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Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19
<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>
Choi, Kyu-Bong,Woo, Sung Yun,Kang, Won-Mook,Lee, Soochang,Kim, Chul-Heung,Bae, Jong-Ho,Lim, Suhwan,Lee, Jong-Ho Frontiers Media S.A. 2018 Frontiers in neuroscience Vol.12 No.-
<P>Hardware-based spiking neural networks (SNNs) to mimic biological neurons have been reported. However, conventional neuron circuits in SNNs have a large area and high power consumption. In this work, a split-gate floating-body positive feedback (PF) device with a charge trapping capability is proposed as a new neuron device that imitates the integrate-and-fire function. Because of the PF characteristic, the subthreshold swing (<I>SS</I>) of the device is less than 0.04 mV/dec. The super-steep <I>SS</I> of the device leads to a low energy consumption of ∼0.25 pJ/spike for a neuron circuit (PF neuron) with the PF device, which is ∼100 times smaller than that of a conventional neuron circuit. The charge storage properties of the device mimic the integrate function of biological neurons without a large membrane capacitor, reducing the PF neuron area by about 17 times compared to that of a conventional neuron. We demonstrate the successful operation of a dense multiple PF neuron system with reset and lateral inhibition using a common self-controller in a neuron layer through simulation. With the multiple PF neuron system and the synapse array, on-line unsupervised pattern learning and recognition are successfully performed to demonstrate the feasibility of our PF device in a neural network.</P>
Combined Cis-platinum and Alpha Interferon Therapy of Advanced Hepatocellular Carcinoma
( Sang Keun Ji ),( Neung Hwa Park ),( Hyun Mook Choi ),( Young Woo Kim ),( Sin Hwa Lee ),( Keum Hee Lee ),( Su Yul Ahn ),( Sang Uk Lee ),( Byung Hoon Han ),( Byung Chae Park ) 대한내과학회 1996 The Korean Journal of Internal Medicine Vol.11 No.1
Sung Hyup Hyun(현성협),Seung Mook Choi(최승묵) 한양대학교 관광연구소 2011 觀光硏究論叢 Vol.23 No.2
이 연구의 목적은 호텔산업에서 (1) 고객과 기업의 첫 교감, (2) 고객의 헌신적 행위, 그리고 (3) 잠재 매개변수들 사이의 구조적 인과관계를 고찰하는 것이다. 문헌분석에 근거하여, 고객 첫 교감과 헌신적 행위 형성간의 이론적 인과관계가 제안되었으며, 이 과정에서 세 개의 매개 변수들이 제시되었다. 문헌분석 과정에서, 제시된 변수들 간의 조절효과를 제시하는 세 개의 이론적 변수들 또한 도출되었다: (1) 고객과 기업의 첫 교감 시점과 현재의 시간차, (2) 호텔 고객의 성별, (3) 기업에 대한 친밀도. 제시된 이론적 가설들을 종합하여 구조모델이 탄생하였으며, 이 구조모델은 219명의 호텔고객들로부터 수거된 데이터로 검증되었다. 데이터 분석결과에 의하면, 고객과 기업의 긍정적인 첫 교감은 브랜드 이미지를 구축하는데 필수불가결한 요소이며, 따라서 재방문 동기를 유발하는데 큰 영향을 준다는 것이 밝혀졌다. 또한, 긍정적인 호텔 이미지는 고객의 지각된 가치를 높임으로써, 고객의 헌신적 행위를 이끌어낼 수 있다는 것이 밝혀졌다. 데이터 분석결과를 바탕으로 하여, 효과적인 호텔경영을 위한 실무적 시사점들이 논의되었다. The purpose of this study was to investigate the structural relationships among first interaction, commitment formation, and possible mediators. Based on a thorough literature review, the theoretical relationships between first interaction and guests` commitment was proposed. In addition, key mediators between the two constructs were proposed. During this process, three key moderators (hiatus, gender, and familiarity) were proposed. Integrating the theoretical relationships, a structural model was tested, using the data selected from 219 actual hotel guests. Results from the structural analysis revealed that first interaction with guests plays a critical role in creating brand image, thus helping to induce guest revisit motivation. Findings also revealed that positive brand image enhances the hotel customers` perceived value that leads to commitment. Theoretical/practical implications for hotel researchers and practitioners were discussed.
Sung, Jin-Ho,Back, Seung-Ki,Jeong, Bup-Mook,Kim, Jeong-Hun,Choi, Hang Seok,Jang, Ha-Na,Seo, Yong-Chil Elsevier 2018 Fuel processing technology Vol.172 No.-
<P><B>Abstract</B></P> <P>Oxy-fuel co-combustion of waste sludge and biomass with flue gas recirculation was conducted to observe the combustion characteristics and enrichment of CO<SUB>2</SUB> using a 30kWth circulating fluidized bed. The combustion reaction was accelerated and the ignition time was shortened by increasing the blending ratio of wood pellets and oxygen mixing ratio. The best combustion performance was observed at a 30% blended biomass ratio, with 23% oxygen mixing rate as oxy co-combustion with respect to heat recovery and enrichment of CO<SUB>2</SUB>; this study included experiments with ranges of 0 to 70% for the blending ratio and 21 to 30% for the oxygen mixing ratio. With flue gas recirculation at 60%, the oxy-fuel co-combustion of sludge with biomass was optimized in high enrichment of CO<SUB>2</SUB> (over 90%) with less pollutant emissions, specifically 0.91% CO and 14ppm NO.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Oxy-fuel co-combustion of waste sludge and biomass was conducted using a CFB reactor. </LI> <LI> Oxy-fuel combustion characteristics were investigated with respect to fuel mixing and FGR rate. </LI> <LI> Oxy-fuel co-combustion was optimized to show maximum CO<SUB>2</SUB> concentration and less pollutant emissions. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Choi Sung-Mook(최성묵) 새한영어영문학회 2010 새한영어영문학 Vol.52 No.3
Despite the role of different accents of English and the contribution of academic listening, virtually no previous studies examined the developmental contour of academic listening skills and the effect of accent for advanced Korean EFL high school students. Accordingly, quantitative comparisons were made on the relationship between accent, presentation mode (spoken vs. written), and grade level. Two major findings were identified. First, in contrast to previous research findings, the advanced EFL participants were rarely affected by different accents of English regardless of their grade level, indicating that language proficiency is an important variable in interpreting the effect of accent. Second, academic listening skills of advanced EFL learners did not improve as much as their academic reading skills. The findings of the study have a direct bearing on EFL academic discourse comprehension and pedagogy.
The Sources of Conventional and Unconventional Political Participation: The Case of South Korea
( Sang Mook Lee ),( Jang Sup Choi ) 한국세계지역학회 2006 世界地域硏究論叢 Vol.24 No.2
The purpose of this study is to investigate the modes of political participation and examine the sources of political participation in South Korea in the individual level. While previous studies have only focused on either conventional or unconventional political participation and are somewhat limited to industrial countries, this study deals with both types of political participation simultaneously and tests the findings derived from previous studies mainly based on industrial countries in the Korean contexts. For important sources of (un)conventional political participation, this study found that both political efficacy and partisanship are important factors in explaining not only conventional, but also unconventional political participation in Korea.
Differential Reading Ability Development of Two Korean ESL Children
Choi Sung-Mook(최성묵) 새한영어영문학회 2006 새한영어영문학 Vol.48 No.3
Via four month long classroom observations and extensive interviews with two American classrooms teachers and two Korean 4th graders, the present study portrayed factors that may contribute to two Korean ESL learners' reading development. Major findings include that (a) reading instructions of the American teachers were not tailored to meet the needs of the Korean students, and that (b) the dominant Discourse (Gee, 1990) interfered with the Korean ESL children's interactions and co-construction of meanings, (c) reading instructions for the Korean children tended to focus on low level reading skills at the expense of meaning construction, and that (d) parental involvement may be an alternative for rich interaction and co-construction of meaning. Practical implications are drawn for parents and mainstream classroom teachers of Korean ESL children.