49 citations · 315 across the 41 of their papers we have counts for
9 papers · 1 filter
study of the adsorption and dissociation of nitrogen molecule on Fe(111) surface
Myong-Song Ryang, Nam-Hyok Kim, Song-Jin Im
The adsorption and dissociation of nitrogen molecule on Fe(111) surface is studied by density functional theory calculations. The simulation results show that the molecule needs to…
First-principles study on electron field emission from nanostructures
Hyon-Chol Choe, Nam-Hyok Kim, Hyok Kim +1
A first-principles approach is introduced to calculate electron field emission characteristics of nanostructures, based on the nonequilibrium Green function technique combined with…
Study on acoustic radiation impedance at aperture of a waveguide with circular cross section taking account of interaction between different guided modes
Kyong-Su Won, Myong-Jin Kim, Song-Jin Im
In this paper we simulated self- and mutual- acoustic impedances of guided modes at the aperture and estimated accuracy of the piston radiation approximation. We used the Rayleigh…
Theoretical prediction of the source-detector separation distance suited to the application of the spatially resolved spectroscopy from the near-infrared attenuation data cube of tissues
Yong-Wu Ri, Sung-Hu Jong, Song-Jin Im
The modified Beer-Lambert law (MBL) and the spatially resolved spectroscopy are used to measure the tissue oxidation in muscles and brains by the continuous wave near-infrared spec…
Study on the Vibration Displacement Distribution of a Circular Ultrasonic Motor Stator
Chol-Su Ri, Myong-Jin Kim, Chol-Su Kim +1
In this paper is presented a theoretical consideration on the stator's displacement distribution, which is one of the most important problems in defining the structure of the circu…
Study on the Electronic Structure and Stability of Some OPE(oligo-phenylene-ethynylene derivative)-RE3N@C80 Dyads by PM7
Kye-Ryong Sin, Sun-Gyong Ko, Hong-Gol O +1
In this paper, we investigated the electronic structure and stability of some mesomorphic OPE-RE3N@C80 dyads from the oligo-phenylene-ethynylene derivatives (OPE) and the trimetall…