• 자원ㆍ환경경제연구
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• 제10권3호
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• pp.345-366
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• 2001

Evaluating environmental impacts of regional development projects has critical importance in environmental management aspect. This paper uses multi-attribute utility theory as a basis for obtaining a value index to assess the environmental impacts and applies the theory to a specific Korean case study. To structure and quantify basic values for the assessment, we elicited important attributes, then refined and structured them into a hierarchy. An environmental multi-attribute index is constructed as a multi-attribute utility function, based on value judgments provided by a group of technical experts, policy makers, and a decision-maker at Korean Ministry of Environment. The implications of the results are also discussed. We found that the work and results can provide valuable insights for assessment of environmental consequences.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2001년도 춘계학술대회:발표자료
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• pp.389-408
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• 2001

Evaluating the results of National Nuclear R&D projects has critical importance in nuclear management aspect. This paper uses multi-attribute utility theory as a basis for obtaining a value Index to assess the results of nuclear R&D projects and applies the theory to a specific Korean case study. To structure and quantify basic values for the . evaluation, we elicited important attributes, then refined and structured them into a hierarchy. A multi-attribute index is constructed as a multi-attribute utility function, based on value judgments provided by a group of technical experts, policy makers, and decision-makers. The implications of the results are also discussed. We found that the work and results can provide valuable insights for assessment of nuclear R&D consequences.

• 한국IT서비스학회지
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• 제7권1호
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• pp.117-130
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• 2008

Multi-attribute risk assessments provide a useful framework for systematic quantitative risk assessment that the security manager can use to prioritize security requirements and threats. In the first step, the security managers identify the four significant outcome attributes(lost revenue, lost productivity, lost customer, and recovery cost). Next. the security manager estimates the frequency and severity(three points estimates for outcome attribute values) for each threat and rank the outcome attributes according to AHP(Analytic Hierarchy Process). Finally, we generate the threat index by using muiti-attribute function and make sensitivity analysis with simulation package(Crystal Ball). In this paper, we show how multi-attribute risk analysis techniques from the field of security risk management can be used by security managers to prioritize their organization's threats and their security requirements, eventually they can derive threat index. This threat index can help security managers to decide whether their security investment is consistent with the expected risks. In addition, sensitivity analysis allows the security manager to explore the estimates to understand how they affect the selection.

• 기술혁신학회지
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• 제5권1호
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• pp.90-109
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• 2002

The national nuclear R&D projects have been implemented for the purpose of supply of nuclear power which was proved to be safety and stability. Evaluating the national nuclear R&D projects has critical importance in nu-clear energy management aspect. This paper employs multi-attribute utility analysis as a basis for obtaining an evaluation index to assess the national nuclear R&D projects using a specific case study of Korea. To structure and quantify basic values for the evaluation, we elicited important attributes, then refined and structured them into a hierarchy. A multi-attribute index is constructed as a multi-attribute utility function, based on value judgments provided by a group of technical experts, policy makers, and faculties. As a result, the objective of attainment of a proposed object is given the highest priority, followed by appropriateness of project and research strategy, utilization of research output, within attribute ranges defined for the attributes. We found that the work and results of this study can provide valuable insights and decision opportunities for virtually all major decision making in evaluation of the national nuclear R&D projects in Korea.

• Structural Monitoring and Maintenance
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• 제5권1호
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• pp.67-78
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• 2018

The stability of cutting slope influences the safety of railway operation, and how to identify the stability of the slope quickly and determine the rational monitoring plan is a pressing problem at present. In this study, the attribute recognition model of risk assessment for high cutting slope stability in the heavy haul railway is established based on attribute mathematics theory, followed by the consequent monitoring scheme design. Firstly, based on comprehensive analysis on the risk factors of heavy haul railway loess slope, collapsibility, tectonic feature, slope shape, rainfall, vegetation conditions, train speed are selected as the indexes of the risk assessment, and the grading criteria of each index is established. Meanwhile, the weights of the assessment indexes are determined by AHP judgment matrix. Secondly, The attribute measurement functions are given to compute attribute measurement of single index and synthetic attribute, and the attribute recognition model was used to assess the risk of a typical heavy haul railway loess slope, Finally, according to the risk assessment results, the monitoring content and method of this loess slope were determined to avoid geological disasters and ensure the security of the railway infrastructure. This attribute identification- risk assessment- monitoring design mode could provide an effective way for the risk assessment and control of heavy haul railway in the loess plateau.

• 한국정보처리학회논문지
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• 제7권8호
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• pp.2298-2309
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• 2000

본 논문에서는 객체지향 데이터베이스의 중포속성에 대한 색인기법으로 다차원 색인구조를 이용하는 다차원 중포속성 색인기법은 MD-NAI를 제안한다. 중포석성에 대한 기존의 색인기법들은 중포된 객체에 대한 기존의 색인기법들은 B+-tree와 같은 일차원 색인구조를 이용함으로써, 클래스 계층과 중포속성이 포함된 복합 형태의 질의들에 대한 처리를 잘 지원하지 못한다. MD-NAI에서는 객체지향 데이터베이스의 클래스 계층에 대한 색인기법인 이차원 클래스 계층 색인기법(2D-CHI)을 다차원으로 확장한다. 2D-CHI는 키 속성 도메인과 클래스 식별자 도메인으로 구성된 이차원 도메인 공간상에서 객체들의 클러스터링을 다루는 색인기법이다. 본 논문의 MD-NAI에서는 색인된 중포속성을 표현하는 경로상의 각 클래스 계층마다 하나의 클래스 식별자 도메인을 할당하여 구성된 다차원 도메인 공간상에서 색인 엔트리들의 클러스터링을 다룬다. 따라서, MD-NAI에서는 기존의 색인기법에서 지원하기 어려운 질의의 대상 범위 클래스 계층상의 임의의 클래스들로 제한되거나, 질의에 포함된 복합속성들의 도메인이 클래스 계층상의 임의의 클래스들로 제한되는 경우에도 잘 지원할 수 있다.

• 자원ㆍ환경경제연구
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• 제12권3호
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• pp.487-513
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• 2003

환경의 지속가능한 개발을 평가하기 위해서는 환경정보의 통합이 이루어져야 하며, 그 구체적인 수단으로 환경지표와 지수의 개발이 선행되어야만 한다. 해양환경 종합지수의 작성은 해양환경계정의 기초작업으로서 의의를 가지며, 해양국가인 우리 나라에 있어 매우 유용한 연구가 될 수 있다. 또한 지수의 형태에 있어서도 국내 해양환경의 전반적인 환경상태를 나타내는 해양환경 종합지수와 각 해양부문별 상태를 나타내는 부문해양환경지수의 개발이 적절하다. 따라서 본 연구에서는 1991년부터 2001년까지의 우리나라의 해양환경 종합지수를 도출해 보고자 한다. 해양환경 종합지수는 압력-상태-대응(pressure-sate-response PSR)체계를 따르며, 지수의 각 항목 및 가중치의 도출은 다속성 효용이론(multi-attribute utility theory : MAUT)을 적용한다. 본 연구에서 작성한 해양환경 종합지수는 해양환경에 대한 연도별 압력지수, 상태지수, 대응지수와 동해, 남해, 서해의 해역별 상태지수를 제공한다.

• 대한한의진단학회지
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• 제13권1호
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• pp.72-80
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• 2009

Objective: We performed this study to check relationship of Cold-Heat attribute analyzed quantitatively by questionnaire with acoustic analysis index. Method : We checked a questionnaire composed of 15 items about the contents of Cold-Heat and asked 83 subjects to answer in the form Likert-like 7-points score. And then, we extracted Cold-Heat attribute from heat score, cold score, heat index and cold index. we measured the acoustic analysis indexes of cardinal vowels by Dr. speech program. Afterward, the data were analyzed by correlation analysis. Results : All cardinal vowels is positive correlated with cold score, heat score and cold index. NNE of vowel /a/ is negative correlated with cold index. Shimmer and F0 tremor of vowel /e/ is negative correlated with cold index. Jitter of vower /u/ is positive correlated with Cold score.

• 품질경영학회지
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• 제50권4호
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• pp.863-876
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• 2022

Purpose: The purpose of this study is to propose the product quality satisfaction index based on multiple linear regression using customer reviews. Methods: The proposed framework is composed of four steps. First, we collect online reviews and divide it into insight phrases. The insight phrases are classified using product attribute dictionary and sentiment analysis is conducted. Second, the importance of attributes is calculated in consideration of both regression coefficient and frequency. Third, the positive rate is calculated concerning sentiment analysis result. Therefore, the quality satisfaction index is measured by the weighted sum of importance and positive rate in the last step. Results: We conduct a case study using 2-years(2020, 2021) of Samsung TV reviews to confirm the effectiveness of the proposed methodology. As a result, we found that Picture quality is the most crucial attribute in TV evaluation. The importance of Gaming and content has grown up as the positive rate has also increased. Therefore, the overall satisfaction of TV has increased in 2021 compared to 2020. Conclusion: The result of this study shows that the proposed index reveals the customer's mind efficiently and can be explained by the importance and positive rate of each attribute. By using the proposed index, companies are able to improve and the priority of improvement can be determined.

• 한국멀티미디어학회논문지
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• 제6권2호
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• pp.194-207
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• 2003

본 논문에서는 객체 데이터베이스 시스템에서 중포 속성에 대한 색인구조로 다차원 색인구조를 이용하는 다차원 중포 속성 색인구조(Multidimensional Hefted Attribute Index: MD-NAI)의 최적 설계 기법을 제시한다. MD-NAI는 $B^{+}$-tree와 같은 일차원 색인구조를 이용한 중포 속성 색인구조에서 지원할 수 없는 클래스 계층과 중포 속성이 포함된 복합 형태의 질의들에 대한 처리를 잘 지원할 수 있다. 그러나, MD-NAI는 사용자 질의 형태에 따라 색인검색의 성능이 매우 나빠질 수 있다 본 논문에서는 질의 형태에 따른MD-NAI의 성능 개선을 위하여, 먼저 중포 술어에 대한 질의 정보로서 색인 페이지 영역의 최적 모양을 결정하고, 이 최적 모양을 갖는 색인페이지 영역의 모양이 되도록 하는 영역분할 전략을 적용하여 최적의 MD-NAI를 구성한다. 또한, 성능평가를 위하여 MD-NAI를 이용하여 다양한 중포 술어의 형태와 객체 분포에 대하여 실시한 실험 결과를 제시한다. 성능평가의 결과에 의하면, 주어진 질의 패턴에 따라 최적 의 MD-NAI를 구성할 수 있었으며, 삼차원 MD-NAI의 경우에 질의 영역의 구간비가 1:16:256일 때 기존의 순환분할 전략에 의한 MD-NAI에 비해 성능이 5.5배 이상까지 향상되었다.