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Ricci curvature of integral submanifolds of an $\mathcal{S}$-space form
김정식,Mohit Kumar Dwivedi,Mukut Mani Tripathi 대한수학회 2007 대한수학회보 Vol.44 No.3
Involving the Ricci curvature and the squared mean curva-ture, we obtain a basic inequality for an integral submanifold of an S-space form. By polarization, we get a basic inequality for Ricci tensoralso. Equality cases are also discussed. By giving a very simple proof weshow that if an integral submanifold of maximum dimension of an S-spaceform satises the equality case, then it must be minimal. These resultsare applied to get corresponding results forC-totally real submanifoldsof a Sasakian space form and for totally real submanifolds of a complexspace form.
효과적인 작업계획에 관한 연구 : COBPION 기종 중심으로
김정식 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1
This study deals with the complement planning and work planning for effective product process management techniques. The first, the complement planning system development that could analyze process, opticmal required-man output and man layout respectively. The second was work planning system development which make use of process, part work standard time, process facility capacity, product-process chart and work schedule.
김정식,Kim, Jeong-Sik 한국자원경제학회 1999 資源經濟學會誌 Vol.8 No.2
환율의 과도한 변동이 무역량을 위축시키는지에 대하여 선진국을 대상으로 그 동안 많은 연구가 있어 왔다. 최근 한국은 1990년 이후 제한하여 오던 환율의 변동허용폭을 폐지함에 따라 환율의 과도한 변동을 경험하고 있다. 본 연구는 한국의 경우 환율의 변동성이 원유수입(原油輸入)에 미치는 효과를 장단기(長短期)로 구분하여 Johansen에 의하여 개발된 공적분기법으로 분석하였다. 분석결과에 의하면 단기에 있어서 환율의 변동성은 원유수입을 감소시키나 장기에는 원유수입에 큰 영향을 주지 않는 것으로 나타났다. 이는 단기에는 원유(原油)의 비축물량이 존재하여 가격의 불확실성이 원유수입을 감소시키나, 장기적으로는 원유수입이 비경쟁적 수입이고 수입기업이 환위험을 감소시키는 기법등을 사용한 결과로 환율의 변동성이 원유수입에 큰 영향을 주지 않았다고 할 수 있다.
金丁植,金銀源 전주대학교 산업경영연구소 1990 産經論叢 Vol.- No.7
The purpose of the thesis is to understand improving the present state in Assebly Line. After applying to Industrical Engineering in order to improve the productivity. So, A method of study was 1. Being taked a V.T.R and All operate of conveyor Assembly Line(B Line) became the subject. After the time was measured. 2. While the time of operate, unnecessary movement course was removed. And Picth Diagram was made out. 3. Being managede the picth Diagram. doing the worker allotment. And being raised the efficiency. The result was A sample Assembly Line work composition was set up. Therefore, by all means being raised adantable ability. The effect was raised productive elevation(33%).
金禎植 건국대학교 1982 論文集 Vol.15 No.1
McAuley[2] proved that regular hereditarily separable strongly complete semi-metric space is metrizable. In this note, we introduced concept of strongly complete and related propertied, and generalized the above theorem : 1) Regular hereditarily separable semi-metric space is hereditarily Lindel‥of. 2) Paracompact strongly complete semi-metic spice is completely metrizable.