New Language of Systems
Networked System Dynamics
The need for a new kind of element, the adjacency flow. It is actually a parameterized collection of flows to or from any adjacent nodes-- there may be none or several, but they can be represented once in a system diagram.
Note that naturally each "network flow" can be along a different network. Human populations can travel on roads while wildlife populations can travel by terrain.
Simultaneous Systems
Systems which completely and independently identify the behavior of a variable. These systems may not interact-- applying averaged values between two systems which would otherwise have a phase shift between them will destroy the natural dynamics.
Incomplete Systems
Overlapping Systems
Hierarchical Systems
Explicit and Ambiguous Scale -> conditional self-similarity