단무지 공장에서 발생한 질식 사고의 원인과 방사선학적 소견: 중례보고 및 가스분석 결과

박충기,김만구,김흥철,안범규,박만수,황우철,최철순,강익원 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

목 적:단무지 공장에서 질식사고를 일으켰던 가스의 종류를 알아내고, 이러한 가스중독의 방서선학적 소견을 소개하기 위하여 본 연구를 하였다. 대상 및 방법:단무지 공장에서 발생한 질식 사고자 3예중 생존자 1예를 대상으로 단순흥부X-선검사와 CT 소견을 분석하였으며, 가스의 종류를 알아내기 위하여 단무지를 유리병에 넣어 발생된 가스를 가스크로마토그래픽을 이용하여 분석하였다. 결 과:단무지 공장에서 발생한 질식사고자중 생존한 1명의 방사선학적 검사에서 신속히 호전되는 폐경결(consolidation)을 볼 수 있었으며 이는 폐부종의 소견임을 알 수 있었다. 협기성 상태에서 단무지를 담은 유리병의 상층부 가스를 실험 분석한 결과 이산화탄소, 에칠알코올이 다량으로 검출되었으나 독성가스는 주로 황화수소이였다. 결 론:단무지 공장의 질식 사고자에서 폐방사선학적 소견은 폐경결을 보이는 폐부증으로서 이는 실험을 통해 단무지에서 발생되는 유독가스인 황화수소 때문임을 입증하였다. Purpose: To identify the main toxic gas released from salted radish in rice bran(Dan-M-Ji) and to introduce the radiological findings of the patient who was exposed to the gas. Materials and Methods: Chest radiographs and CT scans of one survivor among three men who were exposed to the gas from Dan-Mu-Ji were reviewed. Gas obtained from the closed bottle containing Dan-Mu-Ji was analized by using the gas chromatography. Results: The radiographlc examinations of the survivor were suggestive of pulmonary edema with it's rapidly improving consolidations in both lung. The headapace gas within the bottle containing Dan-Mu-Ji was mainly composed with carbon dioxide, ethyl alcohol and hydrogen sulfide, of which hydrogen sulfide was considered the main toxic gas released. Conclusion: Under the anaerobic condition, Dan-Mu-Ji released toxic hydrogen sulfide. Inhalation of hydrogen sulfide might produce non-cardiogenic pulmonary edema.

양극성 기분장애에서 세로토닌 수용체 유전자의 다형성(102T/C)에 관하여

지익성,신석철,왕성근,이선우,신용재,김충수,김상국,최하석,오승용,류택근,이영호 대한생물치료정신의학회 1999 생물치료정신의학 Vol.5 No.2

배열형 전력 MOSFET의 설계 및 제작

김진형,최연익,정상구,박찬광,김충기,성만영 亞洲大學校 1987 論文集 Vol.10 No.-

In this paper, the design of the array type power MOSFETs is discussed in terms of on-resistance, breakdown voltage, placement of FLRs(field limiting ring) and threshold voltage. Also, 9-cell(square-on square grid) VDMOSs are fabricated to confirm the feasibility of the design method. Existence of optimum p-well spacing for minimum on-resistance, which is anticipated by the theoretical results is confirmed by the experiment of the fabricated power MOSFETs. Breakdown voltage of power MOSFET is upgraded by using two FLR's and their optimum placement is determined from the experimental results of the diodes with FLRs. The threshold voltage is controlled by the ion implantation within the design specification. Experimental results are in good agreement with the design specification. Experimental results are in good agreement with the design values. Characteristics of the fabricated power MOSFETs are 190Ω in on-resistance, 270V in breakdown voltage and 2.9V in thershold voltage.

한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.

Understanding the Impacts of Disasters on Economic Growth: Application of Solow Growth Model and Its Implications

Choong Ik Choi(최충익) 위기관리 이론과 실천 2017 Crisisonomy Vol.13 No.6

본 논문은 유사한 재난발생이라도 국가에 따라 상이한 경제적 영향을 미칠 수 있음에 주목하고 그 거시적 메커니즘을 이론적으로 규명하고 있다. 재난이 국가나 지역의 경제상황에 따라 다른 파급영향을 미칠 수 있음에 착안하여, 대표적인 경제성장분석모형인 솔로우 성장모형을 통해 재난 발생이 국가나 지역의 경제성장에 어떤 영향을 미치는지 고찰한다. 본 연구의 방법론으로 활용된 솔로우 성장모형은 대표적인 신고전적 성장이론의 하나로서, 재난이 국가나 지역경제에 미치는 영향을 시 공간적 맥락에서 구조적으로 파악하기에 유용한 틀을 제시해줄 수 있다고 판단하였다. 솔로우 모형에서 경제성장은 자본의 증가, 노동투입 증가 그리고 기술 진보라는 세 가지 핵심 요소에 의해 이루어진다고 가정한다. 솔로우 모형을 통해 재난이 국가나 지역의 경제성장에 미치는 영향을 단순화시키고 핵심 요소들이 시공간적으로 어떻게 변화하는지 살펴본다. 솔로우 모형 적용결과 재난 이후 저축률 감소와 재난의 시공간적 불평등성이 발생하고, 경제수준에 따른 빈곤의 덫이 존재하는 것으로 나타났다. This article attempts to examine the impacts of disasters on economic growth with the application of the Solow growth model. The paper employs the Solow growth model as a methodology, which represents a neoclassical growth theory in economics. The key idea of this research begins with the assumption that the degree of disaster damage differs across the countries as they have different socioeconomic systems in the spatiotemporal context. In the Solow growth model, it is assumed that there are three main causes of economic growth; increase in the stock of capital, growth in labor input and technological progress. This research has a theoretical basis on the hypothesis that disasters have a strong influence on the national or regional economic system. The results support that the disastrous effects on economic growth depend on the economic status of countries or regions. In addition, the Solow growth model reveals economic inequality in the impacts of disasters.

The Distribution of New Town Development Paradigm against COVID-19: Lessons and Prospects

Choong-Ik Choi,Jaebum JUN 한국유통과학회 2020 유통과학연구 Vol.18 No.11

Purpose: This article aims to explore the new town development paradigm against infectious diseases. The distribution of COVID-19 constricts economic activity. The high frequency of outbreaks of COVID-19 nationwide is due to neither malnutrition nor unhygienic environment. Research design, data and methodology: The research question starts with the idea that understanding the features of the outbreak of pandemic diseases could help public health authorities to better cope with upcoming risks in the future. We have employed a big data-based methodology to explore the outbreak of pandemic diseases. Also, an idiographic approach is used to describe the distribution of new towns against COVID-19. Results: The results demonstrate that the rapid spread of COVID-19 has had a strong impact on regional economies and urban development. It was found that there is a close relationship between infectious diseases outbreaks and new town development. Conclusions: The findings could be used to deal with new town development against infectious diseases better in other cities or countries as well. The distribution of COVID-19 may become an unexpected opportunity for a paradigm shift in the distribution of new town development to prevent not only an excessive concentration in Seoul, but also an imbalance between national and local development.

Does economic growth really reduce disaster damages? Index decomposition analysis for the relationship between disaster damages, urbanization and economic growth and its implications

Choong-Ik Choi 서울시립대학교 도시과학연구원 2016 도시과학국제저널 Vol.20 No.3

This article aims to explore the characteristics of disaster damages in the context of economic growth and urbanization using index decomposition analysis. The key ideas of this study begin with two main research questions. First, does economic growth make any contribution to the reduction of disaster damages? Is the economic growth of a nation able to outweigh the respective disaster damages, particularly in advanced economies? Second, does urbanization tend to expand exposure to natural hazards and increase disaster damages? In this paper, a great deal of attention is paid to exploring answers to the above two questions using the case of Organization for Economic Cooperation and Development (OECD) countries. The main methodological concept starts with regarding disaster damages as one of various environmental impacts, which enables the proper application of the IPAT model. It is found that economic development contributed most to the decline of disaster damages and urbanization contributed slightly to the increase of disaster damages in OECD countries from 1990 to 2010.

Distribution and Application of Community-based Disaster Risk Information : Lessons from Shiga Prefecture in Japan

Choong-Ik Choi,Junho Choi 한국유통과학회 2018 유통과학연구 Vol.16 No.6

Purpose - This paper aims to explore the distribution and application of community-based disaster risk information and employ a case study as a qualitative research method to make some implications and suggestions for disaster management in the future. Research design, data, and methodology - This research has basically adopted an idiographic approaches to examine the basic policy of integrated flood risk management of Shiga prefecture in Japan. The methodology is based on a retrospective analysis, which starts from critical events and traces backwards processes to find out what goes well or wrong. Results - The results of this paper support that the multiple stakeholders in a community have to share and distribute disaster risk information in the proper time. The distribution and application of community-based disaster risk information cannot be overemphasized in that the local communities are culturally rich in traditional flood management knowledge, have voluntary organizations and have enjoyed mutual support and human network to cope with floods. Conclusions - The study results also imply that local residents of the community will be abe to have an important role in coping with natural disasters, which involves more proactive actions than passive actions for the enhancement of disaster management.

현대 서울의 재난․재해 발생 특성에 관한 역사적 연구

최충익(Choi Choong Ik) 한국지역개발학회 2013 韓國地域開發學會誌 Vol.25 No.1

This paper aims to explore the disaster characteristics in modern history of Seoul. Seoul has experienced two extreme changes during the past 80 years; drastic improvement of urban lives` quality and sufferings of natural disasters` risk. The results of this study argue that frequency and intensity of extremely natural events in Seoul are increasing, entailing a heavy loss. The citizens of Seoul suffered from the prevalence of epidemics right after Korean War, whereas improvements of hygienic conditions reduced outbreaks of contagious diseases. Also this study found the causes shift of fires, which means that the frequency of electric fire exceed that of oil fire due to industrialization and urbanization.

도시가뭄재해 피해액 산정에 관한 기초연구

최충익(Choi Choong-ik) 대한국토·도시계획학회 2010 國土計劃 Vol.45 No.4