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Signed-DLMS 적응 알고리즘 이용한 무선 중계 간섭 제거기
유태훈(Tae-Hoon Yoo),우대호(Dae-Ho Woo),김주완(Dae-Ho Woo),하성희(Sung-Hee Ha),반지훈(Ji-Hun Van),이종현(Jong-Hyun Lee) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7
In this paper, we study the signed- DLMS adaptive algorithm of wireless repeater for solving shadow region due to propagation between base station and mobile station. The the signed-DLMS algorithm reduces interference signals from multipath and solves the oscillation problem of repeater by estimation and cancellation. To efficiently reject interference signal. the signed-DLMS adaptive algorithm is applied. The computational complexities of the signed-DLMS are reduced verse standard LMS algorithm. Wireless ICS repeater based on signed-DLMS reduces the cost and is able to increase channel capacities.
Sung Min Bae,Hyun Na Koo,Tae Young Shin,Jae Bang Choi,Jae Young Choi,Kwang Sik Lee,Jong Yul Roh,Yeon Ho Je,Byung Rae Jin,Sung Sik Yoo,Jae Su Kim,Young In Kim,In Joong Yoon,Soo Dong Woo 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.10
The Classical Swine Fever Virus (CSFV) is a member of the Pestivirus genus of the Flaviviridae. The genome of CSFV is a positive single-stranded RNA molecule 12.3 kb and contains a single large open reading frame (ORF). The polyprotein composed of eight nonstructural and four structural proteins (nucleocapsid protein C and three envelope glycoprotein E0, E1 and E2). E2, the most immunogenic of the CSFV glycoproteins, induces a protective immune response in swine. To determine the characteristics of the CSFV, LOM strain, we investigated the nucleotide sequence of the glycoprotein E0, E1 and E2. Comparison of the LOM with the other strains revealed nucleotide sequence identity ranging from 97 to 98%. Expression of the glycoprotein E2 was identified by SDS-PAGE and Western blot analysis using anti-CSFV E2 monoclonal antibodies in Sf21 cells. The expression levels of glycoprotein E2 were observed from day 3 and 5 days maximum. In addition, its expression efficiency by media and cell line was investigated. The result showed that High-Five cells and Grace’s insect media for Sf21 were the best conditions for the expression of the glycoprotein E2.
Pt<sub>3</sub>Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells
Yoo, Sung Jong,Lee, Kug-Seung,Hwang, Seung Jun,Cho, Yong-Hun,Kim, Soo-Kil,Yun, Jeong Woo,Sung, Yung-Eun,Lim, Tae-Hoon Elsevier 2012 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Vol.37 No.12
<P><B>Abstract</B></P><P>We report here that significant electrocatalysis occurs during oxygen reduction reaction (ORR) at the Pt<SUB>3</SUB>Y alloy thin film electrodes. In addition, we synthesized Pt<SUB>3</SUB>Y alloy nanocatalysts for use in proton exchange membrane fuel cells, fabricated by using a high pressure sputtering technique in a gaseous mixture of Ar and He. Rather than the dense film deposited by conventional sputtering techniques, the resulting structure was comprised of a Pt<SUB>3</SUB> Y alloy nanocatalyst layer with an average particle size of 10–12 nm. The Pt<SUB>3</SUB>Y alloy nanocatalysts were characterized by scanning electron microscopy, transmission electron microscopy, high-resolution X-ray photoelectron spectroscopy, and X-ray absorption near edge spectroscopy. The cell performance of the membrane electrode assembly with multiple layers of sputter-deposited Pt<SUB>3</SUB>Y alloy nanoparticles and spray-deposited Nafion–carbon-ink improved dramatically compared to that obtained with the Pt only nanoparticles. The high performance of Pt<SUB>3</SUB>Y alloy nanocatalysts fabricated at a sputtering pressure of 200 mTorr (Ar/He = 1) was due to miniaturization of the Pt<SUB>3</SUB>Y alloy particles, formation of the porous catalyst layer, and enhancement of the kinetic activity for ORR.</P> <P><B>Highlights</B></P><P>► Significant electrocatalysis occurs during ORR at the Pt<SUB>3</SUB>Y alloy electrodes. ► The activity of the ORR is related to the d-band structures of the Pt<SUB>3</SUB>Y catalysts. ► Pt<SUB>3</SUB>Y nanocatalysts were synthesized by using a high pressure sputtering technique. ► The fuel cell performance of Pt<SUB>3</SUB>Y alloy nanocatalysts was improved dramatically.</P>
The Side-Chain Effects on Photovoltaic Properties of Copolymers Based on Phenothiazine and Thiophene
Yoo, Han Sol,Yun, Dae Hee,Ko, Tae Won,Park, Yong Sung,Woo, Je Wan Trans Tech Publications, Ltd. 2013 Advanced materials research Vol.634 No.-
<P>In this study, the alternating conductive polymers based on phenothiazine and bithiophene unit, poly[(N-10-dodecyl-phenothiazin-3,7-ylene)-alt-(2,2’-bithiophen-5-yl)] (P1) and poly[(N-10- dodecyl-phenothiazin-3,7-ylene)-alt-(4,4’-didodecyl-2,2’-bithiophen-5-yl)] (P2), were synthesized by Suzuki coupling reaction in the presence of palladium catalyst. The structures of synthesized compounds were confirmed by 1H NMR. The optical, electrochemical properties of synthesized polymers were investigated by UV-Vis, cyclic voltammetry (CV). The optical band gap of 2.22 eV and 2.50 eV was obtained from absorption onset of UV-Vis spectrum. Then, the two devices using blends of the polymer, as a donor, and PC71BM, as an acceptor, were fabricated by spin-coating. The device with a P1:PC71BM (1:4, w/w) as an active layer exhibited the best performance with an open circuit voltage (VOC) of 0.68 V, short circuit current (JSC) of 3.5 mA/cm2, fill factor (FF) of 31.8 % and power conversion efficiency (PCE) of 0.74 %.</P>