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- 저자 : 姜明植 (검색결과 31 건)
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모 축전지 회사 근로자들의 연폭로 지표에 대한 경시적 관찰
강명식,김용배,이용진,리갑수,김화성,황규윤,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1998 순천향산업의학 Vol.4 No.1
Lead poisoning is still prevalent and one of important occupational disease in Korea. To prevent undue high lead burden and maintain good health condition of lead workers in lead using industries, periodic health examination and regular biological monitoring of lead workers are often required in addition to the fundamental improvement of their working condition. To evaluate the effect of comprehensive occupational health program with regular biological monitoring on the level of lead exposure of lead workers in lead using industries, 11 year database from 1983 to 1994 of one storage battery factory was reviewed. From 1983 to end of 1986 only periodic health examination was provided to the lead workers, but from 1987 comprehensive occupational health program with regular biological monitoring was provided to maintain better health condition of lead workers. Selected study variables for lead exposure were blood lead(PbB), zinc protoporphyrin in blood(ZPP), δ-aminolevulinic acid in urine(ALAU), hemoglobin(Hb), hematocrit(HCT). Information on sex, age and work duration was also reviewed. 5 years data from 1983 to 1987 and 3 years data from 1990, 1993 and 1994 were available for all lead exposure indices except ALAU which has only 5 years data from 1983 to 1997. The results of 11 years longitudinal observation of lead indices are all follows: 1. The mean value of ZPP of lead workers in 1983 was 148.7±73.1 ㎍/㎗(Male: 145.5±72.3, Female: 168.1±79.1), whereas that of ZPP of lead workers in 1994 was decreased to 64.3±32.7 ㎍/㎗(Male: 60.2±28.8, Female: 95.2±43.4). 2. The mean value of PbB of lead workers in 1983 was 56.4±18.8 ㎍/㎗(Male: 55.59±19.1, Female: 59.6±19.1), whereas that of PbB of lead workers in 1994 was dcreased to 35.4±11.9 ㎍/㎗(Male: 35.7±12.0, Female: 32.8±10.8). 3. The mean value of Hb of lead workers in 1983 was 14.1±1.4 g/㎗(Male: 14.4±1.1, Female: 11.7±0.8), whereas that of Hb of lead workers in 1994 was increased to 15.6±1.5 g/㎗(Male: 15.9±1.2, Female: 12.9±1.1). 4. Blood lead is most highly correlated with ZPP(r=0.522, male:0.54 and female:0.50) and also correlated with ALAU and work duration also. 5. The simple regression analysis of PbB and ZPP showed different coefficient of regression by the measurement year, but there was no difference of coefficient of regression between sex. The slope of equation of pooled data for 1983-1986 without comprehensive occupational health program was 2.16 and differed from that of pooled data for 1987-1994(1.25). This difference suggests that the unit effect of blood lead on ZPP was relatively smaller in later period of comprehensive occupational health program than carly period without comprehensive program. The slope change in the analysis of linear regression of PbB on ZPP in lead workers can be used to evaluate the possible effect of health intervention to prevent undue high lead absorption in lead using industries. 6. 11 years occupational health service in this storage battery factory brought out considerable improvement of health status of lead workers in terms of decrease of PbB and ZPP and increase of Hb and the improvement was more remarkable after the introduction of comprehensive occupational health program.
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低密度 Polyethylene에 有機物添加에 內部 部分房電, Tree 進展및 형상에 미치는 효과
姜明植 大田開放大學 1986 論文集 Vol.4 No.-
Insulating materials can fail through the internal growth of tree-like breakdown channels. Trees are defined as highly localized electrical discharges in insulating materials. The trees, which have grown from a highly stressed part of the transparent insulators at the electrode, are easily observed under a microscope. This paper describes the effects of a organic additives on the tree starting and propagation in low density polyethylene, based on space charge effect. The experiments on tree propagation, DC prestress and internal partial discharge were carried out. From the experimental results, it is concluded as following. 1) The space charges are dominant in determining the space of tree and time to breakdown of the insulation. In case of bush type tree, tree propagation is suppressed. 2) The initiation and growth of tree is suppressed with polar additives 3) Especially, m-cresol is most effective additive to form the space charge and suppress the propagation of tree among the selected additives.
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임기조,강명식 大田工業大學 1990 한밭대학교 논문집 Vol.7 No.1
This study concerned with the bending strength and deformation capacity and characteristics of Weld formed Light Weight H-Shaped Steel Beams under pure or 3-Point bending. Through this experimental test and analysis, the following conclusions were obtained. 1, Through the coupon test and Stub Column test, it was found that the section properties of Light Weight H-Shaped Steel Section was satisfied structural design code and specification. 2. The bending strength of Light Weight H-Shaped Steel Beam is related to slenderness ratio, and the increasing ratio of stress. 3. The deformation capacity of Light Weight H-Shaped Beam is expressed by eq. (3-4). 4. The bending strength of Light Weigh H-Shaped Beam under Pure bending and 3-Point Bending is Predicted by the numerical analysis on moment-curvature relationships and the test results.
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강명식 수원대학교 교지편집위원회 1987 水原大文化 Vol.3 No.-
방송매체는 전파매체로서 수용된 메시지가 일단 전파로 송출되면 수신기를 수유하고 있는 수백만의 시청자에게 전달 될 수 있는 힘을 가지고 있는 동시에 한정된 지면을 가지는 인쇄매체에 비하여 다향의 메시지를 빠른 시간내에 넓은 지역에 동시에 전달할 수 있는 힘을 가지고 있다. 이러한 방송매체는 그 수용자인 국민을 문화적 백치로 만들 수도 있고 문화적 엘리트로 만들 수도 있으며 사회적 모순을 통합, 조화로 유도할 수도 있고, 균영을 조장, 사회해체를 가져올 수도 있는 것이다. 그러므로 방송은 정치·경제·문화적 및 사회적으로 큰 영향력을 지니고 있다 할 것이다
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