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수도(水稻)의 동피해(銅被害)에 대한 물관리 및 석회물질의 효과
김만수,한기학,김복영,이민효,김규식 한국환경농학회 1985 한국환경농학회지 Vol.4 No.2
水稻에 對하여 土壤에서 銅의 濃度를 달리하고 改良劑로서 無施用 消石炭(中和量+㎏/10a) 및 硅炭石(200 ㎏/10a)을 施用한 後에 間斷灌水와 常時湛水로 調節하여 pot 試驗한 結果는 다음과 같다. 1) 收量은 銅 處理濃度가 높을수록 減收되었으며 有意性있는 土壤中 減收濃度는 間斷灌水 : 133.1 ppm 常時湛水 : 136.8 ppm이었다. 2) 銅 200 ppm인 土壤에서 消石炭 施用으로 26∼30% 硅炭石 施用으로 27∼48% 增收되었고 常時湛水하므로 間斷灌水보다 增水되었다. 3) 銅 含量이 높을수록 收量 構成要素中 株當 總數登熱率 및 千粒重이 減少되고 消石炭 및 硅炭石施用으로 穗數와 粒數가 적었다. 4) 銅 含量이 높을수록 玄米 및 莖葉中의 銅 含量이 增加되고 常時湛水 및 消石炭 施用으로 그 含量이 적어졌다. 5) 土壤中 Cu/Ca+Mg 當量比가 增加할수록 莖葉中 銅 含量이 높았다. 6) 石炭物質 施用으로 土壤 pH는 消石炭>硅炭石>無施用 順이었다. 7) 試驗土壤中 銅 含量은 常時湛水가 間斷灌水보다 높았다. A pot experiment was conducted to find out the effects of water management, slaked lime and wollastonite on growth and Cu uptake of rice at Cu added soil. The soil was adjusted to 0, 50, 100 and 200 ppm concentration of Cu. The application amount of slaked lime was the lime requirement plus 150 ㎏/l0a and wollastonite 200 ㎏/10a, respectively. The copper concentration in soil which reduced yield significantly was 133.1 ppm for submersion and 136.8 ppm for intermittent irrigation. The application of lime and wollastonite reduced Cu content in brown rice as well as increased rice yields compared to that of no lime. The copper content in plant was increased with increasing soil Cu concentration, however, reduced with submersion and application of slaked lime, and increased with increasing the ratio of Cu/Ca+Mg equivalent in soil.
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金萬守 제주대학교 1988 논문집 Vol.26 No.-
용강으로부터 박판을 직접 제조하는 쌍롤식 박판제조 공장에 있어서 로울러의 회전수 및 로우러간의 간격이 미치는 영향을 실험적으로 조사하여 다음과 같은 결론을 얻었다. 1) 로우러 회전수 및 로울러 간격의 적정화에 의해서 표면 상태가 양호한 연속적인 박판을 얻었다. 2) 로울러 두께 방향에 있어서 열팽창 및 압하력이 급냉 시료의 두께 변화에 큰 영향을 주었다. In this paper th esolidification phenomena at the molten pool has been modeled and simulated the one dimesional unsteady-state heat transfer of the solid and molted phase and the pressure distribution in the solid phase for the twin-rooll continuous casting of Sn-15% Pb. The roll spacing and angular velocity of the rolls are considered to be main variables operating proess. Results of the experiment using Sn-15% Pb are compared with model predicitons.
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김만수 東新大學校 工業技術硏究所 1998 工業技術硏究 Vol.4 No.-
Tae-young Company has been enforced to enhance the cutting system in an extruding molding process. This company has wasted the resources such as money, machines and workers because just-cutting system is not established. Moreover, noises and dusts are broken out whenever the cutting work is operated and the exposure of a cutter blade to the workers is dangerous, too. Therefore, we improved the cutting system to make the just-cutting possible and developed a dust - diminishable cover in order to eliminate dusts effectively.
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金萬洙 東新工科大學 1988 論文集 Vol.1 No.-
Lot size planning concerns the amounts and timing of production orders so that the combined setup and inventory holding costs are minimized. When production capacity is limited, the lot size problem becomes complex. This paper discusses the Modified Economic Order Quantity (MEOQ) approches which takes the advantages of EOQ and Wagner-Whitin rules. In this proposed MEOQ model, we develope a heuristic procedure of solving the discrete demand, limited capacity lot size problem.
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김만수,김우열 東新大學校 工業技術硏究所 1997 工業技術硏究 Vol.3 No.-
A lot of company have depended of an empirical method in facility layout planning. This method give rise a loss of handling and space reduction of productivity to a company, especially a mould manufacturing factory which thers is a lot of facilities such as lath, press milling. In this paper we analyze the current facility layout in Sehwa Machine Co. Ltd. and suggest an effective layout by using SLP method. The result shows that the number of backward stream and moving distance diminish evidently.
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김만수 제주대학교 1989 논문집 Vol.29 No.-
The purpose of this study is to effectively analyze the results of heat transfer in obtaining the proper condition for a continuous casting process with stainless steel. The thermoelastic finite element of calculating roll deformation is represented. A thermoelastic model prediction regarding roll deformation is in good agreement with the experimental results considering thermal expansion of the roll. The magnitude of roll deformation due to the thermal expansion and roll separation force is quantitatively represented in analysis of continuous casting with stainless steel.
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