Of course, this raises difficult questions – concerning delimitations for instance. Where does one network begin and where does another one end? Where does a chain of causations begin and up to where last its effects? What do the nodes of a network consist of? And what its links?
In addition, complex networks have their own peculiar ways. Their interactions tend to aggregate to what has been called “more than the sum of their parts”. Like systems in the classical sense, they create and follow an eigen-behavior and thereby tend to become realities sui generis. It seems legitimate therefore to speak of networking networks, as has been suggested. The activity of a single protein might look different in the context of its interactome, in the same way as a simple text message might take on particular meaning when seen in its context of Tweeds or a consumer decision might have different impact in the context of market transactions.
What is more, in its specificity the network approach asks for special means. The relevancies of internet pages for instance, the interactions in social networks or the neuronal activity patterns in our brain ask for particular methods to be assessed. With one powerful instance of these methods being computer-based modeling, it seems natural that the Viennese Network for the Simulation of Complex Systems has dedicated a part of its activities to the topic of networks, their origins, their methods and their applications. This reader contains some of the presentations that were given by members of this network on the occasion of its regular meetings in the venue of the Viennese Institute for Science and Art (Institut für Wissenschaft und Kunst, IWK). The presentations have been put together in order to document the proceedings of this research network and to provide an accessible, though compact overview on the scope that the network approach meanwhile developed.