Archive image from page 201 of Design for a brain; the. Design for a brain; the origin of adaptive behavior . designforbrainor00ashb Year: 1960 DESIGN FOR A BRAIN 14/6 14/6. The process can readily be demonstrated, almost in truistic form, on the Homeostat (which is here treated as a system whose variables include 4 position of uniselector ' so that it has many states of equilibrium, differing from one another according to the uniselector's position). The process is shown in Figure 14/6/1. Two units were joined Time Figure 14/6/1 : Homeostat tracing. At each D, l's magnet is displaced by t
Archive image from page 201 of Design for a brain; the. Design for a brain; the origin of adaptive behavior . designforbrainor00ashb Year: 1960 DESIGN FOR A BRAIN 14/6 14/6. The process can readily be demonstrated, almost in truistic form, on the Homeostat (which is here treated as a system whose variables include 4 position of uniselector ' so that it has many states of equilibrium, differing from one another according to the uniselector's position). The process is shown in Figure 14/6/1. Two units were joined Time Figure 14/6/1 : Homeostat tracing. At each D, l's magnet is displaced by the operator through a fixed angle. 2 receives this action through its uniselector. When the uniselector's value makes 2's magnet meet the critical state (shown dotted) the value is changed. After the fourth change the value causes only a small movement of 2, so the value is retained permanently. 1 —> 2. The effect of 1 on 2 was determined by 2's uniselector, which changed position if 2 exceeded its critical states. The operator then repeatedly disturbed 2 by moving 1, at D. As often as the uniselector transmitted a large effect to 2, so often did 2 shift its uniselector. But as soon as the uniselector arrived at a position that gave a transmission insufficient to bring 2 to its critical states, that position was retained. So under constant stimulation by D the amplitude of 2's response changed from larger to smaller. The same process in a more complex form is shown in Figure 14/6/2. Two units are interacting: 1 ± 2. Both effects go Time U 3l Figure 14/6/2 : Homeostat arranged as ultrastable system with two units interacting. At each D the operator moved l's magnet through a fixed angle. The first field such that D does not cause a critical state to be met is retained permanently. 188
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