• Korean journal of applied entomology
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• v.26 no.3 s.72
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• pp.117-122
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• 1987

Insect visitors of peach and plum blossoms and their activities were observed from Apr. 1 to Apr. 30, 1987 in the orchard of Gyeongsang National University, Jinju, Gyeongnam. A total of 22 species of 22 genera from 18 families and 4 orders, and 20 species of 20 genera from 14 families and 4 orders were collected on peach and plum blossoms, respectively. The most number of insects visited flowers around 11 a.m. or around 2 p.m., depending on weather. Most of the species and numbers were collected at the time of 80%-blooming in peach tree but no distinct trend was observed in plum tree.

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2003.04a
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• pp.63-63
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• 2003

서양뒤영벌(Bombus terrestis)과 꿀벌(Apis melltfera)의 시설참외에서 화분 매개특성을 조사한 결과, 봉종별 방화활동에서 서양뒤영벌 일벌은 10시, 서양뒤영벌 수벌과 꿀벌은 12시에 방화활동 정점에 도달하였다. 암꽃 선호시간은 서양뒤영벌 일벌, 꿀벌 그리고 서양뒤영벌 수벌은 각각 10시, 12시 그리고 14-16시에 가장 높았다. 봉군 투입 후 서양뒤영벌 일벌과 꿀벌은 각각 2일과 5일째부터 정상적인 방화활동을 시작하여 24일간 정상적인 활동을 하였으나 서양뒤영벌 수벌은 3차례의 심한 기복이 있는 불안정한 방화활동을 보였다. (중략)

• Journal of Korean Institute of Fire Investigation
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• v.9 no.1
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• pp.61-64
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• 2006

지난 2005년 8월 18일 대전광역시 중구 문화동 가옥에서 발생한 화재를 사례로 하여 현재 발생되고 있는 보험범죄의 잔인하고 반인륜적인 모델을 제시하였다. 동 사례는 일가족 4명이 화재로 인하여 사망하였으며, 초기에는 전기누전에 의한 단순한 화재로 오인되었으나, 현장의 정밀감정, 소사체의 정밀 부검 및 면밀한 수사를 통하여 보험금을 노린 살인 방화사건으로 밝혀진 사례이다. 본 고찰에서는 화재현장의 상황, 가옥 내부의 연소형태, 전기적인 특이점, 연소매개체, 피의자의 행위, 연소지연시간의 발생 및 수사 자료를 근거로 제시하고, 종합적으로 고찰하여 일가족 4명을 살해한 후, 시너를 연소매개체로 사용한 방화에 의해 화재가 발생한 것으로 판단한 사례이다.

• Fire Science and Engineering
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• v.25 no.3
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• pp.28-41
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• 2011

Regulation of Escape and fire-prevention of Building of South Korea were enacted as a part of building codes in 1962. Since it was enacted, the law has gone through many changes. In this study, evaluated the fire safety of the law about the case of a hotel that the fire risk are expected to be higher whenever it was changed. As a result, the current law has gotten better in tire safety since it was enacted. However, especially it could be confirmed that the evacuation safety is insufficient in the lower level of hotel building. In the case of accommodation, because the occupants become aware of fire lately, they have not enough time to escape. Therefore, this study suggests that it is needed to come up with an effective counterplan about the interior finish materials, fire door and fire compartments that the smoke layer descending time is longer.

• Journal of the Korea institute for structural maintenance and inspection
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• v.19 no.1
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• pp.120-127
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• 2015

The purpose of this study is to improve the fire prevention performance using the fire venetian blind louver subjected to burning by fire flame. The investigation is based on testing 2 full scale specimens, which is $3m{\times}3m$ module, $850mm{\times}1,500mm$ open, and $900mm{\times}900mm{\times}175mm$ venetian blind louver. Two louver thickness (1.5 and 2.0mm) were adopted. The specimens were exposed to fire flame temperature levels of ISO834 at the lower surface of the fire venetian blind louver specimens with exposure duration of one hour in Korea Institute of Construction Technology (KICT). It was found from the test results that the values of distributed temperature, decreased for all specimens for protecting to fire flame by venetian blind louver. The results of tests were a good fire prevention performance between in initial to 6 mins. At 60 minutes around ISO 834 fire loading, the percentages of distributed temperature in 500mm and 800mm height ranged between 11 and 10% respectively, regardless of louver thickness. This study, therefore, will improve the fire venetian blind louver for fire protection and prevention performance.

• Fire Science and Engineering
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• v.32 no.1
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• pp.57-65
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• 2018

In this study, a post-fire safe shutdown analysis (PFSSA) including multiple spurious operation (MSO) treatments for cables was conducted with an imaginary nuclear power plant for training using a deterministic fire analysis code. The imaginary nuclear power plant for the training consisted of a reactor containment building and an auxiliary building, including a total of 22 fire areas. The equipment including valves, pumps, emergency diesel generators, switch gears, motor control centers, and logic controllers were located in each fire area of the imaginary plant. It was assumed that each equipment is connected with two cables and that each cable passes through the fire areas along the cable trays. A database containing the information on the equipment and cables for the imaginary plant was constructed for the fire area analysis. The fire area analysis was performed for several assumed MSO scenarios, equipment logics, and cable logics. A mitigation measure using a three hour rated wrap was applied to the failed cables and cable trays after the fire area analysis.

• Fire Science and Engineering
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• v.25 no.4
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• pp.1-7
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• 2011

Recently the interest in disaster prevention on super tall buildings is increasing. Especially in fire, against increasing of evacuation time due to high-rise, It is being tried to minimize the fire spread in building. Fire compartments using the fire-resistant wall and door, typical method to control the fire spread in buildings, delay the fire spread to other compartments and consequently evacuation time increases. But the existing provisions adjure only 2-hour fire resistance with maximum limit regardless of the super tall buildings, so this is a obstacle for research and development of the fire resistance wall in super tall buildings. In this study, we reviewed the fire resistance ratings of the wall, and presented the development directions for the fire resistance wall in super tall buildings considering fire resistance, construction and application of the wall.

• Fire Science and Engineering
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• v.34 no.2
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• pp.156-165
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• 2020

In this paper, the application of evacuation delay time (Cognition time + initiation time) and examine the degree of opening of fire doors in households for evaluating evacuation safety and suggest a realistic alternative. In order to proceed with this study, first of all, the preliminary investigation on evacuation safety evacuation of residential-type buildings (Apartment, urban living houses, etc.) among the performance-oriented design targets of Gwangju Metropolitan City, which was implemented until June 2018. Then, for the two representative types that are commonly used among the previously surveyed buildings, evacuation delay time is applied to W1, W2, and respectively simulating the opening of the doors is applied to th full open, 1/4 open, the leakage gap and evacuation safety evaluation was performed. As a result of evaluating evacuation safety was found that it is difficult to secure evacuation safety regardless of evacuation delay time W1 and W2 when the fire door is fully open and 1/4 open, Only when the leakage gap is applied evacuation safety was ensured even if evacuation delay time W2 was applied. Therefore, when a residential building is subject to performance-oriented design, evaluating the application of W2 rather than W1 is considered for evacuation delay time to reflect concern about privacy infringement due to CCTV installation, etc. In order to secure the Smoke blocking performance of the fire door and to improve the performance-oriented design, I would like to propose to consider the method of applying a leak gap to the degree of opening of the fire door. Through this, it is expected that the performance-oriented design will be a step further by performing evacuation safety evaluation with more realistic data.

• Journal of Korean Institute of Fire Investigation
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• v.7 no.1
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• pp.49-54
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• 2005

본 실험은 방화 사건 현장에서 지연 착화 재료로 쓰이는 양초의 연소 시간을 측정키 위해 실험을 수행하였고, 시중에서 판매되는 양초는 종류, 크기, 제조사별 모두 다른 연소 시간을 나타나는 결과를 확인하여 양초에 대한 일괄적인 연소량, 시간에 비례되는 공통적인 자료를 도출할 수 없다는 결론을 얻었다. 사건 현장에서 지연 착화의 재료로 사용한 양초가 발견된다면 그 양초를 시료로 한 현장의 분위기를 조건으로 연소실험을 통하여 연소량에 비례하는 시간 측정결과로 착화 시간을 추정해야 하다는 결론을 얻었다.

• Annual Conference of KIPS
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• 2005.11a
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• pp.619-622
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• 2005

본 논문은 최근의 네트웍 장비의 기본적인 기능인 stateful inspection 을 지원하기 위해 생성되는 세션 테이블들의 구조와 그 효율성을 확인한다. 그를 위해 LINUX, FreeBSD, OpenBSD 등의 운영체제에서 사용되고 있는 방화벽 소프트웨어들의 세션 테이블 구조 및 특징을 확인하고 실제 실험을 통해 구조적 특징 및 트래픽의 지역성이 테이블의 탐색에 걸리는 오버헤드를 줄이는 데에 어떠한 영향을 미치는지 실제 실험하였으며, 트리 구조를 가지는 세션 테이블이 worst case 시의 테이블 탐색시간을 줄여줌으로써 전체적인 패킷 처리시간을 줄여줄 수 있는 구조임을 확인한다.