Logistic Population Model

Here is a simple system dynamics model that shows logistic population growth. This model includes a value “k” for carrying capacity that can be adjusted using a slider. This model uses a chip and multiple layers to keep things organized. The top layer “logistic,” has sliders that allow users to adjust carrying capacity, initial population, and rate of growth. The 2nd layer, “population” contains “in” and “out” flows that symbolize births and deaths.

Nova Online:  Logiistic Population Model (opens in new tab)

Running this model:
1. Click on the “Capture” button in the tool bar.
2. Click “Load” next to “Capture.”
3. Click “Exec” to run the model through multiple iterations. Click “Stop” to stop the graph.
4. To run the model step by step, click “Capture,” “Load,” “Init,” then “Step.”