Ross indexed the following pages under the keyword: "Activity".

Summary: Dictionary definitions: Representative, Stability, State, System, Variable. Activity variety of Group (mathematical) scientific knowledge as Epistemology [3]: An early review of what is meant by 'knowing' { 2790 - 2801 } 2789 2790

Activity positive effect of Memory filling of Oddments [32]: Prolonged activity of a parameter makes the system's behaviour tend to depend more on the parameter's particular line of behaviour than on the system's particular initial state, 3956. Essential variables dominating a system The Multistable System [32]: Properties of each part depend more and more, as time goes on, what happens to it rather that on which initial state it started from. 3957. 3956 3957

Summary: In all cases so far, all arcs are assumed to have some sign that they are, or have recently been, active, and the discriminative feedback hits only those with the sign. 5557, 5584, 5601, 5609, 5628 Activity as information for feedback Discrimination methods known Summary: Unsolved problem. (Strachey's solution, 5559) Memory is there a minimal quantity? 5550 5551

Summary: More on the spread of "structure". Summary: Others are building machines with discriminative feedback. 5584 SNARK built by Minsky Activity as information for feedback Feedback discrimination used by SNARC Feedback discriminination used by Farley 5556 5557

Activity spread over net, or decay 5678 5679