• Journal of the Korean Society for Nondestructive Testing
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• v.34 no.1
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• pp.38-43
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• 2014

An experimental method based on flexural wave propagation is proposed for identification of structural damage in rail fastening systems. The vibration of a rail clamped and supported by viscoelastic pads is significantly influenced by dynamic support properties. Formation of a defect in the rail fastening system induces changes in the flexural wave propagation characteristics owning to the discontinuity in the structural properties. In this study, frequency-dependent support stiffness was measured to monitor this change by a transfer function method. The sensitivity of wave propagation on the defect was measured from the potential energy stored in a continuously supported rail. Further, the damage index was defined as a correlation coefficient between the change in the support stiffness and the sensitivity. The defect location was identified from the calculated damage index.

• Applied Chemistry for Engineering
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• v.7 no.4
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• pp.750-756
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• 1996

$TiO_2$ was dispersed in zeolite and glass filter by soaking them in isopropanol solution of titanium tetraisopropoxide and drying in the air, followed by calcination at $500^{\circ}C$. The analysis of chlorothalnoil was carried out by gas chromatograph with an electron capture detector. Chlorothalnoil was degraded photocatalytically over the matrix-supported $TiO_2$ efficiently and could be completely photodegraded after 3hrs. Production were 5.0ppm of $Cl^-$ for $TiO_2$ supported zeolite, 7.5ppm of $Cl^-$ for $TiO_2$ supported glass filter and 2.0ppm of $Cl^-$ for $TiO_2$ powder. But, $CN^-$ was lower than the detection limit irrespective of matrices.

• Journal of Digital Convergence
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• v.14 no.8
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• pp.331-342
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• 2016

The great attention has been shown the importance of human resource management in medical institutions. At this point, studies have stressed employees' psychological factors for maximizing their job performance and minimizing their turnover intention and burnout. This study, therefore, empirically examines the mediating effect of social support on the relationship between emotional labor, burnout, and turnover intention of medical institutions, focusing on nurse practitioners to contribute to hospital management for developing valuable strategies in the human resource sector of medical employees. The empirical results demonstrate: 1) the relationship between emotional labor and burnout of nurse practitioners is mediated by social support; and 2) the relationship between emotional labor and turnover intention of them is mediated by social support. This research results show that more understanding of nurse practitioners' psychological factors in response to decrease their burnout and turnover intention for developing human resource management of nurse organizations. Furthermore, the study could suggest efficient management ways of hospital through interdisciplinary human resource management in terms of business administration and psychology.

• Journal of KIISE
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• v.42 no.2
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• pp.227-234
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• 2015

This paper proposes a modified MI-SVM algorithm by considering data distribution. The previous MI-SVM algorithm seeks the margin by considering the "most positive" instance in a positive bag. Positive instances included in positive bags are located in a similar area in a feature space. In order to reflect this characteristic of positive instances, the proposed method selects the "most positive" instance by calculating the distance between each instance in the bag and a pivot point that is the intersection point of all positive instances. This paper suggests two ways to select the "most positive" pivot point in the training data. First, the algorithm seeks the "most positive" pivot point along the current predicted parameter, and then selects the nearest instance in the bag as a representative from the pivot point. Second, the algorithm finds the "most positive" pivot point by using a Diverse Density framework. Our experiments on 12 benchmark multi-instance data sets show that the proposed method results in higher performance than the previous MI-SVM algorithm.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.271-280
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• 2019

The purpose of this study was to examine how resilience, social support, perception of death and quality of death affect the bereavement adaptation. Data collection was collected from 2 April to 30 May 2018 by distributing self-reporting questionnaires to 236 people using the eyeball presentation method to those who experienced family history in B city and K area Data were analyzed with descriptive statistics and, t-test, ANOVA, and Pearson's correlations that used SPSS WIN 22.0 program and the analysis of control effect was made by using Hierarchical Multiple Regression Analysis. The result of degree of adaptation of the subject was 3.5, family resilience was 3.8 and 3.9 in the lower part. Social support was not significant. But family resilience, belief system, death perception and quality of death influenced bereavement. Based on the results of this study, it is necessary to bulid a social support network for bereavement families, to prepare for death, and to develop and program a systematic program for well-being to become a beautiful and dignified death.

• Journal of the Korean Data and Information Science Society
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• v.22 no.6
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• pp.1113-1121
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• 2011

Recently, a variety of data mining techniques has been applied in various fields like healthcare, insurance, and internet shopping mall. Association rule mining is a popular and well researched method for discovering interesting relations among large set of data items. Association rule mining is the method to quantify the relationship between each set of items in very huge database based on the association thresholds. There are three primary quality measures for association rules; support and confidence and lift. In this paper we consider some similarity measures with negative co-occurrence frequencies which is widely used in cluster analysis or multi-dimensional analysis as association thresholds. The comparative studies with support, confidence and some similarity measures are shown by numerical example.

• Journal of Digital Convergence
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• v.17 no.7
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• pp.15-26
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• 2019

The purpose of this study is to provide meaningful implications for the establishment and implementation of social welfare policies for one-person households and to investigate the structural relationship between social participation and social support of one-person householders on their quality of life. As a result of the analysis, it was found that there was a positive correlation between the three variables. The direct and indirect effects of social participation on the quality of life were significant, and the social support partially mediated the relationship between social participation and quality of life. Therefore, it will be necessary to establish a welfare policy system that can promote social support by improving the quality of life of one-person households by providing concrete and diverse ways to activate social participation. Subsequent researches should be dealt with a more in - depth qualitative research on the concrete realization of this.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.407-415
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• 2018

The purpose of this study is to investigate the effect of SNS addiction tendency and social support on cyber violence among college students. Data collection was conducted through a structured questionnaire for 330 college students and analyzed through SPSS 18.0 program. As a result of the analysis, SNS addiction tendency was low as $1.81{\pm}0.55$, social support was $4.00{\pm}0.78$ and cyber violence was $1.38{\pm}0.59$. There was a significant positive correlation between SNS addiction tendency and SNS posting frequency, and there was a significant negative correlation between social support and grade. Cyber violence increased as the tendency of SNS addiction increased, as social support decreased, and cyber violence decreased in the second and third graders compared to the first grade. For this purpose, it is necessary to strengthen cyber education and group counseling program suitable for college students and it will be necessary to make effort to raise self - control.

• Journal of Creative Information Culture
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• v.7 no.1
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• pp.53-67
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• 2021

This study The purpose of this study is to analyze the structural relationship among social support, job satisfaction, happiness, teacher efficacy. Participants were 249 teachers from teachers' training programs. Descriptive statistics analysis and path analysis were conducted. SPSS 22.0 and AMOS 21.0 were used. As a result of the analysis, it was found that teachers' social support had a significant effect on job satisfaction and happiness, and job satisfaction had a significant effect on happiness and teacher efficacy, but social support and happiness did not directly affect teacher efficacy. However, it was found that social support has a partial mediating effect through a sense of happiness through job satisfaction, and social support has a complete mediation effect through a sense of teacher efficacy through job satisfaction. This study is considered to be the basic data for preparing a plan to improve the teacher's sense of efficacy, an important factor in determining the quality of public education.

• Journal of Creative Information Culture
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• v.7 no.1
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• pp.31-41
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• 2021

This study aimed to investigate the status of happiness according to the background of teachers, and to find out the effects of social support and job satisfaction on teachers' happiness. For this, the data of 249 teachers participating in the teacher training were analyzed using the Google online survey. As a result, there was no significant difference in gender or career, but elementary school teachers were found to have higher happiness than high school teachers. All the sub-factors of social support and job satisfaction were found to have positive relationship with the happiness sub-factors. In addition, in terms of the effects of social support and job satisfaction on inner happiness, teaching consciousness, autonomy, and trustworthy alliance had a positive effect on inner happiness, and the trustworthy alliance, advice, teaching consciousness on external commitment, and social belonging, Autonomy, development, and innovation had a positive effect on self-regulated happiness. It is believed that there is a need to improve the happiness of teachers using the results of this study.