• Child Health Nursing Research
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• v.26 no.1
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• pp.55-63
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• 2020

Purpose: The purpose of this study was to evaluate the current level of sleep quality among Korean middle-school students using the Pittsburg Sleep Quality Index (PSQI), and to analyze the factors influencing sleep quality. Methods: The study used a descriptive cross-sectional design and a self-report questionnaire. The participants were 744 middle-school students. The questionnaire included the PSQI and health-related questions, such as the types of diseases they had been diagnosed with and the frequency of hospital admissions. The data were analyzed using the independent t-test, analysis of variance, Pearson correlation coefficients, and linear multiple regression. Results: The global PSQI score was 4.21, which indicated good sleep quality. The major factors that were associated with the sleep quality of middle-school students were the number of diseases they had been diagnosed with (β=.54, p=.001) and atopic dermatitis (β=.32, p=.001). In addition, asthma and the frequency of hospital admissions were significant factors influencing each component of the PSQI. Conclusion: The findings from this study suggest that sleep quality was associated with several health-related factors. Thus, nurses, school nurses, and nursing researchers may need to assess the health-related factors associated with adolescents' sleep quality as part of efforts to improve their sleep quality.

• Human Ecology Research
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• v.60 no.4
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• pp.507-520
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• 2022

The present study identified the effects of parents' work-family conflict on their and partners' co-parenting quality, as well as the mediating roles of co-parenting quality and children's executive function difficulties in linking parents' work-family conflict to their children's school adjustment. This study used data from 387 dual-earner parents and their first-grade elementary school children, who participated in the Panel Study on Korean Children. An actor-partner interdependence and mediation model analysis using structural equation modeling revealed the following findings: first, the actor and partner effects of parents' work-family conflict on co-parenting quality were significant for both fathers and mothers. Second, the effect of the fathers' work-family conflict on their co-parenting quality was found to be greater than that of the mothers' work-family conflict on the fathers' co-parenting quality. Third, fathers' and mothers' work-family conflict, respectively, exerted an indirect effect on their children's school adjustment through the serial mediation by the mothers' co-parenting quality and children's executive function difficulties, whereas the direct effects of fathers' and mothers' work-family conflict on children's school adjustment were not supported. Finally, this study suggests that co-parenting quality and children's executive function should be considered to facilitate children's school adjustment in the parent education of dual-earner families with first-grade elementary school children, and that continuous policy efforts for dual-earner parents' work-family balance are needed.

• Korean Journal of Child Studies
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• v.22 no.4
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• pp.99-113
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• 2001

In this study of the relationships between quality of children's friendships, their self-perception and school adjustment, 434 4th, 5th, and 6th graders replied to a series of questionnaires. Girls reported higher levels of quality of friendship in the areas of emotional security, help, intimacy, and acknowledgement than boys. Boys showed higher levels of self-perception in cognitive competence, athletic ability and social acceptance than girls. Positive friendship quality and friendship satisfaction were related to self-perception and school adjustment. Variables that influenced school adjustment were social behavior, cognitive competence, global self-worth, pleasure in companionship, and athletic ability. For boys, variables which influenced school adjustment were social behavior, cognitive competence, pleasure in companionship, and global self-worth. For girls, the variables were global self-worth, cognitive competence, trust, social behavior, and athletic ability.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.250-253
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• 2009

This paper presents NR (No Reference) Quality assessment method for IPTV or mobile IPTV. Because No Reference quality assessment method does not access the original signal so it is suitable for the real-time streaming service. Our proposed method use decoding parameters, such as quantization parameter, motion vector, and packet loss as a major network parameter. To evaluate performance of the proposed algorithm, we carried out subjective test of video quality with the ITU-T P.910 ACR (Absolute Category Rating) method and obtained the mean opinion score (MOS) value for QVGA 180 video sequence coded by H.264/AVC encoder. Experimental results show the proposed quality metric has a high correlation (84%) to subjective quality.

• Journal of Korean Society on Water Environment
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• v.22 no.3
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• pp.431-436
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• 2006

This study was conducted in the summer of 2005 in Shindong-myeon, Chuncheon-si, Gangwon-do to assess the quality of drinking water and to evaluate their potential pollutants. Ninety four water samples were collected from three classes of water supplies such as simple piped water, supplied own water and others (Supplied local water). Most residents used simple piped water (72.63%). 31.25% residents thought the water quality was bad and landfill was the main source of pollution that affected water quality. To correspond this perception, water quality was measured according to Drinking Water Quality Standard. The general bacteria, coliforms, and $NO_3-N$ exceeded the standard but the water qualities in these four areas were suitable for Drinking Water Quality Standard. The simple piped water showed low mean concentration of excess rate compared to supplied own piped water except general bacteria. Hardness, pH, and $NO_3-N$ showed significantly higher effects on drinking water quality. To evaluate the effect of effluent from landfill, water quality was measured according to distance and altitude. However, there was no effect of landfill effluent. To find out the effect of rainfall, we compared water quality of the year 2003 with that of 2005. The result showed significant differences in hardness and $NO_3-N$ concentration. This study confirmed that $NO_3-N$, coliforms, and general bacteria are main pollutant of water supply in rural community. Therefore, it is necessary to regularly maintain simple piped water supply, supplement sewer facilities, and educate residents about public health risk associated with drinking water in rural area.

• Child Health Nursing Research
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• v.16 no.3
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• pp.220-229
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• 2010

Purpose: The purpose of this study was to describe quality of life in school age children and the relationship between quality of life and parenting attitude as perceived by children and parent-child communication pattern. Methods: Data were collected between May 26 and June 3, 2009 using self-report questionnaires from 148 pairs of children and their parents. The children were enrolled in 4th to 6th grades. The questionnaires included the Parental Bonding Instrument (PBI), Parent-Child Communication (PCC) Scale, and Pediatric Quality of Life Inventory (PedsQL). The data were analyzed using the SPSS WIN 17.0 program. Results: The Quality of Life (QOL) score for the children was significantly higher among children reporting higher parental bonding attitude (mother r=.38, father r=.34) and parent-child communication (mother r=.43, father r=.36). Results of multiple regression showed that factors significantly associated with QOL were academic achievement, caregiver available after school, parent-child communication, school satisfaction, relationship with peers, and birth order among siblings. Conclusion: Positive relationships and good communication with parents and satisfaction with school life were important factors associated with quality of life in school age children.

• Journal of the Korea Fashion and Costume Design Association
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• v.19 no.1
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• pp.121-134
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• 2017

The purpose of this study is to investigate the effect of educational satisfaction on the school conversion intention according to the quality of university education service. To survey the perception of students majoring in Department of Beauty on both colleges and universities of beauty education, we distributed 600 questionnaires and utilized them as final analysis data except for 60 unreturned or defective papers. As a result of t-test and one-way ANOVA, there were differences among university education service quality, education satisfaction and school transfer intention. In addition, the effect of the quality of education service on the education service, the effect of the quality of education service on the school conversion intention, and the quality of the university education service influenced the school conversion intention. The results of this study suggest that, for the development of the beauty education, priority should be given to the facilities and equipments related to the beauty education as well as the importance of leadership and professional teachers and instructors.

• Journal of the Korean Society of School Health
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• v.30 no.1
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• pp.81-91
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• 2017

Purpose: This cross-sectional study was carried out to identify factors influencing the health-related quality of life according to socioeconomic level during early adolescence. Methods: Participants were 617 middle school students in $1^{st}$ and $2^{nd}$ grade. All measures were self-administered. Data were analyzed using SPSS 21.0 program and factors affecting the health-related quality of life were analyzed by t-test, ANOVA, Duncan test, Pearson's correlation coefficient, and multiple regression analysis. Results: According to the level of Family Affluence Scale (FAS), 19.1% of the participants were in the high class, 66.5% in the middle class, and 14.4% in the low class. We have found statistically significant differences among the high, middle, and low classes regarding the health-related quality of life, health perception, resourcefulness, family function, and social capital. The most influential factors of the health-related quality of life were found to be resourcefulness, family function, and social capital in the high and the middle class. Conclusion: The implication of this study is that it is important for the Education Ministry and middle school teachers to help adolescents develop internal coping resources as well as to develop school-curriculums considering social values and norms related to social capital in order to improving their health-related quality of life.

• 한국경영정보학회:학술대회논문집
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• 2007.06a
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• pp.851-856
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• 2007

Continuously monitoring and improving information system (IS) performance is a major concern in organizations. Thanks to invisible characteristics of IS performance, this is still enduring research question. The purpose of this study is to examine and analyze factors influencing IS Performance in public sector. Influencing factors of IS performance include IS quality such as System Quality, Information Quality and IS Use. The data for analysis was collected from local official in Korea. We used PLS 3.00 Version for an analysis. Analysis revealed that Information Quality has directly influenced IS Use. But there were not Significant in relations between System Quality and IS Performance, System Quality and IS Use, System Quality and IS Performance, and IS Use and IS Performance.

• Proceedings of the KIEE Conference
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• 2004.07c
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• pp.2090-2092
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• 2004

In this paper, the new measurement methodology of characteristics of the vibratory micro gyroscope using Quality factor and the resonant displacement was proposed. Because the Quality factor has a large error under the high Quality factor condition, it is difficult to analyze the characteristics of the vacuum packaged vibratory micro gyroscopes with the Quality factor. We analyzed mechanical characteristics of gyroscope with the value of Quality factor. We described measurement errors of mechanical characteristics of micro gyroscopes. The measured value of Quality factor is 47532 and error range of Quality factor is from -29.8 % to 73.9 %. The value of resonant displacement is 3.4${\mu}m$ and the measurement error is 2.9 %. From the result of Quality factor degradation and resonant displacement degradation, 1698 days and 1503 days were estimated as Time To Failure (TTF), respectively. The range of estimation error of Quality factor degradation and resonant displacement degradation is calculated from 1246 days to 1832 days and from 1456 days to 1537 days, respectively. We can analyze the characteristics of the vibratory gyroscope using the quality factor when the Quality factor is smaller than 10,000. Also we can analyze that using the resonant displacement when the Quality factor is larger than 10,000.