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Development of a new process for the inhibition of oxidization in MgO-C refractory
Eun-Hee Kim 한양대학교 세라믹연구소 2013 Journal of Ceramic Processing Research Vol.14 No.2
Graphite, used as a carbon source in a conventional magnesia-carbon (MgO-C) refractory, was coated with an inorganic precursor to prevent the contact between graphite and oxygen. The coating layer thus generated could effectively protect graphite from oxygen, compared to common antioxidants. The coating reagent was composed of silicate and metal alkoxide, generally called the inorganic precursor, which modified the graphite surface. The modified graphite showed excellent stability at 1000 o C in an ambient atmosphere, whereas the graphite in a conventional MgO-C refractory reacted with oxygen and showed a significant weight loss. The coating reagent was coated uniformly on the graphite surface and it was very efficient in preventing the oxidation of graphite. Furthermore, the shape of prepared refractory samples remained fixed, even when the content of phenol resin was low. Consequently, ecofriendly MgO-C refractories with high oxidation resistance were successfully prepared by the coating of an inorganic precursor onto graphite.
BETTER UNDERSTANDING OF THE BIOLOGICAL EFFECTS OF RADIATION BY MICROSCOPIC APPROACHES
EUN-HEE KIM 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.7
Radiation has stochastic aspects in its generation, its choice of interaction mode during traveling in media, and its impact on living bodies. In certain circumstances, like in high dose environments resulting from low-LET radiation, the variance in its impact on a target volume is negligible. On the contrary, in low dose environments, especially when they are attributed to high-LET radiation, the impact on the target carries with it a large variance. This variation is more significant for smaller target volumes. Microdosimetric techniques, which have been developed to estimate the distribution of radiation energy deposited to cellular and subcellular-sized targets, contrast with macrodosimetric techniques which count only the average value. Since cells and DNA compounds are the critical targets in human bodies, microdosimetry, or dose estimation by microscopic approach, helps one better analyze the biological effects of radiation on the human body. By utilizing microbeam systems designed for individual cell irradiation, scientists have discovered that human cells exhibit radiosensitive reactions without being hit themselves (bystander effect). During the past 10 or more years, a new therapeutic protocol using discontinuous multiple micro-slit beams has been investigated for its clinical application. It has been suggested that the beneficial bystander effect is the essence of this protocol.
The analysis of body type of Chinese women by the age - Focusing on the Body Index -
( Eun Hee Kim ),( Hee Soon Sohn ) 한국패션비즈니스학회 2006 패션 비즈니스 Vol.10 No.3
This study aims at strengthening the national competitiveness of Korea`s clothing industry as it provides substantial information on type characteristics and body types for Chinese women and improves the fitness of clothing, considering human proportion in the production of clothing products for export to China. This study measured for 1,381 women between 19 and 50 aged residing in Beijing and Shanghai, China from June 23 to August 7, 2004 by the simple random sampling. Data was analyzed by used SPSS/WIN 10.0 Program. As for the of method of this study, the technical statistical analysis, F-test, and Duncan-test were made. The results of this study are as follows. As age increases, the shoulders seem higher with less curvature on waist, while the front has turned into the straight silhouette with the side turned into the flat silhouette without curvature, and waist and belly turn into the body type of short and thick.
Effect of Window Display Design for Flower Shop on Customers' Buying Desire
Eun-Hee Kim,Suk-Young Yun,Hong-Yul Kim 경상대학교 농업생명과학연구원 2009 농업생명과학연구 Vol.43 No.5
This study purposed to examine how the window display of flower shops affects consumers' buying desire, and for this purpose, we surveyed flower buying customers' interest in window display according to their gender, age, and occupation. The survey was conducted using a questionnaire with flower shop customers in Seoul, Daegu, and Gyeongju. Interest in window display was over 1.5 times higher in women than in men. Among criteria for choosing a flower shop, window display was more important than other factors. With regard to experience of being stopped by unique window display, many of the respondents replied that they had such an experience, and the frequency was higher among women than among men. Among different types of window display, theme-type window display was most effective in stimulating customers' curiosity and buying desire. According to occupation, housewives showed particularly high interest in window display. The results of this study show that the window display of flower shops has a significant effect on consumers' buying desire.
Mercury biogeochemical cycling and bioaccumulation in aquatic environments: A review
Eun Hee Kim 대한환경공학회 2007 대한환경공학회 학술발표논문집 Vol.2007 No.12
Over the last century the mercury (Hg) concentration in the environment has been increased by human activities with inputs from sources such as atmospheric deposition, urban runoff, and industrial effluents. Mercury can be transformed to methylmercury (MeHg) in anaerobic conditions by sulfate reducing bacteria (SRB) and sediments are the principal location for MeHg production in aquatic environments. Interest in bioaccumulation of Hg and MeHg into lower trophic levels of benthic and pelagic organisms stems from public health concerns as these organisms provide essential links for higher trophic levels of food chains such as fish and larger invertebrates. Fish consumption is the major exposure route of MeHg to humans. Recently, it was reported that blood samples in Korea showed much higher Hg levels (5?8 times) than those in USA and Germany. Although this brings much attention to Hg research in Korea, there are very few studies on Hg biogeochemical cycling and bioaccumulation in aquatic environments. Given the importance of Hg methylation and MeHg transfer through food chains in aquatic environments, it is imperative that studies should be done in much detail looking at the fate, transport, and bioaccumulation of Hg and MeHg in the environment. Moreover, there should be long?term monitoring plans in Korea to evaluate the environmental and health effects of Hg and MeHg.