• Korean Journal of Environmental Agriculture
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• v.4 no.1
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• pp.52-56
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• 1985

This study was undertaken to investigate the crop yield of pear and rice cultivated around Onsan Industrial complex, the sulfur content in their leaves, and the crop loss. The correlation between them is as follows: 1) The sulfur content in pear and rice leaves in studied area is higher than that in unpolluted area, and there is crop loss in studied area. 2) There is a good correlation between sulfur content and crop loss of pear and rice. The air pollution in studied area is considered to be the reason of the crop loss. 3) The regression equation between the sulfur content in crop leaves and the crop loss seems to be useful for the crop loss rate by sulfur dioxide in the damaged area and that seems to be a good reference for the compensation of pear and rice loss by sulfur dioxide gas emission from Onsan Industral Complex.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.153-166
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• 2017

Recently, the construction industry has been pursuing economical construction by introducing improved construction equipment and methods. However, in many cases, the equipment operation according to the intuition of the field manager and in the manner of traditional methods impedes the increase in effectiveness in terms of productivity and economy. The performance of new construction equipment has rapidly improved; however, the maximum effect of mechanized construction cannot be obtained unless the effective management and operation methods are implemented. According to the expert survey, it has been discovered that the problems of conventional construction equipment operation methods can be classified into several categories: allocation of construction equipment that is not suitable for the construction work, the combination of equipment that does not take into consideration real-time field situations, the decline in the skill of the construction equipment drivers, and lack of real-time access to necessary information. This paper proposes a construction equipment management system to solve these problems. The construction equipment management system can provide a method to maximize the work rate of the construction equipment fleet by developing an equipment allocation plan based on field conditions, whenever necessary, and transferring this information to the construction equipment drivers in real time. Ultimately, it is believed that the application of the construction equipment operation system in the field will make it possible to reduce carbon emissions by improving productivity and reducing fuel consumption.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.11 no.6
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• pp.49-59
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• 2012

Recently, various alternatives for safety and efficiency of commercial vehicles have been considered, and one of the new alternatives is the application of a digital tachograph. In Korea, the installation of a digital tachograph to commercial vehicles was regulated from 2011 and Korea Transportation Safety Authority developed e-TAS to analyze the monitoring data from digital tachographs installed in the order of 100 commercial vehicles. This study performs the potential impact analysis of the DTG installation, which includes a trend of dangerous driving, a trend of traffic accidents and cost-effective analysis, a trend of fuel consumption and cost-effective analysis, a cost-effective analysis of social benefits using e-TAS data. Depending on the frequency of dangerous driving, the participants are divided into three groups; high-dangerous group, average-dangerous group and low-dangerous group. The high-dangerous driving group shows lower km/liter than the low-dangerous driving group by 15% for buses and taxis and by 30% for trucks. About $CO_2$ emission, the difference becomes bigger; 25%, 25% and 42% for buses, taxis and trucks, respectively. Although this study is a short-term period analysis, the methodology will be applicable for the long-term period analysis with larger data.

• Journal of the Korean Chemical Society
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• v.64 no.6
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• pp.327-333
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• 2020

Performance of a portable GC that can be utilized for the real time determination of volatile organic compounds in air was evaluated. It employs purified/compressed ambient air as the carrier gas eliminating the need for high pressure gas tanks. The compact system with dimensions of 35 × 26 × 15 ㎤ and weight of 5 kg is powered by either a 24 V DC external adapter or battery pack. Chromatograms of the mixture sample including benzene, toluene, ethylbenzene, and oxylene at concentrations of 1 ppmv and 20 ppmv represent a good reproducibility: 3.79% and 0.48% relative standard deviations (RSDs) for peak area variations; 0.40% and 0.08% RSDs for retention times. The method detection limit was 0.09 ppmv. A 30 m long, 0.28 mm I.D. column operated at an optimal condition yielded a peak capacity of 61 with good resolution for a 10 min isothermal analysis. The relative standard deviations (RSD) of the peak area variations and retention times during consecutive measurements over 27 h were less than 2.4%RSD and 0.5%RSD, respectively. Thus, this instrument makes it suitable for continuous and field analysis of low-concentration VOC mixtures in the indoor/outdoor environment as well as the spillage accident of hazardous chemicals.

• Journal of the Korean Society of Urban Environment
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• v.18 no.4
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• pp.531-546
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• 2018

Air quality forecasting system with Asian dust emissions was developed in East Asia, and $PM_{10}$ forecasting performance of chemical transport model with Asian dust emissions was validated and evaluated. The chemical transport model (CTM) with Asian dust emission was found to supplement $PM_{10}$ concentrations that had been under-estimated in China regions and improved statistics for performance of CTM, although the model were overestimated during some periods in China. In Korea, the prediction model adequately simulated inflow of Asian dust events on February 22~24 and March 16~17, but the model is found to be overestimated during no Asian dust event periods on April. However, the model supplemented $PM_{10}$ concentrations, which was underestimated in most regions in Korea and the statistics for performance of the models were improved. The $PM_{10}$ forecasting performance of air quality forecasting model with Asian dust emissions tends to improve POD (Probability of Detection) compared to basic model without Asian dust emissions, but A (Accuracy) has shown similar or decreased, and FAR (False Alarms) have increased during 2017.Therefore, the developed air quality forecasting model with Asian dust emission was not proposed as a representative $PM_{10}$ forecast model in South Korea.

• International Area Studies Review
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• v.22 no.4
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• pp.209-227
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• 2018

The issue of climate change, which calls for urgent and improved action by countries around the world, requires cooperation from the international community. Therefore, consistency among various policies on climate change is particularly important. This study analyzes the relationship between the implementation of SDGs and the scale of assistance in the field of climate change in order to see if there is consistency between domestic policy and aid policy to address climate change issues. An analysis of the correlation between the indices related to the domestic implementation of SDGs and ODA amounts in the field of climate change by OECD countries was conducted. As a result, there is a significant negative correlation between imported CO2 emissions and the portion of climate change ODA. On the other hand, the amount of CO2 emissions embodied in fossil fuel export is significantly positively correlated with the portion of ODA for climate change. Consistency between domestic and aid policies of OECD countries in the field of climate change is not sufficiently ensured, and climate change, the cross-cutting issue, is not being pursued in a consistent direction across national policy.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2008.11a
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• pp.134-138
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• 2008

본 연구는 경기도내 악취관리지역으로 지정된 시화국가산업단지, 반월국가산업단지, 반월도금지방산업단지, 아산국가산업단지(포승지구) 4개 공단에 대하여 2006년과 2007년에 실시한 악취실태조사 자료를 이용하여 각 공단별 악취특성을 조사하였다. 또한, 측정된 자료를 통계분석 기법을 사용하여 복합악취와 지정악취물질간의 상관관계를 연구하였으며 그 결과는 다음과 같다. 1. 시화공단과 반월도금공단에서는 비교적 NH$_3$와 Styrene이 높고 반월공단에서는 H$_2$S가 다른 공단에 비해 약 5배 정도 높은 평균농도를 보였으며 포승공단은 일반적인 배출형태와 크게 다르지 않았다. 2. SAS를 이용한 통계분석 결과 시화공단의 복합악취는 H$_2$S, TMA, Styrene, nvAldehyde와의 관련성이 높고 반월공단은 H$_2$S, aAldehyde, bAldehyde, 반월도금공단은 NH$_3$의 관련성이 높은 것으로 조사되었다.

• Proceedings of the Safety Management and Science Conference
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• 2010.04a
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• pp.347-357
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• 2010

본 논문은 QFD(Quality Function Development)기법을 활용하여 소비자의 요구사항을 반영한 음식물 처리기의 핵심 품질 요소를 도출하는데 목적을 두었다. 일반 소비자와 관련업계 종사자를 대상으로 설문조사와 FGI를 실시하여 VOC(voice of customer)를 도출하였고, 전문가 그룹을 통해 EC를 도출하여 VOC와 EC(Engineering Characteristic)간의 상관관계를 도표화 하여 HOQ(House Of Quality)를 작성하였다. HOQ 차트를 통해 분쇄건조식 음식물 처리기에 있어 우선시 되는 것은 음식물 분쇄기능, 건조기능 외에 냄새 배출기능, 외관 색상 등의 요소가 중요한 품질요인이라는 결과을 도출하였다. 부품별 요인으로는 분쇄 탈수와 관련 된 모터와 냄새 제거와 관련한 팬모터가 가장 핵심 부품으로 고려되어야 한다는 결과를 도출하였다.

• Information and Communications Magazine
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• v.30 no.7
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• pp.58-62
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• 2013

최근에 ICT 기반의 융합 서비스 분야로 인구 밀집지역인 메가 시티에서의 교통, 전력, 상/하수도, u-헬스, 안전/보안등의 문제들을 근본적으로 해결하기 위하여 ICT기반 개방형 플랫폼을 이용한 서비스 인프라 구축 및 개선을 위한 연구들이 많이 진행되고 있다. 이러한 ICT 기반의 융합 인프라 구축 서비스들은 M2M(Machine to Machine)과 D2D(Device to Device)를 기본 연결 수단으로 사용하고 있으며, 이들을 기반으로 서비스 정보 전달 및 제어 정보를 실시간으로 처리하기 위한 IP 기반의 플랫폼이 지원되어야만 융합 서비스가 지속적으로 제공 가능할 것이다. 이들 융합서비스 중에서 전력과 관련하여 한국의 스마트그리드 사업은 기후 변화 대응을 위하여CO2 배출을 줄이고, 에너지 효율을 향상하여 새로운 비즈니스 모델을 만들어 일자리와 신산업을 창출하기 위한 국가 프로젝트로 진행되었다. 그러나, 현재의 전력관련 국내 상황을 살펴보면 여름철과 겨울철에 반복적인 전력 수급 불안으로 인해 피크 전력에 대한 예비력이 부족하여 국가적인 재난인 블랙 아웃의 위기를 걱정하고 있는 실정이다. 본고에서는 한국의 스마트그리드 제주실증단지 사업과 관련하여 현황 및 개선 사항들을 알아보고, 향후 거점지구와 국가 단위의 서비스 확장을 위하여ICT 기반의 개방형 인프라 플랫폼 기술의 중요성을 강조하고자 한다. 이러한 M2M과 D2D를 기반으로 하는 융합 서비스의 성공적인 수행은ICT 기반의 개방형 플랫폼의 우선적인 개발이 필요하며, 플랫폼 기반의 디바이스 보급과 네트워크의 구축이 진행되어야 지속 가능한 융합 서비스를 제공할 수 있을 것이다.

• Journal of Institute of Control, Robotics and Systems
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• v.16 no.1
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• pp.12-17
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• 2010

The oil tanker ship over 150GRT must equip oil content meter which satisfy requirements of revised MARPOL 73/78. Online measurement of oil content in complex samples is required to have fast response, continuous measurement, and satisfaction of ${\pm}10ppm$ or ${\pm}10%$ error in this field. The research of this paper is to develop oil content measurement system using analysis of light transmission and scattering among turbidity measurement methods. Light transmission and scattering are analytical methods commonly used in instrumentation for online turbidity measurement of oil in water. Gasoline is experimented as a sample and the oil content approximately ranged from 14ppm to 600ppm. TSK Fuzzy Model may be suitable to associate variously derived spectral signals with specific content of oil having various interfering factors. Proposed Parallel TSK Fuzzy Model is reasonably used to classify oil content in comparison with other models. Those measurement methods would be effectively applied and commercialized to oil content meter that is key components of oil discharge monitoring control equipment.