Three CA evolve side by side. Two old and one young. The curves depict their maximal ages. Between them is the oscillating mean age of CA-3 whose period is 46 .. The CA do not interact. Their aging velocities are equal, and their age trajectories are parallel. At this stage the system is isolated and its components do not interact. It may be regarded as a Galilean age space. Yet once CA start interacting Galilean transformations do not hold anymore.
CA-3[mean age] sets max age of CA-1. Whenever an age of a cell hits max age, the cell dies and becomes a product. This property is hardwired in the system from its very beginning, it is part of its genetic make up. As long as CA age at the same velocity, this property remains dormant, and will not be realized. The system is undifferentiated.
When our experiment begins, CA-2 matures, and starts transferring its age (resources) to CA-1, whose aging velocity rises, and its age approaches CA-3[mean age]. When reaching it, CA-1 starts differentiating and produces cells. CA-2 age declines until it dies. CA-1 continues to live for a while and then dies.
Whenever the age of a CA-1 cell touches CA-3[mean age], the cell dies, becomes a product, and is excreted into the medium, for the utilization of remote CA.Maturation
The experiment highlights another aspect of the blossom model depicted in the previous chapter. It started with three non interacting CA with the same aging velocity. Interaction was triggered by an external event that injured CA-2, while here the trigger is internal . Only after accumulating enough resources (age), CA-2 is mature enough to trigger the blossom. This simple safety mechanism assures that cells are produced only by a mature system.
nca=3; zygote -> effect[no, 1000]; go; go109]; restoreparams; effect[1, nowdat [[3, 7]], 0]; donate[1, 2]; go ;