• Title/Summary/Keyword: Active fire

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Smoke Density and Operation of Fire Detector Influenced by Air Stream (기류순환이 연기농도와 감지기 작동에 미치는 영향)

  • 이복영;이병곤
    • Fire Science and Engineering
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    • v.16 no.4
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    • pp.28-32
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    • 2002
  • The performance based design in fire detection system, the effect of high airflow and dilution of smoke produced in any fire situation serve to increase the response time of point-type smoke detectors. This study investigated the smoke density of ceiling, under the air stream and in normal status when fire type is smoldering fires. The result of study, smoke generated in the fire was swept away from nearby spot type smoke detector which failed to actuate because dispersed in diluted form around the room. The concept of performance based design in fire detection system of protected area influenced by high airflow provided the need of active fire detection system such as air sampling smoke detection system.

Active Fire Detection Using Landsat 8 OLI Images: A Case of 2019 Australia Fires (Landsat 8 OLI 영상을 이용한 산불탐지: 2019년 호주 산불을 사례로)

  • Kim, Nari;Lee, Yangwon
    • Korean Journal of Remote Sensing
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    • v.36 no.5_1
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    • pp.775-784
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    • 2020
  • Recent global warming and anthropogenic activities have caused more frequent and massive wildfires with longer durations and more significant damages. MODIS has been monitoring global wildfires for almost 20 years, and GK2A and Himawari-8 are observing the wildfires in East Asia 144 times a day. However, the spatial resolution of 1 to 2 km is not sufficient for the detection of small and medium-size active fires, and therefore the studies on the active fire detection using high-resolution images are essential. However, there is no official product for the high-resolution active fire detection. Hence, we implemented the active fire detection algorithm of Landsat 8 and carried out a high-resolution-based detection of active fires in Australia in 2019, followed by the comparisons with the products of Himawari-8 and MODIS. Regarding the intense fires, the three satellites showed similar results, whereas the weak igniting and extinguishing fires or the fires in narrow areas were detected by only Landsat 8 with a 30m resolution. Small-sized fires, which are the majority in Korea, can be detected by the high-resolution satellites such as Landsat 8, Sentinel-2, Kompsat-3A, and the forthcoming Kompsat-7. Also, a comprehensive analysis together with the geostationary satellites in East Asia such as GK2A, Himawari-8, and Fengyun-3 will help the interoperability and the improvement of spatial and temporal resolutions.

Biological Control Potential of Penicillium brasilianum against Fire Blight Disease

  • Kim, Yeong Seok;Ngo, Men Thi;Kim, Bomin;Han, Jae Woo;Song, Jaekyeong;Park, Myung Soo;Choi, Gyung Ja;Kim, Hun
    • The Plant Pathology Journal
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    • v.38 no.5
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    • pp.461-471
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    • 2022
  • Erwinia amylovora is a causative pathogen of fire blight disease, affecting apple, pear, and other rosaceous plants. Currently, management of fire blight relies on cultural and chemical practices, whereas it has been known that few biological resources exhibit disease control efficacy against the fire blight. In the current study, we found that an SFC20201208-M01 fungal isolate exhibits antibacterial activity against E. amylovora TS3128, and the isolate was identified as a Penicillium brasilianum based on the 𝛽-tubulin (BenA) gene sequence. To identify active compounds from the P. brasilianum culture, the culture filtrate was partitioned with ethyl acetate and n-butanol sequentially. From the ethyl acetate layer, we identified two new compounds (compounds 3-4) and two known compounds (compounds 1-2) based on spectroscopic analyses and comparison with literature data. Of these active compounds, penicillic acid (1) exhibited promising antibacterial activity against E. amylovora TS3128 with a minimal inhibitory concentration value of 25 ㎍/ml. When culture filtrate and penicillic acid (125 ㎍/ml) were applied onto Chinese pearleaf crab apple seedlings prior to inoculation of E. amylovora TS3128, the development of fire blight disease was effectively suppressed in the treated plants. Our results provide new insight into the biocontrol potential of P. brasilianum SFC20201208-M01 with an active ingredient to control fire blight.

Application Studies for Active Fire Monitoring over Korea Using MODIS Direct Broadcast Data

  • Song J.H.;Kim Y.S.
    • Proceedings of the KSRS Conference
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    • 2004.10a
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    • pp.410-414
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    • 2004
  • The MODIS Land Rapid Response System (RRS) has been developed to provide rapid access to MODIS data globally, with initial emphasis on 250 m color composite imagery and active fire data. Fire detection is based on a contextual algorithm that exploits the strong emission of mid-infrared radiation from fires. This algorithm examines each pixel of the MODIS swath, and ultimately assigns to each one of the following classes: missing data, cloud, water, non-fire, fire, or unknown. In this paper, we introduce the MODIS Rapid Response System established at the Korea Aerospace Research Institute (KARI) and present some application results for Korea using the direct broadcast data acquired at KARI ground station.

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LATEST INTERNATIONAL DEVELOPMENTS IN PASSIVE FIRE PROTECTION

  • Marx, Olliver
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 1997.11a
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    • pp.227-243
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    • 1997
  • Fire and smoke can from a small ignition source develop rapidly. Active systems in combination with Passive Fire Protection measures will offer highest safety standards to the building's developers and occupants. Nevertheless, the fire growth is very unpredictable and it is therefore essential at the planning stage that tested solutions are well selected according to National codes and later on installed by qualified contractors to ensure optimum performance. This demonstrates that Passive Fire Protection as safety measure cannot be neglected. Recent fire cases all over the world still proof that fire can develop any time and any where even in countries of high safety standards.

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A Study on an Improvement of the Fire-Protection System Category under the Enforcement of Housing Performance Rating System (주택 성능등급 표시제도 시행에 따른 소방시설 항목 개선에 관한 연구)

  • Lee, Su-Kyung;Lee, Dong-Yong;Hong, Dae-Hwa
    • Fire Science and Engineering
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    • v.24 no.2
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    • pp.126-132
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    • 2010
  • The Housing Performance Rating System, enacted on 9 January 2006, an active measure containing provisions on improved quality and advanced performance of the Fire-Protection System for equalized ability to secure safety of life to some extent, is a desirable policy in fire-safety regard. The study of theoretical background of each performance rating section for the purpose of active and wide application of The Fire-Protection System category of the Housing Performance Rating System currently in effect internally. In accordance with the result of the study, the reform measures for the currently detailed evaluation criteria have been suggested to improve the performance of the Fire-Protection area of The Housing Performance Rating System currently being in force based on the assumption of prior settlement of the following; upward settlement of the point distribution standards on the performance ratings of each head backed up by an institutional Government policy with overriding priority; and urgently enacted Fire-Protection related laws and regulations.

The Active Measure of the Operation of the Volunteer Fire Brigade in Korea (우리나라 의용소방대의 활성화 방안 고찰)

  • Jeong, Gi-Sung
    • Fire Science and Engineering
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    • v.23 no.5
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    • pp.138-142
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    • 2009
  • The system of The Volunteer Fire Brigade is the Civil autonomic one which was set up from The Chosun Dynasty and has been active. Having suffered from several dificulties from Japanese control in the Chosun Dynasty, The Volunteer Fire Brigade was established by the enactment 1958 Fire Law and we have had it up to this time. The Volunteer Fire brigade played an important role in the period of the past Fire fighting personnel and equipment which we did not have. It has carried out the assistance of the Fire extinction, the early extinction of a fire in the rural region, the extinction of the forest fire, and lots of social volunteering actions etc. but, today's Fire fighting system has made the surprising developments, such as the improvement of national economic power, the increase of knowledge about the safety of the people, the openness of The Fire Fighting Department of Korea. I will try to check out the role of The Volunteer Fire Brigade which filled up the lacking part the fire fighting in the past and make the measures which can activate in these days, looking for the new field of the movement.

Fire Detection System Using Arduino Sensor

  • Cheong, Ha-Young
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.9 no.6
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    • pp.624-629
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    • 2016
  • Recently various types of disaster monitoring system using smart-phones are under active studying. In this paper, we propose a system that automatically performs the disaster and fire detection. Additionally we implement the Arduino-based smart image sensor system in the web platform. When a fire is detected, an SMS is sent to the Fire and Disaster Management Agency. In order to improve fire detection probability, we proposed a smart Arduino fire detection sensor simulation which searches the smart sensor inference algorithm using fuzzy rules.

Introduction of Fire Protection Technology and Its Design Method of Offshore Facilities (해양플랜트의 방화대책 및 설계기술 소개)

  • Koo, Myeong Jun;Choi, Jae Woong;Yoon, Ho Byung
    • Transactions of the KSME C: Technology and Education
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    • v.1 no.1
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    • pp.49-57
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    • 2013
  • The dimensioning accidental loads have been selected through suitable quantitative risk assessment and generally utilized important factors for offshore facility design. The fire hazard can be quantified with dimensioning fire loads. The main purposes of fire protection are to maintain the functionality of safety systems within evacuation period and to prevent the escalation from initial fire to uncontrolled catastrophic fire. This paper introduces the applications and the design methods of active and passive fire protections as representative measures of fire protection of offshore facilities. The passive fire protection requires the high initial installation cost and much difficulty on the operation of facilities and their maintenance. The oil major clients have asked the design contractors of offshore facilities to optimize the amount of passive fire protection with relevant engineering technology recently.