Disease phenotype and genotype are associated with shifts in intestinal-associated microbiota in inflammatory bowel diseases 　 　 Genome wide expression differences in disease-unaffected ileal mucosa in inflammatory bowel diseases. 　 Ph. D Dissertation: Structural Equation Modeling with Time Series, applicable to finance models, functional magnetic resonance imaging (fMRI) data and time-course microarray data, collaborated with Brookhaven National Laboratory. 　 Comparative study on orthogonal and geometric mean regression, collaborated with Brookhaven National Laboratory. 　 Joint Multivariate Analysis on Aerosol Mass Spectra, funded by SciDAC program of Department of Energy. 　 Compound Cluster Analysis on neuronal microarray data, collaborated with Cold Spring Harbor Laboratory. 　 Partial Correlation Network Analysis to identify nicotine dependence SNPs, collaborated with National Institution on Drug Abuse. 　 Pathway Analysis in Inflammatory Bowel Diseases Study, collaborated with Department of Medicine, Washington University at St. Louis.