• 한국전문물리치료학회지
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• 제12권3호
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• pp.1-10
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• 2005

The purpose of this study was to examine associations between subjective symptoms of musculoskeletal diseases and the degree of job stress among shipyard workers. The study population was 7,078 employees of the D shipbuilding company. Survey data was obtained from 1,727 employees using a proportional sample according to age and a self-administered questionnaire. The associations were examined with ${\chi}^2$ and logistic regression. The main results were as follows: First, the prevalence of musculoskeletal disease in any one part is 59.5% by NIOSH standard. Second, subjects who had worked in the shipyard for over five years had a prevalence of musculoskeletal disease 1.8 times higher than subjects who had worked in the shipyard for less than five years (p<.01). Finally, those who had less support from co-worker's had a prevalence of musculoskeletal disease 1.3 times higher than subjects who had more support from co-worker's (p<.05). Throughout the results, shipyard workers had higher occurrences of musculoskeletal diseases than other manufacturing workers and the risk of musculoskeletal disorder tended to increase with higher job stress. In this research, the plan to reduce musculoskeletal diseases involved making a program and policy which would be able to lower job stress socio-psychologically. This research will prove useful by using basic preventive materials to improve the musculoskeletal health of labores who work in shipyards and similar places.

• 한국산학기술학회논문지
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• 제21권6호
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• pp.603-610
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• 2020

이 연구는 우리나라 청소년의 정신건강 관련요인을 도출하고자 시도하였는데 특히, 인터넷 사용 영향을 중심으로 하였다. 2018년도에 조사된 제14차 청소년건강행태조사의 원시자료를 분석한 것이다. 대상자는 60,040명으로 남학생 50.7%, 여학생 49.3%였으며, 고등학생 49.7%, 중학생 50.3% 등이었다. 종속변수는 스트레스, 슬픔 및 절망감, 자살생각, 자살계획, 그리고 자살시도이며, 독립변수는 성, 연령, 건강생활 행동과 인터넷 사용시간 등으로 관련요인 도출을 위하여 로지스틱 회귀분석을 적용하였다. 모든 종속변수에 대하여 성, 학년, 경제수준, 학업성적 등이 주요 기여변수로 도출되었고 특히 인터넷 사용시간은 스트레스와 선형적인 관계가 있고, 슬픔, 절망감, 자살생각, 자살계획에서는 사용시간이 '상'인 학생이 더욱 유의한 영향을 보여 결론적으로 인터넷 사용시간은 청소년의 정신건강에 해로운 영향을 미친다는 것을 알 수 있었다.

• 한국컴퓨터정보학회논문지
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• 제19권10호
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• pp.197-205
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• 2014

본 논문에서는 기존의 폐쇄된 기업별 물류시스템의 한계를 극복하기 위한 열린 정보시스템 활용을 통한 기업 간 화물차 공유 원리를 적용하여 회차비용 감소 등의 물류비용 절감을 위한 물류합리화 모형을 개발하였다. 최근에 정보네트워크의 눈부신 발전과 정보인프라가 구축되어 있음에도 불구하고 대부분 국내 물류시스템 운영은 기업별 단독운영의 폐쇄적인 분배정책에 의존하고 있어 제품을 각 기업분배센터에서 소비지로 수송한 후 분배센터로 되돌아갈 때 높은 공차율 상태로 차량을 운영하고 있어 기업물류비용 증가의 원인이 되고 있는 물류효율화 및 혁신을 도모하기 위한 방안을 제시하였다. 특히, 본 연구에서는 분배시스템의 유통경로 중 기업의 분배센터와 제품의 소비지를 연결하는 수송단계에서의 공차율을 고찰하였으며 이를 통한 화물차공유 운용방식을 적용한 물류합리화 방안을 도출하였다.

• 한국직업건강간호학회지
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• 제25권1호
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• pp.55-64
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• 2016

Purpose: The aim of this study was to investigate the association between job stress and metabolic syndrome among male workers. Methods: A total of 396 male workers employed in an electronic company, located in 'P' city, Gyeonggi Province, who had taken medical examination at the 'D' hospital, volunteered in this study. All the data used in this study were obtained from 'D' hospital after getting consent and permission from the workers. General and occupational characteristics, medical history, and health-related behaviors of the subjects were obtained by self-administered questionnaire. Results: The highest occupational stress by sub-sector was reported in the order of insufficient job control, organizational system, lack of reward, job demand, job insecurity, physical environment, job culture, and relationship conflict. The prevalence rate of metabolic syndrome of the participants was 19.9%. The results of the multiple logistic regression analysis on metabolic syndrome of the subjects indicated that the syndrome was significantly higher among those with family history, smoking habit and ex-smoking, working duration of 3 years and over, and with higher total score of occupational stress. It was significantly more prevalent, when the degree of stress was high in the sub-sectors of occupational stress; job autonomy, job insecurity, lack of reward, and job culture. Conclusion: In conclusion, it is necessary to implement a plan to efficiently manage the job stress of these male workers, as the probability of metabolic syndrome increased with the increase of occupational stress. Furthermore, considering the highest occupational stress was found to be job autonomy among its sub-sectors, it is necessary to prepare various measures to enhance the autonomy of such employees.

• 보건행정학회지
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• 제27권4호
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• pp.276-283
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• 2017

Background: Electronic cigarette (e-cigarette) has rapidly increased. Even though e-cigarettes are actually not smoking cessation alternative supplies, some people perceive them as smoking cessation alternative supplies. The purpose of this study is to identify the relationship between e-cigarette experiences and smoking cessation behaviors among Korean adults. Methods: Cross-sectional data was collected from 7,550 participants of Korea National Health and Nutrition Examination Survey in 2014. A total of 867 participants who were current smokers were enrolled in this study. Multi-variable logistic regression analysis were performed to identify the relationship between the smoking cessation behavior and the e-cigarette experience. Results: The e-cigarette experience rate of current smokers was 22.1%. The e-cigarette experience rate was higher in groups with the higher income, the higher education level, and the white collar jobs. Smokers with experience of smoking cessation (odds ratio [OR], 3.03; 95% confidence interval [CI], 1.67 to 5.76) and with intention to smoking cessation in the future (OR, 1.59; 95% CI, 1.05 to 2.43) were more likely to experience the e-cigarette. Especially, smokers who used smoking cessation alternative supplies were more likely to experience the e-cigarette than smokers who did not use it (OR, 2.87; 95% CI, 1.59 to 5.18). Conclusion: We confirmed that e-cigarette experiences were associated with smoking cessation experience, smoking cessation plan, and use of smoking cessation aid among smokers in Korea. Additional studies should be continued to confirm whether e-cigarette are continuously influencing the smoking cessation of current smokers in South Korea as one of the smoking cessation alternative supplies.

• 수산해양기술연구
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• 제54권3호
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• pp.217-223
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• 2018

Overfishing capacity has become a global issue due to over-exploitation of fisheries resources, which result from excessive fishing intensity since the 1980s. In the case of Korea, the fishing effort has been quantified and used as an quantified index of fishing intensity. Fisheries resources of coastal fisheries in the Korean waters of the East Sea tend to decrease productivity due to deterioration in the quality of ecosystem, which result from the excessive overfishing activities according to the development of fishing gear and engine performance of vessels. In order to manage sustainable and reasonable fisheries resources, it is important to understand the fluctuation of biomass and predict the future biomass. Therefore, in this study, we forecasted biomass in the Korean waters of the East Sea for the next two decades (2017~2036) according to the changes in fishing intensity using four fishing effort scenarios; $f_{current}$, $f_{PY}$, $0.5{\times}f_{current}$ and $1.5{\times}f_{current}$. For forecasting biomass in the Korean waters of the East Sea, parameters such as exploitable carrying capacity (ECC), intrinsic rate of natural increase (r) and catchability (q) estimated by maximum entropy (ME) model was utilized and logistic function was used. In addition, coefficient of variation (CV) by the Jackknife re-sampling method was used for estimation of coefficient of variation about exploitable carrying capacity ($CV_{ECC}$). As a result, future biomass can be fluctuated below the $B_{PY}$ level when the current level of fishing effort in 2016 maintains. The results of this study are expected to be utilized as useful data to suggest direction of establishment of fisheries resources management plan for sustainable use of fisheries resources in the future.

• The Plant Pathology Journal
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• 제33권5호
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• pp.441-449
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• 2017

Citrus canker is an important bacterial disease of citrus in several regions of the world. Strains of Xanthomonas citri type-A (Xc-A) group are the primary pathogen where citrus canker occurs. After Xc-A entered the Northeast of Argentina in 1974, the disease spread rapidly from 1977 to 1980 and then slowed down and remained moving at slow pace until 1990 when it became endemic. Citrus canker was detected in Northwest Argentina in 2002. This paper presents the main steps in the fight of the disease and the management strategies that have been used to control citrus canker at this time. We think the process might be usefull to other countries with the same situation. Results from more than 40 years of research in Northeast (NE) Argentina indicate that we are at the limit of favorable environment for the disease. The severity of citrus canker is greatly affected by the environment and El $Ni{\tilde{n}}o$ Southern Oscillation (ENSO) phenomenon which causes cyclic fluctuations on the disease intensity in the NE region. Weather-based logistic regression models adjusted to quantify disease levels in field conditions showed that the environmental effect was strongly modulated by the distance from a windbreak. Production of healthy fruits in citrus canker endemic areas is possible knowing the dynamics of the disease. A voluntary Integrated Plan to Reduce the Risk of Canker has been in place since 1994 and it allows growers to export unsymptomatic, uninfested fresh fruit to countries which are free of the disease and require healthy, pathogen free fruits. The experience from Argentina can be replicated in other countries after appropriate trials.

• Clinical and Experimental Pediatrics
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• 제59권3호
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• pp.126-131
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• 2016

Purpose: To evaluate the diagnostic value of the Vesikari Scoring System (VSS) as an early predictor of pathogens in children with acute gastroenteritis (AG). Methods: In this retrospective study, the VSS score, absolute neutrophil count (ANC), and C-reactive protein (CRP) levels were analyzed in 107 hospitalized children with AG, aged 6 months to 17 years. Patients were divided into nonspecific, viral, and bacterial groups according to the pathogens detected using a multiplex polymerase chain reaction (PCR) test. Results: Patients in the bacterial group had significantly higher CRP values and VSS scores compared to those in the viral group and significantly higher VSS scores compared to those in the nonspecific group (P<0.05). Patients in the viral group had significantly higher VSS scores than those in the nonspecific group (P<0.05). Logistic regression analysis revealed that VSS was the most effective diagnostic tool for predicting the type of pathogen (P<0.05). The area under the receiver operating characteristics curve of VSS was significantly greater than that for ANC and CRP (P<0.05). At a cutoff point of 10 in the VSS, an acceptable diagnostic accuracy could be achieved for distinguishing between bacterial and viral pathogens in AG. Conclusion: VSS can be considered a useful and reliable infectious marker for pediatric gastroenteritis. VSS may be a good early predictor of the type of pathogen, enabling development of a treatment plan before results from a stool culture or PCR test are available.

• Nutrition Research and Practice
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• 제5권1호
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• pp.60-65
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• 2011

Regional differences between large cities and rural areas are observed in the Korean National Health and Nutrition Examination Survey (KNHANES). This present study was conducted to evaluate the effect of dietary factors on hypertension risk in Korean populations, especially residents of the Chungcheong province which was not in metropolitan area, using KNHANES III. A total of 544 adults aged ${\geq}$ 19 years were placed into either the normotensive or the hypertensive group. Subject characteristics, BMI, blood pressure, and nutrient intakes were compared between the two groups using a chi-square test and t-test. We estimated odds ratios (ORs) using multiple logistic regression, adjusted for energy intake and selected covariates. There were significant differences in age, education level, alcohol consumption, and BMI between the normotensive and hypertensive groups. We found decreased ORs for the medium versus lowest tertile of calcium intake (multivariate OR=0.43, 95% CI: 0.21-0.88), for the highest versus lowest tertile of calcium intake (multivariate OR=0.43, 95% CI: 0.20-0.90) with significant trends in risk (P=0.040), and for the medium versus lowest tertile of potassium intake (multivariate OR=0.43, 95% CI: 0.20-0.89). Subjects with the highest sodium/calcium ratio had a 2.10-fold greater risk of hypertension compared to the subject with the lowest, with significant trends in risk (P=0.002). Adequate calcium and potassium intake should be encouraged and regional differences should be considered in making a healthy plan for hypertension management.

• 한국지리정보학회지
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• 제9권2호
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• pp.30-41
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• 2006

이 논문은 효율적인 차량 이동 궤적 관리를 지원하는 e-logistics 시스템을 제안한다. 최근의 무선통신의 발전은 물류 차량의 추적, 휴대폰 사용자 위치 서비스, 위치기반 상거래를 포함한 위치기반서비스들이 등장하게 하였다. 물류 시스템은 물류 센터에서 차량과 배송품의 위치를 계속적으로 파악해야 하므로 차량 추적을 필수적으로 수반하게 된다. 좀 더 나아가서, 계속적으로 이동하는 차량과 배송품의 위치 궤적을 저장하고 관리하는 것은 효율적인 물류 계획과 배송을 지원하기 위해 필수 불가결한 요소이다. 제안된 시스템은 실세계 모바일 환경에서 물류 배송 정보의 효과적인 관리뿐만 아니라, 기존의 공간 데이터베이스가 갖는 공간객체 관리 기능을 포함한다. 또한 효과적인 물류 이동 경로 관리 및 검색을 수행하기 위하여 기존의 TB 트리의 데이터 갱신 성능을 개선하고, 다중버전 기법을 도입한 색인을 사용하였다. 제안된 시스템은 소포관제와 유사한 차량 추적 시스템, 위치기반서비스 등과 같이 실시간 모바일 환경에서 연속적으로 위치를 변경하는 이동객체 관련 분야에 적용 가능하다.