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이영삼 대한안전경영과학회 2016 대한안전경영과학회지 Vol.18 No.3
Currently many geriatric hospitals have been built in Korea because younger people don’t want to care their parents and have been decreasing for labor. However, the increasing geriatric hospitals make the increasing fire safety accidents. Therefore, this study is conducted by survey and face-to-face talk for analyzing fire safety problem of twelve among 15 geriatric hospitals in the north of Chung-Buk area. The result of this study is that infection and fall accident are higher than others and fire safety implement rate of safety rule followed by CEO is 71%. Monthly safety training rate is 49% and initial fire safety training not conducted is 33%. Yearly outside fire safety training rate is 97% but workers who know how to use fire evacuation facility are 61%. Furthermore, safety instruction rate of fire safety manager is much higher than supervisor’s safety instruction. The cause of accident is facility (33%). In conclusion, the institution and rule improvement need for decreasing infection and falling, increasing implement level of fire safety rule and fire safety training, participation rate of supervisor for fire safety, quality of fire safety training, and investment of fire safety facility.
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이영삼 대한뇌졸중학회 2007 Journal of stroke Vol.9 No.2
Background: Helicobacter pylori (H. pylori) have been associated pathogenetically with coronary atherosclerosis. Although stroke is pathogenetically related to coronary heart disease, data on relationship between chronic infection and acute ischemic stroke in Korea are lacking. Therefore, we verified the relation of chronic H. pylori infection and risk of acute ischemic stroke, also chronic H. pylori infection and stroke subtypes. Methods: From July 2004 to May 2005, 228 patients with acute ischemic stroke and 64 control subjects were enrolled in this study. All patients underwent diagnostic work-up including brain MRI, mognetic resonance (MR) anogiograhpy, risk factor evaluation and subtype classification according to the Trial of Org 10172 in the Acute Stroke Treatment (TOAST) criteria. IgG antibodies to H. pylori was measured by enzyme linked immunosorbent assay technique. Results: There was tendency that H. pylori seropositivity in stroke patients (74%) was higher than that of controls (64%). Chronic H. pylori infection was associated with a higher risk of acute ischemic stroke patients under 65 years (adjusted odds ratio: 2.608; 95% CI: 1.151-5.908) and small vessel disease (SVD)(adjusted odds ratio: 2.762; 95% CI: 1.257-6.067). Conclusion: This study shows that chronic H. pylori infection is associated with acute ischemic stroke patients under 65 years and SVD. Further studies are required to reveal whether chronic H. pylori infection is an independent risk factor for acute ischemic stroke. (Korean J Stroke 2007;9:120-123)
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사업장의 소음분석을 통한 화재경보음 인지정도에 관한 연구
이영삼,이동호 대한안전경영과학회 2013 대한안전경영과학회 학술대회논문집 Vol.2013 No.1
본 연구에서는 인천광역시의 37개 사업장(공장)을 대상으로 작업현장의 소음을 측정 및 분석하여 소음이 화재경보음 인지에 미치는 영향을 분석하였다. 측정결과 평균소음 이 95.8dB(A)나왔다. 이는 국내 경보장치 음량기준(화재경보음 발생장치에서 1m떨어 진 곳에서 90dB이상)보다 5.8dB(A)높게 나왔다. 미국방화협회(NFPA)에 따르면 암소 음(기기음)이 85dB(A)이거나 이상일 경우 화재경보음 인지정도가 미흡하기 때문에 다 른 방법을 강구하도록 되어 있다. 또한 화재경보음은 암소음보다 15dB(A) 높아야 한 다고 하고 있다. 따라서 주변의 환경을 무시한 획일적인 화재경보음 설계에 대해서 제 도적 및 법적 개선이 필요하다고 사료된다.
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아파트 지하주차장 소화기의 유지관리 효율화 방안에 관한 연구
이영삼 대한안전경영과학회 2016 대한안전경영과학회지 Vol.18 No.3
The definition of an apartment is a building more than 5 stories high and which is the standard law. Currently, the number of apartments is increasing much faster than detached houses. Owning an apartment is a normal trend these days. However, the increasing number of apartments has been increasing the number of apartment fires which also has been making social problems. Therefore, this study was conducted for the fire extinguisher among other fire facilities because it is important for initial fire suppression. The research subject is on the fire extinguisher that is in the underground parking lot of 40 apartment complexes which are more than 10 stories. Survey and analysis were conducted for 80 fire extinguishers. There are two fire extinguishers for each apartment. The result of this study is that all installed fire extinguishers are ABC dry chemical type, 92% of them is 3.3kg and that meet the legal height(less than 1.5m). However, the condition such as appearance, inspection, manufactured year, appearance of signs, material of signs, size of signs, etc. was insufficiency. So improvement of law and system that are fire facility construction, maintenance implementation and additional designation of type approval about sign will be needed in my opinion.
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공장소음으로 인한 화재 경보음 인지 영향정도에 관한 연구
이영삼 대한안전경영과학회 2015 대한안전경영과학회지 Vol.17 No.4
The people who are in the noise factory are difficult to hear and recognize about fire and to evacuate quickly when a fire occurs. This study was conducted to analyze workplace’s background noise of 31 factories in Incheon and to know the workplace noise level comparing to fire alarm sound level. The measured average noise level was 96.8dB(A). Noise level of measured result was exceeded as 6.8dB(A) comparing to NFSC (National Fire Safety Code) noise level of 90dB. NFPA suggests that when background noise exceeds 85dB or more than that, other methods should be considered to know alarm sound. Also fire alarm sound should exceed more than 15dB(A) comparing to background noise level. Therefore it was concluded that the design of the fire alarm systems should not be applied to the workplace without considering background noise and it needs to be improved with regulations and the systems.
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기울기가 일정한 코드를 사용한 개선된 PDP용 subfield 기법
이영삼,김린철,이병욱,Lee, Young-Sam,Kim, Rin-Chul,Lee, Byung-Uk 대한전자공학회 2002 電子工學會論文誌-SP (Signal processing) Vol.39 No.5
본 논문에서는 plasma display panel에서 동영상을 표현할 때 발생할 수 있는 dynamic false contour (DFC) 등의 화질 열화를 개선할 수 있는 subfield 기법에 관하여 고찰한다. 인접한 subfield 들간의 시간 길이 차이로 인하여 DFC가 발생한다는 사실을 파악하고, 그 차이를 일정하게 유지하는 기울기가 일정한 code를 제안한다. 그리고, 에러의 첨두치와 지속 시간의 trade-off 관계를 고려하여 에러의 절대값의 평균을 최소화 할 수 있도록 상이한 시간 길이를 갖는 subfield들을 배열한 code를 제안한다. 제안한 subfield 기법은 계조값에 비례하여 에러의 크기가 증가하는 것을 보임으로써 인간의 시각적 특성 관점에서도 적합한 방법임을 입증하였다. This paper presents a new subfield method that can alleviate the visual artifact called the dynamic false contour (DFC), which occurs on plasma display panels. Nothing that the DFC is caused by the difference of time intervals between the adjacent subfields, we propose a constant slope code, in which the differences are maintained to be constant. Also, we propose a subfield code that can minimize the mean absolute error, considering the trade-off between the peak magnitude of the error and its duration. We will show that the proposed subfield method maintains an adequate performance in the view point of the human visual system, since the bound of the errors increases with the gray scale.
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