• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.28_29
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• 2009

전력계통의 비접지 계통에 지락 고장이 발생하면 중성점 이동으로 고장이 발생하지 않은 건전상의 전위가 상승한다는 사실은 누구나 다 알고 있다. 이는 전기적으로 균형을 이루고 있는 계통에 지락 고장으로 상간 불균형이 초래되기 때문인데 보통 비접지 계통의 보호는 1상 지락 시는 고장전류가 거의 없기 때문에 영상 과전압을 이용한 한시 보호계전 방식으로, 2중 접지 시는 과전류 계전방식으로 보호 하고 있다. 그런데 고장전류가 없어 상대적으로 파급이 적을 것 같은 1상 지락고장 시 건전 상에 발생한 과전압이 또 다른 고장을 유발, 더 큰 고장으로 진전되어 많은 복구비용을 발생하게 하거나 예상치 못한 현상을 일으켜 고장원인을 분석하고 처리하는데 어려움을 초래하기도 한다. 본 논문은 발전소 비접지 계통에서 발생하는 중성점이동 현상에 대해서 논하고자 한다.

• Journal of Nutrition and Health
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• v.53 no.6
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• pp.596-612
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• 2020

Purpose: This study was conducted to evaluate the dietary behaviors of preschool children using the nutrition quotient for preschoolers (NQ-P) and investigate factors that influence NQ-P in preschool children. Methods: Subjects were 214 parents with children aged 3-5 years residing in Busan and Gyeongnam, Korea. The survey was conducted from March to April, 2019 using a questionnaire that included demographic characteristics, the NQ-P questions, and health consciousness. All data was statistically analyzed by the SPSS program (Ver 25.0) and the statistical differences in variables were evaluated by the chi-square test, Fisher's exact test, t-test, one-way ANOVA, and Tukey's multiple comparison test. Results: The mean score of NQ-P of the total subjects was 58.28, which was within the medium-low grade. The mean score of 'balance' was 60.08, 'moderation' was 47.64, and 'environment' was 67.83. The analysis of related-factors influencing NQ-P scores showed that there was a significant difference according to the frequency of dining out. The scores of the NQ-P (p < 0.05), moderation (p < 0.001), and environment (p < 0.05) were significantly higher in the 1-2 times per week group compare to 3-4 times and 5-6 times per week group. The scores of NQ-P (p < 0.01), environment (p < 0.01) were significantly higher in the high group of parents' health consciousness compared to the those with low health consciousness. Conclusion: According to the results of the evaluation by NQ-P, the dietary behaviors of preschool children residing in Busan and Gyeongnam need to be improved and monitored. For improving their eating behavior and nutritional health status, preschool children and their parents need proper nutrition education programs.

• Journal of Nutrition and Health
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• v.55 no.1
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• pp.155-173
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• 2022

Purpose: This study was undertaken to update the Nutrition Quotient for Elderly (NQ-E), which reflects dietary quality and behavior among Korean older adults. Methods: The first 29 items of the measurable food behavior checklist were obtained from a previous NQ-E checklist, recent literature reviews, and national nutrition policies and recommendations. One-hundred subjects (50 men and 50 women) aged ≥ 65 years living in the Seoul Metropolitan Area, including Gyeonggi Province, completed a pilot survey from March to April 2021. Based on the results of the pilot study, we conducted factor analysis and frequency analysis to determine whether the items of the survey were properly organized and whether the distribution of answers for each evaluation item was properly distributed. As a result, we reduced the number of items on the food behavior checklist and used 23 items for the national survey. Nationwide, 1,000 subjects (472 men and 528 women) aged > 65 years, completed the checklist survey, which was applied using a face-to-face survey method from May to August 2021. The construct validity of the NQ-E 2021 was assessed using confirmatory factor analysis, LISREL. Results: Seventeen food behavior checklist items were selected for the final NQ-E 2021. Checklist items addressed three factors: balance (8 items), moderation (2 items), and practice (7 items). Standardized path coefficients were used as the weights of items to determine nutrition quotients. NQ-E and three-factor scores were calculated according to the weights of questionnaire items. Conclusion: The updated NQ-E 2021 produced by structural equation modelling provides a suitable tool for assessing the dietary quality and behavior of Korean older adults.

• Journal of Nutrition and Health
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• v.52 no.2
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• pp.194-205
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• 2019

Purpose: The aim of this study was to evaluate the dietary behaviors of preschoolers in Daejeon using the Nutrition Quotient for Preschoolers (NQ-P). Methods: The study subjects were recruited from child-care centers and kindergartens located in Daedeok-gu, Daejeon between August and September 2018. A total of 411 preschoolers aged 3 ~ 6 years were included in the data analyses. A questionnaire of NQ-P, which consisted of 14 checklist items on dietary behaviors, was completed by the parents or guardians of the study subjects. The NQ-P scores and its three factors, including "balance", "moderation", and "environment" factors, were calculated according to sex, age, and weight status. Differences in the NQ-P scores and their factors according to sex, age, and weight status were tested using a student's t-test. Results: The mean NQ-P score of the total subjects was $58.5{\pm}9.2$, which was within the medium-low grade. The NQ-P score was $58.5{\pm}9.4$ in boys and $58.6{\pm}9.0$ in girls (p = 0.955). The NQ-P score was similar regardless of the age groups ($57.8{\pm}9.4$ in 3 ~ 4 years vs. $59.2{\pm}9.0$ in 5 ~ 6 years, p = 0.124), whereas subjects aged 5 ~ 6 years showed a significantly higher scores of environment factors than those aged 3 ~ 4 years ($67.9{\pm}16.8$ vs. $61.7{\pm}17.3$). The mean score of the moderation factor was lower in the overweight/obese children compared to the non-overweight/obese children ($46.6{\pm}13.3$ vs. $51.0{\pm}16.2$, p = 0.012). Compared to children aged 3 ~ 4 years, children aged 5 ~ 6 years had higher intakes of vegetable dishes and processed meat. The overweight/obese group showed a higher consumption of processed beverages than the non-overweight/obese group. Conclusion: The current study indicates that the dietary behaviors of preschoolers residing in Daejeon need to be improved. These findings suggest that nutrition education or health interventions targeting young children is necessary for improving their nutritional health status.

• Journal of Korean Society of Transportation
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• v.18 no.2
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• pp.91-101
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• 2000

The optimal congestion charge in transportation economics corresponds to the solution to the welfare maximization Problem for users of a certain road link where congestion takes Place. This congestion charge is in nature the optimal Price of the transportation facility, which is derived by the Partial equilibrium analysis on that facility. Therefore it is not certain that this congestion charge can maximize the well-being of all the users of the total transportation network, since the analysis does not count the impact of the congestion charge on traffic volumes of other links. This study suggests an alternative approach to estimate the optimal congestion charge. The key difference of this study from Previous ones is to derive the solution through the general equilibrium analysis on a market where several transportation facilities as well as Private goods are available to consumers. This approach shows a set of solutions a little different from the Previous one, which are explained below. The optimal congestion charge is derived for two different cases. One is the situation of which the congestion charge is levied on every transportation facility In this case, the optimal solution of each facility should equate the marginal utility of every user to the marginal cost of the corresponding facility. This analysis result in general equilibrium coincides with the Previous analysis result in partial equilibrium. However this result cannot apply to another case of which the charge is imposed only on a certain transportation facility. In this case, the optimal charge on a certain transportation facility should be less than the optimal congestion charge of partial equilibrium analysis.

• The Journal of the Korea Contents Association
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• v.16 no.12
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• pp.600-621
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• 2016

This study aims to develop and apply the language education program model - based on balanced language education approach - on development of literacy of young children in low-income families, specially participating in Dream Start public welfare service. Development of this languge education program was based on the basic view and characteristis of balanced language education. It was progressed in accordance with Analyze-Design-Develop-implement-Evaluate(ADDIE), which is an widely-used instructional design model. Educational contents including reading skills of picture books based on whole language approach and well-structured reading and writing sequences, teaching and learning method including the principles and the strategies and teaching and learning systematic evaluation method are proposed in viewpoint of balanced language teaching approach. The application of the program was conducted targeting 20 young children participating in Dream Start welfare service from June 2015 until early November. To evaluate the effectiveness of this program, word reading inspection and nonsense word reading inspection developed by Ko, Yeon-Kyung(2002) were performed. The reflective thinking journal of visiting teachers and the satisfaction reported by parents were analysed in the qualitative research method. As a result, reading skills of young children were improved. The superiority of the program - prefernce for the picture book, interests in written languages, effectiveness of individualized language education method - was demonstrated by qualitative analysis of reflective journal. This study has the significance on presenting the executable language education model for literacy development of young children in low-income families based on balanced language education approach.

• Journal of the Korea Society of Computer and Information
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• v.27 no.7
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• pp.145-152
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• 2022

Stroke results in balance disorders, these directly affect autonomy and gait ability. The aim of this meta-analysis was to determine the efficacy of proprioceptive neuromuscular facilitation on balance and gait. We included all randomized controlled trials assessing the efficacy of proprioceptive neuromuscular facilitation on balance and gait control in patients after stroke. This study was conducted according to the PRISMA guideline. Cochrane library, CINAHL, and PubMed were searched for studies published up to November 2021, and all randomized controlled trails(RCT) assessing PNF therapy were included. This analysis included only RCT. A total of 18 studies were selected from 1091 records obtained from the databases. The meta-analysis was performed using the R project for statistical computing version 4.0.2. The overall intervention effect was middle (standardized mean difference (SMD): 0.56) Additionally, berg balance scale (SMD: 0.48), functional reach test (SMD: 0.51), timed up and go test (SMD: 0.78), 10m walking test (SMD: 0.52), and dynamic gait index (SMD: 0.33) had medium effect sizes. The average Pedro scale was 6.63 out of 18, with a low risk of bias. These findings indicate that PNF is an effective therapy for improving balance gait in stroke patients.

• Journal of Venture Innovation
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• v.7 no.2
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• pp.153-173
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• 2024

In organizational behavior, the impact of leadership in organizations and employees' organizational citizenship behavior (OCB) have been two hot topics studied by scholars. However, previous studies have predominantly examined the organizational citizenship behavior of various generational groups. In the context of China's socialist market economy, it is necessary to study the OCB of state-owned enterprises (SOEs). Furthermore, employees' work-life balance in the context of SOEs' unique organizational cultures has also attracted much attention. Scholars have discovered that employees respond well to authentic leadership (AL). Although this observation has a theoretical basis, empirical research remains insufficient. Therefore, this study examined whether AL effectively promotes OCB among employees in SOEs. Additionally, we examined the mediating role of work-life balance and the moderating role of the adversity authentic and positive psychological capital. The research hypotheses were tested using 390 valid questionnaires from 60 teams using MPLUS 8.0. The results of the MPLUS study confirmed that AL promotes OCB. Work-life balance positively mediated between AL and OCB, adversity quotient positively moderated AL and work-life balance, while positive psychological capital positively mediated the impact of work-life balance on OCB. These findings provide empirical support for applying social exchange, adversity quotient, and resource conservation theories. Moreover, this study provides certain managerial insights through which managers can more effectively improve employees' professional behavior in SOEs.

• Journal of Family Resource Management and Policy Review
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• v.28 no.2
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• pp.51-63
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• 2024

This study aimed to identify the factors influencing the intentions of employed married women, aged 19 and above, with no prior experience of childbirth, to give birth to their first child. First, the intention of employed married women to give birth to their first child showed a moderate level of inclination, with slightly higher scores reflected in the subvariables of perceived marital value and perceived child value both within family values, while the effect of perceived gender role value was generally higher than the midpoint. Perception of work-life balance was generally a moderate influence, with the subvariable of balancing work and family being slightly higher than the midpoint in terms of influence. Second, the intention to give birth to a first child was clearly associated with the level of education and showed a positive correlation. However, this intention was negatively correlated with age, perceived child values, perceived marital values, and residential tenure. Third, pregnancy intention was influenced by age, educational level, perceived value of children, perceived value of marrriage, and work-life balance. This study provides meaningful assistance in understanding current low birth rate by gathering data on the preferences of married working women in relation to childbirth and by presenting the diverse perspectives of the women.

• Management & Information Systems Review
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• v.28 no.4
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• pp.229-252
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• 2009

The purpose of this study is to find out the determinants of knowledge management adoption through the analysis which examine structural relationships among knowledge management-based structure, knowledge management activities and business performance using the BSC(Balanced Scorecard) perspective. This study also gives the suggestion for the effective knowledge management implementation in the korean companies. This study has been conducted using the data collected from 91 companies implementing knowledge management. By analyses of the questionnaires, empirical results show that 3 factors of knowledge management-based structure, except organizational structure, have positive effect on knowledge management activities, and the implementation of knowledge management activities has positive effect on business performance with 3 perspectives of BSC, except financial performance. This study showed that more consideration are essential to obtain balanced business performance for companies with knowledge management adoption plan.