EES 4760/5760

## Homework

### Preliminary Information

Upload your work to Brightspace when you’re done (Word or text files for the descriptions and ODD document, and .nlogo files for your NetLogo models).

When there is more than one file for a homework assignment, I recommend that you make a Zip file containing all of the files for the different parts of the assignment and upload the Zip file to Brighspace instead of uploading the files separately. When a homework assignment has more than one problem, and each problem has multiple files, it can be helpful to have a separate folder for each problem, and put all of these folders into the ZIP file that you turn in.

There are many free software apps for creating and working with Zip files, such as 7Zip for Windows and Keka and iZip for Mac.

Some problems in this homework set call for you to write a NetLogo model and also answer questions about the model. For answering the questions, you may take any of these approaches:

1. Edit the INFO page for your NetLogo model and add the following (this example is for exercise 2.3)

# Exercise 2.3

When I ran the model ...
2. Write your answer in a Word file or other document file (text, PDF, etc.) and put the homework answers there. You can either make a separate document for each exercise (e.g., answers for exercise 2.3 go in ex_2_3.docx, answers for exercise 3.3 go in ex_3_3.docx), or you can make a single document file (e.g., with the title homework_4_answers.docx) and put the homework answers in there, as follows:

• Exercise 2.3: When I ran the model …
• Exercise 3.3: This is how I would use a model to answer questions about the spread of COVID-19 …
3. If your answers include diagrams or other kinds of figures or illustrations that are a pain to do in Word, you can hand-write your answers (legibly!), take a photo of them, and upload the photo.

### Homework Exercises:

• Railsback & Grimm, Chapter 2, exercises Exercises 3–4.

For exercise 4 in chapter 2, you will make seven sequential modifications of the basic mushroom hunt model. Each step modifies the previous one, so the last model will have all the modifications from the bulleted list in Ex. 2.4. Save each model with a new name, such as ex_2_4a.nlogo, ex_2_4b.nlogo, , ex_2_4g.nlogo

• Railsback & Grimm, Chapter 3 exercise 3.

Write your answers in any convenient text format (a simple text file, a Word document, a .pdf file, or whatever suits you). Call the file ex_3_3.docx (or ex_3_3.pdf, etc.).

### Notes on Homework:

My advice for Chapter 3, Exercise 3 is don’t be too ambitious with your model, but keep it very simple. Don’t worry about getting everything right. If there are things you don’t feel sure about or don’t know how to express, you should just write a parenthetical note in your ODD document commenting on your difficulty. Come to class prepared to talk about how this exercise went and where you felt confused about trying to specify your model.