On congruity of nodes and assortative information content in complex networks

Mahendra Piraveenan; Mikhail Prokopenko; Albert Y. Zomaya

doi:10.3934/nhm.2012.7.441

Article Contents

2012, Volume 7, Issue 3: 441-461. Doi: 10.3934/nhm.2012.7.441

This issue Previous Article Effects of topology on robustness in ecological bipartite networks Next Article Identifying critical traffic jam areas with node centralities interference and robustness

On congruity of nodes and assortative information content in complex networks

1.
The Centre for Complex Systems Research, Project Management Graduate Programme, School of Civil Engineering, University of Sydney, NSW 2006
2.
CSIRO Information and Communications Technologies Centre, Locked Bag 17, North Ryde, NSW 1670
3.
The Centre for Distributed and High Performance Computing, School of Information Technologies, University of Sydney, NSW 2006

Received: November 30, 2011

Revised: May 31, 2012

Published: August 2012

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Abstract

Many distributed systems lend themselves to be modelled as networks, where nodes can have a range of attributes and properties based on which they may be classified. In this paper, we attempt the task of quantifying varying levels of similarity among nodes in a complex network over a period of time. We analyze how this similarity varies as nodes implement their functional logic and node states vary accordingly. We then use information theory to analyze how much Shannon information is conveyed by such a similarity measure, and how such information varies with time. We also propose node congruity as a measure to quantify the contribution of each node to the network's scalar assortativity. Finally, focussing on networks with binary states, we present algorithms (logic functions) which can be implemented in nodes to maximize or minimize scalar assortativity in a given network, and analyze the corresponding tendencies in information content.

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Mathematics Subject Classification: Primary: 91D30, 05C82, 90B18; Secondary: 92C42.

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