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RISS 인기검색어
- 검색키워드
- 저자 : Dukyun Kang (검색결과 5 건)
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Association between shift work and hyperhomocysteinemia in male workers
Dukyun Kang,Seong-Kyu Kang,Won-Jun Choi,Sang Ha Lee,Jun-Hyung Lee,Kyeongmin Kwak 대한직업환경의학회 2019 대한직업환경의학회지 Vol.31 No.-
Background: Shift work is associated with a higher risk of cardiovascular diseases. Here, we sought to assess the relationship between shift work and plasma homocysteine levels. Determining the correlations between shift work and homocysteine levels may provide a better understanding of the mechanisms underlying cardiovascular diseases. Methods: This study was performed using data from routine health examinations of steel workers in 2017. In total, 431 male workers (70 daytime workers and 361 shift workers) employed on a rolling departure schedule were recruited. Plasma homocysteine levels > 15 μmol/L were considered elevated. The χ2, analysis of variance, and multiple logistic regression analyses were used to examine the association between shift work and plasma homocysteine levels. Results: In comparison to daytime workers, the odds ratio (OR) of hyperhomocysteinemia in individuals with < 10 years of shift work was 1.14 (95% confidence interval [CI]: 0.64–2.03), compared to 2.01 (95% CI: 1.14–3.54) for workers with ≥ 10 years of experience. After adjusting for confounding variables, the adjusted OR for shift workers with < 10 years of experience was 0.95 (95% CI: 0.50–1.80), compared to 2.00 (95% CI: 1.07–3.74) for workers with ≥ 10 years of experience. Conclusions: The risk of hyperhomocysteinemia was significantly higher in shift workers compared to those working normal daytime hours, particularly among long-term shift workers.
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Multidimensional sleep quality of dependent self-employment workers
Sang Ha Lee,Dukyun Kang,Junhyeong Lee,Uijin Kim,Seunghon Ham,Wanhyung Lee,Won-Jun Choi,Seong-Kyu Kang 대한직업환경의학회 2020 대한직업환경의학회지 Vol.32 No.-
Background: The number of workers in non-standard employment (NSE) is increasing due to industrial change and technological development. Dependent self-employment (DSE), a type of NSE, was created decades ago. Despite the problems associated with this new type of employment, few studies have been conducted on the effects by DSE on health, especially sleep quality. This study aims to determine the relationship between DSE and sleep quality. Methods: This study analyzed data of 50,250 wage workers from the fifth Korean Working Conditions Survey. Workers that did not respond or refused to answer any questions related to variables were excluded, and finally 36,709 participants were included in this study. A total of 2,287 workers (6.2%) were compared with non-DSE (34,422; 93.8%) workers, and multiple logistic regression analyses were applied. Results: DSE status had a significant association with difficulty falling asleep (odds ratio [OR]: 1.331, 95% confidence interval [CI]: 1.178–1.504), difficulty maintaining sleep (OR: 1.279; 95% CI: 1.125–1.455), and extreme fatigue after waking up (OR: 1.331; 95% CI: 1.184–1.496). A multiple logistic regression of the variables for sleep quality in DSE showed a significant association with exposure to physical factors for all types of poor sleep quality as well as shift work for difficulty maintaining sleep with extreme fatigue after waking up. Long working hours and emotional labor were also associated with extreme fatigue after waking up. Conclusions: This study shows a significant association between DSE and poor sleep quality, especially when workers were exposed to physical risk factors (noise, vibration, abnormal temperature, etc.) and shift work.
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Association between serum ferritin and hypertension according to the working type in Korean men
Dong-Hoon Lee,Seong-Kyu Kang,Won-Jun Choi,Kyeong Min Kwak,Dukyun Kang,Sang Ha Lee,Jun-Hyung Lee 대한직업환경의학회 2018 대한직업환경의학회지 Vol.30 No.-
Background: Several studies suggest that serum ferritin concentrations reflect systemic inflammation, and high ferritin levels can increase the risk of hypertension in adult men. Shift work is also known to increase the risk of hypertension; however, there has been no study about the relationship between serum ferritin levels and the prevalence of hypertension according to the working type. Methods: This cross-sectional study included 4,442 male participants (3,651 daytime workers and 791 shift workers) who participated in the fifth Korean National Health and Nutrition Examination Survey. Hypertension was defined as a systolic blood pressure greater than or equal to 140 mmHg, a diastolic blood pressure greater than or equal to 90 mmHg or the current use of antihypertensive medications regardless of blood pressure values. For the statistical analyses, serum ferritin levels were reclassified into quartiles, and complex sample analyses were used to evaluate the relationship between serum ferritin levels and the prevalence of hypertension according to the working type in this study. Results: Serum ferritin and shift work were positively associated with the prevalence of hypertension. The effect of interaction was above multiplicative. When compared to participants in the lowest serum ferritin quartile, the odds ratio for hypertension for participants in the highest serum ferritin quartile was 1.372 (1.027–1.833) in daytime workers and 2.009 (1.042–3.873) in shift workers after adjustment. Conclusions: The prevalence of hypertension increased as ferritin levels increased in individuals, especially in shift workers.
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CORBA에서 그룹 통신 지원을 위한 투명성 있는 객체 그룹 참조 관리에 관한 연구
조영주(Youngjoo Joe),이동만(Dongman Lee),남덕윤(Dukyun Nam),강경란(Kyungran Kang) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅲ
분산 어플리케이션에서 고장에 잘 견디고 높은 가용성을 제공하기 위해 객체 복제를 사용한다. 그리고, 객체 그룹에서 복제된 객체들 간의 일관성을 제공하기 위해 그룹 통신에서 그룹 멤버쉽을 사용한다. 그룹 멤버쉽 서비스는 사용자가 하나의 객체 참조를 사용하여 객체 그룹에 접근할 수 있도록 하는 기능을 제공한다. FT-CORBA에서는 그룹 멤버쉽 정보를 포함하는 IOGR (Interoperable Object Group Reference)을 제공하지만, 객체 복제가 그룹에 참여하거나 떠날 때마다 IOGR이 그룹의 모든 멤버에게 변경 사항을 전달해야 한다는 부담을 갖는다. 본 연구에서는 동적인 멤버쉽의 변경에서도 투명성 있는 객체 그룹 참조 관리를 할 수 있는 기법을 제안하고, 제안된 기법을 OCI기반의 그룹 통신지원을 위한 프레임워크를 활용하여 구현하였다.
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