ii

The thesis of Jin ha Kim has been reviewed and approved* by the following:

Chita R. Das

Professor of Computer Science and Engineering

Thesis Advisor

Chair of Committee

Wang Chien Lee

Associate Professor of Computer Science and Engineering

Thomas La Porta

Professor of Computer Science and Engineering

C. Lee Giles

Professor of Information Sciences and Technology

DongWon Lee

Assistant Professor of Information Sciences and Technology

Raj Acharya

Professor of Computer Science and Engineering

Head of Computer Science and Engineering

*Signatures are on file in the Graduate School.