• Journal of Navigation and Port Research
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• v.30 no.8 s.114
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• pp.617-622
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• 2006

Gamcheon Harbor was developed to cope with increased freight demand of Busan port and supplement function of the north port. Because container wharf is opened to 1997 as well as general wharf, present maximum 50,000DWT class containerships have been incoming and outgoing. However, In Gamcheon port, small size ships such as fishing boats, miscellaneous boats account for 50 percent of the traffic and a public marine products wholesale market that is building on the north wharf will open in 2008. Therefore, it needs to grasp future year traffic volume before establishing operation plan for port management. Also, analysis on crossing situation risk is required because the breakwater entrance in Gamcheon Harbor is narrow and the crossed passing of ship is ever-present at breakwater front. Thus the traffic volume in the future was presumed and quantitative analysis was achieved on crossing situation though simulations with the traffic volume.

• Journal of Korean Society of Transportation
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• v.14 no.2
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• pp.191-222
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• 1996

현재 쓰이고 있는 무신호 교차로의 서비스수준 측정방법은 지체도에 의해서 판정 되어지고 있으며, 안전도를 기준으로 서비스수준을 측정하는 방법은 존재하지 않는다. 교차 로의 안전은 사고의 횟수를 기준으로 하거나, TCT(Traffic Conflict Technique)를 이용하여 측정되어지고 있다. 두 방법 모두 많은 시간과 인력이 요구되는 방법이다. 이에 많은 시간 과 인력투자 없이 교차로의 안전을 진단하는 방법을 개발하는데 이 연구의 목적이 있다. 무 신호 교차로의 안전에 영향을 미치는 요소로는 교차로의 시거, 운전자의 인지반응시간, 차 두간격, 차량속도, 차중, 노면상태, 날씨 등이 있다. 이 모든 요소들이 복합적으로 작용하여 사고를 유발한다. 이 연구에서는 위의 요소들을 모두 고려하여 무신호 교차로의 안전을 분 석하는 방법을 개발하고저 한다. 위의 요소들 중에서 교차로의 시거를 제일 주요한 요소로 보고 나머지 요소들을 첨가시켜서 분석하는 방법을 썼다. 위에 열거한 많은 요소들을 고려 하기 위해서는 Simulation 방법이 채택되었으며, 그 중에서도 Monte carlo Simulationah형 을 썼다. 이 연구에서는 무신호 4지교차로의 횡단차량에 대해서만 고려하였으며 이 연구에 서 개발된 Simulation 모델을 Conflict의 개수와 그때의 소모된 평균 운동에너지를 산출하여 위험도를 측정하는 기준으로 삼았다. 모델의 결과에 의하면 교차로 시거가 길수록 안전하 고, 상대적으로 시거가 짧을수록 위험하다고 나왔다. 또한 AASHTO의 교차로 시거 값은 약 간 하향 조정하여도 안전도에 있어서는 큰 변화가 없는 것으로 분석되었으며, 아울러 안전 에 의한 서비스수준(LOS. A~F)의 기준이 설정되었다. 모델의 결과에 의하여 교통 공학자들 은 어떤 무신호 교차로의 안전수준을 상대적으로 평가할 수 있으며, 교차로 시거의 개선 후 얻어질 편익을 미리 예상할 수 있다.

• Journal of Veterinary Clinics
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• v.16 no.1
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• pp.80-85
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• 1999

Malassezia(Pityrosoprum) pachydermatis에 의한 피부염의 위험요인을 파악하고자 1997년 1월에서 1998년 12월까지 서울대학교 수의과대학 부속동물병원에 내원하여 본 질환으로 진단된 29두와 동일한 기간 동안 피부과 검사에서 임상적으로 건강한 개로 확인된 97 두의 대조군을 대상으로 분석하였다. 각 설명변수에 대한 교차비(odds ratio, OR)와 신뢰구간(confidence interval, CI)은 변수보정법을 사용하여 계산하였다. 다른 공변수를 보정한 상태에서 다중 로지스틱 회귀분석(multiple logistic regression analysis)을 시행한 결과 피부병기왕력(p=0.0059; OR, 4.44; CI, 1.5∼12.8)과 비만(p=0.0013; OR, 5.38; CI, 1.9∼14.9)은 유의한 위험요인으로 나타났다. 단변량 분석(univariate analysis)에서 주 사료로 고기를 섭취하는 경우 피부염의 위험이 높은 변수로 작용하였지만(p=0.0398; OR, 6.38; CI, 1.1∼37.3) 다른 공변수를 보정한 분석에서는 유의하지 않은 것으로 나타났다. 성별, 품종, 및 예방접종은 위험요인으로 작용하지 않았다.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.736-739
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• 2011

이 연구는 스스로 건강상태를 올바르게 인식하고 있는지 알아보고 건강상태 인식 유형에 따른 건강행동과의 관계를 살펴봄으로 건강수준의 향상과 더불어 건강한 노후를 맞이할 수 있도록 하고자 하였다. 2008년 1월부터 12월까지 실시된 국민건강영양조사 제4기 2차년도(2008) 자료원을 사용하였으며, 200개 조사구 약 4600가구의 만1세 이상 9,744명중 만19세 미만을 제외하고 건강설문 및 검진조사에 참여한 4,688 명을 최종대상자로 분석하였다. 자료는 SPSS 18.0을 이용하여 성별에 따른 인구사회학적 특성, 건강상태 인식 유형별 분포, 주관적 건강상태에 따른 객관적 건강상태와 일반적특성 및 건강행동을 교차분석관적 시에 카이제곱검정을 하였으며, 단변량 분석에서 의미 있는 변수들을 독립변수로 하고 올바른 인식군과 그릇된 인식군으로 나눈 건강상태인식유형을 종속변수로 하여 로지스틱회귀분석을 실시하였다. 이 연구의 주요 결과를 요약하면 다음과 같다. 주관적 건강상태에 따라 실제 객관적인 건강상태를 살펴본 결과, 건강상태를 과대평가하는 사람의 비율이 가장 높았으며, 건강상태를 올바르게 인식하는 사람보다 그릇되게 인식하는 사람이 더 많았다. 2. 주관적 건강상태를 좋음으로 인식하는 군에서 객관적 건강상태는 여자보다 남자가 건강을 과대평가하였고, 연령이 증가할수록, 읍/면지역에서, 결혼상태는 별거 사별 이혼상태에서, 교육수준은 낮아질수록 건강을 그릇되게 인식하여 과대평가하였다. 3. 주관적 건강상태를 나쁨으로 인식하는 군에서 객관적 건강상태는 연령이 낮아질수록 건강을 과소평가하는 경향이었고, 읍/면지역보다 동지역에서, 미혼일 경우, 교육수준은 높아질수록 건강상태를 그릇되게 인식하여 과소평가하였다. 4. 건강상태 인식 유형별로 건강행동을 살펴본 결과 주관적 건강상태를 좋음으로 인식하는 군에서는 체중조절, 월간음주, 우울증상경험, 건강검진에서 유의한 결과를 나타냈고, 주관적 건강상태를 나쁨으로 인식하는 군에서는 현재흡연과 월간음주에서 유의한 결과를 나타내었다. 5. 주관적 건강상태를 좋음으로 인식한 군에서 객관적 건강상태를 종속변수로한 로지스틱회귀분석결과를 살펴보면, 건강을 과대평가하는 그릇된 인식군으로 될 위험도가 남자보다 여자에서 감소하였고, 70대에 비하여 연령이 낮아질수록 위험도가 감소하였으며, 미혼에 비하여 기혼, 별거 사별 이혼에서 위험도가 증가하였고, 체중조절을 하는 사람이 체중조절을 하지 않은 사람보다 위험도가 높았다. 6. 주관적 건강상태를 나쁨으로 인식한 군에서 객관적 건강상태를 종속변수로한 로지스틱 회귀분석결과를 살펴보면, 연령을 제외한 모든 변수에서 통계적으로 유의하지 않았다.

• Journal of Digital Convergence
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• v.13 no.5
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• pp.269-276
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• 2015

In order to examine the relationship between cholesterol level on serum and depression in Korean adults, this study used data of the fourth Korea National Health and Nutrition Examination Survey (KNHANES). 834 persons with depressive symptoms were selected as an index group and 3,317 persons without depressive symptoms as a control group, and odds ratios were calculated by multivariate logistic regression. As a result, odds ratio of depressive symptoms was higher in low LDL group (OR=6.435, 95% CI; 2,358-17.557) than in high LDL group adjusted after monthly income, marital status, period of education, occupation, smoking status, and physical activity. Etiopathogenic mechanism must be found by convergent study in the future.

• Journal of dental hygiene science
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• v.15 no.5
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• pp.612-619
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• 2015

The purpose of this study was to examine the association between oral health status and rheumatoid arthritis (RA). The study used a nationally representative sample of Koreans (2013 Korea National Health and Nutrition Examination Survey) aged 19 years over (n=6,113). Dependent variable was RA, which was assessed with oral health status. Independent variable was oral health status (periodontal status, missing tooth). The chi-square test and logistic regression analysis were performed to identify the association between oral health status and RA. Results of logistic regression analysis for association between periodontal status and RA was no significant. Results of logistic regression analysis for association between missing tooth and RA was statistically significant. The odds ratio (OR) for RA participants was 3.03 (95% confidence interval [CI], 1.47~6.23) in missing tooth 19~28 than missing tooth 0~8. The OR for RA participants was 2.08 (95% CI, 1.06~4.08) in missing tooth 9~18 than missing tooth 0~8. After adjustment for confounders (socio-demographic factors, health behaviors), results of logistic regression analysis was no significant. More missing tooth among adults was greater the risk of RA. By promoting the improvement of oral hygiene and oral health would contribute to reduce the risks associated with systemic diseases. Future study is needed to examine the detailed causal relations between oral health status and RA bidirectionally.

• International Area Studies Review
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• v.21 no.1
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• pp.3-24
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• 2017

The effects of strategic partnership can be positive or negative. This paper intends to explain why the partnership produces opposite results. This paper incorporates strategic behavioral direction and perceived values for relational performance. The conceptual model as well as empirical analysis was made and the results are as follows. First, this study uses bi-directional decomposition of two research constructs. The first construct of perceived values is classified into benefits and risks. Also, the behavioral directions are either active or passive behaviors. The critical path is found that the perceived benefits make significant effects on active behavioral direction which does on commitment. Another path is that the perceived risks make passive behavioral direction which results in opportunistic behaviors between strategically partnered firms.

• Journal of agricultural medicine and community health
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• v.39 no.1
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• pp.1-13
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• 2014

Objective: The objectives were to estimate the rate of the injury in the elderly over the past year and to identify factors related to injury in the elderly in South Korea. Method: Using data from the 2008 Community Health Survey, 43,049 elderly persons, aged 65 years and older, were selected as study subjects. Their experience of injury during the past year and other variables, including socio-demographic factors, health-related factors, and diagnosed chronic diseases, were used. The chi-squared test and multiple logistic regression analysis with weighted analysis were conducted and statistical significance was set at p<0.05. Result: The rate of injury in the elderly during the past year was 5.1%. The most common types of the injury were falling/slipping down and traffic accidents. Factors related to injury in the elderly were living alone, current drinking, depression, poor self-rated health, stroke, and osteoporosis. Living alone (odds ratio 1.23, 95% CI: 1.05-1.45), current drinkers (OR 1.19, 95% CI: 1.05-1.35), poor self-rated health (OR 1.72, 95% CI: 1.43-2.08), depression (OR 1.23, 95% CI: 1.17-1.68), and history of stroke (OR 1.40, 95% CI: 1.17-1.68), and history of osteoporosis (OR 1.45, 95% CI: 1.26-1.66) were related to an increased risk of injury. Conclusions: Intervention programs that consider the risk factors related to injury should be developed and implemented to decrease and prevent injuries in the elderly.

• Korean journal of health promotion
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• v.18 no.4
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• pp.177-183
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• 2018

Background: Many studies have reported that adolescents living with single parent have a high risk of obesity. However, those studies did not explore the implication of the gender of single parent living with adolescents. This study investigated the differences in obesity rates according to status of co-residence with their parents in Korean adolescents. The family living with single parent was classified into the family living with single father and the family living with single mother. Methods: This cross-sectional study involved 59,602 adolescents who participated in the 2017 Korea Youth Risk Behavior Web-based Survey. The data on height, weight, status of co-residence with parents, and the other variables were obtained through online questionnaires. Results: In male adolescents, the family living with single mother was related to a high proportion of obesity (odds ratio [OR] 1.24, 95% confidence interval [CI] 1.09-1.40) and overweight (OR 1.17, 95% CI 1.03-1.34). However, in female adolescents, the family living with single father was related to a high proportion of obesity (OR 1.49, 95% CI 1.23-1.82). In addition, female adolescents living with neither parent were more likely to be obese (OR 1.47, 95% CI 1.13-1.91) and overweight (OR 1.31, 95% CI 1.00-1.70). Conclusions: This study showed a risk of obesity in adolescents living with single parent differs according to the gender of single parent living with adolescents. Not adolescents living with a same-gender parent, but those living with an opposite-gender parent have a high risk of obesity.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.277-283
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• 2020

The purpose of this study was to identify the risk factors influencing stroke. The research method was used two-stage stratified cluster sampling using data from the National Health and Nutrition Survey (2016-2018). This study subjects performed a complex sample logistic regression analysis on adults aged 19 or older. Risk factors affecting stroke were shown as follows: in age groups, odds ratio were conformed when people are in their 70s, the rate is 8.861 times higher; when they are in their subjective health conditions, the odds ratio are 4.501 times higher in the bad groups; odds ratio was 3.158 times higher in the group diagnosed with hypertension and 1.598 times higher in the group diagnosed with diabetes. The result of this study found that chronic diseases such as high blood pressure and diabetes and the management of senior citizens are important because stroke is dangerous and can be managed through prevention.