• 한국수학사학회지
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• 제20권3호
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• pp.91-104
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• 2007

본 연구에서는 대학수학 교육을 향상시키기 위한 참조 지표를 얻기 위하여 AHP를 이용하여 대학수학 성취도 요인의 상대적 중요도를 추정하는 방법을 연구하였다. 이를 위하여 AHP의 개요 및 역사를 고찰하고 설문조사에 의해 얻은 자료를 통해 쌍대비교행렬을 작성하고 고유벡터방법으로 중요도를 추정하였다.

• 응용통계연구
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• 제31권5호
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• pp.587-597
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• 2018

조사목적에 부합하는 표본 자료를 얻기 위해서는 추출방법 및 조사방법 결정, 설문지 작성 등의 절차가 필요하며 중요한 결정 중 하나가 표본크기 공식의 적용이다. 표본크기 공식은 추출방법에 따른 목표오차와 총비용 등을 설정함으로써 결정되는데 본 논문에서는 단순임의추출에서 목표오차와 예상 응답률이 주어져 있을 때 과거 및 현재 시점의 모집단의 변동과 과거 자료의 추정오차 및 응답률을 사용한 표본크기 공식을 제안한다. 실제조사에서는 설계가중치 외에도 여러 가중치가 복합적으로 적용되는 추정량을 사용하고 있는데 본 논문에서는 설계가중치와 무응답 보정계수를 사용한 추정량에서의 표본크기 공식을 유도하며 이것은 시점별 조사방법이 달라질 경우 응답률에 차이가 발생하는 현상을 반영한 공식이 될 수 있다. 또한 모의 실험을 통하여 기존의 표본크기 공식과 비교함으로써 제안된 공식의 다양한 적용방안을 살펴본다.

• 한국도로학회논문집
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• 제17권6호
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• pp.117-126
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• 2015

PURPOSES : This study prioritizes potential technology for establishing a safe work zone environment on roadways. We consider almost all conceivable technologies that enable mitigation of unexpected accidents for both road workers and drivers. METHODS : This study suggests a methodology to set the priority of potential technology for establishing a safe work zone environment by using the analytical hierarchy process (AHP). For this purpose, the AHP structure was first developed. Thereafter, a web-based survey was conducted to collect experts' opinions. Based on the survey results, weights associated with the relevant criteria of the developed structure were estimated. With the consistency index (CI) and consistency ratio (CR), we verified the estimated weights. In addition, a sensitivity analysis was performed to confirm whether the estimated weights were reliable. We finally proposed the priority for potential technology for establishing a safe work zone environment on roadways. RESULTS : In the first level, safety technology has the highest priority, and real-time information delivery for work zone, hazard warning for drivers, and temporal automated operation for traffic facilities were selected in the second level of hierarchy. CONCLUSIONS : The results imply that establishing the priority will be useful to establish a future road map for improving the work environment for road workers and drivers by employing appropriate protection facilities and developing safety systems.

• 자원ㆍ환경경제연구
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• 제9권3호
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• pp.461-487
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• 2000

Kang et al. (1999) computed a composite environmental index in Korea by practicing the survey for environmental experts. They used the weighted sum form among feasible aggregation forms. In this study, we carry out the survey for both experts and non-experts to see the degree of differences of the weights for nine types of environmental problems between two groups. In addition, we apply different aggregation forms such as linear sum, weighted sum, root-sum-power, root-mean-square forms and compare these four outcomes. We found no significant discrepancy in the trends of composite indices. In case we rely on the weights provided by the experts, the composite index, on average, has been increased annually by about 7.2% over the 1986~1997 period, which informs us that overall environmental quality in 1997 has been worse than in 1986 by about 1.8 times.

• Journal of Preventive Medicine and Public Health
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• 제46권2호
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• pp.96-104
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• 2013

Objectives: The inherent nature of the Korean National Health and Nutrition Examination Survey (KNHANES) design requires special analysis by incorporating sample weights, stratification, and clustering not used in ordinary statistical procedures. Methods: This study investigated the proportion of research papers that have used an appropriate statistical methodology out of the research papers analyzing the KNHANES cited in the PubMed online system from 2007 to 2012. We also compared differences in mean and regression estimates between the ordinary statistical data analyses without sampling weight and design-based data analyses using the KNHANES 2008 to 2010. Results: Of the 247 research articles cited in PubMed, only 19.8% of all articles used survey design analysis, compared with 80.2% of articles that used ordinary statistical analysis, treating KNHANES data as if it were collected using a simple random sampling method. Means and standard errors differed between the ordinary statistical data analyses and design-based analyses, and the standard errors in the design-based analyses tended to be larger than those in the ordinary statistical data analyses. Conclusions: Ignoring complex survey design can result in biased estimates and overstated significance levels. Sample weights, stratification, and clustering of the design must be incorporated into analyses to ensure the development of appropriate estimates and standard errors of these estimates.

• Journal of the Korean Data and Information Science Society
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• 제25권6호
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• pp.1397-1405
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• 2014

설문조사에서는 대부분 단위무응답 또는 항목무응답이 발생한다. 무응답 발생비율이 높은 경우 무응답을 무시한 분석은 잘못된 결과를 초래할 수도 있으므로 무응답에 대한 특성 파악도 필요하다. 횡단자료에서는 항목무응답 특성에 대한 연구는 가능하나 단위무응답의 특성을 파악하기가 어렵다. 단위무응답의 특성을 파악하기 위하여 본 논문에서는 종단자료인 한국아동 청소년패널조사 중 중1패널자료를 이용하였다. 최근까지 공개된 한국아동 청소년패널조사자료를 이용한 논문들의 무응답 처리 실태를 파악하고, 그 중 단위무응답의 특성에 대하여 분석하였다. 이 자료를 이용한 논문에서는 대부분 단위무응답의 처리를 제거하는 방식을 취하고 있으며, 이 자료에서 제공하고 있는 가중치를 이용한 논문은 거의 없었다. 이에 단위무응답의 처리방법 중 가중치를 이용한 방법과 그 대상을 제외하는 두 가지 방법에 대해 여러 가지 특성들의 분석을 비교하였다. 많은 항목에서 두 가지 방법의 결과가 상이하게 나타났으며, 가중치를 이용한 경우가 제거법에 의한 결과에 비해 통계적으로 유의한 결과가 더 많이 나타나 무응답에 대해 많은 논의가 필요할 것으로 생각된다.

• 한국경영과학회지
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• 제32권2호
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• pp.123-140
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• 2007

This study focuses on establishing theoretically-reasonable framework of evaluation areas and items for the informatization program and analyzing the weights for each area and item by means of the AHP. To obtain the goal of this research, firstly, based on broadly reviewing previous literature and logical reasoning, the evaluation criteria were Identified and conceptualized, which were 3 evaluation phases, 5 evaluation areas, and 22 evaluation items. Secondly, The data used for calculating the weight values for the evaluation criteria were collected from 48 academic and practical experts in the field of the informatization program promotion using internet survey. Thirdly, the relative weights among evaluation phases, evaluation areas, and its items were derived by AHP analysis. The findings of this study are thought not only to be useful as a practical guideline in performing evaluating the informatization program but also to provide significant basis for constructing the theoretical framework of evaluating method and management of the informatization program.

• 건축역사연구
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• 제27권2호
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• pp.29-38
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• 2018

This study is to find out the process of changes concerning the cadastral records that consist of the cadastre, the cadastral map and various registers of land in Japanese Colonial Period. The cadastre and cadastral map were the most important part of them and became the basis of cadastral records. These two registers were first made out according to the Project of Colonial Land Survey in the year 1912. As the influx of foreign Weights and Measures was greatly influenced by the foreign concession since 1876, the traditional units of the Weights and Measures had abolished finally. The extortion of sovereignty led a rapid change to the Weights and Measures in 1910. Japan compelled us to change into Japanese System of Measurement. From that time on, Lot(筆地) and Pyeong(坪) were settled down on the registers of land.

• 한국조사연구학회지:조사연구
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• 제11권1호
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• pp.19-41
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• 2010

순환표본조사를 시행할 경우 매 순환주기별로 적절한 통계적 신뢰도를 가진 전체 모집단 특성이 추정될 수 있는 반면에, 작은 표본크기로 인하여 통계적 신뢰도가 높은 소지역 추정량의 산출은 어렵다. 따라서 소지역 추정량은 일반적으로 일정 주기 후 혹은 전체조사가 마무리된 후 독립적인 순환표본들을 결합하여 얻어진 최종표본을 통해 산출된다. 본 연구에서 는 순환표본을 결합하여 추정량을 만들 때 필요한 가중치 산출의 문제를 고려하였다. 기존의 연구들이 각 조사에 따른 경험을 바탕으로 조사별로 가능한 순환표본 결합 가중치를 정의하였으나, 본 연구에서는 모든 가능한 관심변수에 적용 가능하도록 표본설계변수에만 의존하는 모형을 설정하고 주어진 모형하에서의 최량선형불편예측치(Best Linear Unbiased Predictor: BLUP)를 고려하였다. 모의실험을 통하여 각 모형 하에서 정의되는 여러 BLUP을 비교하여 모형변화에 강건한 추정량을 제안하고 그 결과를 제4기 국민건강영양조사에 적용하였다.

• 수산해양기술연구
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• 제46권3호
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• pp.204-213
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• 2010

Test fishing was carried out using six kinds of different mesh sizes (20, 22, 24, 28, 35, 40mm) for springnet-pot to study bycatches according to the mesh size and catches survey was done for another one (mesh size : 22mm, entrance round : 350mm) in Geo-je & Tong-young waters of Korea. On the first sea experiment, it was thought that suitable mesh size of spring-net-pot catching conger-eel over 35cm with decreasing the catches of conger-eel (Conger myriaster) below 35cm was 24mm. On the second sea experiment, commercial catches were crabs (Charybdis bimaculata), octopus minor (Octopus variabilis) and others including conger-eel, and catches proportion was 60% of total catches weights. There was no big difference for the monthly catches. Self-consumption catches were 9 species including conger-eel below 35cm holding 50% of catches in the side of weights. There were 40% of bycatches for the catches weights and 63% for catches numbers in the 22mm mesh size of spring-net-pot having entrance round over 140mm. It showed that 50% of catches weights were discarded.