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Re: Cascading Failures Could Crash the Global Internet
From: Douglas Denault <doug () safeport com>
Date: Sat, 8 Feb 2003 10:31:51 -0500 (EST)


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



Sigh, there are differences between tightly coupled networks, such as
the electric power grid and loosely couple networks like the 
Internet.
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?
prog=normal&id=PLEEE8000066000006065102000001&idtype=cvips&gifs=Yes





_____
Douglas Denault
doug () safeport com
Voice: 301-469-8766
  Fax: 301-469-0601


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