A time-dependent proportional hazards survival model for credit risk analysis. - Joon-Ku Im; Daniel W. Apley; C. Qi; X. Shan (J. Oper. Res. Soc., 2012)

Tangent Hyperplane Kernel Principal Component Analysis for Denoising. - Joon-Ku Im; Daniel W. Apley; George C. Runger (IEEE Trans. Neural Networks Learn. Syst., 2012)

Projection-free kernel principal component analysis for denoising. - Anh Tuan Bui; Joon-Ku Im; Daniel W. Apley; George C. Runger (Neurocomputing, 2019)