Not all balls are round: an investigation of alternative recognition-region shapes
ICARIS'05 Proceedings of the 4th international conference on Artificial Immune Systems
Structure versus function: a topological perspective on immune networks
Natural Computing: an international journal
An engineering-informed modelling approach to AIS
ICARIS'11 Proceedings of the 10th international conference on Artificial immune systems
Structural properties of shape-spaces
ICARIS'06 Proceedings of the 5th international conference on Artificial Immune Systems
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The approach of H. Bersini to shape-spaces and in particular his definition of affinity are analysed. It is shown that the definition of the affinity function in Bersini style implies a special form of an affinity region, namely a rhombus. However, variants of the function can be defined with rectangular or square but rotated affinity regions. In all cases, the affinity function has the form of a pyramid over the affinity region. The definition of the affinity function can be modified in such a way that it describes a lopsided pyramid. Experimental results with a reimplementation of Bersini's simulation procedure show that the form of the affinity region has a strong influence on the form of the recognition/tolerance separation of the shape-space.