Demonstration of the EEE Model by Unnasch et al.

About the EEE Model Demo

This is a dynamic model for transmission of Eastern Equine Encephalitis Virus (EEEV) originally developed by Dr. Robert S. Unnasch of Sound Science LLC and parameterized with data collected from an EEEV endemic site in Alabama.  The major goal of developing this model was to examine the role that young-of-the-year (YOY) birds played in the dynamics of EEEV transmission.  A complete description of the model has been submitted for publication to Ecological Modelling.

Download the EEE Model Demo

1. In order to run the demonstration version of this model you must have installed on your computer either Stella (version 7.0 or higher) or the isee Player, which is a free runtime version of Stella.  To install the isee Player (available for Windows or Mac) navigate to the following web site to download and install the software: http://www.hps-inc.com/softwares/player/iseeplayer.aspx

2. Click on the following link to download the EEE Model demo file in a ZIP compressed archive: http://www.dom.uab.edu/geomed/unnasch/EEEdemover051705.zip

3. Open the downloaded ZIP archive to obtain the actual EEE Model demo file (EEEdemover051705.STM)

4. Follow the instructions below, or click on the following link to download the instructions in PDF format: http://www.dom.uab.edu/geomed/unnasch/EEEdemoreadme.pdf

Instructions for Running the EEE Model Demo

1. Open the EEE model demo file (EEEdemover051705.STM) with Stella or the isee Player.
   
   NOTE: If you are using the isee Player for Macintosh, you must convert the model file from a PC model by dragging and dropping the EEEdemover051705.STM file onto the "Drag and drop PC model(s) on me" application found in the "PC Model Conversion Utility" folder in the "Tools" folder of your "isee Player 8.1.5" folder.  Choose "STELLA Model" when you get the "Convert item(s) to:" prompt.

2. To view the model pages correctly, you should adjust your monitor resolution to 1280 x 1024.  The model will display at lower resolutions, however, the bottom and/or right side of the pages may be cutoff and there are no scroll bars available in this model.

3. This model contains two pages: (1) the Interface Page that allows one to manipulate four of the model’s parameters to run the model, and also navigate to the model page; and (2) the Model Page that presents the model.

   1. The Interface Page (Figure 1) contains two buttons, four parameter manipulation boxes, and three graphs.
      The two buttons allow the user to either navigate to the model page or to run the model.
      The four parameters that can be manipulated are:

      1. Avian Birth Rate, which is time dependent (left pink box).

      2. Relative (mosquito) feeding preference on YOY, which is time dependent (middle pink box).

      3. Mosquito Feeding Success on YOY, which is time dependent (right pink box).

      4. Mosquito Feeding Success on Adult Birds, which is constant throughout the season (purple box).

   2. The time dependent parameters can be manipulated by double-clicking on each of the pink boxes.  This brings up an interface window (Figure 2) that includes both a list of the parameter values for each time-step (day) and a graphical representation of these values.  The user can change any values by typing in new values or by grabbing and moving the line with the mouse by left-clicking and dragging the line.

   3. Mosquito Feeding Success on Adult Birds is changed by moving the dial knob in the purple box.

   4. Any changes can be undone by clicking on the small button labeled with the 'U’ in each parameter box.

4. The model can then be run by clicking on the “Run the model” button.  The results for each of the three modules (Adult Birds, YOY Birds, and Mosquito Population) are presented in the graphs on the Interface Page.  NOTE: the dependent axes are scaled independently for each parameter.

5. Clicking on the “See the Model” button navigates to a page showing the model (Figure 3).

   1. Clicking on any of the model’s components brings up a window that presents either a description of the component, or where appropriate the model’s equation.

   2. Clicking on the “Return to the Interface” button returns to the Interface Page.

Figures

Figure 1. EEE Model Interface Page	Figure 2. EEE Model Interface Window	Figure 3. EEE Model