The model proposed makes several assumptions. My question is about: Many real-world networks are heterogeneous and as such are expected to undergo large-scale cascades if some vital nodes are attacked. on page 3. I do not get the basis for this assumption. So any help for a 60's educated math major would be appreciated. On Thu, 6 Feb 2003 sgorman1@gmu.edu wrote:

The paper is avaibable on the Los Alamos site free of charge:

http://xxx.lanl.gov/PS_cache/cond-mat/pdf/0301/0301086.pdf

----- Original Message ----- From: Sean Donelan <sean@donelan.com> Date: Thursday, February 6, 2003 12:43 pm Subject: Cascading Failures Could Crash the Global Internet

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Sigh, there are differences between tightly coupled networks, such as the electric power grid and loosely couple networks like the

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But there are also some similarities, such as electric grids use DC interconnections to limit how far AC disturbances propagate; the Internet uses AS interconnections to limit IGP disturbances from propagating.

http://sci.newsfactor.com/perl/story/20686.html

The actual article requires payment to read http://ojps.aip.org/getabs/servlet/GetabsServlet?

Internet. prog=normal&id=PLEEE8000066000006065102000001&idtype=cvips&gifs=Yes

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_____ Douglas Denault doug@safeport.com Voice: 301-469-8766 Fax: 301-469-0601