• Journal of the Korean Society of Hazard Mitigation
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• v.2 no.3 s.6
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• pp.119-125
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• 2002

The objective of this study is to evaluate elastic modulus of bridge-axis direction for optimum structure system in the cable-stayed bridge design. In numerical example of this study, a slight change in axis direction elastic modulus causes major modifications of the bridge characteristics when it is $1\times10^4$ tonf/m/bearing or less. Therefore, the elastic modulus was set at this lower limit of $1\times10^4$ tonf/m/bearing where the strength of the entire bridge system is still determined by girder strength and the entire system is insensitive to variations in elastic modulus. Besides, cable-stayed bridge with freely supported girders have slightly longer vibration periods in the horizontal direction for earthquake forces.

• The Journal of the Korea Contents Association
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• v.15 no.9
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• pp.285-294
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• 2015

Purpose: The purpose of this study was to identify the relationships between stigma, family support, and quality of life in tuberculosis patients. Methods: The participants were 122 who completed a questionnaire. The data were analyzed using descriptive statistics, t-test, and ANOVA. Results: The score of stigma I(community perspectives) was $18.67{\pm}7.48$ and the score of stigma II(patients perspectives) was $14.84{\pm}6.93$. The score of those with family support was $30.81{\pm}4.16$. The score of QOL was $102.22{\pm}13.72$. The findings showed significant positive relationships between stigma I and stigma II and between family support and QOL(r = .753, p < .001; r = .314, p < .001, respectively) and negative relationship between stigma II and QOL(r = -.250, p = .005). Conclusion: Further studies are needed to develop and evaluate the nursing interventions to support patients with tuberculosis, reducing their level of stigma and improving their quality of life.

• The Journal of the Korea Contents Association
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• v.15 no.4
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• pp.407-419
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• 2015

As the use of social media has gained mainstream popularity, concerns on the particulars of the users' motivation and method of use is on the rise. Under uses and gratifications approach, this study analyzes the use behaviors in Kakao-story, Facebook, and Twitter, and analyzes the changes in the perception of social support by the users of the media. Data was analyzed from 240 online questionnaire surveys. The study finds that the frequency of use of social media differs depending upon the personality of the users and their purpose of use, both of which also influence their type of use. It also finds that frequent use of social media increased the users' perception of social support, whereas their type of use had no effect with such perception. Communication behavior through social media seem to increase perception of social support.

• Journal of Navigation and Port Research
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• v.28 no.10 s.96
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• pp.861-867
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• 2004

Generally, a silicone rubber and a chloride polyethylene(CPE) have been used as a binder for high-performance composite EM( Electromagnetic) wave absorbers. In this study, the EM wave absorption abilities for natural lacquer which is newly suggested as a binder were investigated MnZn ferrite composite EM wave absorbers mixed with the natural lacquer were prepared and their absorption ability was also investigated. The prepared MnZn ferrite composite EM wave absorbers mixed with natural lacquer showed an improved EM wave absorption characteristics compared with MnZn ferrite EM wave absorbers mixed with the conventional binders. such as a silicone rubber and a chloride polyethylene(CPE). The matching frequency and the absorption ability of EM wave absorbers varied with the thickness of them.

• The Journal of the Korea Contents Association
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• v.18 no.3
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• pp.530-541
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• 2018

The purpose of this study was to examine the influence of the social exclusion factor of elderly people in a local community on their psychological wellbeing and whether or not social support would perform a mediating role in the relationship between social exclusion factor and psychological wellbeing. The subjects in this study were the elderly people who registered with a senior welfare center located in North Jeolla Province. The findings of the study were as follows: First, the social exclusion factor and social support factor of the elderly people were found to have exerted a statistically significant influence on psychological wellbeing. Second, the social support factor was found to have had partial mediating effects on the relationship between the social exclusion factor and psychological wellbeing. The findings of the study illustrated that the social support factor played a buffering role in the social exclusion factor that affected the psychological wellbeing of the elderly people.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.04a
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• pp.29-34
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• 2004

Generally, a silicone rubber and a chloride polyethylene(CPE) have been used for the development of high-performance composite EM(ElectroMagnetic) wave absorbers. In this study, the EM wave absorption abilities for natural lacquer which is newly suggested in this study as a binder for composite EM wave absorbers were investigated to develop an improved EM wave absorbers. In addition, MnZn ferrite composite EM wave absorbers mixed with the natural lacquer were prepared and their absorption ability was also investigated. MnZn ferrite composite EM wave absorbers which employs the natural lacquer as a binder showed an improved EM wave absorption characteristics in comparison with the conventional binder such as a silicone rubber and a chloride polyethylene(CPE). The matching frequency and the absorption ability of EM wave absorbers mixed with natural lacquer can be controled the change of the thickness of them.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.281-294
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• 2017

The purpose of this study is to analyze the structural relationship between social support and job stress variables affecting the exhaustion of child care teachers. The subjects of this study were 432 child care teachers who were working in child care centers. The collected data were analyzed by setting up a structural equation modeling via SPSS 21. 0 and AMOS 22.0 statistical programs. The main results of this study: first, social support directly affects child care teachers' job stress. Second, social support did not directly affect the burnout of child care teachers but indirect effect. Third, child care teachers' the job stress directly affect on child care teachers' burnout. As a result of the above analysis, it is necessary to strengthen the social support of the members and institutional support of the government.

• Journal of the Korean Geosynthetics Society
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• v.15 no.1
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• pp.37-46
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• 2016

Rotary pile consists a single or multiple helix plate and it is installed into the ground using the rotation of the helix plate. Rotary pile in soft ground is able to be supported by pile shaft and helix plate. When the pile is installed into hard layer relatively, the end bearing capacity is possible to be increased by the lower helix plate. In this paper, small-size rotary piles were manufactured with using steel pipe which is reduced to 1/5 size of the rotary pile on the construction field. Pile load test was carried out on the foundation soil which was formed by weathered soft soil. The bearing capacity of small-scale piles depends on the number of helix plate, the length of plate diameter, and an interval of plates, respectively. The bearing capacity of pile increases about 40% with 3 helix plate and it is also confirmed that the bearing capacity is improved about 10% as the increment of plate interval.

• Journal of the Korean Geotechnical Society
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• v.31 no.8
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• pp.39-49
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• 2015

In this study, a series of centrifuge tests were performed in order to observe the bearing capacity of waveform micropile, a new concept of micropile that uses a modified jet grouting process. A total of six models were considered, conventional micropile, jet grouted pile, and four different shapes of waveform micropiles. The test results indicated that the waveform micropile effectively contributes to the increase of the bearing capacity compared to the micropile without the shear keys. Among the waveform micropiles, the model that has a relatively small space between the shear keys showed the most significant improvement of load capacity. Additionally, the ultimate load capacities of all piles were compared using well-known estimation method. As a result, P-S curve method and total settlement method with 25.4 mm were considered suitable to account ultimate load for the waveform micropile.

• Journal of the Korea Society of Computer and Information
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• v.19 no.8
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• pp.151-160
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• 2014

This study synthetically investigated the relationship between social support and ego resilience, job satisfaction of the public health center workers providing medical service to local residents at the front. Unlike previous researches, this study took all variables of social support, ego resilience and job satisfaction into account, moreover, regarded it as important to verify mediated effect of ego resilience through influencing relationship between social support and job satisfaction. At the result of actual proof analysis via surveys, the social support of the public health center workers indicated the mediated effect on ego resilience and job satisfaction, besides, ego resilience influenced on job satisfaction and the mediated effect of ego resilience was also shown. Therefore, this study emphasized importance of the psychological satisfaction for the public health center workers as to provide residents better medical service based on the empirical testing result.