실리콘 웨이퍼 공정용 알루미나 정전척의 제작과 특성에 관한 연구

천희곤,조동율,이영섭,박용균,최성호,정광진,Serguei Spoutai 울산대학교 기계부품 및 소재 특성평가연구센터 1999 연구보고서 Vol.1999 No.-

정전척의 유전체 물질로 열전도도와 유전특성 그리고 기계적 특성이 우수한 알루미나에 TiO₂첨가하여 유전체의 비저항을 변화시켜서 정전척(electrostatic chuck)에서 발생하는 정전력인 쿨롱힘(coulomb force)과 존슨-라벡힘(Johnsen-Fahbeck firce_의 영향을 규명하려 하였다. 그리고 비저항, 인가전압, 온도, 습도가 정전력에 어떠한 영향을 주는지 고찰하였으며, 인가전압에 따른 응답 특성에 관하여 고찰하였다. Alumina electrostatic chucks for silicon wafer process with wide range of electrical resistivity were fabricated by controlling the amount of TiO₂ addition (0 wt%, 1.3 wt%, 2 wt%, 2.8 wt%). The dependence of electrostatic force on applied voltage, temperature and humidity was investigated. In addition, response characteristics on applied voltage and relationship between electrical resistivity and electrostatic force characteristics such as Coulomb force and Johnsen-Rahbeck force were discussed

老朽아파트 再建築에 따른 住居環境評價에 관한 硏究

송대호,박춘근 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.1

This study is related to the rational improvement plan according to the dwelling environment estimation factors when detoriorated apartment complexes is reconstructed. The results is follows: (1) External environment in this detoriorated apartment complexes is proved generally very bad condition with physical wornout condition of the building. Especially, it is proved that parking lot and green space, dust facilities, etc are lacked commonly. (2) When we synthesize the recognition degree to the dwelling environment. it made an analysis that dwellers have been estimate the most factors at the green space and physical facilities or deterioration of the building and EV·stairway, dwellers' demands are changing to apartment complexes environment from the investment worth concept at house basis in the past. (3) As reconstructed, In preference on improvement of deteriorated apartment complex, It values middle story type above ratio of capacity increase in higher story type and higher density type. And Unit residence has to connect a green tract of land and open space. Also Convenient facilities has to expand. Finally, there is limit that estimate basic factors about dwelling environment established inclusively in this study, unsatisfying with exactly the solve of cause in the factors. So, it is required that the study (which can receive variety changing factors) is continuing for Oaccumulating this estimation data.

아파트 단위평면의 구성면적변화에 따른 거주후 평가(POE)에 관한 연구

송대호,장승재,박춘근 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2

The study is presented the model by Stepwise Multiple Regression Analysis, practiced Post Occupancy Evaluation with factor which is to be considered for the change of constituent area after grasping change of constituent area. Apartment unit plan composition is classified in private space, public space, supporting space. The results are as follows: Total constituent area ratio of the existing plan was 39.5 : 40.8 : 19.7 and dwelling consciousness one was 36.4 : 44.0 : 19.6. Compared private space with public space, public area requested increase rather than private area. The Multiple Regression formula between each factor and the constituent area is represented to by HY(Cl)=0.3118+0.52483(C2)+0.28383)C3)+0.10922(C6), but estimate ability of this formula comes into 53.3%.

老朽아파트 再建築에 따른 住居環境評價에 관한 硏究

송대호,박춘근 東亞大學校 建設技術硏究所 1997 硏究論文集 Vol.21 No.1

This study is related to the rational improvement plan according to the dwelling environment estimation factors when deteriorated apartment complexes is reconstructed. The results is follows : (1) External environment in this deteriorated apartment complexes is proved generally very bad condition with physical worn out condition of the building. Especially, it is proved that parking lot and green space, dust facilities, etc are lacked commonly. (2) When we synthesize the recognition degree to the dwelling environment. It made an analysis that dwellers have been estimate the most factors at the green space and physical facilities or deterioration of the building and EV-stairway, dwellers' demands are changing to apartment complexes environment from the investment worth concept at house basis in the past. (3) As reconstructed, in preference on improvement of deteriorated apartment complex, It values middle story type above ratio of capacity increase in higher story type and higher density type. And Unit residence has to connect a green tract of land and open space. Also convenient facilities has to expand. Finally, there is limit that estimate basic factors about dwelling environment established inclusively in this study, unsatisfying with exactly the solve of cause in the factors. So, it is required that the study (which can receive variety changing factors) is continuing for accumulating this estimation data.

아파트 單位平面의 住居規模 適正化를 위한 基礎모델에 관한 硏究 : 釜山市 國民住宅規模 아파트를 中心으로 With a National Housing-size Apartment in Pusan

송대호,정성규,박춘근 동아대학교 건설기술연구소 1996 硏究報告 Vol.20 No.1

This study is purposed to propose the basic model for calculation of the proper dwelling size, which is suitable to the conscious structure and form of the dwelling life of Korean, in planning the unit plan with a national housing-size apartment after this. It limits the factors which effect the dwelling size(Y) to general household characteristic of dweller and the activity of dwelling life. It clears the formula by regression model in the relation between these factors and dwelling size(Y). The results is follows ; 1) Y(X_(8)) = 1.55397(FF2)+1.08807(FF3)+0.62683(FF1)+18.89860, estimate ability of this formula comes into 23.6%. 2) Y(X_(8)) =0.99396(BB1)+0.43160(BB3)+0.33118(BB2)+0.34311, estimate ability of this formula comes into 28.5%. This study tries estimating the dwelling size(Y) not by the degree of satisfaction, but the aquirement marks of the exclusive dwelling-ratio in part. But the study is elementary in estimating the dwelling size(Y) and vary estimations are expected in the method of study. Thus the study is necessary to be achieved lastingly in the propriety of interpretation the value of dweller's degree of satisfaction.

Plant Regeneration and Bulblet Formation of Allium wakegi Araki

Song,Won-seob,Yang,Deok-Chun,Yoon,Jae-Ho,Ryu,Sang-Hyun 한국자원식물학회 2004 Plant Resources Vol.7 No.1

Allium wakegi was cultured shoot tip in the condition of light culture. The Allium wakegi added plant growth regulator was observed of plant regeneration and bulblet formation. Callus Induction and growing rate was the best of 78% when added alone 2,4-D 0.5mg/L. In the formation of shoot, its regeneration rate was 96% when added BA 0.5mg/L in the light culture condition. When BA 0.5mg/L and NAA 0.5mg/L mixed and BA 0.5 mg/L and NAA 1.0mg/L mixed, the rates were 99% and 97% respectively, and these conditions were suitable for forming shoot. In the formation of roots, when added NAA 2.0mg/L in the light culture condition, the regeneration rate was 90.6 % and the roots were abnormal. When added NAA 1.0mg/L, the rate was 82 % and the highest. In the formation of bulbs, when BA 05mg/L and NAA 1.0mg/L mixed, the root generantion and its size in the bulbs was the best compare to other treatment experiments.

土留構造物의 버팀과 Anchor 軸力에 關한 硏究

서정호,류제천,김송만,박춘수 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.2

When SUNEX program was used to research for design axial force of strutting and anchoring for retention. In comparing to horizontal displacement and material force calculated elasto-plastic analysis that found following conclusion. 1)Increasing the initial axial force of strutting and anchoring for the retaining wall, the effect of wall displacement control become increase. 2)In the last stage of excavation, respectively, the reaction of strut and anchor, loading the initial axial force, increase in a linear. 3)Loading the initial axial force, bending moment is inclined to reduce, but the shearing force is increase. Therefore the safety of the cross section of wall have to be a fully assessment. 4)I propose the result in this study that the design axial force of strutting is "design load×(1-a), and the design axial force of anchoring is "design load×1.5×(1+a)". From the comparative study, I proposed the Design Axial Force of strutting and anchoring for retention. However further study is needed to verify in this value using another research and actual design.

Droplet-Based Manufacturing 공정에 의해 제조된 무연 솔더볼의 제조공정 변수 연구

엄호천,조경목,송인혁,한유동 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.1

Uniform droplet of lead-free solder balls was produced by using the Droplet-Based Manufacturing(DBM) process. Compositions of solder were Sn, Sn-3.6 wt.% Ag, and Sn-3.8 wt.%Ag-0.6 wt.% Zn. Effect of parameters such as orifice size, pressure difference, and frequency on the solder ball production was also investigated. Mean size, size distribution, and surface defect of solder balls were analyzed with variations of the parameters. Droplet spacing decreased with increasing frequency and decreasing pressure difference. Thus the size of solder ball decreased with increasing frequency and decreasing pressure difference. Size distribution fell within the narrow range of ±5% from the mean diameter of solder balls. The experimentally measured diameter of the solder balls fabricated by DBM process coincided quite well with the theoretically anticipated value of d_d=A d_o^2/3.

번계전탕액 投與가 생쥐의 腫瘍致死細胞 및 抗炎症細胞의 活性度에 미치는 影響

李長泉,辛民敎,宋昊埈 圓光大學校 韓醫學硏究所 1991 원광한의학 Vol.1 No.1

This study carried out to know the effects of Tetragonia on tumor immunities and the inflammatory responses. The tumor immunities were measured by checking the antibody dependent on cellular cytotoxicity(ADCC) and natural killer(NK) cell activity. The effects of Tetragonia on inflammatory responses were measured by evaluating the amount of reactive oxygen intermediate(ROI) in the neutrophils and macrophages. The innate immunity was evaluated by measuring the phagocytic activity of macrophages. The results obtained were as follows : 1. Tetragonia increased the antigen specific ADCC without affecting antigen non specific NK cell activity in tumor immunities. 2. Tetragonia severely decreased such ROI as O^-_2 and H_2O_2 in both neutrophils and macrophages. 3. Tetragonia increased the phagocytic activity of macrophages. The results of this study suggest that tetragonia might be effective on tumor immunity and such inflammatory diseases as rheumatoid arthritis and allergic diseases.

cis-Dichlorodiammineplatinum(Ⅱ)이 발정주기에 따른 흰쥐 난관섬모 세포의 형태 및 섬모형성에 미치는 영향에 관한 전자현미경적 및 면역조직화학적 연구

김동옥,송양주,전영희,정호삼 한양대학교 의과대학 1995 한양의대 학술지 Vol.15 No.1

electron microscope for morphological changes of cytoplasmic organelles and with light microscope for detection of tubulin substances in the cytoplasm during estrous cycle. Experimental animals(weighting 200gm. female albino rats) divided into 4 groups by the estrous cycles. Ampullar oviducts of these animals were excised at each estrous cycles. The specimen was made into immunocytological reaction slides for detection of tubulin in the cytoplasm, and the other specimen were made to ultrathin section for electron microscopy. All of specimens were examined with light and electron microscope. The results obtained are as follows. 1. The tubulin substances in ciliated cells of oviducts revealed strong reactions during proestrus and estrus but weak reactions during metestus and diestrus. 2. After cis-Platin treatment, tubulin substances in the cytoplasm of oviductal ciliated cells showed weak stain reactions but at diestrus, moderate reactions were seen similar to that of the control group. 3. The cilia and basal bodies of ciliated cells of ampulla oviducts after cisplatin treatment were decreased in number at all stages of estrous cycle. 4. Ciliated cells in cis-Platin treated rat revealed hypertropies of mitochondria, atrophies of Golgi complex, decrease of polyribosomes and segmented cisternae of rough endoplasmic reticulum at proestrus, estrus and metestrus. It is consequently suggested that cis-Platin would induce inhibition of ciliogenesis in oviductal ciliated cells during estrous cycles.