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# Mathematical and Statistical Models Examples

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Genetic Drift part of Examples
In this biology simulation, students use a mathematical simulation of genetic drift to answer questions about the factors that influence this evolutionary process. Students run a series of simulations varying allele frequency and population size and then analyze their data and propose a model to explain their results.

Earth System Topics: Evolution, Biosphere

Human Demographics part of Examples
In this biology simulation students explore factors that change human population growth including age at which women begin to bear children, fertility rate and death rate.

Earth System Topics: Human Dimensions:Population, Human Dimensions, Biosphere

World Population Activity II: Excel part of Examples
(Activity 2 of 2)In this intermediate Excel tutorial students import UNEP World population data/projections, graph this data, and then compare it to the mathematical model of logistic growth.

Earth System Topics: Human Dimensions:Population

World Population Activity I: Excel part of Examples
(Activity 1 of 2) This activity is primarily intended as an introductory tutorial on using Excel. Students use Excel to explore population dynamics using the Logistic equation for (S-shaped) population growth.

Earth System Topics: Human Dimensions:Population

Wind Surge: Interactive On-line Mac and PC part of Examples
Wind surge is a JAVA based applet for exploring how water level on the windward and leeward side of a basin depends on wind speed, basin length, water depth, and boundary type.

Earth System Topics: Human Dimensions:Natural Hazards, Atmosphere, :Weather

Planck Radiation Laws: Excel; Mac or PC part of Examples
Students use an existing Excel workbook to investigate how spectral irradiance from a blackbody radiator depends on temperature, Excel Mac or PC

Earth System Topics: Climate, Atmosphere

Wave Superposition: Interactive On-line Mac and PC part of Examples
An Interactive JAVA environment to allow one to look at the linear superposition of up to 4 ocean waves

Earth System Topics: Oceans

Fishing Game: Stella PC and Mac part of Examples
As manager in the fish and wildlife service you are charged with making policy regarding the management of a regional fishery.

Earth System Topics: Human Dimensions:Resources, Biosphere, Human Dimensions:Policy, Human Dimensions

Sea Floor Spreading II part of Examples
Students import ocean bathymetry data from text files, they then use Excel to graph these observations along with model prediction to assess the model's ability to simulated the observed topographic features of the North Atlantic.

Earth System Topics: Solid Earth, Oceans

Salmon Smolt: Stella PC and Mac part of Examples
The Stella Smolts Migration Model focuses on the spring migration of hatchery smolts to the ocean. It may be used to test the relative merits of barging fish or drawing down the reservoirs to help the smolts reach the ocean.

Earth System Topics: Biosphere, Human Dimensions:Resources