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김건위(Kun-Wee Kim) 한국정책분석평가학회 2005 政策分析評價學會報 Vol.15 No.1
This study could find the general appliability of DEA to the relative efficiency measurement of local government informatization. This study sould more effectively measure the relative. efficiency of local government information with DEA. More specially, DEA model could include multiple non-commensurable. inputs and outputs simultaneously,. and without any preliminary weights. Also this. study showed that the managerial information drawn from DEA - reference groups, amount of inefficiency in each input and output - were very useful In other words, the strength of DEA. is that it can enhance the validity of measurement and provide useful managerial information. Because many other. services local government provide are similar to information project of local government in term of output characteristics - multiple and l1on-commensurable outputsmore researches utilizing DEA should be done in the future to measure relative efficiency of local government informatization.
김건하 ( Geon Ha Kim ) 한국물환경학회 2005 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2005 No.-
The pathogens originating from diffuse pollution have raised much concern recently. In many countries, pathogen levels are monitored in surface water by measuring the pathogen indicator organism level, which indicates the concentration of pathogen associated microorganisms to determine contamination. Among indicator organisms, total coliform, fecal coliform, and Escherichia coli were selected for study, and their concentration as well as their flow rate were monitored at monitoring stations from October, 2001 to April, 2003. Monitoring stations include six sampling stations in the Geum River, two small watersheds used for forestry and agricultural land, one large wastewater treatment plant, oneseparate sewer overflow site, and one separate sewer overflow site in the Geum River basin. The coliform concentration of the combined sewer overflow was the highest, followed by the runoff from agricultural land use, the separate sewer overflow, and the runoff from forestry land use. The Pearson correlation coefficient for flow rate against total coliform concentration was 0.71 and was significant at 0.01 level, while the Pearson coefficient for other water quality constituents showed weak correlation (-0.36 +0.37) against flow rate. Coliform concentration showed higher correlation against suspend solid concentration or flow rate during storm flow condition than during low flow condition. Two different relationship lines could explain the relationships between the flow rate and coliform loadings. Load duration curve technique was presented to assess the relative contributions of diffuse and point source pollution to the pathogen level at monitoring sites in the Geum River.
바나듐 함유 MFI 형 제올라이트의 제조 및 촉매적 특성
김건중,고완석,조병린 ( Geon Joong Kim,Wan Suk Ko,Byung Rin Cho ) 한국공업화학회 1994 공업화학 Vol.5 No.2
수열합성법 및 탈알루미늄 처리 이후 NH_4VO_3 담지법으로 바나듐이 함유된 MFI헝 제올라이트를 제조하였다. X선 회절분석, 시차 열분석, 적외선 분광분석 및 전자스핀공명분석을 수행하여 바나듐의 격자구조 내로의 도입을 검토하였다. 탈알루미늄된 ZSM-5에 NH_4VO_3를 담지시키고 소성한 경우에도 수열합성법으로 제조한 시료와 같이 바나듐이 구조 내로 도입될 수 있었다. 제올라이트 구조 중의 바나듐은 고온처리에 의해 산화-환원과정을 거칠 수 있으며, 이들은 원자단위로 분산되어 고정됨을 나타내었다. 벤젠 수산화반응과 hexane 및 알코올의 산화반응을 바나듐 함유 MFI형 제올라이트의 특성검토를 위한 시험반응으로 이용하였다. Vanadium containing MFI type zeolites have been prepared hydrothermally or by the impregnation method with NH_4VO_3 solution after dealumination of HZSM-5. Incorporation of vanadium into the framework of zeolite has been demonstrated by XRD, DTA, FT-IR and ESR analyses. Upon NH_4VO_3 impregnation and calcination of dealuminated zeolite, vanadium substitution into the framework could be performed like a hydrothermally synthesized zeolite. Vanadium in zeolite is able to pass redox cycles at high temperatures, and it is shown that vanadium is probably fixed and atomically dispersed in the structure of zeolite. The catalytic benzene hydroxylation, hexanes and alcohols oxidation were used for evaluating the properties of vanadium incorporated MFI zeolite.