• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2003.05a
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• pp.76-79
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• 2003

주요 우주 발사체 보유 국가에서 1957년부터 1999년 사이에 발사된 우주 발사체의 성공 및 실패 이력에 대해 베이즈 분석기법을 적용하여 각국의 발사체에 대한 신뢰도를 분석하였다. 베이즈 분석기법에서 사전분포함수로는 베타함수를 사용하였으며, 미래의 발사체 성공률을 표현하는 사후분포함수는 년도별 누적된 발사 이력을 반영한 베타 사전함수를 이용하여 년도마다 발사체 신뢰도를 평가하는 경우와 첫 발사부터 1999년까지의 발사 성공률에 대한 평균과 분산을 반영할 베타 사전함수를 이용하여 년도별 발사체 신뢰도를 구하는 경우로 나누어 구하였다. 발사 이력이 많은 국가의 경우에는 베이즈 분석기법으로 구한 성공률과 산술적으로 구한 성공률은 거의 동일하였으나, 발사 이력이 적은 국가에서는 비교적 큰 차이를 나타내었다 따라서 발사 이력이 적은 경우에는 산술적 평균에 의한 성공률보다는 베이즈 기법을 이용한 향후 발사체의 발사 성공률 분석이 우주 발사체의 신뢰도를 평가하는데 적합하다는 것을 알 수 있었다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.5
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• pp.141-149
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• 2020

This study was undertaken to analyze the intervening effect of nursing simulation among nursing students. This was a critical review study, and data obtained were reviewed using various data bases, including RISS, KISS, NDSL, DBpia, and KRI. The terminologies entered in the data base were nursing and simulation. Selected studies were assessed for methodological quality; and narrative, descriptive or one group post-test studies were excluded from the analysis. Ed. Notes: Please review for accuracy. I have suggested the edit to the best of my understanding. Finally, 234 studies were included for investigation. Results included studies of nursing simulation intervention in Korea, commencing from 2008. One group pre-post test and two group post test were more designed in journals comparing to master thesis or doctoral dissertation. Clinical practice was the most frequently studied aspect by both the assessor and student in the two groups' pre-post test design. Nursing competences associated with dependent variables during simulation were integrated skills, critical thinking, communication, cooperation, professional recognition and leadership. The two groups pre-post design explored more varied competences as compared to other designs. Considering the results obtained, we conclude that simulation intervention is an effective teaching method for nursing students to help improve their clinical practice. However, further studies are required to assess the impact of critical thinking and problem solving.

• Journal of agricultural medicine and community health
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• v.33 no.1
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• pp.59-70
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• 2008

Objectives: This study aimed to find out the effects of hospice care in public health centers by evaluating the quality of life of terminal cancer patients and care-giver burden of their families.Methods: From January to December 2007, 32 terminal cancer patients and their familes were selected as with interviews. Instruments used for this study were C-QOL(Cancer-Quality of Life) that was developed by Le(207) and care-giver burden of families that was developed by Seo et al(193). The data were analyzed using frequency, percentage and paired t-test.

• Journal of Korean Home Economics Education Association
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• v.21 no.1
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• pp.71-88
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• 2009

This study was a quasi-experimental study to test a research question: Is the school library-assisted instruction effective in enhancing students' academic achievement? To solve the research question, 14 hours of school library-assisted instruction and traditional lecture were carried out to 164 9th grade middle school female students(82 of experimental group, 82 of control group). SPSS 12.0 was used for statistical analysis of frequency analysis, $x^2$-test, and t-test. The results showed that there was a statistically significant difference between the pre-test and the post-test in the total academic achievement scores of both experiment group and comparison group. There was a statistically significant difference between the pre-test and the post-test in paper and pencil test scores for comparison group. There were statistically significant differences between the pre-test and the post-test both in paper and pencil test scores and performance assessment for two groups. But there were no statistically significant differences between the experiment group and the comparison group in post-test pre-test gap of total academic achievement, paper and pencil test, and performance assessment scores.

• 한국ITS학회:학술대회논문집
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• v.2006 no.10
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• pp.147-153
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• 2006

• Communications for Statistical Applications and Methods
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• v.3 no.1
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• pp.169-177
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• 1996

본 논문에서는 한 유명 농구선수의 과거의 연도별 평균득점과 평균 야투율을 기초로 앞으로의 경기에 대한 평균득점과 평균야투율을 추정하기 위해 몬테칼로 베이지안 분석법 중의 하나인 Sampling-Important-Resampling (SIR) 알고리즘을 이용하였다. 즉 과거의 자료로부터 평균득점과 평균야투율에 대한 사전밀도함수를 설정하고 SIR 알고리즘을 이용하여 사후 밀도함수를 구한 후에 이를 기초로 베이지안 추론을 하였다.

• Journal of the Korean Chemical Society
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• v.51 no.3
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• pp.279-286
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• 2007

In this study, we investigated the influences of cognitive conflict and situational interest induced by a discrepant event and an alternative hypothesis, attention and state learning strategies on conceptual change. A preconception test was administered to 486 seventh graders. They also completed the questionnaires of cognitive response and situational interest to a discrepant event before/after presenting an alternative hypothesis. After learning the concept of density with a CAI program as conceptual change intervention, the tests of attention, state learning strategies, and conceptual understanding were administered as posttests. Analyses of the results for 197 students having misconceptions about density revealed that post-cognitive conflict was significantly higher than pre-cognitive conflict. However, there was no statistically significant difference between the test scores of pre-situational interest and post-situational interest. Pre-cognitive conflict only exerted a direct effect on post-cognitive conflict, while post-cognitive conflict exerted a direct effect and Journal of the Korean Chemical Society an indirect effect via attention on conceptual understanding. Both pre- and post-situational interests were found to influence on conceptual understanding via attention. Attention had influences positively on deep learning strategy and negatively on surface learning strategy. There was a relatively small effect of state learning strategies on conceptual understanding.

• International Journal of Highway Engineering
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• v.9 no.2 s.32
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• pp.77-87
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• 2007

Traffic accidents on freeway are occurred by various factors, and driver inattention is one of the most important factors causing traffic accidents. To warn drivers about unexpected dangerous events and diminish driver inattention problems, traffic safety facilities including warning and regulatory traffic signs; delineators; rumble strips are installed. In this study, the traffic safety effect of shoulder rumble sips were investigated using "Comparison Croup (C-G)" method developed by Hauer. Through the analyses, it was found that numbers of run-off-the road crashes were reduced as 2.43 crashes per year after the installation of shoulder rumble strips on the freeway. Based on the analysis results in this study, it was concluded that shoulder rumble strips on the freeway contribute to reduce traffic accidents, especially run-off-the road crashes.

• Journal of Environmental Policy
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• v.11 no.3
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• pp.67-96
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• 2012

The Ministry of Environment in Korea has been promoting the urban stream restoration project for paved streams in cities as the restored Cheonggyecheon. As an elementary study for suggesting policy implications for the project, cost and benefit criteria for an ex-post analysis on the Cheonggyecheon project is suggested in this study. The ex-ante analysis were reviewed critically by focusing on the cost and benefit criteria. Ex-post analysis plan in this study is developed considering the standard guideline of pre-feasibility, the theory of cost-benefit analysis, and the review results. The costs for compensating lands, amending conflicts, researching rivers, and maintaining water quantity were also included. For the benefits, this study proposes to estimate the benefits with the assessment on naturalness of stream. The results are expected to contribute to increase the efficiency of the urban stream restoration project and evaluate the project to match better with the meaning of the river restoration.

• Journal of Digital Contents Society
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• v.12 no.2
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• pp.233-240
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• 2011

In this study we analyzed the foreign workers' needs for pre-training and post support, and researched possibility of e-Learning as the effective methodology for foreign workers' vocational development. A total of 1872 people were participated in this study. The first contents of the survey were satisfaction and difficulties focusing on pre-training. The second contents were willingness to participate in post-training program, the expected difficulties related to post support. The third contents were preferences and needs of e-Learning, The results revealed various issues of the pre-training and post support. Foreign workers showed high expectation and needs on post training program, but the problems such as lack of time and workplace leave were pointed out to the greatest difficulties. Considering their high preferences for e-Learning, a possibility and necessity of e-Learning which can resolve difficulties of the workplace leave and give the customized service at different conditions and levels of training was anticipated.