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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>
Lee, Kwang‐,Ho,Kim, Sang‐,Mook,Jeong, Huisu,Pak, Yusin,Song, Hui,Park, Jeongpil,Lim, Keon‐,Hee,Kim, Jae‐,Hoon,Kim, Youn Sang,Ko, Heung Cho,Kwon, Il Keun,Jung, Gun‐,Young WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.23
<P><B>All‐solution‐processed transparent thin film transistors (TTFTs)</B> are demonstrated with silver grid source/drain electrodes, which are fabricated by printing and subsequent silver nanoparticles solution coating, which allows continuous processing without using high vacuum systems. The silver grid electrode shows a reasonable transmittance in visible range, moderate electrical conductance and mechanical strength. The TTFTs are employed to drive liquid crystal cells and demonstrate a successful switching operation.</P>
Lee, Young-Jun,Lee, Ji-Bong,Park, Sung Ik,Kim, Heung Mook,Lee, Yong-Tae,Son, Kyung Sik,Kim, Hyoung-Nam IEEE 2012 IEEE transactions on broadcasting Vol.58 No.3
<P>This paper presents a novel correlation canceling-type feedback canceler based on decision-directed pilot symbols for a terrestrial digital multimedia broadcasting (T-DMB) on-channel repeater (OCR). In order to guarantee an additional isolation of the OCR, two types of the feedback cancelers have been investigated: a correlation canceling (CC)-type feedback canceler and a frequency-domain channel estimation (FDCE)-type feedback canceler. While both of the feedback cancelers suppress the feedback signal effectively, they can operate complementarily each other with their own respective advantages. To achieve these complementary properties of the two types of feedback cancelers, we adopt a CC-type feedback canceling structure based on the frequency-domain estimated pilot symbols. The proposed feedback canceler improves the feedback channel estimation accuracy of the conventional CC-type feedback canceler as well as increases the channel estimation speed of the conventional FDCE-type feedback canceler. Simulation results show that the proposed feedback canceler has better feedback canceling performance and tracking ability for dynamic feedback channels.</P>
Lee, Min-Hee,Lee, Kyung-Bok,Oh, Sang-Mook,Lee, Bong-Ho,Chee, Hee-Youn The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.4
Antifungal activities of dieckol from the brown alga Ecklonia cava against Trichophyton rubrum (T. rubrum) were investigated. The minimum inhibitory concentration of dieckol was $200\;{\mu}M$. Fluorescent microscopic observation indicated that dieckol exhibited a fungicidal activity against T. rubrum due to loss of cytoplasmic membrane integrity.