• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2000.05a
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• pp.53-54
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• 2000

• Proceedings of the Korea Society of Environmental Biology Conference
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• 1994.05a
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• pp.42-43
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• 1994

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1992.10a
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• pp.40-44
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• 1992

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2003.04a
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• pp.204-209
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• 2003

• 정보화사회
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• s.116
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• pp.18-20
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• 1997

텔레워크의 선두에 있는 미국에서는 교통정체의 해소, 대기오염의 방지, 지역 경제진흥, 재해대책등 관점에서, 각지에 공설 새틀라이트 오피스를 설립하는 등 텔레워크에 관한 행정적 접근도 활발하다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2016.10a
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• pp.415-416
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• 2016

• Clean Technology
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• v.7 no.2
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• pp.89-97
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• 2001

The purpose of this study was to find the optimum condition of the high removal efficiency of water pollutant as sewage treatment technology using a filtering bed charged with porous sintering-pellet which was planted with hydrophytes. Experiment was carried out by changing concentration of water pollutants(COD, T-N, T-P), kind of hydrophyte, kinds of filtering material and size, and HRT. The result of removal efficiency was obtained as following: COD removal 73.8~87.1% for input concentration range of 50~450mg/L, T-N removal 61.3~77.3% for input concentration range of 7~124mg/L, T-P removal 89.5~99.1% for input concentration ranger of 3~27mg/L. In a comparative experiment of three kinds of hydrophyte(Iris pseudoacorus, Phragmites communis $T_{RIN}$., Oenanthe javanica Dc.), the best removal efficiency of COD and T-N was gained with Iris pse-udoacorus, and Phragmites communis $T_{RIN}$ showed better result than two hydrophytes for the removal efficiency of T-P. In a comparative experiment of four kinds of filtering-materials, the removal efficiencies were in the order of porous sintering-pellet, gravel, nonused-tire and nonused-concrete. It was found that for the porous sintering-pellet, the smaller its diameter, the better its result. In the filtering bed in which was charged with porous sintering-pellets of 5mm diameter and planted with Iris pseudoacorus, the removal efficiency of COD, T-N and T-P were over 80%, 70% and 90% under the concentration of COD 250mg/L, T-N 70mg/L and T-P 15mg/L for 24hrs treatment. Thus, we concluded that a filtering bed charged with porous sintering-pellet and planted with hydrophytes will be suitable for treatment of sewage water as a pro-natural treatment technology.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.09a
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• pp.249-253
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• 2003

강서구를 제외한 부산 전지역에서 1998년도에 조사된 지하수 수질 중 6개 성분(pH, TS, KMnO$_4$, Cl, SO$_4$, NO$_3$-N)에 대한 일반통계분석 결과 pH 성분을 제외하고는 5개 성분의 중앙값이 평균보다 적은 값을 보이는 양성왜도를 보임으로써, 수질오염정도를 분석하기 위해 지시크리깅이라는 비모수적인 지구통계분석기법을 적용하였다. 6개 수질성분에 대해 음용수 기준치를 적용하여 음용가능은 “1”의 값이, 음용불가능은 “0”의 값이 주어졌다. 이렇게 변환된 자료를 이용하여 각 성분별로 실험적인 베리오그램 분석을 실시한 결과 pH, TS, SO$_4$ 성분은 선형모델이 선정되었으며, KMnO$_4$, Cl, NO$_3$-N 성분은 구상형모델이 선정되었다. 본 연구에서는 지시크리깅을 이용하여 6개 성분의 분포도를 작성하고 부산지역의 오염정도를 분석하였다. 지시크리깅기법은 연구지역 전체의 정량적인 분포를 나타내지는 못하지만, 오염의 유.무와 오염의 크기를 정확하게 파악할 수 있으며 또한, 이상치(outlier)가 크게 영향을 미칠 수 있는 통계학적인 오류를 보완할 수 있다.

• The Journal of Engineering Geology
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• v.25 no.4
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• pp.577-585
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• 2015

Contamination of soil due to an oil spill influences its subsequent behavior. An investigation was conducted to study the effect of oil viscosity on compaction characteristics, coefficient of permeability, and shear strength. Water permeability was also determined by using Kerosene, Engine oil, and Crude-oil as contaminants. The test results indicate that the compaction characteristics are influenced by oil contamination. Direct shear test was conducted to investigate the effect of oil in the pore space in sandy ground. angle of internal friction of sand (based on total stress condition) decreases due to presence of oil within the pore spaces in sand.

• Membrane Journal
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• v.12 no.4
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• pp.216-225
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• 2002

Experimental study on the crossflow electro-microfi1tation of simulated oil emulsion waste water was carried out with polypropylene microfiltration membrane to evaluate the applicability of electrofiltration process in the treatment of oily waste water generated from many industries including nuclear field. The effects of electric field strength transmembrane pressure, crossflow velocity, and oil emulsion concentration on the permeate flux were investigated. In electro-microfiltration process using the external electric field, significant enhancement of permeate flux was achieved by diminishing membrane fouling and it was shown that considerable permeate flux can be maintained for long-term operation compared with conventional membrane filtration process without an electric field.