• 한국수학교육학회지시리즈C:초등수학교육
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• 제7권2호
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• pp.85-99
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• 2003

In this paper, firstly examined various proofs types that cover informal empirical justifications by Balacheff, Miyazaki, and Harel ＆ Sowder and Tall. Using these theoretical frameworks, justification activities by 5th graders were analyzed and several conclusions were drawn as follow: 1) Children in 5th grade could justify using various proofs types and method ranged from external proofs schemes by Harel & Sowder to thought experiment by Balacheff This implies that children in elementary school can justify various mathematical statements of ideas for themselves. To improve children's proving abilities, rich experience for justifying should be provided. 2) Activities that make conjectures from cases then justify should be given to students in order to develop a sense of necessity of formal proof. 3) Children have to understand the meaning and usage of mathematical symbol to advance to formal deductive proofs. 4) New theoretical framework is needed to be established to provide a framework for research on elementary school children's justification activities. Research on proof mainly focused on the type of proof in terms of reasoning and activities involved. But proof types are also influenced by the tasks given. In elementary school, tasks that require physical activities or examples are provided. To develop students'various proof types, tasks that require various justification methods should be provided. 5) Children's justification type were influenced not only by development level but also by the concept they had. 6) Justification activities provide useful situation that assess students'mathematical understanding. 7) Teachers understanding toward role of proof(verification, explanation, communication, discovery, systematization) should be the starting point of proof activities.

• Journal of Nutrition and Health
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• 제6권2호
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• pp.25-33
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• 1973

With the object of the study id every possible correlation between daily food intake and growth rate of primary school students, aged eleven years old, the author distributed prepared questionnaires through 200 children of 5th grade in both sexes in K private primary school, Seoul. Specific object of this study were included following three points: such as daily food intake records for six days. daily food intake records for six days. school records of sample children at the end of 4th grade. physical growth index calculated by means of weight and height of sample children at the first part of the 5th grade. CR. t. F. test as well as percentage calculations were included for statistical analysis. The result of this study were as follows: 1. For the living circumstances a) Average numbers of brother and sister in sampled family were two to three. b) Approximately 50%of the children were brought up by mother's milk at their infants and about 35% of children were weaned at the age of 7 to 12 months. c) Thirty to forty percent of the respondents revealed irregulity in their meal time due to early school time in the morning. d) Monthly average expenditure for daily food reached 20 to 29% out of total income. e) The most favorit foods reflect as follows: The most favorit main dish is boiled rice mixed with other careals and side dish beaf. Fruits and juice are more popular snack among whole children. 2. Nutrition survey a) The calcium and thiamine were the most limited factors out of daily nutrients consumption. b) The total calory intake were composed of carbohydrate 63%, protein 16% and fat 21% respectively. c) The total food intake were composed of 20 to 24% of animal source of foods and 76 to 80% of plant source of foods (vegetables, grains, fruits) d) The total protein intake were composed of 46% of animal protein and 54% of others. e) The grain stuffs consumed in the largest quantity at the level of 50% out whole food groups. f) Twenty four percent of total food intake came from snack between meal time. 3. The result of statistical analysis were as follows: a) The correlation between the calory intake and plysical growth index revealed statistical significancy at the level of p<0.001. b) The correlation between the protein intake and physical growth index revealed statistical significancy at the level of p<0.001. c) The correlation between the meal time and physical growth index revealed statistical significancy at the level of 0.02

• 한국학교보건학회지
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• 제3권2호
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• pp.21-30
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• 1990

• 한국학교보건학회지
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• 제3권1호
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• pp.73-82
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• 1990

Sex does not mean simply the physical behaviors related to man and woman, rather the sexuality needed socializing process toward total personality. It is believed that religion or social norms on sex, limit talking about sex openly. But children have, their own sexual thinking and want to know why and how. This survey was conducted to find out the need in sex education of primary school students and their parents in Seoul area, comparing students'sexual knowledge, attitude, and behavior to their parents', in October 1989. Total 400 students and their parents who are attending two primary school in Seoul, were given the questionnaires, and 395 students' and 310 parents', respectively, were finally analyzed. The following results were obtained. 1. The mean of 11 questions In asking sexual knowledge of students was 6.18, and showed no difference between boys and girls. But the higher grade, the higher score. 2. The positive attitudes on marriage and sex roles were showed, but negative on physical changes with puberty, which was same to the parents' reaction. 3. Moro than three-forths of students wanted to take sex education class, and one-third of them believed that it should be conducted by school nurses. This was accorded with their parents. 4. The sexual knowledge degree and attitudes of parents went proportionately to their higher educational background. Protestants reacted more negatively to the given sexual terms. No significant difference was made among the age groups of them. As stated above. the degree of sexual knowledge and attitudes are movable accordingly to their children's sexual thinking and need. Therefore, it is strongly recommended that sex education In the primary schools should be conducted systematically involving parents, especially mothers. And it is suggested that school nurses undertake their responsibilities as the sex educators.

• Parasites, Hosts and Diseases
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• 제26권3호
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• pp.215-220
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• 1988

국내 일부 지역 국민학교 학동에 있어서 요충 감염상태를 알아보고자 하였다. 즉, 1984년 10월 서을 지역의 한 국민학교와 경기도 양주군의 한 국민학교, 1986년 10월 경기도 의정부의 한 국민학교에 대하여 항문주위 도말검사를 오전 9시∼12시 사이에 1회 실시하였다. 한편 1988년 10월 상기 국민학교 3학년 학동들에게 요충감염에 영향을 미칠 것으로 생각되는 가정환경 요인들에 대하여 설문 조사를 시행하였다. 국민학교 학동의 요충란 양성률은 평균 16.0%(2,156명 조사)였고 남자가 14.5%(1,118명), 여자 가 17.6%(1,038명)로서 여자에서 약간 높았다. 또 저학년보다 고학년에서 낮은 양성률을 보였다. 지역별로는 서울의 유현국민학교 학동이 13.6%로 가장 낮은 양성률을 보였고 경기도의 호암국민학교가 17.5%, 덕산국민학교가 17.6%의 양성률을 각각 보였다. 학동의 요충 감염에 영향을 미칠 것으로 생각되는 여러 가정환경 요인들중 가장의 직업, 형제수, 어린이 방의 유무, 목욕실 유무 등이 유의한 요인으로(p<0.1) 나타났다. 이상의 결과는 학동의 요충 감염이 아직도 높은 상황임을 보이고 있으나, 과거 10연전의 성적과 비교해 볼 때 감소되고 있으며, 특히 생활수준과 가정환경 요인의 개선이 감염률의 감소에 영향을 미치고 있음을 알 수 있었다.

• 대한간호학회지
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• 제44권2호
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• pp.119-128
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• 2014

Purpose: This study is an examination of the paths in which the primary factors of anxiety, impulsiveness, knowledge of life safety practice, attitudes towards life safety practice, interpersonal support, and self-efficacy from Pender's Health Promotion Model influence the practice of life safety behavior in school-age children. Methods: The sample consisted of 489 5th and 6th grade students recruited from five elementary schools in Seoul City and four provinces, South Korea. Data were analyzed using descriptive statistics, correlations, factor analysis, and structural equation modeling. Results: Attitudes towards life safety practice, interpersonal support, self-efficacy and impulsiveness directly influenced practice of life safety behavior. Anxiety did not have a direct influence on practice of life safety behavior, but indirectly affected it. In this modified model, 52.0% of the practice of life safety behavior was explained by the primary factors. Conclusion: To facilitate the practice life safety behaviors in late childhood, a positive attitude towards life safety needs to be developed along with decreasing impulsiveness and enhancing self-efficacy.

• International Journal of Computer Science & Network Security
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• 제24권8호
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• pp.184-190
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• 2024

The research involved children and parents of primary school-aged children with cognitive development disorder, as well as scientific and pedagogical workers who organized the psychological and pedagogical principles for organizing distance learning. The purpose of the research lies in establishing how effectively children, parents and their teachers cope with online distance learning during the pandemic, as well as investigating the extent to which such educational technology affects the emotional and behavioural state of the child. The research methodology is based on complexity. In the course of the research, the method of pedagogical experiment was used; observation and questionnaire methods were also introduced; the descriptive method, analysis and synthesis were used to review the theoretical material. The hypothesis lies in the fact that distance online education increases academic difficulties, changes the behavioural and emotional picture of a child with cognitive development disorder; consequently, the behaviour and emotional background will be limited by certain parameters, and this requires the active involvement of parents and teachers in the distance work process. The results of the research have revealed that distance education causes a number of restrictions for children with cognitive development disorder, namely: concentration of attention has decreased, anxiety has increased, and sleep has worsened. Behavioural changes predicted increased restlessness and aggression. Parents and teachers have had methodological, academic and everyday difficulties; all participants in the educational process have been more limited in the conditions of online distance learning. difficulties and improving the behaviour and emotional states of all participants in the educational process.

• 한국환경보건학회지
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• 제32권5호
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• pp.506-514
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• 2006

The objectives of this study were to evaluate personal exposure estimated using a time activity pattern and microenvironmental model. The study was carried out for 44 children attending a primary school nearby the lines (school A) and 125 children attending a school away from 154 kV power lines (school B). For children attending school A, the estimated personal level was a little weak correlated with the measured level($Pearson\;r\;=0.34{\sim}0.35$). For children attending school B, the correlation was very low ($Pearson\;r\;=\;0.09{\sim}0.16$) using the TW A Model II, otherwise, TWA Model II-I which considered the average residential MF level according to the distance from the power line and home explained $39{\sim}53%$ of the correlation in MF personal exposures. The estimated personal exposure level was very well represented by the measured exposure level using TWA Model II-2 which consisted on spot and 24 h stationary measurements at subject's home ($Pearson\;r\;=\;0.65{\sim}0.85$). In conclusion, personal magnetic field expsoure estimated using a TWA Model II-2 should be provided for a reasonable estimate of measured exposure in schoolchildren living near the power line.

• Journal of Preventive Medicine and Public Health
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• 제14권1호
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• pp.13-22
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• 1981

A study was conducted to provide comprehensive information on epidemiological state of crippled schoolchildren in Chungnam area from November 23,1979 to June 19,1980. In this study, two step survey was conducted upon whole primary, middle and high school, and subsequent selected 537 cases in total 3,063 crippled children. The results obstained are as follows; 1. The prevalence rate of orthopedic defect children was 3.7 per 1,000 and dominant male as 6:4. 2. It was relatively higher the school grade and prevalence rate more increased. Prevalence rate was highest in high school as 4.7 per 1,000, middle in middle school as 4.4 per 1,000 and lowest in primary school as 3.1 per 1,000. 3. The most predominant group was $15{\sim}19$ age as 52.9 percent. 4. The most common job of their parent was agriculture as 52.9 percent and next job sales and service. Economic state of Cripple's parent have revealed no particular difference. 5. In a family, the most common incidence rate was first children in both sex and decreased by ordered sibling. 6. Poliomyelitis was the most common cause as 71.5 percent and next cerebral palsy 11.9 percent. 7. The most common affected site was lower extremity (Right: 42.3%, Left: 35.5%) and next upper extremity. Right was more dominant as 55 : 45. 8. Intelligence was decresed in cerebral palsy predominantly than other cause of defect, including poliomyelitis. 9. For the treatment of their condition at onset of illness, crippled children was utilized private clinic and herb medicine, but was changed tendency of treatment as acupucture and moxibustion after diagnosis of cause of defect.

• Journal of Nutrition and Health
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• 제34권6호
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• pp.671-677
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• 2001

The purposes of this study are to evaluate nutritional status and dietary intake of vitamin A in 5th and 6th grade primary school children in Chungbuk. Also the relationships between nutritional status and factors relevant to dietary intake of vitamin A were examined. For the study, total 180 children in urban area of Chongju city(37 boys and 40 girls) and rural area of Eumsong gun(56 boys and 47 girls) were recruited. For the assessment of dietary nutrients intake including vitamin A, 1-day, 24-hr recall method was applied. And serum retinol contents were analyzed by HPLC to diagnose the nutritional status of vitamin A. The average of daily vitamin A intake was 490R.E., 81.8% of RDA. Vitamin A intake of urban was higher than that of rural children(p < 0.001). Of the total dietary vitamin A intake, only 25.8% came from animal retinol, means that children still heavily depend on plant carotenoids as vitamin A floods. The average serum retinol concentration of total 180 children was 37.2$\mu\textrm{g}$/100ml. Serum retinol concentration of urban children was 37.3$\mu\textrm{g}$/100m1, significantly higher than rural children of 35.6$\mu\textrm{g}$/100m1(p < 0.05). According to the biochemical criteria, no one was in critical vitamin A nutritional status. Because of relatively large day-to-day vitamin A intake, 1-day, 24-hr recall method may not be the proper way to assess the usual intake of vitamin A. In conclusion , to diagnose the nutritional status of vitamin A by dietary survey, it is necessary to develop new survey technique which measure the dietary habit of the people.