Sarah Carratt 4.14.11

Overview

 * dx/dt = production rate - degradation rate
 * degradation rate: amount a fraction of material beaks down in each unit time period
 * production rate:
 * model factors: liner, MM, sigmoid (smoothing out of on-off switch)
 * S'(x) = 1/ (1+e-x)
 * S(w(x-t))where w=scaling,t=threshold at on-off junction

Matrix Games

 * Recall our adjacency matrix A (transpose of YEASTRACT)
 * 1 if gene j affects gene i
 * 0 if not
 * there are scaling factors of weights and thresholds
 * affectee receives switching sights from affectors

Difference between "1" and "1"

 * if more turns on and less "turns off"...activation
 * more turns off and less "turns on"...activation
 * switch between by flipping sign on scalar