The purpose of this study was to examine the relationships of nutritional and social factors among 100 children aged 5~6 years. Forty five children (45%) were selected from families with low socioeconomic status, while 55 children (55%) were from those with high socioeconomic status. Cognitive performance of the children was measured by the Draw a man test and the degrees of hyperactivity were assessed by both children's mothers and their teachers using two different Check List (Behavior check list and Conner's rating scale). There were few associations between cognitive performance and nutritional variables. However, levels of hyperactivity were related positively to diversity of food intake and weight percentage for age, and negatively to animal and processed food preferences. These results indicate a possible role of nutrition on psychological development.

We evaluated the nutritional and socioeconomical factors of 100 children aged 5~6 years. Forty five children (45%) were selected from families with low socioeconomic status, while 55 children (55%) were from those with high socioeconomic status. Some differences of the nutritional factors (eating behavior, food preference, food frequency) were found between low and high socioeconomic groups. This survey suggest that eating behavior, food preference and food frequency may be useful in estimating nutritional factors. And the nutrition education for the children and their meal planners is necessary to improve the nutritional status of the subjects.

This study investigated the properties of lightweight foamed concrete by using surfactant and synthetic foaming agent, lightweight aggregate. The effects of foaming agent types and replacing ratio of lightweight aggregate on the compressive strength, density and pore structure of the concrete were investigated. This study showed the improvement of important properties of lightweight foamed concrete. Lower pore distribution and correspondingly higher compressive strength values were reached. Also, synthetic foaming agent had more positive effect on the strength of foamed concrete.

This study investigated the properties of foamed concrete by using surfactant foaming agent and synthetic foaming agent. The effects of foaming agent types on the compressive strength, density and pore structure of the concrete were investigated. The samples were assessed by XRD analysis and simultaneous SEM was used to study their pore distribution. This study showed the improvement of important properties of foamed concrete. Lower pore distribution and correspondingly higher compressive strength values were reached. Also, synthetic foaming agent had more positive effect on the strength of foamed concrete.

This study investigated the properties of foamed concrete by using surfactant foaming agent and synthetic foaming agent. The effects of foaming agent types on the compressive strength, density and pore structure of the concrete were investigated. The samples were assessed by XRD analysis and simultaneous SEM was used to study their pore distribution. This study showed the improvement of important properties of foamed concrete. Lower pore distribution and correspondingly higher compressive strength values were reached. Also, synthetic foaming agent had more positive effect on the strength of foamed concrete

This study investigated physcal properties of high performance concrete(HPC) using the garnet(GA) and Fly-ash(FA) under high temperature. After heating up the concrete, its appearance, failure mode, residual compressive strength, weight reduction ratio and other physical properties of concrete, it was mixed with nylon(Ny), polypropylene(PP), steel fiber(SF). The specimen was exposed to 100~800℃ and its crack control, spalling prevention and other physical characteristics were reviewed.

Recently, it is requests the reduction of self-load at structure and the cross section reduction due to the trend of making higher, larger of buildings. But The experiment of Lightweight concrete is mostly implemented in Laboratory and is rarely implemented in patch plant for application of construction site. therefore, this study will be useful at base, when the lightweight aggregate concrete is applied to construction site. so We had a comparative experiment of physical performance with in laboratory and Batch plant for lightweight aggregate concrete.

This research was performed to evaluate physical properties of polysulfide epoxy overlay material for bridge deck, as part of a review for possibility of domestic of epoxy polymer concrete binder for thin bridge deck pavements. After mix test, carry out experiment such as harden, viscosity, tensile, compressive strength and Ultraviolet ray test for evaluate strength and durability characteristics. The tests showed that the results, met the criteria suggested by the ACI in hardness, viscosity, tensile strength and compressive strength. Furthemore, a comparsion of the in this study and goods of Transpo.co in USA, this study were excellent.

연구 목적은 체육 수행평가의 중요성을 고려하면서 2×2 성취목표성향의 수준에 따라서 자기핸디캡의 차이가 나타나는지 그리고 성취목표 성향이 자기핸디캡에 어떠한 영향을 주는지 규명하는 것이다. 516명의 중학생들을 대상으로 2×2 성취목표성향 질문지, 자기핸디캡 질문지를 배포하고 수행평가 중요도를 평정하게 했으며 기술통계치, 공분산분석, 상관분석, 회귀분석을 실시했다. 연구결과 첫째, 숙달 접근은 높고 숙달회피 성향은 낮은 집단이 다른 집단보다 자기핸디캡이 낮게 나타났다. 둘째, 수행접근이 높고 수행회피가 낮은 집단과 수행접근과 수행회피가 모두 낮은 집단이 다른 집단보다 자기핸디캡이 낮게 나타났다. 마지막으로 숙달회피와 수행회피 성향은 자기핸디캡에 정적으로, 숙달접근 및 수행접근 성향은 자기핸디캡에 부적으로 영향을 미치는 것으로 나타났으며, 숙달회피 성향이 자기핸디캡에 대한 가장 큰 영향력을 가지는 것으로 나타났다. 연구결과를 토대로 논의를 제시했으며, 본 연구의 제한점을 토대로 후속연구에 대한 제언을 했다.

공학적 방벽 중 완충재의 물리적 성능향상을 고찰하기 위하여 국내산 옥산 벤토나이트 원광을 사용하여 건조밀도(1.6, 1.8g/cm3), 수분함량(5, 9.4, 15, 20 wt%), 모래함량(0, 10, 20, 30 wt%)을 변화시켜 제작한 벤토나이트 블록의 열전도도를 측정하였다. 이 중, 수분 함량의 변화에 의한 열전도도 증가 효과가 가장 켰으며 특히, 수분 함량이 15 wt% 이상일 경우 건조밀도와 모래함량의 변화와 상관없이 1.0 W/mK 이상의 값을 나타내었다. 따라서 국내의 옥산 벤토나이트 원광을 완충재의 원료로 사용할 경우, 벤토나이트 블록의 제작 용이성과 열전도 증가의 효율성을 고려하였을 때 건조밀도 1.6g/cm3, 모래함량 10~30 wt%, 함수량 15 wt%로 벤토나이트 블록을 제조하는 것이 가장 효율적인 것으로 제안될 수 있다.