우주선용 고온 절연체의 표면 코팅 재료 개발

김영채,문세기 한국결정성장학회 1995 한국결정성장학회지 Vol.5 No.4

우주 항공 기술의 첨단인 Space Shuttle Orbiter(SSO)의 두 coating material 인 Reaction Cured Glass(RCG)와 Spinel(C742)을 제조하여, 표면 위에 부딪히는 원자들의 재결합 가능성 $\gamma$를 확산반응기에서 측정하였다. SSO의 재진입 온도인 약 1000K에서 C742의 산소 원자들의 재결합 가능성 $\gamma$는 $3 {\times} 10^{-2}$으로 RCG에서의 $4 {\times} 10^{-4}$ 보다는 더 큰 값을 갖는다. C742에서 $\gamma$값이 더 높다는 것은 RCG에서 보다 더 많은 활성점을 갖고 있다는 것을 의미한다. 낮은 온도에서 활성점에 있는 원자의 탈착을 유도함으로써 보다 활성이 낮은 표면 코팅 재료를 개발할 수 있다. The recombination of oxygen and nitrogen atoms on the surfaces of two coating m materials of the Space Shuttle Orbiter (SSO), a reaction cured glass (RCG) and a spinel (C742), was investigated. The recombination probability, $\gamma$, i.e., the probability that atoms im p pinging on the surface will recombine, was measured in a diffusion reactor. Value of $\gamma$ for oxy g gen atom on C742 ($3 {\times} 10^{-2}$) was much higher than that on RCG ($4 {\times} 10^{-4}$) at the tempera t ture of SSO re-entry (ca. 1000K). The higher value of $\gamma$ on C742 indicates a higher number d density of active sites than RCG. It suggests the possibility of designing less active surfaces by i inducing the desorption at lower temperature.

論理的 思考의 性格과 評價

金濚埰 啓明大學校 행동과학연구소 1991 啓明行動科學 Vol.4 No.1

學習社會가 강조되고 있다. 지식의 양은 폭증하고 있고 개인자신이 責任지고 결정해야 하는 自由度 또한 크게 늘어나고 있는 현재이기 때문에 이 말은 더욱 무게를 가지는 것같이 보이기도한다. 思考力開發이 교육의 중요한 한가지 목표로 近來에 이르러 더욱 주목되고 있는 것도 이러한 脈絡에서 이해하고 싶다. 본고의 目的은 論理的 思考의 본질을 밝히고 이어서 그러한 思 考力을어떻게평가할 수 있는지를 살펴보는데 있다.

管理的 思考: '생각할 줄 아는 思考'의 戰略

金濚埰 啓明大學校 행동과학연구소 1991 啓明行動科學 Vol.4 No.1

초록없음

幼苗期의 植栽密度가 造林後 잣나무 苗木의 生長에 미치는 影響

金英彩 경희대학교 부설 식량자원개발연구소 1986 硏究論文集 Vol.7 No.-

This study was carried out to investigate the influence of density. The Seedlings were planted three different density(81, 144, 225 plot) The density during the seedling growth stage influenced the subsequent three growth after reforestation. 1. Three height of 144 density plot was significantly higher than that of other plots. 2. Significant differences between 144 and 81 plots were found, on height, but not recognized on diameter 3. Relationship between height, leaf growth and diameter was significantly recognized and it had a positive correlation.

光 環境要因이 잣나무 幼苗의 體內 無機養科 變化에 미치는 影響에 關한 硏究

金英彩 慶熙大學校 1988 論文集 Vol.17 No.-

Pinus Koraiensis seedlings were grown under different relative light intensity on the Seedling bed and transplanting bed to measure the change of inorganic matters by the light environmental factors. The results obtained were summarized as follows: 1. Total inorganic matters(nutriment)contents of various parts of seedlings were generally irregullar. N, P₂O_5, K₂O, CaO, MgO and Fe increased with increasing relative light intensity and decreased with decreasing relative light intensity While Mn had a tendency to be exceptional conversely. 2. In the Change of inorganic matters by the seedling organs, M, P₂O_5, K₂O, CaO and Mn were showed the highest in the leaves, MgO in the stems. Fe was the most contents rate in the roots. 3. N, P₂O and K₂O were more in one year old leaves and MgO was in the 2 year-old leaves than the other autriment, in the change of inutriment contents rate by the leaves age, CaO, Fe, Mn were the highest in the 3-year-old leaves.

幼苗期의 植栽密度가 造林後 잣나무 苗木의 生長에 미치는 影響

金英彩 慶熙大學校 1986 論文集 Vol.15 No.-

This study was carried out to investigate the influence of density. The Seedlings were planted three different density(81, 144, 225 plot). The density during the seedling growth stage influenced the subsequent three growth after reforestation. 1. Three height of 144 density plot was significantly higher than that of other plots. 2. Significant differences between 144 and 81 plots were found on height, but not recognized on diameter. 3. Relationship between height, leaf growth and diameter was significantly recognized and it had a positive correlation.

山林火災의 被害狀況과 豫防對策에 關한 硏究(1966年~1985年)

金英彩 慶熙大學校 1987 論文集 Vol.16 No.-

The purpose of this study was to set up some basical information for forest incendiary. The injury was investigated as analyzed the forest fire which had been happened from 1966 to 1985 in Korea. The results abtained are summarized as follows : 1. The forest fire broke out much less in the latter half period(1976-1985) than in the first half period(1966-1975) and the scope of injury was decreased. 2. Most of the forest fire were accidental as villager's mountain-climbing during the dry season, mountaineer's carelessness, burning up a ridge of fields, playing with fire by children and folk game with fire. 3. The forest fire mostly broke out on springtime of a year (March-May), on Sunday and Holiday and at P. M 2 : 00-6 : 00 of a'day. 4. In order to prevent the forest fire, some basic countermeasure policy should be taken. 1) A forest fire precaution week should be taken. 2) A institution for the forest fire precaution should be set up. 3) Villagers must pay special attention to the forest fire. 4) Burning up a ridge of fields must be carried out for the given period.

만성 췌장염에 동반된 비장내의 가성낭종 1 예

김영채,김건호,이원주,최진학,강재황,심대석,함종렬,이근홍 대한내과학회 1992 대한내과학회지 Vol.43 No.5

The Pseudocyst as a sequela to pancreatitis or pancreatic trauma can occur at any site in the abdomen, but its formation within the liver, kidney and spleen is a rare event. In such cases pancreatic fluid enters along the major blood vessels into the parenchyma without digesting the capsule. The complications of intrasplenic pseudocyst are spontaneous rupture, bleeding, secondary infection, splenic artery obstruction with splenic infarct and UGI bleedings due to splenic vein thrombosis. Recently, we experienced a 34-year-old man complained of epigastric and LUQ pain, which was diagnosed as intrasplenic pseudocyst associated with chronic pancreatitis confirmed by ultrasonogram of abdomen, abdominal CT and ERCP. A distal pancreatectomy with Roux-en Y pancreaticojejunostomy and splenectomy were performed, and subsidence of his symptoms was observed. We report this case with a review of relevant literature.

S 자 결장에서 방생한 원발성 편평세포암 1 예

김영채,김정열,이옥재,원용환,손미정,김경환 대한내과학회 1997 대한내과학회지 Vol.52 No.2

Primary squamous cell carcinoma of the colon is very rare and its incidence is 0.025% to 0.05% among all colon cancers. We report a case of primary squamous cell carcinoma of the sigmoid colon in a 65-year-old man. He had bowel habit change and hematochezia for 3 months. Colonoscopy with biopsy and left inguinal lymph node biopsy revealed squamous cell carcinoma. We confirmed the diagnosis of primary squamous cell carcinoma of the sigmoid colon with lymph node metastasis by diagnostic criteria. The patient was discharged against advice and expired.

식도정맥류에 대한 내시경적 결찰요법의 장기 추적관찰

김영채,이옥재,김정렬 대한소화기내시경학회 1995 Clinical Endoscopy Vol.15 No.3

Endoscopic variceal ligation is an accepted new form of safe treatment for esophageal varices. But, there are a few reports of long-term effect of EVL. We analysed 60 patients to evaluate long-term effect of EVL for esophageal varices. The eradication rate was 96.5%, the mean session for eradication of varices 3.0, the number of bands per person 21.5 and the number of bands per session 7.2, Child-Pugh classes(A: B: C) of patients were improved in 25, not changed in 30, deteriorated in 2 cases by EVL(34:19:4 at postEVL vs 20:19:21 at baseline, p$lt;0.01). No serious treatment-related complication resulted from 167 EVL sessions. The patients were followed for a mean of 10.5 months, during which recurrence rate of varices was 14.5%, rebleeding rate 16.4%, and mortality rate 12,7%. The period from last session to recurrence was 4-19 months(mean 9.6). No late complication of EVL was documented. In conclusion, EVL is a safe and effective for hemostasis and eradication of esophageal varices. Thus it can improve liver function and reduce bleeding-related mortality in patients with liver cirrhosis. But the regular periodic examination for recurrence after an eradication of varices should be required.