• Title/Summary/Keyword: Spot fire

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The Cause of Fire from Incomplete Electric Contact and Identifying It (불완전 접촉에 의한 발화원인 및 식별방법에 관한 연구)

  • Choi, S.B.
    • Journal of Korean Institute of Fire Investigation
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    • v.11 no.1
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    • pp.9-22
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    • 2008
  • We identified objectively the ignition spot of real fire scene and electrical machinery and appliances in sections which were acted for fire cause. By pointing out the actual condition of dealing electronic devices and researching the way of solution, I will presents the fundamental materials which will help to prevent recurrence.

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A Study on the Development of Standardization Tester for the Field Inspection of the Rate of Rise Spot Type Heat Detector (차동식스포트형열감지기 현장점검용 표준화기기 개발에 관한 연구)

  • Kim, Shi-Kuk;Yuk, Hyun-Dai;Yang, Seung-Hyun;Jee, Seung-Wook;Lee, Chun-Ha
    • Fire Science and Engineering
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    • v.23 no.3
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    • pp.85-92
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    • 2009
  • This paper studied on the development of standardization tester for the field inspection of the rate of rise spot type heat detector. It was to find the problems of the 4 type's testers such as A type (electric bulb type), B type (halogen lamp type), C type (heating coil type), D type (fumigator type) which were used to check of the rate of rise spot type heat detector in inspection for the fire protection. To identify those problems, this paper described about the development of standardization tester for the field inspection of the rate of rise spot type heat detector and that have the function of auto setting temperature more $30^{\circ}C$ higher than room temperature and keep the constant temperature. And keep the constant wind velocity of 85cm/sec. Performance verification results of the developed prototype that had same conditions such as the sensitivity test conditions at the type approval of the rate of rise spot type heat detector.

A Study of the Rate of Rise Spot Type Heat Detector on the Artificially Accelerated Aging Characteristics (차동식 스포트형 열감지기의 인공 가속열화특성에 관한 연구)

  • Kim, Chan-Young
    • Fire Science and Engineering
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    • v.25 no.2
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    • pp.107-113
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    • 2011
  • This paper presents the results of artificially accelerated aging characteristics of the rate of rise spot type heat detectors. This experiment carried out to investigate the detector's operating characteristics when a fire was broken out or the regular tests were performed. The result showed that the delay of operating time or no-operation of heat detector which was made by company B and used in the field for 5 years may be occurred even at the $100^{\circ}C$. This result is due to the leakage of inflated air from heat chamber. However the operating display LED was not out of order, even if the temperature was increased up to $160^{\circ}C$.

Grassfire Spot Matching Method for multi-seed matched spot pair (다중 발화점을 이용한 Grassfire 스팟매칭 기법)

  • Ryoo, Yun-Kyoo
    • Journal of the Korea society of information convergence
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    • v.7 no.2
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    • pp.59-65
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    • 2014
  • Grassfire spot matching method is based on similarity comparison of topological patterns for neighbor spots. This is a method where spot matching is performed as if fire spreads all around on grass. Spot matching starts from a seed spot pair confirmed as a matched pair of spots and spot matching spreads to the direction where the best matching result is produced. In this paper, it is a bit complicated way of grassfire method where multi-seed matched spot pair are manually selected and spot matching is performed from each multi-seed matched spot pair. The proposed method shows better performance in detection rate and accuracy than that of the previous method.

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Bibliographical Study on Liver Spot (肝斑에 關한 文獻的 考察)

  • Nam, Hae-Jeong;Chae, Byung-Yoon
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.9 no.1
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    • pp.16-24
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    • 1996
  • In order to satisfy the demand of good treatment of Oriental medicine, I investigated many books mentioned about Liver spot. The results were as follows: 1. They have called the Liver spot many other terms in the oriental medicine. 2.. The Liver spot is facial disease, so it is deeply related with yang-myong kyong(陽明經) 3. As the external cause of the Liver spot, wind and fire evil have been emphasized. 4. Intoxication of bud of banha(半夏) poison and alcohol absorption can be one of the causes. 5. As the internal cause of the Liver spot, each other vapour asthenia fever from constipation seven modes of emotion, asthenia of the spleen and stomach and insufficiency of kidney-yin(腎陰) 6. Nowadays, the deficiency of kidney-yang(腎陽) is also included as the cause of the Liver spot. 7. Many oriental doctors have talked about the relationship between the Liver spot and women, but I can't find any concrete talking about the relationship between menstration and the Liver spot, pregnancy and the Liver spot. 8. They have administrated many other herb medicines for the treatment the Liver spot.

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Spatial Clustering Analysis of Fire in Gangwon-Do (강원도 화재의 공간적 군집 특성 분석)

  • BAE, Sun-Hak
    • Journal of the Korean Association of Geographic Information Studies
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    • v.21 no.3
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    • pp.93-103
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    • 2018
  • The purpose of this study is to analyze the spatial cluster characteristics of fire using long-term fire data. For this, fire data which were broke out in the last 40 years were converted into GIS data and spatial analysis was performed at Gangwon-do province's minimum administrative district level. In order to grasp the spatial distribution of the fire, Moran's I, Geary's Ci and Getis-Ord's Gi*, which are methods that analyze the local indicators of spatial association(LISA), were used. By integrating the characteristics of the spatial distribution of fire by integrating the results obtained from each analysis, the advantages of the individual analysis methods were reflected in the study results. As a result of the study, hotspot areas of fire in Gangwon-do was derived out. Among the hot spot areas, some areas, where the fire frequency is higher than the adjacent areas, have been identified. The results of this study can be used as information for predicting the fire hazard area and relocating of fire-fighting facilities in the study area.

Study on the Operation Characteristics of Heat Detectors through Fire and Wind Tunnel Experiment (풍동실험과 화재실험을 통한 열감지기의 동작특성에 관한 연구)

  • Ryu, Hocheol;Kim, Doohyun
    • Journal of the Society of Disaster Information
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    • v.11 no.2
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    • pp.203-209
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    • 2015
  • The heat detector detects heat in the fire and is an important core element of the automatic fire alarm system used generally for every fire prevention objects. The heat detector is distinguished in spot type and spread type and in spot type, there are differential and thermistor types. These heat detectors give a great influence on the loss of people and property according to the sensitivity of response such as operation time and operation temperature in actual fire and in overseas people apply it for the development of products that can be operated in the early stage of fire including certification, quality management, and comparison standard by introducing response time index through the theory of heat balance that considers the heat loss and ventilation tests. In Korea, the response time index is introduced and used in the head of sprinkler products, but it is not applied to the heat detector at present. It is necessary to introduce the response time index that shows the sensitivity of response of the heat detector the installation standard for the heat detector that the response time index is applied should be different according to the fire weight, danger degree of fire, and shape of buildings. Through this study, it tries to help reduce lives and property of people through the swift warning by installing detectors suitable for the building structure.

Strength Characteristic and Phenomenon of Heated Concrete by High Temperature (고온가열 콘크리트의 강도 특성과 현상)

  • 태순호;이병곤
    • Journal of the Korean Society of Safety
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    • v.12 no.3
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    • pp.132-138
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    • 1997
  • For many years concrete has been the major building material for most construction. It is of primary importance that fire fighters or fire investigators have a full understanding of the properties of concrete so that better control of the fire scene is achieved. This, in turn, not only help to ensure a safer fire-fighting job but also a more successful fire investigation. So far as the fire scene investigation in concerned, knowledge about the thermal behaviour of concrete can help the investigators to determine the highest temperature that a particular spot of a fire scene has ever reached thereby providing data which may be of value in reconstructing the course of the fire.

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A Study on Developing the Educational Program for the Emergency Response against Fire Accidents in KTX (고속철도 화재사고 비상대응 교육프로그램 개발에 관한 연구)

  • Kim, Si-Gon;Park, Min-Kyu
    • Journal of the Korea Safety Management & Science
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    • v.11 no.2
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    • pp.41-49
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    • 2009
  • In January, 2005, the "Railroad Safety Act" was presented, preparing the systematic equipment that allows several railroad operators to consider the railroad safety issue, and each of the railroad operative institutions accepted such situation that the construction of the emergent system of coping, resulting in the construction of the emergent system of coping with the railroad fire accident through the relevant study to improve the railroad security efficiency against fire. This study tried to present the on developing the emergent educational program for coping with the KTX fire accident, which is distributed to the spot, to the railroad emergency staff for improving the railroad security efficiency against fire through the education of systematic and efficient emergent countermeasure procedures against fire accidents the fire accident in KTX.