This study aims at identifying the correlation between physique factors and physical fitness test items of primary school student, and supplying a basic data for setting up of scientific examination criteria of individual evaluation through the result ana

이 연구의 목적은 메타전략 활동이 중학교 1학년 학생들의 변인통제 능력 향상에 효과가 있는지를 조사하는 것이었다. 이를 위해 대구광역시내 1개 중학교 1학년 3학급을 각각 메타전략 활동집단, 문제풀이 활동집단 및 통제집단으로 선정하였다. 처치활동으로 메타전략 활동집단에게는 매회 15분씩 총 4회에 걸쳐 어느 한 특정 상황에서 변인통제전략에 대한 컨트롤, 모니터 및 평가 등의 활동이 요구되는 자료를 투입하였다. 문제풀이 활동집단에게는 메타전략 활동집단과 같은 방법으로 활동자료를 투입하였으나 그 내용은 다양한 상황하에서 여러 가지 변인통제 문제들을 해결하는 활동으로 구성되었다. 이 연구의 결과는 다음과 같다. 첫째, 메타전략 활동집단은 문제풀이 활동집단 및 통제집단보다 변인통제 능력 향상에 효과적이며(p〈.05) , 그 효과는 지속적이었다(p〈.01). 문제풀이 활동집단의 경우, 통제집단보다 효과는 있었으나(p〈.05) 지속 효과는 없었다. 둘째, 변인통제 능력의 요소별 발달 정도를 집단간 비교 분석 결과, 메타전략 활동집단이 문제풀이 활동집단보다 고정변인 찾기 능력에서 통계적으로 유의미한 차이를 보인 반면(p〈.01), 독립변인 찾기 능력에서는 통계적으로 유의미한 차이가 없었으며, 종속변인 찾기 능력 발달로의 전이의 효과는 없었다. 따라서 이상의 연구 결과를 종합해 볼 때, 과학탐구능력 중의 변인통제 능력을 향상시키기 위해서는 다양한 문제를 해결하도록 하는 활동 못지 않게 한 문제에 대해 깊이 생각해보는 메타전략 활동이 효과가 있음을 알 수 있었다.

본 연구는 사람의 시험관아기 프로그램에서 수정 후 1일째의 전핵 등급이 체외 수정란의 발달에 미치는 영향을 조사하였다. 정상적인 시험관 아기 시술을 시행한 실례 환자를 대상으로 과배란을 유기하여 배란 직전의 난자를 채취하여 정자를 주입한 다음 체외 수정을 유도하였다. 수정 유도 18시간 후 전핵과 핵인의 형태에 따라 전핵의 등급을 1 및 2등급으로 나누어 각각 3일 동안 체외 배양을 실시하여, 체외 수정란의 형태에 따라 1, 2 및 3등급으로 분류하였든

본 연구는 사람의 시험관아기 프로그램에서 체외 수정란의 질을 향상시키는 한 방법으로 난포액으로 처리된 정자를 체외 수정에 사용하여 생산된 체외 수정란의 전핵 등급과 발달 능력을 조사하였다. 정상적인 시험관 아기 시술을 시행한 실례 환자를 대상으로 과배란을 유기하여 배란 직전의 난자를 채취하여, 난포액으로 처리된 정자와 체외 수정시킨 후 사람 체외 수정란의 전핵 등급과 체외발달율을 조사하였다. 체외수정을 위한 정자의 처리 방법으로 synthetic ser

This study was undertaken to assess grade and gender differences in dietary behavior, food preference and perception about body image of students in 4, 5 and 6th grades in elementary school in Kwangju. Anthropometric data showed that mean height and weight were 137.98±6.79cm 32.69±6.09kg, in the 4th grade, 144.11±6.91cm, 36.88±7.60kg in the 5th grade and 151.52±7.47cm, 42.68±8.06kg in the 6th grade. Height and weight of male and female students of each grade were very similar to those of the Korean standard Growth data. Females in the 5th and 6th grades were taller than those in male students, which suggested the height growth spurt in females. Furthermore, both genders showed marked variability even in the same group. All the three different obesity indices(BMI, Rohrer and % of ideal body weight) showed higher value in males than in females consistently. Male respondents desired taller and heavier body shape while females perceived they were heavy and desired only taller and thinner body image. There were significant differences in satisfaction with height, weight and body image by grade(p〈0.05). 36.7% of subjects responded that they did not eat despite hunger. In higher grade they felt guilty after eating sweet things. Strikingly, it was noted a small number of students tried to take a diet pills or vomited on purpose. Data on food preference showed that female did not like sweet food and pork. While male students preferred red meat and chicken. Thus result indicated that there was a great difference in food preference by gender.

For the purpose of investigating the effect of sintering atmosphere and carbon addition on sintered density and microstructural characteristics, the M3/2 grade high speed steel powders with the addition of carbon are sintered in vacuum and gas atmosphere. With the addition of 0 wt%C, 0.45wt%C and 1.15 wt%C the optimum sintering temperatures decrease down to , and respectively for the vacuum sintered specimen, and also decrease down to , and for the gas sintered specimen. The threshold temperatures for full densification decrease steeply with increasing carbon content of the sintered specimen, while this temperatures are slowly decreased at high carbon content. The vacuum sintered specimen shows the primary carbides of MC and type at the optimum sintering temperature, and eutectic carbides of and Fe-Cr type are produced in the oversintered specimen. The gas sintered specimen exhibits M6C and Fe-Cr type primary carbides at the optimum sintering temperature. The eutectic carbides of and Fe-Cr type and MX type carbonitride are shown for the oversintered specimen in the gas atmosphere. The hardness of gas sintered specimen shows high value of 830-860 Hv due to the increment of carbide precipitation.

This survey was conducted to investigate the relation of children's obesity index to their mothers' food habit during the October in 1995. The survey covered a total of 492 mothers whose children were in the fifth grade of elementary schools in Cheju City area. The results are summarized as follows: 1.The surveyed children's average WLI(Weight-Length Index) is 107.08. WLI shows that 16.1% of them are overweight, 16.1% obese and 49.8% ideally weighted. The mothers' average BMI(Body Mass Index) is 22.4. 21.8% of them are underweight and 69.4% normal. The children's obesity index is significantly correlated to their fathers', but not significant to their mothers'. 2.As to the food habit I (balance of nutrients intake), 58.4% of the mothers have 'excellent' or 'good' food habit and the mean score is 14.95 out of maximum possible score 24.0. Concerning to the food habit II (intake of sugar, fat and salt etc.), 87.4% of mothers have 'good' or 'fair' food habit and the mean score of is 13.34 out of maximum (possible score) 20.0. The mothers' food habit I and II, as a whole, have no significant effect on the children's obesity index, but in some items the significant relations are founded. The children's chesty index is significantly related to the intake of eggs (P<0.05) and pan-broiled or fried foods (P<0.05). The amount of mothers' food intake is significantly relevant to their obesity index (P<0.001), but not significantly to their children's. The food habit of mothers who have taken midnight snack almost every day are significantly related to their children's chesty index (P<0.05). The findings of the study emphasize the importance of the nutrition education to ensure health and better physical fitness for children and their mothers.

An investigation was performed to apply the M3/2 grade high speed steel for metal injection molding using both prealloyed and elementally blended powders. The injected samples were subjected to a debinding step in gas atmosphere at a ratio that affected the carbon content of the material. The carbon content ranged from 1.4wt.% to 1.43wt%. with increasing content up to 80% in atmosphere for the prealloyed powders. The carbon contents of the elementally blended powders exhibited 1.44wt.% and 1.62wt.% at 10% and 20% gas, respectively. This level decreased to 0.17wt.% upon increasing the content. The sintered density of both powders increased rapidly as the temperature reached the liquid phase forming temperature. After forming the liquid phase, the density rapidly increased to the optimum sintering temperature for the prealloyed powders, whereas the density of mixed elemental powders goes up slowly to the optimum sintering temperature. The optimum sintering temperature and density are 126 and 97.3% for the prealloyed powders and 128 and 96.9% for the elementally blended powders, respectively. The microstructure of the specimen at the optimum sintering temperature consisted of fine grains with primary carbides of MC and type for the prealloyed powders. The elementally blended powders exhibited coarse grains with eutectic carbides of MC, and type.