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최찬영 ( Chan-yung Choi ),강전희 ( Jun-hee Kang ),이용우 ( Yong-woo Lee ),김형선 ( Hyung-sun Kim ),김치수 ( Chi-su Kim ),김황래 ( Hwang-rae Kim ),공헌택 ( Heon-taek Kong ),임재현 ( Jae-hyun Lim ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.1
현재 스케줄러는 입력해 놓은 스케줄 시간에 대한 알람 서비스를 해주지만, 알람 서비스만으로는 약속 시간, 약속 장소로 이동해야하는 스케줄 관리를 위해서는 부족하다. 본 시스템은 최근에 주목 받고 있는 매쉬업 기술을 이용한 지능형 스케줄러를 구현하였다. 날씨 정보와 교통 정보를 이용하여 해당 장소까지의 교통 정보와 해당 위치의 날씨 등을 스케줄에 추가해 새로운 서비스를 제공해준다.
Enhancement of mass transport in fuel cells using three-dimensional graphene foam as flow field
Park, Ji Eun,Lim, Jongkoo,Kim, Sungjun,Choi, Insoo,Ahn, Chi-Yeong,Hwang, Wonchan,Lim, Myung Su,Cho, Yong-Hun,Sung, Yung-Eun Elsevier 2018 ELECTROCHIMICA ACTA Vol.265 No.-
<P><B>Abstract</B></P> <P>Graphene foam is a three-dimensional graphene-based material with interconnected macropores and it combines the advantage of graphene and structural characteristics of metal foam. Various kinds of metal foam have been developed as flow fields because their high porosity distributes reactants in an entire area and removes generated water. However, metal foam is highly susceptible to corrosion under the operating conditions of polymer-electrolyte-membrane fuel cells. In this work, we proposed using graphene foam as a flow field to investigate its effect on enhancing mass transport of reactants and products. Single-cell tests of the graphene-foam flow field showed the enhancement of mass transport, which led to increased performance at high current densities. Measurements of the oxygen gain (i.e., the difference in voltage under O<SUB>2</SUB> and air atmospheres), electrochemical impedance spectra, and simulation results also revealed that the graphene-foam membrane-electrode assembly (MEA) exhibited lower mass-transport resistance than a conventional MEA because graphene foam is advantageous for the mass transport of reactants and water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A graphene foam MEA using graphene foam as flow field is proposed. </LI> <LI> The graphene foam MEA exhibits high cell performance, especially at high current densities. </LI> <LI> The graphene foam as flow field can decrease mass transport resistance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
이의연,Shi-Young Park,최재선,Chi-Won Lim,Yeon-Kye Kim,Hee-Yeon Park,Yung-Jin Kim 대한암예방학회 2008 Journal of cancer prevention Vol.13 No.1
Angiogenesis is an integral process in the growth and spread of solid tumors, and anti-angiogenesis therapy is one of the most promising therapeutic strategies for the treatment of cancer. In this study, we show that a natural marine compound extracted from ark shell, Scapharca subcrenata, has anti-angiogenic activities. Ark shell extract inhibited the proliferation, migration, invasion and tube formation of human umbilical vein endothelial cells (HUVECs), and suppressed the release of matrix metalloproteinase-2 (MMP-2) by HUVECs. In addition, ark shell extract also inhibited in vivo angiogenesis in a mouse Matrigel-plug assay. Taken together, these results suggest that ark shell extract acts as a novel angiogenesis inhibitor and could be further developed as an anticancer agent. (Cancer Prev Res 13, 47-53, 2008)
김영석(Young-Seok Kim),박치현(Chi-Hyun Park),임용배(Yung-Bae Lim),배석명(Seok-Myung Bae) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.11월
In this paper, survey and analysis of real conditions about domestic and foreign online electricity facility construction example for additional service about electricity safety were executed. According to survey, in Japan, they are executing online electricity facility monitoring service based on IT basic law for information society construction and not only electricity safety but also value added service such as alarm for earthquake, security are being done. In USA, using power line communication(PLC), online observation and building district management service were being realized. Observing domestic case, electricity safety related service such as distribution panel product incorporating load management and leakage current measurement was being executed in some companies.
김희경 ( Hee Kyung Kim ),반희정 ( Hee Jung Ban ),지수영 ( Su Young Chi ),채동렬 ( Dong Ryeol Chae ),조계중 ( Gye Jung Cho ),임정환 ( Jung Hwan Lim ),주진영 ( Jin Yung Ju ),권용수 ( Yong Soo Kwon ),오인재 ( In Jae Oh ),김규식 ( Kyu 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.64 No.2
A sarcoidosis is a multisystemic granulomatous disorder that has a predilection for pulmonary involvement, and the common radiological findings for the disease are bilateral nodular or reticulonodular patterns. Pseudoalveolar sarcoidosis is a rare presentation of sarcoidosis. The radiological finding is an alveolar pattern that involves or compresses the alveoli by clustered interstitial granuloma. A 58-year-old man was admitted due to incidental findings of a unilateral consolidative lesion as seen on chest radiography. A chest computed tomography (CT) examination showed multiple bronchoalveolar consolidations that were suspicious of a malignancy. However, a percutaneous needle biopsy revealed non-caseating granuloma with an asteroid body that was compatible with sarcoidosis. After one month, the consolidative lesions improved without any treatment. (Tuberc Respir Dis 2008;64:149-152)
High-performance anion-exchange membrane water electrolysis
Park, Ji Eun,Kang, Sun Young,Oh, Seung-Hyeon,Kim, Jong Kwan,Lim, Myung Su,Ahn, Chi-Yeong,Cho, Yong-Hun,Sung, Yung-Eun Elsevier 2019 ELECTROCHIMICA ACTA Vol.295 No.-
<P><B>Abstract</B></P> <P>In this study, we developed high-performance anion-exchange membrane water electrolysis (AEMWE) by investigating various parameters. To enhance AEMWE performance, the effects of the membrane-electrode assembly (MEA) fabrication method, operating conditions, and MEA parameters were examined. As a result of the optimization and the use of FAA-3-50 and FAA-3-Br as the AEM and anion-exchange ionomer, respectively, AEMWE showed the highest performance reported thus far. Single-cell tests and electrochemical impedance spectroscopy results indicate that optimized AEMWE minimized the ohmic, charge-transfer, and mass transport resistances. Overall, by examining the AEMWE parameters, we were able to improve the electrochemical reactions, namely, the oxygen evolution reaction and hydrogen evolution reaction, and achieved outstanding performance.</P>