• Asian-Australasian Journal of Animal Sciences
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• 제17권10호
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• pp.1338-1343
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• 2004

The Debao pony ear marginal tissue fibroblast cell line (NDPEM 2/2) was uccessfully established using either primary explant technique or collagenase technique. The characterizations of the cell line were identified as following: the cells were adherent and of density limitation; population doubling time (PDT) of cells made with the two techniques were 35.9 h and 48 h, respectively; chromosome analysis showed that the frequency of cell chromosome number to be 2n=64 was 91.3%-92.8%. Confirmed by isoenzyme analysis, this cell line had no cross- contamination. Tests for microbial contamination from bacteria, fungi, virus or mycoplasma were negative. This newly established cell line meets all the standard quality controls of ATCC. It will provide a precious genetic resource for the conservation of the Debao pony breed, as well as effective experimental material for genetic studies on Debao ponies.

• Communications for Statistical Applications and Methods
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• 제3권2호
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• pp.161-168
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• 1996

Multistage hierarchical models and Bayesian inferences about finite population total estimations are considered. Here, Gibbs sampling approach that can be used to predict the marginal posterior means needed for Bayesian inferences is proposed.

• Journal of Species Research
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• 제10권1호
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• pp.63-71
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• 2021

Anteholosticha bergeri and Bakuella granulifera were isolated from soil samples collected from Muuidong and Songdo-dong, Incheon and confirmed new to South Korea. Including these two newly recorded species, 11 species of Anteholosticha and four species of Bakuella have been recorded in South Korea to date. Anteholosticha bergeri was discriminated from congeners by following characters: cortical granules, 12-16 macronuclei, 5-8 midventral pairs, 2-3 pretransverse cirri, 4-6 transverse cirri, and three dorsal kineties. Bakuella granulifera was identified by cortical granules, 5-11 buccal cirri, 2-5 frontoterminal cirri, 2-5 midventral cirri rows, and 8-12 transverse cirri. The Korean A. bergeri population corresponds to the Austrian population, except for the number of marginal and transverse cirri, and the Korean B. granulifera population corresponds to the Namibian population, except for body size. In addition, small subunit ribosomal RNA(18S rRNA) gene sequences from both species were determined.

• 응용통계연구
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• 제17권1호
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• pp.89-103
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• 2004

2차원 분할표 형태의 자료에 대해 두 범주형 변수들간의 독립성을 검정함에 있어, 만일 두 변수 각각의 모분포가 이미 완전히 알려진 경우라면 이 알려진 정보를 충족할 수 있도록 분할표 자료를 보정한 후 보정된 분할표 자료에 대해 전통적인 카이제곱 검정법을 적용하는 것이 더 타당함을 논증한다 그리고 이에 근거한 제약상황 카이제곱 독립성 검정법을 유도하고 모의실험을 통해 전통적인 무보정 카이제곱 검정법과 비교한다.

• Journal of Plant Biotechnology
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• 제45권3호
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• pp.196-206
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• 2018

고구마는 식량뿐만 아니라 전분을 비롯하여 카로티노이드, 비타민C, 비타민E, 안토시아닌과 같은 저분자 항산화물질을 생산하는 중요한 산업용 뿌리작물로 건조 등 조건 불리지역에 적용이 가능한 최고의 전분작물로 각광받고 있다. 이러한 관점에서 중국, 일본을 비롯한 세계 각국에서 오믹스 기반 유용유전자 발굴 및 활용에 대한 연구가 활발히 진행되고 있다. 또한 2014년부터 한 중 일 고구마연구협의회(TRAS)를 중심으로 Xushu 18(6배체) 고구마 유전체 해독 연구가 진행되고 있으며 거의 완성단계에 이르고 있다. 향후 고구마 유전체 해독이 완성되면 오믹스 기반 연구결과와 더불어 전분대사, 항산화물질 대사, 환경스트레스, 기능성 등의 기작에 관여하는 유용유전자 분리 및 활용 연구의 활성화에 기여할 것이며 6배체 고구마 유전체 해독 연구는 식물 유전체 해독에 있어 가장 문제시되는 다배수체 식물의 유전체 해독 문제해결에 가장 큰 기여를 할 것으로 기대 된다. 본 논문은 현재까지 연구된 고구마 생명공학 연구 현황과 조건 불리지역 분자육종 전망에 대해 기술하였다. 이러한 연구 동향 분석은 고구마를 활용한 글로벌 식량, 에너지, 환경문제 해결을 위한 실용화 연구에 도움이 될 것으로 생각된다.

• KDI Journal of Economic Policy
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• 제27권2호
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• pp.155-203
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• 2005

경제활동참가 증진을 위해서는 노동시장에의 참여나 잔류를 어렵게 하는 요인들을 파악해야 하며, 이를 위해서는 개별 인구그룹들의 이질적인 노동시장 참가 양태에 대한 관찰이 우선적으로 필요하다. 본고는 경제활동인구조사로부터 구성한 패널데이터를 이용하여 각 경제활동상태 간을 이동하는 양태, 지속기간, 산업 간 및 종사상지위 간 이동방향 등을 한계노동자그룹별로 살펴보았다. 이와 함께, 경제활동상태 변화의 빈도를 다항로짓 분석(Multinomial logit)을 통해 경제활동상태 변화패턴에 영향을 미치는 요소들을 파악하였다.

• Journal of Plant Biotechnology
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• 제36권3호
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• pp.197-201
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• 2009

The food self-support rate on the basis of cereals in Korea is approximately 27%, which will threaten the national food security. The dramatic increase in population accompanied by rapid industrialization in developing countries has caused imbalances in the supply of food and energy. To cope with these global crises over food and energy supplies as well as environmental problems, it is urgently required to develop new environmentally friendly industrial crop varieties to be grown on marginal lands including desertification areas for sustainable development. Sweetpotato (Ipomoea batatas (L.) Lam.) ranks seventh in annual production among food crops in the world. Its wide adaptability on marginal lands and rich nutritional content provide a high potential for preventing malnutrition and enhancing food security in the developing countries. In addition, sweetpotato can be developed as a bioreactor to produce valuable industrial materials including bio-ethanol, functional feed and antioxidants by molecular breeding. In this respect, we focus on the molecular breeding of sweetpotato with multi-function on marginal lands. The strategies for development of environmentally friendly industrial sweetpotato will be introduced and discussed.

• 가정의학회지
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• 제39권6호
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• pp.364-369
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• 2018

Background: Compared with other chronic diseases, hearing loss is generally overlooked from the perspective of disease burden. However, hearing loss is emerging as an important issue in the current society. The objective of this study was to investigate disease burdens and marginal utilities associated with hearing loss and other chronic diseases. Methods: This study analyzed the cross-sectional data of 32,986 participants aged 19 years and older who completed the Korea National Health and Nutrition Examination Surveys between 2009 and 2013. Additionally, this study used the pure tone audiometric test, European Quality of Life-Five Dimensions Questionnaire, and chronic disease status. The data were analyzed using a multiple linear regression method. Results: The data of 23,297 people who underwent a pure tone audiogram and completed the European Quality of Life-Five Dimensions Questionnaire were used in this analysis. The marginal utility of hearing loss ranked fifth among nine chronic diseases. The estimated loss of quality-adjusted life years associated with hearing loss was -93.69 years per 100,000 people, which is similar to other chronic diseases. Conclusion: This study assessed the marginal utilities and public burdens of hearing loss and eight chronic diseases in a South Korean population. Although the values may vary depending on country and race, this study may provide an indispensable foundation for more detailed studies on hearing loss.

• Journal of Information Technology Applications and Management
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• 제28권6호
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• pp.97-116
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• 2021

Due to the decrease in the school-age population and government regulations, universities have made great efforts to secure their own competitiveness. In particular, the selection of universities with financial support based on the recent evaluation of the Ministry of Education has become a major concern enough to affect the existence of the university itself. This paper extracts three-year data from 124 major private universities nationwide, and quantitatively analyzes the variables of major universities selected as self-improvement universities, competency reinforcement universities, and universities with limited financial support. As a result of estimating the selection of self-powered universities using the ordered logit model by hierarchically inputting 12 variables, student competitiveness in the metropolitan area (1.318^**), Educational Restitution Rate (4.078^***), University operation expenditure index rate (1.088^***) values were found. Significant positive coefficient values were found in the admission enrollment rate (45.98^***) and the enrollment rate (13.25^***). As a result of analyzing the marginal effects, the increase in the rate of reduction of education costs has always been positive in the selection of self-powered universities, but it was observed that the rate of increase decreases in areas of increase of 150% or more. On the contrary, the probability of becoming a Em-powered university was negative in all sectors, but on the contrary, it was analyzed that marginal effects increased at the same time point. On the other hand, the employment rate of graduates was not able to find direct significance with the result of the selection of Self powered universities. Through this paper, it is expected that each university will analyze the possibility and shortcomings of the selection of Self powered universities in policy making, and in particular, the risk of dropout of selection for the vulnerable field can be predicted using marginal effects. It can be used as major research data for both university evaluators, university officials and students.

• Journal of the Korean Statistical Society
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• 제32권2호
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• pp.175-191
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• 2003

An empirical Bayesian approach is discussed for estimation of characteristics from the two-way balanced rotation sampling design which includes U.S. Current Population Survey and Canadian Labor Force Survey as special cases. An empirical Bayesian estimator is derived for monthly effect under presence of two types of biases and correlations It is shown that the marginal distribution of observation provides more general correlation structure than that frequentist has assumed. Consistent estimators are derived for hyper-parameters in Normal priors.