• Korean Journal of Ecology and Environment
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• v.38 no.1 s.110
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• pp.83-94
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• 2005

The objective of the study was to elucidate early life history of Rhinogobius brunneus, based on laboratory observations and field works, along with its courtship and spawning behaviors. The male and female fish matured were sampled for the lab experiments from Gap-Stream, which is one of the tributaries of Geum-River, Korea. The spawning behaviors and courtship of matured adults had a typical pattern; matured males of Rhinogobius brunneus built up spawning nests and had their own territory before the spawning, and the behavior then triggered the egg spawning of female with active courtship. The females attached elliptic egg mass as a single layer, on the stones below the spawning nest. After the spawning, the egg mass was guarded by males only until the hatching. The size of egg fertilized, measured by microscope was about 1.5${\pm}$0.1mm in length and 0.7${\pm}$0.1 mm in the egg's width. According to the lab experiments conducted under four temperature regime, the lapsed time for the hatching was shortened as temperatures increased in the treatments. On the contrary to the hatching time, the average length of newly hatched larvae showed a reverse relation with water temperature. The larvae, considered a final stage of the early life history was about 3.6 mm in total length for water temperature of $18^{\circ}C$, whereas they were between 3.1 mm and 3.2 mm for over $25^{\circ}C$. This indicates that higher water temperature may decrease the growth rate in the early life history. These results may provide valuable information for the population conservation and ecosystem protection under accelerated water pollution and habitat degradations in Korea.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.7 no.1
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• pp.14-22
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• 1996

This study aims to look at main problems of visiting the clinic, diagnoses and other related factors of outpatients in a private psychiatric clinic f3r children and adolescents located in Seoul. The analyses were based on the reports of 2,785 patients who were 18 years old and less, and visited the clinic during last 4 years. The results showed that the ratio of boys to girls was 2.7 to 1, and about 64% of the whole sample were 6 years old and less. Especially the percentage of patients aged 3 and less was the highest and that of schoolage and more was gradually reduced. The average number of siblings was 195 and the percentage of the first child in a family was the highest. Particularly, there were more boys in rase of one child families and more girls in case of families with 3 children and more. The chief problems were mainly language-deficit, hyperactivity, autistic behaviour, tic, aggressive behavior and academic problem. The higher frequency of diagnoses was in the order of parent-child problem, mental retardation, developmental language disorder, reactive attachment disorder, other emotional disorder, and pervasive developmental disorder. The more frequently used method fir treatments was in the sequence of psychotherapy, play therapy, parental counseling, occupational therapy and speech therapy. The results from this study were compared with those from other studies and discussed.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.22 no.3
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• pp.162-168
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• 2011

Objectives: Alcohol problems of parents have an influence on not only their psychological problems but also on their children's psychosocial adaptation. The purpose of this study was to compare the emotional and behavioral problems, including school bullying and social skills, between children of alcoholics (COAs) and children of non-alcoholics (non-COAs). Methods: We recruited $4^{th}$ grade children (n=741) from 7 primary schools in Seoul and their parents as subjects. The self-rated psychiatric symptoms were assessed with the Korean version of the Children of Alcoholics Screening Test (CAST-K), the Children's Depression Inventory (CDI), the Rosenberg's Self-esteem Scale (RSES), the School Bullying Scale, the Social Skill Rating Scale and the Korean version of Alcohol Expectancy Questionnaire-Adolescent (AEQ-A). The Attention-deficit Hyperactivity Disorder Rating Scale-IV (ARS) was completed by the parents. Results: 518 children were non-COAs and 223 were COAs. The COAs showed higher CDI and ARS-IV scores and lower RSES scores than the non-COAs. Especially, the COAs also showed higher school bullying scale scores and lower cooperative scale scores on the social skill rating scales. But there was no difference of alcohol expectancy between the COAs and non-COAs. Conclusion: It was plausible that the COAs had more behavioral & psychosocial problems than the non-COAs among the school aged children. It is important to identify and intervene to solve the problems of peer relationships of school age COAs in order to prevent victimization by bullying and to improve psychosocial adaptation.

• Korean Journal of Community Nutrition
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• v.25 no.3
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• pp.189-203
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• 2020

Objectives: This study was performed to identify the current barriers of obesity management for children using Community Child Care Centers and their caregivers (parents and teachers working in the Centers). Further, this study explored the possibility of utilizing a mobile phone application for tailored obesity prevention and management programs to overcome the current difficulties associated with children's obesity management. Methods: The qualitative data were collected through in-depth interviews with 20 obese and overweight children or children who wanted to participate in this study using Community Child Care Centers, 12 teachers working at the Centers, and a focus group interview with five parents of children using the Centers. Data were analyzed with a thematic approach categorizing themes and sub-themes based on the transcripts. Results: The current barriers of obesity management of obese and overweight children using Community Child Care Centers were lack of self-directed motivation regarding obesity management (chronic obesity-induced lifestyles and reduced self-confidence due to stigma) and lack of support from households and Community Child Care Centers (latchkey child, inconsistency in dietary guidance between the Center and household, repetitive pressure to eat, and absence of regular nutrition education). Mobile phone applications may have potential to overcome the current barriers by providing handy and interesting obesity management based on visual media (real-time tracking of lifestyles using behavior records and social support using gamification), environmental support (supplementation of parental care and network-based education between the Community Child Care Center and household), and individualized intervention (encouragement of tailored and gradual changes in eating habits and tailored goal setting). It is predicted that the real-time mobile phone program will provide information for improving nutritional knowledge and behavioral skills as well as lead to sustainable children's coping strategies regarding obesity management. In addition, it is expected that environmental factors may be improved by network-based education between the Community Child Care Centers and households using the characteristics of mobile phones, which are free from space and time constraints. Conclusions: The tailored education program for children using Community Child Care Centers based on mobile phones may prevent and reduce childhood obesity by overcoming the current barriers of obesity management for children, providing environmental and individualized support to promote healthy lifestyles and quality of life in the future.

• Research in Community and Public Health Nursing
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• v.10 no.1
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• pp.239-251
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• 1999

The purpose of this survey is to measure the sexual knowledge, attitude, and experience in college students in order to provide better sex education programs and direction. For this study, questionnaires were given to 259 students in K college of Kyongnam and collected during the period of June 1 to June 20, 1998. Data was analyzed using a statistical computer package: SPSS to manipulate the data along with frequency, mean, t-test, F-test and Pearson correlation coeffiency. The results from this study were summarized as follows: 1. Sex related knowledge marked 12.01 at a maximum level of 25. In the areas of Sex physiology(51.8%), genital physiology(49.9%), venereal diseases(44.3%) and contraceptive methods (38.1%), students were shown to have certain levels of knowledge. 2. Sex related attitudes marked 15.35 at a maximum level of 35. The most frank attitudes concerned 'premartial coitus in males' and the most conservative attitudes concerned 'extramarital coitus in females'. 3. Concerning sexual behavior 80.7% of the respondents had associated with the opposite sex. The most frequent behaviors were walking arm in arm (male : 28.6%, female: 36.2%). Their main problems were relationships with the opposite sex(male : 39.2%, female: 24.5%), frustrated sexual desire(male : 26.0%, female: 9.8%) and unwanted pregnacy(male: 15.2%, female: 7.8%) To solve sex problems, respondents intended to consult their friends(male : 35.7%, female: 46. 7%) and become active in sports or recreation (male: 23.4%, female: 11.4%). About 81.2% of male students had a masturbation experience, but only 11.4% of female did, 40.0% of male students had a sexual intercourse experience, but only 13.3% of females did, 7.8% of male students used contraceptive methods, but only 2.9% of females did. 12.3% of male students had a rape experience, but only 10.5% of females did. The proportion of male students who made someone pregnant was 12.3%,however pregnant female were only 6.8% and the proportion of male students who forced someone to have an abortion was 12.3%, females who experienced an abortion were only 5.7%. 4. Regarding genital physiology, there was a statistically significant differences in gender ( t = -7.342, p=0.000). Regarding contraceptive methods, there was a statistically significant difference in the father's education level(F= 2.421, p=0.036) 5. In sexual attitudes, there were statistically significant differences in gender( t = 4.456, p = 0.000), religion(F=4.315, p=0.000), high school(F=3.150, p=0.045), habitation form(F= 3.164, p=0.0025 and methods of acquiring sexual knowledge(F=2.990, p=0.012). 6. The variables regarding sexual experience were gender, high school, economic status, habitation form, method of acquiring sexual knowledge, and parental attitudes toward sex. From the result of the study, sex education is required and must be taught as a regular course in the curriculum of all Korean schools at all levels.

• Korean Journal of Health Education and Promotion
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• v.4 no.2
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• pp.71-94
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• 1987

Aiming to investigate nutrient intake and food habits influenced by smoking for female college students in Seoul, the questionnaire survey for 763 students was carried out. The results of the survey was summarized as follows: 1. 9.7% of students were found as the current smokers and 18.9% of students had experienced of smoking, however stopped smoking at present(experienced smokers) respectively. 2. In the current smokers, they started smoking with friends at the first (58.9%), alone (27.4%), and with seniors (11.0%) respectively. The psychological frustration (52.2%), curiosity (28.4%) respectively motivated smoking behavior at the beginning. The most had smoking usually at the entertaining place such as restaurant. Only 6.4% of current smokers consumed more than 10 cigarettes daily, and 55% of current smokers inhaled deeply into the lung while they smoked. Even 26% of current smokers explained their intention of not smoking after marriage, and also about 95% of current smokers explained to stop smoking in the case of pregnancy. 3. It was found as the fact that the school age, economic status, and parental smoking affected their prevalence of cigarette smoking. The higher their schoolage, the higher smoking showed; the more their money spent and the lower father smoking showed ; the more their money spent and the lower father's educational level, the higher smoking showed; the more drink, the higher smoking showed. 4. The value evaluation of cigarette smoking also affected the prevalence of cigarette smoking. Of the students recognized advantageous parts of smoking, the prevalence of cigarette smoking was higher. 5. Logistic regression analysis was to determine the most effective factor which determined prevalence of cigarette smoking. The most effective factor was value evaluation of cigarette smoking. The order of effective factors was health value of cigarette smoking, their drinking capacity and the value evaluation of change in body weight due to smoking and smoking's advantages. 6. Cigarette smoking showed signs of affecting to food habits. In the case of smoking, the missing rate of taking regular meals was higher, and the frequency rate of taking regular meals was lower. Also, smokers took meals less regularly. Even the smokers took less candy than non-smokers, however, smokers liked to take more coffee, alcohol, and hot tasting food than non-smokers. 7. Smoking seemed to affect the nutritional status. It was found that smokers took many kinds of nutrients insufficiently, therefore their calory intake by age was not reached to RDA.

• Journal of Korean Society of Forest Science
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• v.45 no.1
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• pp.51-61
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• 1979

The chromosome behavior and it's synapsis in the meiosis of pollen mother cell were studied on Populus alba L. as a female parent tree, Populus glandulosa Uyeki as a male parent tree and their hybrid, Populus alba x glandulosa. 1. At metaphase I, the number of nuclear plates with early separation chromosome were observed with the lowest proportion of 11.0% in Populus glandulosa and with the highest proportion of 13.0% in Populus alba${\times}$glandulosa. 2. At metaphase II, early separation chromosomes appeared with the frequency of 11.0% in Populus alba${\times}$glandulosa. But the frequency was not different with those of the parental trees. 3. At anaphase I, lagging chromosomes appeared with some high rate of 11.6% in Populus alba${\times}$glandulosa and yet the number of chromosome bridges in populus alba x glandulosa almost were not different with the partental trees. 4. At anaphase II, lagging chromosomes appeared with some high frequency of 10.2% in Populus alba${\times}$glandulosa and the chromosome bridges in Populus glandulosa appeared with the highest frequency in all studied trees. 5. The frequency of abnormal pollen sporad was the highest value of 8.2% in Populus alba${\times}$glandulosa among the studied trees. With the results, it might be assured that the chromosome segregation and it's synapsis behaved normally in Populus alba, Populus glandulosa and Populus alba x glandulosa, and so all the studied trees could produced normal pollens.

• Journal of Preventive Medicine and Public Health
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• v.39 no.3
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• pp.235-242
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• 2006

Objectives: We wanted to determine the distribution of the clustering of the metabolic risk factors and we wanted to evaluate the related factors in young schoolchildren. Methods: A cross-sectional study of metabolic syndrome was conducted in an elementary school in Seoul, Korea. We evaluated fasting glucose, triglyceride, HDL cholesterol, blood pressures and the body mass index, and we used parent-reported questionnaires to assess the potential risk factors in 261 children (136 boys, 125 girls). We defined the metabolic risk factors as obesity or at risk for obesity ($\geqq$ 85th percentile for age and gender), a systolic or diastolic blood pressure at $\geqq90th$ percentile for age and gender, fasting glucose at $\geqq110mg/dl$, triglyceride at $\geqq110mg/dl$ and HDL cholesterol at $\leqq40mg/dl$. Results: There were 15.7% of the subjects who showed clustering of two or more metabolic risk factors, 2.3% of the subjects who showed clustering for three or more risk factors, and 0.8% of the subjects who showed clustering for four or more risk factors. A multivariate analysis revealed that a father smoking more than 20 cigarettes per day, a mother with a body mass index of = $25kg/m^2$, and the child eating precooked or frozen food more than once per day were associated with clustering of two or more components, with the odds ratios of 3.61 (95% CI=1.24-10.48), 5.50 (95% CI=1.39-21.73) and 8.04 (95% CI=1.67-38.81), respectively. Conclusions: This study shows that clustering of the metabolic risk factors is present in young schoolchildren in Korea, with the clustering being associated with parental smoking and obesity as well as the child's eating behavior. These results suggest that evaluation of metabolic risk factors and intervention for lifestyle factors may be needed in both young Korean children and their parents.

• Korean Journal of Psychosomatic Medicine
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• v.2 no.1
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• pp.69-79
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• 1994

The authors investigated the relationship between the response to the external stimulation and ability of verbal behavior in the patients with somatoform disorder who have pain. The subjects consisted of 34 patients(male 10, female 24) and 37 normal controls(male 19, female 18). Pressure pain thesholds were measured by algometer and alexithymia was assessed by Toronto Alexithymia Scale(TAS). Somatization Scale of SCL-90R and Parental Bonding Instrument were also used. It was shown that 82.4% of the patients had chronic somatic complaints. The mean values of TAS, degree of somatic symptoms and pressure pain thresholds were significantly higher in the patient group than in the normal controls. 44.1% of the patients was considered alexithymia group and there was no correlation between scores of alexithymia and value of pressure pain thresholds. In conclusion, the patients with somatoform disorder who had pain were dull in pain perception to external physical stimulation. This result suggested that their low perception of pain could be closely related with chronicity of illness. And the Poverty of verbal expression of inner emotion was suggested to be one of the factors affecting somatization and difficulty in psychotherapy.

• Nutrition Research and Practice
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• v.10 no.4
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• pp.448-455
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• 2016

BACKGROUND/OBJECTIVES: A growing body of research has indicated that night eating could be associated with poor diet quality and negative health outcomes. This study examined the nutritional aspects of night eating, its related factors, and the association between night eating and body weight among Korean adolescents. SUBJECTS/METHODS: This study analysed the data from a one day 24-hour dietary recall as well as a demographic survey of 1,738 Korean adolescents aged 12 to 18-years-old obtained from the 2010-2012 Korea National Health and Nutrition Examination Survey. 'Night eating' was defined as consuming 25% or more of one's daily energy intake between 21:00 and 06:00. Subjects complying with the preceding condition were classified as 'night eaters', whereas the rest were considered 'non-night eaters'. Logistic regression analysis examined factors related to night eating. Multiple linear regression analyses were used to examine the relationship between night eating and BMI z-scores, whereas multinomial logistic regression analysis was used to examine the relationship between night eating and weight status. RESULTS: About 21% of Korean adolescents appeared to be night eaters. Night eaters showed increased breakfast skipping (P = 0.001), higher energy intake from snacks (P < 0.001), greater proportion of energy intake from fat (P = 0.029), and lower Dietary Diversity Scores (P = 0.008) than non-night eaters. Male adolescents presented 1.9 times higher odds of being night eaters than females. Adolescents whose both parents were night eaters were 4.4 times as likely to be night eaters as those whose neither parents were. Female adolescents showed a significant relationship between night eating and BMI z-scores (${\beta}=0.28$, P = 0.004). However, night eating did not increase odds of being overweight or obese in adolescents. CONCLUSIONS: Night eating in Korean adolescents was related to undesirable dietary behaviours and low diet quality in general as well as higher BMI z-scores in females. Male gender and parental night eating appeared to be the factors that significantly increased odds of night eating. These results suggest that night eating should be considered when designing nutrition education or intervention programs targeting adolescents.