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조류제거(藻類除去)를 위한 염소(鹽素)와 이산화염소처리(二酸化鹽素處理)의 비교연구(比較?究)
유명진,손은주,Yu, Myong Jin,Sohn, Eun Joo 대한토목학회 1987 대한토목학회논문집 Vol.7 No.3
상수처리(上水處理) 과정중 조류(藻類)(Algae)에 의한 장애를 해결하기 위하여 전염소처리(前鹽素處理)가 종종 사용되는데, 이때 염소(鹽素)는 인체(人體)에 유해한 물질을 생성시킨다. 본(本) 연구(硏究)에서는 염소(鹽素)의 대체(代替) 살초제(殺草劑)로 사용가능성을 검토하기 위하여 조류농도(藻類濃度)가 높은 원수(原水)를 염소(鹽素) 및 이산화염소(二酸化鹽素)로 처리할 때 발생하는 THM과 Haloacetonitriles의 생성량을 비교하였다. 시료수에는 Ankistrodesmus가 가장 많았으며 조류농도는 1 ml 당 10,790 cell 정도였다. In water treatment, prechlorination is often carried out to solve the troubles caused by Algae, but produces by-products that are known to be harmfull to human health. In this study, chlorine and chlorine dioxide used for algae removal process were compared in producing trihalomethanes and haloacetonitriles to study the possibilities in using chlorine dioxide as a alternative for chlorine. The raw water used for the study had 10,790 algae cells per one milliliter and Ankistrodesmus sp. were the most common.
Highly soluble polyetheramine functionalized graphene oxide in various solvents
유명진,김효원,유병민,박호범 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
Graphene nanocomposite materials are highly desirable in material sciences due to their extremely enhanced electrical, thermal and mechanical properties in many applications, but the manufacture of graphene nanocomposite materials has been very limited because of the low dispersibility of graphene oxide in organic solvents. In this respect, many studies have been carried out to enhance dispersion properties of graphene oxide (GO) for better processability. Among them, chemical modification to oxygen functional groups of GO is a simple route to improve dispersion properties of GO without causing any contaminations or structure deformations. In this study, we prepared polyetheramine functionalized GO, which was proved to have much enhanced dispersion properties in organic solvents as well as in water. The dispersion properties of GO and functionalized GO were discussed in detail by concentrations, zeta potentials and UV/Vis spectroscopy.
1D 방법에 의한 6MeV 전자선의 output 인자 결정
유명진 한국의학물리학회 2002 의학물리 Vol.13 No.1
6MeV 전자선의 output 인자를 결정하기 위해 간편하게 output 인자를 예측하는 수단인 1D(Dimension) 방법을 이용하였으며 그리고 1D 방법으로 결정된 output 인자를 개별적 beam cutout 하에서 직접 측정한 output 인자와 비교하여 1D 방법의 정확성을 분석하였다. 1D 방법은 정방형 field의 한 변과 항상 동일한 한 변을 갖는 사각형 field의 output 인자로서 규정되며, 임의의 사각형 field (X,Y)의 output은 1D output 인자의 곱으로 주어진다. 6MeV 전자선의 대단히 큰 정방형 field의 output은 1D 방법을 사용하면 실제보다 높은 값을 나타내지만 교정인자 CF=C.[(X-10)(Y-10)/$\mid$(X-10)(Y-10)$\mid^{1/2}]$를 적용하면 개별적 cutout하에 직접 측정된 output 인자와 잘 일치하였으며 그 오차 범위는 1% 이내였다. Output factors for 6MeV electron were directly measured under the condition of an individual beam cutout and these factors were compared with the output factors by 1D method which is an easy means to predict the output factors of electron beam. Output factors by 1D method are defined as output factors of rectangular fields where one side is always equal to the side of the square reference field and the output of an arbitrary rectangular field X, Y is given by the product of the 1D output factors. The output of very large square fields is overestimated using 1D method for the 6MeV electron, but it results in agreement with measured data under the condition of an individual cutout within 1% error adopting a correction factor $CF=C\times$[(X-10)(Y-10)/$\mid$(X-10)(Y-10)$\mid^{1/2}]$.
유명진,김용환,권은미,박창배 서울시립대학교 산업기술연구소 1996 산업기술연구소논문집 Vol.4 No.-
To estimate the removal rates of organic material by GAC and BAC, pilot plant was constructed in D city water treament plant and operated over 16 months period. There are some differences between the removal rates of organic materials (THM, TOC, DOC, BDOC, E-260). The removal rate of BDOC was better in BAC than GAC, but those of the others were same or better in GAC compare to BAC. It seems that BAC was not sufficiently activated because of the low water temperature and the high concentration of combined residual chlorine( 0.08~3.24mg/l )in influent water to the pilot plant. Consequently, the advanced water treatment systems like GAC and BAC are advisable for supply of safe drinking water. However, to obtain best treatment effeciency, AWTS should be arranged suitably with conventional system and managed perfectly.
MgB$_4$O$_{7}$ (Mn) TLD에 의한 $^{60}$ Co 강내 치료 환자의 직장의 흡수선량 평가
유명진,신병철,문창우,정태식,염하용,도시홍 한국의학물리학회 1994 의학물리 Vol.5 No.2
자궁강내 치료시 직장의 흡수선량을 TLD로 직접 측정함으로써 컴퓨터에 의한 계산값과 비교하여 보다 더 정확한 흡수선량을 결정하고자 한다. 마그네슘 보레이트에 Mn을 활성제로 첨가한 MgB$_4$O$_{7}$ (Mn) TLD를 제작하여 기본적인 특성조사를 하였다. 1994년 4월부터 9윌까지 고신의료원 치료방사선과에서 $^{60}$Co 강내치료를 받은 환자 33명을 대상으로 직장의 흡수선량 측정을 하였다. 직장의 흡수선량을 컴퓨터로 계산한 값과 TLD로 측정한 값을 비교한 결과 대부분이 10-59%이내의 차이를 보였다. Tandem과 Ovoid를 같이 사용한 환자보다 Ovoid만 사용한 환자에게 있어서 차이가 적게 나는 것으로 나타났다. By measuring with TLD, absorbed dose of rectum will be determined more accurately than calculated value. MgB$_4$O$\sub$7/(Mn) TLD phosphor was prepared and its characteristic was studied. To measure the absorbed dose of rectum with TLD, 33 patients who had intracavitary treatment with $\^$60/Co from April 1994 to September 1994 at Kosin Medical center. There were 10-59% differecne in most cases between the calculation and the measurement for the absorbed dose of rectum. The difference was less the case with tandem and ovoid than the case with only ovoid.
혼합 방사선장에서 개개의 방사선을 구별하기 위한 MgB_(4)O_(7)(Mn) TLD의 응용
유명진 고신대학교 의학부 1993 高神大學校 醫學部 論文集 Vol.9 No.2
The thermoluminescence of MgB₄O_(7)(Mn) TLD to different types of radiation with various energies have been investigated. Experimental results indicated that the glow curve and its peak height ratios for MgB₄O_(7)(Mn) are clearly correlated with the type of radiation field and can therefore be used for the identification of a particular radiation component. Types of radiation that have been studied in this work include fast electron, X and gamma rays.