System Zoo Z109: Logistic growth with constant harvest from System Zoo 1 by Hartmut Bossel
Exercise 6 simulates a whale poplutation with a minimum reproductive capacity
Clone of System Zoo Z109 ex 6: Whale population
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
Stage 2 Model - Population
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
Oscillator with limit cycle from Z202 System Zoo 1 p84-87
Bossel: Z202 Van der Pol Oscillator
System Zoo Z103: Exponential growth and decay from System Zoo 1 by Hartmut Bossel
Bossel: Z103 Exponential growth and decay
Insight Maker model based on the Z415 System Zoo model originally developed in Vensim.
Clone of System Zoo Z415 Resource Extraction and Recycling
Fisheries model from Hartmut Bossel "System Zoo 3 Simulation Models: Climate Ecosystems, Resources"
Clone of System Zoo 409
System Zoo Z106b: Simple population dynamics from System Zoo 1 by Hartmut Bossel
Clone of System Zoo Z106b: Simple population dynamics
System Zoo Z109: Logistic growth with constant harvest from System Zoo 1 by Hartmut Bossel
Exercise 6 simulates a whale poplutation with a minimum reproductive capacity
Clone of System Zoo Z109 ex 6: Whale population
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!
Clone of System Zoo Z107-ex2: Infection dynamics with immune subpopulation
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 Z109: Logistic growth with constant harvest from System Zoo 1 by Hartmut Bossel
Bossel: Z109 Logistic growth with constant 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 Z101: Single integration from System Zoo 1 by Hartmut Bossel
AA_Zoo Z101: SIN_input
System Zoo Z106: Simple population dynamics from System Zoo 1 by Hartmut Bossel
Clone of System Zoo Z106: Simple population dynamics
System Zoo Z105: Time-dependent growth from System Zoo 1 by Hartmut Bossel
Clone of System Zoo Z105: Time-dependent growth
Adapted from:
System Zoo Z409 Fishery dynamics from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
Fisheries represent an interaction between ecological and economic systems. All else being equal, fish populations can sustain fishing indefinitely if extraction rates are below renewal rates, but above this, catch starts to fall with increasing fishing effort. Economic pressure makes it difficult to stay below those limits.
It is necessary for fishers to meet their costs to keep fishing over time, so a minimum profit must be met; as more people join the fishery, there is less available for each person fishing. Unmanaged fisheries are often over-exploited so that catch is much lower than it could be. Proper management often means putting limits on people - limiting the number of boats or number of fish that can be caught.
REM 221 - Z409 Fishery dynamics (adapted)
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.
Bossel: Z602 Population with four age groups
System Zoo Z109: Logistic growth with constant harvest from System Zoo 1 by Hartmut Bossel
Exercise 6 simulates a whale poplutation with a minimum reproductive capacity
Clone of System Zoo Z109 ex 6: Whale population
This model simulates the takeoff of an aircraft (A320) without flaps, but with wind.
Erklärvideo (deutsch) https://youtu.be/S4hvndl2SfI
Takeoff of an aircraft
System Zoo Z409 Fishery dynamics from Hartmut Bossel (2007) System Zoo 2 Simulation Models. Climate, Ecosystems, Resources
Fishing is a classic example for use of a renewable resource. Unless overfished, fish populations If is hardly by fishing, then the fish population will persist at a constant size corresponding to its specific ecological envi ronment If the stock is overfished, the juvenile generation becomes too small to fully replace the adult generation. If overfishing continues. the population cannot recover and will collapse in short time. Even if fish catch stops now/, it could take decades until the fish population recovers to its original size if it hasn't become extinct meanwhile. In many of the world overtlshing has led, and still leads, to the complete collapse of formerly huge tlsh populations: herring in the North Sea, codtlsh in the Northern Atlantic. tuna, whales to name only a few. With the collapse of fish stocks came the collapse of the t1shing industry in many regions. Employment and
incomes disappeared: whole regions (like Newfoundland) lost their economic base.
Bossel: Z409 Fishery dynamics
Acest model este adaptat după reprezentarea lui Harmut Bossel, în lucrarea "System Zoo 3 Simulation Models, Economy, Society, Development."
Utilizarea modelului ne poate ajuta pentru a vizualiza evolutia populatiei pe grupe de varsta sau pentru a gestiona probleme cum ar fi ocuparea forței de muncă.
Clone of Z602 Population with four age groups
