Current Research Interests:

Nonparametric multivariate analysis methods;
mode analysis; cluster trees; spanning trees; generalized single linkage clustering;
assessing significance of clusters; pruning and merging procedures; high-dimensional density estimation
Graphics/Visualization in high dimensions;
characterizing subspaces of density estimates; variable/subspace selection
Text Mining, Record Linkage, Disambiguation;
clustering/classification algorithms for disambiguating and linking text records or files;
determining and characterizing networks of colleagues and innovation
Exploring hierarchical latent class structures;
developing alternative methodology to cognitive diagnosis models to identify disparate skill set profiles;
integrating instructional assisting and ability assessment;
Characterizing sleep duration, quality, consistency, and its association with health; sleep stability