이상훈 교수

Plastic deformation of semicrystalline polyethylene has been investigated via atomistic Monte Carlo and molecular dynamics simulations. Two deformation modes are considered, both consisting of tensile deformation in the longitudinal direction of the lamellar stack, with either constant lateral dimensions or constant total volume. Stress−strain curves, elastic moduli, yield stresses, and strains are determined at 350 K, with deformation strain rates (in molecular dynamics) ranging from 5 × 106 to

SPO at the level of pseudarthrosis was a safe and effective technique to correct sagittal imbalance without vascular complication. Surgical repair of pseudarthrosis with AIF provided successful fusion and good clinical results. For patients with lumbar hypolordosis, additional PSO was effective in restoration of sagittal balance.

South Korea has a plan to realize a hydrogen economy, and it is essential to establish a main hydrogen pipeline for hydrogen transport. This study develops a cost estimation model applicable to the construction of hydrogen pipelines and conducts an economic analysis to evaluate various scenarios for hydrogen pipeline construction. As a result, the cost of modifying an existing natural gas to a hydrogen pipeline is the lowest, however, there are issues with the safety of the modified hydrogen pip

Dielectric constants of electrolytic organic solvents are calculated employing nonpolarizable Molecular Dynamics simulation with Electronic Continuum (MDEC) model and Density Functional Theory. The molecular polarizabilities are obtained by the B3LYP/6-311++G(d,p) level of theory to estimate high-frequency refractive indices while the densities and dipole moment fluctuations are computed using nonpolarizable MD simulations. The dielectric constants reproduced from these procedures are evaluated