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제조업 근로자들의 작업과 연관된 요통의 위험요인에 관한 연구
김대환,김정호,신해림,전진호,김용완,이채언,Kim, D.H.,Shin, H.R.,Chun, J.H.,Kim, Y.W.,Kim, J.H.,Lee, C.U. 대한예방의학회 1993 Journal of Preventive Medicine and Public Health Vol.26 No.1
Work-related low back pain is one of the major factors that cause the loss of working power especially in actively working age, therefore controlling the work-related low back pain is one of the major issues in the field of industrial safety and health. This study was performed for detecting the risk factors and proposing the efficient control program of the work-related low back pain. The subjects were male workers employed at the manufacturing industry in Pusan with longer than 6 months' working duration. The data was collected by self-reported questionnaire and interview from May 1 to October 31,1992. The contents of questionnaire were as follows:. the experience of low back pain within the recent one month, general characteristics(age, marital status, education level, religion, regular exercise), physical characteristics(height, weight), employment status(working duration, daily working hours, rest during work, satis(action fur the job), type of work and working environments(posture, forward bending, lifting and movement, satisfaction for table and chair). The result was analyzed for 608 entire respondents by case-control comparative method. The number of cases was 152 with a history of work-related low back pain, so the relative frequency of self-reported work-related low back pain was 25.0%, and the number of controls was 344 without any history of low back pain. As a result, two characteristics of the employment status(working duration, satisfaction fur the job) and all characteristics of type of work and working environments showed a statistical significance between the case and control groups(p<0.01). The Oddb ratios of these variables for Work-related low back pain were calculated. They were 7.88 for the satisfaction fur chair, 7.86 for lifting and movement,3.31 for satisfaction for table, and 2.22 fur bending forward(p<0.01). And for the multivariate logistic regression analysis confirmed that unsatisfaction for table was independent risk factor for Work-related low back pain. In summary, though this study was based upon the self-reported questionnaire and the subjective complaints, the satisfaction for chair, lifting and movement, satisfaction for table, and bending forward concerned with the type of work and working environments were considered as the main factors causing the work-related low back pain, and the work-related low back pain may be preventable by the ergonomic control of these factors.
김대환(D. H. Kim),방승양(S. Y. Bang) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.2
본 논문에서는 문자 영상 데이타의 변형량을 정의하고 그것이 가져야 할 조건 6가지를 제안한다. 이 조건은 변형량이 여백이나 문자의 두께에 무관하며 같은 문자 뿐만아니라 다른 간에도 비교할 수 있도록 한다. 비교의 대상으로 할 변형량들은 평균 엔트로피, 분포 엔트로피, 변동 엔트로피, 단위 윤곽선 변동량, Dispersion Factor이다. 이 5가지 변형량에 대해서 변형량의 6가지 조건 중 어느 것을 만족시키는지 수식을 통해 알아내었다. 또 데이타의 인위적인 여러 분포에 대하여 각 변형량을 측정해 보고 수식을 통해 밝힌 내용이 옳음을 검증한다.
김대환(D.H. Kim),방승양(S.Y. Bang) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.1
본 논문에서는 한글 필기체 문자인식 시스템을 실험하는데 필수적인 문자 데이타를 수집하여 데이타 베이스를 만드는 방법을 알아본다. 대상으로 하는 문자는 off-line 한글 필기체 문자로 문자인식 시스템은 음절 단위로 인식함을 가정한다. 문자 데이타 베이스를 만드는데 고려해야 될 사항들 즉, 대상 한글의 갯수, 데이타의 벌 수, 수집 용지의 규격, 데이타 화일의 규격, 문자 데이타의 조건 등에 대하여 알아본다. 필기체 문자 데이타 베이스의 작성으로 연구 개발자들에게 문자인식 실험에 필요한 데이타를 제공하고 필기체 문자인식 데이타의 표준화를 할 수 있게 한다.
자돈에 (仔豚) 있어서 혈장단백 (血漿蛋白) 대용제 ( Probline ) 의 급여효과
김대환(D . H . Kim),엄재상(J . S . Um),남두석(D . S . Nam),백인기(I . K . Paik) 한국축산학회 1996 한국축산학회지 Vol.38 No.4
This study was conducted to evaluate the effect of replacing spray dried porcine plasma protein with Probline^ⓡ the performance of weanling pigs. Ninety-six weaned piglets at four weeks of age on average were assigned to one of four dietary treatments; 6% plasma protein(T₁), 4% plasma protein and 2% Probline^ⓡ(T₂), 2% plasma protein and 4% Probline^ⓡ(T₃), and 6% Probline^ⓡ(T₄). All diets were formulated to have iso-caloric and iso-nitrogen levels and were fed to pigs for four weeks. Replacing plasma protein with Probline^ⓡ tended to decrease average daily gain (linear effect; p$lt;0.12) and significantly increased feed/gain (linear effect; p$lt;0.05), but no significant differences were observed in each t-test result between T₁ and T₂ or T₃. Concentration of IgG in serum increased in a linear (p$lt;0.01) fashion as the level of Probline^ⓡ increased in the diet. In conclusion, the result of this trial indicates that one third or two thirds of plasma protein in piglet diet can be replaced with Probline^ⓡ without a significant influence on the performance of weanling pigs.