• Korean Journal of Childcare and Education
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• v.13 no.3
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• pp.103-119
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• 2017

Objective: This study investigated the relationships between preschoolers' difficult temperament, resilience, problematic behaviors, and maternal parenting stress. In addition, the research examined the moderating effects of resilience on the relationships between maternal parenting stress, preschoolers'difficult temperament and problematic behaviors Methods: The participants were 200 four to six year olds attending kindergartens and daycare centers in Seoul, Gyeonggi-do, or Gangwon-do. Mothers completed the questionaries to measure children's temperament, parenting stress, and problem behaviors. Children's resilience was assessed by teacher ratings. Results: Significant correlations were found among maternal parenting stress, preschoolers' difficult temperament and problematic behaviors. Moreover, resilience moderated the associations between difficult temperament and problematic behaviors but it did not moderate the relation between maternal parenting stress and problematic behaviors. Conclusion/Implications: The results suggest that it is necessary to provide comprehensive intervention to reduce maternal parenting stress and improve preschoolers'resilience in order to prevent their problematic behaviors.

• Korean Journal of Child Studies
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• v.31 no.2
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• pp.53-68
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• 2010

The purpose of this study was to explore the relationship between children's playfulness, the degree of preschool adjustment and behavior problems. The subjects were 118 children from 3 child care centers and 5 kindergartens in Kyungbuk province. Children's playfulness was measured through the children's playfulness scale (CPS) and the level of preschool adjustment was measured through the preschool adjustment questionnaire (PAQ). The modified version of Kim's (2000) Preschool Behavior Questionnaire (PBQ), created by Behar and Stringfield (1974) was used to measure the acceptability of children's behaviors. The regression and correlation analysis was performed through the use of SPSS 12, and the findings are as follows. First, there exists a meaningful correlation between the children's playfulness, the degree of preschool adjustment, and the acceptability of behavior problems. Second, the degree of preschool adjustment appears to be a reliable predictor of children's playfulness.

• Journal of electromagnetic engineering and science
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• v.13 no.1
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• pp.38-43
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• 2013

We derive the Z-parameters for the two coupled antennas used for wireless power transfer under the assumption that the antennas are canonical minimum scattering antennas. Using the Z-parameter and the maximum power transfer efficiency formula, we determine the maximum power transfer efficiency of wireless power transfer systems. The results showed that the maximum power transfer efficiency increases as the mode number or the radiation efficiency increases. To verify the theory, we fabricate and measure two different power transfer systems: one comprises two antennas generating $TM_{01}$ mode; the other comprises two antennas generating $TM_{02}$ mode. When the distance between the centers of the antennas was 30 cm, the maximum power transfer efficiency of the antennas generating the $TM_{02}$ mode increased by 62 % compared to that of the antennas generating the $TM_{01}$ mode.

• Korean Journal of Human Ecology
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• v.12 no.5
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• pp.659-668
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• 2003

The purpose of this study was to investigate the effect of children's peer-relationship and teacher-child relationship on the social competence. The subject of this study consisted of 115 children aged $4{\sim}5$ attending child care centers in Jeon-ju. Peer-relationship was assessed by the peer nomination measure. The teacher-child relationship and the social competence were evaluated by teacher's questionnaire. The results of this study were as follows : There were significant differences according to sex in teacher-child relationship and social competence. Social competences differed among popular, rejected and neglected children's groups. Teacher-child relationship significantly related with the social competence : The intimacy was positively and the conflict negatively related with the social competence. Intimacy, conflict, anxiety of teacher-child relationship accounted for 58% of the social competence variance. Intimacy of teacher-child relationship appeared to be the most important variable.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.11a
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• pp.191-194
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• 1998

In this paper, the physical and conductivity properties due to the electron beam irradiation for low density polyethylene using insulating materials of the distribution cable and ultra-high voltage cable are studied. The specimens of the low density polyethylene of thickness 100[$\mu\textrm{m}$] irradiated as each 1 [Mrad], 2[Mrad], 4[Mrad], 8[Mrad], 16[Mrad] and virgin are used in this experiment. In order to measure the conductivity properties, the micro electrometer is used, the range of temperature and app1ying voltage are 20 to 120[$^{\circ}C$], from 100 to 1000[V] respectively So. as a result of the conductivity properties, it is confirmed that the conductivity is increased nearly to 50[$^{\circ}C$], and is not changed until the crystalline melting point from the temperature over 60[$^{\circ}C$] because of the defects of morphology and the formation of many trap centers by means of electron beam irradiation

• Proceedings of the KIEE Conference
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• 2006.05a
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• pp.78-82
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• 2006

The Partial Discharge Monitoring System is technology which is available to measure & analysis the partial discharge of Power equipment. This technology is in the limelight as a pre-forecast system of equipment defect but there are some problems like no protocol standard, layered network management and the limitation of physical size. This paper presents whole system structure includes engineering centers, LN(Logical Node) to apply PDMS for, base-digital substation system, ICE61850 compatible Condition Monitoring &Diagnosis (CMD), Local Unit(LU), Intelligent Electronic Device (IED) for the solution scheme of these limitations.

• Korean Journal of Childcare and Education
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• v.14 no.1
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• pp.187-202
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• 2018

Objective: The study aims to examine fathers' parental stress and the variables effecting parental stress of fathers with infants. Methods: One hundred seventeen fathers with 0 to 2 year-olds were recruited from daycare centers in Daejeon metropolitan city. The Korean version of the Parenting Stress Index Short Form (K-PSI-SF) by Lee, Jung, Park and Kim(2008), The Korean Occupational Stress Scale-Short Form (Koss-SF) by Jang and Ko(2005), and the Revised-Kansas Marital Satisfaction Scale(RKMSS) by Chung (2004) were used to measure fathers'parental stress, occupational stress, and marital satisfaction. Results: First, the most influential variable that affected father's parental stress was their marital satisfaction. The fathers felt less parental stress when they felt higher marital satisfaction. Second, fathers felt less parental stress when their occupational environments were family friendly. Conclusion/Implications: Ways to improve mariatal satisfacation and a family friendly evironment at work should be sought out in order to lessen the parental stress of fathers raising infants.

• The Journal of Information Technology
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• v.9 no.3
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• pp.33-47
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• 2006

We will can do quality of measurement of service that thing is quite abstract concept. Generally, we speak Service of quality that property of a product, usability of use, social quality requirement to a quality of service by wide meaning. A purpose of this study was comparison regarding a way to measure of service quality, and in the insufficient section there was anything, and progress of model study of service left no matter how much focus to it. There is comparative study a few progress of literature of a PZB, SERVQUAL, SERVPERF, model. Desarbo, Huff, Rolandelli, & Choi, (1994: 125-131) proposed that to solve the above model contradiction point, and Presentation called a plan based on to Conjoint analysis. There is Critical point to decide on priority order of proposed model of service measurement. This study has a lot of the pieces which are short by absence of empirical study, but will make a supplementation in next term study.

• The Korean Journal of Community Living Science
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• v.23 no.3
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• pp.357-368
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• 2012

The purpose of this study was to investigate the influence of teachers' knowledge of infant development and efficacy of child care on perception of professionalism. The participants of this study were 264 child care teachers who were in charge of infants in child care centers in Gyunggi Province. Instruments to measure teachers' knowledge of infant development, efficacy of child care and perception of professionalism as teachers were used in this study and the data were analyzed by descriptive statistics, the hierarchical regression, and the structural equation model analysis by AMOS. Based on the hierarchical regression, efficacy of child care influenced on perception of professionalism rather than knowledge of infant development. The moderation effect of efficacy of child care existed in the relationship between teachers' knowledge of infant development and perception of professionalism.

• Korean Journal of Adult Nursing
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• v.22 no.4
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• pp.430-437
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• 2010

Purpose: The purpose of this study was to investigate the balance confidence and balance ability among community-residing stroke patients. Methods: The sample for this study was a convenience sample obtained from patients who visited welfare centers for the disabled in three cities from October to December in 2009. The Activities-specific Balance Confidence Scale and Berg Balance Scale were used to measure confidence in task performance and balance ability. Results: The level of balance confidence and balance ability were low in these subjects. There was a significant relationship between balance confidence and balance ability (r=.424, p=.000). Subjects with less balance ability felt less balance confidence. Conclusion: Among community-residing stroke patients, falls are common. Falls prevention which may contribute to the incidence of fall and fall related injury should be part of stroke rehabilitation plan. Also, it is necessary that an intervention for falls prevention after stroke should take into account factors such as the balance confidence and balance ability.