• The Journal of Economics, Marketing and Management
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• v.11 no.5
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• pp.1-13
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• 2023

Purpose: This study analyzed the factors that increase the satisfaction of local residents' housing and residential environment, and derived implications for housing suppliers and policymakers in local areas. Research design, data and methodology: The analysis method derived latent group types through latent profile analysis, and cross-analysis and covariate variance analysis (ANCOVA) were conducted to analyze the differences between these groups. Results: The analysis results are as follows. First, there are four potential group types: good neighborhood facilities and low-level surrounding environment 1 group, low-level neighborhood facilities and good surrounding environment 2 groups, overall low-level 3 groups, and overall high-level 4 groups. Second, groups 1 and 3 tend to live in relatively old apartments. Third, as a result of distributed analysis, groups with low accessibility to neighborhood facilities but good environmental conditions and groups with high overall levels had relatively high housing satisfaction. Conclusions: As an implication, we discussed the need for development that highlights natural environment-friendly characteristics as well as access to neighborhood facilities. In addition, in order to derive more specific implications, the direction of follow-up studies considering job linkage and the effects of specific and various environmental factors was presented together.

• International Journal of Advanced Culture Technology
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• v.12 no.2
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• pp.136-143
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• 2024

The purpose of this study is to analyze the mediating effects of major satisfaction, positive psychological capital, and job-Seeking Stress in the relationship between college students' self-directed learning and career preparation behavior. For this purpose, the study was conducted on 253 college students. The parallel mediation effect was analyzed using SPSS (24.0). Process Macro and Bootstrapping. The following results were confirmed. First, self-directed learning, major satisfaction, positive psychological capital, job-Seeking stress, and career preparation behavior were found to have a mutually significant influence relationship. Second, in the relationship between self-directed learning and career preparation behavior, major satisfaction, positive psychological capital, and job-seeking stress were confirmed to be variables that affect the parallel mediation effect and serial multiple mediation effect.Third, college students' self-directed learning was found to increase career preparation behavior through the mediating roles of major satisfaction, positive psychological capital, and employment stress. Therefore, in order to increase the career outcomes and success rates of college students, their own efforts, professors, and schools must create diverse environments and develop programs for college students' careers. Additionally, follow-up research must continue to supplement this.

• Ocean Systems Engineering
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• v.13 no.4
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• pp.401-421
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• 2023

Reducing hawser line tensions and dynamic responses to a certain level is of paramount importance as the hawser lines provide important structural linkage between 2 body TLP-TAD system. The objective of this paper is to demonstrate how MR Damper can be utilized to achieve this. Hydrodynamic coefficients and wave forces for two bodies including second-order effects are obtained by 3D diffraction/radiation panel program by potential theory. Then, multi-hull-riser-mooring-hawser fully-coupled time-domain dynamic simulation program is applied to solve the complex two-body system's dynamics with the Magneto-Rheological (MR) Damper modeled on one end of hawser. Since the damping level of MR Damper can be changed by inputting different electric currents, various simulations are conducted for various electric currents. The results show the reductions in maximum hawser tensions with MR Damper even for passive control cases. The results also show that the hawser tensions and MR Damper strokes are affected not only by input electric currents but also by initial mooring design. Further optimization of hawser design with MR Damper can be done by active MR-Damper control with changing electric currents, which is the subject of the next study.

• Structural Engineering and Mechanics
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• v.91 no.6
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• pp.627-642
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• 2024

In the present work, the deformation and stresses induced in a functionally graded disk have been reported for different loading conditions. The governing differential equation is solved using the classical method namely Navier's method by considering thermal and mechanical boundary conditions at the surface of the disk. To simplify solving the second-order differential equation, a plane stress condition was assumed. Following validation using a one-dimensional steady-state heat condition problem, temperature variations were computed for constant heat generation and varying conductivity. The research aims to investigate both the individual and combined effects of rotation, gravity, and temperature with constant heat generation on a hollow disk operating under complex loading conditions. The results demonstrated a high degree of accuracy when compared with those in existing literature. Material properties, such as Young's modulus, density, conductivity, and thermal expansion coefficient, were modeled using a power law variation along the disk's radius by considering aluminum as a base material. The proposed analytical method is straightforward, providing valuable insights into the behavior of disks under various loading conditions. This method is particularly useful for researchers and industries in selecting appropriate loading conditions and grading parameters for engineering applications, including aerospace components, energy systems, and rotary machinery parts.

• Structural Monitoring and Maintenance
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• v.11 no.3
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• pp.219-234
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• 2024

The strength reduction factor spectrum is traditionally obtained from a single-degree-of-freedom (SDOF) system with a constant damping coefficient. However, according to the principle of Rayleigh damping, the damping coefficient matrix of a system changes with the stiffness matrix, and the damping coefficient of an equivalent SDOF system changes with the tangent stiffness coefficient. In view of that, this study proposes an equivalent SDOF system with an adaptive damping coefficient and derives a standardized reaction balance equation. By iteratively adjusting the strength reduction factor, the corresponding spectrum with an equivalent ductility factor is obtained. In addition, the ratio between the strength reduction factor that considers adaptive damping and the traditional strength reduction factor, denoted by η, is determined, and the η-μ-T relationship is obtained. Seismic records of Classes C, D, and E sites are selected as excitations. Moreover, a nonlinear response time-history analysis is performed to establish the relationship between the η and T values for the equivalent ductility factor μ. Further, by exploring the effects of the site class, ductility factor, second-order stiffness coefficient, and period T on the mean value of η, a simplified calculation equation of mean η is derived, and η is used as a modified value for the traditional strength reduction factor R spectrum.

• Asia-Pacific Journal of Business
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• v.15 no.3
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• pp.189-204
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• 2024

Purpose - The purpose of this study was to examine the effects of corporate strategic deviance on firm value considering a firm's cost stickiness. Design/methodology/approach - This study used 40,823 firm-year observations from the Korean stock markets, KOSPI and KOSDAQ. Several multiple regression models were used in order to analyze the data Findings - First, unlike the previous results, corporate strategic deviation is positively associated with firm value. Second, the cost stickiness of a firm is positively related to firm value. Third, the interaction effect between strategic deviation and cost stickiness has negative relation with firm value. Fourth, An increase in standard deviation directly correlates with a decrease in firm value for firms with high levels of controlling shareholder ownership or that are part of chaebols. Research implications or Originality - Strategically deviant firms can experience an increase in firm value due to their future competitive advantage. Moreover, stickiness of costs generally has a positive impact on firm value. However, when firms with high levels of cost stickiness employ strategic deviant strategies, there is a risk of agency problems such as excessive overinvestment, which can negatively impact firm value.

• Journal of Korean society of Dental Hygiene
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• v.11 no.6
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• pp.951-959
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• 2011

Objectives : The author has studied the effects of behavior of preventive treatment on job satisfaction in dental hygienist. Methods : The hygienists who had worked from June 27th to August 1st in 2011 were explained about this research objectives and only the hygienists who agreed with this research participation were conducted a self-administered Questionnaire survey and the results were collected immediately. The collected questionnaire was 297, but the final 250 questionnaire were decided as a target except for the trustless ones. This analysis was extracted using SPSS(SPSS 12.0 for windows, SPSS Inc, Chicago, USA). Results : 1. Preventive treatment of dental hygienist was shown as this order - Educational needs 4.25, Importance 4.12, Usefulness 4.09, Perform 3.42. Job satisfaction was reached the moderate level. 2. Analysis of preventive treatment of hygienist was shown as this order - Basic brushing education 4.72 was ranked the highest, Taking patient history and Incremental dental health care 4.58 was held the second place. Dental caries activity tests 3.30 was shown the lowest figures. Response of preventive treatment conducting was like this order - Taking patient history 4.30, Dental prophylaxis 4.28, Basic brushing education 4.11, Incremental dental health care 4.04. Dental caries activity tests 2.05 was shown the lowest figures. 3. General characteristics in behavior of preventive treatment was resulted in this case that the respondents who have worked for less one year in current job than the ones who have worked for more than five years was shown such a low level, this was taken as a meaningful difference.(p=0.008) 4. It was shown that the higher fulfillment of preventive treatment(${\beta}$=0.340, p<0.001) and the greater earnings(${\beta}$=0.194, p=0.001) and usefulness of preventive treatment(${\beta}$=0.130, p=0.042), the higher job satisfaction. Conclusions : Considering these results, environment where the hygienists can concentrate on preventive treatment which is their proper job should be built up as soon as possible. And through this environment, the atmosphere where hygienists, as oral health professionals, can play a role to improve the oral health of the people by boosting job satisfaction should be created. Also It is thought that an institutional, actual improvement-changing the social awareness towards hygienists and dentists, the recognition of scope of the hygienists' work - should be established urgently.

• Korean Journal of Child Studies
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• v.2
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• pp.1-16
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• 1981

This study had two purposes. First, to examine the stages and developmental order of object permanence based on Piaget's theory. Second, to assess the effects of delay, attentiveness, and direction of gaze. Two experiments were conducted to examine the object permanence development in infants. The subjects for the 2 experiments were randomly drawn from a well-baby clinic. The subjects for Experiment 1 were 72 infants, 12 each in 6 age levels : 6, 9, 12, 15, 18, and 21 months old. Experiment 1 was designed to examine the stages and developmental order of object concept development, ana infants received 5 tasks as follows : (1) finding an object partially hidden under one box (2) finding an object completely hidden under one box (3) finding an object after successive visible displacements (4) finding an object after one invisible displacement (5) finding an object after successive invisible displacements. The subjects for Experiment 2 were 24 9-month-olds. Experiment 2 was designed to assess the effects of delay, attentiveness, and direction of gaze for Stage IV of object concept development. Subjects were equally assigned into one of two delay groups: 0-sec delay and 3-sec delay. Attentiveness was rated in terms of a three-point scale, and then divided into high and low attentive groups. Direction of gaze was judged into two directions. In two experiments, infants received three trials of task, and received a score of 0, 1, 2 for each trials. Data were analyzed by ANOVA, Tukey test, and t-test for task performance, and direction of gaze was analyzed by chi-square. The results obtained from two experiments were as follows : 1. In object permanence test, subjects obtained significantly higher scores with age, and 6, 9, 12, 18 months were classified into different developmental stages. 2. In object permanence development, subjects received significantly different scores with task and a developmental order of tasks was found. First of all, infants mastered finding an object partially hidden under one box, and then mastered finding an object completely hidden under one box. Contrary to Piagetian theory, in this study, the development of finding an object after successive visible displacements and finding an object after one invisible displacement were sometimes reversed. Finally, finding an object after successive invisible displacements was mastered, and the concept of object permanence was completed. 3. In Stage IV of object concept development, a 3-sec delay did not significantly affect the performance of tasks. The O-sec delay group didn't perform significantly better than the 3-sec delay group. 4. In Stage IV of object concept development, attentiveness of infants significantly affected the performance of task. So the highly attentive infants obtained better performance scores than the low attentive infants. 5. In Stage IV of object concept development, direction of gaze significantly affected the performance of task. That is, infants who gazed at the box which contained the object showed a higher rate of success than infants who gazed at the box which had already displaced the object.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.11
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• pp.473-480
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• 2018

This study is intended to look into the effects of children's forest math game activities on their understanding of number and space concept. To achieve this, an evaluation was carried out to 20 4-year-old children in each group - experimental group and control group - by an evaluation sheet after forest math game activities during a total of 16 sessions 4 times a week for 4 weeks. The findings are as follows. First, children's forest math game activities had an effect on their understanding of number and space concept. Second, the difference between experimental group and control group showed that the experimental group received higher evaluation in the classifying and order finding items than the control group. It was confirmed that classifying and order finding in the forest math game were factors to help children's mathematical problem-understanding abilities. This implies that their forest math game activities have a positive effect on their mathematical problem-understanding abilities. Consequently, active forest math game activities for children are needed to help them understand the concept of number in the process of classifying task objects and solving tasks in order.

• Journal of Science Education
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• v.47 no.1
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• pp.63-74
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• 2023

This study aims to investigate the effects of pre-service elementary teachers' scientific self-efficacy by science motivation according to the academic track in high school. The subjects of this study were 525 pre-service elementary teachers of which 350 pre-service elementary teachers were selected from the humanities and social sciences track in high school and 175 pre-service elementary teachers were selected from the science-engineering track in high school. In order to investigate the difference between scientific self-efficacy and science motivation among pre-service elementary teachers, Independent sample t-test and Cohen's d were done. In order to find out about the Influencing of scientific self-efficacy on science motivation, multiple regression analysis was used. The results of this study were as follows: First, there were statistically significant differences in scientific self-efficacy and science motivation, and the average of pre-service elementary teachers who selected science-engineering were significantly higher. Second, explanation power of scientific self-efficacy on science motivation appeared as 66.7~68.3%. The explanatory power of pre-service elementary teachers' who selected humanities and social sciences were higher. The relative importance was high in task difficulty preference factor to humanities and social sciences, was high in self-regulation efficacy to science-engineering. In conclusion, in order for pre-service elementary teachers to achieve high achievement and motivation in science subjects, and to teach science well to students in the school field, teacher education that can improve scientific self-efficacy should be conducted.