A RESEARCH ON EFFECTIVE FIRE/DISASTER PROTECTION OF UTILITY TUNNEL IN KOREA

Park,Hung-joo,Son,Bong-sei,Jee,Nam-yong 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

The pipes and cables buried below ground, which may have helped to improve city landscape, is becoming direct and indirect causes for various kinds of disaster in Korea. Every advantage from the use of utility tunnel can not be converted in a dollar since there is associated huge contribution to safe urban environment. The Korean government has a certain role to play in helping promote utility tunnels for the past years. Most recently, many utility tunnels have been being checked to find out safety level, especially fire safety level, and main problems and shortcomings are checked out as a result of this survey. Because the fire safety level of existing tunnel is low, possible approaches and solutions are presented according to the analysis of fire safety level. In order for these approaches to be effective, existing tunnel should be supplemented appropriately and extra equipment must be installed according to the solutions. Hopefully, by performing both improvement of existing utility tunnel that provide a fire/disaster proof and introducing new types of tunnel which influence utility management and maintenance, the recent disaster rate in Korea can be diminished up to a desirable rate in a near future.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

피로시험에 의한 다단변후재의 응력확대계수 해석

최용식,장세인,박종주,석창성 成均館大學校 科學技術硏究所 1991 論文集 Vol.42 No.1

Variable thickness plates have been used as structural members in practical engineering services. The stress intensity factor values near and at the thickness interface of the plate must be determined for use of integrity evaluation and designing of such structures. Several studies of the stress intensity factor on the variable thickness plates have been reported by the theoretical and the finite element analysis. Besides, there exists no clear solution for that. In this study, another experimental analysis method of the stress intensity factor on the variable thickness plate using fatigue test technique was introduced. And the stress intensity factor on the plate was determined by the method using SS41 carbon steel plate.

한국 여성사 정립을 위한 인물 유형 연구 : from Ancient Times to Tae-han Che-guk(大韓帝國) 고대에서 대한제국 시대까지

정세화,최숙경,이배용,장필화,김영미,박진숙 이화여대 한국여성연구소 1988 여성학논집 Vol.5 No.-

This study is an attempt to analyse the types of women recorded in historical documents. The categories are broadly divided in three areas; political, social and familial spheres. In the political sphere, three queens in Shilla period, the only period in Korean history when a queen was the supreme ruler, and women who had a formal right to be involved in the determination of soverign successor, to assume regency, and who had various informal political influence. In the social sphere, women's economic and religeous activities were examined. Also women specialists such as medicine women, shamans and kisaeng (entertainers) are examined in this category. In the familial sphere, conjugal relationships of first (legitimate) wives and concubines, and women's status and activities are investigated. The gradual establishment of patriarchal system initiated by the state, and the conflict of women's interests in the process was analysed. As a result of this preliminary analyses, it became clear that the social position of women in Korean history was constricted with the growth of the power of the state. In the case of ancient Korea and Koryo period women's status in the family was comparatively higher and their personal activities were freer although their political and social activities were restricted. As time progressed, the establishment and reinforcement of partriarchal system of the state based on confucian ideology had crucial importance on the position of women in society. The system of family was restructured and carefully monitored, and the members of the family were closely controlled. The state sought the material and ideological bases of the power through these control. As a result, the status of women became more structurally subjugated to make heads of the family, especially after the mid Choson dynasty.

정신분열증 환자에서의 카페인 투여 급성반응

김도관,박종세,김용식 大韓神經精神醫學會 1988 신경정신의학 Vol.27 No.1

This study was conducted to investigate the acute effects of caffeine in chronic schizophrenia. Eighteen DSM-Ⅲ diagnosed chronic schizophrenic patients and sixteen healthy subjects were orally administered caffeine, 10㎎/㎏, in a double blind placebo controlled design after being free of caffeine for a minimum of 2 weeks. The effects of caffeine were assessed by employing Brief Psychiatric Rating Scale, Hamiltion Anxiety Scale, and measures of blood pressure, pulse and plasma caffeine level, prior to the challenge and 60 minutes afterwards. The results were as follows : 1) Activation factor(tension, excitement, mannerism and posturing) of BPRS was worsened significantly by caffeine challenge in the schizophrenic patients. 2) Caffeine produced significant increase in somatic anxiet factor score of HAMA in the healthy subjects. 3) There was no significant difference in blood pressure and pulse rate between caffeine and placebo-group except sitting diastolic BP in the healthy subjects, which was higher in experimental group. There findings suggest that caffeine tend to exacerbate symptoms of psychosis but do not increase anxiety in the schizophrenic patients compared with the healthy subjects demonstrated decreased sensitivity to the anxiogenic effects of caffeine.

직무스트레스가 실업에 미치는 영향

정윤경,김형렬,박소영,홍정연,고상백,장세진 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.2

간경변증 환자에서의 위 배출 시간

기주영,채희복,박선미,윤세진,정현용 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

간경변증 환자에서 소화기 증상의 정도와 울혈성 위염, 복수의 유무가 위 배출 시간의 지연과 관련이 있는지 알아보고자 하였다. 대상 환자는 2001년 3월 1일부터 2002년 5월 31일까지 간경변증으로 진단 받은 33명의 환자를 대상(평균연령 54.3세)으로 하였고, 정상 대조군을 위 장관 질환의 과거력이 없고 소화 장애등의 자각증상이 전혀 없으며 위 배출등에 영향을 줄 수 있는 약물 복용이나 전신 질환이 없었던 15명을 대상(평균 연령 30세)으로 하였다. 위 배출 시간검사는 50gm의 달걀 1개에 Tc^(99m)-tincolloid lmCi를혼합하여 고형질화 시킨 TC^(99m)-tin-colloid-steamed egg를 섭취한 후부터 single-head-gamma camera(Picker Co,. USA)을 이용하여 위 배출 시간 반감기(T1/2)를 찾아냈으며 위배출 시간은 T1/2의 평균±표준편차로 표시하였다. 위 배출 시간의 지연은 정상 대조군 T1/2의 mean±1 SD(45.0+12.7분) 이상으로 하였다. 정상 대조군(n=15)의 위 배출 시간은 42.64±16.80분이었고, 간경변증 환자군(n=33)은 42.54±20.80분으로 두 군 사이에 유의한 차이가 없었고, 울형성 위염 및 복수의 유무, 증상점수 4점을 기준으로 하였을 때 위 배출 시간은 두 군 사이에 유의한 차이가 없었다. 식도 정맥류가 있는 군(n=26)과 없는 군(n=7)의 위 배출시간은 각각 49.27±16.80분, 31.71±10.61분이었고, 위 정맥류가 있는 군(n=7)과 없는 군(n=26)의 위 배출 시간은 각각 53.14±11.71분, 43.50±5.85분으로 정맥류가 있는 군에서 위 배출 시간의 지연을 보였으나 통계적으로 유의하지는 않았다(식도 정맥류 p=0.654, 위 정맥류 p=0.991). 혈청 알부민 수치와 위 배출 시간 반감기는 서로 유의한 상관관계가 없었다(p=0.177). 결론적으로, 간경변증 환자에서의 소화불량 증상의 정도와 울혈성 위염, 복수의 유무에 따라 위배출 시간에 차이가 없었다. The purpose of this study was to evaluate whether delayed gastric emptying time(GET) was associated with the degree of gastrointestinal discomfort, congestive gastropathy, and ascites in patients with liver cirrohsis. Thirty three patients, aged 54.3 years, with liver cirrhosis and fifteen control subjects, aged 30 years, without gastrointestinal symptoms and history of gastrointestinal disease were participated from the first of March in 2001 to the 31st of May in 2002. For GET, solid phase gastric emptying was done with radionuclide scintigraphy using single-head gamma camera after ingestion of Tc99m tin-colloid-steamed egg. Delayed GET was defined as the half time period in GET(T1/2) longer than the mean value plus 1SD of controls (45.0+12.7min). GET between Control group and patients with liver cirrhosis was 42.64±16.80min, 42.54+20.80, respectively. Therefore, there is no significant difference. On the base of congestive gastropathy, symptom score '4', and cirrhosis, there is no difference statistically between two groups. GET measured in the group with esophageal varix(n=26) or without esophageal varix(n=7), was 49.27±16.80min, 31.71±10.61min, respectively. GET measured in group with gastric varix or without varix, was 3.14±11.71min and 43.50±5.85min, respectively. But, there is no difference statically between two groups. There was no significant correlation between serum albumin level and T1/2 of GET(p=0.177). This study shows that there is with no apparent clinical difference between gastric emptying time and liver cirrohtic patients with gastrointestinal discomfort, congestive gastropathy, and ascites.

장중첩증을 동반한 맹장 지방종 1예

홍의실,나병규,김민옥,유일영,채지영,채희복,윤세진,이상전,송형근,박길선,정현용 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.2

대장 지방종은 주로 우측 결장에 호발하고 특히 회맹판 부위와 맹장 부위에 호발한다. 또한 50~60대에 빈도가 높고 증상이 있는 환자에서 장중첩증이 높게는 40~50%에서 보고되고 있어 성인 장중첩증의 원인으로 중요한 비중을 차지한다. 특히 성인 장중첩증 및 장폐쇄의 중요 원인인 악성 종양과 임상 양상이 유사하여 감별진단이 중요하다. 저자들은 반복적인 복통을 주소로 내원한 환자에서 맹장의 4×5㎝의 점막하 지방종이 말단 회장부위와 반복적인 장중첩중이 발생했던 1례를 부분 절제술로 치료하여 양호한 임상 경과를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Lipomas are one of the most common benign nonepithelial tumors of the colon which are often detected incidentally by radiologic investigation or on operation. These tumors are usually without specific symptoms. Colonic lipomas occur most often in the right colon, particularly in the ileocecal valve and the cecum. Most patients are asymptomatic. but tumors larger than 2 cm tend to produce a change in bowel habit. abdominal pain. rectorrhagia and complications including luminal obstruction or intestinal intussusception. Diagnosis can be made by colonoscopy abdominal CT. MRI, or barium enema. We report a case of lipoma of the cecum that originated in the submucosa and presented as a intussusception in a 50-year-old woman with a brief review of the literature.

Subgap Density-of-States-Based Amorphous Oxide Thin Film Transistor Simulator (DeAOTS)

Yong Woo Jeon,Sungchul Kim,Sangwon Lee,Dong Myong Kim,Dae Hwan Kim,Jaechul Park,Chang Jung Kim,Ihun Song,Youngsoo Park,U-In Chung,Je-Hun Lee,Byung Du Ahn,Sei Yong Park,Jun-Hyun Park,Joo Han Kim IEEE 2010 IEEE transactions on electron devices Vol.57 No.11

<P>The amorphous oxide thin-film transistor (TFT)-oriented simulator [subgap Density of states (DOS)-based Amorphous Oxide TFT Simulator (DeAOTS)] is proposed, implemented, and demonstrated for amorphous indium-gallium-zinc-oxide (a-IGZO) TFTs. It only consists of parameters having their physical meanings and is supplied with concrete techniques for parameter extraction. Among the physical parameters, the acceptor-like DOS <I>gA</I>(<I>E</I>) was experimentally extracted using the multifrequency <I>C</I>-<I>V</I> technique, whereas the donor-like DOS <I>gD</I>(<I>E</I>) and the doping concentration <I>ND</I> were extracted using numerical iterations. The simulation result reproduces the DOS and thin-film-thickness-dependence of dc <I>I</I>-<I>V</I> characteristics very well. Compared with the previously reported a-Si TFT models, the proposed DeAOTS model not only reflects the strong <I>V</I><SUB>GS</SUB> dependence of the effective mobility (μ<SUB>eff</SUB>) but also clarifies the relations between process-controlled DOS parameters and dc <I>I</I>- <I>V</I> characteristics based on experimentally extracted DOS parameters. Also, it sufficiently takes into account the peculiar situation of amorphous oxide TFTs where the free-carrier charge can be larger than the localized one out of the total induced charge. Moreover, it reproduces the measured electrical characteristics within the wide range of <I>V</I><SUB>GS</SUB>/<I>V</I><SUB>DS</SUB> with a single equation, not distinguishing the operation regions such as the subthreshold, linear, and saturation regimes.</P>

Development of Prediction Equation of Diffusing Capacity of Lung for Koreans

( Yong Il Hwang ),( Yong Bum Park ),( Hyoung Kyu Yoon ),( Seong Yong Lim ),( Tae-hyung Kim ),( Joo Hun Park ),( Won-yeon Lee ),( Seong Ju Park ),( Sei Won Lee ),( Woo Jin Kim ),( Ki Uk Kim ),( Kyeong 대한결핵 및 호흡기학회 2018 Tuberculosis and Respiratory Diseases Vol.81 No.1

Background: The diffusing capacity of the lung is influenced by multiple factors such as age, sex, height, weight, ethnicity and smoking status. Although a prediction equation for the diffusing capacity of Korea was proposed in the mid-1980s, this equation is not used currently. The aim of this study was to develop a new prediction equation for the diffusing capacity for Koreans. Methods: Using the data of the Korean National Health and Nutrition Examination Survey, a total of 140 nonsmokers with normal chest X-rays were enrolled in this study. Results: Using linear regression analysis, a new predicting equation for diffusing capacity was developed. For men, the following new equations were developed: carbon monoxide diffusing capacity (DLco)=-10.4433-0.1434×age (year)+0.2482×heights (cm); DLco/alveolar volume (VA)=6.01507-0.02374×age (year)-0.00233×heights (cm). For women the prediction equations were described as followed: DLco=-12.8895-0.0532×age (year)+0.2145×heights (cm) and DLco/VA=7.69516-0.02219×age (year)-0.01377×heights (cm). All equations were internally validated by k-fold cross validation method. Conclusion: In this study, we developed new prediction equations for the diffusing capacity of the lungs of Koreans. A further study is needed to validate the new predicting equation for diffusing capacity.