SELECTED PUBLICATIONS

• STATISTICAL THEORY AND METHODS

Ombao H, Raz J, von Sachs R and Malow B. (2001). Automatic Statistical Analysis of Bivariate Non-Stationary Time Series. Journal of the American Statistical Association, 96, 543-560.

Ombao H, Raz J, Strawderman R and von Sachs R. (2001). A simple generalised cross validation method of span selection for periodogram smoothing. Biometrika,, 88, 1186-1192.

Ombao H, Raz J, von Sachs R and Guo W. (2002). The SLEX Model of a Non-Stationary Random Process. Annals of the Institute of Statistical Mathematics, 54, 171-200.

Guo W, Dai M, Ombao H and von Sachs R. (2003). Smoothing Spline ANOVA for Time Dependent Spectral Analysis. Journal of the American Statistical Association, 98, 643-652.

Huang H, Ombao H, and Stoffer D. (2004). The SLEX Approach to Discrimination and Classification of Non-Stationary Time Series. Journal of the American Statistical Association, 99, 763-774.

Ombao H, von Sachs R and Guo W. (2005). The SLEX Analysis of Multivariate Nonstationary Time Series , Journal of the American Statistical Association, 100, 519-531.

Bunea F, Ombao H and Auguste A. (2006). Minimax Adaptive Spectral Estimation from an Ensemble of Signals , IEEE Trans Signal Processing, 54, 2865-2873.

• INTERDISCIPLINARY RESEARCH



Buysse D, et al (2001). Sleep and Treatment Response in Depression: New Findings Using Power Spectral Analysis. Psychiatry Research.

Nofzinger E, et al (2002). Human Regional Cerebral Glucose Metabolism During NREM Sleep in Relation to Waking. Brain, 125, 1105-1115.

Moul D, Ombao H, et al (2002). The masking effects of posture and sleep onset on core body temperature have distinct circadian rhythms: results from a 90-min/day protocol. Journal of Biological Rhythms, 17(5):447-462.

Raz J, Zheng H, Ombao H and Turetsky B. (2003). Statistical Test for fMRI Based on Experimental Randomization. NeuroImage, 19(2), 226-232.

Germain A, Ombao H, et al (2003). Trait Anxiety and Coping Styles Modulate the Effects of Pre-SLeep Acute Stress on REM Sleep and Dreaming. Journal of Psychosomatic Medicine, 65, 857-864.

Gamalo M, Ombao H and Jennings R.(2004). Comparing Spatial Extent of Activation: A Robust Permutation Approach, NeuroImage, accepted for publication.

SLEX DEMO

• EEG (brain waves)recorded at the left temporal (T3) and left parietal channels (P3)
• Estimate of the time-varying log spectra
• Estimate of the time-varying coherence

EEG LINKS

• EEG Primer at Brown University Medical School