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| Current Topic: Technology |
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| Topic: Technology |
1:57 pm EST, Nov 11, 2002 |
A few weeks ago someone called me from a rock concert in Texas, held the phone up, and told me to listen to one of the songs. The person in this email claimed they were busted by security at a rolling stones concert for doing the same thing. Ubiquitous cell phones means ubiquitous audio recording (and surveillance), ubiquitous cameras, and soon video. What are the implications of this? For privacy? IP? Media? Cellphones and copyright |
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CS 6604: Recommender Systems (Spring 2001) |
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| Topic: Technology |
12:05 pm EDT, Jun 28, 2002 |
In Spring 2001, Virginia Tech professor Naren Ramakrishnan taught an entire course on the topic of recommender systems. Here you can browse the syllabus, review slides from the lectures, and review the reading list. Course overview: CS 6604 concentrates on algorithms, methodologies, systems, and larger-scope issues (economic, commercial etc.) pertaining to reducing information overload. The unique aspect of this course will be how it integrates ideas from diverse areas: numerical analysis (strange but true), information systems, human-computer interaction, and algorithmics. Over the past three years, a large body of literature on recommender systems, filtering, and personalization technologies has been developed. Even though the field is driven by commercial trends and industrial developments, many of the ideas are nearing a stage of stabilization when their use is becoming common place (textbook material). CS 6604 will help illustrate the interplay between these different areas and demonstrate how ideas from diverse backgrounds can be combined in novel and sophisticated ways. CS 6604: Recommender Systems (Spring 2001) |
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Stick a fork in it; 10 GigE is done -- but still too hot to eat |
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| Topic: Technology |
5:18 pm EDT, Jun 14, 2002 |
The first fiber-only Ethernet standard was approved Wednesday, opening the door for a new generation of Ethernet products. The IEEE 802.3 standards group gave the go-ahead to 802.3ae, a version of Ethernet that runs at 10 gigabits per second. Extreme Networks: "We will have a 10gbps module within the next few months." It will cost around $60,000. Stick a fork in it; 10 GigE is done -- but still too hot to eat |
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When 300 baud was the bomb |
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| Topic: Technology |
4:36 pm EDT, Jun 3, 2002 |
Back in the day, there were boards. Bulletin Board Systems. BBS's. No Net, no Web, no cyberspace, nothing. Just boards, and their ugly stepchildren, D-Dials. All strung together with phone lines, hand-rolled software, and 8-bit computers. No backbone, no hubs, no routers, no DNS tables. Just one computer picking up the phone, calling another, and having a little chat. Back in the day, phone prefixes mattered. Flat rate local calls meant the boards in your local zone were free --- not phree, which was different. I had a list of them posted on my wall, for a while, but soon enough I never really needed it. I knew my zone. 992, 667; 665; 464 --- they were my 'hood. Sometimes when I was feeling adventurous I might go beyond, out to the outer reaches of (201) --- none of that (908) crap back then --- but rarely farther. Go beyond (201), man, and you might, like, fall off the planet. None of that 908 crap?!? What is this guy talking about?!? 908 is where all the board were! It had the biggest local calling area in the United States! There were some good boards in 201, but 908 was where it was at.. All the boards I called were in 908, even thou I was in 609. Everything was local. This guy missed the real party. His "hood" was lame. 908 was the center of the BBS world, thats were all the non-pd boards were.. I know, I called everywhere in the state. 31337 908 4 3v3r! When 300 baud was the bomb |
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HTTP Extensions for a Content-Addressable Web |
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| Topic: Technology |
3:50 pm EDT, May 21, 2002 |
"A particularly useful class of URI schemes are "Self-Verifiable URIs". These are URIs with which the URI itself can be used to verify that the content has been received intact. We also want URIs that are content-specific and can be independently generated by any host with the content. Finally, to show the intent that these addresses are location-independent, a URN scheme will be used.
Cryptographic hashes of the content provide the capabilities that we are looking for. For example we can take the SHA-1 hash of a piece of content and then encode it using Base32 to provide the following URN. urn:sha1:RMUVHIRSGUU3VU7FJWRAKW3YWG2S2RFB" Decius: This is awesome. I explained this concept to Jeremy about 6 months ago. Its whats needed to allow MemeStreams to be used to access and recommend p2p content. Glad I don't have to do it myself. :) Only issue is that they are looking for browser implementation. They can't rely on browsers. They need to build a driver that sits on top of your ethernet driver, looks for these urns, and modifies the access method appropriately... HTTP Extensions for a Content-Addressable Web |
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