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The Structural Features and Rotational Barriers in Indenyl Allyl Metal Complexes
Sungkwon Kang Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.6
The electronic structure, conformational preferences, and rotational barriers have been studied for transition metal indenyl allyl complexes by means of extended Huckel calculations. After geometrical optimization the exo conformation of allyl moiety is favored over the endo. The rotational barrier of indenyl ring in (Indenyl)Mo(CO)_2(Allyl)$ is computed to be 3.8 kcal/mol. Population analysis is applied to account for the conformational preferences and rotational barriers. A series of substituted allyl complexes has been also optimized. It shows steric hindrance plays a crucial role in setting the allyl orientation.
SUFFICIENT CONDITIONS AND CONSTRUCTION OF SYMMETRIC BIBD
KANG, SUNGKWON,JUNG, YOON-TAE,LEE, JU-HYUN The Honam Mathematical Society 2002 호남수학학술지 Vol.24 No.1
Some sufficient conditions on the existence and uniqueness of certain symmetric balanced incomplete block design are introduced. Also, a construction algorithm for the design and some examples are presented. The algorithm is developed based on the construction of subspaces of the three-dimensional vector space over a field.
Sungkwon Kang,Ju-Hyun Lee 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1-2
Motivated by the field experimental designs in agriculture, the theory of block designs has been applied to several areas such as statistics, combinatorics, communication networks, distributed systems, cryptography, etc. An explicit formula and its fast computational algorithm for a class of symmetric balanced incomplete block designs are presented. Based on the formula and the careful investigation of the modulus multiplication table, the algorithm is developed. The computational costs of the algorithm is superior to those of the conventional ones.
SUFFICIENT CONDITIONS AND CONSTRUCTION OF SYMMETRIC BIBD
KANG, SUNGKWON,JUNG, YOON-TAE,LEE, JU-HYUN 호남수학회 2002 한국수학학술지 Vol.24 No.1
Some sufficient conditions on the existence and uniqueness of certain symmetric balanced incomplete block design are introduced. Also a construction algorithm for the design and some examples are presented_ The algorithm is developed based on the construction of subspaces of the three-dimensional vector space over a field.
KANG, SUNGKWON,LEE, JU-HYUN 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1
Motivated by the field experimental designs in agriculture, the theory of block designs has been applied to several areas such as statistics, combinatorics, communication networks, distributed systems, cryptography, etc. An explicit formula and its fast computational algorithm for a class of symmetric balanced incomplete block designs are presented. Based on the formula and the careful investigation of the modulus multiplication table, the algorithm is developed. The computational costs of the algorithm is superior to those of the conventional ones.
김관태(Sungkwon Jo),조성권(Kwan-Tae Kim),강희석(Hee Seok Kang),변성현(Sung Hyun Pyun),이대훈(Dae Hoon Lee),송영훈(Young-Hoon Song) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
As increasing the regulations about environment, removal technologies of global warming gases have been studied by many research groups. N₂O is one of global warming gases and needs to be removed before emission of exhaust gases. In this study, MnO₂/Al₂O₃ and Ru/Al₂O₃ are considered as a catalyst. Based on the experiment, Ru/Al₂O₃ is employed in the tests of plasma assisted catalytic reactor due to higher decomposition rate of N₂O. A rotating arc that is one of gliding arcs is used. From the experiments, we found that the arc plasma removes some of N₂O and the rest is removed by Ru/Al₂O₃ catalyst. As byproducts, small amount of NO₂ that can be removed by a scrubber is measured, but NO is not detected. From this work, the feasibility of the combination of plasma and catalyst is confirmed and further studies are needed to realize this hybrid system in real applications.
Legendre Tau Method for the 2-D Stokes Problem
Jun, SeRan,Kang, SungKwon,Kwon, YongHoon 한국산업정보응용수학회 2000 한국산업정보응용수학회 Vol.4 No.2
A Legendre spectral tau approximation scheme for solving the two-dimensional stationary incompressible Stokes equations is considered. Based on the vorticitystream function formulation and variational forms, boundary value and normal derivative of vorticity are computed. A factorization technique for matrix stems based on the Schur decomposition is derived. Several numerical experiments are performed.