# User talk:Tak89/Benchmark II: Model Description

## Student Comments

-Insert "a" before "limit" in assumption 1 for proper grammar.

-Add in units for the values in the parameter table.

-As mentioned by Dr. Chiel, the natural growth rate of bacteria term is not a logistic term because of the reason that it can reach a carrying capacity. The carrying capacity is dependent on both the growth rate and death rate terms.

-I thought this was a good model description overall although I feel that more detail in the description of your equations would be helpful.

--Michael Hasson (talk) 23:14, 16 April 2017 (EDT)

I think that the numbered list combined with each one starting with "The first assumption", etc., appears redundant and would read better if you chose just one of those two to use. I also feel that you description of the equations could be a little more detailed. Explain specifically what each equation does- why are the parameters/variables in them used? How do they affect the end result of the equation? Explicitly stating the relationship between each one could be helpful. --Thomas Schlechter (talk) 22:53, 17 April 2017 (EDT)

## Instructor Comments

- Benchmark submitted on time?
- Yes

- Rubric submitted on time?
- Yes

- State variables, parameters and inputs to the model clearly distinguished?
- Yes

- Term-by-term description of model components?
- This could be improved. You borrow the language from the paper to describe the terms, rather than describing them in your own words.

- Have you described model assumptions?
- Yes

- Description of equation simulation?
- Yes

On the whole, this is a good to very good draft of the model description. In some cases, your language could be clearer. There are also statements that are problematic. You say, for example “the growth rate of bacteria follows a logistic model since the bacteria can reach a carrying capacity.” But the term is not really a standard logistic term, as the authors point out later in the paper, in the section “Some Mathematical Remarks”. Later, you say “the rate at which neutrophils kill bacteria is based on the Michaelis-Menten predator-prey model.” This is also not really correct - the predator prey model is different from Michaelis Menten kinetics, and you need to make sure you understand the differences. You should review the definitions of the different kinds of terms that are found in your equations by referring to Chapter 5 of the textbook and rewrite and clarify. Also, when you say “The death rate is based on the size of the population of bacteria” and then present the term delta B(t) with no further comment, you are not really describing it clearly. In words, this term is “the death rate of the bacteria multiplied by the number of bacteria at time t”, and that would be a correct description. Following this approach would improve your description of the model throughout. Your detailed descriptions of how the figures were reconstructed was very good to excellent; make sure to describe conceptually what is being done before describing the implementation details. In your final term paper, make sure to add details about your extension here.

--Hillel Chiel (talk) 12:22, 9 April 2017 (EDT)