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Spring, 2020: in the midst of on-line courses, due to the pandemic of Covid-19. With the onset of the Covid-19 coronavirus crisis, we focus on SIRD models, which might realistically model the course of the disease. We start with an SIR model, such as that featured in the MAA model featured
Mat375 SIR Math Modeling COVID-19 Coronavirus SIRD
Spring, 2020: in the midst of on-line courses, due to the pandemic of Covid-19.

With the onset of the Covid-19 coronavirus crisis, we focus on SIRD models, which might realistically model the course of the disease.

We start with an SIR model, such as that featured in the MAA model featured in

Without mortality, with time measured in days, with infection rate 1/2, recovery rate 1/3, and initial infectious population I_0=1.27x10-4, we reproduce their figure

With a death rate of .005 (one two-hundredth of the infected per day), an infectivity rate of 0.5, and a recovery rate of .145 or so (takes about a week to recover), we get some pretty significant losses -- about 3.2% of the total population.

Resources:
Coronavirus: A Simple SIR (Susceptible, Infected, Recovered) with death
Andrew E Long
34
 The bathtub problem exemplifies the archetype of goal seeking, where the stock behavior is determined by the interaction of the inbound and outbound flows. -----------  O problema da banheira exemplifica o arquétipo da busca de objetivos, onde o comportamento do estoque é determinado pela inte
If Then Else Rules Bathtub Problem; Ploblema Da Banheira
 The bathtub problem exemplifies the archetype of goal seeking, where the stock behavior is determined by the interaction of the inbound and outbound flows.
-----------
 O problema da banheira exemplifica o arquétipo da busca de objetivos, onde o comportamento do estoque é determinado pela interação dos fluxos de entrada e saída.

http://web.mit.edu/jsterman/www/Bathtub.pdf
Bathtub Problem with IF THEN rules
Cláudio Siervi
La situación modelada expresa el crecimiento de las ventas impulsadas por la motivación y productividad, pero es frenada por el tamaño del nicho de mercado.
Arquetipo Sistémico
La situación modelada expresa el crecimiento de las ventas impulsadas por la motivación y productividad, pero es frenada por el tamaño del nicho de mercado.
Límite de Crecimiento
Marcelo A. Castro Iglesias
361
World Dynamics developed by Jay Forrester (1971) is one of the classic system dynamics models. It is an important model because it has been the basis of the controversial and widely-debated world models used in the Club of Rome's report, also known as Limits to Growth (Meadows et al., 1972; Randers,
final exam SD303
World Dynamics developed by Jay Forrester (1971) is one of the classic system dynamics models. It is an important model because it has been the basis of the controversial and widely-debated world models used in the Club of Rome's report, also known as Limits to Growth (Meadows et al., 1972; Randers, 2004). 
World Dynamics model_v1
candidate no 141
3 weeks ago
This Insight Maker model illustrates the complex relationships involved in the destruction of rainforests. The reinforcing loop emphasizes the destructive cycle where economic development leads to increased deforestation, while the balancing loop highlights the negative consequences on biodiversity,
This Insight Maker model illustrates the complex relationships involved in the destruction of rainforests. The reinforcing loop emphasizes the destructive cycle where economic development leads to increased deforestation, while the balancing loop highlights the negative consequences on biodiversity, climate, and economic activities, attempting to counteract the destructive forces. The model serves as a simplified representation to better understand the interconnected factors contributing to rainforest destruction and the importance of considering feedback loops in addressing environmental issues.
Destruction of Rainforests
Sujhanan
2 days ago
The limits to growth structure is based on the basic growth structure. And, as should be obvious, nothing grows forever as growth requires resources. Those required resources become a limits to growth. See also  Archetypes . Video This model is part of And? Understanding Relationships & Th
Limits To Growth Archetype
The limits to growth structure is based on the basic growth structure. And, as should be obvious, nothing grows forever as growth requires resources. Those required resources become a limits to growth. See also Archetypes.
Limits to Growth
Gene Bellinger
60 8 months ago