• The Journal of the Korea Contents Association
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• v.13 no.7
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• pp.463-472
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• 2013

The purpose of this study is to examine the relationships among three factors such as the family health, school adjustment and internet addiction, and their subordinated factors. The research is going to clarify if school adjustment has mediating effect in the relationship between the family health and internet addiction. 371 of elementary school students resideing in Dadjeon-city completed questionnaires assessing family health, school adjustment and internet addiction. The sample variance-covariance matrix was analyzed using SPSS 18.0 and AMOS 20.0, the mazimum likelihood minimization function. The goodness of fit was evaluated using the SRMR, RMSEA and its 90% confidence interval, CFI, and TLI. The results are as follows: First, there were significant correlations among family health, school adjustment and internet addiction. Second, the subordinated factors in the family health, school adjustment, and internet addiction regulation are also closely related in the statistically significant positive relationship excepting school adjustment. After conducting the Covariance Structure Analysis to verify the mediating effect of school adjustment in the relationship between the family health and internet addiction, we found that it was appropriate to explain our findings with the structural equation model. when the family health has an effect on internet addiction, the school adjustment partially influences this process. Finally, educational implications and suggestions for future studies are addressed.

• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.64-76
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• 2020

The purpose of this study is to empirically analyze the mediating effect of job stress and Job engagement in job satisfaction between WFC(Work-Family Conflict) and quality of LMX(eader-member exchange) relationship of married female workers based on JD-R(Job Demands-Resources) model. A total of 945 people were targeted using the 7th panel data from the Korean Longitudinal Survey of Women and a structural equation model was used to verify the causal relationship and mediating effect of each variable using spss 23.0 and AMOS 21.0. As a result of the study, it was confirmed that WFC did not directly affect job satisfaction, and it was found that job satisfaction was negatively affected through job stress related to WFC. It was found that the quality of the LMX relationship had a positive effect on job satisfaction and reduced job stress, thus positively affecting job satisfaction. Job engagement was found to mediate the relationship between LMX and job satisfaction. This study is meaningful in that the search for multidimensional psychological and contextual factors that lead to job performance and job demands of married female workers are conducted.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.3
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• pp.11-19
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• 2009

At present, an intelligent transport system (ITS) is being actively introduced as an alternative plan to solve various transport problems, and a traffic information provision service, a field of ITS, is being provided to users through diverse media. However, the evaluation of how useful the traffic information provided to the road users is limited to a simple questionnaire, and the systematic evaluation about what factors affect the usefulness of traffic information has not been realized. Therefore, it is impossible to calculate user convenience occurring due to traffic information, This paper aimed to develop an index to evaluate user satisfaction levels with traffic information and develop a user satisfaction level model. A result of establishing a user satisfaction level model by executing a questionnaire survey for the analysis object of variable message sign (VMS), a representative information provision medium, showed that 'desire satisfaction', 'trust', 'understanding', and 'efficiency' have an effect. Of them, the 'understanding' showed the highest level, so it was seen that, in case of VMS, how easily the character, figure, expression, etc. provided in the information was understood by users has the biggest effect on the satisfaction level of the information. The next levels of effects on the satisfaction was in the order of 'user trust', 'efficiency', and 'desire satisfaction'.

• Journal of the Korea Concrete Institute
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• v.29 no.1
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• pp.43-51
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• 2017

As per current seismic design codes, diagonally reinforced coupling beams are restricted to coupling beams having aspect ratio below 4. However, a grouped diagonally reinforcement detail makes distribution of steel bars in the beam much harder, furthermore it may result in poor construction quality. This paper describes the experimental results of concrete coupling beam reinforced with high-strength steel bars (SD500 & SD600 grades). In order to improve workability for fabricating coupling beams, a headed large diameter steel bar was used in this study. Two full-scale coupling beams were fabricated and tested with variables of reinforcement details and aspect ratio. To reflect real behavior characteristic of the beam coupling shear walls, a rigid steel frame system with linked joints was set on the reaction floor. As a test result, it was noted that cracking and yielding of reinforcement were initially progressed at the coupling beam-to-shear wall joint, and were progressed to the mid-span of the coupling beam, based on the steel strain and failure modes. It was found that the coupling beams have sufficient deformation capacity for drift ratio of shear wall corresponding to the design displacement in FEMA 450-1. In this study, the headed horizontal steel bar was also efficient for coupling beams to exhibit shear performance required by seismic design codes. For detailed design for coupling beam reinforced with high-strength steel, however, research about the effect of variable aspect ratios on the structural behavior of coupling beam is suggested.

• Korea Journal of Hospital Management
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• v.12 no.3
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• pp.47-67
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• 2007

This paper aims at suggesting several ways lo change financial vulnerability and to improve managerial capability of local public hospitals (LPHs) in Korea through the identification of factors affecting profitability. Several findings of the research are as follows: To begin with, LPHs exhibited a statistically significant difference in their profitability from one another, according to tile analyses of their profitable margins from tile general characteristics. It depends on the number of hospitals in the area, the population of the hospital-built area, the number of competing hospitals, the number of staff per 100 beds, the opening of special clinic, the educational function, and the capacity of rooms. However, there was no variable in the managerial characteristics, presenting a significant difference, in contrast with hospitals which have been managed by private companies and made a great amount of profits. Second, according to the analyses of profit differences in behavioral effort-characteristics, a statistically significant difference was revealed upon the basis of the efforts to improve the clinic service, invite special patients, and shorten the period of being hospitalized. Third, the result of analyses about the difference of profitability from medical care and finance is statistically significant in the rate of labor cost, the rate of management cost, bed-occupancy rate, and the period of being hospitalized. Fourth, according to the analyses of the factors influencing the net profit ratio of the entire capital, Adjusted explanatory power(Adjusted $R^2$) was shown up to 65.2%, which is high. To compare the adjusted explanatory power stage by stage, the first stage model applying only two variables such as structural and strategic characteristics exhibited 23.8%, and the second stage model adding financial characteristics showed 51.5%. The explanatory power was much improved up to 65.2% when the third stage model incorporated the outcome of medical care performance. When the return on investment(ROI) was examined by using the multi-variate linear regression analysis at the final model of third stage, it was found that ROI had a positive relationship with the increase rate of patients, labor costs per doctor, and medical care rate of socially protected inpatients. However, it revealed that ROI had a negative relationship with the ratio of labor costs, the number of patients per managerial staff, and occupancy rate of rooms, respectively. The research suggests that in order for LPHs to increase profitability, LPH, should make efforts not only to attract patients to the hospitals without any discrimination of the patients depending on their financial status, but also to develop efficient management methods to reduce labor costs.

• Journal of Sasang Constitutional Medicine
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• v.11 no.2
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• pp.283-299
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• 1999

1. Purpose : Systemic injection of kainic acid in experimental animals induces the limbic seizure and structural damages in hippocampus and amygdala which resembles the changes in human temporal lobe epilepsy. The author performed this study to investigate the neuroprotective effects of Yuldahansotang, on the neurotoxicity induced by kainic acid in the hippocampus in rats. 2. Method : Kainic acid was administered intraperitoneally. And feeding with Yuldahansotang for 3 weeks after kainic acid administration. Seizure were induced in male mice (kainate 10-40 mg/kg i.p) and animals were sacrified at various time-points after injection. The experimental animals were sacrificed at 1, 2, 3day and 1, 3weeks while Yuldahansotang administrations. Seizure were graded using a behavioral scale developed in our laboratory. c-fos belong to immediate early genes(IEGs) known to have rapid and brief responses. And neuronal injury was assayed by examining DNA fragmentation using in situ nick translation histochemistry. 3. Results & Conclusion : Seizure severity paralled kainate dosage. At higher doses DNA fragmentation is seen mainly in hippocampus in area CA3, and variable in CA1, thalamus, amygdala within 24 h, is maximal within 72 h, and is large gene by 7 days after administration of kainate. And we can't see the expression of DNA fragmentation and c-fos in the mice what feeded by Yuldahansotang after 7 days from kainic acid administration. It is consequently suggested that Yuldahansotang may attenuate the kainic acid-induced neuronal degeneration and increase the immunoreactivity of hippocampus in mouse.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.10 no.2
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• pp.236-243
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• 1999

The purpose of this study were to factor analyze the 25-item Personal Resource Question-naire (PRQ)-Part II, a social support measure, and to establish construct validity for the instrument among adolescents by relationship found between perceived social support and the theoretically relevant variables of attachment, parent-child relationships, and coping, The sample was consisted of 451 college students, aged 18 to 24. According to the criteria used in this study a four-factor structure, which consisted of 15-items, resulting from a principal components analysis with an oblique rotation, best represented the multidimensionality of the PRQ-Part II of late adolescents in Korea. Evidence in support of construct validity for both the 15-item and 25-item PRQPart II was provided by statistically significant correlations found between the two scales and the theoretically relevant variable of attachment, parent-child relationships, and coping. With the findings of this study, the 15-item Korean version of the PRQ-Part II can be used in research and practice as a reliable and valid instrument measuring perceived social support for late adolescents in Korea.

• Management & Information Systems Review
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• v.32 no.5
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• pp.135-155
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• 2013

Corporate primary goal has shifted from profit-orientation toward broader socially motivated perspectives, over the recent year. According to this phenomena, extensive research have been conducted to assess the empirical association between CSR and firm value. However, the results of previous studies are largely indeterminate which are attributed to the ignoring various indeterminate variables between CSR and firm value. Specifically, the purpose of this paper verifies the empirical association between CSR and firm value with considering capital constraint as core moderator variable by using structural equation modeling(SEM). Main results of this paper are as follows. We find that firms with better CSR performance face lower capital constraint and capital constraint is significantly related to firm value in negative direction, also. The result suggest that better CSR performance is associated with superior stakeholder engagement, in turn, CSR initiatives leads to firm value creation. Also, the capital constraint still remain positive to firm value even if capital constraint is considered moderator variables. Our findings implicated that CSR literatures should consider moderator variables, such as capital constraint, which could be affected firm value.

• Korean Journal of Social Welfare
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• v.69 no.2
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• pp.63-88
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• 2017

This study was to find out the effect of emotional maltreatment by parents on revictimization of emotional maltreatment by peers targeting second-year students of middle school with depression and social withdrawal as mediating variables. To this end, those who experienced physical violence by parents or friends were excepted from panel data collected by National Youth Policy Institute (KCYPS) and data of 752 people who experienced emotional maltreatment by parents or peers were analyzed. Research hypotheses were verified by a utilizing structural equation model. The results can be summarized as follows: First, experiencing emotional maltreatment by parents has a direct impact on depression and social withdrawal. Second, it was found that depression has a direct impact on experiencing emotional maltreatment by peers while social withdrawal is significant in an indirect path affecting with depression as a mediating variable. Third, the multiple mediated effects of depression and social withdrawal were significant in the revictimization relationship between emotional maltreatment by parents and emotional maltreatment by peers. This means that emotional maltreatment by parents becomes a predictor in re-experiencing emotional maltreatment by peers. It also means that emotional maltreatment by parents has an indirect effect through psychological and emotional factors such as depression and social withdrawal rather than having a direct effect. Based on the results of this study, limitations of the study and suggestions for future research were discussed.

• Journal of the Korean Society of Propulsion Engineers
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• v.4 no.3
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• pp.64-73
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• 2000

The joint parts was composed of inner AL(aluminum) ring, FRP wedge and motor case which was manufactured by filament wound method. Where the motor case consists of helical and hoop layer. The finite element analysis was performed for the design variable of joint parts to improve the performance of motor case. Where the adhesive layer was modeled to elasto-perfect plastic material and the contact condition of AL ring and wedge was modeled by using the contact surface element of ABAQUS. And the sliding distance of AL ring and the hoop strain of composite case were compared to hydro-static test results to verify the accuracy of analysis results. When wedge and AL ring was perfect bonding, though the hoop strain of joint part was reduced, the maximum shear stress was occurred at the adhesive layer. Thus the adhesive layer had failed due to the high shear stress before the failure was occurred at the case. And as another design method, when wedge and AL ring was contact condition, the shear stress on adhesive layer was decreased. But the hoop stress of joint part increased due to the sliding behavior of AL ring. Finally, the fail was occurred at the composite case of joint part. The improved joint method reinforced by hoop layer to the joint parts under contact condition for wedge and Al. ring reduced the joint part's hoop strain by constraint the sliding behavior of AL ring.