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산업장 중간관리자의 건강증진 행위에 영향을 미치는 변인분석
김정남,박경민,류미경,홍외현 대한보건협회 2000 대한보건연구 Vol.26 No.4
The purpose of this study was to identify the major factors affecting performance in health promoting behavior among the Industrial supervisors. The subjects for this study were 130 Industrial supervisors employed in one electronics manufacturing plant in Gumi and were obtained by a convenience sample. Data were collected from April 9th to 16th, 1999 by structured questionnaires. Collected data were analyzed by SPSS Package Program. The results of this study are as follows. 1. The average score of performance in the health promoting behavior was 2.47; the range of the score was from 1.37 to 3.90. The variable with the highest degree of performance was self-actualization, whereas the one with the lowest degree was exercise. 2. In the relationship between demographic variable and performance in the health promoting behavior, the educational level showed statistically significant difference in the self-actualization of health promoting behavior and the period of service showed statically significant difference in the interpersonal relationship. 3. Performance in the health promoting behavior was significantly correlated with health conception, self-efficacy, perceived benefit and perceived barriers. 4. The most important factor that affects performance in the health promoting behavior was perceived barriers. The combination of self-efficacy, perceived barriers accounted for 20.5% of the variance in health promoting behavior. On the basis of the above findings, self-efficacy and perceived barriers in cognitive factors, were identified as the variables which explained the most part of the Pender's health-promotion model. Nursing strategies enhancing self-efficacy and perceived barriers which has most significant effect on health promoting lifestyle should be developed. Further research is required to find out the factors influencing Health Promoting Lifestyle of Industrial supervisors.
An experimental study on second harmonic generation of guided wave in fatigued spring rod
김정남,Bo Zhu,조윤호 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.9
Conventional ultrasonic inspection techniques especially ultrasonic guided wave and wave testing methods show excellent capability for evaluating the material integrity of the structures. The dominate characteristics of nonlinear guided wave testing are long-range testing and higher sensitivity through various modes selection, which are favorable for diagnosing micro-defects or micro-structural changes at early stage. In this study, nonlinear studies on the valve spring coil using nonlinear induced ultrasound conducted. The nonlinear guided ultrasonic test performed on four specimens subjected to the Nakamura fatigue test. Experimental results show that nonlinear parameters increase with increasing distance. In addition, the nonlinear parameters increased with increasing fatigue degree. This study suggests a method to diagnose early damage of machine structure in an appropriate way and it expected to prevent accidents of structures.