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서성규,이병하,Seo, Sung-Gyu,Lee, Byung-Ha 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.6
Uvarovite Garnet is green pigment prepared by using $Cr_2O_3$, CaO and $SiO_2$ which are widely used in ceramic industry. The synthesis of above pigment was carried out by mixing $K_2Cr_2O_7$, $SiO_2$ and $CaCO_3$ as formulated and then firing at $1000{\sim}1200^{\circ}C$. To investigate the optimum synthesis condition of the Uvarovite Garnet. it was prepared by using CaO to replace $CaCO_3$, $CaF_2$ and $CaCl_2$. To get green brighter color, $Al^{3+}$ was substituted for $Cr^{3+}$. They were characterized by X-ray diffraction, UV-Vis spectroscopy, Raman spectroscopy and SEM analysis. When the pigments were applied to lime glazes (6 wt%), color parameters of Uvarovite Garnet showed the $L^*$=40.99, $a^*$=-16.23 and $b^*$=17.04.
서성규(Sungkyu Seo) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
A novel lensfree CMOS image sensor based blood analysis technique using the LUCAS platform is described. Compared to the established clinical instruments, this technique which does not utilize any bulky and expensive optical and mechanical components can perform accurate and high-throughput blood analysis with an error rate of 5% in red blood cell count and 3~5% in hemoglobin concentration measurement and CD4/CD8 count within a simple, cost-effective and compact platform. Given its versatility combined with the wireless telecommunication technology, it holds a great promise in telemedicine and environment monitoring applications especially for the resource limited settings.
서성규 ( Seong-gyu Seo ),윤형선 ( Hyung-sun Yoon ) 한국환경기술학회 2004 한국환경기술학회지 Vol.5 No.2
코발트-프탈로시아닌(Co-PC) 촉매의 열적 특성은 TGA, FTIR 및 XRD분석을 통하여 수행하였으며, VOCs(메탄올, 아세트알데히드)처리에 관한 연구는 상압유통식 반응장치를 이용하여 조사하였다. TGA분석 결과 Co-PC촉매는 450℃에서 약 85.0%의 중량감소를 나타내었으며, 450℃에서 열처리된 촉매는 메탄올과 아세트알데히드 산화반응시 높은 활성을 나타내었다. 450℃에서 열처리된 Co-PC 촉매상에서 메탄올과 아세트알데히드는 각각 320℃와 350℃이상에서 완전산화 되었으며, 열처리온도에 대한 촉매활성은 800℃<600℃<450℃순서로 나타났다. Co-PC촉매는 상업용 Co<sub>3</sub>O<sub>4</sub> 산화물보다 높은 활성을 나타내었으며, FTIR 및 XRD분석결과, 열처리된 Co-PC는 금속산화물인 Co<sub>3</sub>O<sub>4</sub>형태로 존재함을 확인 할 수 있었다. Thermal characteristics of cobalt-phthalocyanine(Co-PC) catalyst have been studied by TGA, FTIR, XRD analysis. The catalytic oxidation of VOCs(methanol, acetaldehyde) has been investigated in a fixed bed flow reactor at atmospheric pressure. TGA thermogram for Co-PC catalyst showed about 85.0% mass loss at 450℃ and the catalyst with heat-treated at 450℃ showed the highest activity for methanol and acetaldehyde oxidation. The complete oxidation of methanol and acetaldehyde over Co-PC catalyst with heat-treated at 450℃ was observed above 320℃ and 350℃ respectively. The catalytic activity with heat-treatment temperatures improved in the order of 800℃<600℃<450℃. The catalytic activity of Co-PC is better than the commercial Co<sub>3</sub>O<sub>4</sub>. FTIR and XRD results showed that Co-PC catalyst with heat-treated at 45 0℃ was destroyed and metal oxide were formed such as Co<sub>3</sub>O<sub>4</sub>. This cobalt metal oxide(Co<sub>3</sub>O<sub>4</sub>) has high catalytic activity on methanol and acetaldehyde oxidation.
서성규 ( Seong-gyu Seo ),정현우 ( Hyun-woo Jeong ),마충곤 ( Zhong-kun Ma ),임은옥 ( Eun-ok Lim ),정상철 ( Sang-chul Jung ) 한국환경기술학회 2011 한국환경기술학회지 Vol.12 No.3
전라남도 여수시의 에너지, 산업공정 부문 온실가스 배출특성을 분석하기 위하여 한국환경공단에서 제공한 지자체 온실가스 배출량 산정지침(2009)에 따라 2000∼2007년까지 에너지, 산업공정부문의 온실가스 배출량을 산정하였다. 또한, 외부인자들의 상관성을 알아보기 위하여 상관분석을 실시하였다. 온실가스 배출량 산정결과, 에너지 부문 및 산업공정 부문이 2007년 총 배출량(23,629 kt CO2eq)의 90.1%를 차지하고 있었다. 기여율을 조사한 결과, 에너지 부문의 경우 2000년 63.7%에서 2007년 57.2%로 감소하였으며, 산업공정 부문은 2000년 28.8%에서 2007년 32.9%로 증가하는 경향을 보였다. 에너지 부문과 산업공정 부문의 세부 항목별 배출량을 분석한 결과, 에너지 부문은 에너지산업과 제조업 및 건설이 총 배출량의 80% 이상을 차지하고 있었으며, 산업공정 부문은 화학산업이 총 배출량의 99% 이상을 차지하고 있었다. 국가와 여수시의 각부문별 온실가스 배출비율을 비교한 결과(2005년 기준) 여수시의 산업공정 부문 온실가스 배출비율이 더 높은 것을 알 수 있었으며, 이는 에너지 다소비형 산업인 석유화학공업 관련 국가산업단지가 위치한 여수시의 온실가스 배출특성을 나타내는 것으로 판단된다. 여수시의 에너지 및 산업공정부문 온실가스 배출량과 주요 영향 인자들과의 상관관계를 분석한 결과 에너지 부문의 주요 상관인자는 산업공정과 여수산단 생산액이었으며, 산업공정 부문의 주요 상관인자는 국내 총 인구와 여수산단 생산액임을 알 수 있었다. In this study, the characteristics of Yeosu`s Greenhouse Gas(GHG) (CO2, CH4, N2O) emissions from energy and IPPU(Industrial Processes and Product Use) sectors from 2000 to 2007 were investigated. The methodology as "Guidelines for Local Governments Greenhouse Gas Inventories 2009" was provided from "Korea Environment Corporation (Environmental Management Corporation)". In addition, correlation analyses were performed in order to determine if there was any discernible statistical relationship among the main impact-factors. The energy sector and IPPU sector are the two largest sources of GHG emissions in Yeosu, accounting for 90.1% of total GHG emissions(23,629 kt CO2eq) from all emissions sectors. In 2000, the ratio of GHG emissions from energy sector was 63.7% while 57.2% in 2007, have reduced during this 7 years. In the case of IPPU sectors, the ratio of GHG emissions was 28.8% in 2000 while 32.9% in 2007, have risen during this 7 years. Over 80% of GHG emissions were generated from energy industries(EI) and manufacturing industries and construction(MIC) in energy sector. Meanwhile, about 99% of GHG emissions were generated from chemical industry in IPPU sector. Comparing the GHG emission proprtions in Korea and Yeosu by each sector, we can find that the GHG emission proprtions from IPPU sector in Yeosu is higher than that in Korea. That was due to the characteristics of petrochemical industry in Yeosu. The results of correlation analysis showed the main impact-factors of energy sector were IPPU sector and production output in Yeosu Industrial Complex while the main impact-factors of IPPU sector were total population in Korea and production output in Yeosu Industrial Complex.