• Journal of Information Technology Applications and Management
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• v.28 no.3
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• pp.31-48
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• 2021

Knowledge is a key resource for organizations to gain and maintain competitive advantage. Therefore, it is important for organizations to motivate employees to share knowledge with each other in order to achieve optimal performance of knowledge resources. Despite the efforts of organizations to share knowledge, knowledge hiding is still prevalent among employees. In this paper, we want to analyze the factors that may cause more general and pervasive knowledge-hiding behavior in organizations through empirical analysis. The results of this study show that, first, the relationship between team cohesion and knowledge hiding has been verified differently depending on the sub-behavior of knowledge hiding : playing dumb, evasive hiding, and rationalized hiding. Team cohesion has been shown to significantly reduce the playing dumb and evasive hiding. On the other hand, it was shown that team cohesion did not have a significant causal relationship with rationalized hiding. Second, the moderating effect of ethical leadership has been statistically significant in terms of team cohesion and relationships with playing dumb and evasive hiding. In other words, the higher the ethical leadership, the stronger the negative relationship between team cohesion and knowledge hiding. Finally, the theoretical and practical implications of this paper and future research directions are discussed.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.8
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• pp.149-156
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• 2021

Gambling negatively affects the economy, and it brings unwanted financial, social, and health outcomes to gamblers. On the one hand, unemployment is argued to be a leading cause of gambling. On the other hand, gambling can cause unemployment in the second-order via gambling-induced poor health, falling productivity, and crime. In terms of significant effects, previous studies were able to establish an association, but not causality. The current study examines the time-sequence and contemporaneous causalities between lottery gambling and unemployment in Thailand. The Granger causality and directed acyclic graph (DAG) tests employ time-series data on gambling- and unemployment-related Google Trends indexes from January 2004 to April 2021 (208 monthly observations). These tests are based on the estimates from a vector autoregressive (VAR) model. Granger causality is a way to investigate causality between two variables in a time series. However, this approach cannot detect the contemporaneous causality among variables that occurred within the same period. The contemporaneous causal structure of gambling and unemployment was identified via the data-determined DAG approach. The use of time-series Google Trends indexes in gambling studies is new. Based on this data set, unemployment is found to contemporaneously cause gambling, whereas gambling Granger causes unemployment. The causalities are circular and last for four months.

• International Journal of Internet, Broadcasting and Communication
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• v.13 no.1
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• pp.123-133
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• 2021

We study confirmed the factors influencing the organizational culture(collective culture, development culture, rational culture, hierarchical culture) perceived by members of the organization and the manager's authentic leadership(self-awareness, balanced information processing, relational transparency, internalized moral perspective) on job crafting. In addition, the relationship between organizational culture and authentic leadership was empirically analyzed. In order to verify the hypothesis of the research model, the survey results of 269 parts were verified as follows using the statistical program of SPSS 24.0. First, the organizational cultures perceived by members of the organization, development culture and rational culture, showed positive (+) influence on job crafting. In other words, Hypothesis 1 established by the research model was partially adopted. Second, the group culture, development culture, and rational culture of organizational culture were statistically significant in the relationship between the hypothesis 2 organizational culture and authentic leadership. In other words, Hypothesis 2 was partially adopted. Third, the three hypotheses of authentic leadership (self-awareness, balanced information processing, relational transparency, and an internalized moral perspective) all showed positive (+) effects on job crafting. As a result of this study, it was possible to confirm the importance of the organizational culture that improves the job-crafting of the members of the organization and the strategic activation plan for authentic leadership. Therefore, the necessity of strategic human resource development for the development and application of programs to revitalize organizational culture and improve the manager's authentic leadership has emerged.

• Journal of Forest and Environmental Science
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• v.37 no.1
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• pp.69-78
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• 2021

This study aims to verify a difference between the years 2014 and 2019 of Uiryeong-Gil, which is operated by the Visitor-Reservation System, in terms of the cognition of system, operational effectiveness, and behavioral intention. The analysis is as follows. First, among the overall cognition of the Visitor-Reservation System, the satisfaction from - prevention for safety for accident, expansion to other parks, number of visitor restriction, and satisfaction with reservation method - increased compared to 2014. Second, among the effects of the Visitor-Reservation System operation, satisfaction shows differences in year-to-year levels in terms of resource protection, resource damage mitigation efficiency, natural experience opportunity, comfort of visit-environment, and prevention of illegal activities. Third, the analysis of the differences in the behavior of the Visitor-Reservation System showed that the satisfaction of visitors, revisit intention, and overall satisfaction differed per year. The results of this study are meaningful in that the Visitor-Reservation System is no longer the restriction, but the change in cognition for the protection of ecosystems and sustainable visiting in order to expand the Visitor-Reservation System into a sustainable policy.

• Atmosphere
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• v.30 no.4
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• pp.335-346
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• 2020

Three free parameters included in a cumulus parameterization are optimized by using micro-genetic algorithm for three precipitation cases occurred in the Korea Peninsula during the summer season in order to reduce biases in a regional model associated with the uncertainties of the parameters and thus to improve the predictability of precipitation. The first parameter is the one that determines the threshold in convective trigger condition. The second parameter is the one that determines boundary layer forcing in convective closure. Finally, the third parameter is the one used in calculating conversion parameter determining the fraction of condensate converted to convective precipitation. Optimized parameters reduce the occurrence of convections by suppressing the trigger of convection. The reduced convection occurrence decreases light precipitation but increases heavy precipitation. The sensitivity experiments are conducted to examine the effects of the optimized parameters on the predictability of precipitation. The predictability of precipitation is the best when the three optimized parameters are applied to the parameterization at the same time. The first parameter most dominantly affects the predictability of precipitation. Short-range forecasts for July 2018 are also conducted to statistically assess the precipitation predictability. It is found that the predictability of precipitation is consistently improved with the optimized parameters.

• Korean Journal of Childcare and Education
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• v.17 no.1
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• pp.65-84
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• 2021

Objective: The objective of this study was to investigate the mediating effect of children's emotional intelligence on teacher-child intimacy perceived by children and peer acceptance. Methods: The participants were 134 five-year-old children(71 boys, 63 girls) attending daycare centers and kindergarten in Seoul and Gyeong-nam province. Children were interviewed to measure teacher-child intimacy and peer acceptance. Teachers completed rating scales to measure children's emotional intelligence. Data were analyzed using descriptive statistics, Pearson's correlation coefficient, three step mediated regression analysis and a Sobel test. Results: The main results are as follows. first, there were significant positive correlations of teacher-child intimacy, emotional intelligence, and children's peer acceptance. Second, children's emotional intelligence had a partial mediating effect on teacher-child intimacy and peer acceptance. Conclusion/Implications: The results of this study demonstrates links between early teacher-child relationships and children's emotional and social development. In order to promote children's peer acceptance, it is necessary to build an intimate teacher-child relationship and to improve children's emotional intelligence based on that relationship.

• Korean Journal of Childcare and Education
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• v.17 no.6
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• pp.15-28
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• 2021

Objective: The purpose of this study was to examine the mediating effect of teacher emotional intelligence in the relationship between job environments and teacher efficacy. Methods: Participants of this study were 205 child care teachers from U-city. Correlation analysis between variables was conducted with the collected data, and regression analysis was conducted to verify the mediating effect of emotional intelligence in the relationship between the job environment of daycare centers and teacher efficacy. Results: First, there was a positive correlation between job environments, teacher efficacy, and teacher emotional intelligence. Second, job environments and teacher emotional intelligence had a significant direct effect on teacher efficacy and teacher emotional intelligence also had a significant indirect effect between job environments and teacher efficacy. Conclusion/Implications: The way to improve the quality of child care is to improve the quality of teachers. Among the teacher's competencies, it is very important to increase teacher efficacy. Teacher efficacy plays a very important role in the quality of childcare and the healthy development of toddlers and children. In order to increase teacher efficacy, policy support for the job environment and training support to increase teacher efficacy are considered necessary.

• The Journal of Korean Physical Therapy
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• v.33 no.1
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• pp.16-20
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• 2021

Purpose: This study examined the effects of the type of video contents used for action observations on the ability to control posture. Methods: The participants were 48 healthy adults. The two hands of the participants were crossed on both shoulders, and the other foot was placed in a straight line in front of the target to allow them to watch a video of the monitor. The videos were presented in random order with three video contents (natural, stable balance posture, and unstable balance posture) consisting of 30 seconds each. A 15-second resting time was given between each video. During action observation using various video content forms, the posture control ability was measured using a TekScan MetScan^® system. Results: The results revealed statistically significant differences in the area of movement and the distance by COP and distance by the type of action-observation videos, and the distance by the anteroposterior and mediolateral sides (p<0.05). The stable balance posture and unstable balance posture video showed significant differences in the distance by the COP, anteroposterior, and mediolateral distance. (p<0.05) Conclusion: This study suggests that choosing the contents of the videos is important during action-observation training, and action-observation training can help improve postural control.

• The Journal of Korean Society for School & Community Health Education
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• v.23 no.2
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• pp.1-11
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• 2022

Objectives: The purpose of this study was to identify factors affecting job satisfaction of Public Health Center Officials in rural area. Methods: The 345 survey samples were divided into public health center officials(n=56) and other serial officials(n=289). Data were analyzed with 𝑥², two sample t-test and regression analysis. Results: First, public health center officials showed a significantly higher job commitment and job satisfaction than other serial civil officials. Second, public health center officials showed the effect of only job commitment on job satisfaction whereas other serial civil officials showed the effect of both job characteristics and job commitment on job satisfaction Conclusion: In order to increase of job satisfaction and provide health education services to the community, it was necessary to improve of motivation and working condition of public health officials.

• Membrane and Water Treatment
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• v.13 no.3
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• pp.129-137
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• 2022

In this study, the removal of Ciprofloxacin (CPX) from aqueous solutions was investigated by a new activated carbon adsorbent prepared from orange peel (ACOP) with chemical activation using ZnCl₂. The physicochemical properties of orange peel activated carbon were characterized by proximate and ultimate analysis, scanning electron microscopy, BET surface area determination and Fourier transformation infrared spectroscopic studies. According to Brunauer-Emmett-Teller isotherm and non-local-density functional theory, the cumulative surface area, pore volume and pore size of ACOP were determined as 1193 m² g^-1, 0.83 cc g^-1 and 12.7 Å, respectively. The effects of contact time, pH, temperature and ACOP dose on the batch adsorption of CPX were studied. Adsorption equilibrium data of CPX with ACOP were found to be compatible with both the Langmuir and Freundlich isotherms. CPX adsorption capacity of ACOP was calculated as 181.8 mg g^-1 using Langmuir isotherm. The CPX adsorption kinetics were found to be harmonious with the pseudo-second-order kinetic model. Conclusively, ACOP can be assessable as an effective adsorbent for the removal of ciprofloxacin (CPX) from aqueous solutions.