• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2002년도 춘계학술대회 발표논문집
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• pp.74-84
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• 2002

본 연구에서는 1970년 Royall에 의해 표본추출방법의 한 대안으로서 다시 주목받기 시작한 균형추출방법(purposive selection or balanced sampling)과 확률추출방법(random sampling)의 장.단점을 층화추출법과 비추정량의 경우를 예로 들어 비교하고자 한다. 균형추출방법은 강건성(robustness)과 효율성(efficiency) 측면에서 확률추출방법은 추출의 간편성과 사회적 인식 측면에서 각각의 장점을 지니고 있는 것으로 볼 수 있다.

• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2002년도 춘계학술대회 발표논문집
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• pp.137-156
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• 2002

인터넷 조사는 전통적인 조사방법에 비해 신속하고 저렴하며 멀티미디어를 이용한 고도화된 설문을 사용할 수 있다는 장점이 있는 반면 표본을 확률 추출하는 것이 어렵고, 대표성, 무응답 등의 비표본 오차가 심각하다. 본 연구에서는 비표본 오차 중 무응답 오차를 사례와 함께 정리하고, 인터넷 조사가 새로운 조사 방법으로서 활용될 수 있는 대안을 제시한다.

• 한국경영과학회지
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• 제9권2호
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• pp.46-55
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• 1984

The purpose of this parer is to provide a survey of the state of the art of routing methods in store-and-forward computer networks. The survey is carried out in line with a new taxonomy： heuristic methods, user-optimization methods, and system-optimization methods. This taxonomy on routing algorithms is based on two viewpoints： the level of optimization and the relative difficulty for the implementation in real computer networks. Some actual methods implemented in real computer networks are surveyed as well as the theoretical studies in the literature. This paper concludes with some points in need of further researches.

• 한국조사연구학회지:조사연구
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• 제2권1호
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• pp.73-86
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• 2001

본 논문은 복합표본조사 분석에서 회귀모형 접근법으로 사용되는 모형 기반 접근법, 설계 기반 접근법과 일반화 추정 방정식 접근법을 설명하고, 이들을 실증적으로 비교한 것이다. 또한 설계 기반 접근법과 일반화 추정 방정식 접근법에 대해서 설계효과와 가중치 효과 분석을 통해서 표본 설계가 모수 추정에 미치는 영향을 살펴보았다.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2004년도 Sharing Experience of Human and Ecological Risk Assessment and Management in Asia/Pacific Region
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• pp.76-77
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• 2004

• 환경영향평가
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• 제22권5호
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• pp.455-466
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• 2013

The aim of this study is to seek application plans of National Ecosystem Survey database based on comparison and examination of feasible analysis methods for distribution characteristics of alien plants. In order to set up a correlation analysis method between alien plants and environmental factors, we had reviewed the 3rd National Ecosystem Survey guide book and consequently, two kinds of analysis method were tested. One was 1/25,000 scale map boundary based analysis and the other was representative mountain area based analysis. In this study we restricted the research area to select reliable surveyed database from whole "2011 National Ecosystem Survey flora database" according to two major criteria. First, an area defined by 1/25,000 scale map boundary and representative mountain area where the number of surveyed flora records should be within top 20%. Second, land cover map should also be built up inside that area. As a result, 25 map boundaries and 25 representative mountain areas were extracted to be analyzed. To limit a boundary for every representative mountain area we had analyzed distribution of environmental factors around that area by manual inspection with SPOT-5 remote sensed satellite image then designated 3km buffer zone from each alien plant location in that area. After then, naturalized index (NI) and urbanized index (UI) was calculated and correlations analysis was carried out. With the result of correlation analysis by map boundary only agricultural land area showed significant value of r (0.4~0.6, correlated) and the rest of factors did not. In the case of representative mountain area, the result showed that agricultural land, road and forest area showed significant value of r (0.6~0.8, highly correlated) which was corresponding to existing researches. Therefore, representative mountain area based method is preferable when using the alien plants database of National Ecosystem Survey for species distribution analysis. And also, considering the way of database utilization is strongly suggested at the first stage of survey planning for promoting active use of national ecosystem survey database.

• 유통과학연구
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• 제17권4호
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• pp.77-85
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• 2019

Purpose - Statistics of Traditional Market is the only source of information on traditional markets, shopping street, and underground shopping street. The government conducts a survey of traditional market conditions every year to look at the current status of traditional markets and provide effective support. Therefore, this study examines the necessity and validity of updating about the Survey Population of Traditional Market Research design, data, and methodology - This study investigated the necessity of updating about the Survey Population of Traditional Market through literature review. Therefore this study examined the necessity of the current population based on the review of the population related to the sample design, methods, and the sampling frame. Next, we examined the change patterns of the population and the sample by dividing the population and sample of the current survey of the traditional market survey into the market unit, the store unit within the market, and finally the individual store unit. Results - As a result, the population of traditional market changes about 4~6%. Next, the analysis of the store unit in the market shows that the number of stores is very variable even though the market is continuously included in the survey target. Finally, as a result of examining the characteristics of individual stores, the stores with less than one year were more than 6% of the total surveyed stores based on the traditional market. These results are generally inconsistent with the idea that stores in traditional markets will operate for a long time in one place. Next, we proposed the establishment of a management system, applying Citizen Generated Data, and circulation survey. Additionally, this study proposes to change the stratification variables at the regional level rather than the market unit. Conclusions - Therefore, in this study, it is suggested that a current population of traditional market is needed updating, and that a population survey should be updated at least four years. In addition, a system for investigating traditional markets and districts was established and a circulation survey was proposed for efficient use of budgets. Based on these research results and policy suggestions, the future research directions are suggested.

• Communications for Statistical Applications and Methods
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• 제9권3호
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• pp.665-674
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• 2002

The advantage of internet survey compared to the traditional survey methods are speedy in data collection, cost-effective, high performed design and able to data process and analysis at the same time. The other side are difficult to select sample, come from serious nonresponse errors. We suggest the new internet survey method to the questionnaire design that have the high response rate, enough to advanced preparations and system stability.

• 한국조사연구학회지:조사연구
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• 제5권1호
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• pp.1-26
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• 2004

The aim of this study lies in answering the question "How to form weighting cells to enhance sample representativeness in telephone, Internet and mobile surveys\ulcorner". For this, we explored 2% raw data of Year 2000 Population and Housing Census of Korea looking for meaningful patterns for ownership of telephones, the usage of Internet and/or mobile phones. We found that telephone coverage rates vary significantly by household size; 84.6% for one member households, contrasting 98.5% for two-or-more member households. Thus, telephone survey samples need to be weighted differently in sub-groups by household size for proportional representation of target population. Searching socio-demographic factors influencing the use of Internet by C5.0 tree models, we found that education levels and the occupation (or housing type, the automobile ownership) are two most important factors in addition to gender and age. Thus, surveyor might form weighting cells by such factors at the stage of post-stratification or set quotas, a priori, proportional to size of the cells by such factors. For mobile surveys, we approached similarly and found that education levels and the occupation (or the automobile ownership, marriage status) are two additional factors that may be used in forming weighing cells or in setting quotas for cells.

• 한국조사연구학회지:조사연구
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• 제7권2호
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• pp.39-52
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• 2006

우리나라 대다수 조사전문기관은 지역 성 나이대 할당표본추출에 의한 전화조사를 하고 있다. 그러나 평일에는 인구사회적 속성에 따른 개인별 재택률의 차이가 심하므로 체계적 응답자선택편향(respondent selection bias)이 우려된다. 문제 해결을 위해 조사시간대를 할당변수로 추가한 '시간균형할당표본추출'(time-balanced quota sampling) 방법과 저녁시간대 할당을 부분적으로 완화한 '시간균형준할당표본추출'(time-balanced quasi-quota sampling) 방법을 제안한다. 그리고 우리나라 통계청에서 2004년에 수집한 생활시간조사 원자료를 가상적 모집단으로 설정하여 새로운 할당추출법과 기존할당추출법에 의해 얻는 몬테칼로 표본들을 비교할 것이다.