The next NANP Nutrition Models Workshop will be held on June 21, 2020 at the 2020 ADSA Annual Meeting. This workshop uses and exercises to illustrate how mathematical models are constructed, evaluated, and applied towards problems in animal nutrition. The workshop will give attendees a basic fluency in mathematical modeling and, in so doing, advance their use of models in nutrition research.

**Program**

- Welcoming remarks (Tim Hackmann, University of California, Davis)
- Tutorial on R
- Speaker: Veridiana Daley (Land O’Lakes)
- Objectives
- Ensure R statistical software is correctly installed on attendee laptops
- Walk through basic data manipulation, visualization, and other functions

- Model construction: lecture
- Speaker: Tim Hackmann (University of California, Davis)
- Objectives
- Discuss history of modeling and role in research
- Distinguish between different types of models (deterministic vs. static, etc.)
- Walk through steps of constructing a dynamic, deterministic model
- Write a model using a conceptual diagram
- Translate a model diagram into set of differential equations
- Explain different approaches for solving model equations

- Model construction: exercises
- Speaker: Tim Hackmann (University of California, Davis)
- Objectives
- Speaker constructs a model of rumen fermentation from first principles using
- Excel
- R

- Speaker constructs a model of rumen fermentation from first principles using

- Meta-analysis: lecture
- Speaker: Veridiana Daley (Land O’Lakes)
- Objectives
- Explain the theory and motivation of a meta-analysis

- Meta-analysis: exercises
- Speaker: Veridiana Daley (Land O’Lakes)
- Objectives
- Speaker shows meta-analysis with example dataset
- Attendees conduct own meta-analysis with second dataset and R script

- Lunch
- Model evaluation: lecture
- Speaker: Henk van Lingen (University of California, Davis)
- Objectives
- Identify strength, weakness, and relevance of different evaluation statistics (e.g., R2, CCC, RMSPE)
- Explain procedure and utility of sensitivity analysis

- Model evaluation: exercises
- Speaker: Henk van Lingen (University of California, Davis)
- Objectives
- Speaker conducts an evaluation with example dataset and R script
- Attendees conduct own evaluation with a second example dataset

- The Dairy NRC model: lecture
- Speaker: Mark Hanigan (Virginia Tech)
- Objectives
- Review major features and updates to Dairy NRC

- The Dairy NRC model: exercises
- Speaker: Mark Hanigan (Virginia Tech)
- Objectives
- Walk though Dairy NRC model
- Attendees formulate a diet

- Closing remarks (Tim Hackmann, University of California, Davis)

**Registration**

You can register at the website for the 2020 ADSA Annual Meeting.

**Sponsors**

USDA-NIFA & National Animal Nutrition Program

**Past years**

You can access materials from all past workshops here.