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Fig. 8.
Examination of field and stimulation received at potential network sites for 2D
shape-space with similarity based anity
14000
1000
12000
990
10000
980
8000
970
6000
960
4000
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2000
940
0
1600 1800 2000
930
0
200
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1400
iterations
Fig. 9.
Stimulation and Concentration of an antigen added to a network evolved using
a similarity based anity function
intertwining of tolerant and intolerant regions which averages out the total field
received at any site. Almost every site appears to be potentially reactive. One
therefore might expect the network to be intolerant of any antigens at all — sim-
ulation and experimentation proves the opposite. In fact, the network is tolerant
of
all
antigens presented. Although at first glance surprising, the result is clearly
explained: figure 9 plots the stimulation and concentration received by a single
antigen randomly added to the network for 2000 iterations. Initially, the stimu-
lation received by the antigen is high and it's concentration therefore decreases.
This in turn results in a decrease in the stimulation of the antigen as the anti-
gen now stimulates corresponding antibody cells less - therefore its stimulation
(and concentration) continue to decrease. However, when the stimulation of the
