• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.781-781
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• 2005

• The Journal of the Korean life insurance medical association
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• v.30 no.1
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• pp.24-47
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• 2011

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2016.09a
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• pp.139-142
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• 2016

• Proceedings of the Korean Society of Crop Science Conference
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• 2021.10a
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• pp.226-226
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• 2021

• Journal of East-West Nursing Research
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• v.13 no.1
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• pp.48-56
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• 2007

Purpose: This is a descriptive research to examine the levels of ADL, self efficacy, and life satisfaction of elderly institution residents, and the relations among the factors. Method: Data were collected through a questionnaire survey of elders aged over 65 at nursing homes in 9 areas throughout the country. Measures were the physical function scale, the general self efficacy scale, and LSI Z. Collected data were analyzed using SAS/PC11.0. Result: First, the mean levels of ADL, self efficacy, and life satisfaction were 2.83 (0.85), 2.79 (0.63), and 1.18 (0.42). Second, the relations among three factors were showed positive correlations. Third, (1) The level of ADL was statistically significantly different according to health condition, religious activity, volunteer activity, and friend meeting. (2) The level of self efficacy was statistically significantly different according to health condition, source of help, religious activity, volunteer activity, friend meeting, and elderly school & senior center. (3) The level of life satisfaction was statistically significantly different according to health condition, source of help, religious activity, volunteer activity, friend meeting, and elderly school & senior center. Conclusion: Conclusively, it is required to enhance ADL and self-efficacy in order to improve elderly institution residents’ life satisfaction.

• Journal of Mechanical Science and Technology
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• v.20 no.4
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• pp.473-481
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• 2006

Predicting fatigue life by numerical methods was almost impossible in the field of rubber materials. One of the reasons is that there is not obvious fracture criteria caused by nonstandardization of material and excessively various way of mixing process. But, tearing energy as fracture factor can be applied to a rubber-like material regardless of different types of fillers, relative to other fracture factors and the crack growth process of rubber could be considered as the whole fatigue failure process by the existence of potential defects in industrial rubber components. This characteristic of fatigue failure could make it possible to predict the fatigue life of rubber components in theoretical way. FESEM photographs of the surface of industrial rubber components were analyzed for verifying the existence and distribution of potential defects. For the prediction of fatigue life, theoretical way of evaluating tearing energy for the general shape of test-piece was proposed. Also, algebraic expression for the prediction of fatigue life was derived from the rough cut growth rate equation and verified by comparing with experimental fatigue lives of dumbbell fatigue specimen in various loading condition.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.12 no.3
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• pp.389-394
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• 2005

Purpose: This study was done to examine the relationship between life stress and depression, and the effect of social support of 100 Koreans living in the Phillippines. Theoretically social support is considered to mediate the relationship between lift stress and depression. Method: Data were collected from April 1 to May 30, 2002 and analysed using SAS. The first, two hypotheses were tested using Gamma, a measure of association for ordinal variables. Partial gamma was used to test the third hypothesis. Patterns of elaboration described by Babbie(1986) were selected to interpret the relationship of the three variables in the analysis. Results: 1) There was a positive relationship between life stress and depression(Gamma=.45, p=.017), and a inverse relationship between social support and depression(Gamma=-.561, p=.002). Thus the first, two hypotheses were supported. 2) When social support was controlled, the relationship between life stress and depression increased under the condition of low social support but with high social support, the relationship decreased. Conclusion: It can be interpreted that life stress is positively related to depression under the condition of low social support, however this relationship may be reversed with high social support.

• Child Health Nursing Research
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• v.5 no.2
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• pp.125-135
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• 1999

The purpose of this study was to identity the level of burden and quality of life of the subjects. The subjects of this study were 68 mothers of nephrotic syndrome patients who children hospitalized in 2 Pediatric wards of University Hospital in Seoul. The data were collected through a questionnaires and the period of the data collection was from August 1st to September 30th ,1998. The instruments for this study were Burden Measurement Instrument developed by Montgomery et. al (1985) and Quality of life scale designed by Ro, Yoo JA(1988). The statistical analysis was used by SPSS, t-test, ANOVA and Pearson correlation coefficient. The results of were as follows. : 1. The level of burden showed a mean score 54.47 and the level quality of life, a mean score 140.20. 2. The level of burden differed according to s religion, pt's purpose of admission and perceived patient's condition by mothers. 3. The level of quality of life differed according to perceived pt's condition by mothers. 4. There was a negative correlation between burden and quality of lifer =-3.97, p<.001).

• Advances in concrete construction
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• v.8 no.1
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• pp.55-64
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• 2019

Chloride corrosion has become the main factor of reducing the service life of reinforced concrete structures. The object of this paper is to propose a theoretical model that predicts the service life of chloride-corrosive concrete under fatigue load. In the process of modeling, the concrete is divided into two parts, microcrack and matrix. Taking the variation of mcirocrack area caused by fatigue load into account, an equation of chloride diffusion coefficient under fatigue load is established, and then the predictive model is developed based on Fick's second law. This model has an analytic solution and is reasonable in comparison to previous studies. Finally, some factors (chloride diffusion coefficient, surface chloride concentration and fatigue parameter) are analyzed to further investigate this model. The results indicate: the time to pit-to-crack transition and time to crack growth should not be neglected when predicting service life of concrete in strong corrosive condition; the type of fatigue loads also has a great impact on lifetime of concrete. In generally, this model is convenient to predict service life of chloride-corrosive concrete with different water to cement ratio, under different corrosive condition and under different types of fatigue load.

• Journal of the Society of Naval Architects of Korea
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• v.57 no.5
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• pp.254-261
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• 2020

The structural safety of hydraulic winch drum and the gears are estimated by the Finite Element Analysis (FEA) and the winch operation experiment. The mesh convergence test is performed and the applied force is the pressure on the drum converted from the rope tension in working condition. The stress of the drum calculated from the strain values of the winch operation experiment shows the agreement with that from the FEA. Most stress values are under the yield strength except for the small hole made for the wire rope fixation. The life of bearings in the drum is calculated using the life prediction formula with the reaction forces from the operation load. One of the two ball bearings shows the short life for impact condition, yet the real prototype winch system shows more life than the numerical value.