• Korea Information Processing Society Review
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• v.19 no.3
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• pp.95-100
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• 2012

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.907-909
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• 2004

에어포일(airfoil)이 공기속을 지날 때 양력이 발생한다. 공간상을 비행하는 물체에는 중력, 추력, 양력, 항력의 네 가지 힘이 작용한다. 본 논문에서는 항공역학의 연구결과를 바탕으로 차이니즈탑이란 물체가 회전하면서 수직상승과 호버링 그리고 하강하는 동안의 운동형태를 사실적이면서도 실시간으로 구현한다. 그 결과는 게임이나 비행 시뮬레이션에 응용할 수 있다.

• Journal of the Korean Chemical Society
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• v.31 no.1
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• pp.84-93
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• 1987

The study was done with a focus on making the optimum condition on phosphorylation of deoxyribonucleoside with o-chlorophenylphosphoroditriazole as a phosphorylating agent. The result showed that the addition of 5 volume % pyridine to the dioxane solution accelerated the rate of reaction to a great extent and turned out to nearly quantitative yields on phosphorylation. On the basis of this improvement of optimum reaction conditions, a more efficient method to synthesize all-protected dideoxyribonucleotide from N, 5-O-blocked deoxyribonucleoside was developed. The dodecamer with a Hind Ⅲ recognition site was readily synthesized from five different dimers which were prepared through the newly improved method.

• Journal of the Korean Chemical Society
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• v.30 no.1
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• pp.90-100
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• 1986

Along with synthesizing a model oligodeoxyribonuclotide GpApApTpTpCp which had the EcoRI recognition site according to "Phosphotriester Method", reported methods for protecting functions, condensation, deprotection, purifying products, quantification and identification were evaluated and modified. It was realized that oligomers were efficiently synthesized by elongating by dimer unit per step of the condensation and the condensation yields were decreased with increased numbers of the residues. The problems of quantification/identification involved in the oligonucleotide synthesis using small amount of the reactants were solved by employing UV/IR spectrophotometry and hplc/tlc. It was also proved that a nucleotide having the exposed 5'-OH function was well synthesized by condensing a 5'-OH nucleotide and a phosphodiester nucleotide whose molar ratio was intendedly made to be 1 : 1.2 and then detritylating followed by washing with an aqueous solution of sodium bicarbonate. Spectrophotometric and chromatographic data of the nucleotides and their derivatives concerned in this synthetic work were prepared.

• Journal of the Korean Chemical Society
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• v.39 no.11
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• pp.848-855
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• 1995

The influence of gravitational effect on the retention behaviors of polystyrene (PS) and polymethylmethacrylate (PMMA) in flat type thermal field flow fractionation (Thermal FFF) was studied. In the case of downward flow of mobile phase, the gravitational effect acting in the same direction of mobile phase flow increases as the angle of the system from the horizontal line (0˚to 60˚) increases. The decreasement of retention time of PS & PMMA was found. Also, the increasement of dimensionless λ values was found. And the difference in the retention time of PS & PMMA having different molecular weight decreases and also the resolution decreases. In the case of upward flow of mobile phase, the gravitational effect acting in the opposite direction of mobile phase flow increases as the angle of the system from the horizontal line (0˚to 60˚) increases. The increasement of retention time of PS & PMMA was found. Also, the decreasement of dimensionless λ values was found. And the difference in the retention time of PS & PMMA having different molecular weight increases and also the resolution increases.