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생산자 책임재활용 제도를 위한 혼입비율 조사에서 Judgement Post-Stratification의 활용
최완석,임요한,임종호,김현중,Choi, Wan-Suk,Lim, Jo-Han,Lim, Jong-Ho,Kim, Hyun-Joong 한국통계학회 2008 Communications for statistical applications and me Vol.15 No.1
환경부가 2003년 이후 생산자 책임 재활용 제도를 시행함에 있어 각 기업의 처리 대상 재활용 실적(양)을 측정하는 것이 중요한 문제가 되었다. 이때 각 기업의 처리 적의 중요한 변수가 비 대상품목의 혼입비율이고 이를 매년 기업 단위로 12회 이상 조사해 오고 있다. 하지만 혼입 비율을 조사함에 있어 조사자의 안전성, 악취, 정확한 비대상품 식별의 어려움 등등 여러 가지문제가 발생함에 따라 적은 조사 회수로도 정확한 혼입비율을 측정할 수 있는 방법에 대한 현장 조사자들의 요구가 있어 왔다. 이에 본 논문은 최근 통계학 분야에서 활발하게 연구되어 지고 있는 Judgement Post-stratification(이후 JPS)라는 특별한 표본조사 방법을 적용해 볼 것을 제안한다. 본 논문에서는 JPS 방법의 효율성을 모의실험을 통하여 현재 사용되고 있는 Simple Random Sampling (이후 SRS)방법과 비교, 표본수가 같은 경우 그 우수성을 이야기하였고, 이를 실제 2004년 환경자원공사에서 수행한 실제 조사 자료에 적용하여 JPS를 이용한 방법이 기존의 방법을 적은 조사회수로도 충분히 대체 할 수 있음을 보였다. Judgement post-stratification is a new sampling method developed by MacEachern et al. (2004). This article suggests that the judgement post-stratification method can be a good alternative for the simple random sampling when analyzing real-world environmental data. It becomes an important task to accurately measure the output of a recycling facility since the EPR (Extended Producer Responsibility) system takes effect on 2003. However, the total weight of materials processed in the recycling facility may not be a proper measure because the materials are frequently mingled with other non-recycling materials. Therefore, it is necessary to estimate the mixture ratio of non-recycling materials among the total materials admitted in the facility. Unfortunately, the size of sample in a recycling facility is restricted due to the inconvenience of sampling procedure such as safety, odor, time and classification of non-recycling materials. In this article, we showed the relative efficiency of the judgement post-stratification method over the simple random sampling method for equal sample sizes using Monte Carlo simulation. Furthermore, we applied the judgement post-stratification method on the 2004 recycling data and showed that it can replace the simple random sampling even with smaller observations.
崔浣錫 광주대학교 1990 論文集 Vol.7 No.-
We have found the following characteristics off pedestrian traffic accident, which are the most important task to seek the countermeasures for traffic safety in Korea. 1. The rates of pederstrian traffic accidents were much higher than those in advanced countries. 2. The accident rates of pre-school children below the age of 5 and of the adults above the age of 46 were very high. 3. The traffic accidents more frequently occurred at night than during the daytime. Therefore, the former accidents were more serious ones than the latter. 4. Most of pedestrian traffic accidents occurred near pedestrian crossing - zone or at the time of crossing the street. We should make the following countermeasures of the above characteristics of pedestrian traffic accidents : 1. We should offer various kinds of educations for drivers to improve some bad ideas of traffic customs and to make awareness of traffic regulations. The control over their traffic offences or violations of regulations should accordingly be continuously and repeatedly kept. 2. We should offer the pedestrians, i.e. both the children and the adults, various opportunities to get traffic safety education. 3. We should set up a large number of signs and markings of traffic at the appropriate places. They should also be luminous-painted for the night. Near the many-traffic-accident places, alarm signals are to be set up. The ultimate solutions of pedestrian traffic accidents may be that the government increase the number of traffic facilities, on the one hand, and both drivers and pedestrians make their own efforts to develop a desirable traffic culture, making emphasis on the virture of concession, on the other.
최완석 대한영상의학회 1984 대한영상의학회지 Vol.20 No.3
The advantages of computerized tomography in evaluation of the osseous pelvis are well known, We have analyzed the CT findings of 11 various osseous diseases in the pelvis. CT appeared to be the most efficient tool in evaluating the location and extent of the primary lesion as well as the invasion of the surroundings.