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유기용제에 장기간 폭로된 근로자의 정신의학적 기능과 삶의 질
김석재,강순아,유지숙,국승희,윤진상,문재동,이형영 大韓神經精神醫學會 2000 신경정신의학 Vol.39 No.5
연구목적: 본 연구는 Y공단의 제조공정에서 저농도의 유기용제(solvent)에 장기간 노출된 근로자의 정신의학적 기능과 삶의 질을 평가하고자 하였다. 방법: 총 142명의 남성근로자 중 유기용제에 폭로된 군(이하 폭로군) 82명과 폭로되지 않는 군(이하 비폭로군) 60명에게 간이정신진단검사(Symptom Checklist-90-R, SCL-90-R), 인지 및 정신운동성검사 (Critical Flicker Fusion Threshold. CFFT; Choice Reaction Time, CRT;Compensatory Tracking Task, CTT;Digit-Symbol Substitution, DDS) 및 한국판 스미스클라인 비챰 삶의 질 척도(Korean version of the SmithKline Beecham 'Quality of Life' Scale, KvSBQOL) 등을 적용하였다. 두 군간의 비교는 평가치의 평균에 대해 t-검증을 하였고 또한 연령과 학력을 공변인으로한 공변량분석(ANCOVA)을 하였다. 결과: SCL-90-R의 9개 증상 차원과 3개 전체 지표 점수는 두 군이 각각 정상범위였다. 그러나 신체화 (Somatization, SOM), 우울(Depression, DEP), 적대감(Hostility, HOS), 공포불안(Phobic anx-iety, PHOB)의 증상차원과 전체심도지수(Global Severity Index, GSI), 표출증상합계(Positive Symptom Total, PST)의 전체 지표는 폭로군이 비폭로군보다 유의하게 높았다. 인지 및 정신운동성 검사와 삶의 질은 두 군간에 유의한 차이는 없었다. 결론: 이상의 결과는 유기용제가 허용치 이하일지라도 장기간 폭로되는 경우에는 정신의학적 문제를 다소 일으킬 수 있음을 시사하였다. 중심단어:유기용제·근로자·정신건강·정신운동성 기능·삶의 질. Objectives: The aim of this study was to evaluate the psychiatric function and quality of life of the chemical workers who had been exposed to long-term, low-level organic solvents in the Y industrial complex. Method: A total of 144 male workers, of whom 82 were in the exposed group and 60 in the unexposed-control group, were evaluated by using Symptom Checklist-90-R(SCL-90-R), series of neuropsychological tests(critical flicker fusion threshold, CFFT) ; choice reaction time, CRT ; compensatory tracking task, CTT) ; digit symbol substitution test, DSS), and the Korean version of the SmithKline Beecham Quality Of Life scale(KvSBQOL). For the statistical analyses, comparisons of the means of the two groups were performed for each variable with two-tailed t-test as well as ANCOVA including age and education as covariates. Results: For the SCL-90-R, the nine symptom scales and the three global indices were clinically within normal range in both groups. However, the scores on the symptom scales of 'somatization','depression','hostility' and 'phobic anxiety', and those on the global indices of 'global severity index' and 'positive symptom total', were significantly higher in the exposed group than in the unexposed group. In terms of the neuropsychological function and the quality of life, there wes no significant difference between the two groups. Conclusion: These findings suggested that the long-term eposure to mixed organic solvents, even at the low level below the permissible exposure limit, might induce some psychiatric problems. KEY WORDS: Organic solvent·Worker·Mental health·Psychomotor function·Quality of life.
정향 , 마황 , 계피의 간염 B 형 바이러스 증식 억제 효과
강석연(Seog Youn Kang),김태균(Tae Gyun Kim),박민수(Min Su Park),한형미(Hyung Mee Han),정기경(Ki Kyung Jung),강주혜(Ju Hye Kang),문애리(A Ree Moon),김승희(Seung Hee Kim) 한국응용약물학회 1999 Biomolecules & Therapeutics(구 응용약물학회지) Vol.7 No.2
This study was undertaken to test for anti-Hepatitis B virus (HBV) activity of the aqueous extracts prepared from Eugenic caryophyllate, Ephedra sinica, Cinnamomum cassia. Aqueous extracts were assayed for the inhibition of HBV replication by measurement of HBV DNA and surface antigen (HBsAg) levels in the extracellular medium of HepG2 2.2.15 cells. All extracts decreased the levels of extracellular HBV virion DNA at concentrations ranging from 128 to 256 ㎍/㎖ and inhibited the production of HBsAg dose-dependently. Our findings suggest that these three hebal medicinal plants may have potential to develop as specific anti-HBV drugs in the future.
오석문(Oh Seog-Moon),강길현(Gil Hyun Kang),김성권(Kim Soung-Kwon),유경종(Yu Kyoung-Jong),최석중(Choi Seog-Jung) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper introduces KTX RCM(Reliability-Centered Maintenance) project which is for development of a decision making support system on the KTX maintenance framework. The functionality of the system is composed of (ⅰ) Fundamental Data Management, (ⅱ) Maintenance Goal Management, (ⅲ) Maintenance Program Management, (ⅳ) Cost-Effect Analysis, (ⅴ) Parameter Management. This system may improve existing maintenance Management procedure for rolling stock of KNR.
VHDL을 이용한 Z80 마이크로프로세서의 모델링 및 구현
강문석,이재흥 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.0201
This paper proposes the VHDL modeling in register transfer level(RTL) for the development of Zilog80-8bit microprocessor, and then logic diagrams of gate-level are designed from that. On the basis of the data book and reference books about Z80 microprocessor, analyze the operating characteristics, it is divided into 5 blocks. These blocks are divided into several subcomponement in RTL. And then, each component is described by using 3-type methods of VHDL modeling. In order to show the accuracy of the proposed Z80 microprocessor, its functionality is verified by using Synopsys simulator and extracted the logic diagrams of gate level through logic synthesis. In this paper, this designed Z80 microprocessor is implemented with a EPF10K50GC403 FPGA of Altera and verified its the accurate operations.