• 수도
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• 제23권1_2호통권76_77호
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• pp.20-37
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• 1996

• Journal of Preventive Medicine and Public Health
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• 제1권1호
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• pp.1-8
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• 1968

This paper describes the incidence of transport accident for the period, 1955-1965. Transport accidents were classified into three categories, viz. railway(WHO Classification of Diseases, E-802), watercraft (E 550-E 858) and motor vehicle accidents(E810-E835, E840-E841, E844-E845). Crude data on the subject were collected from the various souces of Government Statistical Books including Statistical Year Books edited by the Central Office of Economic Planning Board, Annual Police Reports by the Ministry of Home Affairs, and the national and local associations for road traffic safety. From the data incidence and mortality rates by year, month and local province were computed and other variables relevant to the epidemiology of accidents were observed. The following summary could be drawn: 1. Death rates due to transport accidents per 100,000 population were 12.3 for 1955 and 9.7 for 1965. The incidence of injury due to the same cause were 34.0 for 1955 and 35.9 for 1965. 2. Death rates by transportation vehicle showed 9.0 due to motor vehicle accidents, 1.7 due to water-crafts, and 1.6 due to railway trains for 1955. In 1965 death rates were 6.0 due to motor vehicles, 1.2 to water-crafts and 2.4 to railway. 3. Seasonal distribution of transport accidents revealed that car accidents occur more frequently in spring and fall fall seasons while ship accidents do in winter and train accidents more in summer. 4. Both car and ship accidents slightly decreased during the past decade, 1955-1965, whereas the accidents of railway trains showed a tendency of increase. 5. Although the survey on railway accidents excluded the injuries of passengers or railway employees corresponding to WHO classification of diseases, E 801, due to inaccuracy of data, it is roughly estimated that the same number of casualities as the incidence among pedestrians or any other than passengers or employees assumed to be at work(E 802).

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.156-157
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• 2015

The safety concern of slipping on floors in South Korea has come to the fore as a social problem, but the occurrence of such accidents has not decreased. Slip and fall accidents have several causes, but they are especially common when there is soapy water on the floor during a shower or a bath. Despite this situation, it can be said that there is a lack of standards on surface contamination materials used in floor slip resistance testing. Therefore, in this study, we conducted a survey to identify the components and quantity of soapy water that actually results from a user taking a shower, and the standardization of contamination materials. Based on the results of this experiment, we provide a surface contamination material that can replace the soapy water used in floor slip resistance testing.

• 한국환경과학회지
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• 제30권12호
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• pp.1005-1014
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• 2021

Organic contaminants can be released into water environments due to chemical accidents and exist as dissolved and non-aqueous phase liquids (NAPL). Fenton oxidation was tested for bisphenol A and nitrobenzene as model organic contaminants in dissolved and NAPL states. Fenton oxidation was successfully applied for both of the dissolved and NAPL states of the two pollutants and the results indicated that a quick treatment was needed to reduce the risk from a chemical accidents instead of carrying out oxidation after the contaminants dissolve in water. A set of Fenton reactions were tested under seawater conditions because chemical accidents often occurs in the ocean. Chloride ions act as radical scavengers and inhibit Fenton oxidation. The reaction rate is inversely proportional to salt contents and the reduced reaction rate can be compensated by increasing the quantity of the oxidizing agents. The current study showes that Fenton oxidation could be applied as a quick treatments for organic contaminant in dissolved and NAPL state organic contaminants released as a result of leaks or chemical accidents.

• 대한토목학회논문집
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• 제29권3B호
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• pp.221-230
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• 2009

국내 주요 상수 취수원은 동일한 하천 및 호수에 하수 처리장이 위치해 있어 처리 방출수로 인한 악영향을 받게 된다. 또한 하천을 따라 건설된 도로나 교량에서 발생하는 교통사고나 수질 오염사고로 인한 하천 내의 오염물 유입은 취수장 운영에 큰 어려움을 주게 된다. 특히 우리나라 주요 상수원에 해당하는 팔당호의 경우 호수면적에 비해 유역면적이 상당히 크기 때문에 다양한 수질 오염사고에 노출되어 있다. 따라서 사전에 발생 가능한 수질사고를 모의하고 이에 대한 대책을 모색하는 일이 매우 중요하다. 본 연구에서는 팔당호 주변에서 발생할 수 있는 수질 오염사고에 대한 수질모의를 수행하였다. 2차원 수치모형을 이용하여 사고로 유입된 오염물질의 혼합거동을 모의하였고, 팔당호에 위치한 주요 취수장에 미치는 영향을 분석하였다. 이를 위해서 2차원 흐름모형인 RMA-2를 이용하여 유속장을 모의하고, 이 결과를 2차원 하천수질 해석모형인 RAM4에 입력하여 오염물질의 시간에 따른 거동을 분석하였다. 갈수기 수질사고 발생시 저감방안으로써 남한강과 북한강의 유량증대에 따른 오염물질의 희석 및 수세 효과에 대해 분석하였다. 분석결과 유량증대에 따라 오염물질의 최대 농도는 더 높아지면서 더 빠르게 이동하는 현상을 관찰할 수 있었다. 따라서 오염물질이 주입된 지점에서의 초기 희석 효과보다는 빨라진 흐름에 의한 수세 효과가 훨씬 더 크게 나타난 것으로 판단된다. 이를 통해 독성 오염물질로 인한 수질사고 발생시 유량증대에 의한 수세 효과가 취수장 운영에 있어 유리한 대책이 될 수 있음을 확인할 수 있다.

• 한국유기농업학회지
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• 제19권spc호
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• pp.108-110
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• 2011

In order to evaluation of beneficial functions for organic farming, we have divided beneficial functions as 9 sub-functions such as flooding control, fostering water resources, purifying the air, mitigating summer climate, purifying water quality, decreasing soil erosion, accumulating soil carbon, conserving biodiversity, and preventing accidents from pesticides. And they were quantified by searching related repots and statistics, and surveying fields. Organic farming, especially organic paddy farming, showed that some functions like fostering water resources, accumulating soil carbon, conserving biodiversity, and preventing accidents from pesticides were higher than conventional paddy farming, while the others were almost similar. The fostering water resources function was evaluated as 4,297 ton $ha^{-1}\;year^{-1}$ to increase about 3.6% comparing with that of conventional farming. New function for accumulating soil carbon at organic paddy fields has been assessed by 4.67 ton $ha^{-1}$ in terms of long periods over 10 years. Considering area of organic paddy farming in Korea and value of carbon price, it was evaluated monetary value as 22.4 to 84.1 billion won using replaced method. It could be also evaluated that flooding control, fostering water resources, purifying the air, mitigating summer climate, purifying water quality, decreasing soil erosion, and preventing accidents from pesticides were 2,980, 123.4, 482.6, 87.5, 0.9, 55.6, and 284.1 billion won, respectively. Conserving biodiversity function would be very big at organic farming though it couldn't be evaluated as monetary value.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.317-321
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• 2022

'19년 인천시 수돗물 적수 사고 발생에 따라 환경부에서는 수도운영관리 고도화, 체계적인 기술지원 및 사고대응을 위해 「수돗물 안전관리 종합대책」을 수립하여 수돗물 공급 전 과정의 스마트 상수도 관리체계를 구축 중이다. 수도사고 위기대응 고도화를 위해서는 유량, 압력, 수위 등 실시간 수도운영 데이터의 신뢰성 확보와 더불어 빅데이터 분석기법을 활용한 사전 경보 알고리즘 개발 및 적용이 필수적이다. 본 논문에서는 수도운영 데이터 주요항목(유량, 압력, 수위 등)에 대한 데이터 기반의 다양한 통계기법을 활용해 최적 운영범위 선정, 감시경보체계 고도화를 위한 기반을 마련하고, 분석 결과를 K-water 운영시스템 및 감시경보시스템과의 연계를 위한 시스템 모델링에 대해 연구한다. 또한, 취수장과 정수장 간원수 탁도의 변화에 대한 교차 상관분석을 통해 도달시간 등에 대해 고찰하고, 취수장 펌프 가동에 따른 유량 변화 및 시간 지연을 고려한 원수 탁도 데이터를 적용하여 정수장 원수 탁도를 예측하는 모델에 관해 연구하고자 한다.

• Journal of Electrical Engineering and Technology
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• 제7권2호
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• pp.230-235
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• 2012

Cases of insulation breakdown damage of water-cooled generator stator windings occur frequently due to coolant leakage and water absorption worldwide. Such serious accidents may cause not only enormous economic loss but also very serious grid accidents in terms of stable supply of electric power. More than 50 % of domestic generators have been operated for more than 15 years, and leak and water absorption problem of windings are often found during the planned preventive maintenance period. Since 2005, leak and water absorption tests have been performed for total watercooled stator windings after fully drying the inside of the windings. The results are then comprehensively analyzed. The result of the test performed by GE, a foreign manufacturer, for 141 generators showed failures in 80 of them (failure rate: 57 %), whereas in the tests carried out in Korean domestic power plants, only 14 out of 50 generators showed failures (failure rate: 28 %).

• 한국안전학회지
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• 제33권6호
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• pp.22-27
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• 2018

Fire fighters are exposed to the risk of many accidents during fire suppression, especially near the high voltage circuit. In order to prevent and analyze the electric shock accidents, measurement of water resistance is crucial. However, this has been one of the overlooked research areas and it has been very difficult to measure the mixed up resistance components separately. In this paper, we measured a total resistance of apparatus and regarded it as a serial resistance of contact resistance and length dependant resistance. Measuring the resistance by varying the length of water stream, the variable resistance and fixed contact resistance appear, which are used to calculate the both components of resistances. In addition, the resistance of fire hose can be calculated from the parallel circuit which is formed by grounding the fire hose with the resistance of water stream. Results show that we can successfully measure the resistance per unit length of water stream and fire hose, thereby proving that this method is a facile way to measure water and fire hose resistance. However, many experiments are still required to obtain the precise contact resistance of ground under various condition and the resistance between the human body and fire hose.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(1)
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• pp.252-252
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• 2005