Associate Professor of Statistics

Ph.D. in Biostatistics, University of Michigan, 1999

Personal Website

Research Interests

• Theory and Methods of Time Series Analysis
• Applications to Neuroscience
• Finance and Geophysics

Honors and Appointments

• Affiliate Member, Cognitive Neuroscience Group, The Beckman Institute, UIUC, (2002 - )
• Associate Editor, Journal of the American Statistical Association, (2005 - )

Selected Publications: 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 GCV 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 Non-Stationary Random Process, Annals of the Institute of Statistical Mathematics, 54, 171-200
• Huang, H., Ombao, H. and Stoffer D. (2004). Classification and Discrimination of Non-Stationary Time Series Using the SLEX Model, Journal of the American Statistical Association, 99, 763-774.
• Ho, M., Ombao, H. and Shumway, R. (2005). Modelling Brain Dynamics: A State-Space Approach, Statistica Sinica, 15, 407-425.
• Ombao, H., von Sachs, R. and Guo, W. (2005). SLEX Analysis of Multivariate Non-Stationary 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 Transactions on Signal Processing, 54, 2865-2873.

Selected Publications: Applications

• Buysse, D., Hall, M., Begley, A., Cherry, C., Land, S., Ombao, H., Kupfer, E. and Frank, E. (2001). REM Sleep and Treatment Response in Depression: New Findings Using Power Spectral Analysis, Psychiatry Research, 103, 51-67.
• Moul, D., Ombao, H., Monk, T., Chen, Q., Begley, A., and Buysse, D. (2002). Masking effects of posture and sleep onset on core body temperature: a circadian rhythm of bedtime temperature drops, Journal of Biological Rhythms, 17, 447-462.
• Hall M, Vasko R, Buysse D, Ombao H, Chen Q, Cashmere D, Kupfer D and Thayer J. (2004). Acute Stress Affects Heart Rate Variability During Sleep. Journal of Psychosomatic Medicine, 66, 56-62.
• Buysse, D., Nofzinger, E., Germaine, A., Meltzer, C., Wood, A., Ombao, H., Kupfer, D. and Moore, R. (2004). Regional Brain Glucose Metabolism During Morning and Evening Wakefulness in Humans: Preliminary Findings. SLEEP, 27, 1245-1254.