http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
JXTA 플랫폼 기반 분산 정보 검색 시스템 설계 및 구현에 관한 연구
이승하 ( Seungha Lee ),방세중 ( Sechung Pang ),이필우 ( Pilwoo Lee ),김양우 ( Yangwoo Kim ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.1
일반적인 정보검색 시스템은 중앙 집중식의 서버/클라이언트 방식을 사용한다. 이 방식은 서버 집중방식으로 시스템의 부하가 가중될 경우 추가적인 자원 확보에 어려움을 가진다. P2P(Peer-to-Peer) 기술은 이러한 중앙 서버의 문제점을 해결하기 위해 제안된 것이다. JXTA 플랫폼은 P2P 서비스를 제공하기 위한 오픈 소스 프로젝트로서 본 논문은 정보검색 시스템의 부하가 늘어날 경우 유연한 자원 확보를 위해 JXTA 플랫폼 기반의 JXIR(Jxta Information Retrieval) 시스템을 설계하고 구현하였다.
Woo, Kyoungmin,Kang, Wonkyu,Lee, Kyungmin,Lee, Pilwoo,Kim, Yoonjae,Yoon, Tae-Sik,Cho, Chu-Young,Park, Kyung-Ho,Ha, Min-Woo,Lee, Hyun Ho Elsevier 2020 Biosensors & bioelectronics Vol.159 No.-
<P><B>Abstract</B></P> <P>In this study, high electron mobility transistor (HEMT) device was used as an immuno biosensor to measure concentration of a stress hormone, cortisol, by using selective binding on cortisol monoclonal antibody (c-Mab). Also, the HEMT sensor was enhanced in its sensitivity through light illumination to generate photocurrent. The optical pumping could assist the biosensor to discriminate more detailed change, which could result in an increment of limit of detection (LOD) to 1.0 pM cortisol level. It was the lowest level of detection with semiconductor device-based cortisol biosensors and the enhancement of surface potential sensitivity was induced by laser light (532 nm). Output current amplificated by photocurrent was higher than dark original current at about 3.39% when gate voltage is applied with −3 V. Since the device could be applied to not only standard cortisol solution but also real human salivary sample, it is expected to apply for <I>in vitro</I> direct diagnosis of point-of-care test (POCT).</P> <P><B>Highlights</B></P> <P> <UL> <LI> High electron mobility transistor (HEMT) sensor was demonstrated for a direct cortisol measurement using c-Mab immune-detection. </LI> <LI> The HEMT sensor could measure 1.0 pM levels of cortisol standard solution and in human salivary sample. </LI> <LI> Detection efficiency of cortisol was enhanced by optical pumping of AlGaN/GaN layer through laser illumination. </LI> </UL> </P>
Jung, Hunsang,Jung, Jihee,Kwon, Dahye,Lee, Kyungmin,Lee, Pilwoo,Kang, Wonkyu,Yoon, Tae-Sik,Kang, Chi Jung,Lee, Hyun Ho Elsevier 2019 Journal of industrial and engineering chemistry Vol.78 No.-
<P><B>Abstract</B></P> <P>In this study, a resistive switching (RS) memory characteristic of zinc oxide (ZnO) nanoparticles (NPs) multiple layer through a neurotransmitter and its corresponding antibody’s specific binding was demonstrated in Al/ZnO NPs/ITO device format. Particularly, a layer-by-layer (LbL) assembly was enabled through a specific immune binding between a stress hormone, cortisol, and its fittable cortisol monoclonal antibody (c-Mab). The assembly formation was accomplished using sequential LbL deposition, which could accomplish alternating self-assembly monolayers (SAMs) of ZnO NPs as the RS active layer. Here, the current–voltage (I–V) curve exhibited disparate nonvolatile RS characteristics depending on sweep polarity showing consecutively evolved hysteresis. In this study, analog-typed RS function of the ZnO NPs LbL device was demonstrated and characterized.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Polypeptide-Mediated Switchable Microarray of Bacteria
Lee, Jonghwan,Jung, Jaeyeon,Na, Kyunga,Heo, Pilwoo,Hyun, Jinho American Chemical Society 2009 ACS APPLIED MATERIALS & INTERFACES Vol.1 No.7
<P>This paper describes a feasible solution for the bacterial cell death and contamination from cell division that occurs in microfluidic applications. The method adopts a smart thermoresponsive surface, highly resolved micropatterns, and surface-functionalized bacteria tagged with thermoresponsive molecules. We developed a method for controllable bacterial attachment and detachment using an elastin-like polypeptide (ELP). To create a smart surface with switchable properties, the surface of a glass substrate was conjugated with thermoresponsive ELP molecules. The attachment of bacterial cells to the ELP surface was induced by the hydrophobic affinity of the ELPs on the glass surface to tagged ELPs on the bacterial surface. A cell-repellent polymer was micropatterned to create a highly resolved space for specific bacterial adhesion. Reversible bacterial attachment and detachment was achieved by controlling the thermoresponsive phase transition of ELP molecules. Five different types of bacteria were successfully conjugated with ELPs and arrayed on the surface. The viability of the bacteria that had attached to the surface was evaluated by determining colony forming units of released bacteria on an agar plate.</P>