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위험도 정보 활용을 위한 화재 PSA 방법론 개선 연구 현황
이윤환,양준언 한국화재소방학회 2003 한국화재소방학회논문지 Vol.17 No.1
본 논문에서는 현재 세계적으로 사용되고 있는 화재 PSA 방법론을 살펴보고 화재방호를 목적으로 위험도 정보를 이용할 시 요구되는 방법론의 개선 사항을 파악하였다. 화재 PSA의 결과 및 이를 통한 통찰(insight)은 의사 결정을 하는데 완전한 기술적인 근거라 하기 보다는 위험도 정보를 활용한 의사 결정 과정의 일부로서 사용될 수 있으며, 화재 PSA 결과의 적용 분야와 적용 수준은 PSA에서 사용된 모델의 정확성과 타당성에 좌우된다고 할 수 있다. 따라서 화재 PSA의 유용성은 많은 분야의 연구와 개발을 통해 현재 기술 수준 증진에 따라 확대될 것이며, 그에 따라 더 일관성 있는 결과를 낳게 될 것으로 판단한다. In this paper, many vulnerable areas of the present fire PSA methodology were revealed to apply risk-informed fire protection to nuclear power plants. The results and insights from the fire PSA should be used as part of a risk-informed decision making process rather than the complete technical basis for decision making. The degree of support and scope of applications is dependent on the accuracy and validity of the model used in the fire PSA. Accordingly, the usefulness of the fire PSA will increase as ongoing research and development efforts lead to improvements in the state of the art technology, and as improvements in implementation of the state of the art technology lead to more consistent results.
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이윤환 建陽大學校 1996 建陽論叢 Vol.- No.4
A system of judicial review of legislation is divided two types in the point of view as comparative law. The one is type of U.S.A., the other is type of Europe. This system is not results of pure logical research. It is results of history and tradition in the community of law to each country. This study introduces completion and development of a system for the indicial review of legislation in U.S.A. and Europe. It shows the point at issues of the judicial review and suggests the method of improvement in Korean Constitutional law. Therefore, protecting of the constitutional order depend on not only constitutional court but democratic desposition of government, national assembly and intention of nation.
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이윤환 대한노인병학회 2015 Annals of geriatric medicine and research Vol.19 No.3
The prevalence of frailty increases with age, leading to higher risk of disability, institutionalization, and mortality in late life. Approaches to prevent frailty include health risk appraisals to delay the onset of frailty (primary prevention), early detection and management of the prefrail to prevent the progression to frailty (secondary prevention), and interventions to avoid adverse outcomes of those who are frail (tertiary prevention). Accumulating evidence supports potential benefits of physical activity, nutritional supplementation, and individually tailored comprehensive geriatric assessment and management in frailty prevention. More recently, large scale multicomponent trials that combine exercise, nutritional therapy, cognitive training, and geriatric evaluation and management interventions are being conducted. However, the current evidence is insufficient to conclude which frailty preventive strategies are most effective. Promoting cohort studies and clinical trials, developing community-based preventive programs and clinical guidelines, and prioritizing national policy and initiating action plans for the prevention of frailty are urgently needed.
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이윤환,홍순달 한국연초학회 1982 한국연초학회지 Vol.4 No.1
This experiment was carried out to study the influence of temperature on the growth rate and nutrient uptake of tobacco seedlings grown on neutralized charcoal bed during temporary transplanting. The highest growth rate was obtained at tile temperature of 26-22-$l8^{\circ}C$, probably due to fast establishment of roots in the soil. Seedling growth was better in neutralized charcoal bed than in chaffy charcoal bed at each temperature. Days required for fresh weight to reach 20g/10p1ants were shortened by 9~12days as the temperature increased from 18-14-$l0^{\circ}C$ to 26-22-$l8^{\circ}C$. Compared with chaffy charcoal bed, days required for fresh weight to reach 20g/10 plants with neutralized charcoal bed were shortened by about 5 days, 4 days, and 2days at 18-14-$l0^{\circ}C$, 22-18-$l4^{\circ}C$, and 26-22-$l8^{\circ}C$, respectively. Three macronutrient (N, $P_2O_5,\;K_2O$) contents in seedlings increased with increase of temperature. At each temperature, N and $K_2O$ contents in seedlings of neutralized charcoal bed was higher than those of chaffy charcoal bed, whereas that of $P_2O_5$ was low conversely. Nitrate nitrogen from nitric acid that was used to neutralize chaffy charcoal was maintained to tile end of seedling period, providing the source of nitrate nitrogen for the better seedlings.
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이윤환,박지예 연세대학교의과대학 2022 Yonsei medical journal Vol.63 No.1
Purpose: The Geriatric Trauma Outcome Score (GTOS) is a new prognostic tool used to predict mortality of geriatric trauma patients. We aimed to apply this model to Korean geriatric trauma patients and compare it with the Trauma and Injury Severity Score (TRISS) method. Materials and Methods: Patients aged ≥65 years who were admitted to a level 1 trauma center from 2014 to 2018 were included in this study. Data on age, Injury Severity Score (ISS), packed red blood cell transfusion within 24 h, TRISS, admission disposition, mortality, and discharge disposition were collected. We analyzed the validity of GTOS and TRISS by comparing the area under the survival curve. Subgroup analysis for age, admission disposition, and ISS was performed. Results: Among 2586 participants, the median age was 75 years (interquartile range: 70–81). The median ISS was 9 (interquartile range: 4–12), with a transfusion rate (within 24 h) of 15.9% and mortality rate of 6.1%. The areas under the curve (AUCs) were 0.832 [95% confidence interval (CI), 0.817–0.846] and 0.800 (95% CI, 0.784–0.815) for GTOS and TRISS, respectively. On subgroup analysis, patients with ISS ≥9 showed a higher AUC of GTOS compared to the AUC of TRISS (p<0.05). Other subgroup analyses showed equally good power of discrimination for mortality. Conclusion: GTOS can be used to predict mortality of severely injured Korean geriatric patients, and also be helpful in deciding whether invasive or aggressive treatments should be administered to them.
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