Since my formal retirement in 2004, I have been engaged in scholarly activity in a limited scope, with no postdoctoral associate or graduate student. It entails writing up the unpublished work, engaging in writing a textbook, reviewing manuscripts for journals and proposals for granting agencies, consulting industrial companies, participating in various advisory boards of research institutes and centers, attending technical conferences and making some contributions to activities of scientific societies. In addition, I have also been active in the Korean Studies Initiatives of the Center for East Asian Studies of the University of Wisconsin.
My interest in research however remains at the same level as before the retirement. It consists of: 1) transport and dynamics of macromolecules in bulk, solution and gels; 2) interfacial equilibrium and dynamic phenomena of amphiphiles including polymeric amphiphiles ; 3) biomedical applications of surface functionalized polymeric materials; 4) organic-inorganic composites for biocompatible uses.