• Title/Summary/Keyword: 1968년도

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PERT - CPM의 도입 및 적용

  • Hyoung, Chin-Soo
    • Journal of the Korean Operations Research and Management Science Society
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    • v.1 no.1
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    • pp.67-69
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    • 1976
  • 이 글에서는 다음의 내용을 다루었다. 1. 소개단계(1963-1966년) 2. 교육단계(1966-1969년) 3. 연구보급단계(1968-1971년) 4. 도입적용단계(1972-현재)

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An Analysis of Historical Precipitation data for Water Resources Planning (수자원 계획을 위한 과거 강수량자료의 분석)

  • 이동률;홍일표
    • Water for future
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    • v.27 no.3
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    • pp.71-82
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    • 1994
  • A statistical characteristics, relations of calendar and water year, and frequencies of precipitaion which are necessary for water resources planning were analyzed with long historical data(1905-1991 years). And the analysis of precipitation of the drought periods in 1967-1968 years was carried out. The study basins are the five major rivers in Korea. As a results of this study, annual precipitation shows an increasing trend but its variation has no statistical significance. The rellations of calendar and water year precipitation is presented, it shows that there are little difference of the total precipitation between them. The annual minimum series of total precipitation for the periods of 3, 6, 9, and 12 months by water year are constructed, and frequency precipitation for each periods using 2-parameter lognormal distribution is presented. The analysis of the precipitation in 1967-1968 years shows in a natural river basins that it would be a moderate drought, if dry seasons(Oct-May) or wet seasons(Jun-Sep) has 75 percents of historical mean precipitation of the same periods. And if it has less than 60 percents of historical mean precipitation, it would be a severe drought.

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Hearing Improvement by Ossicular Reconstruction (이소골 재형에 의한 청력 증진술)

  • 김인술;천경두;조순곤;박재균;강현녕;김주일
    • Proceedings of the KOR-BRONCHOESO Conference
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    • 1979.05a
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    • pp.3.3-4
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    • 1979
  • Since 1968, we have performed intact canal wall tympanoplasty with mastoidectomy and reported its methods and results on several occasions. We also reported ossicular reconstruction for hearing improvement after intact canal wall tympanoplasty with mastoidectomy. Many problems were noticed, so several variable operation methods were performed. This paper deals with the following: A checked up of hearing progress after ossicular reconstruction with a 93 cases out of a total 153 cases who had undergone this operation. This covered a period of January, 1973 to February, 1979 in our Department of Otolaryngology.

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미국의 국립과학재단

  • Kim, Heon-Gyu
    • The Science & Technology
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    • v.1 no.4 s.4
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    • pp.41-46
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    • 1968
  • 1.창립 ㆍ기능 2.재단의 행정 기구 3.재단의 연구지원사업 4.1967년도 예산 및 연구비지급 개황 5.미일 협동과학 계획 6.연구기관 시설 확충 7.부언

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