• Journal of the Korean Institute of Landscape Architecture
• /
• v.50 no.2
• /
• pp.23-40
• /
• 2022

Many constructed wetlands have been installed in dam reservoirs nationwide for ecological purification of watershed pollutants, but aging and reduced efficiency are becoming issues. To improve the management of constructed wetlands, an objective evaluation of structural suitability is required. This study evaluated 39 constructed wetlands of 15 dams. First, through fogus group interview(FGI), survey analysis, and analytic hierarchy process(AHP), eight evaluation items in the physical and vegetative aspects were selected and the evaluation criteria applied with weights were prepared. Second, as a result of the structural suitability evaluation, the average score of the overall constructed wetlands was 80.8, with 10 sites rated as 'good grade(91~100)', 22 sites rated as 'normal grade(71~90)' and 7 sites rated as 'poor grade(70 or less)'. The average score of physical structure evaluation was 52.6, with 14 sites rated as 'good', 21 sites as 'normal' and 4 sites as 'poor'. The suitability of location was good level in most constructed wetlands, but the water supply system, depth of water, ratio of length-to-width, and slope of flow channel were evaluated as 'normal' or less in constructed wetlands of 50% or more. Therefore, it was found that overall improvement was necessary for stable flow supply and flow improvement in the constructed wetland. The average score of vegetative structure evaluation was 28.2, and about 84% of them were identified as 'normal' or lower. As a result of analyzing the Spearman's correlation coefficient between the physical structure evaluation score and the vegetation structure evaluation score, there was a significant correlation(r = 0.728, p < 0.001), and it was found that each evaluation factor also influences each other. As a result of the case review of 6 constructed wetlands, the appropriateness of the evaluation results was confirmed, and it was found that the location, flow rate supply, and type of wetland had a great influence on the efficiency and operation of the wetland. Through this study, it will be possible to derive structural weaknesses of constructed wetlands in dam reservoirs as a nature-based solution, to prepare types and practical alternatives for improved management of each constructed wetland in the future, and to contribute to enhancing various environmental functions.

• Journal of Practical Agriculture & Fisheries Research
• /
• v.20 no.1
• /
• pp.107-123
• /
• 2018

The global impact of climate change on agriculture is now increasing. The purpose of this study was to investigate the effect of climate change on livestock productivity. The variables that have the greatest influence on climate change factors were examined through previous studies and expert surveys. We also used the actual productivity data of livestock farmers to investigate the relationship with climate change. In order to evaluate the climate for changes in livestock productivity, national representative data (such as bullocks, dairy, pigs, laying hens, and broilers) were surveyed in Korea. Also, to select and classify evaluation indexes, we selected climate change factor variables as prior studies and studied the weighting factor of climate variable factors. In this study, the researchers of industry, academia, and farmers in the livestock sector conducted questionnaires on the indicators of vulnerability to climate change using experts, and then weighed the selected indicators using the hierarchical analysis process (AHP). In order to verify the validity of the evaluation index, was examined using domestic climate data (temperature, precipitation, humidity, etc.). Correlation and regression analysis were performed. The empirical relationship between climate change and livestock productivity was examined through this study. As a result, we used data with high reliability of statistical analysis and found that there are significant variables.

• Journal of the Korean Society for Railway
• /
• v.10 no.2 s.39
• /
• pp.103-111
• /
• 2007

The existing design materials by document type are restricted in searching and acquiring necessary design information because the materials consist of huge information and various document types. This study suggests a methodology to develop an electronic technical manual that can manage construction design materials by XML-base integrated information system. Electronic technical manual for design materials can provide visualized information through various multimedia tools such as multi-link, virtual reality and animation. Using an integrated electronic manual for construction project can prevent to miss necessary design information. The results of this study includes a data flow diagram to develop an interactive electronic technical manual (IETM) for construction design information. Finally the study suggests some scenarios for practical use and quantitative analysis of application effect analysis by AHP method.

• Journal of the Korea Institute of Building Construction
• /
• v.8 no.4
• /
• pp.53-59
• /
• 2008

Cost estimates are very important to their decision-making in the early stages of a construction project. So Clients have wanted not only to know the results of conceptual cost estimates but also to assess their quality Conceptual cost estimates process is very complex process, so the results of cost estimates are influenced by various factors. So the purpose of this study is to reveal the key factors which influence the reliability of conceptual cost estimates in building construction projects. The analytic hierarchy process is used to determine the relative important weights of elements influencing the conceptual cost estimates. And factor analysis is used to reveal the key factors from the elements that influence the conceptual cost estimates. The results showed that the key factors is an experience level, available data level, level of will for winning the bid, difficulty level of conceptual cost estimate, uncertainty level.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.21 no.2
• /
• pp.15-20
• /
• 2013

In order to set up the optimal required capabilities to satisfy a variety of domestic and foreign demands for the Tilt-rotor UAV, MOE(Measure of Effectiveness) hierarchy was designed through an expert discussion, and the weight of the MOE was determined by utilizing AHP method. The independent MOE assessment on the required capabilities was accomplished for the current configuration, available alternatives and foreign competitive UAVs. Finally the cost-effectiveness for the alternative and competition UAV was analyzed.

• Proceedings of the Korean Information Science Society Conference
• /
• 2011.06d
• /
• pp.202-205
• /
• 2011

서비스 제공자와 사용자 간 이해관계를 유지하고, 제공되는 IT 서비스의 수준을 개선하기 위해서 서비스 수준관리가 필요하다. 그러나 무형의 IT 서비스는 정성적인 방법으로 평가될 수밖에 없는 한계가 존재 한다. 따라서 본 연구에서는 서비스 사용자가 동의할 수 있는 정량적 데이터를 바탕으로 서비스 품질을 향상시키는 개선 모형을 제시하였다. 이를 위해 기존 연구를 살펴보고 서비스 수준 관리 체계를 정립하였다. 본 논문에서 제시하고 있는 서비스 품질 개선 모형은 크게 4가지 방법으로 나누어 설명하였다. 첫 번째 우선관리지표를 선정하기 위해 AHP기법을 활용하였고, 두 번째 통계적 관리기법인 관리도를 이용하여 서비스 기대수준을 정의하는 방법을 제시하였다. 그리고 세 번째 측정되는 서비스 수준의 이상 유무 또는 이상 징후를 발견할 수 있는 관리도 사용방법을 설명하였다. 마지막 네 번째는 이상 원인을 해결한 후 서비스 기대수준을 재조정하는 방법을 설명하였다. 향후 연구 결과를 실제 조직에 적용시켜 검증함으로써 완성도를 높여 나감은 물론, 원인 분석 및 해결 방안에 대한 구체적인 대안을 제시하는 연구가 수행되어야 할 것이다.

• Korean System Dynamics Review
• /
• v.11 no.3
• /
• pp.61-86
• /
• 2010

This research analyzed on the future energy society of Korea in 2030 using system thinking approach. Key uncertainty factors determining the future energy society were analyzed in a multi disciplinary view point such as politics, economy, society, ecology and technology. Three causal loop diagrams for the future energy system in Korea and related policy leverages were shown as well. 'Global economic trends', 'change of industrial structure' and 'energy price' were identified as key uncertainty factors determining the Korean energy future. Three causal loop diagrams named as 'rate of energy self－sufficiency and alternative energy production', 'economic activity and energy demand' and 'Excavation of new growth engines' were developed. We integrated those causal loop diagrams into one to understand the entire energy system of the future, proposed three strategic scenarios(optimistic, pessimistic and most likely) and discussed implications and limits of this research.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2017.07a
• /
• pp.178-179
• /
• 2017

우리나라의 최대 철강회사인 포스코는 2005년부터 품질개선을 위해서 포스코 자체의 혁신방법론인 QSS+(Quick Six Sigma)을 개발하여 실시하고 있다. QSS+는 회사 전체 직원이 개선 실천 학습을 하고, 지속적인 낭비제거를 통해 부가가치를 창출하는 활동으로 '일상개선 활동, 과제 활동, 솔선/격려활동, 인재양성' 4개의 축으로 운영되고 있다. 또한 QSS+는 오랜 시간에 걸쳐 정착되어 정부 기관, 기업, 그룹사, 외주파트너사, 공급사 및 다양한 분야에서 우수 혁신 활동 사례로 벤치마킹을 실시하고 있다. 매년 현장에서 활동하는 포스코 QSS+ 현 수준을 정확히 판단하고 향후 방향성을 제시하는 QSS+ 충실도 평가 기준을 개선하기 위하여 AHP 분석 방법을 통해 평가 항목을 분석하고 현장이 반영된 'QSS+ 평가 기준'을 제시하고자 한다.

• Journal of the military operations research society of Korea
• /
• v.26 no.2
• /
• pp.55-74
• /
• 2000

A knowledge-based with production rules is a representation of static knowledge of an expert. On the other hand, a real system such as the stock market is dynamic in nature. Therefore we need a method to reflect the dynamic nature of a system when we make inferences with a knowledge-based system. This paper suggests a strategy of dynamic inference that can be used to take into account the dynamic behavior of decision-making with the knowledge-based system consisted of fuzzy production rules. A degree of match(DM) between actual input information and a condition of a rule is represented by a value [0,1]. Weights of relative importance of attributes in a rule are obtained by the AHP(Analytic Hierarchy Process) method. Then these weights are applied as exponents for the DM, and the DMs in a rule are combined, with the Min operator, into a single DM for the rule. In this way, the importance of attributes of a rule, which can be changed from time to time, can be reflected in an inference with fuzzy production systems.

• Journal of the Korea Safety Management & Science
• /
• v.2 no.1
• /
• pp.41-57
• /
• 2000

작업부하 산정 모델을 개발하기 위해 인간-기계 시스템 환경에서 작업자의 작업성 취 및 생산성에 영향을 미치는 내적·외적 작업부하 요인들을 발견하여 이를 모델개발 에 고려하였다. 이들 작업부하 요인들이 작업자에 감지되는 정도에 대한 반응을 5점 척도를 도입하여 숫자가 아닌 자연어로 할 수 있게 하였으며 이렇게 작업자에 의해 주관적으로 판단된 작업스트레스 요인들은 각기 다른 가중치를 판단하기 위해 AHP(Analytic Hierarchy Process)를 사용하여 작업자가 직접 느끼는 작업부하 스트레스 정도를 비교판단 하게 하였고 이렇게 개념화된 모델을 실제 산업현장에서 사용할 수 있도록 컴퓨터를 통한 시험적인 작업부하 분석시스템을 개발하였다. 본 연구에 대한 검증을 위하여 실제 산업체에 종사하는 작업자들을 대상으로 인간공학적 작업부하 모델을 적용하여 측정하고 이를 작업자의 생리학적인 변화와의 관계를 비교 분석하여 본 결과 본 논문에서 개발된 모델은 작업부하 스트레스를 비교적 정확하게 측정할 수 있어서 앞으로 산업현장에 적용될 수 있는 신뢰성 있는 연구로 판단된다.