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Doom-Like Video Surveillance For Ports In Development 56

oranghutan writes "A research and development group down under is working to develop an advanced video surveillance system for ports around the world that uses video superimposed onto a 3D map. With 16-megapixel high-definition cameras on a distributed (cabled) network and a proprietary system written in a variety of languages (C++, Python, SQL, etc.), the group from NICTA is aiming to allow security teams at the Port of Brisbane — which is 110km long — to monitor shipping movements, cargo and people. By scrolling along a 3D map, the security teams can click on a location and then get a real-time video feed superimposed onto the map. Authorities from around the world with the right permissions can then access the same system. The main difference from regular surveillance systems is the ability to switch views without having to know camera numbers/locations and the one screen view."

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

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

Submission + - Best practices for a lossless music archive

Sparagmei writes: I'm a big music fan, and I like listening to the music I own on various pieces of digital gear. Right now my library's at about 20,000 tracks, ripped from CDs to MP3 at 256kbps (enough that I can't tell the difference on my low-end playback gear).

However, with the MP3 judgment rippling through the world, I'm interested in perhaps moving to a different compression standard. Before I do that, I'd like to ask a question: what lossless format would you recommend for making a digital "master library", which could be (relatively) easily downsampled to a compressed format? Important factors would be true losslessness, filesize (smaller than PCM WAV would be nice), embedded metadata (id3v2-like), existence of automated ripper software, and (to a lesser extent) open-source implementation of such software. Widespread playback implementation of the lossless codec is not an issue for me; the lossless library would likely be burnt to archival DVD media and stored after being downsampling with the chosen compressor.

The reason I ask is this: I've got a 20,000-track re-ripping job ahead of me. I'd like to do that just once, lossless, so that years from now, when I decide to jump from Vorbis to "komprezzor_2039_1337" or whatever, I don't need to drag out the old plastic discs. Thanks!
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Journal Journal: Interesting...

After looking at my record on days that I post, it seems I enjoy posting on Tuesday and Thursdays the most. Odd, since one would expect /. to be occupying my time mostly on Mondays and Fridays...

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