REM 221 - Z301 Regional Water Balance
Thanks to
https://insightmaker.com/insight/1830/Rossler-Chaotic-Attractor
for this example of chaos, and the transition to chaos. "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."
We're looking into environmental applications in our course, and how dramatically dynamics can change, based on a small change in parameters. Climate change "suffers" this chaotic behavior, we fear, and we're going to be "taken by surprise" when the dynamics changes on us suddenly....
Andy Long
The Rossler Chaotic Attractor
This models the progressive decline of the ability for self-reliance and the growing dependence on outside help. Z508 p39-42 System Zoo 3 by Hartmut Bossel. Strong outside help causes a collapse of self-help capacity. Weak outside help produces a stable combination of wellbeing and self-help capacity.
Bossel: Z508 Clone of Dependence
Model 409a from Bossel "System Zoo 2". I have added some stochasticity to to the population specific growth rate.
A Simple Fishery
Z206 from Hartmut Bossel System Zoo 1 p99-102 See also a beautiful Youtube 3D Video Simulation
Lorenz Attractor
System Zoo Z110: Logistic growth with stock-dependent harvest from System Zoo 1 by Hartmut Bossel
Bossel: Z110: Logistic growth with stock-dependent harvest
Insight Maker model based on the Z415 System Zoo model originally developed in Vensim.
Clone of System Zoo Z415 Resource Extraction and Recycling
System Zoo Z418 - Sustainable Use of a renewable resource from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
Clone of ENV221 - Z418 - Sustainable Use of a renewable resource
System Zoo Z104: Exponential delay from System Zoo 1 by Hartmut Bossel
Bossel: Z104 Exponential delay
System Zoo Z107: Infection dynamics from System Zoo 1 by Hartmut Bossel
Bossel: Z107 Infection dynamics
A simple model revolving around the inventory of a car dealership. It illustrates the feedback mechanism used to maintain an adequate amount of stock (cars) to satisfy customer demand, and includes the perception, delivery and response delays.
A Business Model
System Zoo Z105: Time-dependent growth from System Zoo 1 by Hartmut Bossel
Bossel: Z105 Time-dependent growth
System Zoo Z404 Prey and two Predator Populations from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
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.
Clone of REM 221 - Z404 Prey and two Predator Populations
Fischfangsystem
System Zoo Z409 von Hartmut Bossel (2007): System Zoo 2 Simulationsmodelle. Klima, Ökosysteme und Ressourcen. Norderstedt.
Fischfang ohne Ortungstechnik
System Zoo Z111: Density-dependent growth (Michaelis-Menten) from System Zoo 1 by Hartmut Bossel
Bossel: Z111: Density-dependent growth (Michaelis-Menten)
System Zoo Z108: Overloading a buffer from System Zoo 1 by Hartmut Bossel
Bossel: Z108: Overloading a buffer
System Zoo Z107 exercise 2: Infection dynamics, exercise 2 (a part of the population is immune to infection) from System Zoo 1 by Hartmut Bossel
This is my attempt at the problem, not necessarily correct!
Bossel: Z107-ex2: Infection dynamics with immune subpopulation
Z205 from System Zoo 1 p95-98
Clone of Chaotic Bistable Oscillator
System Zoo Z412 Tourism Dynamics from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
Bossel: Z412 Tourism Dynamics
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.
Clone of Z602 Population with four age groups
System Zoo Z111 H Bossel p47 a variant of Michaelis Menten Enzyme Kinetics. See also IM-854 for Hannon and Ruth and IM-855 for receptor version and IM-856 for a bond graph view
Density Dependent Growth (Michaelis-Menten)
System Zoo Z415 Resource extraction and recycling from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
Smaller initial stock, bigger demand, and lower depletion of a nonrenewable resource.
For some important resources the almost nent within the next few decades. Estimates not be based on current consumption rate must account for the probable increase of tion of' "dynamic life time", which can be share will accelerate the
exhaustion of stocks is immi- "life time" of resources must a "static" life time index) but rate. This leads to the calcula-shorter than the static life time. Calculation of static and dynamic life time can at best serve to determine the bounds of actual life time of a resource. As a resource becomes scarce, its consump- tion must approach zero thus lengthening the calculated life time. The relative amount of remaining resources, i.e. scarcity, will therefore determine the development of the consumption rate. If material is recycled, it is important to know how quickly a product is scrapped and material is returned to the production process. A model de-scribing the dynamics of nonrenewable resource use must account for these processes.
Clone of Clone of REM 221 - Z415 Resource extraction and recycling
