Berlin 2005 – wissenschaftliches Programm

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AKSOE: Physik sozio-ökonomischer Systeme

AKSOE 10: Social, Information and Production Networks I

AKSOE 10.1: Hauptvortrag

Dienstag, 8. März 2005, 10:00–10:45, TU P-N203

Information Horizons and Self Organization in Social Networks — •Kim Sneppen — NORDITA, Blegdamsvej 17, Dk 2100, Copenhagen, Denmark

Life without information is not life. From the genetic blueprint in our DNA to the world-wide Internet, information and its dynamic counterpart communication define our civilization. However, we live under the limited information horizon, in the sense that information is often imperfect and communication is always finite. In a society the information horizon is set by each individual’s social contacts, which in turn is a part of the global network of human communication. One simple goal for individuals is to be central. Thus we model a society where players try to be as close as possible to everybody else by moving their social connections. Thus we suggest a model that quantify the interplay between local communication and the emergent global organization of social networks.

The concept of a limited information horizon in a complex network can be quantifyed by counting the number of bits needed to navigate between nodes in the network. We discuss the thereby introduced search information, and show how different real world networks organize with respect to this measure. We discuss how to navigate in these networks, and quantify how limited information access influence our ability to search a network.