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상전환 공정 이중구조막의 형상에 있어 침지용 비용매가 미치는 영향
이근우,서범경,임난주,한명진 한국공업화학회 2003 응용화학 Vol.7 No.1
Polusulfone scintillation proximity membranes of a double-layered structure wereprerared with Cerium Activated Yttrium Silicate (CAYS) impregnated in a membranestructure. Using the prepared membranes, the radioactivity of an area contamintedby radionuclids can be monitored without any scintillation cocktail The membranewere fromed through two separate casting and coagulation processes. The transparentand dense support layer was obtained by solidifying a polysulfone-methylene chloridebinary solution through vacuum. CAYS-dispersed polymer solutions were cast over the top of solidified, transparent polymer films and coagulated by immersing into acoagulation bath, containing either water or isopropanol. The prepared membranesconsist of double layers. The bottom laver is a dense. pure polymer film. and thetop works as an active layer to detect a radioactive contamination .The membrane structures are significantly different depending on the nonsolvent type.
강용태,송근관 영남대학교 환경문제연구소 2000 環境硏究 Vol.19 No.2
This study was conducted to improve raw and clean water quality using biofilter at the down stream of Nakdong River. The removal efficiency of turbidity, color, KMnO4 consumption, NH4-N and UV254 was 98.5%, 95.6%, 65.2%, 87.2%, 77.1% respectively with biofilter as pre-treatment process. The new advanced water treatment system using biofilter composed with biofiltration, post-ozonation and GAC process without clarifier and rapid sandfilter. The removal efficiency of the new system using biofilter for turbidity, color, color, KMnO4 consumption, NH4-N and UV254 was reached 98.9%, 98.6%, 77.7%, 92.3%, 91.5% respectively. It is equivalent to the removal efficiency of existing advanced water treatment system using pre-ozonation, coagulation, flocculation, clarifier, rapid sandfilter and BAC though the demanded area and coagulant of the new advanced water treatment system using biofilter was decreased about 60% and 70% respectively.
여재 특성에 따른 생물막여과 공법의 처리특성에 관한 연구
강용태,양희천,송근관,권혁원 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2
In the biofilteration process, the removal of turbidity, color, KMnO₄consumpion, NH₄^(+)-N and UV254 reached 98%, 95%, 70%, 85%, 79% respectively. The stable removal efficiency was obtained by the direct filteration after coagulant dosage, though the influent was muddy and highly polluted. The exhausted GAC was used as the media of biofilter, which obtained stable removal efficiency compared with the other medias such as GAC, ZEOCARBON. Effluent of sorptived THMs was not found after 45 days during filter run time. And the case of dual media filteration was prior to single media filteration in the headloss development and quality of effluent. In the case of the ozone dosage rate was determined the color of biofilteration in the AAWTS system. 1㎎/L ozone dosage was proper when the color was below 8 unit.
Preparation of a Polysulfone Composite for Alpha Radiation Detection
LEE, Kune Woo,SEO, Bum Kyoung,HAN, Myeong Jin Atomic Energy Society of Japan 2010 Journal of nuclear science and technology Vol.47 No.1
<P>A polymer composite for alpha radiation detection was prepared by coating a ZnS(Ag) scintillator over a polysulfone (PSF) base layer. The base layer and active ZnS(Ag) layer were formed by the evaporation of a solvent from the solution films of a binary solution of PSF and methylene chloride (MC), and a ternary scintillator paste of PSF, ZnS(Ag), and dimethylformamide (DMF), respectively. Since the scintillator paste was screen-printed without any extra binder on the surface of a solidified base layer, PSF works as a transparent and mechanical support layer as well as a binder for ZnS(Ag) coating, while maintaining the monolithic feature of the composite. The prepared composite was pliable and flexible enough to be rolled up like paper. The alpha detection of the composite was efficient enough to determine the activity of alpha radiation.</P>
Young Kune Lee,Woo Tae Kim 위기관리 이론과 실천 2023 Crisisonomy Vol.19 No.2
국가핵심기반을 구성하는 제도가 도입되고 20년간 국가기반체계와 국가기반시설 등 다양한 입법이 진행되었다. 그리고 이를 기반으로 보다 정교한 법적 토대가 구축되었다. 그러나 현 국가핵심기반 정의규 정이 어느 정도의 법적인 완결성을 가지고 있는지에 대해서는 의문의 여지가 있으며, 기존 국가기반시설 등의 용어와 비교하여 실제 동 제도의 운용면에서 개정목적을 어느 정도 달성하였는지 혹은 달성할 수 있는지 살펴보는 일은 매우 중요하다. 국가핵심기반을 구축하기 위한 입법과정에서 행정안전위원회 혹은 법사위에서 제도 자체의 법적 성격이나 기능 등에 논의가 거의 진행되지 않고 단순히 입법 그 자체를 목적으로 이루어졌기 때문이다. 본 연구는 국가핵심기반 제도의 도입과정에서 나타난 제도기반 의 목적을 고찰함으로서 현재 우리나라 국가핵심기반 제도 운용의 문제점 및 한계, 그리고 개선방안을 도출하는 것을 목적으로 한다. Over the past two decades since the National Core Infrastructure legislation was introduced, substantial progress has been made in various related legislations, such as those governing Critical Infrastructure and National Infrastructure, leading to the development of a more refined legal framework. However, there are still uncertainties regarding the extent of legal completeness embodied in the current definition of National Core Infrastructure. Evaluating how well the objectives of these legislative revisions have been or can be achieved, especially in comparison to existing terms like National Infrastructure, is crucial. This necessity stems from the fact that the legislative process for the National Core Infrastructure was carried out with no discussions on its legal nature or functions at key committees like the Administrative Security Committee or the Legal Affairs and Judiciary Committee. This study aims to scrutinize the objectives underlying the establishment of the National Core Infrastructure Act and identify challenges, limitations, and potential improvements in the current operation of South Korea's National Core Infrastructure legal system.