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裵三喆 한국수산해양기술학회(구 한국어업기술학회) 1967 수산해양기술연구 Vol.3 No.1
This paper stated the variation of the hydrodynamic resistant coefficient K of hand knitting plane model net which was set perpendicularly to the flow of water. The scale of the model net was determined after Tauti's principle for similarity law and experi nent was conducted for measuring the coefficients about two cases of the nets composed of flat knot (reef knot) and trawlers knot(sheet bent). The scale of the model nets which was used in experiment were 1/10, 1/20, 1/30, 1/40, 1/50, 1/60, 1/70, 1/80, 1/90 and full scale. The result of this experiment in circulating water tank came to the conclusion that; a. The hydrodynamic coefficient of trawler knotted net showed about 0.55 higher than the flat knotted net. b. The value of K coincided approximately with the value estimated by the formulae which H. Miyamoto, M. Nomura and Y. shimozaki calculated from experiment. c. The hydrodynamic coefficient K were not varied when the scale ratio was larger than 1/50, the value of K was increased gradually from 1/60 and suddenly increased at 1/80 and 1/90. Therefore, when we design a model net it is appropriate to restrict the scale ratio to less than 1/50, under the condition that the velocity of the full scale is 1.3 knot in this experiment.
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부산, 월내간 해수의 수질조사 : 해수의 방사능을 중심으로
장지원,배삼철 한국수산학회 1968 한국수산과학회지 Vol.1 No.1
釜山, 公須, 日光, 月內의 4個 地点의 海水의 放射能을 G.M. counter에 依해서 測定하고, 그때의 水質의 다른 要因도 아울러 測定하여 이와 함께 그 變化를 比較하였다. Radioactivity는 Salinity에 比例하여 增減하였다. 그것은 鹽分속의 K와 密接한 關係가 있다고 생각된다. The distribution of the radioactivity of seawater along the coast and the adjacent sea of Korea has not been reported. Therefore it is neccessary to investigate this to give the basic data for reference in the field of the project applying atomic energy. A power plant of atomic energy projected by the government of R. O. K., and the Atomic Energy Agency has commenced to make general survey in geographical, meteorological and oceanographical aspects of proposed sites for it. It is a part of that survey in the field of the oceanographical investigation. The results of examination of sea water near those sites together with the fresh water of the rivers in those area are reported in this paper.
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