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.

술후성 상악낭종 : 증례보고 및 문헌적고찰 Case Reports & Review of Literature

이충국,양성익,차인호,김진 대한악안면성형외과학회 1986 대한악안면성형외과학회지 Vol.8 No.1

球狀黑鉛鑄鐵의 鹽浴窒化

張忠根,金水泳,李相益 충남대학교 자연과학연구소 1977 學術硏究誌 Vol.4 No.1

Liquid nitriding is being is used for machine parts to improve fatigue strength and resistance to wear and seizure in spheroidal graphite cist iron. The difference in matrixes with as cast, pesrlite or ferritic structure in the iron has an important effect on nitriding. in the present work, spheroidal graphite cast irons with different matrixes nitrided by the tufftride process at 570 C for 1-6 hrs for a bask study on the nitriding of spheroids1 graphite castiron. The relationship between maximun hardness and nitriding time can be obtained as follows. In ferritic matris, hardness of matrix increased from 250Hv for 6hrs of nitriding time. In pearlite matrix, hardness of matrix increased from 390Hv to 560Hv. for 6 hrs of nitrding time.

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

아트리움 공간에서의 화재성상에 관한 축소모델 실험연구

김충익,유홍선,류승관 (社團法人) 韓國火災 ·消防學會 1999 한국화재소방학회논문지 Vol.13 No.4

결시자에 대한 합리적인 배점기준표 작성을 위한 조사연구

김익찬,현진오,정충덕,강정우,김철수 濟州大學校 師範大學 科學敎育硏究所 1993 科學敎育 Vol.10 No.1

In this thesis examine and analyze the items for the absent oneself from tests in the rule of school record about each senior high school in Cheju area, and then fair rules in statistics are suggested. Real data were collected from all schools in this area and they were compared and tested by experimental methods. The best idea is ①M2 for 3 more tests in one semester and ②M1 or M7 for 2 tests. and those are shown in main results.

天安 및 忠淸地域의 産婦人科 應急患者에 관한 臨床的 硏究

李元起,朴忠學,朴鎭完,許義宗,李昌益 단국대학교 1995 論文集 Vol.29 No.-

The objective of this study is to analyze clinical evaluation of 313 patients in Obstetrics and Gynecology who visited Emergency Room in Dankook University Hospital from June, 1994 to December, 1994 for the purpose of successful and perfect emergency care of the patients in Obtetrics and Gynecology in Cheonan-Chungcheong District in the futrure. Today, the goal of modern obstetrics is the well-being of both mother and fetus. And there are many gynecologic diseases which lead the female patient to emergency room with the chief complaint of severe abdominal pain or vaginal bleeding, etc. We have of emergency patients, clinical characteristics of the patients, the time of patient's entrance in emergency room, the monthly distribution of visit, the crowding day of visit, the distribution of the patients according to living area, the admission rate, and the management of the patients, etc. Followings are the results summarized : 1. The mean age was 29.8 years(range form 10 to 85). The mean number of gravidity and parity were 2.0 and 1.1 respectively. The mean number of abortion and living child were 1.0 and 1.0 respectively. 2. The most predominant monthly distribution of visit were August and December. 3. The admission rate was 48.2% and the discharge rate was 49.5%. 4. Distribution of department was Internal Medicine, Pediatrics, Orthopedics, and Obstetrics & Gynecology, in order. 5. The most crowding day of visit was Sunday(22.0%). The peak time of patint's entrance in emergency room was between 20:00 PM and 24:00 PM(24.3%), and the second peak time was between 16:00 PM and 20:00 PM(21.4). 6. Of 313 patients, 53% were known to live in Cheonan city and Cheonan county. 82.7% were known to live in Chungcheong District. 7. In 151 patients who admitted the ward, 53% were obstetric patients and 47% were gynecologic patients. 8. In 80 obstetric patients of admission, the most common chief complaint was labor pain(76.3%). In 71 gynecologic patients of admission, the incidence of disease was abortion(32.3%), ectopic pregnancy(25.4%), and pelvic inflammatory disease(11.3%), in order. 9. Major operations were performed in 40 patients of 151 admitted patients(26.5%). Minor operations including Dilatation and Curettage were performed in 12 patients(7.6%). 10 In 155 patients of discharge, the incidence of disese was abortion(36 patients), pelvic inflammatory disease(20 patients), false labor(15 patients), and uterine bleeding(11 patients), in order.

액적 배열의 증발과 착화에 관한 수치해석적 연구

송기훈,김충익 韓國火災 ·消防學會 1999 한국화재소방학회논문지 Vol.13 No.1

터널 화재시 자연 배기에 의한 연기 거동에 관한 실험적 연구

이성룡,김충익,유홍선 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.1

본 연구는 터널내 화재발생시 자연 배기에 의한 연기의 거동을 해석하기 위하여 축소모형 실험을 수행하였다. 터널내 연기의 유동은 부력에 의해 지배되므로 Froude scaling에 의해 실물 터널을 1/20로 축소한 모형터털에서 실험을 수행하였으며 배기구의 위치변화에 따른 영향을 평가하기 위하여 화원으로부터 각가 1 m, 2 m, 3 m 떨어진 곳에 배기구를 대칭으로 위치시켜 세 가지 경우에 대해 실험을 실시하였다. 지름이 4.36cm인 화원의 경우, 배기구의 위치에 관계없이 배기구 통과 후 연층의 온도가 배기를 실시하지 않는 경우와 비교하여 약 7~8℃ 낮게 유지되었다. 지름이 5.23cm인 화원의 경우, 배기구가 화원에 가까울수록 배기구 통과 후 연기의 평균속도가 감소하였으며 최대 3.86초가 지연되었다.CASE 1에서는 배기구 통과 후 천장에서 약 8℃ , 수직온도가 약 7℃ 감소하였으며, CASE 2에서는 천장과 수직온도가 약 3℃ 감소하였으며, CASE 3에서는 각각 약 2℃가 감소하였다. 레이저와 디지털 캠코더를 이용하여 배기구 주위의 연기 유동을 가시화하여 화재발생 약 1분 후부터 연층이 두께가 터널높이의 25%이하로 일정하게 유지되는 것을 확인할 수 있었다. In this study, reduced-scale experiments were conducted to understand smoke movements in tunnel fires with the natural ventilation. The 1/20 scale experiments were conducted under the Froude scaling since the smoke movement in tunnels is governed by buoyancy force. Three cases of experiment, in which a natural vent location varied from 1 m,2 m,3 m from the fire source symmetrically, were conducted in order to evaluate the effect of the position of ventilation systems on smoke movement. In case of a pool whose diameter is 4.36 cm, the temperature of smoke layer passed through the vent was maintained 7~8℃ less than of smoke layer without a vent. In case of s pool whose diameter is 5.23 cm, the average velocity passed through the vent was decreased when it was close to the fire source. And the maximum delay time was 3.86s. In CASE1, the ceiling temperature was decreased by approximately 8℃ and the vertical temperature was decreased by approximately 7℃. In CASE 2, both ceiling and vertical temperature were decreased by 3℃ and in CASE 3, they were decreased by 2℃ each. It was confirmed that the thickness of smoke layer was maintained uniformly under the 25% height of through the visualized smoke flow by a laser sheet and the digital camcoder.

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.