The topic of this study is the field of humanitarian logistics for disaster response. Many existing studies have revealed that compliance with the golden time in response to a disaster determines the success or failure of relief activities, and logistics costs account for 80% of the disaster response cost. Besides, the agility, responsiveness, and effectiveness of the humanitarian logistics system are emphasized in consideration of the disaster situation’s characteristics, such as the urgency of life-saving and rapid environmental changes. In other words, they emphasize the importance of logistics activities in disaster response, which includes the effective and efficient distribution of relief supplies. This study proposes a mathematical model for establishing a transport plan to distribute relief supplies in a disaster situation. To determine vehicles’ route and the amount of relief for cities suffering a disaster, it mainly considers the urgency, effectiveness (restoration rate), and uncertainty in the logistics system. The model is initially developed as a mixed-integer nonlinear programming (MINLP) model containing some nonlinear functions and transform into a Mixed-integer linear programming (MILP) model using a logarithmic transformation and piecewise linear approximation method. Furthermore, a minimax problem is suggested to search for breakpoints and slopes to define a piecewise linear function that minimizes the linear approximation error. A numerical experiment is performed to verify the MILP model, and linear approximation error is also analyzed in the experiment.

This study analyzed that the standard of school supplies affects the satisfaction of certification. Safety requirements of school supplies in the Republic of Korea is enforced by court duty certification. Therefore, a test was conducted to compare the safety requirements of the United States and Europe and the survey was conducted to know how much manufacturers and importers are satisfied with the certification. To prepare management measures for harmful substances contained in children's product, XRF(X-ray Fluorescence Spectrometry) is utilized to analyze lead(Pb) and cadmium(Cd) in PA(paint), SP(sheet) and PVC(Poly Vinyl Chloride). The results of comparative analysis of ICP(inductively coupled plasma) is analyzed statistically with measured values.

Transportation problem is an optimization problem. In general, it was studied under random or uncertain condition. Considering the recent complexity, it is not enough to make should be a perfect transportation plan only based on. Usually, there is not only uncertainty but also randomness in many systems. In this paper, the aim is to investigate a transportation problem under uncertain and random environment. As a result, a conceptual uncertain random model is proposed for the problem, where the supplies are considered as random variables, and the costs and the demands are uncertain variables. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, transforming the model into a crisp mathematical form is the main conclusion. By minimizing the expected value of uncertain objective function and taking confidence levels on constraints, the above model can be turned to a mathematical form. Then transforming the model into a typical mathematical programming model is the main conclusion by using uncertainty theory and probability theory. At the end, a numerical example is given to show the feasibility of the model.

◉ 목적 : 본 연구는 자기모델형 시각적 단서인 앨범을 활용하여 지적장애 아동의 학용품 구매훈련 효과를 알아보고자 하였다. ◉ 연구방법 : 본 연구는 지적장애로 진단받은 10세 여아 1명을 대상으로 단일대상연구(single-subject experimental research design) 중 ABA’ 설계를 사용하였다. 실험은 총 12회기로 기초선 과정(A1) 3회기, 자기모델형 시각적 단서를 활용한 중재 과정(B) 6회기, 재 기초선 과정(A2) 3회기로 진행하였다. 독립변수는 자신이 과제를 수행하는 사진으로 제작한 앨범을 이용한 자기모델형 시각적 단서를 사용하였으며, 종속변수로 학용품 구매 과제 완수율과 도움의 양을 측정하였다. 기초선 기간에는 중재 없이 학용품 구매 과제 완수율만 측정하였고, 중재 과정 6회기는 자기모델형 시각적 단서를 활용한 후, 과제 완수율과 도움의 양을 측정하였다. 재 기초선 3회기는 중재 없이 과제 완수율만을 측정하였다. ◉ 결과 : 학용품 구매 활동에 대한 과제 완수율은 기초선 과정에 비해 자기모델형 시각적 단서를 활용한 중재 기간 동안 50% 향상되었다. 또한 중재가 진행됨에 따라 도움의 양이 점차적으로 줄어들었으며, 재 기초선 과정을 통해 중재 종료 후에도 그 효과가 90% 지속되는 것을 확인할 수 있었다. ◉ 결론 : 자기모델형 시각적 단서는 지적장애 아동의 학용품 구매 활동 수준의 향상과 유지에 효과가 높은 것으로 나타났다. 그러므로 자기모델형 시각적 단서를 이용한 중재는 지적장애 아동의 독립적인 일상생활을 향상시 키는데 유용하게 사용될 수 있을 것으로 사료된다.

Algae-related taste and odor problems are recognized by the water community worldwide to be major causes of consumer complaints and a loss in confidence of drinking water safety by the general public. Such problems can be arisen by natural and anthropogenic means, even by drinking water treatment processes. Microorganism is a common cause of naturally produced taste and odor. In this connection, the role of microorganisms and their metabolites are reviewed in the viewpoint of taste and odor in drinking water supplies.

생활수준 향상과 식생활 변화로 인하여 생활용수 소비량이 증가함에 따라 일상생활에서 배출되는 오수의 양도 증가할 것으로 예측된다. 아파트 단지내 오수정화시설 및 하수처리장의 설계를 위해서는 먼저 인구에 근거한 오수량의 발생원단위를 알아야 한다. 이러한 자료는 하수처리의 운전이나 수질관리 계획 수립을 위해서도 꼭 필요한 것이다. 따라서 본 연구에서는 주택공사의 123개 관리소에 2년간의 급수량을 취합하여 거주인구에 따른 급수량을 분석하였고 그 중에 수도권