# Random Rotations Research

## Papers

**B. Stanfill**, H. Hofmann and U. Genschel. "rotations - An R Package for Rotation Data." submitted-
**B. Stanfill**, U. Genschel and H. Hofmann. "Point Estimation of the Central Orientation of Random Rotations." (2013),*Technometrics*, to appear November 2013

## Talks

*Inference for the Central Direction of Random Rotations in SO(3)*, Joint Statistical Meetings, August 8, 2013*Point Estimation of the Central Direction of Random Rotations in SO(3)*, Joint Statistical Meetings, August 4, 2011

## Posters

*Confidence Regions for the Central Orientation of Random Rotations*, ASA Iowa Chapter Meeting, Ames, IA, November 1, 2013*Estimating the Central Direction of Random Rotations in SO(3)*, CODA, Sante Fe, NM, February 29 - March 2, 2012-
*Point Estimation of the Central Direction of Random Rotations in SO(3)*, 4th Annual Midwest Statistics Research Colloquium, Madison, WI, March 18 and 19, 2011

## Proceedings

**B. Stanfill**, U. Genschel, H. Hofmann (2011). "Point Estimation of the Central Direction of Random Rotations."*JSM Proceedings*, Section on Physical and Engineering Sciences. Alexandria, VA: American Statistical Association, pp. 1883-1893.

## R Package

- rotations: Tools for working with rotation data.

# Physical Activity Research

## Papers

- G. Welk, Y. Kim,
**B. Stanfill**, D. Osthus, M. Calabro, S. Nusser and A. Carriquiry. "Validity of a 24-Hour Physical Activity Recall Instrument: The Physical Activity Measurement Survey."*MSSE*, submitted

## Talks

*Quantifying Recall and Processing Error when Utilizing the Compendium of Physical Activities in Physical Activity Recall Surveys*7th International Total Survey Error Workshop, Ames, Iowa June 2-4, 2013*A Modified Random Forest Procedure with Survey Applications*Survey Working Group, Iowa State University, October 1, 2012*Estimating the Probability of Compliance with Physical Activity Guidelines from a Bayesian Perspective, Revisited*Survey Working Group, Iowa State University, March 9, 2012*A Bayesian Approach to Model Daily Physical Activity*Survey Working Group, Iowa State University, October 10, 2011*Modeling Physical Activity Data*Survey Working Group, Iowa State University, March 28, 2011

## Posters

*A Measurement Error Model for Physical Activity Data*ASA Conference on Statistical Practice, New Orleans, LA, February 21-23, 2013*Estimating the Probability of Compliance with Physical Activity Guidelines from a Bayesian Perspective*ICDAM 8, Rome, Italy, May 14-17, 2012

# Miscellaneous

## Proceedings

- G. Batinov, W. Kofi, L. Miller, S. Nusser,
**B. Stanfill**, and K. Ashenfelter, (2013). "Evaluating the Impact of Spatial Ability in Virtual and Real World Environments."*The Sixth International Conference on Advances in Computer-Human Interactions*. Nice, France. February 24 - 28, 2013. pp. 274-279.

## Talks

*Total Survey Error: Robert Groves and Lars Lyberg*Survey Working Group, Iowa State University, February 1, 2013

*Assessing Program Effectiveness for a Youth Development Camp*Survey Working Group, Iowa State University, October 25, 2010