鮟鱇網 漁具漁法의 改良에 關한 硏究 Ⅴ : 展開帆의 性能

洪聖根,宋之浩,趙鳳坤,朴鍾洙 군산대학교 1981 群山水産專門大學 硏究報告 Vol.15 No.1

We have been developed improved stow net and operated with it in the field. In order to study on the efficiency of otter sail of the improved stow net, we made a model experiment in a circular water tank. The findings are as follows. 1.In proportion to increase water velocity, the height of canvas o.s get lower, the decided fromula is obtained as h(%) = 77.7v-0.087 2.Resistance of otter sail is higher than board type. The hydrodynamic pressure is not perpendicular to the o.s, but inclination backward. 3.The decided formula of developing force, and resistance of otter sail is obtained as table 3. 4.Developing force is 15 to 25% of all resistance of fishing gear, resistance of otter sail is 12-18% and hydrodynamic efficiency is about 1.35. 5.Center of hydrodynamic pressure is 0.38 from the fore edge of otter sail and it may use Helmholtz's formula as it is. 6.The most effective angle of attack is about 26˚, the shearing coefficient at the time is 0.7 and the drag coefficient is 0.5. 7.To increase or decrease the buoyancy and weight of otter sail have not influenced distinctly. 8.Aspect ratio is the most effective in 2.5. 9.The joining position of fore bridles have not influenced on the efficiency of otter sail.

구리-니켈 박막의 열전능 특성

朴奉斗,韓聖愚,尹志洪 慶北大學校 産業開發硏究所 1979 硏究報告 Vol.7 No.-

Cu-Ni thin films deposited on the glass by the vacuum evaporation method containing various concentrations of Cu have been studied its thermoelectricpower and electromotive force in the temperature range of 25―220℃. The thermoelectromotive force of pure Ni depends on the thickness of films to 1800, A° but Cu_0.8 Ni_0.2 to 1600A°. Cu―Ni films containing 15,20,25% of Cu were observed the effect of magnetic disorder. The variation of thermoelectricpower appeared in variious concentrations of Cu, its maximum value is 40μV in 45% of Cu. The linear dependence of thermoelectricpower on the temperature showed from 50% to 90% at concentration of Cu.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

Water Dropper의 靜電氣特性

朴奉斗,尹志洪,韓聖愚 경북대학교 과학교육연구소 1978 科學敎育硏究誌 Vol.2 No.-

Quantitative analysis of the static electricity charged on the water dropper has been performed with an electrometer and recorder. Experiments were carried out over various parameters such as nozzle diameter, water pressure, different kinds of liquids and temperature with time. The accumulated charge on the cans of the water dropper was related to the size of nozzle outlet and hydrostatic pressure, but were independent of the temperature of liquids. There was no charge, of course, on the nonpolarized molecules such as C_6H_6, CCl_4, and kerosen fuel.

공급 사슬 환경에서의 고객주문만족 시스템

장지홍,정호상,정봉주 연세대학교 산업기술연구소 2000 논문집 Vol.32 No.2

기업의 틀을 뛰어넘어 고객과 공급자까지 자사를 중심으로 통합하는 공급 사슬 환경에 있어서 고객 만족 수준을 향상시키는 것은 매우 중요하다. 고객 만족 수준을 높이기 위해서는 우선 정확한 수요예측을 통하여 주문에 대비해야 하며, 주문이 들어올 경우 고객에게 정확한 납기회신을 제공해야 한다. 물류, 정보, 자금 등의 흐름을 총괄하는 공급 사슬 환경의 특성상, 정확한 수요예측과 납기회신을 제공하기 위해서는 제품의 공급자, 고객을 포함한 공급 사슬내의 여러 파트너 들에 대한 종합적인 고려가 이루어져야 한다. 본 연구에서는 일반적인 공급 사슬 환경에서 사용 가능한 수요계획 시스템을 구축하는데 필요한 모델과, 고객의 주문에 대한 납기 제시를 위한 납기회신 알고리듬을 제시하고자 한다. : 공급사슬관리, 수요계획, 납기회신

Zn-Sb 薄膜의 熱電能特性

朴奉斗,尹志洪 경북대학교 과학교육연구소 1980 科學敎育硏究誌 Vol.4 No.-

An investigation of the thermoelectric power of ZnSb and its thin films has been made in the temperature range between 300˚K and about 800˚K. The general method of measure ment is the determination, through thermocouple readings, of the ration ΔE/ΔT, where ΔE is the thermal emf measured between two points in the sample having a temperature difference ΔT. The thermoelectric power is varied with the temperature of the sample. The thermoelectric power of the ZnSb thin film has maxinum value at 600˚K.

Photoacoustic Effects on Material-coated window

朴奉斗,尹志洪,韓聖愚 慶北大學校 産業開發硏究所 1979 硏究報告 Vol.7 No.-

Photoacoustic effect was studied with the air cell and tungsten lamp. The air cell had a material-coated window. As the coating material, one of the following materials was used; the lamp black, copper, nickel and aluminum. The incident light was chopped by the rotating disc, and entered through the material-coated window. The produced photoacoustic signal intensity is approximately inversely proportional to the chopping frequency. This effect was the same as that when the chopped light entered into the air cell from the opposite side, gas side. The signal intensity, however, was much smaller than that of tho light incident from the oppsite side. The photoacoustic signal intensity was varied with the thickness and kinds of coated material. In the case of aluminum the intensity was rapidly decreased when thickness increased. In the case of copper, however, the intensity was increased until the thickness increased to a certain value, and over this value the intensity was decreased slowly.

쪽거리 차원을 통한 다공질규소의 미세구조 분석

김영유,홍사용,이춘우,류지욱,이기환,최봉수 대전산업대학교 반도체기술연구소 1999 半導體技術硏究所報 Vol.1 No.-

p형 단결정 규소 웨이퍼를 불화수소 용액속에서 전류밀도와 양극반응 시간을 변화시켜 다공질규소를 제작하고, 그 질량을 측정한 후 이 값으로부터 다공도와 쪽거리(fractal)차원을 계산하였다. 그 결과 양극반응 시간이 일정한 경우 다공도는 전류밀도에 비례하였다. 그리고 전류밀도가 일정한 경우 여러 양극반응 시간의 데이터로부터 얻은 쪽거리 차원은 일정하였다. 또한 쪽거리 차원은 불화수소의 농도 증가에 따라 감소하였다. 이같은 실험 결과를 퍼짐한계침전(diffusion limited deposition) 모형으로 계산된 2차원 컴퓨터 시늉내기(simulation) 결과와 비교 분석하였다. 시늉내기 결과 다공도는 퍼짐거리에 비례하였으며, 쪽거리 차원은 퍼짐거리와 반비례하였다. 이때 퍼짐거리는 전류밀도에 비례하고 불화수소의 농도에 반비례하는 물리량이므로 정성적으로 실험 결과와 일치하였다. 그러나 쪽거리 차원이 증가함에 따라 다공도가 감소되는 결과는 실험결과와 상반되었다. Porous silicon layers were fabricated with various conditions of HF concentration and current density. And their masses were measured. From these data, the porosity and fractal dimension were estimated and analyzed. We found that the porosity was proportional to the current density when the anodic reaction time was fixed and the constant values of fractal dimension could be estimated from a series of data with fixed HF concentration. The values of fractal dimension were decreased with increasing HF concentration. The obtained porosity and fractal dimension were compared with the 2-dimensional computer simulation based on diffusion limited deposition model. According to the simulation, the porosity was proportional to the diffusion length and the fractal dimension was inversely proportional to the diffusion length. Since, the diffusion length is proportional to current density and inversely proportional to base concentration, our experimental data qualitatively agreed with the results from the simulation. The porosity obtained by experiments, however, was not consistent with the results by simulation.

한국 진도개와 삽사리 혈액 단백질의 비교연구 : Ⅱ. 혈청 Lactate Dehydrogenase와 혈청 Alkaline Phosphatase의 동위효소와 활성도 Ⅱ. Isozymes and Activities of Serum Lactate Dehydrogenase and Serum Alkaline Phosphatase

김종봉,윤인숙,옥현숙,탁영빈,하지홍 대구효성가톨릭대학교 자연과학연구소 1992 基礎科學硏究論集 Vol.1992 No.1

진도개와 삽사리 혈청 lactate dehydrogenase와 혈청 alkaline phosphatase의 동위효소 및 효소활성도를 분석하였다. 전기영동결과 진도개와 삽사리의 혈청에서는 5가지 종류의 LDH의 동위효소가 모두 확인되었다. LDH의 활성도는 진돗개의 경우 522.53 ± 279.96(U/L)이었고 삽사리는 534.10 ± 280.35(U/L)이었다. 진도개와 삽사리의 혈청 alkaline phosphatase전기영동상에서는 한 종류의 동위효소만 관찰되었고 활성도는 진도개의 경우 7.61 ± 4.52(K-A unit)였고 삽사리는 10.46 ± 7.10(K-A unit)였다. 삽사리의 ALP 활성도는 연령에 따라 커다란 차이를 나타내었다. Isozymes and activities of serum lactate dehydrogenase and serum alkaline phosphatase were examined in Korean Jindo dog and Sapsaree. The electrophoretic pattern of serum lactate dehydrogenase showed five isozymes. The activities of serum lactate dehydrogenase were 522.53 ± 279.96 and 534.10 ± 280.35(U/L) in Jindo dog and Sapsaree. One kind of isozymes was observed in electrophoretic phenotypes of serum alkaline phosphatase. The activities of serum alkaline phosphatase were 7.61 ± 4.52 and 10.46 ± 7.10 (K-A unit) in Jindo dog and Sapsaree. A significant difference of alkaline phosphatase was observed according to the age in Sapsaree.

鮟鱇網 漁具 漁法의 改良에 관한 硏究(Ⅱ) : 展開帆을 이용한 改良漁具 試驗(豫報)

李吉來,宋之浩,朴鍾洙,徐萬錫,趙鳳坤,朴正鎬,洪聖根,鄭公炘,裵錫悌,鄭與基,金鎭乾 군산대학교 1980 群山水産專門大學 硏究報告 Vol.14 No.1

Ordinarily stow net fisheries was used by floater beam and sinker beam for the purpose of spreading the mouth of net. But it was not only iuconvenient and dangerous but much defective. In this thesis, we have studied fundermental experiment of the improved stow net fishing gear using head rope, ground rope and otter sail instead of floater beam and sinker beam. From the result of this experiment, it has been succeeded for fishing work to achieve basically without any difficulty. The results obtained in this study were as follows. 1) The resistance of fishing gear was estimated R≒7V2 as possible as it is taken greatly. (R: Resistance V: the rate of current) 2) The interval of otter sail was spreaded smoothly. Being in normal condition, it was maintamed the width 37-38m. It was heared comparison with net mouth of ordinary gear, and the shearing force was enough. 3) The height of mouth was lower than we have anticipated to and seemed to have the supplement of buoyancy. But according to increasing the rate of current, the lowness of mouth height was little affected. 4) The height of otter sail was decreased at the rate of 30% by the rate of current, on the contrary, the height of wing was not decreased owing to sufficient buoyancy, 5) The adjustment of extention length of hanging wire(connected with fishing boat) and raising wire(with otter sail) was great important problem and it must be dealed with the most moderatly because of a corelation between the spreading of fishing gear and catching ability. 6) On the depth of 30m, it was taken 25 minuits to cast anchor and lines, 20 min cast net, 24 min haul net, 45 min haul lines and heave anchor, respectively. 7) The improved stow net with otter sail was cleared up the defects and difficult problems in ordinary gear using floater beam and sinker beam, and it have more advantages of fishing work than ordinary one. But there were involved in lots of problems in details to solve in the future.