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공기질 관리에 관한 환경 비용편익 연구 [동해항만 주변 미세먼지오염을 기준]
김은주 ( Eun Joo Kim ),이춘길 ( Choon Gil Lee ),김지현 ( Ji Hyun Kim ),박영구 ( Young Koo Park ) 한국유화학회 2012 한국응용과학기술학회지 Vol.29 No.4
본 연구는 강원도 소재 동해항만에서 발생하는 미세먼지 관리를 위한 환경비용편익을 산출하는 것이다. 항구 인근에 부유하는 미세먼지의 농도는 매우 높은 편이며, 지점에 따라 국가 기준인 100 μg/m3 이상으로 관측되는 곳도 있다. 시험대상 항구는 주로 석회석과 석탄을 취급함으로써 미세입자상 물질이 하역시다량 발생한다. 연구결과 PM10을 기준으로 년간 12톤의 미세먼지가 하역작업 시 발생하는 것으로 밝혀졌다. 덧붙여서 원료물질을 비롯한 다양한 화물을 운송하는 대형차량 및 중장비는 디젤 검댕이를 발생하고, 도로먼지의 비산을 유발한다. 지방정부는 해마다 20억원 이상의 비용을 투자하여 대기중 미세먼지를 제거하고 있다. 편익대비 비용을 산출한 결과 그 효과는 최소 240%에서 최대 720%까지 얻을 수 있는 것으로 나타났다. Study attempts to evaluate the environmental cost and benefit for management ofparticulate matters of Donghae harbor in Gangwondo. The level of fine dust suspended in thevicinity of the harbor was quite high, exceeding the national standard (100 μg / m3) depending on the places. The test field harbor deals with lots of limestone and coal, so that fine particulates could be generated while loading it and unloading. It was estimated that the direct handling of cargos might produce 12 tons of PM10 (Particulate Matters of 10 um) a year. In addition, heavy vehicles for transportation of various cargos including raw materials emit huge amount of diesel soots and cause to redispersion of road dust. The local government spends more than 2 billion won every year, and it contributes to reduce the atmospheric dust. According to the prediction of cost to benefit, it will present the effectiveness in 720 % maximum and at least 240 %.
스판덱스 코어 나일론 커버링 two way 복합사 직물의 전단특성
李春吉 慶一大學校 2002 論文集 Vol.18 No.-
The two way fabrics woven by spandex-core nylon-covering complex yarn play a decisive role in producing the high quality textile garments. The fabrics used in this experiments, woven by polyurethane 40 denier core filament and nylon 140 denier/ 48 filaments covering yarn, were wet and dry heat treated two way fabrics. We performed the experiments to know the influence of treatment time and temperature on the shear properties of the two way fabrics. In wet treatment, the samples were made by using the two way fabric at boiling temperature through the treatment time of 2, 4, 6, 8, 10 min. respectively. In dry treatment, the samples were made at the temperature of 100, 120, 140, 160℃ for 2, 6, 10, 20 min. respectively. The shear properties of the samples were evaluated by using Kawabata Hand Evaluation System. Through the experiments the following results were obtained. The shear stiffness of the wet treated samples increased according to the treatment time and the shear stiffness of the dry treated samples decreased at the treatment temperature of 160℃ according to the treatment time. The hysteresis of shear force at the shear angle φ=0.5° of the wet treated samples decreased and the hysteresis of shear force at the shear angle φ=0.5° of the dry treated samples decreased at the treatment temperature of 160℃ according to the treatment time. The hysteresis of shear force at the shear angle φ=5°of the wet treated samples had almost the same values but the hysteresis of shear force at the shear angle φ=5°of the dry treated samples decreased over the treatment temperature of 120℃ according to treatment time.
30 Denier Monofilament로 제작한 폴리에스테르 Sheer 직물의 구속 이축신장
李春吉,신국철 경일대학교 2001 論文集 Vol.17 No.-
The sheer fabrics used in printing industry play a decisive role in producing the high quality textile goods. The materials used in this research were the polyester sheer fabrics woven by 30 denier monofilament yarns. Through the constraint biaxial extension for the sheer fabrics, the properties of horizontal shrinkage were investigated. Horizontal shrinkage ratio increased according to the added weight but the ratio decreased according to the basic weight. The effect of dry heat treatment on the horizontal shrinkage ratio also investigated experimentally. The polyester monofilament fabrics which had been heat treated had more lower horizontal shrinkage ratios than those of untreated fabrics. One of the important factors to affect the ratio was the number of mesh of the fabrics. The higher the number of mesh the lower the horizontal shrinkage ratio.