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Nam-Yeal Lee,Byoung-Gon Yu,In-Kyu You,Kwang-Ho Kim,Kwi-Dong Kim,Sang-Ouk Ryu,Seong-Mok Cho,Soon Won Jung,윤성민,Woong-Chul Shin 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.51
The switching characteristics of sol-gel derived ferroelectric (Bi,La)4Ti3O12 (BLT) thin lm capacitors were investigated for nonvolatile ferroelectric random access memory (FeRAM) and onetransistor- type metal-ferroelectric-insulator-semiconductor eld eect transistor (MFIS-FET) applications. We could eectively modulate the electrical properties of the BLT thin lms by controlling their crystallographic orientations, which could be performed by changing RTA temperature conditions during the rst annealing process. We characterized the ferroelectric switching properties of the prepared BLT lms and obtained the important parameters describing their switching characteristics by using a double-pulse method. The results for switching time (ts) of the BLT lms with preferred c-axis orientations and (117) orientations were measured to be in the range from 108 ns to 220 ns and from 60 ns to 89 ns at applied voltages from 8 V to 5 V, respectively; the capacitor size was 200 200 m2. The ferroelectric switching event of c-axis-oriented BLT may be said to nish in a shorter time than that of (117)-oriented BLT. On the other hand, the dimensionality factors (n) of both BLT lms were observed to be in the range of about 1.9 2.1, regardless of the capacitor size and BLT orientation.
이소열 ( So Yeal Lee ),고남영 ( Nam Young Goh ),이보형 ( Bo Hyung Lee ) 전북대학교 농업과학기술연구소 2011 농업생명과학연구 Vol.42 No.1
The objectives of this study is to propose efficient approach for filler stability of armor stone against the wave. The wave time series using by long-term estimated wave (KORDI) is applied to the wave condition. It is estimated an annual behavior probability for armor stone filler which is applied by fluid particle velocity induced wave propagation and formula of the USACE based on formula of Isbash. Behavior of armor stone filler available in January and December is at the largest probability, and the lower slope was higher than in the other sections. Previous studies regarding the specific wave conditions were calculated on the safe armor stone filler weight. In this study, using the wave time series of specific rubble of the annual behavior of the weight can be estimated by quantitative probabilities. Beginning with this study, more various formulas or hydraulic experiments on the stability of rubble mound dike with a high degree of long-term results should be drawn.
이기남,이정호,송용선,정재열,김삼태,임진아,이인아,유형원,장용남,이택준,김홍기,천현자,유일수,김종수,백승화,Lee, Ki-Nam,Lee, Jeong-Ho,Song, Yong-Sun,Jeong, Jae-Yeal,Kim, Sam-Tae,Lim, Jin-A,Lee, In-A,Ryu, Hyeong-Won,Jang, Yong-Nam,Lee, Taek-Jun,Kim, 대한예방한의학회 2003 대한예방한의학회지 Vol.7 No.1
This study was carried out to evaluate cytotoxic effects of Houttuynia cordata $T_{HUNB}$ extracts on A549(lung cancer), B16(mouse melanoma), MDA-MB231(breast cancer) and SNU-C4(colon cancer) cell lines. We have determined by 3-(4, 5-dimethylthiazol-2-Yl)-2, 5-diphenyl-2H-tetrazoliumbromide(MTT) assay. The $150{\mu}g/ml$ concentration of chloroform extract of Houttuynia cordata $T_{HUNB}$ was shown significantly antitoxic activity on MDA-MB231$(65.96{\pm}5.68%)$ and SNU-C4$(55.94{\pm}7.39%)$ cell lines.
이준재,남재열 啓明大學校 産業技術硏究所 1996 産業技術硏究所 論文報告集 Vol.19 No.1
A reliable algorithm for singular points of fingerprint image using directional information is proposed in this paper. The suggested method first finds the directional image and extracts several candidate singular points using Poincare index. The directional smoothing over those points is performed recursively and the singular points are finally extracted. In addition, an effective scheme which can segment fingerprint image into a foreground image and a background image is proposed. The proposed method can be used as preprocessing process in order to improve both the operational speed and the system performance.
High-Throughput Screening (HTS) of Anticancer Drug Efficacy on a Micropillar/Microwell Chip Platform
Lee, Dong Woo,Choi, Yeon-Sook,Seo, Yun Jee,Lee, Moo-Yeal,Jeon, Sang Youl,Ku, Bosung,Kim, Sangjin,Yi, Sang Hyun,Nam, Do-Hyun American Chemical Society 2014 ANALYTICAL CHEMISTRY - Vol.86 No.1
<P>Contemporary cancer therapy refers to treatment based on genetic abnormalities found in patient’s tumor. However, this approach is faced with numerous challenges, including tumor heterogeneity and molecular evolution, insufficient tumor samples available along with genetic information linking to clinical outcomes, lack of therapeutic drugs containing pharmacogenomic information, and technical limitations of rapid drug efficacy tests with insufficient quantities of primary cancer cells from patients. To address these problems and improve clinical outcomes of current personalized gene-targeted cancer therapy, we have developed a micropillar/microwell chip platform, which is ideally suited for encapsulating primary cancer cells in nanoscale spots of hydrogels on the chip, generating efficacy data with various drugs, eventually allowing for a comparison of the in vitro data obtained from the chip with clinical data as well as gene expression data. As a proof of concept in this study, we have encapsulated a U251 brain cancer cell line and three primary brain cancer cells from patients (448T, 464T, and 775T) in 30 nL droplets of alginate and then tested the therapeutic efficacy of 24 anticancer drugs by measuring their dose responses. As a result, the IC<SUB>50</SUB> values of 24 anticancer drugs obtained from the brain cancer cells clearly showed patient cell-specific efficacy, some of which were well-correlated with their oncogene overexpression (c-Met and FGFR1) as well as the in vivo previous results of the mouse xenograft model with the three primary brain cancer cells.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2014/ancham.2014.86.issue-1/ac402546b/production/images/medium/ac-2013-02546b_0010.gif'></P>