명승과 자연자원의 보호 법적인 보장과 국민의 인식을 위하여

이은상,Lee, Eun-Sang 국립문화재연구원 1969 헤리티지:역사와 과학 Vol.4 No.-

복수로 발현된 비 IgE 매개성 호산구성 위장관염 1예

이은상,김미진,하상윤,이유민,최경은,최연호,Yi, Eun-Sang,Kim, Mi-Jin,Ha, Sang-Yun,Lee, Yoo-Min,Choi, Kyong-Eun,Choe, Yon-Ho 대한소아소화기영양학회 2011 Pediatric gastroenterology, hepatology & nutrition Vol.14 No.2

저자들은 구토, 설사와 같은 비특이적인 증상과 복수가 발생한 13세 남아에서 말초혈액의 호산구 증가 소견이 있고 IgE는 정상범위이며, 내시경 생검상 식도, 소장, 대장 및 직장에서 특징적인 호산구 침윤 소견이 관찰되어 비 IgE 매개성 호산구성 위장관염으로 진단된 1예를 경험하였으며 스테로이드 투여로 증상 호전을 보였기에 문헌고찰과 함께 보고하는 바이다. Eosinophilic gastroenteritis is a rare disease occurring especially in children, and shows various nonspecific presentations with infiltration of eosinophils in the gastrointestinal organs. The pathophysiology of eosinophilic gastroenteritis is not yet clearly known, but allergic reactions are suspected to be related with the disease. Eosinophilic gastroenteritis is categorized into the mucosal, muscularis and subserosal types based on which layer of the intestinal wall is involved. There are different clinical manifestations according to the involved layer. Most cases to date have responded well to steroid therapy. In this study, we diagnosed and treated a case of non-IgE-mediated, subserosal eosinophilic gastroenteritis in a child with abdominal pain, diarrhea and ascites.

적절한 정맥 재혈류 시점의 판단을 위한 조직산소분압의 유효성

이은상,정종필,박승하,이병일,Lee, Eun-Sang,Choung, Jong-Pil,Park, Seung-Ha,Lee, Byung-Il 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: The purpose of this study is to delineate the optimal time of venous revascularization for preventing the flap necrosis due to venous occlusion, and to clarify the usefulness of tissue oxygen pressure ($TcpO_2$) in the determination of the point of time for venous revascularization. Methods: Thirty-six, $3{\times}3\;cm$ sized epigastric island flap was elevated in left abdomen of male Sprague-Dawley rat weighing 250 gram. Flaps were randomly assigned to six groups of six flaps according to the duration of venous occlusion with microvascular clamp; 10 minutes in the group I as the control, 60 minutes in the group II, 2 hours in the group III, 3 hours in the group IV, 4 hours in the group V, and 6 hours in the group VI, respectively. Just before removal of clamp after flap was reposed in situ, the ratio of $TcpO_2$ (tissue oxygen pressure) of the island flap to that of right abdomen was calculated in each group, and tissue specimen was harvested from the distal area of the flap for histological evaluation of vascular change. Five days later, survival area of the flap was estimated, and evaluated the correlation between the tissue oxygen pressure and the rate of flap survival. Results: The $TcpO_2$ and the survival rate of flap were decreased proportionally with the duration of venous occlusion. The ratio of the $TcpO_2$ of the flap is decreased abruptly to below sixty percentile compared to the $TcpO_2$ of normal tissue, and the survived area of the flap is decreased to nine-tenth of the designed size after three hours of total venous occlusion. Histologically, the number of congested vessels was increased according to venous occluded time, and proportionally increased after 3-hours of occlusion significantly. Conclusion: There is a close correlation between the $TcpO_2$ and the survival rate of flaps according to the duration of venous occlusion. Therefore, the $TcpO_2$ represents the hemodynamic changes within the flap, and thought to be an alternative effective tool in the flap monitoring for venous revascularization.

창상치유목적의 골수기질세포 동종이식을 위한 고분자막의 조건

이은상,김명주,한승규,홍성택,김우경,Lee, Eun-Sang,Kim, Myeong-Joo,Han, Seung-Kyu,Hong, Sung-Taek,Kim, Woo-Kyung 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: Major drawbacks of conventional bone marrow stromal cells (BSCs) transplantation method are mainly caused by direct transplanted cell to host cell interactions. We hypothesized that separation of the transplanted cells by a microporous membrane might inhibit most of the potential adverse effects and induce superior effect. The purpose of the study is to determine the optimal condition of the microporous membrane. Methods: First, BSCs were placed in polyethylene terephthalate (PET) transwell inserts with 3, 8, or $12{\mu}m$ pore size, and cultured in 24 well culture plates. After 5 days, bottoms of the plates were observed for presence of attached BSCs in monolayer and cell numbers were evaluated. Second, BSCs were placed PET, polycarbonate (PCT), and mixed cellulose esters (MCE) transwell inserts with 3 and $8{\mu}m$ pore size, and cultured in 24 well culture plates. After 3 days, the supernatants of the media left in culture plate were analyzed for collagen, vascular endothelial growth factor (VEGF), platelet derived growth factor BB (PDGF-BB), and basic fibroblast growth factor (bFGF). Third, BSCs were placed in 15% and 70% of the PET membrane with $3{\mu}m$ pore size. All the experimental conditions and methods were same as the second study. Results: The optimal pore sizes to prevent BSC leakage were $3{\mu}m$ and $8{\mu}m$. The amounts of type I collagen and three growth factors tested did not show significant differences among PET, PCT, and MCE groups. However, the collagen, VEGF, and bFGF levels were much higher in the high (70%) density group than in the low (15%) density group. Conclusion: This study revealed that the optimal pore size of membrane to prevent direct BSC to recipient cell contact is in between $3{\mu}m$ and $8{\mu}m$. Membrane materials and pore sizes do not influence the collagen and growth factor passage through the membrane. The most striking factor for collagen and growth factor transport is pore density of the membrane.

최적 연속 전해드레싱에 의한 연삭기구의 규명에 관한 연구

이은상,김정두,Lee, Eun-Sang,Kim, Jeong-Du 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.8

In recent years, grinding techniques for precision machining of brittle materials used in electric, optical and magnetic parts have been improved by using superabrasive wheel and precision grinding machine. The completion of optimum dressing of superabrasive wheel makes possible the effective precision grinding of brittle materials. However, the present dressing system cannot have control of optimum dressing of the superabrasive wheel. In this study, a new system and the grinding mechanism of optimum in-process electrolytic dressing were proposed. This system can carry out optimum in-process dressing of superabrasive wheel, and give very effective control according to unstable current and gap increase. Therefore, the optimum in-process electrolytic dressing is a good method to obtain the efficiency and mirror-like grinding of brittle materials.

청일전쟁 이후 ‘청국차관’(淸國借款) 상환 안건 연구

이은상(Lee Eun-sang) 중국근현대사학회 2020 중국근현대사연구 Vol.88 No.-

This paper examines the issue of repayment of Chinese loans to Chosun Dynasty and its meaning. Firstly, I review at three loans provided by Qing Dynasty to Chosun Dynasty: The loan of China Merchants Steam Navigation Company(CMC), The loan of Imperial Chinese Telegraph Administration (ITA), The loan of Tong Shun Tai. Secondly, I analyse the process of solving the issue of Ma Ting-liang, Consul General of Late Qing Dynasty in Korea. Even after the Sino-Japanese war, this issue could not be solved, but came to a new phase when he was dispatched to Korea. At that time, the Japanese Resident-General was promoting the Korean government"s financial arrangements. He took advantage of this situation and requested the Resident-General to resolve the loan issue. Eventually, after consultation with him and the Resident-General, the Korean government paid 350,000 Japanese won in repayment to Qing Dynasty, and the loan problem was solved. Finally, I examine the meaning of resolution of the loan issue. After the war, Japan promoted the policy of providing a loan to Chosun, that was closely related to the Chinese loans. The Korean government was also aware of this situation, but the loan was not repaid because of the political change. In the process of controlling the Korean customs and transferring its income to the national treasury, the Resident-General needed to repay the Chinese loans. Ma Ting-liang have pinpointed this situation and achieved results by proactively raising the “forgotten” issue to Resident-General.

라즈베리파이와 디스플레이 장치를 활용한 교구 개발 사례

이은상(Lee eun-sang) 한국콘텐츠학회 2022 한국콘텐츠학회 종합학술대회 논문집 Vol.2022 No.7

중학생의 기술 경험과 기술 교과 흥미가 공학 진로 지향에 미치는 영향

이은상(Lee Eun Sang) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.5

이 연구의 목적은 중학생의 기술 경험, 기술 교과 흥미, 공학 진로 지향 간의 관계를 알아보고, 기술 경험과 기술 교과 흥미가 공학 진로 지향에 미치는 영향을 검증하는데 있다. 연구 대상은 경기, 충남, 충북 지역의 중학생을 대상으로 하였으며, 불성실하게 응답한 28부를 제외한 총 421부를 SPSS 21.0을 이용하여 통계처리 하였다. 연구의 결과는 첫째, 기술 경험과 기술 교과 흥미 및 공학 진로 지향 간에 높은 정적 상관이 있는 것으로 나타났으며, 기술 경험과 기술 교과 흥미의 하위 요인도 공학 진로 지향의 하위 요인과 정적 상관이 있는 것으로 나타났다. 둘째, 기술 경험과 기술 교과 흥미가 공학 진로 지향에 유의미한 영향을 미치는 것으로 나타났으며, 구체적으로 기술 교과 흥미의 하위 요인인 기술 교과 내용 관심과 기술 교과 가치가 영향을 미치는 것으로 나타났다. 이러한 결과는 중학생이 공학에 대한 진로를 좀 더 지향하기 위해서 기술 교과 내용 관심과 기술 교과 가치에 더 많은 비중을 두어야함을 의미한다. 또한 중학생의 기술 교과 내용 관심과 기술 교과 가치는 교육을 통해 향상될 수 있으므로 중학교에서 이들의 향상을 위한 교육 활동이나 교육 프로그램이 제공되어야 함을 시사한다. The purpose of this study was to analyze the relations among technology experience, interest on technology, orientation on engineering career, to investigate the effects of technology experience, interest on technology subject and orientation on engineering career. The subjects for this study were 421 middle school students in Gyeonggi, Chungnam and Chungbuk province. The results of this study were as follows; First, the total score of technology experience, interest on technology subject showed a significant correlation with orientation on engineering career. Also the sub-factors of technology experience and interest on technology subject showed a significant correlation with sub-factors of orientation on engineering career. Second, technology experience and interest on technology subject showed a significant effects with orientation on engineering career. Concretely, among the sub-factors of interest on technology subject contents and value on technology subject showed effective on their orientation on engineering career. This result shows that is important to raise interest on technology subject contents and value on technology subject because they enhance their orientation on engineering career. Also, middle school student s interest on technology subject contents and value on technology subject could be improved through their educations. Therefore it shows that middle school student education institutes have to offer education activities and program for improvement of student’s interest on technology subject contents and value on technology subject.

실물을 활용한 발명 특허 교육 프로그램 개발 및 적용

이은상(Lee eun-sang) 한국콘텐츠학회 2022 한국콘텐츠학회 종합학술대회 논문집 Vol.2022 No.7

▣ 일반 논문 : 중일전쟁(中日戰爭) 이전 시기(1912∼1936) 조선의 원산화교(元山華僑)

이은상 ( Eun Sang Lee ) 성균관대학교 인문학연구원(성균관대학교 인문과학연구소) 2016 人文科學 Vol.0 No.60

본고는 기존 화교사에서 다루지 않았던 20세기 전반 조선 북부화교, 그 중에서 중일전쟁 이전 원산화교에 초점을 맞추어 논의를 진행하였다. 그 의미는 다음 두가지로 정리할 수 있다. 우선, 지역적으로 원산에 주목함으로써 조선화교사의 연구범위를 확장하였다. 원산은 청일전쟁, 러일전쟁을 거치면서 일본의 군사기지 역할을하였고, 20세기 초 경원철도를 시작으로 육상과 해상교통이 발달하면서도시로서 면모를 갖추게 되었다. 그러나 1930년대 들어와 함경북도의 청진 등에 밀려 공업 발전이 진행되지 못했다. 이러한 원산의 도시로서의특성은 원산화교의 규모와 직업별 구성에도 반영되었다. 원산화교는 청말(淸末)까지만해도 200명 정도에 불과하였지만 경원철도의 개통이후 점차 증가하여 1930년에는 1,186명으로 늘어나 전성기를 맞이하였다. 그러나 1931년 배화폭동(排華暴動) 이후 원산화교의 대표자라고 할 수 있는화교직물도매상이 거의 몰락하고 남은 직물잡화상의 규모 역시 크게 축소되었다. 또한 화교농민이 늘어나 1934년 말에는 화교상인과 비슷한 규모가 되었다. 반면 공업도시로서의 위상이 미약하여 화교노동자의 비중은 크지 않았다. 두 번째로 『주조선사관당』(駐朝鮮使館당)에 수록된 자료를 중심으로원산화교의 네트워크를 원산부영사관, 원산중화상회를 중심으로 검토하였다. 지역별로 중화상회의 전신(前身) 중화회관(中華會館)의 역할 등에관해서는 자료의 한계로 연구가 진행되지 못했지만, 원산의 경우 중화회관의 장정(章程)을 통해 그 역할을 분명히 하고 동사(董事)를 포함한 회원을 분석하였다. 중화회관은 상무총회(商務總會)를 거쳐 1916년 12월 상회법(商會法)에 따라 중화상회로 개조되었는데, 1917년, 1928년 중화상회직원의 명단을 통해 화교상인의 출신지, 직업 상황을 검토하였다. 이들은 원산화교의 대표자로 부영사관 인사, 부영사관 존폐 문제 등에 적극참여하였다. This paper has examined the discussions on the overseas Chinese in the northern region of the colonial Korea in the early 20th century, with much focus on those in Wonsan before the Sino-Japanese War (1912∼1936). First, this study reviewed the status of port opening in Wonsan. Second, it discussed the scale and the occupational status of the overseas Chinese in Wonsan. Especially, it focused on the situation of the overseas Chinese before and after the anti-Chinese riots of 1931. Third, it analyzed the network of the overseas Chinese in Wonsan with regard to its relationship with the Wonsan vice consulate and the Chinese Chamber of Commerce in Wonsan. In addition, this study described the Chinese Association, the predecessor organization of the Chinese Chamber of Commerce in Wonsan.