• 한국산업보건학회지
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• 제30권1호
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• pp.50-57
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• 2020

Objectives: Methyl bromide is a highly toxic substance that can cause systemic poisoning, neurotoxicity, pulmonary edema. Methyl bromide is a widespread fumigation agent used for import and export quarantine, but there is little data on exposure assessment of workers participating in such fumigation. Therefore, this study aims to investigate the exposure level of methyl bromide among workers and the concentration distribution of methyl bromide in the workplace during fumigation. Methods: For this study, one wood tent and one container fumigation area in Pusan, and one wood tent fumigation area in Incheon were investigated over three months from June 2001. Results: Methyl bromide exposure levels for container fumigation workers were from undetected to 1.86 ppm and from undetected to 2.28 ppm for tent fumigation workers as an 8 hr TWA. After opening the container door, the methyl bromide concentration in the container decreased rapidly over time, but the concentration remained over 1 ppm even after about one hour. The concentrations around the tent during its removal were highly affected by wind, but were detected in a range from undetected to 11.97 ppm. Conclusions: This study confirmed that both container and tent fumigation caused workers to exceed the exposure limit of 1 ppm as an 8 hour TWA. In particular, it could be confirmed that a situation exists in which the worker may be exposed to high concentrations of methyl bromide when opening the container or removing the tent due to the nature of the work. Therefore, it is very important to improve working methods and to wear appropriate personal protective equipment.

• 한국재난정보학회 논문집
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• 제18권2호
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• pp.241-251
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• 2022

연구목적: 고층 건물 화재시 제연구역이 효과적으로 보호되지 않으면 수직피난경로에 연기나 화염이 유입되어 대피가 어려워진다. 국가화재안전기준에서는 제연구역에 차압 및 방연풍속을 공급하여 능동적으로 연기 유입을 억제하고, 제연구역으로부터 옥내로 유입되는 공기는 옥외로 배출되도록 하고 있다. 본 연구는 유입 공기의 배출로 인한 문제점을 확인하고 성능개선 방안에 대하여 알아보고자 하였다. 연구방법: CONTAM 프로그램을 사용하여 기본조건과 변경조건으로 시뮬레이션을 수행하였다. 연구결과: 밀폐된 복도에서 유입 공기가 배출되면 제연구역에서 과압이 발생하여 개방력을 초과하였고 유입공기가 배출되지 않는 층 에서는 방연풍속이 미달하였다. 결론: "차압 배출댐퍼" 적용, 배출댐퍼 2개층 동시 개방, 복도와 옥외 사이 자동식 창문 설치로 유입공기의 배출 성능이 개선되었다.

• 한국재난정보학회 논문집
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• 제19권3호
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• pp.665-672
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• 2023

연구목적: 지하공동구는 도시 지하에 전기, 수도, 가스 등의 인프라를 공동 수용하는 시설로 공기 흐름이 부족하여 계절에 상관없이 결로가 자주 발생한다. 결로는 전기 설비의 누전 화재를 일으키는 원인이 되므로 지하공동구 내의 조명 등 각종 시설물 관리를 위해 필요한 제어반은 결로에 노출되지 않도록 문이 닫힌 상태로 관리되어야 한다. 본 논문에서는 딥러닝 객체인식 기술을 활용하여 수km 거리에 반복 배치된 공동구 제어반의 문 열림 여부를 이동 카메라 조건과 조명이 꺼진 조건에서도 인식하고자 한다. 연구방법: 지하공동구를 순찰하는 로봇이 촬영한 영상데이터를 이용하여 딥러닝 객체인식 모델인 YOLO를 모자이크 이미지 증강기법으로 학습시켜 제어반 문 열림과 문 닫힘을 인식한다. 연구결과: 모자이크 이미지 증강기법으로 학습시킨 모델과 사용하지 않은 모델의 성능을 비교한 결과, 모자이크 학습 모델이 더 우수한 성능(모든 클래스에 대한 mAP가 0.994 이상임)을 보이는 것을 확인하였다. 결론: 지하공동구의 조명이 꺼진 상태에서도, 공동구 내부 시설물이 복잡한 환경에서도 제어반의 문열림 여부를 우수한 성능으로 인식하여 지하공동구 재난안전관리에 도움이 될 것으로 기대된다.

• 한국주거학회논문집
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• 제19권4호
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• pp.97-105
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• 2008

The purposes of this study were to determine the actual state of the indoor thermal environment in apartment units and to analyze the relationship between the living factors and indoor thermal elements. The field surveys consisted of measurements of physical elements and observations of living factors. In addition, the residents of 20 apartment units were interviewed to survey their subjective response. Field surveys were carried out from January to March 2007. Measuring elements were air temperature, globe temperature, and relative humidity. The results showed that the average of indoor temperature for the houses was $21.2{\sim}27.2^{\circ}C$, while 4 houses exceeded the comfort zone. The average of globe temperature for the houses was $21.3{\sim}27.5^{\circ}C$, while 6 houses exceeded the comfort zone. The mean relative humidity was $19.5{\sim}58.8%$, which is a relatively dry condition. The residents' average clothing value was $0.39{\sim}0.89$ clo(average 0.68 clo). The average thermal sensation vote on each room was $4.2{\sim}4.8$, which is 'neutral' to 'slightly warm'. Living factors had significant effect on indoor temperature in regression analysis were ventilation time(outdoor air exchange), opening time of door through balcony, and gas cooker use time.

• 한국주거학회논문집
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• 제20권1호
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• pp.37-44
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• 2009

Sleep has big influence on our life, for example productivity, character formation of babies, mortality and the people who suffered from sleep problem are also diverse. Therefore, indoor environmental supports for good sleep, might be different with the situation and need of respective person. The objectives of this study are: 1) to investigate the current bedroom condition, sleep problem, and life pattern of Korean. 2) to classify Korean into several groups and explain their characteristics relevant to sleep, in order to understand Korean's need for good sleep. The questionnaire was sent out to Seoul and its environs in Jan.$\sim$Feb. 2008, and total of 702 questionnaires were collected. The research on the bedroom condition was conducted around perceived influence of environmental factors, opening and closing of the door, cooling and heating strategy, clo value during sleep, bedding type, lighting, sharing bedroom. People are divided into 6 groups by 8 factors, and 5 groups could be seen that they need some management for good sleep because of their sleep problem.

• KIEAE Journal
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• 제8권5호
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• pp.3-10
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• 2008

The Korean traditional architecture has developed by adapting to the natural environment, and has successfully created a comfortable indoor settings by using the surrounding natural resources. This is reflected in the building layout, space design and even materials. Our traditional wooden windows adjusting ambient temperature and humidity have both the functions of window and door, although they are clearly divided in the West. The opening and closing method of our traditional windows is similar and their dimensions are shown not to be standardized but diverse in terms of the characteristic of wooden furniture and that of components placed between columns. Thus this study aims to research the sound insulation and absorption performance of traditional windows to be varied with thickness, finishing method of window paper and thickness of air layer. Despite increase of the thickness of window paper, sound absorption was reduced, and the same result was shown when both sides of the structure were finished with thick window paper. The sound insulation performance of the windows could be evaluated to be inappropriate with $R_w$ 0 ~ $R_w$ 14.

• 한국정보통신학회논문지
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• 제16권1호
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• pp.98-106
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• 2012

컨테이너 보안 장치(CSD)는 컨테이너의 문 안에 장착되어 센서를 통해 컨테이너의 문이 비정상적으로 열리는 것을 탐지하는 장치다. 이러한 CSD 장치는 컨테이너의 보안성을 제공하는 장치이기 때문에 도청이나 위조와 같은 공격에 안전해야할 뿐만 아니라 복제 되어서도 안된다. 만약 복제된 CSD를 탐지할 수 없다면, CSD는 공격자에 의해 불법적으로 복제되어 정상적인 목적과는 다른 용도로 사용되어 질 수 있다. 본 논문에서는 이러한 복제된 CSD를 탐지하기 위한 정책 기반 복제 탐지 메커니즘을 제안한다. 또한 실제 구현 결과를 통해 제안하는 기법을 검증 및 평가한다.

• 건축역사연구
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• 제24권6호
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• pp.35-44
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• 2015

The purpose of this study is to critically investigate the ways in which scholars and architects in Korea have theorised the tradition in Korean architecture from the early 20th century to the present. After opening the door to foreign powers, the most important issue to be resolved in Korea architecture has been the modernization of the traditional architecture. The successful modernization of Korean traditional architecture depends on successful theorization of the tradition. However, many attempts to theorise the uniqueness of tradition in Korean architecture had not been instrumental to the modernization of Korean traditional architecture. The reason why they were not successful lies in the lack of philosophical and methodological reflection upon how to approach the tradition. They were either trapped in ambiguous essentialism without systematic methods and theories, or simply inventing the tradition from the vantage point of the present. This paper argues that in order to theorise the tradition, one need to translate the tradition into contemporary architectural vocabularies. What is important in translating the tradition is not to directly apply contemporary concepts and perceptual frame of architecture to traditional architecture but to find the gaps and differences between the two. This will open hermeneutic spaces to translate the tradition into useful principles and vocabularies of comtemporary architecture.

• 한국화재소방학회논문지
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• 제23권2호
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• pp.78-84
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• 2009

본 연구에서는 형식이 각기 다른 3종류의 미분무수 노즐을 사용하여 방사높이와 화염의 위치 변화에 따른 소화성능 실험과 포 소화약제를 혼합한 소화성능 실험을 수행했다. 소화성능 실험에서는 미분무수 노즐의 높이를 4m, 3.5m, 3m로 변화를 주었으며 연료 팬을 노즐 중심으로부터 0m, 0.5m, 1m의 변화를 주었다. 포 소화약제는 3%형 AFFF(Aqueous Film Forming Foam)를 사용하였다. 실험결과 개구부의 유무는 소화에 미치는 영향이 적었으며, 포 소화약제를 혼합한 미분무수의 소화성능은 약제를 혼합하지 않은 경우에 비하여 우수하였다.

• 한국간호교육학회지
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• 제3권2호
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• pp.150-162
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• 1997

The purpose of this study is to examine hospital noise level and discomfort due to noise. The subjects were 156 patients from University hospital in Taegu. The data was collected from April 10 to May 14, 1997. The collected data were analyzed by SPSS program using percentage, paired t-test, ANOVA, and Pearson Correlation Coefficient. The results were as follows ; The mean score of noise level was 1.62. There was no statistically significant difference in noise level between day and night. Patients perceived higher noise in the categories of conversation of visitors, conversation of care providers, noise of air conditioners, and the conversation of nearby patients than others during the day. Patients perceived higher noise in the categories of noise of air conditioners, conversation of visitors, conversation of care providers, and telephone ringing than others during the night. There were no statistically significant differences in noise level among the 4 wards during the day or night. Discomfort was due to the forementioned noise, categories of high scores were sleep disturbed, irritated, not so bad or not noisy, and noisy. To avoid noise, the subjects coped by putting on a quilt, going out, sleeping, opening or closing the window or door, and plugging ears. These results indicated that hospital noise have a negative influence on patients' health. So noise levels should be reduced in hospitals.