• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.477-485
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• 2018

The purpose of this study was conducted to investigate the influencing factors on foreign workers's work-life balance and provide guidelines for interventions and strategies to increase work-life balance in foreign workers. This study was a secondary data analysis from the $4^{th}$ Korean Working Conditions Survey(KWCS). The sample included 179 foreign workers. Data were analyzed using SPSS 22 and AMOS 22. As a results, the hypothetical path model was a good fit. In the path analysis, health status, social support, work time, job satisfaction had statistically significant effects on foreign workers's work-life balance and these variables explained 24.9% of work-life balance. These results reveal the predictors of work-life balance in foreign workers. Therefore, we need the active support for work-life balance predictors.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.6
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• pp.637-643
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• 2011

The bond-based peridynamic model is able to capture many of the essential characteristics of dynamic brittle fracture observed in experiments: crack branching, crack-path instability, asymmetries of crack paths, successive branching, secondary cracking at right angles from existing crack surfaces, etc. In this paper we investigate the influence of the stress waves on the crack branching angle and the velocity profile. We observe that crack branching in peridynamics evolves as the phenomenology proposed by the experimental evidence: when a crack reaches a critical stage(macroscopically identified by its stress intensity factor) it splits into two or more branches, each propagating with the same speed as the parent crack, but with a much reduced process zone.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.8
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• pp.1332-1338
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• 1997

In the case of the transfer function for the secondary path is dependent on time, the on-line method which can model it is continuously must be applied to the active noise control technique. And the adaptive random noise technique among the on-line methods is effective in the narrow-band control. In this method, the signal to noise ratio between random noise for modeling and primary noise is low. Therefore, the estimations of transfer function will be prone to inaccuracies and the convergence time will be too long. Such imperfections will have an influence upon the performance of an active noise controller. In this study, t enhance the signal to noise ratio, the on-line method that is combined the conventional adaptive random noise technique and the adaptive line enhancer, is proposed. By using proposed on-line method, a rigorous system identification and control of primary noise have been implemented.

• Nuclear Engineering and Technology
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• v.55 no.1
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• pp.215-221
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• 2023

Proton treatment may deliver a larger dose to a patient's skin than traditional photon therapy, especially when a range shifter (RS) is inserted in the beam path. This study investigated the effects of an RS on skin dose while considering RS with different thicknesses, airgaps and materials. First, the physical model of the scanning nozzle with RS was established in the TOol for PArticle Simulation (TOPAS) code, and the effects of the RS on the skin dose were studied. Second, the variations in the skin dose and isocenter beam size were examined by reducing the air gap. Finally, the effects of different RS materials, such as polymethylmethacrylate (PMMA), Lexan, polyethylene and polystyrene, on the skin dose were analysed. The results demonstrated that the current RS design had a negligible effect on the skin dose, whereas the RS significantly impacted the isocenter beam size. The skin dose was increased considerably when the RS was placed close to the phantom. Moreover, the magnitude of the increase was related to the thickness of the inserted RS. Meanwhile, the results also revealed that the secondary proton primarily contributed to the increased skin dose.

• Education of Primary School Mathematics
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• v.25 no.4
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• pp.279-295
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• 2022

This study was conducted to present implications for mathematics education by identifying the structural relationship among personality, negative emotion, motivation, and career maturity that affects elementary school student's mathematical academic achievement. The participants conveniently sampled 179 students, from 4th to 6th graders enrolled in the same elementary school, and data on their psychological variables were collected in the form of secondary data. The hypothetical structural equation model established based on prior studies was verified with a two-stage approach based on the collected data. It was confirmed that construct validity and construct reliability were secured through assessing the measurement model. In addition, as a result of analyzing the path coefficient of the final structural equation model, five paths were found to be significant: 'personality→motivation', 'personality→career maturity', 'negative emotion→motivation', and 'negative motivation→mathematical academic achievement'. In particular, the path of 'negative emotion→negative motivation→mathematics academic achievement' that can be confirmed through the results needs to moderate negative emotions to improve mathematical academic achievement, and at this time, negative motivation should be considered together.

• The Journal of the Korea Contents Association
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• v.16 no.7
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• pp.552-565
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• 2016

This study aimed to examine the association between material hardship and alcohol use among low-income households in Korea, with particular attention to whether the association was mediated by family conflict and self-esteem. Using a nationally representative sample of 960 low-income households, this study conducted a path analysis to test a structural model liking material hardship to alcohol use through family conflict and self-esteem. The significance of indirect paths was tested by a Sobel test. This study found that experiencing material hardship was directly associated with low levels of coping skills for family conflict and low levels of self-esteem, but not with alcohol use. However, material hardship was indirectly associated with alcohol use through low levels of coping skills for family conflict as well as low levels of self-esteem. The findings of this study suggest that experiencing material hardship among low-income households would be a socio-structural stressor for alcohol use, particularly in that it increases secondary role and intra-psychic strains. Implications to address material hardship and alcohol use among low-income households were discussed.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.8
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• pp.735-746
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• 2020

This research is defined as a study regarding on structured and systematized of existing literature review of the intersection between intellectual property management, management and technology transfer offices (TTOs). It takes a deeper look at requirements within universities, scientific institutions and the business environment should be interconnected with each other. The literature review shows that TTOs have control over the process of knowledge transfer and they have contributed to improving the efficiency of the use of production and human resources. In this paper, authors proposed the methodological tools based on methodology model, which identified success factors for using project management in TTO between two countries - Kazakhstan and Spain. Further, we used methodology is focused on solving the problems of quantitative analysis based on the use of primary data, which allowed us to reach a huge number of respondents without any restrictions, and secondary data from statistical database. Findings and results are summarized at the end of article show that Kazakhstan is following the path of the Spanish experience. However, Kazakhstan can become more successful in commercializing scientific technologies and transferring knowledge and technologies. In turn, Spain can use the data from our analysis to work on barriers and improve the activities of TTOs.

• Korean Educational Research Journal
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• v.37 no.1
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• pp.47-66
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• 2016

The purpose of this study is to examine the analysis on the effect of incentive gap of teacher's merit-pay on organizational commitment and organizational citizenship behavior. The study verified the hypothetical path model and analyzed the effects of incentive gap of teacher's merit-pay, organizational commitment and organizational citizenship behavior. The subjects of the study are 762 elementary and secondary school teachers. The results of the study are as follows: Firstly, it was found that there are significant correlations among incentive gap of teacher's merit-pay, organizational commitment and organizational citizenship behavior. Secondly, incentive gap of teacher's merit-pay affects organizational commitment and organizational citizenship behavior. Lastly, S grade teachers of teacher's merit-pay are more organizational commitment and organizational citizenship behavior level were higher than A and B grade teacher. Therefore teacher's merit-pay have positive impacts to the teachers.

• Journal of the Korean Society of Propulsion Engineers
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• v.27 no.1
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• pp.37-48
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• 2023

In this study, performance analysis modeling of two spool mixed flow type turbofan engine according to steady-state and transient is performed. The target engine is selected as F100-PW-229 from Pratt & Whitney, and main engine components including fan, high pressure compressors, combustion, high pressure turbines, low pressure turbines, mixer, convergent-divergent nozzle are modeled. The cooling effect of turbine through secondary flow path are considered in engine simulation model. We develop in-house Matlab/Simulink-based engine performance analysis program capable of analyzing internal engine state and compare it with GASTURB which is generally used as a commercial engine analysis program.

• Journal of Digital Convergence
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• v.15 no.10
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• pp.579-588
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• 2017

The purpose of this study was to examine the effect of anxiety and depression on health-related QOL(Quality of Life) of middle aged women and to test hypothetical model of QOL. This study is a pathway analysis study using 1692 middle aged women whose age range is between 40 and 64. This study was performed as secondary analysis using the data from the 2015 Korean Social Psychological Anxiety Examination Survey. Data were analyzed using descriptive statistics, correlation analysis and pathway analysis. As a result, Stress, social support, aged preparation, self-esteem, anxiety, depression and QOL showed significant correlation. Anxiety was directly affected by stress(.21, p=.009) and social support(-.05, p=.046). Depression was directly affected by stress(.28, p=.016), social support(-.10, p=.008) and self-esteem(-.38, p=.039). Both anxiety(-.16, pp=.009) and depression(-.17, p=.011) had effect on QOL but depression was mediated by anxiety in affecting to QOL. Anxiety and depression of middle aged women affect to QOL and QOL is affected by depression via anxiety. It suggests that it needs to provide nursing intervention for mental health such as anxiety and depression for QOL of middle aged women.