Delaying the peak of the COVID-19 epidemic with travel restrictions

Abstract Objectives: Travel restrictions is an often-used tool for governments to prevent the spread of COVID-19. Methods: We here used a simple simulation model to investigate the potential effects of travel restrictions within a country. Results: We found that travel restrictions can delay the peak of the epidemic considerably, but do not affect the spread within the country. We also investigated the effect of implementing travel restrictions early or later in the epidemic, and found that fast implementation is crucial for delaying the epidemic. Conclusions: Fast implementation of travel restrictions is crucial for delaying the peak of a subsequent outbreak of COVID-19 within a country.

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A simple simulation model for complex coacervates

Soft Matter ◽

10.1039/d1sm00881a ◽

2021 ◽

Author(s):

Sai Vineeth Bobbili ◽

Scott Milner

Keyword(s):

Phase Diagram ◽

Aqueous Solution ◽

Phase Separation ◽

Simulation Model ◽

Simple Simulation ◽

The Impact ◽

Oppositely Charged

When oppositely charged polyelectrolytes mix in an aqueous solution, associative phase separation gives rise to coacervates. Experiments reveal the phase diagram for such coacervates, and determine the impact of charge...

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Population Dynamics and Possible Management Options for the Rock Dassie Procavia capensis Population in the Tsitsikamma Coastal National Park

Koedoe ◽

10.4102/koedoe.v30i1.507 ◽

1987 ◽

Vol 30 (1) ◽

Cited By ~ 2

Author(s):

N. Fairall ◽

N. Hanekom

Keyword(s):

Population Dynamics ◽

Simulation Model ◽

National Park ◽

Management Strategies ◽

Management Options ◽

Simple Simulation ◽

Demographic Study ◽

Procavia Capensis

A demographic study of the rock dassie population in the Tsitsikamma Coastal National Park rest camp has provided data that is used to construct a simple simulation model and it is applied to evaluate different management strategies for the rock dassie population.

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A simple simulation model to estimate indoor absorbed γ radiation doses in air

Indian Journal of Physics ◽

10.1007/s12648-020-01708-4 ◽

2020 ◽

Author(s):

M. Orabi

Keyword(s):

Simulation Model ◽

Radiation Doses ◽

Γ Radiation ◽

Simple Simulation

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A simple simulation model can reproduce the thermodynamic folding intermediate of apoflavodoxin

Proteins Structure Function and Bioinformatics ◽

10.1002/prot.22521 ◽

2009 ◽

Vol 78 (1) ◽

pp. 73-82 ◽

Cited By ~ 13

Author(s):

María Larriva ◽

Lidia Prieto ◽

Pierpaolo Bruscolini ◽

Antonio Rey

Keyword(s):

Simulation Model ◽

Folding Intermediate ◽

Simple Simulation

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Phylogeny can make the mid-domain effect an inappropriate null model

Biology Letters ◽

10.1098/rsbl.2005.0297 ◽

2005 ◽

Vol 1 (2) ◽

pp. 143-146 ◽

Cited By ~ 14

Author(s):

T Jonathan Davies ◽

Richard Grenyer ◽

John L Gittleman

Keyword(s):

Species Richness ◽

Simulation Model ◽

Null Model ◽

Range Size ◽

Ecological Studies ◽

Tree Shape ◽

Speciation Model ◽

Simple Simulation ◽

Geographical Dimension ◽

Species Being

The mid-domain effect (MDE), a bias in species richness towards the midpoint of a given geographical dimension, has been used as a null model in macro-ecological studies. Departures from a MDE are often thought of as interesting. The MDE is a product of the interaction between geometric boundaries and range locations, with species being forced to occupy more central positions in proportion to their range size. We criticize this mechanism for assuming species' locations to be wholly independent from their evolutionary past. We present a simple simulation model that shows how range locations arising as part of a phylogenetic process depart from a MDE. The amount of departure is positively correlated with phylogenetic imbalance (tree shape), but a deviation from an equal-rates Markov speciation model is not necessary to negate a MDE. We suggest that the MDE is an appropriate ecological null model only when phylogenetic influence on range location is demonstrably low or non-existent.

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A Simple Simulation Model of International Bank Lending

International Finance Discussion Paper ◽

10.17016/ifdp.1987.307 ◽

1987 ◽

Vol 1987 (307) ◽

pp. 1-33

Author(s):

Henry S. Terrell ◽

◽

Robert S. Dohner

Keyword(s):

Simulation Model ◽

Bank Lending ◽

International Bank ◽

Simple Simulation

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Climate Change Impact on Design and Building Criteria of Infrastructure Assets - Simulation Model

10.32920/ryerson.14665020 ◽

2021 ◽

Author(s):

Youcef Brahimi

Keyword(s):

Climate Change ◽

Simulation Model ◽

Climate Change Impact ◽

Environmental Changes ◽

Construction Project ◽

Design Codes ◽

Control Parameters ◽

Simple Simulation ◽

Current Design ◽

Change Impact

Current design codes and criteria for the construction of infrastructure assets is unable to account for anticipated environmental changes due to climate change. This study developed a simple simulation model based on MS Excel Precision Tree to consider the effects of adding a correction factor for climate change to justify then intent to proceed or not with a construction project. After many iterations, it appears that climate change can result abandoning certain projects as any investment in them would to be beneficial. A simulation model was also developed to determine the allocation of funds for an initial construction project using climate change control parameters. This model showed that for a 100-year span, on average, there would be a deficit caused by costs involved with repairing the asset due to climate change deterioration. This can be counteracted by attributing 95% contingency to reduce the risk of climate change damage to 5%.

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