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Phys Rev Lett. 2004 Jan 16;92(2):028701. Epub 2004 Jan 13.

Fluctuations in network dynamics.

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1
Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.

Abstract

Most complex networks serve as conduits for various dynamical processes, ranging from mass transfer by chemical reactions in the cell to packet transfer on the Internet. We collected data on the time dependent activity of five natural and technological networks, finding that for each the coupling of the flux fluctuations with the total flux on individual nodes obeys a unique scaling law. We show that the observed scaling can explain the competition between the system's internal collective dynamics and changes in the external environment, allowing us to predict the relevant scaling exponents.

PMID:
14753972
DOI:
10.1103/PhysRevLett.92.028701
[Indexed for MEDLINE]
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