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에지 영역 보상을 이용한 원격 센싱된 인공위성 화상의 대역간 벡터양자화
반성원(Seong Won Ban),김영춘(Young Choon Kim),이건일(Kyhn Il Lee) 한국센서학회 1999 센서학회지 Vol.8 No.2
In this paper, we propose interband vector quantization of remotely sensed satellite image using edge region compensation. This method classifies each pixel vector considering spectral reflection characteristics of satellite image data. For each class, we perform classified intraband VQ and classified interband VQ to remove intraband and interband redundancies, respectively. In edge region case, edge region is compensated using class information of neighboring blocks and gray value of quantized reference band. Then we perform classsified interband VQ to remove interband redundancy using compensated class information, effectively. Experiments on remotely sensed satellite image show that coding efficiency of the proposed method is better than that of the conventional method.
Naik, Ravi,Ban, Hyun Seung,Jang, Kyusic,Kim, Inhyub,Xu, Xuezhen,Harmalkar, Dipesh,Shin, Seong-Ah,Kim, Minkyoung,Kim, Bo-Kyung,Park, Jaehyung,Ku, Bonsu,Oh, Sujin,Won, Misun,Lee, Kyeong American Chemical Society 2017 Journal of medicinal chemistry Vol.60 No.20
<P>Previously, we reported a hypoxia-inducible factor (HIF)-1 inhibitor LW6 containing an (aryloxyacetylamino)benzoic acid moiety inhibits malate dehydrogenase 2 (MDH2) using a chemical biology approach. Structure–activity relationship studies on a series of (aryloxyacetylamino)benzoic acids identified selective MDH1, MDH2, and dual inhibitors, which were used to study the relationship between MDH enzyme activity and HIF-1 inhibition. We hypothesized that dual inhibition of MDH1 and MDH2 might be a powerful approach to target cancer metabolism and selected methyl-3-(3-(4-(2,4,4-trimethylpentan-2-yl)phenoxy)propanamido)-benzoate (<B>16c</B>) as the most potent dual inhibitor. Kinetic studies revealed that compound <B>16c</B> competitively inhibited MDH1 and MDH2. Compound <B>16c</B> inhibited mitochondrial respiration and hypoxia-induced HIF-1α accumulation. In xenograft assays using HCT116 cells, compound <B>16c</B> demonstrated significant in vivo antitumor efficacy. This finding provides concrete evidence that inhibition of both MDH1 and MDH2 may provide a valuable platform for developing novel therapeutics that target cancer metabolism and tumor growth.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jmcmar/2017/jmcmar.2017.60.issue-20/acs.jmedchem.7b01231/production/images/medium/jm-2017-01231h_0018.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jm7b01231'>ACS Electronic Supporting Info</A></P>
Physical and Chemical Weathering Indices for Biotite Granite and Granitic Weathered Soil in Gyeongju
( Jae-doo Ban ),( Seong-woo Moon ),( Seong-won Lee ),( Joo-gong Lee ),( Yong-seok Seo ) 대한지질공학회 2017 지질공학 Vol.27 No.4
Physical weathering caused by external forces and chemical weathering caused by the decomposition or alteration of constituent materials are the two factors that dominate the mechanical properties of rocks. In this study, a field investigation was undertaken to identify the physical and chemical weathering characteristics of the biotite granite and granitic weathered soils in Gyeongju, South Korea. Samples were collected according to their grade of weathering and subjected to modal analysis, XRD analysis, XRF analysis, physical property tests, particle size distribution tests, and slake durability tests. Modal and XRD analysis identified these rocks as biotite granite; secondary alteration minerals were not observed. Physical property tests and particle size distribution analyses indicate an average porosity of 41.28% and a sand content of > 90 wt.%. These values are somewhat higher than those of granites in general. The results of the slake durability test and XRF analyses show that the physical and chemical weathering indices of the samples vary with the degree of weathering.
Analysis of Removal Torque of Injection Molded Zirconia Implants; An Experimental Study on Beagles.
Oh, Gye-Jeong,Ban, Jae-Sam,Lim, Hyun-Pil,Yun, Kwi-Dug,Lee, Kwang-Min,Vang, Mong-Sook,Yang, Hong-So,Kang, Seong-Soo,Shin, Jin-Ho,Kim, Ga-Hyun,Ji, Min-Kyung,Park, Sang-Won,Fisher, John G American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.1
<P>This study compared the removal torque between injection molded zirconia implants and titanium implants with resorbable blast media (RBM) surfaces in beagle humeri. Fifteen screw-shaped implants were classified into 3 groups; titanium implant with RBM surface (Group RT), injection molded zirconia implant (Group Zr) and injection molded zirconia implant with sand-blasted surface (Group ZrS). Implants were inserted into beagle humeri. After 12 weeks, removal torque values were measured. The Zr group has a slightly higher removal torque value than the RT and ZrS groups but there were no significant differences among groups. Zirconia implants shows a similar removal torque to RBM titanium implants. This in vivo study showed injection molded zirconia implants could be an alternative to RBM titanium implants in terms of removal torque.</P>
WLAN 기반 개인형 멀티미디어 캐싱 네트워크 성능 분석
반태원,김성환,류종열,이웅섭,Ban, Tae-Won,Kim, Seong Hwan,Ryu, Jongyeol,Lee, Woongsup 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.8
본 논문에서는 최근 급격히 증가하고 있는 대용량 고화질 멀티미디어 스트리밍 서비스의 품질을 개선하고 코어 네트워크의 트래픽 부담을 경감시킬 수 있는 무선 근거리 네트워크 (wireless local area network: WLAN) 기반의 캐싱 기법을 제안하다. 제안하는 캐싱 방식은 WLAN용 AP에 탑재된 저장 장치에 멀티미디어를 저장한 후 클라이언트의 스트리밍 요청에 따라 인터넷망과의 연결 없이 독자적인 스트리밍 서비스를 제공한다. 실제 상용망을 기반으로 시험망을 구축하여 초당 프레임수와 버퍼링 시간 관점에서 제안 방식의 성능을 측정하였다. 성능 분석 결과에 따르면, 제안하는 캐싱 방식은 기존의 스트리밍 방식 대비 평균 버퍼링 시간을 73.3% 감소시킬 수 있으며, 평균 FPS를 약 71.3% 향상시킬 수 있는 것으로 나타났다. In this paper, we propose a private multimedia caching scheme based on wireless local area network (WLAN) to improve the quality of service for high capacity and high quality multimedia streaming services which are recently increasing and to reduce the traffic load of core networks. The proposed caching scheme stores multimedia in the storage device mounted on WLAN APs and provides streaming services on its own without Internet connection in accordance with the request from clients. We have implemented a test network based on real commercial networks and measured the performance of the proposed caching scheme in terms of frames per second (FPS) and buffering time. According to the performance measurement results, the proposed caching scheme can reduce the average buffering time by 73.3% compared to the conventional streaming scheme. In addition, the proposed caching scheme can also improve the average FPS by 71.3% compared to the conventional streaming scheme.
Sang-Hyun Oh,Eui-Seong Hwang,Eun-Seok Choi,Gyu-Dong Park,Jin-Gu Kim,Jin-Yong Seong,Jun-Hee Cho,Keun-Do Ban,Keun-Hwan Noh,Nam-Kyeong Kim,Seaung-Suk Lee,Seok-Won Lee,Seung-Jin Yeom,Soon-Yong Kweon,Suk-K 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
We have investigated the ferroelectric properties of integrated Pt/SrBi2Ta2O9 (SBT)/Pt capacitors with capacitor-level dielectric of boron phosphosilicate glass (BPSG). A signicant reduction of remanent polarization (P-P^) was observed in the SBT capacitor as covered with BPSG lm and the polarization decay depended strongly on top electorde size. Detailed analyses showed the degradation resulted from bismuth loss in the surface region of SBT, which is closely related with the impurites diused from BPSG into SBT layer. The degradation of Pt/SBT/Pt ferroelectric capacitor was successfully prevented by inserting SiO2 layer as a impurity blocking layer between the SBT and the BPSG. Thereby device performances of SBT-based ferroelectric memory were also considerably improved.