• 환경영향평가
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• 제30권2호
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• pp.61-74
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• 2021

본 연구에서는 해양에서 진행되는 개발사업으로 인하여 해양환경에 미치는 영향을 효율적으로 판단할 수 있는 평가지수들을 비교·검토하였다. 해양수질 분야에는 수질평가지수(WQI), 해양저질 분야에는 유해화학물질 정화지수(CIHC), 부영양화 정화지수(CIET), 농축계수(EF), 해양저서생물 분야에는 저서건강도지수(BHI), 저서오염지수(BPI)를 선정하였다. 개발사업에서 관측된 자료를 각각의 평가지수에 적용하여 평가지수의 특성 및 효용성을 파악하였다. 수질평가지수, 유해화학물질 정화지수, 저서건강도지수가 평가방법 및 평가기준이 명확히 정의되어 있으며, 통합적인 환경영향 분석이 가능하였다. 동 연구에서 제시된 지수이외에도 해양환경을 평가하는 다양한 지수가 있으며, 사업별 특성에 따라 적합한 지수를 활용하는 것도 중요하다.

• 한국컴퓨터정보학회논문지
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• 제16권4호
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• pp.29-42
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• 2011

본 연구는 그린화 성능을 고려한 데이터센터의 평가지표를 개발하는 것을 목표로 한다. 이를 위해 다음과 같은 연구를 수행하고자 한다. 첫째, 데이터센터에 관련된 기준과 표준을 조사한다. 이 기준과 표준을 활용하여 그린화 성능을 고려한 데이터센터 모형을 제시한다. 이모형은 데이터센터에서 그린화 성능에 영향을 미치는 주요 구성요소들 간의 상관관계를 작업량-에너지-열로 표현한 것이다. 둘째, 이모형을 이용하여 그린화 성능 평가항목과 평가지표 그리고 평가방법을 제안한다. 셋째, 기기 수준과 데이터센터 수준의 그린화 성능을 평가하는 기준들에 대한 현황을 파악한다. 이를 통해 데이터센터의 그린화 성능에 영향을 미치는 요인을 고려할 수 있을 것이다. 마지막으로 기존의 그린화 성능 평가도구들을 조사하여, 제안하는 평가항목과 지표의 향후 필요한 개선점을 식별하고자 한다.

• Journal of Electrical Engineering and Technology
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• 제12권2호
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• pp.689-700
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• 2017

This paper presents an effective approach for wind turbine (WT) condition assessment based on the data collected from wind farm supervisory control and data acquisition (SCADA) system. Three types of assessment indices are determined based on the monitoring parameters obtained from the SCADA system. Neural Networks (NNs) are used to establish prediction models for the assessment indices that are dependent on environmental conditions such as ambient temperature and wind speed. An abnormal level index (ALI) is defined to quantify the abnormal level of the proposed indices. Prediction errors of the prediction models follow a normal distribution. Thus, the ALIs can be calculated based on the probability density function of normal distribution. For other assessment indices, the ALIs are calculated by the nonparametric estimation based cumulative probability density function. A Back-Propagation NN (BPNN) algorithm is used for the overall WT condition assessment. The inputs to the BPNN are the ALIs of the proposed indices. The network structure and the number of nodes in the hidden layer are carefully chosen when the BPNN model is being trained. The condition assessment method has been used for real 1.5 MW WTs with doubly fed induction generators. Results show that the proposed assessment method could effectively predict the change of operating conditions prior to fault occurrences and provide early alarming of the developing faults of WTs.

• 한국환경복원기술학회지
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• 제21권1호
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• pp.119-132
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• 2018

This study was conducted to suggest an assessment indices to evaluate the ecosystem services of the unique functions of wetlands as well as economic value provided by the village wetlands. The assessment indicators applied in this study were used by the RAM indices. The results of RAM assessment on the village wetlands in Cheonan city were analyzed by item and critical functions of the village wetland. They were derived by assessment indicators of ecosystem services, and the village wetland ecosystem were presented by Focus Group Interview (FGI). The 20 critical indices were selected from 52 different indices by analyzing the wetland function assessment items. 13 indicators excluding duplicate indexes by function, were selected as ecological service impact indicators. Finally, ecosystem services were evaluated by using AHP analysis to calculate the weight of each assessment indices and apply it to the 9 village wetlands. The results of this study confirmed that the functions of the village wetlands are compliant with the ecosystem services. Based on this assessment of the unique functions of wetlands, it will serve as a methodology for assessing ecosystem services. The study was also conducted on 49 wetlands in Cheonan. The detailed assessment of wetland ecosystem services based on the wetland ecosystem function proposed by this study, was further developed as a follow-up study. It suggested that the wetland areas should be compared and be used as a general standard. In addition to the assessment of the economic value of ecosystem services provided by the village wetlands, it would be useful to assess the unique features and convert them into value.

• 해양환경안전학회지
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• 제21권6호
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• pp.704-711
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• 2015

본 연구에서는 침몰선박 위해도 평가항목 및 평가지수를 개정하고 신규항목을 도출하기 위해 전문가를 대상으로 AHP 기법의 설문을 실시하였다. 설문조사 결과, 사고원인 및 조류영향 등 두개의 신규항목을 도출하였으며 하나의 그룹으로 평가되었던 독성액체물질과 연료유적재량, 폭발성가스는 각각 평가하는 것이 적합한 것으로 나타났다. 이에 따라 기존 일곱 개 평가항목을 열한 개 항목으로 조정하여 평가항목별 지수를 분석한 결과, 독성액체물질, 유출가능성, 폭발성가스, 연료유적재량, 해역환경민감도, 해상교통환경, 사고원인, 조류, 여유수심, 선박종류, 선박규모 순으로 평가지수가 나타났다. 특히, 신규 도출된 평가항목 지수를 기존 위해도 평가항목과 비교해 보았을 때 해역환경민감도와 유출가능성 항목은 기존 평가지수 보다 높게 나타났고, 여유수심 항목의 평가지수는 더 낮게 나타났다.

• The Korean Journal of Ecology
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• 제20권5호
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• pp.303-313
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• 1997

A new evaluation technique, i.e. multicriterion matrix technique, on the vegetation assessment was proposed and compared with several techniques having been previously used in the environmental impact assessment. Four criterias and 10 subcriterias were selected for two evaluation indices such as vegetation naturalness value and vegetation class. These criterias were characterized by syntaxonomical informations of hemeroby concept and potential vegetation, hierarchical system between criterias, and ordinal scale of vegetation naturalness valuse. Vegetation naturalness values were classified into 11 ordinal levels and condensed to five vegetation classes for facilitating practical use. In the example study two sites were compared by using two indices. This technique could have useful applications for ssessment of regional vegetation. A vegetation map of naturalness described by combination of two indices was proposed in order to illustrate regional vegetation naturalness.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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• pp.144-147
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• 2003

This paper presents a nonlinear finite element analysis procedure for the seismic performance assessment of reinforced concrete bridge piers using damage indices. The accuracy and objectivity of the assessment process may be enhanced by the use of sophisticated nonlinear finite element analysis program. A computer program, named RCAHEST(Reinforced Concrete Analysis in Higher Evaluation System Technology), for the analysis of reinforced concrete structures was used. Damage indices aim to provide a means of quantifying numerically the damage reinforced concrete bridge piers sustained under earthquake loading. The proposed numerical method for the seismic performance assessment of reinforced concrete bridge piers is verified by comparison with the reliable experimental results.

• 환경영향평가
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• 제1권1호
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• pp.31-40
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• 1992

As the environmental concerns in Korea have shifted gradually from the environmental pollutions to the quality of life (QOL) enhancement, it has become increasingly important to implement comprehensive assessment of environmental quality as possible. This is the major reason to develop Environmental Assessment Index. This study focuses on indices development of factors in Environmental Impact Statement Preparation Regulation. Environment in this regulation is composed of natural environment, life environment and socio-economic environment, and it is composed of 22 factors. EAI(Environmental Assessment Index)studied in this research is integrated by 16 factors. It will contribute to public participation in Environmental Impact Assessment process and environmental policy.

• 생태와환경
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• 제56권1호
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• pp.70-82
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• 2023

본 연구에서는 국내 3개 호소에서 채집된 동물플랑크톤을 이용하여 호소생태계 건강성 평가에 적합한 동물플랑크톤 지수를 선별해내고자 하였다. 미국 EPA의 National Lake Assessment에서 사용된 후보지수를 국내 적용에 적합하도록 변형하였다. 변형된 지수를 MMI 개발 개요에 맞춰 개별 지수의 적합성 평가, 교란 요인에 대한 반응성 평가, 각 범주 내 중복 지수의 제거 과정을 거쳐 최종적인 후보지수를 선별하여 제시하였다. 6개 범주 내에서 범주별 최대 5개의 지수가 선별되어 최종적으로 19개 지수가 제시되었으며, 모든 분류군에서 종 다양성이, 대형 지각류와 요각류의 경우 생체량이, 소형 지각류와 윤충류의 경우에는 개체밀도가 효과적인 평가 지표로써 사용될 수 있는 것으로 분석되었다. 본 연구에서는 동물플랑크톤을 이용한 국내 호소 건강성 평가 지수의 개발에 있어 적합한 방법을 제시하여 이후 동물플랑크톤 MMI 연구에 활용될 수 있도록 하였다.

• 한국물환경학회지
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• 제25권4호
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• pp.606-614
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• 2009

To evaluate the biological water quality, diatom-based biological indices (DAIpo and TDI) were examined in the Sum-River and the Dal-stream. Having BOD concentrations below $2mg{\cdot}L^{-1}$ in most sites, water quality of both rivers was good. The DAIpo and TDI values ranged from 29.8 to 91.4 and from 38.7 to 93.0 respectively. From the biological water quality assessment, DAIpo and TDI for both rivers displayed fair to fairly poor water quality levels. However, the two indices showed more polluted conditions than expected from the BOD vlaues. In addition, DAIpo, having wider range of differences, appears to be more sensitive to the change in water quality when compared to TDI values. Statistical analysis using principal component analysis showed that Nitzschia palea and Diatoma vulgare might not be the appropriate indicators due to their low correlations with other indicators.