• East Asian Economic Review
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• v.27 no.2
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• pp.89-114
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• 2023

This paper empirically examines how controlling strategic goods affects productivity by focusing on Korean industries from 2015 to 2019. We hypothesize that strategic goods control positively affects productivity because it promotes international trade by making up for market failures, building up national credibility, and stabilizing market environment; in turn, international trade contributes to productivity growth. The regression results are congruent with our hypothesis. The effects of strategic goods control on productivity were positive and statistically significant in general. These positive effects were more prominent in the group of industries that include strategic goods and, thus, are technologically intensive. The results also support that international trade is a key medium for the effects of strategic goods control on productivity. Consequently, our empirical results support government policy on strategic goods control, ensuring that strategic goods control can contribute to economic growth by reducing diplomatic friction and stabilizing the global market.

• Human Ecology Research
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• v.59 no.3
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• pp.325-340
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• 2021

The purpose of this study was to examine that multiple mediating effects of self-determination and self-efficacy in the relationship between the parental control and career maturity. In the study, 747 university students in Daegu, Busan and Seoul area were surveyed on their perceived level of parental control, career maturity, self-determination and self-efficacy. Data were analyzed using descriptive statistics, one-way ANOVA, and Pearson correlation analysis with SPSS 25.0 program, Hayes'Process Macro program and bootstrapping. The major results of this study were as follows; First, there were significant differences in college student's career maturity by grade, major, experience in career-related services and part-time job experience period. Second, there were significant correlations between parental control(behavioral control and psychological control), career maturity, self-determination and self-efficacy. Third, self-determination and Self-efficacy had multiple mediating effects in the relationship between parental control and career maturity. In conclusion, this study found multiple mediating effects of self-determination and self-efficacy in the relationship between parental control(behavioral control and psychological control) and career maturity. It was also found that parental behavioral control had a positive effect on career maturity by increasing self-determination and self-efficacy while parental psychological control had a negative effect on career maturity by decreasing self-determination and self-efficacy.

• Wind and Structures
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• v.12 no.3
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• pp.205-217
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• 2009

Aerodynamic flutter control for long-span cable-supported bridges was investigated based on three basic girder sections, i.e. streamlined box girder section, box girder section with cantilevered slabs and two-isolated-girder section. Totally four kinds of aerodynamic flutter control measures (adding fairings, central-slotting, adding central stabilizers and adjusting the position of inspection rail) were included in this research. Their flutter control effects on different basic girder sections were evaluated by sectional model or aeroelastic model wind tunnel tests. It is found that all basic girder sections can get aerodynamically more stabled with appropriate aerodynamic flutter control measures, while the control effects are influenced by the details of control measures and girder section configurations. The control effects of the combinations of these four kinds of aerodynamic flutter control measures, such as central-slotting plus central-stabilizer, were also investigated through sectional model wind tunnel tests, summarized and compared to the flutter control effect of single measure respectively.

• Korean Journal of Child Studies
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• v.35 no.3
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• pp.31-47
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• 2014

This study investigates the moderating effects of the teacher-child relationship on the relationship between young children's self-control and behavior problems. 150 young children aged 3, 4, and 5 and their 40 classroom teachers participated in this study. The results of this investigation reveal the following: (1) Young children's self-control is significantly related to behavior problems. (2) The teacher-child relationship (conflict, dependence, intimacy) is significantly related to young children's behavior problems. (3) The effects of self-control on young children's anxiety and withdrawal behavior are significantly moderated by conflict driven teacher-child relationships. (4) The effects of self-control on young children's aggression and impulsive behavior are significantly moderated by dependent teacher-child relationships.

• Korean Institute of Interior Design Journal
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• v.14 no.2 s.49
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• pp.135-141
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• 2005

Subsequent to major changes in workplace such as communication method, uncertain organizational environment, and globalizaiton, several studies in workplace have explored the effects of those changes on work outcomes. Especially, employees need to have the balance in working alone and working with others. The purpose of this study is to examine the effects of control over the physical environment by individuals and the effects of flexibility on individual and group work outcomes in the workplace, to examine the effects of distraction on work outcomes, and to suggest a interrelationships among variables. In this study, four hundred and nine questionnaires were collected from employees of three manufacturing corporations in Michigan, U. S. In order to explore the causal interferences among multiple relationships suggested in this study, path analysis was employed using Lisrel 8.54. The results indicated that control over the physical environmental features of the workplace positively influenced job satisfaction. The findings also supported the hypothesis that flexibility is positively related to task group cohesiveness. It was found that distraction was negatively associated with control and flexibility. However, it was not supported that control was positively associated with perceived performance. This study found control and flexibility in the workplace to be important. Some practical implications were suggested emphasizing that control and flexibility allow limited resources to be used in ways that permit individuals to work effectively within a changing work environment.

• International Journal of Quality Innovation
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• v.3 no.2
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• pp.46-56
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• 2002

The presence of imprecise measurement may seriously affect the efficiency of process control and production cost. A cost model is derived to determine the design parameters of the economic asymmetric $\bar{X}$ and S control charts including measurement errors. The effects of imprecise measurement on the performance of the economic asymmetric $\bar{X}$ and S control charts and production cost are examined for the case where the process mean and process standard deviation may change. Application of the proposed control charts is demonstrated through an example. Numerical examples illustrate the effects of imprecise measurement on the design parameters of the proposed control charts. It shows that the imprecision measurement may seriously affrct the ability of the proposed control charts to detect process disturbances quickly, change the sampling frequency, and increase the production cost compared to the control charts excluding measurement errors.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.465-476
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• 2021

This study considers both causal and control factors for explaining both contact and distribution of sexually explicit material and tests their interaction effects for examining buffering effects of control factors in causal process. This study examines the effect of low self-control, differential association with peers and patriarchy family environmental factor as causal factors. It also considers three control factors such as morality. legal punishment, and lack of opportunity and test interaction effect between causal and control factors in both contact and distribution cases. Using data from college students in Seoul, results show that the effects of all causal factors are significant in both contact and distribution of sexually explicit material and the effect of differential association is the most significant. However, their interaction effects between causal and control factors are different across contact and distribution cases. In the contact case, all interaction effects are not significant. It means that causal factors have independent effects and control factors have no buffering effects. However, in the distribution case, the interaction effects between low self-control and morality, between differential association and morality, between patriarchy family and punishment, and between patriarchy family and lack of opportunity are significant. Empirical implications are discussed.

• Journal of the Korean Statistical Society
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• v.26 no.1
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• pp.89-100
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• 1997

In this paper we are concerned with comparing ordered treatment effects with a control in a randomized block design with multiple observations per cell. Two nonparametric procedures for detecting which treatment are better than the control are proposed and compared. An example is given and the results of a Monte Carlo power study are discussed.

• The Journal of Industrial Distribution & Business
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• v.11 no.9
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• pp.37-47
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• 2020

Purpose: This study examined how interpersonal relationship abilities in the elderly affected anger control abilities, as well as the mediating effects of generativity in the relationships between interpersonal relationships, anger control abilities, and self-integration. Research design, data and methodology: The study consisted of randomly selected 300 elderly people currently residing in welfare centers for the elderly, senior citizens colleges, social welfare facilities and other centers in the Seoul or Gyeonggi area. SPSS 23.0 was utilized for this study. Results: Through this research, the effect of interpersonal relationships on anger control ability and self-integration was observed. Not only that, the effects of interpersonal relationship abilities on anger control and self-integration and the mediating role of generativity, was also closely examined. Conclusion: Anger control ability was found to have a direct positive effect on interpersonal relationship abilities. Anger control ability had a direct and positively correlated effect on self-integration. Additionally, ability to control anger was found to have a positive effect on generativity, and generativity was found to have a positive effect on interpersonal relationship ability, but it was not statistically significant. Anger control ability had a positive effect on generativity, and generativity had a positive effect on self-integration.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.31 no.1 s.256
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• pp.18-25
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• 2007

Linear motor is easily affected by load disturbance, force ripple, friction, and parameter variations because there is no mechanical transmission to reduce the effects of model uncertainties and external disturbance. These nonlinear effects have been reduced for high-speed/high-accuracy position control either through the better motor design or via the better control algorithm that can compensate the nonlinear effects. In this paper, a nonlinear adaptive control algorithm is designed and applied for the position control of permanent magnet linear synchronous motor. In order to estimate and compensate the nonlinear effects such as friction and force ripple, the estimation and the nonlinear adaptive control laws are derived based on the virtual control input and a suitable Lyapunov function. The proposed controller is evaluated through the computer simulations. The control algorithm is also implemented to a DSP board and interfaced to the PMLSM for verifying the realtime control performance.