. Your data is available via HTTP/1.1. The standard "www" protocol of the Intertubes will ofcourse change over time, but CAStor will adapt or you can pull your data out and move it to whatever "eternal" platform you might find in 10-15 years.

Comment: Re:Iron Man's Suit Defies Physics -- Mostly (Score 2, Interesting) 279

by John Carmack (#23266718) Attached to: The Science of Iron Man
Hydrogen peroxide powered rocket packs fly for around 30 seconds, because they have a specific impulse of around 125, meaning that one pound of propellant can make 125 pound-seconds of thrust, meaning that it takes about two pounds of propellant for every second you are in the air. Mass ratios are low for anything strapped to a human, so the exponential nature of the rocket equation can be safely ignored.

A pretty hot (both literally and figuratively) bipropellant rocket could manage about twice the specific impulse, and you could carry somewhat heavier tanks, but two minutes of flight on a rocket pack is probably about the upper limit with conventional propellants.

However, an actual jet pack that used atmospheric oxygen could have an Isp ten times higher, allowing theoretical flights of fifteen minutes or so. Here, it really is a matter of technical development, since jet engines have thrust to weight ratios too low to make it practical. There is movement on this technical front, but it will still take a while.

John Carmack

Comment: Re:Winamp (Score 1) 362

by supremo (#4399445) Attached to: Component MP3/OGG Players?
Why? I have linux running on a spacewalker in my livingroom. It rocks! I use mplayer and xmms. What else do I need? I share/get files via NFS and Samba.
I can tell you that when it comes to watching video files mplayer kicks windows mediaplayers ass! Takes all the formats and has a much better interface when you sit in your sofa. I have a nice little black IR keyboard acting as my remote. It just rocks!

Civilization, as we know it, will end sometime this evening. See SYSNOTE tomorrow for more information.