• Korean Parent-Child Health Journal
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• v.14 no.2
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• pp.76-83
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• 2011

Purpose: The purpose of this study is to compare the mother's rearing attitude and communication between mobile phone addiction group and non-addiction group in middle school students. Methods: A cross-sectional descriptive study was performed with 574 students from 3 middle schools (1 boy school, 1 girl school, 1 coeducation school) at G-city in Gangwon Province. The data was collected from the 10th to 24th of July in 2010. Statistical analysis of the results was carried out by means, frequencies, chi-square, t-test and multiple regression with SPSS/WIN 18.0 program. Results: There were significant differences in mobile phone addiction group and non-addiction group in regard to sex, school year, grades, mother' age, purpose of mobile phone use, activity after school, phone bill per month. Also There were significant differences in mother's rearing attitude and mother's communication between two groups. Conclusion: Mobile phone addiction among students is not serious, however, possibility of becoming an addict still remains. This study suggests that we have to educate them about proper mobile phone use in advance to prevent them from becoming a mobile phone addict in early stage. Therefore, we need to develop an educational program to prevent mobile phone addiction.

• Women's Health Nursing
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• v.10 no.1
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• pp.23-31
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• 2004

Purpose: The purposes of this study were to examine physical health and depression by women's employment status and role satisfaction, and to identify significant predictors for women's health status. Method: With a cross-sectional, correlational study design, a sample of study was consisted of 181 women who were employed or not employed whose child was attending an elementary school through convenience sampling. Data were collected with a structured self-administered questionnaire and analyzed by $X^2$-test, t-test, 2-way ANCOVA and hierarchical multiple regression analysis using SPSS program. Result: Employed women had poorer physical health than that of nonemployed women and women who had greater satisfaction as a parent reported better physical health and lower level of depression than who had lower satisfaction with covariates. Predictor for better physical health after controlling for covariates was being not employed, greater satisfaction with worker's role if employed, and greater satisfaction with parent's role. Women who had lower level of depression reported greater satisfaction with their social roles, but occupancy of multiple roles and role satisfaction as worker were not related to depression. Conclusion: Role quantity and role quality seem to be very important factors to maintain better physical and psychological well-being in women.

• Korean Parent-Child Health Journal
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• v.10 no.1
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• pp.36-47
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• 2007

Purpose: This study examined the relationship between sexual attitudes, sexual behaviors and self-esteem of male high school students in Busan. Method: A cross-sectional, descriptive study was conducted. Data were collected from four male high schools in Busan. Two hundreds boys were enrolled in this study. Descriptive statistics, t-test or ANOVA with Scheffe's test and Pearson's Correlation Coefficients were used for data analysis. Results: The mean sexual attitude($43.0{\pm}7.1$), sexual behaviorse($12.8{\pm}7.5$) and self-esteem($103.0{\pm}15.5$) were relatively low. The score of sexual attitude was affected by the subjects-parents relationship and sexual experience. The score of sexual behaviors was affected by religion, the subjects-parents relationship and sexual experience. The score of self-esteem was affected by the subjects's school record and the subjects-parents relationship. There was a positive correlation between sexual attitudes and behaviors, but the correlations between self-esteem and sexual attitudes, and self-esteem and sexual behaviors were not significant. Conclusion: Sexual attitudes and sexual behaviors of male high school students are changed openly and there is difference by a person's standard. An educational program may be needed to develope sexual attitude in high school students.

• Journal of Preventive Medicine and Public Health
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• v.53 no.6
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• pp.419-428
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• 2020

Objectives: Adolescent suicide is a global problem. This study aimed to identify associations between parental marital status and suicidal behavior. Methods: This study analyzed 118 715 middle and high school students from the 13th and 14th Korea Youth Risk Behavior Web-based Survey. The odds ratios (ORs) of suicidal ideation, planning, and attempts were calculated based on parental marital status, living situation, and socioeconomic factors. The data were analyzed using multiple logistic regression. Results: When compared to those living with 2 married biological parents, the ORs of suicidal ideation among adolescents living with either remarried or no parents were 1.34 (95% confidence interval [CI], 1.17 to 1.53) and 1.36 (95% CI, 1.11 to 1.66), respectively. For suicidal planning, the OR of those living with 1 remarried biological parent was 1.24 (95% CI, 1.01 to 1.52), and that of those living without parents was 1.28 (95% CI, 0.95 to 1.73), when compared to adolescents living with 2 married biological parents. For suicide attempts, when compared to adolescents with 2 married biological parents, the OR of those living with 1 remarried biological parent was 1.48 (95% CI, 1.17 to 1.87) and that of those living without parents was 2.02 (95% CI, 1.44 to 2.83). For adolescents living with 1 remarried biological parent, suicidal behavior was strongly associated with having no siblings and were weakly associated with not living with grandparents. Conclusions: Suicidal behavior among adolescents was associated with the remarriage and loss of parents. Therefore, special attention and interventions are needed for adolescents in those situations.

• Korean Journal of Child Studies
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• v.38 no.2
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• pp.133-148
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• 2017

Objective: This study focused on the stability and reciprocal effects between abuse and neglect by parents and adolescent depression and delinquency. We examined both parent and child effects by adopting the transactional model proposed by Sameroff (2009). Methods: Using autoregressive cross-lagged modeling, data from the $2^{nd}$ to the $4^{th}$ wave of the Korean Children and Youth Panel Study (KCYPS) were analyzed. The sample consisted of 1,982 adolescents who were $8^{th}$ graders in 2011. Data were collected at three different phases: when participants were in $8^{th}$ grade (T1), $9^{th}$ grade (T2) and $10^{th}$ grade (T3). Results: First, the effects of abuse and neglect by parents and adolescent depression and delinquency showed stability from the $8^{th}$ to the $10^{th}$ grade. Second, abuse at T1 and T2 had effects on adolescent delinquency at T2 and T3, respectively, but not on adolescent depression. In terms of child effects, abuse was influenced by adolescent depression only. Adolescent depression and delinquency had no reciprocal effects. Finally, there were reciprocal effects between neglect on one hand and adolescent depression and delinquency on the other. That is, there were child effects as well as parent effects. No significant effects were found in the reciprocal relations between adolescent depression and delinquency. Conclusion: The present study found the stability of abuse and neglect by parents and adolescent depression and delinquency. Furthermore, this study identified the child effects as well as parent effects, thus supporting the transactional model of neglect by parents and adolescent depression and delinquency.

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.330-345
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• 2016

The purpose of this study was the children learn character education situation and the desire of parents to recognize there is a purpose. In D city, the data collected was intended for 170 parents percentage of the frequency analysis SPSS program was performed multiple responses cross-validation analysis, and difference. As a result, first, it has the highest awareness of the need for Children Personality care and education of parents interest also highest. It was the concept of holistic education and character education Children can see that the same interpretation in the context of understanding the concept of Children education and Personality contents were understood as a whole. Second, these activities were Children Personality to training status could see that the character education are being made in this result assumed concentration of Children humanity education conducted in the home and work areas of daily life guidance and basic lifestyle at home talking It was made through the division. Children correct behavioral models for character education has given the values of the parent as the parent greatest impact on the formation of the Personality of children. Third, Children need for parent participation of character education should be made a parent education involvement in what is the result of Children character education out and it was found that it should be carried out life guidance program of parent education programs for Children character education.

• Journal of the Korean Society of Child Welfare
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• no.40
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• pp.41-71
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• 2012

The purpose of this study is to examine longitudinal impacts of various factors on happiness in primary school children. Specifically, attachment theory and ecosystems perspective were utilized for the purpose of this study. We used Korea Youth Panel Survey, which is a 5-year longitudinal data collected from fourth grade in elementary school to second grade in middle school Latent growth model was employed as the analytic method. The findings of this study are as follow: first, academic achievement, self-esteem, parent attachment, peer attachment, teacher attachment, and community attachment all decreased over the 5-year study period. Also, the intercept and the slope variance of variables were found to be statistically significant. This means that there are significant differences in the intercept and the slope of individuals. Second, self-esteem, parent attachment, and peer attachment were found to have cross-sectional influences on happiness. This means that self-esteem, parent attachment, and peer attachment are positively associated with happiness at the intercept. Also, self-esteem, parent attachment, teacher attachment, and community attachment were found to have longitudinal influences on happiness. This means that the higher levels of community attachment at the intercept is associated with slower the rate of decrease in happiness at the slope. In addition, faster rates of decrease in self-esteem, parent attachment, teacher attachment, and community attachment are associated with faster the rate of decrease in happiness. Third, this study conducted multiple group analysis with gender. The findings of this analysis revealed no significant differences in analytic models between males and females. Based on these findings, theoretical and practice implications with regard to happiness in primary school children are discussed.

• Korean Journal of Poultry Science
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• v.9 no.2
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• pp.63-101
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• 1982

A study was conducted to investigate the possibility of improving the effectiveness of the existing method(s) to estimate the edible meat weight in live broiler chicken. Four. breeds of chicken, white Cornish broiler chicks(parent stock), Single Comb White Leghorn(SCWL) egg strain chicks (parent stock), and two reciprocal cross breds of these parent stocks were employed in this study. A total of 480 birds, 60 male and 60 female chicks for each breed, were used. Ten male and 10 female chicks from each breed were randomly sacrificed at 0, 2, 4, 6, 8 and 10 weeks of ages in order to measure the body weight, edible meat weight of breast and 1eg(thigh and drum-stick), various components of body weight and various body shape measurements. In addition, chemical analyses of edible meat were carried out. Results obtained from this sturd were summarized as follows. 1. The average body weights of White Cornish broiler chicks and SCWL egg strain chicks were 1.82${\pm}$0.048kg(X${\pm}$S.E.) and 0.67${\pm}$0.029 kg. respectively, at 8 weeks of age. The feed to gain ratio for White Cornish and SCWL chicks were 2.24 and 3.28, respectively, for 0 to 8 weeks of age. The reciprocal cross bred chicks (White Cornish ${\times}$ SCWL) showed intermediate values in both parameters.

• Korean Journal of Plant Resources
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• v.28 no.1
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• pp.119-125
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• 2015

Interspecific crosses between rapeseed (Brassica napus L.) and chinese cabbage (B. campestris var. pekinensis Makino) and turnip (B. rapa L.) were made in order to examine the cross possibility and morphological phenotype of $F_1$ hybrid. The growth of pollen tube of cross between rapeseed and chinese cabbage was more rapid than cross between rapeseed and turnip. Silique formation and seed setting in silique were relatively high in the cross between rapeseed and chinese cabbage. The percentage of silique set from interspecific cross between rapeseed and chinese cabbage was 90.6% and higher 23.3% than the percentage of silique from interspecific cross rapeseed and turnip. The average number of seed per silique obtained from the cross rapeseed and chinese cabbage, and rapeseed and turnip reached 15.5 and 11.6, respectively. The morphological phenotypes of $F_1$ hybrid plants obtained from seeds in the cross between rapeseed and chinese cabbage resembled rapeseed mainly, but leaf length and leaf width were increased. The size, shape and lobation of leaves of $F_1$ hybrid plants from interspecific cross between rapeseed and turnip were intermediated between their parent species, but color of leaves was dark-green.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.4
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• pp.464-469
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• 2015

This study was carried out to find relationships of genetic distance and heterosis expression degree in the developed CNU waxy corn lines. The used material were developed in Corn Breeding Laboratory, Coll. of Agri. & Life Sci., CNU. Total 10 primers used for SSR maker analysis. In genetic distance, the used lines divided into four groups; A group has two lines, B group has one line, C group has ten lines and D group has eleven lines, respectively. Among used lines, CNU427 and CNU588 were very closed as a 74, while CNU451 and CNU429 were remote as a 40 inbred coefficient, respectively. While heterosis degree were very variable not only hybrids but also cross parents. Average heterosis of most cross-parent was high in plant height, ear height, flowering day and ear length. Especially, CNU H09-23 hybrid was high as 79.4% than other hybrids. Here, we gained the fact has closely relationship between genetic distance and heterosis.