As a result of analysis on situations of environment-friendly school meals, it was obtained that student"s parents were interested in food safety and the importance of sanitary supervision. Many parents responded that environment-friendly school meals increased the health and eating habits of their children. The higher and higher educated parents responded that environment-friendly school meals effected on the children’s health positively. Also, the higher educated parents responded that environment-friendly school meals effected on the children’s eating habits positively. After the environment-friendly school meals, the item increase to purchase was vegetables by 25% of the consumers who purchase environment-friendly agri-products. The second and third increasing items were respectively fruits and rice. When environment-friendly agri-products were consumpted and influenced positively through school meals, the consumption of environment-friendly agricultural products will be increased. The expansion of environment-friendly school lunch program cannot bring the consumption expansion of environment-friendly agri-products immediately. However, when the persistent promotion and student"s parents confidence on environment-friendly agri-products were accumulated and experienced positive effects through school meals, it will give a positive effect on the consumption of environment-friendly agr-products.
This study was conducted to determine the contents of heavy metal in commercial herbal medicines. The monitoring of lead, arsenic, cadmium and mercury was carried out on 100 samples with 10 kinds of herbal medicines. The contents of heavy metal were measured by inductively coupled plasma atomic emission spectrometry (ICP-AES) and mercury analyzer. The mean values of heavy metal contents for herbal medicines were Pb 1.87 mg/kg, As 0.39 mg/kg, Cd 0.26 mg/kg and Hg 0.021 mg/kg. Of the total samples, 19 samples (19%, 4 types) were violated the KFDA regulatory guidance of heavy metal in herbal medicines (9 samples on Pb, 10 samples on Cd). Among these 19 unsuitable samples, 16 samples were domestic and 3 samples were imported. Therefore, we need continuously monitoring to ensure confidence and safety for these herbal medicines.
This paper analyzed the CO2 emission of existing buildings with reconstruction and reusing in declined commercial area of Jeonju old town. The average CO2 emission to square meter of commercial buildings in Junju is 1.4tCO2/m2.
This study is to evaluate performance of two-way acting insulated sandwich wall panels through flexural experiment. The two-way acting panel resists wind loading on the panel and on the window. In this study, GFRP(Glass Fiber-Reinforced Polymer) Grid-type shear connectors are used for the composite action of the sandwich wall panels. Layouts of shear connector are considered as main parameter of this experimental study.
In this study, a newly developed reinforced concrete (RC) composite column strengthened by high performance fiber reinforced composite (HPFC) was analyzed by using a nonlinear flexural analysis of columns. The analysis by the developed model was well predicted the experimental performances of HPFC and RC composite columns.
The seokbinggo structure has the load characteristics supporting the vertical load and lateral pressure. Also, the load transfer mechanism and stress concentration should be considered through the design variable analysis according to construction types of seokbinggo. To this end, this study performs the structural behavior evaluation of seokbinggo according to arched stone space.
This study is to evaluate fatigue resisting capacity of insulated sandwich wall panel under wind-induced fatigue loading. The fatigue loading is calculated based on the probability distribution function (Weilbull and Rayleigh). The serviceability of the insulated sandwich panel was evaluated subjected to the probability-based fatigue loading.
Concrete is generally accepted to have good fire resistance. It mainly relies on the assumption that concrete has low heat-transfer characteristic and spalling does not occur during the course of a fire. However, the significant numbers of fire accidents have shown in recent years that incidence of spalling has caused sever damages to many structures. This research has investigated a series of catastrophic tunnel fires and tested on the behaviour properties of concrete in association with loading in fire. This paper present that the theoretical consideration and experimental results are used the information of concrete spalling.
This study presents bond performance of insulated concrete sandwich panel systems considering different type of insulation through two-way acting insulated concret sandwich panel mock-up test under wind pressure.
본 연구는 유역의 침수특성치를 기준으로 하여 치수계획규모를 설정하는 방법을 연구한 것이다. 본 연구에서는 2010년 9월 21일 광화문일대에 발생한 침수피해를 이용하여 XP-SWMM 2010 모형을 검증한 후 침수예상도를 산정하였다. 확률강우량은 Huff의 4분위법으로 분포시켰으며, 기존의 유역출구점을 기준으로 한 임계지속시간의 문제점을 제시하였으며 침수특성치(관로첨두유출량, 평균침수심, 특정지점의 최대침수심, 침수면적, 침수총량, 침수지속시간)를 기준으로 유역치수계획규모를 설정하는 방법을 제시하였다. 현재 유역의 치수계획규모 설정시 사용되고 있는 관로첨두유출량은 도시유역의 침수특성을 합리적으로 반영하지 못하는 것으로 판단되었으며 도시유역에서 발생하는 침수의 결과치인 침수특성이 치수계획규모 설정에 합리적인 것으로 나타났다. 유역의 치수계획규모는 각 유역의 지리·물리·사회·경제적 특성에 기반한 침수특성치를 선택하여 그 유역이 감당할 수 있는 침수특성치를 제외한 나머지의 침수특성치를 극복할 수 있도록 설정해야할 것이다.