• 자원ㆍ환경경제연구
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• 제17권3호
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• pp.31-59
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• 2008

본 연구는 한국과 미국의 수출입에 따른 산업별 독성물질(유해화학물질) 배출량 이전관계를 규명한 것이다. 분석에 이용된 자료는 한국과 미국에서 공동적으로 조사하는 51종의 독성물질 배출량과 2000년의 국제산업연관표이다. 분석결과, 한국의 경우, 총배출 강도가 높은 산업은 금속, 화학, 금속기계 등이며, 미국은 전자 및 가전, 화학, 플라스틱 및 고무 등에서 높은 배출강도를 나타내고 있다. 한국의 대(對)미국 수출구조는 미국의 대(對)한국 수출구조에 비해 자국의 환경에 불리한 측면을 가지고 있다. 즉, 미국의 대(對)한국 수출은 미국내 배출량 증가에 상대적으로 낮게 기여하고 있으나, 한국의 대(對)미국 수출은 한국내 배출량 증가에 상대적으로 크게 기여하고 있다.

• 자원ㆍ환경경제연구
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• 제11권4호
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• pp.581-608
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• 2002

The electric power industry has played an important role in dramatic economic development in Korea and the electricity has constituted a critical factor sustaining the well-being of the Korean people. This study uses input-output analysis to investigate the role of four electric power sectors (hydroelectric, fossil-fuels, nuclear and non-utility) in the Korean national economy for the period 1985~1998, focusing on four topics: the impacts of electricity supply investments, the electricity supply shortage effects, and the impacts of the rise in electricity rates, and the inter-industry linkage effect. The overall results reveal that non-utility electric sector is superior in terms of the national economy-wide effects to other three sectors throughout the period. Finally, potential uses of the results are illustrated from the perspective of policy instruments and some policy implications are discussed.

• 한국유기농업학회지
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• 제9권3호
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• pp.45-71
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• 2001

The duck-rice forming system is increasingly spread up throughout Korea since 1992. It is discussed the rice field, rice quality, weed and pest management in the duck-rice weeding system compared to conventional farming system. Moreover the optimizing duck population, system management and fertilizer application rate were reported. Energy input and output by duck-rice farming system were carefully compared with those of low input sustainable paddy field and conventional farming paddy field. To find out the environmentally sound function of duck-rice system, the total nitrogen in paddy soil and paddy water, and nitrogen cycle in paddy rice cultivation system were analysed. finally the input and output were calculated, and ecological characteristic were determined in terms of nitrogen balance, labor input, animal input, renewable energy input, turnover of soil organic matter, energy loss, non-renewable indirect and direct energy input. It was concluded duck-rice weeding system could be recommended in terms of net only environmentally sound, but also farmer's income. But there are still some research needs for successful adaption of duck-rice farming to investigate to determine the optimal population of duck in rice paddy field unit, release time of duckling, duck management after release, and strategy for duck marketing and duck processing.

• 환경영향평가
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• 제20권3호
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• pp.337-348
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• 2011

Urban environmental problem became one of major issues during its urbanization processes. Environmental impacts are assessed during recent urban planning and development. Though the environmental impact assessment considers meteorological impact as a minor component, changes in wind environment during development can largely affect the distribution pattern of air temperature, humidity, and pollutants. Impact assessment of local wind is, therefore, a major element for impact assessment prior to any other meteorological impact assessment. Computational Fluid Dynamics (CFD) models are utilized in various fields such as in wind field assessment during a construction of a new building and in post analysis of a fire event over a mountain. CFD models require specially formatted input data and produce specific output files, which can be analyzed using special programs. CFD's huge requirement in computing power is another hurdle in practical use. In this study, a CFD model and related software processors were automated and integrated as a microscale wind environmental impact assessment system. A supercomputer system was used to reduce the running hours of the model. Input data processor ingests development plans in CAD or GIS formatted files and produces input data files for the CFD model. Output data processor produces various analytical graphs upon user requests. The system was used in assessing the impacts of a new building near an observatory on wind fields and showed the changes by the construction visually and quantitatively. The microscale wind assessment system will evolve, of course, incorporating new improvement of the models and processors. Nevertheless the framework suggested here can be utilized as a basic system for the assessment.

• Structural Engineering and Mechanics
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• 제50권1호
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• pp.105-119
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• 2014

This study presents a steel container crane movement analysis and assessment based on structural health monitoring (SHM). The accelerometers are used to monitor the dynamic crane behavior and a 3-D finite element model (FEM) was designed to express the static displacement of the crane under the different load cases. The multi-input single-output nonlinear autoregressive neural network with external input (NNARX) model is used to identify the crane dynamic displacements. The FEM analysis and the identification model are used to investigate the safety and the vibration state of the crane in both time and frequency domains. Moreover, the SHM system is used based on the FEM analysis to assess the crane behavior. The analysis results indicate that: (1) the mean relative dynamic displacement can reveal the relative static movement of structures under environmental load; (2) the environmental load conditions clearly affect the crane deformations in different load cases; (3) the crane deformations are shown within the safe limits under different loads.

• 환경영향평가
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• 제12권4호
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• pp.271-279
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• 2003

Temperature and humidity forecasting have been performed using artificial neural networks model(ANN). We composed ANN with multi-layer perceptron which is 2 input layers, 2 hidden layers and 1 output layer. Back propagation algorithm was used to train the ANN. 6 nodes and 12 nodes in the middle layers were appropriate to the temperature model for training. And 9 nodes and 6 nodes were also appropriate to the humidity model respectively. 90% of the all data was used learning set, and the extra 10% was used to model verification. In the case of temperature, average temperature before 15 minute and humidity at present constituted input layer, and temperature at present constituted out-layer and humidity model was vice versa. The sensitivity analysis revealed that previous value data contributed to forecasting target value than the other variable. Temperature was pseudo-linearly related to the previous 15 minute average value. We confirmed that ANN with multi-layer perceptron could support pollutant dispersion model by computing meterological data at real time.

• 자원ㆍ환경경제연구
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• 제16권2호
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• pp.313-336
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• 2007

본 연구는 북한경제관련 전문기관이나 전문가들의 연구결과와 불완전하게나마 발표되거나 간접적으로 도출된 북한의 통계자료들을 통계학적인 방법으로 통합하여 에너지 부문이 구분된 북한의 2005년도 산업연관표를 추정하였다. 이렇게 추정된 산업연관표를 이용하여 에너지 부문에 대한 대북투자가 북한경제의 산업별 산출과 부가가치에 미치는 효과를 투입-산출 분석과 CGE 분석을 이용하여 계산하였다. 전력산업에 대한 40억 달러의 대북투자는 총산출을 3억 6,802만 달러 증가시키고 총부가가치를 1억 5,599만 달러 증가시키는 것으로 계산되었고 석유산업에 대한 1.5억 달러의 대북투자는 총산출을 2,046만 달러 증대시키고 총부가가치를 965만 달러 증가시키는 것으로 나타났다.

• 수산경영론집
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• 제52권4호
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• pp.45-63
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• 2021

The purpose of this study is to analyze the structure, status and economic ripple effects of the fisheries processing industry in Korea using interindustry analysis. Five input-output tables published over the past twenty years have been reclassified with a focus on the fisheries processing sector. Through these multi-period tables, we analyzed changes in the inducing effects in production, value added and employment as well as the backward-forward linkage effects. As a result of the analysis, it was found that the industrial scale of the fisheries processing industry is very small compared to other food manufacturing industries. The backward linkage effect of the fisheries processing industry was greater than that of other industries, but the forward linkage effect was rather low. This means that the fisheries processing industry can be greatly affected by industrial depression of the downstream industries such as fishery and aquaculture. Production and employment-inducing effects of the fisheries processing industry have shown a decreasing trend in recent years. This reflects the reality that intermediate inputs are gradually being replaced by imports from domestic production due to the expansion of market opening and the depletion of fishery resource. In the future, it is necessary to prepare a strategy to increase the value-added productivity of the fisheries processing sector and foster it as an export industry.

• 대한환경공학회지
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• 제39권8호
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• pp.449-455
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• 2017

기준공정과 개선대상공정 간의 투입물(Input, Material and energy), 배출물(Output, Product, Co-product), 환경오염물(Environmental emission) 데이터를 수집하고 공정 성과를 분석하였다. 이를 통해 환경적으로 주요한 투입물과 환경오염물을 파악하였다. 제조공정의 투입물과 환경오염물 간의 상관관계 분석을 통해 각 환경오염물에 대한 기여도가 큰 투입물을 파악하였다. 주요 환경오염물 처리 시, 경제적 최적화를 통한 종말처리공정 조합을 선형 프로그래밍 기법을 사용하여 규명하였다. 사례 연구로는 동일한 형태의 시멘트를 생산하는 EU와 국내 시멘트 제조공정을 선정하였다. 국내 시멘트 제조공정에서는 석탄이 주요 투입물로, 먼지, $SO_x$가 주요 환경오염물로 파악되었다. 제조공정의 투입물과 환경오염물 간의 다중회귀분석결과 석탄>원자재>석고 순으로 $CO_2$발생량에 기여도가 큰 것으로 나타났다. $SO_x$발생량의 경우 석탄의 기여도가 가장 컸으며, Dust 발생량의 경우 석고>원자재 순으로 기여도가 큰 것으로 나타났다. Dust 종말처리공정 최적화에서 전기집진기술 100%, 섬유필터기술 2.4% 조합이 최적이었다. $SO_x$종말처리공정 최적화에서는 건식첨가공정기술 100% 습식세정기술 25.88% 조합이 최적이었다. 이 연구의 특징은 제조공정에서 문제가 되는 주요 투입물과 환경오염물을 파악하는 방법을 제시하였다는 점이다. 또한, 기술적 경제적으로 최적의 조합인 종말처리공정 선정 방법을 제시하였다는 점이다.

• 산업경영시스템학회지
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• 제38권1호
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• pp.52-64
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• 2015

Korea ocean research stations manage the weather and environmental data collected from coastal and ocean areas to provide short-term and long-term ocean forecasts. The purpose of this paper is to analyze and quantify economic benefits of the ocean research stations with sensors to observe physical, chemical, and biological data. The construction and operation of an integrated ocean observation station is expected to reduce uncertainty about ocean and coastal areas and to improve the quality of ocean forecasts. The economic benefits are mainly come from improved search and rescue operations, ocean pollution management, yellow dust management, and improved productivity in ocean-related industries. In addition, an input-output analysis is performed to evaluate the economic impacts of ocean research stations nationwide. The analysis shows that the system can contribute to industries such as fishing, maritime and air cargo, medical and health care.