• Journal of the Korean Geosynthetics Society
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• v.6 no.1
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• pp.1-7
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• 2007

In order to improve the bearing capacity of soft ground for the purpose of getting a trafficability of construction vehicles, the geosynthetics-sandmat system has often been used. Yamanouchi had proposed the equation of calculating the bearing capacity about this kind of bearing mechanism, which has a soft ground-geosynthetics-sandmat system. The bearing capacity equation by Yamanouchi has been widely using in our country. However this equation includes an important contradictory concept because if the contact width of vehicles is incresed to reduce the contact pressure, the bearing capacity is decresed on the contray according to this equation. In order to investigate this contradictory concept, the bearing capacity test has been performed on the soft model ground with geosynthetics-sandmat system. From the test results about various kinds of models, the principle that explain the contradictory concept has been found and on the basis of this principle the new bering capacity equation has been proposed by modifying Yamanouchi equation.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.19 no.1 s.71
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• pp.47-54
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• 2006

In this study, an optimum support design problem is considered to minimize displacement of stacked plates under self weight condition. During the displacement analysis, several kinds of contact arise between the plates themselves and support bar. These can be easily considered if commercial analysis software, which provides capability to solve the contact problem, is used. It is found, however, that the computing time is extraordinarily long due possibly to the generality of the software and also to the ignorance of the control parameters used in the software. In this paper, the contact condition is imposed directly by the authors, while the software is used only to solve the ordinary displacement analysis problem. In this way, the computing time is decreased remarkably by more than 30 times, while yielding the same accurate results. Optimization is conducted based on this efficient analysis method to find minimum number of supporting bars using the response surface algorithm.

• Journal of the Korea Society of Computer and Information
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• v.20 no.2
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• pp.209-219
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• 2015

The aim of this study is to identify whether the stress of children has an impact on their game addiction and to verify the moderating effect of family support. The survey was conducted to the children who were 5th and 6th graders in Gwangju and Jeonnam. The responses from 564 subjects contacted subjects were analyzed. In accordance with the verification on the impact game addiction, Children's stress has a impact on their game addiction. In other words, higer stress was related to higer game addiction. The impact family support on their game addiction was analyzed. In accordance with the results, the family support had positive impact on their game addiction. It suggested that higher family support meant lower game addiction. The moderated effect of family support was analyzed. The family support had the control effect to reduce the negative effect of stress of children in to their game addiction. Implication of the study findings is discussed.

• Geotechnical Engineering
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• v.9 no.4
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• pp.37-44
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• 1993

Model pile tests in calibration chamber are performed in order to study the two factors that the pile bearing capacity is significantly influenced by. Those factors are the critical depth concept and the scale effect caused by pile diameters. Firstly, the predicted values of end bearing capacity from the various static formulae were compared with the measured ones from model pile tests. Secondly, the critical depth concept and the scale effect were investigated by using two different soil conditions in a series of calibration chamber tests : the one is uniform sand : and the other is weathered granites overlayered by sand. Main results obtained from the model tests can be summarized as follows : (1) The end bearing capacity was increased with pile penetration depth up to penetration ratio of 7 to 8 when the cell pressure is high, and the critical depth was observed in the current chamber tests with uniform sand layer , (2) The predicted end bearing capacities were mostly lager than the measured, and it was found that the differences between the predicted and the measured values became smaller as the pile penetration ratio was increased : (3) The end bearing capacity of the small diameter pile in weathered granites layer was mostly less than that of the larger pile, while in uniform sand layer it was vice.

• The Journal of the Korea Contents Association
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• v.13 no.9
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• pp.204-215
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• 2013

The purpose of the present study was to investigate the role of social support and hardiness on the relationship between parenting attitudes and subjective well-being. The participants of this study were 318 university students and analyses for this study was conducted by using SPSS 15.0 and Amos 7.0. The major results were as follows; Social support confirmed mediating variable between parenting attitudes and hardiness, and hardiness confirmed mediating variable between social support and subjective well-being. That is, parenting attitudes had some effect on subjective well-being through hardiness based on social support. Finally, the needs of development about the counseling and the education contents as a special intervention was discussed, and that contents were reflected social support and hardiness to be improved. Also, limitations and implications of subsequent further study were suggested in this research.

• Journal of Korea Multimedia Society
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• v.11 no.7
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• pp.1035-1042
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• 2008

The support vector machine, as a binary classifier, is known to surpass the other classifiers only in binary classification problems through the various experiments. Even though its theory is based on the maximal margin classifier, the support vector machine approach cannot be easily extended to the multi-classification problems. In this paper, we review the extension techniques of the support vector machine toward the multi-classification and do the performance comparison. Depending on the data decomposition of the training data, the support vector machine is easily adapted for a multi-classification problem without modifying the intrinsic characteristics of the binary classifier. The performance is evaluated on a collection of the benchmark data sets and compared according to the selected teaming strategies, the training time, and the results of the neural network with the backpropagation teaming. The experiments suggest that the support vector machine is applicable and effective in the general multi-class classification problems when compared to the results of the neural network.

• Korean Journal of Social Welfare Studies
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• v.49 no.4
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• pp.5-30
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• 2018

The purpose of this study was to develop and empirically evaluate a theoretical model that delineated the processes whereby parents' socioeconomic status affected students'academic achievement via parental support and students' ego-resilience. The proposed model was tested with the first and second wave of a cohort sample of the first grade middle school students from the Korean Children Youth Panel survey by using linear structural relations techniques. The results of analysis showed firstly that parents' socioeconomic status, parental support and students' ego-resilience directly affected the level of students'academic achievement with statistical significance. Secondly, parental support, the proxy of social capital of the family, was contingent upon the parents'socioeconomic status. Thirdly, in addition to its direct effect, parents'socioeconomic status gave indirect effect on students' academic performance through parental support and ego-resilience. Based upon these results implications for social work intervention were provided.

• The Journal of the Korea Contents Association
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• v.19 no.10
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• pp.421-431
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• 2019

This study aimed to verify the mediating effects of empowerment and social support in the process of parent-child relationship affecting the college adjustment. In this descriptive research, 219 university students were recruited as participants. Data collection was carried out from May to June 2019 via online survey. The results showed that parent-child relationship had significant direct effects on empowerment, social support, and college adjustment. Moreover, parent-child relationship had significant indirect effects on students' college adjustment via empowerment and social support. The indirect effect of empowerment was significantly higher than the indirect effect of social support with respect to the influence of parent-child relationship on college adjustment. It is necessary to improve parent-child relations and emotional intimacy through social support to promote the college adjustment of students. In addition, it is important to apply a program that can enhance empowerment, which is a powerful factor in college adjustment.

• The Journal of the Korea Contents Association
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• v.21 no.7
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• pp.587-600
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• 2021

The aim of this research is to verify the mediating role of optimism and self-efficacy on the association between social support and depressive symptoms on among college students. 329 college students answered the survey questionnaires which assessed their social support, depressive symptoms, optimism, and self-efficacy. The results revealed that the higher levels of social support predicted the lower levels of depressive symptoms, the higher levels of optimism, and self-efficacy. In addition, the higher levels of optimism and self-efficacy predicted the lower levels of depressive symptoms. Lastly, the mediation analysis indicated that optimism and self-efficacy mediated the negative relationship between social support and depressive symptoms. That is, college students who highly perceived social support reported higher levels of optimism and self-efficacy, which led to lower levels of depressive symptoms. Finally, the implication and limitations of the present research were discussed and the directions for developing research were suggested.

• The Journal of the Korea Contents Association
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• v.18 no.12
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• pp.263-271
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• 2018

The aim of this study was to investigate whether there is the relationship between husband support and depression mediated to connubial bliss in Korean married women. A total of 2,120 married women were selected from the database of the Fourth Korea Longitudinal Survey of Women and Families (KLoWF) in 2011-2012. By the structure equation model, among of the husband support, the husband awareness was regarded as the dominant factor related to depression in Korean married women. Then comes couple activity, visiting of parents and division of household labor in that order. This study suggests that husband support significantly associated with connubial bliss and depression in Korean married women. The above findings will help design policy plans to reduce the depression of married women in the nation.