• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.516-518
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• 2012

해상에서 선박의 충돌확률을 평가하는 것은 해당해역의 잠재적인 해상교통 위험성을 평가하는데 있어 중요하다. 서남해권 해상교통에 중요한 요충지인 완도해역은 동서방향으로는 횡간수도 통과선박들이 항해를 하며, 남북방향으로는 완도항 입출항 선박과 다도해 섬들을 입출항하는 여객선들이 통항을 이루고 있다. IALA 정량적인 해상안전 평가방법인 IWRAP은 통항량, 선속, 길이, 선박의 통항분포로부터 해상에서 통항의 위험도를 평가하므로 인적, 지리적, 환경적 등 주관적인 요소들이 많은 정성적인 평가방법에 비해 적용이 간단하다. 본 연구에서는 VTS 섹터 관제의 관점에서 항로구간별 해상교통의 특징과 개선책을 세우기 위해 IWRAP을 활용하여 완도 해역의 충돌확률을 산출하고자 한다.

• The Korean Journal of Applied Statistics
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• v.7 no.2
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• pp.263-268
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• 1994

Thomas Bayes assumed uniform prior for the location $\theta$ of a billiard ball W in his historic 1764 paper. In this study, following mathematical derivation of the uniform distribution from several assumptions that are plausible on te billiard table, it is argued that the probabilistic meaning of Bayes' uniform prior (especially in Billiard Problem) is not just sujective but logical.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.357-359
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• 2015

부산신항은 우리나라 최대이자 세계 제6위의 컨테이너화물 처리항만으로 자리매김을 하고 있다. 최근들어서 차세대의 친환경 선박으로 벙커C 연료유 대신에 LNG 연료유를 사용하는 선박개발이 본격화되고 있다. 이에 따라서 부산신항의 항만기본개발계획에 들어 있는 유류중개기지 축조 대신에 Bunker LNG(BLNG)터미널 축조를 검토하고 있다. 이 연구에서는 BLNG터미널 개발과 관련하여 초대형 컨테이너선의 남컨 및 북컨 터미널 입항접안에 장애요소로 작용하고 있는 토도의 유무 및 호란도 절개에 따른 해사안전법 상의 해상교통안전진단시행지침에서 규정하고 있는 위험요소에 대한 충돌확률과 선박 운항자의 주관적 평가를 중심으로 안전수역 확보에 대하여 종합적으로 평가, 분석하였다.

• Computational Structural Engineering
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• v.11 no.4
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• pp.219-227
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• 1998

실제 구조물에 있어 확률, 통계 및 이론으로 구해진 랜덤성을 갖는 객관적 불확실성뿐만 아니라 설계자의 경험이나 공학적 판단에 의해 주관적으로 평가되는 인간오차나 시공중의 과오 또는 구조설계에 미치는 사회적, 정치적 및 경제적 요청 등의 퍼지성을 갖는 주관적 불확실성이 존재하기 때문에 현실적으로 랜덤성과 퍼지성을 동시에 고려한 실뢰성평가 즉, 안전성평가에 대한 퍼지이론의 도입이 필수 불가결하다. 따라서 본 연구에서는 기존 구조물의 객관적·주관적 불확실성을 동시에 고려한 신뢰성해석방법으로 베이즈의 의사결정이론에 퍼지이론을 병합한 퍼지-베이즈 신뢰성해석 알고리즘을 개발하여 건축구조물의 신뢰성평가 및 안전성평가에 적용하여 분석하였다.

• The Korean Journal of Applied Statistics
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• v.26 no.5
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• pp.737-746
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• 2013

The Bayesian method can be applied successfully to the estimation of the censored regression model introduced by Tobin (1958). The Bayes estimates show improvements over the maximum likelihood estimate; however, the performance of the Bayesian interval estimation is questionable. In Bayesian paradigm, the prior distribution usually reflects personal beliefs about the parameters. Such subjective priors will typically yield interval estimators with poor frequentist properties; however, an objective noninformative often yields a Bayesian procedure with good frequentist properties. We examine the performance of frequentist properties of noninformative priors for the Tobit regression model.

• The Journal of Korean Society for School & Community Health Education
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• v.19 no.1
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• pp.127-144
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• 2018

배경 및 목적: 이 연구의 목적은 OECD "더 나은 삶의 지수 2015"에서 34개 국가 중 29위로 평가된 한국인의 주관적 건강(subjective well-being)과 치료적 지지(therapeutic support) 관계에서 장소애착(place attachment)의 매개 효과를 탐색하였다. 방법: 비확률 표본추출 방법을 사용하여 서울 시민들 중 헬스클럽 이용자를 대상으로 설문지 조사를 실시하였으며, 구조방정식 모형분석을 통해 가설을 검증하였다. 결과: 분석 결과 치료적 감독(therapeutic oversight )만이 주관적 건강에 직접적인 영향을 미치는 것으로 확인되었다(B = .281, p < .05). 장소애착의 매개효과를 통해서 검증한 결과 치료적 감독 뿐만 아니라 치료적 증언(therapeutic testimonial)에 대해서도 유의하게 검증되었다(치료적 감독 간접 효과 = .155, p < .05, 치료적 증언 간접 효과 = .175, p < .05). 결론: 연구결과 주관적 건강에 영향을 미치는 것으로 장소애착의 매개효과가 큰 것으로 나타났다. 따라서 서로를 돌보며 회원들 간의 업적을 축하 할 수 있는 장소를 기반으로 한 건강 프로그램을 실행한다면 사회 구성원들의 주관적 건강 향상에 도움이 될 것으로 사료된다.

• The Journal of the Acoustical Society of Korea
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• v.26 no.4
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• pp.153-158
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• 2007

This paper presents a new approach to noise estimation to improve speech enhancement in non-stationary noisy environments. The proposed method combines the two separate noise power estimates provided by the minimum statistics (MS) for speech presence and soft decision (SD) for speech absence in accordance with SAP (Speech Absence Probability) on a separate frequency bin. The performance of the proposed algorithm is evaluated by the subjective test under various noise environments and yields better results compared with the conventional MS or SD-based schemes.

• Journal of The Korean Association For Science Education
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• v.25 no.7
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• pp.787-793
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• 2005

The purposes of this study were to investigate the development of probabilistic thinking in relation to the cognitive level of elementary school students and to analyze the effects of probability activities in Thinking Science(TS) program on the development of probabilistic thinking. 152 6th grade elementary school students compiled the sample group which was divided into an experimental group and a control group. Probability activities in TS program were used with the experimental group, while the normal curriculum was conducted with the control group. Both the experimental and control group were assessed with Science Reasoning Task II and a probabilistic thinking test before execution of this investigation and were post-tested with probabilistic thinking test after the project period was complete. Results of this study showed that the students in the concrete operational stage and transitional stage used subjective strategy together with quantitative strategy in probability problem-solving, and students in the early formal operational stage used quantitative strategy in probability problem-solving. It was also found that the higher the cognitive level of students, the higher the probabilistic thinking level. The probability activities of the TS program influenced the development of probabilistic thinking of elementary school students. Assessing the development of probabilistic thinking on the basis of the cognitive level found that the level of effectiveness was significantly higher for students in the early concrete operational stage and transitional stage than students in any other stage.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.244-250
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• 2014

Recently, the Diabetes Mellitus is the major cause of death in Korea. According to the results of v 2011, 34% of adult(over 19 years) are diagnosed as a DM and 21.5% of the aging(over 65 years) are also DM. So in this study, we find out the status of DM prevalence among old people and related factors. Using the results, we will suggest several ways to prevent DM. We use Korean Longitudinal Study of Ageing(2006, version1.2)that those diagnosed with Diabetes Mellitus. We carried out X2 test and Binary Logistic Regression by IBM SPSS 19. 65~79 ages (p=0.006, OR=1.482), Urban people (p=0.008, OR=1.366), People diagnosed with Hypertension (p<0.001, OR=1.237), have high probability of Diabetes Mellitus. However, Subjective health condition(good) (p=0.005, OR=0.648), Subjective health condition(normal) (p<0.001, OR=0.335), and People diagnosed with Chronic lung disease (p=0.002, OR=0.778) have low probability of diabetes. Based on the study results, politic proposals were disccused.

• Journal of Digital Convergence
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• v.15 no.11
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• pp.37-48
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• 2017

This study aims to examine the effect of housing environment on single mothers' health and to find out how to improve their health and housing environment. For the purpose, this study analyzed the Single-parents survey carried out by Ministry of Gender Equality and Family in 2015. The results are as follows. When residential functions such as mining, heating, and noise are not fulfilled among the physical characteristics of the residential environment, single-mothers are more likely to feel unhealthy. Among the socio-economic characteristics of housing, people who live in public rental housing are more likely to feel unhealthy than those living in own house. And people who have excessive household debt are less healthy than those having no debt. Socioeconomic characteristics of housing environments had a significant effect on depression of single-mothers. Based on the results, the author suggested that housing improvement services, survey of housing conditions of single parents, provision of services considering household debt and improving residential conditions of public rentals houses should be implemented.