Prof. Shim has developed the computational method combining the density function theory and dynamical mean field theory (DFT+DMFT) for description of strongly correlated electron system. Using this method it becomes available to describe the electronic structures of d- and f-electron systems such as transition metal, rare earth and actinide compounds. Due to a variety of low energy phenomena they can exhibit, and sensitivity of these phenomena to chemistry and structure, there is a strong need for the first-principles predictive understanding of these materials. Recently, he also developed and applied those methods for the description of molecular orbital system which behaves like artificial d- and f-electron systems.