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Jeon, Wooyoung,Kim, Yeu-Chun,Hong, Minhee,Rejinold, Sanoj,Park, Kyoungmoon,Yoon, Injoong,Yoo, Sungsik,Lee, Hongweon,Ahn, Jungoh Hindawi 2018 BioMed research international Vol.2018 No.-
<P>The study describes the development of a vaccine using microcrystalline cellulose (Avicel PH-101) as a delivery carrier of recombinant protein-based antigen against erysipelas. Recombinant SpaA, surface protective protein, from a gram-positive pathogen<I> Erysipelothrix rhusiopathiae</I> was fused to a cellulose-binding domain (CBD) from<I> Trichoderma harzianum</I> endoglucanase II through a S3N10 peptide. The fusion protein (CBD-SpaA) was expressed in<I> Escherichia coli</I> and was subsequently bound to Avicel PH-101. The antigenicity of CBD-SpaA bound to the Avicel was evaluated by enzyme-linked immunosorbent (ELISA) and confocal laser scanning microscope (CLSM) assays. For the examination of its immunogenicity, groups of mice were immunized with different constructs (soluble CBD-SpaA, Avicel coated with CBD-SpaA, whole bacterin of<I> E. rhusiopathiae</I> (positive control), and PBS (negative control)). In two weeks after immunization, mice were challenged with 1x10<SUP>7</SUP> CFU of<I> E. rhusiopathiae</I> and Avicel coated with CBD-SpaA induced protective immunity in mice. In conclusion, this study demonstrates the feasibility of microcrystalline cellulose as the delivery system of recombinant protein subunit vaccine against<I> E. rhusiopathiae </I>infection in mice.</P>
Explicit Static Circuit Model of Coupled Magnetic Resonance System
Jin Huh,Wooyoung Lee,Suyong Choi,Gyu-Hyeong Cho,Chun-Taek Rim 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
An explicit frequency-domain circuit model for the conventional coupled magnetic resonance system (CMRS) is newly proposed in this paper. Detail circuit parameters such as leakage inductances, magnetizing inductances, turn-ratios, internal coil resistances, and source/load resistances are explicitly included in the model. Accurate overall system efficiency, DC gain, and key design parameters are deduced from the model all in closed form equations, which were not available in previous works. It is found that the CMRS can be simply described by an equivalent voltage source, resistances, and ideal transformers when it is resonated to a specified frequency in the steady state. It is identified that the voltage gain of the CMRS is saturated to a specific value though the source side or the load side coils are strongly coupled. The analysis results of the proposed model are verified by simulations and experiments with good agreement.
Hongjae Moon,Jeong Min Kim,Dong Won Chun,Seokkyoon Hong,Young Soo Yoon,Wooyoung Lee 한국물리학회 2020 Current Applied Physics Vol.20 No.1
The thermoelectric transport properties of Bi/Sn and Bi/Sb core/shell (C/S) nanowires grown by the method of on-film formation of nanowires were systematically investigated. The electrical conductivity and Seebeck coefficient of nanowires with different diameters were measured as a function of the temperature. The contribution of Sn and Sb shells to the total transport in the C/S nanowires was determined using analytical fitting based on the parallel combination of the conductive system model. The carrier-interface boundary scattering at the C/S interface was quantitatively evaluated as the sheet resistance. In addition, the effect of hole doping on the transport properties was also observed in the Bi/Sn C/S nanowires.
CRF 를 이용한 한국어 동화 텍스트의 제스처 태그 연구
이유정(Yujung Lee),한다민(Da-min Han),천우영(Wooyoung Chun),김규민(Gyumin Kim),구명완(Myoung-Wan Koo) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2
본 연구는 3D 아바타를 통한 한국어 동화구연 서비스 개발을 위하여 동화 텍스트의 주요 어절에 알맞은 제스처 태깅(Gesture tagging)을 목적으로 수행되었다. 제스처(Gesture)는 동화 텍스트에 필수적인 92 가지의 제스처로 선정하고, 다섯 종류로 분류하였다. 이에 기초하여 3D 아바타를 통해 해당 제스처를 구현하는 동화 구연 서비스를 제작하였다. 본 논문은 한국어 동화텍스트의 주요 어절에 알맞은 제스처를 태깅하는 머신러닝 모델을 중심으로 요약한 것이다. 동화 텍스트에서 제스처 선정과 분류 기법을 소개하고 이를 바탕으로 수행된 머신 러닝 결과에 대해서 서술한다. 머신 러닝모델은 CRF(conditional random field) 기반으로 Python 을 이용하였다. 향후 본 논문에서 제시한 제스처 설계 방법론 및 실험 설계 방법을 이용하여 인간 컴퓨터 상호작용 기술(HCI)로 적용시킬 수 있을 것이다.
Strain-engineered allotrope-like bismuth nanowires for enhanced thermoelectric performance
Kim, Jeongmin,Oh, Min-Wook,Kim, Gwansik,Bahk, Je-Hyeong,Song, Jae Yong,Jeon, Seong Gi,Chun, Dong Won,Bae, Jee-Hwan,Shim, Wooyoung,Lee, Wooyoung Elsevier 2018 Acta materialia Vol.144 No.-
<P><B>Abstract</B></P> <P>Allotropy is a fundamental concept that has been frequently studied since the mid-1800s. Although the bulk allotropy of elemental solids is fairly well understood, it remains challenging to reliably produce an allotrope at the nanoscale that has a different crystal structure and accompanies a change in physical properties for specific applications. Here, we demonstrate a 'heterostructure' approach to produce allotrope-like bismuth nanowires, where it utilizes the lattice constant difference between bismuth and tellurium in core/shell structure. We find that the resultant strain of [100]-grown Bi nanowires increases the atomic linear density along the c-axis that has been predicted from theoretical considerations, enabling us to establish a design rule for strain-induced allotropic transformation. With our >400-nm-diameter nanowires, we measure a thermoelectric figure of merit ZT of 0.5 at room temperature with reduced thermal conductivity and enhanced Seebeck coefficient, which are primarily a result of the rough interface and the reduced band overlap according to our density-functional calculations.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>