• Journal of Fisheries and Marine Sciences Education
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• v.23 no.2
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• pp.290-301
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• 2011

The purposes of this study were to test differences in conflict-resolving strategies and emotional intelligence based on children's peer status, and to verify the discriminance of conflict-resolving strategies and emotional intelligence for peer status. 58 popular children and 52 rejected children from 4 elementary school were selected, and the data were analyzed with independent sample t-test and discriminant analysis. The research findings are as follows: First, negotiation- and cooperation-strategies (sub-factors of conflict-resolving strategy) and emotional intelligence showed statistically significant differences between popular children and rejected children, while other sub-factors of conflict-resolving strategy and sub-factors of emotional intelligence showed indifference between them. Second, negotiation- and cooperation-strategies among 4 sub-factors of conflict-resolving strategy and 5 sub-factors of emotional intelligence were the most discriminant predictors for children's peer status. The results suggest systematic teacher training and program for the rejected children's improvement of negotiation- and cooperation-strategies in their peer relations.

• The Journal of Asian Finance, Economics and Business
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• v.9 no.7
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• pp.249-260
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• 2022

The objective of this study was to investigate the impacts of working capital policy and strategy on a firm's performance including profitability and market value. By applying One-Sample T-Test, working capital investment and financing policies were classified into the three sub-policies and strategies: aggressive, moderate, and conservative, unlike previous studies using two sub- policies and strategies. The results showed that the SET-listed companies in all seven industry sectors primarily adopted an aggressive working capital investment policy and a conservative working capital financing policy, so-called as moderate working capital management strategy (MWS), at 49.40%. While the firms adopted and conservative working capital management strategy (CWS), 45.70%, followed by the aggressive working capital management strategy (AWS), at 4.90%. When examining the impacts among three-sub policies and strategies on a firm's performance, it was found that the conservative working capital financing policy led to the highest profitability and market value in all industry sectors. The findings also revealed that the aggressive strategy has no impact on a firm's performance in terms of profitability and market value.

• Journal of Korea Multimedia Society
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• v.24 no.5
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• pp.709-716
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• 2021

The current trend of entertainment programs is an "Sub-character." This study is to find out which strategies were chosen, considering the entertainment program "Hang Out With Yoo" as the beginning and front-runner of craze for Sub-characters. The following results were deduced: implementation of trendy characters, aggressive acceptance of growth narrative and expansion of episodes. The success or failure of an entertainment program depends on the implementation method of differentiated characters. At this point in time when Sub-characters are continuously developed, this program is meaningful in that it has presented the strategies for Sub-characters reflecting the demand of audience.

• Journal of Engineering Education Research
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• v.26 no.2
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• pp.32-44
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• 2023

This research aims to examine the role of writing self-efficacy in engineering students' writing metacognitive strategies and writing apprehension. To achieve this purpose, first, the relationships among writing self-efficacy, writing metacognitive strategies and writing apprehension were investigated. Second, the effects of writing self-efficacy, as perceived by engineering students, on writing metacognitive strategies as well as writing apprehension were explored. A total of 173 engineering students from one university in Korea responded to survey based on a three-variables scale. The findings were that, firstly, positive correlations between writing self-efficacy and writing metacognitive strategies were identified in terms of sub-factors of those two variables. Secondly, negative correlations between writing apprehension and writing self-efficacy, and between writing apprehension and writing metacognitive strategies, were identified in terms of sub-factors of those variables. Thirdly, writing self-efficacy predicted engineering students' writing metacognitive strategies' sub-factors and writing apprehension. The practical implications of these findings are discussed herein, with particular attention on education for promotion of writing self-efficacy and reduction of writing apprehension.

• Korean Journal of Child Studies
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• v.32 no.5
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• pp.121-134
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• 2011

The purposes of this study were to test the differences in communicative competence and conflict-resolving strategies between both popular and rejected children, and to thereby verify the discriminance of communicative competence and conflict-resolving strategies for both types of children. 52 popular children and 41 rejected children from among a pool of 202 6th grade elementary students were selected, and the data were analyzed by means of independent sample t-test and discriminant analysis. The research findings are as follows : First, listen up (sub-factors of perceiving), self-presentation, planning, and coding revealed statistically significant differences between the popular and the rejected children. Second, only negotiation and cooperation strategies revealed any statistically significant differences between the popular and the rejected children, while other sub-factors of conflict-resolving strategies indicated broad indifference between them. Third, it was only the factor of planning among 5 factors of communicative competence and 4 factors within conflict-resolving strategies which indicated that it was the most discriminant predictor between the popular and the rejected children. These results suggest that a comprehensive program is needed to improve the communicative competence and conflict-resolving strategies of rejected children.

• Clean Technology
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• v.22 no.3
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• pp.141-153
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• 2016

Numerous stationary NO_x emission sources have employed a suitable deNO_x technology that is typically selective catalytic reduction (SCR) of NO_x by NH₃ over V₂O₅/TiO₂-based catalysts with on-demand monolithic structures. These structured catalysts undergo a time-on-deterioration of deNO_xing activity on site. Thus, we need more efficient, more deactivation-tolerant, more economic deNO_x systems and for which, their performance management is essential. This review has covered details of strategies to successfully manage the performance of SCR catalysts and timely replace them to new or rejuvenated ones. Key considerations to maintain the catalyst activity will be reviewed. Details of the sequential addition of new catalysts and the replacement of life-end catalysts and their regeneration will be discussed with general guidances to determine the time for such a replacement. Finally, a better way to get more economic approaches to deNO_x system management will be proposed here.

• ETRI Journal
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• v.30 no.1
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• pp.81-88
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• 2008

The security threat posed by worms has steadily increased in recent years. This paper discusses the application of the optimal and sub-optimal Internet worm control via Pontryagin's maximum principle. To this end, a control variable representing the optimal treatment strategy for infectious hosts is introduced into the two-factor worm model. The numerical optimal control laws are implemented by the multiple shooting method and the sub-optimal solution is computed using genetic algorithms. Simulation results demonstrate the effectiveness of the proposed optimal and sub-optimal strategies. It also provides a theoretical interpretation of the practical experience that the maximum implementation of treatment in the early stage is critically important in controlling outbreaks of Internet worms. Furthermore, our results show that the proposed sub-optimal control can lead to performance close to the optimal control, but with much simpler strategies for long periods of time in practical use.

• Korean Journal of Exercise Nutrition
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• v.25 no.4
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• pp.10-16
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• 2021

[Purpose] The purpose of this study was to (i) assess hydration levels in elite male football players during a national team training camp before and during qualifying matches, (ii) evaluate the effect of coaching strategies for hydration based on feedback from hydration monitoring, and (iii) assess possible relationships between hydration status and training load or wellness markers. [Methods] Thirty-one male players (age 27±4 yrs; height 185±6 cm; weight 82.9±6.7 kg; body fat 10.4±2.3%) representing a national team from the Union of European Football Associations (UEFA) participated. The players were studied during three different national team training camps related to the UEFA Nations League tournament. Urine specific gravity (U_SG) was measured to assess hydration status. During all camps, the players were actively coached on improving strategies for hydration and given individual feedback on their test results. The training load was measured using GPS technology, and wellness questionnaires were completed. [Results] U_SG decreased progressively and significantly (p<0.005) during camp 1 and hydration status improved over the three camps, with fewer dehydrated and more well-hydrated players identified during the last part of camp 3. Significantly (p<0.05) higher U_SG values were observed 2 days prior to a match (MD-2) than on match day (MD); consequently, 52% of the players were dehydrated on MD-2 and only 6% on MD. No correlations were observed between hydration status and training load or wellness markers. [Conclusion] Dehydration is a challenge in elite male football, but continuous monitoring of hydration status and coaching on hydration strategies can lead to major improvements and reduce the degree of dehydration.

• Journal of Environmental Health Sciences
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• v.49 no.3
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• pp.149-158
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• 2023

Background: Injury is one of the major health problems in South Korea. Few studies have evaluated both intentional and unintentional injury when investigating the association between exposure to air pollutants and injury. Objectives: We aimed to explore the association between short-term exposure to ambient air pollution and years of life lost (YLLs) due to injury. Methods: Data on daily YLLs for 2002~2019 were obtained from the the Death Statistics Database of the Korean National Statistical Office. This study estimated short-term exposure to particulate matter with an aerodynamic diameter of <10 ㎛ (PM₁₀), particulate matter with an aerodynamic diameter of <2.5 ㎛ (PM_2.5), sulfur dioxide (SO₂), nitrogen dioxide (NO₂), carbon monoxide (CO), and ozone (O₃). This time series study was conducted using a generalized additive model (GAM) assuming a Gaussian distribution. We also evaluated a delayed effect of ambient air pollution by constructing a lag structure up to seven days. The best-fitting lag was selected based on smallest generalized cross validation (GCV) value. To explore effect modification by intentionality of injury (i.e., intentional injury [self-harm, assault] and unintentional injury), we conducted stratified subgroup analyses. Additionally, we stratified unintentional injury by mechanism (traffic accident, fall, etc.). Results: During the study period, the average daily YLLs due to injury was 307.5 years. In the intentional injury, YLLs due to self-harm and assault showed positive association with air pollutants. In the unintentional injury, YLLs due to fall, electric current, fire and poisoning showed positive association with air pollutants, whereas YLLs due to traffic accident, mechanical force and drowning/submersion showed negative associations with air pollutants. Conclusions: Injury is recognized as preventable, and effective strategies to create a safe society are important. Therefore, we need to establish strategies to prevent injury and consider air pollutants in this regard.

• Korean Journal of Child Studies
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• v.32 no.4
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• pp.99-113
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• 2011

This study examined natural groupings of mother-adolescents in terms of the sub-factors of problems in family communication. The natural groupings were as follows; the placating type, the blaming type, the super-reasonable type, and the inattention type. In addition, this paper also examined individual differences in trait anger and anger coping strategies patterns by clusters of sub-factors of problem in family communication. The subjects of this study consisted of 406 adolescents. Data were analyzed by means of cluster analysis and one-way ANOVA. The results from cluster analysis with the adolescent sample suggested the presence of four clusters ('placating-suppression', 'mixing up-confusion', 'authoritarian-hostility', 'consistent-repression'). Additionally, these four groups were found to be related to trait anger and anger coping strategies (anger-suppress, anger-out, anger-control).