ISCI 1001 Lecture Notes - Lecture 6: Complex Adaptive System, Negative Feedback, Positive Feedback

• School: Carleton University
• Department: Interdisciplinary Science
• Course: ISCI 1001
• Professor: John Buschek

Document Summary

Network of relationships among parts (components) that interact & influence 1 another: exchange energy, exchange matter, exchange info. Sun e -> (*circle*) -> food (hunter gatherer) -> thermal e. Sun e -> (*circle*) -> food (human work *arrow back to circle*) -> agriculture (positive. Feed part of output back into system -> increases output (positive feedback) Part of output back into system -> reduces output. Sensor t (too low) -> switch on -> heat on (t starts to increase) -> fan on -> sensor (t just right) -> switch off -> heat off (t starts to decrease) -> fan off (negative feedback) Some cases things are changing, but they change so things balance out. Tendency of a system to maintain can start, or stable, internal conditions: homeostasis. Homeostatic systems are said to be in a stable steady state. Resistance: strength of the system"s tendency to remain constant -> to resist disturbance.