Kwang Hoon Chi

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The goal of this study was to elucidate whether triggering the sphingomyelin pathway modulates LPS-initiated responses. For this purpose we investigated the effects of N-acetylsphingosine (C(2)-ceramide) on LPS-induced production of NO and PGE(2) in murine RAW 264.7 macrophages and explored the signaling pathways involved. We found that within a range of(More)
In this paper, we present a neuro-fuzzy classifier derived from the generic model of a 3-layer fuzzy perceptron and implement a classification software system for land cover classification. Comparisons with the proposed and maximum-likelihood classifiers are also presented, We use the image of Daeduk Science Complex Town which is obtained by AMS (airborne(More)
Earthquake is a natural disaster which causes extensive poverty damage as well as the death of thousands and thousands of people. In this study, we tried to find the unknown characteristics of earthquakes using association rule mining methods global earthquake data occurred since 1973. As a way for mining of quantitative association rule on the earthquake(More)
In multi-dimensional image, ICA-based feature extraction algorithm, which is proposed in this paper, is for the purpose of detecting target feature about pixel assumed as a linear mixed spectrum sphere, which is consisted of each different type of material object (target feature and background feature) in spectrum sphere of reflectance of each pixel.(More)
We investigated the effect of iododeoxyuridine (IdUrd) exposure on cis-diamminedichloroplatinum (CDDP) cytotoxicity in the human bladder cancer cell line 647V. Following a 48-h incubation with 2-20 microM IdUrd, a 1-h exposure to 0-120 microM CDDP produced a dose-dependent increase in CDDP cytotoxicity as measured by clonogenic survival. IdUrd exposure of(More)
This study intended to develop a new method for the analysis and assessment of city surface temperatures (ST). Landsat data from 1994 to 2003 were used, and Daegu, Korea, was selected as the study region. Surface temperature difference(STD) distribution diagrams were prepared and verified, based on the surface temperatures of wide and flat playgrounds of(More)
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