Sung-Hyun Park

Space debris that re-enter the Earth's atmosphere can be partially or fully ablated along the trajectory path after hitting the atmosphere layers, once these become denser (approximately below 82 km). This paper combines re-entry survival analysis to by-product generation analyses according to specific trajectory analysis and different levels of modelling within the re-entry simulation tool. Particular attention is made on metallic alloy decomposition and metallic oxides formation from the debri

Silla that had been dependent on Kogury started to fight against it in the mid 5th century. It has been thought that the hostile relationship between them was not repaired and that the border had been the Sobaek mountains until the mid 6th century when Silla advanved into the Han River basin. However, it can be assumed that there was a peace treaty between them because there was no combat in the 1st half of the 6th century. The Koguryo Monument in Jungwon can be read as a memorial of the peace t

The concern caused by the rising population of space debris has increased. One of the recommended mitigation measures is the safe re-entry disposal either in a controlled or uncontrolled manner. Performing a controlled re-entry, where the spacecraft is guided down to impact in a designated zone such as the ocean or a non-populated area, complies with the mitigation standards. However, it has limitations in terms of the cost of developing and ensuring reliability of a system. Therefore, an uncont

It is very important to produce military goods for customers, and a customer satisfaction index should be developed for quality control of military goods. Seoul National University and Defense Quality Assurance Agency jointly developed MCSI (Military Customer Satisfaction Index). In this paper the model of MCSI is explained, and the sampling design and survey method is introduced. Also a preliminary test was undertaken, and its result is briefly explained.

In this paper, we will introduce the predominant case on the marine leisure business of the overseas. Next we will analyze the current situation of the domestic marine leisure and draw up a plan to solve its problem. At first, we will introduce the predominant case on the marine leisure business of the overseas. Next we will analyze the current situation of the domestic marine leisure and draw up a plan to solve its problem. Finally we apply an environment friendly marina establishment to the ar

통계품질(statics quality)은 통계가 얼마나 사용자들이 이용하기에 적합한가를 나타내는 특성으로, 최근 선진국 및 국제기관들을 중심으로 높은 관심을 보이고 있다. 본 논문에서는, 통계품질관리의 개념, 통계품질의 척도, 통계품질관리의 8단계(조사기획, 표본설계, 조사표 설계, 조사원 훈련 및 자료수집, 조사결과 분석, 이용자 서비스, 사후관리 통계품질평가 및 관리)를 소개하고 표본조사통계를 위한 통계품질관리 가이드라인을 제시한다.