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September 30, 2002
Information Additive Codecs and P2P Networks
I was just reading a great paper on using Information Additive Codecs (IAC) on P2P Networks on Doug Kaye's web site. Interesting stuff. As I understand it, the ability to receive content abstractions out of order allows multiple downloads to be recombined to create the original, even in the presence of lost packets. This means, that you can get data streams from multiple peers simultaneously and reconstruct them into the original content without the peers having to coordinate their actions. I was wondering if anyone has done any work in this area that uses IACs in the presence of byzantine faults. My gut tells me there's something there and the work would be important since one would want to thwart the efforts of "bad guys" to corrupt a data stream by sending bad IAC data (think RIAA, for example).
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XML and the Recreation One-Stop
Interior Secretary Gale Norton was in Salt Lake City on Saturday to celebrate National Public Lands day. She was joined by my boss, Governor Leavitt. I am surprised that there seems to be no local press for the event. Usually when a cabinet secretary comes to town to talk about public lands, there's a lot of interest. There was an Interior press release (naturally) and a story earlier in the week saying the event would take place. The thing I want to highlight from the 90 minute event is the use of XML on the recreation.gov one-stop.
If you go to the site and search, you'll notice that you can find information about state parks in Utah (and other places, of course). How did the data get there? We (specifically the Dept. of Natural Resources) send them XML. Utah is a recreation.gov partner. This works the other way as well: you can get the recreation.gov data in XML. An online manual describes the data format (unfortunately, its in Word format). There is also (supposed to be) an XSD Schema file but no WSIL or other documentation as far as I can see. All of these is being coordinated by the Government Without Boundaries project.