벽식 아파트의 평면확장 리모델링을 위한 슬래브와 철골보 접합부 성능 실험

오상훈,유홍식,장인화 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

The purpose of this stud,' was to examine structural problem which occur in case of enlarging inner space and to show the solution. Shear experiment was performed to insure unification of the existing structure and steel frame in case of acting lateral force like seismic effect and wind effect. Also, bending experiment was performed to consider deformation of vertical direction due to subsidence of extension frame. Design range of connection was proposed by various test.

동전해정제시 음극분극전위에 미치는 첨가제의 영향에 관한 연구

오기식,유용주,김영홍 울산대학교 1985 연구논문집 Vol.16 No.2

전해첨가제를 동전해액(황산동-황산)에 각각 단독으로 또는 복합적으로 첨가하여 음극분극전위를 측정함으로써 다음과 같은 결론을 얻었다. 1) 첨가량이 많아짐에 따라 아교와 글리신은 음극분극전위를 현저히 높이며, 아비톤-A는 약간 증가시키고, 티오요소는 소량 첨가할 경우 감소시키나 첨가량이 많아지면 상당히 상승시킨다. 그리고 Cl?은 음극분극전위에 영향을 거의 미치지 않는다. 2) 아교를 주 첨가제로하고 티오요소 및 아비톤-A를 첨가했을 때 티오요소와 아비톤-A는 분극전위에 거의 영향을 미치지 못하고 주로 아교가 영향을 미친다. 3) 아교 5mg/l, 티오요소 3mg/1, Cl? 20mg/l를 가한 전해액을 이용한 일반적인 전해정제로 2.5A/dm²의 고전류밀도에서 평활하고 치밀한 전착면을 얻을 수 있었으며, 불순물의 제거가 가능하고 부동태현상이 발생 하지 않았다. Cathodic polarization potentials during the ectrorefining of copper have been measured under various conditions of addition agents in the copper electrolyte (CuSO₄-H₂SO₄). The results obtained are as follows. 1) The cathode polarization potential is affected by the kind of addition agents and the amount of addition to the electrolyte. Glue and glycine show remarkable increasing effects on the polarization potential, Aviton-A has a little effect. However, thiourea causes the polarization potential to increase considerably at high concentration, but showing a decreasing effect at low concentration. Chlorine has little effect on the polarization potential. 2) In the case of using the electrolyte containing glue with Aviton-A and glue with thiourea as additives, thiourea and Aviton-A have little effect on the polarization potential, while glue shows remarkable effect. 3) The electrorefining was carried out successfully using the electrolyte added glue 5mg/l, thiourea 3mg/l, and chlorine 20,g/l, with the current thiourea 3mg/l, and chlorine 20mg/l, with the current density of 2.5A/dm² for 68hrs at the pilot plant. The surface of deposit copper was smooth and its thickness was uniform, showing the purity of 99.99( copper.

전자공학교육과 실험교과내용에 관한 연구

홍봉식,김태균,오승엽,김환우,권오석 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)

The currenty offered experiment courses are completely reconsidered and reconfigured. The whole subjects are divided into 10 seperate courses, each of which should represent either basic or advanced stages of differing fields of the electronic engineering. It has been aimed that the courses form an elaborate hierachy so that they are minimally redundant but linked to one another in their fringes. Also, it has been pursued that the new courses should not fall obsolete in at last next five years exploring the maximum possibilities of the currently available equipments.

비구조화 환경의 입력영상에 대한 영역기반의 추적 방법

오홍균,손용준,장동식 한국경영과학회 2001 한국경영과학회 학술대회논문집 Vol.- No.1(3)

The main problems of computational complexity in object tracking were object definition, identification and segmentation in non-structured environments with erratic movements and object collisions. Therefore, for efficiency, we considered the object information as a region that corresponds to objects without discriminating among objects in the same frame. This paper describes the algorithm that, automatically and efficiently, recognizes and keeps tracks of interest-regions selected by a user in video or camera image sequences. The block-based feature matching method was used for region tracking. This matching process considers only dominant feature points such as corners , edges, bright and dark spots without requiring a pre-defined model of object s . Experimental results showed that matching process captured correct region successfully even when the objects undergo scaling and 3-dimensional movements in successive image sequences.

제주도 해안 육조류의 군집구조에 관한 분석

오홍식,박행신 제주대학교 환경연구소 1993 환경연구논문집 : 제주대 Vol.1 No.-

The length of shoreline of Cheju Island is about 253 Km and the geographical features of seaside can be divided into wet land, sand beach, coast cliff and rock bed. The survey was done once a month from August, 1990 to July, 1991 at eight areas which stretched for 2 Km each along the sea side. 1. The total number and species birds observed during survey period were 3,083 and 47 respectively, And the dominat species were Passer montonus, Carduelir sinica ussuiensis, Alauda arvensis in order. 2. The highest and lowest percentage of the total individual number per family among observed birds were 24.00% of Ploceidae and 0.03% of Cuculidae respectively. 3. The highest and lowest number of species per month were 25 of May and 13 of September respectively. 4. The community of birds was composed of 5 species of summer birds, 1 species of winter birds, 8 species of resident, 27 species of passage migrant and 6 species of the others. 5. The regression line between the number of individuals and species showed 5% significance and its the correlativity was very high. 6. From the result of log n+ax_(n) = b equation, the community structure of January was most simple and that of November was cimplex. The highest and lowest common Ratio by the month were January and November respectively. 7. The diversity was high throughout the two months of February and December and was low in September and October.

유기 과산화물이 Polypropylene의 유동 특성에 미치는 영향

윤홍식,최병오,조춘구 崇實大學校 1988 論文集 Vol.18 No.-

ASEA-SKF 래들용 고알루미나 내화재의 용손성향

박홍채,이윤복,양태영,장윤식,오기동 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

ASEA-SKF 래들에 사용된 고알루미나 내화물의 광물 및 화학적 변화를 화학분석, 현미결관찰, X-선회절분석으로 조사하였다. 미사용 벽돌의 주요 광물상은 α-Al₂O₃, mullite, tridymite이었다. 가동면에서 SiO₂결정상이 소실되었으며 mullite와 α-Al₂O₃가 다소 감소하였고 2FeO·SiO₂와 hercynite, FeO, Cr₂O₃상이 생성되었다. 침식율은 강종에 따라 다소간 차이가 있었으며 용강 SF-45와 60분간 반응시켰을때 SK36벽돌의 침식율은 75.9%인 반면에 SK38벽돌의 침식율은 20.47%이었다. 대부분의 용손벽돌에서 가동면으로부터 내부로 감에 따라 열적 및 화학적 스폴링으로 인하여 미세균열이 존재하였다. Mineral and chemical changes of alumina refractories used in ASEA-SKF ladle were examined by chemical analysis, microscopy and X-ray diffraction method. Main minerals in unused high alumina runner bricks were α-Al₂O₃, mullite and tridymite. In working face of high alumina runner bricks, SiO₂phase was not observed, mullite and α-Al₂O₃phases more or less decreased. On the other hand, 2FeO·SiO₂, hercynite, FeO and Cr₂O₃phases were formed. Th corrosion of high alumina runner bricks showed different behavior by using various types of iron melts. Expecially, corrosivites of SK36 bricks and SK38 bricks, which immersed in SF-45 Iron melts for 60min, were 75.9% and 20.47%, respectively. Microcracks in high alumina runner bricks increased from the working face to the inside due to thermal and chemical spalling.

Dexamethasone이 부신피질에 미치는 영향에 관한 연구

金相吾,李永浩,金源式,金弘善 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

For the morphological study of dexamethasone upon adrenal cortex, dexamethasone was injected intramuscularly into the leg of the ICR mice by the dose of 100 ㎍/day and 500 ㎍/day for 10 days, and observed the morphological changes of the adrenal cortex stained with PAS and oil red 0. The results were as followings. 1. The total thickness of the adrenal cortex of the group injected ly dose of 100 ㎍/day of dexamethasone was 73.2% of the thickness of normal group, and that of the group injected by dose of 500㎍/day of dexamethasone was 54.1% of the thickness of normal group. Decrease of total thickness of the adrenal cortex of the group injected by dexamethasone was due to decrease of the thickness of zona fasciculata. 2. The cross-sectional area of the cell of the group injected by dose of 100 ㎍/day of dexamethasone was 74.5% of the cross-sectional area of normal group, and the cross-sectional area of the group injected by dose of 500 ㎍/day of dexamethasone was 47.3% of that of normal group. But, cross-sectional area of the cell of zona glomerulosa and zona reticularis was not significantly different normal group from the injected group. 3. The lipid droplets of the zona fasciculata of normal group were round and the cross-sectional area were around the area of the cell of this layer. Those of the group injected by dose of 100㎍/day of dexamethasone decreased than normal group and the cross-sectional area of main lipid .droplets were around the area of the nucleus of the zona fasciculata cell. And those of the group injected by dose of 500㎍/day of dexamethasone were decreased than the group injected dose of 100 ㎍/day of dexamethasone and the cross-sectional area of the main lipid droplets of the group were much smaller than the nuclei of the zona fasciculata cells.

제주도산 노랑초파리(Drosophila melanogaster) 자연집단에 있어서 P-M system에 의한 Cytotype 분포

김원택,오홍식 濟州大學校 師範大學 科學敎育硏究所 1990 科學敎育 Vol.7 No.-

The frequency of the cytotype distribution of the P-M system was investigated in the natural populations of Drosophila melanogaster form 4 localities (Cheju, Sogwipo, Moseulpo, Sungsan) of Cheju-Island. The results are as follows : 1. The frequencies of M, Q, and M'(pseudo M) types are 17.95%, 33.01% and 49.04%, respectively. 2. The activities of M cytotype appered to be variable among 4 population, indicating M and Q cytotype. 3. The P factor activity for potential GD sterility is negligible in these populations.

제주도 도요목 분포에 관한 연구

강정심,오홍식,박행신 제주대학교 환경연구소 1993 환경연구논문집 : 제주대 Vol.1 No.-