• Asian-Australasian Journal of Animal Sciences
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• 제22권1호
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• pp.26-34
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• 2009

Porcine embryonic stem (ES) cells have a great potential as tools for transgenic animal production and studies of regulation of differentiation genes. Although several studies showed successful derivation of porcine ES-like cells, these cells were not maintained long-term in culture. Therefore, this study was conducted to establish porcine pluripotent ES-like cells using in vivo fertilized embryos and to maintain these cells in long term culture. Porcine ES-like cells from in vivo embryos obtained by immunosurgery or whole explant culture were successfully cultured for over 56 passages. Morphology of porcine ES-like cells was flat-shaped with a monolayer type colony. These cells stained for alkaline phosphatase throughout the culture. Furthermore, porcine ES-like cells reacted with antibodies against Oct-4, SSEA-1, SSEA-4, Tra-1-60, and Tra-1-81, which are typical markers of undifferentiated stem cells. To characterize the ability of porcine ES-like cells to differentiate into three germ layers, embryoid body formation was induced. After plating of these cells, porcine ES-like cells were spontaneously differentiated into various cell types of all three germ layers. In addition, porcine ES-like cells were successfully derived from IVF blastocysts in media containing human recombinant basic fibroblast growth factor.

• 한국산학기술학회논문지
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• 제15권2호
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• pp.989-999
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• 2014

본 연구는 대학생의 건강관련 전공과 비건강관련 전공에 따른 건강지각, 자아효능감에 따른 건강증진행위에 미치는 요인을 알아보기 위해 시행하였다. 충남 C도시 5개 대학 592명이 대상이다. 건강증진행위는 건강관련 전공자가 유의하게 높았고(p=.014), 건강관련 전공자와 비전공자 사이에 통학시간(p=.007), 수면 시간(p=.004), 음주(p=0.028), 운동(p<.001), 운동 횟수(p=.012)에 유의한 차이가 있었다. 건강지각(r=0.381, p<.001)과 자아효능감(r=0.620, p<.001)이 건강증진행위에 유의한 정의 상관관계가 있고, 건강증진행위에 미치는 세부 영향요인 분석 결과 비건강관련 전공자는 자아효능의 확신(p<.001), 노력(p=.008), 의지(p=.011)와 건강지각의 현재건강(p<.001), 건강염려(p=.002), 저항성 및 민감성(p=.002)과 유의한($R^2$=0.432, F=38.620) 관계로 나타났다. 따라서 대상자의 특성에 따른 건강증진행위 관련 교육 전략과 활동 프로그램이 필요하다.

• 한국산학기술학회논문지
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• 제22권6호
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• pp.100-107
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• 2021

본 연구는 간호대학생의 회복 탄력성과 성격유형이 전공만족도에 미치는 영향을 알아보기 위한 서술적 조사연구이다. 본 연구대상은 D광역시에 소재하고 있는 4년제 2개 대학에 재학 중인 간호학과 학생들로 하였고, 자료 수집은 2020년 9월 8일부터 10월 6일까지 실시되었다. 자료 분석은 SPSS/WIN 26.0 program을 이용하였으며, 빈도와 백분율, 평균과 표준편차, Pearson;s correlation, Independent sample t-test, One-way ANOVA, Multiple regression을 이용하였다. 본 연구 결과 간호대학생의 회복 탄력성은 평균 3.50점(5점 만점), 성격 유형은 평균 2.28점(4점 만점), 전공만족도는 평균 3.12점(5점 만점)으로 나타났으며, 총 258명 중 A형 성격유형은 122명, B형 성격유형은 136명으로 나타났다. 간호대학생의 회복 탄력성과 전공만족도는 양의 상관관계가 있는 것으로 나타났으며, 이는 회복 탄력성이 높을수록 전공 만족도가 높아짐을 알 수 있었다. 간호대학생의 전공만족도는 A형 성격유형에서 대학생활 만족도, 대인 관계에 유의한 영향요인으로 나타났으며 46.2%의 설명력을 보였다. B형 성격유형에서는 학년과 대인관계에서 유의한 영향 요인으로 나타났으며 42.5%의 설명력을 보였다. 이상의 연구 결과를 보면 전공에 대한 만족도를 고취시키기 위해 대학 생활에서 대인관계를 개선시키고 회복 탄력성을 높일 수 있는 대학지원 프로그램 개발이 요구된다고 생각된다.

• 한국환경과학회지
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• 제8권3호
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• pp.319-323
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• 1999

This study was designed to evaluate the exposure to benzene by residents in neighborhoods near a major roadways, by persons waiting buses, and by drivers and service station attendants while refueling. It was confirmed that the outdoor air benzene concentrations near the major roadways were higher than those further away from the sources. However, neither the indoor air nor breath concentrations were different for two specified residential areas. Smoking was confirmed as an important factor for the indoor air benzene levels. Persons waiting buses, drivers and service station attendants were exposed to elevated benzene levels compared to even the residents in neighborhoods near a major roadways. The mean benzene concentration at bus stop was 2.7 to 6.9 times higher than the mean ambient air concentration. The mean benzene concentrations in the breathing zone of drivers and service station attendants were 95 to 160 and 120 to 202 times higher than the mean ambient air concentrations, respectively.

• 한국안전학회지
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• 제16권1호
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• pp.79-83
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• 2001

Posture of the upper limbs in field works is known to be an important risk factor associated with CTD(Cumulative Trauma Disorders). In particular, uncomfortable posture and highly repetitive works in shipbuilding industry(for instance, sand blasting, grinding and blast painting, etc) made workers exposed to a great risk of injuries. The purpose of this paper is to analyze recruitment pattern of the muscles according to posture(joint angle displacement) during grinding. In this study, EMG signals of pectoralis major, latissimus dorsi, and posterior deltoid muscle were measured and analyzed from FlexComp EMG solution. And subjective ratings of perceived exertion were made using Borg's CR-10 rating scale.

• KIEE International Transactions on Power Engineering
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• 제5A권4호
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• pp.371-377
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• 2005

Congestion problems of transmission lines are very important research issues in power system operations. Load curtailment is one of the ways to solve congestion problems by a major contingency. A systematic and effective mechanism for load shedding has been developed by investigating congestion distribution factors and the direct load control program. In this paper, a load shedding algorithm using linear programming for congestion problems by a major contingency is presented. In order to show the effectiveness of the proposed algorithm, it has been tested on the 6-bus sample system and the power system of Korea, and their results are presented.

• 농촌계획
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• 제5권2호
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• pp.38-45
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• 1999

The purpose of this study is to investigate the characteristics and suggest the Improvement directions of the facilities in Recreational Forests. This study adopted such various analysis methods as reviewing related documents, surveying the existing sites, and using questionnaire to visitors and managers. The result of this study can be summarized as follows ; 1) The major facilities of Recreational Forests are the lodging, recreation, and sports ones. 2) The primary factor for the visitor's satisfaction is the quality of natural environment, but that for their dissatisfaction is the lack of variety of the available facility. 3) The major problems of facilities in Recreational Forests are their number and design. This study suggests the improvement of accessibility and design of the facilities in the Recreational Forests.

• International Journal of Contents
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• 제8권3호
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• pp.42-51
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• 2012

Korea has entered into the Post Catching-up era and the necessity of new innovation strategy in response is being raised. This study argues the necessity of new innovation strategy and discusses the issue of co-ordination between R&D and Human Resource for that as the key factor. From empirical analysis, there seems to be restricted inflow of outstanding human resources to manufacturing sectors and lowering effectiveness of major even with the improved compatibility between major and job. Especially, it is severe in the industries with high R&D investment. It can be interpreted as an incoordination of the technological innovation efforts from the aspect of R&D investment with human resource utilization from the aspect of new human resource. The analytical result and interpretation suggests that there should be more active improvement on the co-ordination between innovative manufacturers' efforts and human resource utilization, in order to keep sustainable development.

• 한국의류산업학회지
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• 제14권3호
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• pp.413-422
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• 2012

This study is to verify the influence of salesperson's nonverbal communication on consumer emotions, and service quality in fashion shopping. This study sample is limited to Busan and Kyungnam Province's fashion shopping consumers. The responders included 239. Data were analyzed by frequency, factor analysis, and AMOS. As the results, kinesics, proxemics, paralanguage, and physical appearance are a major influence on positive consumer emotions that influence service quality. Kinesics and proxemics are a major influence on negative consumer emotions; however, paralanguage, and physical appearance are not a major determinant to influence negative consumer emotions; in addition, there is a direct link between negative consumer emotions and service quality. Also, consumer emotions mediated the relationship between nonverbal communication and service quality. Therefore, fashion firms should train employee manners to ensure that nonverbal communication is important in service encounters.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2010년도 춘계학술대회
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• pp.310-320
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• 2010

In this study, factors affecting the development of new products and research about the relevance of the factors based on the research model was configured. Existing research and technology commercialization process of discrimination that occur in the importance of risk management and open innovation company's competitive advantage in new product development and affect the reporter know what the effect is used as a control variable effects. Factor in the development of new products through research and innovation capacity and knowledge management activities, the introduction of open innovation and enterprise level ever due to the level of risk management controls and the need for effective research to study the model was proposed.