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Various network structures exist in the world. Recently, small-world and scale-free have been focused attention on peculiar network structures. Those networks seem to indicate some characteristics of complex systems. However, the relations between not only the two types of network but also between other related ones are ambiguous. The purpose of this study(More)
In this paper, we propose a reaction-formation model called "Atomoid", the reaction dynamics of which are analogous to those found in the physical world based on energy levels. Our ultimate aim is to realize an evolv-able emergent system above a non-symbolic reaction-formation system. To realize such a system, we construct a model of Atomoid and focus on(More)
This paper proposes the methodology for hardware evolution by genetic programming (GP). By adopting Binary Decision Diagrams (BDDs) as hardware representation, larger circuits can be evolved, and they will be easily verified by utilizing commercial CAD software. The hardware descriptions specified in BDDs are improved by GP operators, to synthesize various(More)