System Zoo Z418 - Sustainable Use of a renewable resource from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources

System Zoo Z109: Logistic growth with constant harvest from System Zoo 1 by Hartmut Bossel

System Zoo Z106b: Simple population dynamics from System Zoo 1 by Hartmut Bossel

System Zoo Z111: Density-dependent growth (Michaelis-Menten) from System Zoo 1 by Hartmut Bossel

Z203 from System Zoo 1 p88-90

Z205 from System Zoo 1 p95-98

Oscillator with limit cycle from Z202 System Zoo 1 p84-87

​System Zoo Z412 Tourism Dynamics from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources

Adapted from Hartmut Bossel's "System Zoo 3 Simulation Models, Economy, Society, Development."

​Population model where the population is summarized in four age groups (children, parents, older people, old people). Used as a base population model for dealing with issues such as employment, care for the elderly, pensions dynamics, etc.

Perceptual Control Theory Model of Balancing an Inverted Pendulum. See Kennaway's slides on Robotics. as well as PCT example WIP notes. Compare with IM-1831 from Z209 from Hartmut Bossel's System Zoo 1 p112-118

System Zoo Z418 - Sustainable Use of a renewable resource from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources

Z204 from System Zoo 1 p91-94

​System Zoo Z412 Tourism Dynamics from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources

Z209 from Hartmut Bossel's System Zoo 1 p112-118. Compare with PCT Example IM-9010

Z204 from System Zoo 1 p91-94

Often a single prey population is the source of food for several  competing predators (e.g. mice as prey of foxes and birds of prey)​. Here again a reliable intuitive assessment of long-term development resulting from the particular system relationship is impossible. A simulation model can assist in recognizing development trends inherent in the system structure even if in reality a variety of other factors determine the development and may cause it to proceed on a somewhat different path.

Rotating Pendulum Z201 from System Zoo 1 p80-83

Z207 from Hartmut Bossel System Zoo 1 p103-107

After running the default settings Bossel describes A=0.2, B=0.2, Initial Values X=0 Y=2 and Z=0 and varying C=2,3,4,5 shows period doubling and transition to chaotic behavior

Often a single prey population is the source of food for several  competing predators (e.g. mice as prey of foxes and birds of prey)​. Here again a reliable intuitive assessment of long-term development resulting from the particular system relationship is impossible. A simulation model can assist in recognizing development trends inherent in the system structure even if in reality a variety of other factors determine the development and may cause it to proceed on a somewhat different path.

System Zoo Z106a: Simple population dynamics from System Zoo 1 by Hartmut Bossel

Z203 from System Zoo 1 p88-90

Insight Maker model based on the Z415 System Zoo model originally developed in Vensim.

Z209 from Hartmut Bossel's System Zoo 1 p112-118

Bipolar II treatment modeling using Van der Pol-like oscillators.

In this simulation an afflicted individual with Bipolar II disorder is put to treatment after 20 months the calibration of the medicine or treatment he recieves is such that it simulates the natural cycles of a "normal being". You can note by manipulating the parameters that sometimes too much treatment disrupts equilibria. Also note that in the state diagrams there are 2 limit cycles, the lower one being the healthiest as there are less changes.