Tag Archives: networks

Math Models Seek to Prevent Network Failures | Simons Foundation

8 May

There’s a mathematical form to systems too big to succeed:

Three years ago, Stanley and his colleagues discovered the mathematics behind what he calls “the extreme fragility of interdependency.” In a system of interconnected networks like the economy, city infrastructure or the human body, their model indicates that a small outage in one network can cascade through the entire system, touching off a sudden, catastrophic failure.

First reported in 2010 in the journal Nature, the finding spawned more than 200 related studies, including analyses of the nationwide blackout in Italy in 2003, the global food-price crisis of 2007 and 2008, and the “flash crash” of the United States stock market on May 6, 2010.

“In isolated networks, a little damage will only lead to a little more,” said Shlomo Havlin, a physicist at Bar-Ilan University in Israel who co-authored the 2010 paper. “Now we know that because of dependency between networks, you can have an abrupt collapse.”

via Math Models Seek to Prevent Network Failures | Simons Foundation.

Christopher Mitchell: We Need Spectrum for Our Communities | Mag-Net

14 Feb

Now, as the federal government decides how to allocate new spectrum that is becoming available, it has to make a decision. Should additional spectrum go to the big wireless carriers, should it expand the potential of unlicensed networks, or should there be a mix?

We think the highest priority should be setting aside spectrum that can be used to create low-cost tools that allow our communities to build their own networks. We do not need a more powerful AT&T or Verizon. Our ability to build networks has been limited by policies that restrict local authority to invest in networks and the monopoly power of incumbent operators. We have been hamstrung by federal policymakers that believe Internet access is best expanded by giving all the resources to a few massive companies controlled by Wall Street.

via Christopher Mitchell: We Need Spectrum for Our Communities | Mag-Net.