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이상태(Lee, Sang-tae) 연세대학교 강진다산실학연구원 2022 다산과현대 Vol.- No.15
공재 윤두서는 이만부, 이서, 심득경, 이하곤 등과 교류하면서 그림을 그린 조선 후기 대표적인 근기남인 화가였다. 공재는 중국과 일본의 지리서적과 지도들을 많이 보고 『동국여지지도』와『일본여도』를 제작하였다. 공재가『일본여도』를 제작할 때 이용한 일본지도는『본조도감강목』이다. 이 지도는 일본의 이시카와 류센이 일본지도에 우키요에 화법을 가미하여 일본지도를 아름답게 만든 지도이다. 이 지도는 1711년의 조선통신사 일행이 도입하여 윤두서에게 전해졌고 공재는 이 지도를 보고 『일본여도』를 제작하였다. 『일본여도』는 후에 공재의 외손인 다산 정약용에게 많은 영향을 주었다. 정약용은 지구구형설을 믿었으며 이러한 원리로 지도를 제작하여야만 올바른 지도를 만들 수 있다고 강조하였다. 다산은 『성경전도』 등을 연구하였고 일본의 정세에 대해서도 많은 연구를 하였기 때문에 일본 사정도 잘 알고 있었다. 다산은 공재가 그린 『일본여도』를 보고 매우 감탄하였으며 주변 사람들에게 자랑을 하였다. 그러나 『일본여도』는 일본의 지형과 경위도를 무시하고 아름답게 평면으로 그렸기 때문에 다산이 일본의 경위도를 파악하는데 지장을 주었다. Gongjae Yoon Du-seo was a representative artist of tenacity in the late Joseon Dynasty who painted while interacting with Lee Man-bu, Lee-seo, Shim Deuk-gyeong, and Lee Ha-gon. Gongjae read a lot of geographical books and maps of China and Japan and produced 『Dongguk Yeoji-do』 and 『Japanese Yeo-do』. The Japanese map that Gongjae used to produce 『Japanese Yeo-do』 was 『Bonjo Dogamgangmok』. This map is a map that Ishikawa Ryusen of Japan made the Japanese map beautiful by adding ukiyo-e painting to the Japanese map. This map was introduced by Joseon Tongsinsa in 1711 and handed down to Yun Du-seo, and Gongjae saw this map and produced 『Japanese Yeo-do』. 『Japanese Yeo-do』 later had a great influence on Dasan Jeong Yak-yong, the grandson of Gongjae. Jeong Yak-yong believed in the theory of the sphericity of the earth and emphasized that a correct map can be made only when a map is produced according to this principle. Since Dasan studied 『The Map of Manchuria』 and a lot of research on the situation in Japan, he was well aware of the situation in Japan. Dasan admired Gongjaes 『Japanese Yeo-do』 and boasted to the people around him. However, 『Japanese Yeo-do』 made it difficult for Dasan to grasp the longitude and latitude of Japan because the map was beautifully drawn flat without considering Japans topography and longitude and latitude.
역류성(逆流性) 식도염(食道炎)에 대한 이진탕가미방(二陳湯加味方) 구성(構成) 개별(個別) 한약재의 효과(效果)
이상태,곽민아,Lee, Sang-Tae,Kwak, Min-A 대한한방내과학회 2013 大韓韓方內科學會誌 Vol.34 No.2
Objectives : The object of this study was to observe the protective effects of 8 types of individual herbal components of Yijintang-gamibang, on the reflux esophagitis (RE) in rats as compared with omeprazole. Methods : Each 100 mg/kg individual herbal component was orally pretreated, at 1 hr before and 6 hrs after pylorus and forestomach ligation, the changes on the esophageal lesion areas, gastric volumes, acid and pepsin outputs, antioxidant effects, esophageal total hexose and sialic acid contents were observed with changes on the esophageal histopathology. The results were compared with an omeprazole 10 mg/kg treated group. Results : Pylorus and forestomach ligation-induced RE were inhibited by treatment of all 8 herbal components and omeprazole except for Pinella Rhizoma and Massa Meicata Fermentata, in order of Atractylodis Rhizoma, Citri Pericarpium, omeprazole, Glycyrrhizae Radix, Hordei Fructus Germiniatus, Holelen and Citri Pericarpium, as compared with RE control. Pinella Rhizoma and Massa Meicata Fermentata did not show any favorable protective effects against RE nor antioxidant effects in the present study. Conclusions : The main active herbal components showing favorable protective effects on RE of Yijintang-gamibang mediated by antioxidant effects, were Atractylodis Rhizoma, Citri Pericarpium, Glycyrrhizae Radix, Hordei Fructus Germiniatus, Holelen and Citri Pericarpium. Furthermore Atractylodis Rhizoma and Citri Pericarpium showed more favorable protective effects as compared with omeprazole, therefore, it is expected that Atractylodis Rhizoma and Citri Pericarpium have potential as new alternatives or safe therapeutics against RE.
LTNE 모델을 이용한 다공성 채널 입구영역에서의 열전달 특성 해석
이상태,이관수,김서영,Lee, Sang-Tae,Lee, Kwan-Soo,Kim, Seo-Young 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.7
A numerical analysis has been carried out on forced convection heat transfer in the developing region of a porous channel. The channel is filled with an isotropic porous medium. At the channel walls, a uniform heat flux is given. Comprehensive numerical solutions are acquired to the Brinkman-Forchheimer extended Darcy equation and the LTNE model which does not employ the assumption of local thermal equilibrium between solid and fluid phases. Details of thermal fields in the developing region are examined over wide ranges of the thermal parameters. The numerical solutions at the fully developed region are compared with the previous analytical solutions. The correlation for predicting local Nusselt number in a porous channel is proposed.