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일개 응급의료센터에 내원한 노인 중독 환자의 중증도 예측인자
박창용,차경만,소병학,정원중 대한임상독성학회 2019 대한임상독성학회지 Vol.17 No.2
Purpose: This study examined the clinical characteristics of severe elderly poisoning patients to determine the factors that can prevent them. Methods: Data were collected from patients over 65 years of age presenting to the emergency center with poisoning from 2013 to 2018. Their medical records were analyzed retrospectively, and patients with a poisoning severity score of three or more were defined as the severe poisoning group. The risk factors were evaluated by univariate and multivariate analysis. Results: This study analyzed 292 patients, of whom 37 (12.7%) belonged to the severe poisoning group. The severe poisoning group showed a significantly higher association with pesticide poisoning and intentional suicide attempts. Loneliness and somatization were the cause of the suicidal ideas. No significant differences in age, sex, drinking, ingestion time, poisonous materials other than pesticides, and neuropsychological consultation were observed between the two groups. Conclusion: The severe elderly poisoning patients were the result of intentional poisoning for suicide. Loneliness and somatization were the most influential causes of suicidal poisoning. Therefore, psychiatric screening and frequent medical treatment for elderly people are required to prevent severe poisoning in elderly patients.
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박창용 대한설비공학회 2015 International Journal of Air-Conditioning and Refr Vol.23 No.4
A review study was performed for basic heat transfer mechanism and quantitative analysis of correlations for flow boiling heat transfer in micro-scale channels. Several criteria for determining threshold diameter for micro-scale channels were discussed and the concept of confinement number was commented. The distinctive feature of flow boiling in micro-scale channels were considered and it was found out that the effect of the heat flux, latent heat, viscous force, surface tension, and inertial force was more significant. Important dimensionless parameters were summarized and it was pointed out that the boiling number, capillary number, and Weber number could be expected to play important roles at flow boiling in micro-scale channels. 17 correlations for flow boiling in micro-scale channels were reviewed in this study, and they were categorized by three types of correlations such as an equivalent Nusselt number correlation, a correlation with superposition of nucleate and convection boiling mechanism, and a flow patternbased correlation. The predicted values by the correlations were compared with 536 experimental data from four different literatures and a correlation with smallest prediction errors was found. Some correlations showed distinct trends of convection heat transfer coefficient (h) change with respect to the variation of vapor quality. The trends are categorized by three trends such as noticeable increase of h with the increase of vapor quality and significant continuous decrease after dryout point, minor increase and decrease or decrease and increase of h, and gradual and continuous decrease of h with the increase of vapor quality. For each trend of h change, recommendable correlations and their basic equation forms were proposed to compare the prediction results with experimental data or to develop a new correlation by modifying existing correlations.
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박창용,홍아름 대한건설보건학회 2020 대한건설보건학회지 Vol.2 No.1
Purpose: This study was attempted to provide the necessary data for Vietnamese companies to succeed in adapting to the local market by investigating the level of awareness of the Occupational Safety and Health Act and the work environment evaluation for local workers in Vietnam. Methods: This study is a descriptive study to investigate the perception of local workers in Vietnam on the Occupational Safety and Health Act and the work environment evaluation system. Results: As a result of the awareness survey on the Occupational Safety and Health Act and the work environment evaluation system in Vietnam, the average level of awareness of laws, legal regulations, fines for actions taken, work environment evaluation, occupational diseases, safety protection equipment, and hazardous chemical substances was surveyed high. Conclusion: Reviewing Korea’s leading Occupational Safety and Health Act and gradually applying them to Vietnam’s industrial sites will contribute to the development of the safety and health cooperation system between the two countries and enhancing the global competitiveness of Korean companies that have advanced.
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CORDEX-East Asia phase II 고해상도 다중지역기후모델을 이용한 동아시아 풍력에너지 생산 잠재력의 미래 전망
박창용,신석우,차동현 한국기상학회 2021 한국기상학회 학술대회 논문집 Vol.2021 No.10
동아시아는 고도로 산업화 된 지역으로서 화석연료의 사용으로 인한 이산화탄소 배출이 많은 지역이므로 이산화탄소 저감에 따른 파리협정의 목표를 달성하기 위해서는 이 지역에서 신재생에너지의 생산 증가가 요구된다. 태양광과 풍력 같은 신재생에너지 생산에는 기상과 기후의 영향이 매우 크다. 따라서 신재생에너지의 정책 개발을 위하여 고해상도의 신뢰성 있는 기후자료를 활용한 미래 신재생에너지 생산 잠재력의 현재 및 미래 변화의 상세한 조사가 이루어져야 한다. 본 연구는 태양광에너지 생산 잠재력 연구의 후속 연구로서 동아시아 풍력에너지 생산 잠재력 (Wind Energy Potental, Wpot)의 최근 변화와 CORDEX-East Asia phase II 고해상도 다중지역기후모델을 이용하여 미래 기간에 대하여 이를 전망하였다. 과거 40년 (1979-2018년) 평균 Wpot은 전계절에 걸쳐서 내몽골서부와 동부에서 가장 높고 동아시아 Wpot의 최근 변화는 전반적으로 봄, 가을, 겨울은 증가, 여름은 감소했지만, 지역 간 변동성이 컸다. 특히 Wpot이 가장 큰 봄철에는 우리나라와 내몽골지역의 최근 증가가 가장 컸다. 또한 내몽골지역은 효율이 가장 높은 구간인 12m s<SUP>-1</SUP> 이상부터 25 m s<SUP>-1</SUP> 미만의 풍속이 가장 빈도가 높고 증가율도 가장 컸다. RCP2.6 시나리오의 경우 Wpot은 2021-2050년 근미래에 중국 중남부에서 증가가 크고 우리나라는 여름은 감소하는 패턴을 보이며 중미래 (2051-2080년)에는 동아시아 전반적으로 이전 기간보다 증가, 원미래 (2081-2099년)에는 감소할 것으로 전망되었다. RCP8.5 시나리오는 지역 간의 차이가 RCP2.6 시나리오보다 크고 중국 중남부의 증가가 클 것으로 전망되었다.
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박창용,황정욱,안수현,안희준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
We have fabricated dicyanopyrazine-linked porphyrin mono and multilayer films on polycrystalline gold and quartz substrates using the Langmuir-Blodgett (LB) technique. Two different porphyrins were studied, one with two and the other with four positions of the porphyrin ring substituted with the dicyanopyrazine containing moiety (desig nated 2-DCPP and 4-DCPP, respectively). XPS indicates that the atomic ratios of C, N, and O for the LB films are similar to the theoretical ratios for the dicyanopyrazine-linked porphyrins. AFM reveals that the surface roughness of LB multilayers are higher than that of the LB monolayers due to aggregation of the porphyrin molecules in the multilayer films. The 11-multilayer LB films are only 6 and 4.6 times thicker than the monolayer LB films. This result is consistent with the surface roughness data showing aggregation of dicyanopyrazine-linked porphyrin in multilayer LB films. UV-vis spectroscopy indicates a blue shift of the Q band of the LB films compared with the dicyanopyrazine-linked porphyrin solution due to interaction between stacked porphyrin rings.
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