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유기형,조동우,유지용,이진영,이상엽 대한건축학회 2004 대한건축학회논문집 Vol.20 No.5
The purpose of this study was to evaluate the indoor environment of office building with underfloor air distribution system and ceiling based air conditioning system. The underfloor air distribution system was introduced to use access floor and aim to economical motive such as reducing floor to height level. Researches were not sufficient to preserve the characteristics between ceiling based air conditioning system and underfloor air distribution system. Experiments have been carried out to indoor environment in the summer and winter. As the result, thermal environment of the underfloor air distribution system is better than ceiling based air conditioning system in the winter. Ventilation effectiveness of the underfloor air distribution system is bigger than ceiling based air conditioning system.
정대일,김성엽,이도훈,이용균,박유미,최순규,김동현 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
Photocatalyzed degradation of acetylene gas was carried out over precoated titanium dioxide(anatase) illuminated UV light in a flow reactor. photocatalytic oxidation of acetylene gas indicated high conversion rates (78.0%) to CO₂gas. And photocatalytic oxidation of gas according to a fold, twofold, and threefold of titanium dioxide(anatase) respectively gave high conversion rates. The longer reaction time was, the higher conversion rate to CO₂ gas showed.
( Dong Hun Kim ),( Dong Hyun Choi ),( Hyun Wook Kim ),( Seo Won Choi ),( Bo Bae Kim ),( Joong Wha Chung ),( Young Youp Koh ),( Kyong Sig Chang ),( Soon Pyo Hong ) 대한내과학회 2014 The Korean Journal of Internal Medicine Vol.29 No.4
Background/Aims: The aim of the present study was to evaluate the relationship between thyroid hormone levels and infarct severity in patients with ST-elevation myocardial infarction (STEMI). Methods: We retrospectively reviewed thyroid hormone levels, infarct severity, and the extent of transmurality in 40 STEMI patients evaluated via contrast-enhanced cardiac magnetic resonance imaging. Results: The high triiodothyronine (T3) group (≥ 68.3 ng/dL) exhibited a significantly higher extent of transmural involvement (late transmural enhancement > 75% after administration of gadolinium contrast agent) than did the low T3 group (60% vs. 15%; p = 0.003). However, no significant difference was evident between the high- and low-thyroid-stimulating hormone/free thyroxine (FT4) groups. When the T3 cutoff level was set to 68.3 ng/dL using a receiver operating characteristic curve, the sensitivity was 80% and the specificity 68% in terms of differentiating between those with and without transmural involvement. Upon logistic regression analysis, high T3 level was an independent predictor of transmural involvement after adjustment for the presence of diabetes mellitus (DM) and the use of glycoprotein IIb/IIIa inhibitors (odds ratio, 40.62; 95% confidence interval, 3.29 to 502; p = 0.004). Conclusions: The T3 level predicted transmural involvement that was independent of glycoprotein IIb/IIIa inhibitor use and DM positivity.
EQUIVARIANT ALGEBRAIC APPROXIMATIONS OF G MAPS
Suh, Dong-Youp Korean Mathematical Society 1995 대한수학회논문집 Vol.10 No.4
Let f be a smooth G map from a nonsingular real algebraic G variety to an equivariant Grassmann variety. We use some G vector bundle theory to find a necessary and sufficient condition to approximate f by an entire rational G map. As an application we algebraically approximate a smooth G map between G spheres when G is an abelian group.
Homotopical triviality of entire rational maps to even dimensional spheres
Suh, Dong-Youp Korean Mathematical Society 1996 대한수학회논문집 Vol.11 No.3
Let $G = Z_2$. Let X be any compact connected orientable nonsingular real algebraic variety of dim X = k = odd with the trivial G action, and let Y be the unit sphere $S^{2n-k}$ with the antipodal action of G. Then we prove that any G invariant entire rational map $f : x \times Y \to S^{2n}$ is G homotopically trivial. We apply this result to prove that any entire rational map $g : X \times RP^{2n-k} \to S^{2n}$ is homotopically trivial.
QUOTIENTS OF REAL ALGEBRAIC G VARIETIES AND ALGEBRAIC REALIZATION PROBLEMS
SUN, DONG YOUP 경북대학교 위상수학 기하학연구센터 1995 硏究論文集 Vol.4 No.-
Let G be a compact Lie group and H an odd order group. We show that a real algebraic G×H variety X induces a real algebraic G variety structure on the quotient space X/H. We then apply the result to actions with one orbit type to solve algebraic realization problems for both G manifolds and G vector bundles.
Equivariant vector bundle structures on real line bundles
Shu, Dong-Youp Korean Mathematical Society 1996 대한수학회논문집 Vol.11 No.1
Let G be a topological group and X a G space. For a given nonequivariant vector bundle over X there does not always exist a G equivariant vector bundle structure. In this paper we find some sufficient conditions for nonequivariant real line bundles to have G equivariant vector bundle structures.