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장기 대기오염확산모형의 국내적용을 위한 기상결합빈도함수의 풍속등급 수정에 관한 연구
張榮基 수원대학교 산업기술연구소 1990 산업기술연구소논문집 Vol.5 No.-
Many long-term air pollution models have been used in KOREA. But these models were developed in U. S. A., and some parameters do not reflect the climatological characteristics of KOREA. This paper analize the frequency of wind speed in Seoul, and modify the wind speed class in climatological joint frequency function (JFF) to make it applicable in Seoul, and modify TCM-2 program for new JFF. Then conventional JFF and modified JFF are compared by TCM-2. it was found that the correlation coefficient by conventional JFF is 0.519 and that of modified JFF is 0.523. And difference between observed value and predicted value by modified JFF is reduced to 4.3㎍/㎥ as compared with 36.0㎍/㎥ by conventional JFF.
수도권지역의 대기질 현황과 변화추세(1989-1995)
장영기 수원대학교 산업기술연구소 1996 산업기술연구소논문집 Vol.11 No.-
The air quality levels and annual trends were analyzed in Seoul and 10 cities of Gyongky area for recent years(1989-1995). The annual trends and characteristics of SO₂, TSP, NO₂, CO, O₃in these cities were compared. In this area the concentrations of SO₂, TSP were improved, but the degree of improvement of Gyongky area less than that of Seoul. And the annual trends of SO₂, NO₂ emission were investigated. The SO₂emission was decreased in Seoul, but emission in Gyongky area was increased in same period. And the level of NO₂, O₃was increased, specially O₃level was sharply increased in this area. The number of violation for ambient O₃quality standard was increased. Ozone alert system was promulgated in Seoul from 1995. And this results indicates that ozone alert system is needed in Gyongky area immedately.
장영기 崇實大學校 生産技術硏究所 1992 論文集 Vol.22 No.-
The term of factory automation is used extensively to indicate manufacturing methods which range from processing products with automated machine to automated integration of management and manufacturing activities through whole factory, progressing level by level supported by the development of technology(hardware). After formalizing the level of factory automation a survey on Korean manufacturing industries and its investigation were performed. Since other surveys had been done already the survey was designed to avoid overlap, rather to attach importance to production management and organizational changes. Some suggestions to accelerate the factory automation are proposed for both government and individual enterprise.
장영기 수원대학교 산업기술연구소 2003 산업기술연구소논문집 Vol.18 No.-
The methane is one of the major greenhouse gases with carbon dioxide and nitrous oxide. The major sources of methane are waste landfill, agriculture, animal feed operation and fugitive emission of energy sector The fugitive methane emission is made from coal mining, natural gas system and oil production and transportation. In this study, the methane emission from fugitive sources is estimated during from 1991 to 2002 in Korea. The emission factors are selected from the revised 1996, 2000 IPCC guidelines considering Korean characteristics of coal, gas and oil production and transport system. The fugitive methane emitted mainly from coal underground mining in early 1990s. But the methane emission is rapidly decreased from 260 Gg in 1991 to 57 Gg in 2002 by reduction of coal production. Meanwhile the methane from natural gas system is gradually increased from 9 Gg in 1991 to 55 Gg in 2002 by the natural gas utilization. It is estimated that the methane emitted as 128 Gg by fugitive emission in 2002; 57 Gg from coal production, 55 Gg from natural gas system and 16 Gg from oil transportation.