http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
급성 허혈성 뇌졸중 환자에서 도시-농촌 지역 간 병원 도착 지연의 차이
임창덕,황양하,이미진,신수정,안재윤,김종근,박정배,서강석,류현욱 대한응급의학회 2013 大韓應急醫學會誌 Vol.24 No.6
Purpose: The aim of this study was to compare the difference in acute stroke management between urban and rural areas, to investigate the factors affecting these differences,and to acquire basic information for establishing an efficient regional hub and spoke system for stroke patients. Methods: This retrospective study was based on adult patients diagnosed with acute ischemic stroke from January 2012 to December 2012 at a regional cerebrovascular center. The term “acute” was defined as 24 hours from symptom recognized. The term “urban” was defined as the region within the boundary of a metropolitan area. The distance from the symptom onset location to the stroke center was calculated using a global positioning system. Results: The rate of arriving at a stroke center within 3hours after stroke recognition for acute ischemic stroke patients was much higher in urban areas compared to rural areas (27.5 vs. 19.2%, respectively; p-value=0.011). In stroke cases in rural areas, the distance from symptom onset location to a stroke center was determined as statistically significant through multivariate logistic regression analysis (Odds ratio (OR), 0.982; 95% Confidence interval (CI) 0.969-0.995). In contrast, the use of a public ambulance (OR, 4.258; 95% CI 2.233-8.118) and inter-hospital transfer (OR, 0.416; 95% CI 0.216-0.800) were the main prehospital delay factors in urban areas. Conclusion: For stroke cases in urban areas, it was important to directly visit a stroke center without transfer using a public ambulance. For rural areas, a new hub hospital and policies are necessary for reducing prehospital delay.
임창덕 한국시멘트협회 1977 시멘트 심포지움 Vol.5 No.-
시멘트 입도는 수화반응 속도에 밀접한 관계가 있으며 이로 인한 강도 발현 및 제반 물리특성에 크게 기여한다. 따라서 제품관리에 Blaine 및 sieve test로서 분말도를 check하고 있는바 이 분말도가 cement 물리특성에 미치는 영향을 실험실적으로 검토하였다.
레미콘製造를 爲한 鋼纖維補强콘크리트의 物理的 特性에 關한 硏究
任昌悳,朴承範 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2
Generally, concrete has some disadvantage in anti-impactness and toughness. There are many methods to increase the characteristic of concrete, but we apply it for the steel fiber reinforced concrete(S.F.R.C.). So this report discuss the fundamental experiment about the Physical properties of S.F.R.C. and manufacturing in batch plant with four kinds of steel fiber and variable condition(w/c ratio, cement content, fiber content). The test results are as follows. 1. It has tendency that the more increase fiber content, the more increase the characteristic. In case of 1% of S.F.R.C. It has multiple compressive strength 1.0∼1.3, flexural strength 1.2∼2.0, anti-impactness 5∼10, toughhess 14.0 times comparing with control concrete. 2. It has a tendency that the more increase fiber content, the more decrease the slump. It also has a limitation about the fiber content because it has a fiber ball during mix when it over 1% of fiber content volume. Therefore optimum fiber content of S.F.R.C. is about 1.0∼1.5% by volume. 3. It has tendency that the more increase the fiber content, the more decrease dry-shrinkage. In case of 1.5% of fiber content, it decrease 30% of dry-shrinkage comparing with control concrete. 4. Manufacturing Workability depends upon the fiber content, kind of steel fiber, but when we apply it 1.0% fiber content in batch plant, there is no problem in manufacturing. 5. Slump loss When we make the 1% of S.F.R.C in batch plant, in appear slump loss and fiber ball at 80 minute and in case of 1.5% of S.F.R.C. we know that fiber ball appear at early time. So we conclude that optimum condition of S.F.R.C. in batch plant are fiber content 1.0∼1.5% and under 80 minute of placing time.