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정동욱,김준식,조수민,이연아,김광호,김세원,이민원,Jeong, Dong-Wook,Kim, Jun-Sik,Cho, Soo-Min,Lee, Yeon-Ah,Kim, Kwang-Ho,Kim, Sae-Won,Lee, Min-Won 한국생약학회 2000 생약학회지 Vol.31 No.1
Chemical investigation of the stem bark of Alnus hirsuta Turcz var. sibirica (Betulaceae), one of the indigenous Alnus species growing in Korea has led to the isolation of five diarylheptanoids. Structures of these compounds were identified as hirsutenone (1), hirsutanonol (2), oregonin (3), (5S)-1,$7-bis-(3,4-dihydroxyphenyl)-heptan-3-one-5-0-{\beta}-D-glucopyranoside$ (4) and (5R)-1,$7-bis-(3,4-dihydroxyphenyl)-heptane-5-0-{\beta}-D-glucopyranoside$ (5) by the analysis of spectroscopic evidences and comparison with the data of authentic samples.
와이블 고장모형 하에서 경고한계를 고려한 $\bar{X}$ 관리도의 경제적 설계
정동욱,이주호,Jeong, Dong-Wook,Lee, Joo-Ho 한국품질경영학회 2012 품질경영학회지 Vol.40 No.2
Since Duncan(1956) first proposed an economic design of $\bar{X}$-control charts, most of the succeeding works on economic design of control charts assumed the exponential failure model like Duncan. Hu(1984), however, assumed a more versatile Weibull failure model to develop an economic design of $\bar{X}$-control charts and Banerjee and Rahim(1988) further improved Hu's design by changing the assumption of fixed-length sampling intervals to variable-length ones. In this article we follow the approach of Banerjee and Rahim(1988) but include a pair of warning limits inside the control limits in order to search for a failure without stopping the process when the sample mean falls between warning and control limits. The computational results indicate that the proposed model gives a lower cost than Banerjee and Rahim's model unless the early failure probability of a Weibull distribution is relatively large. The reduction in cost is shown to become larger as the cost of production loss outweighs the cost of searches for a failure.
정동욱(Jeong, Dong Wook),이호준(Lee, Ho jun),조성경(Cho, Sung Kyung),이현국(Lee, Hyunkook),정승환(Jung, Seunghwan) 한국교육재정경제학회 2013 敎育財政 經濟硏究 Vol.22 No.4
The purpose of this paper is to investigate Performance Improvement Priority School(PIPS) policy, a representative educational accountability policy in Korea, whether sufficient school finance is funded to these schools to meet the target of accountability policy. Using 'School Information' 2009 data of every elementary school, junior high school, and high school in Republic of Korea, we identified policy-intended treatment group and estimated adequate cost of education at each school with education cost function(ECF) in order to measure cost of adequate education and additional cost to meet adequate education of PIPS. Furthermore, we compared and analyzed what traits are commonly shared in schools with high and low additional cost of adequate education. We found that even though PIPS secure more school funding compared to other schools, this amount is still not enough to meet the target of policy considering conditions of PIPS. These schools additionally require 54,000KRW in elementary schools, and 92,000KRW in junior high schools, and 460,000KRW in high schools on average. These figures show that extra cost is needed when students grow older, moreover, between school gap of extra cost is widening from elementary schools to high schools(91,000KRW, 171,000KRW, 586,000KRW each). Schools which were in need of high extra cost, were in low performance, small in school size, and with low school SES(socio-economic status). In conclusion, this paper suggests extra funding should be provided to PIPS to meet target of policy with considerations in actual school needs. 본 연구는 전국 초 중 일반고 전수데이터 자료인 학교알리미 2009년 자료를 활용하여 우리나라 교육책무성 정책인 학력향상중점학교 정책의 목표를 달성하는데 필요한 교육비를 학교급별로 충분히 지원받고 있는지 분석하고, 이에 따른 정책적 시사점을 찾는데 연구의 목적이 있다. 이를 위해 정책이 의도한 대상집단을 식별하고 교육비용함수(education cost functions)를 활용하여 적정교육비를 단위학교별로 산출함으로써, 학력향상중점학교 정책의 적정교육비 규모와 교육비 추가소요액을 추정하였다. 아울러, 교육비 추가소요액이 높은 집단과 낮은 집단의 특징을 비교 분석하였다. 분석결과, 학력향상중점학교들은 일반학교에 비해 평균적으로 더 많은 1인당 교육비를 확보하고 있지만, 정책목표 달성에 필요한 교육비용을 충분히 지원받지 못하고 있는 것으로 나타났다. 목표달성에 추가로 소요될 것으로 예상되는 학교별 1인당 교육비 추가소요액은 초등학교 평균 5만 4천원, 중학교 평균 9만 2천원, 일반계 고등학교 평균 46만원으로, 학교급이 올라갈수록 교육비 추가소요액이 올라가고 있었다. 또한 동일 학교급내 학력향상중점학교 간 소요액 편차도 커지는 것으로 나타났다(초 9만 1천원, 중 17만 1천원, 일반고 58만 6천원). 교육비 추가소요액이 큰 학교들은 작은 학교들에 비해 기초학력이상 학생 비율이 낮고, 소규모 학교이며, 사회경제적 배경이 비교적 낮은 것으로 나타났다. 본 연구결과는 학력향상중점학교 사업의 정책목표를 달성하기 위해 현재보다 충분한 재정적 지원(추가 총 소요액: 초 88억8100만원, 중 22억 1650만원, 일반계고 102억1000만원 등 총213억 772만원)이 필요하며, 단위학교별 교육비 추가소요액을 반영한 차등적 재정배분 방식의 도입이 필요하다는 정책적 시사점을 제공한다.