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Distributed Coding Scheme for Multi-view Video through Efficient Side Information Generation
Yoo, Jihwan,Ko, Min Soo,Kwon, Soon Chul,Seo, Young-Ho,Kim, Dong-Wook,Yoo, Jisang The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.5
In this paper, a distributed image coding scheme for multi-view video through an efficient generation of side information is proposed. A distributed video coding technique corrects the errors in the side information, which is generated with the original image, by using the channel coding technique at the decoder. Therefore, the more correct the generated side information is, the better the performance of distributed video coding. The proposed technique is to apply the distributed video coding schemes to the image coding for multi-view video. It generates side information by selectively and efficiently using both 3-dimensional warping based on the depth map with spatially adjacent frames and motion-compensated temporal interpolation with temporally adjacent frames. In this scheme the difference between the adjacent frames, the sizes of the motion vectors for the adjacent blocks, and the edge information are used as the selection criteria. From the experiments, it was observed that the quality of the side information generated by the proposed technique was improved by the average peak signal-to-noise ratio of 0.97dB than the one by motion-compensated temporal interpolation or 3-dimensional warping. The result from analyzing the rate-distortion curves revealed that the proposed scheme could reduce the bit-rate by 8.01% on average at the same peak signal-to-noise ratio value, compared to previous work.
Yoo, Jisang,Lee, DaeYong,Gujrati, Vipul,Rejinold, N. Sanoj,Lekshmi, Kamali Manickavasagam,Uthaman, Saji,Jeong, Chanuk,Park, In-Kyu,Jon, Sangyong,Kim, Yeu-Chun Elsevier 2017 Journal of controlled release Vol.246 No.-
<P><B>Abstract</B></P> <P>Cell-penetrating peptides (CPPs) have been widely used to deliver nucleic acid molecules. Generally, CPPs consisting of short amino acid sequences have a linear structure, resulting in a weak complexation and low transfection efficacy. To overcome these drawbacks, a novel type of CPP is required to enhance the delivery efficacy while maintaining its safe use at the same time.</P> <P>Herein, we report that a bioreducible branched poly-CPP structure capable of responding to reducing conditions attained both outstanding delivery effectiveness and selective gene release in carcinoma cells. Branched structures provide unusually strong electrostatic attraction between DNA and siRNA molecules, thereby improving the transfection capability through a tightly condensed form. We designed a modified type of nona-arginine (mR9) and synthesized a branched-mR9 (B-mR9) using disulfide bonds. A novel B-mR9/pDNA polyplex exhibited redox-cleavability and high transfection efficacy compared to conventional CPPs, with higher cell viability as well. B-mR9/VEGF siRNA polyplex exhibited significant serum stability and high gene-silencing effects <I>in vitro</I>. Furthermore, the B-mR9 polyplex showed outstanding tumor accumulation and inhibition ability <I>in vivo</I>. The results suggest that the bioreducible branched poly CPP has great potential as a gene delivery platform.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
ON THE RETRACTS AND RECODINGS OF CONTINUING CODES
YOO, JISANG Korean Mathematical Society 2015 대한수학회보 Vol.52 No.4
We investigate what happens when we try to work with continuing block codes (i.e., left or right continuing factor maps) between shift spaces that may not be shifts of finite type. For example, we demonstrate that continuing block codes on strictly sofic shifts do not behave as well as those on shifts of finite type; a continuing block code on a sofic shift need not have a uniformly bounded retract, unlike one on a shift of finite type. A right eresolving code on a sofic shift can display any behavior arbitrary block codes can have. We also show that a right continuing factor of a shift of finite type is always a shift of finite type.
Yoo, Jisang,Sanoj Rejinold, N.,Lee, DaeYong,Jon, Sangyong,Kim, Yeu-Chun Elsevier 2017 Journal of controlled release Vol.264 No.-
<P><B>Abstract</B></P> <P>Reactive oxygen species (ROS)- or protease-responsive materials have been utilized as carriers in cancer therapies because ROS and specific proteases are overproduced in cancer cells. Methionine-based polypeptides containing a thioether group are promising candidates due to their ROS-responsiveness which provides a phase transition. Herein, we developed protease-activatable cell-penetrating peptide containing a ROS-responsive methionine, a cell permeable lysine chain, and a matrix metalloproteinase (MMP)-cleavable linker. We designed a poly(<SMALL>L</SMALL>-methionine-<I>block</I>-<SMALL>L</SMALL>-lysine)-PLGLAG-PEG (MLMP) and doxorubicin (DOX) was loaded into the micelle core. The MLMP exhibited MMP-sensitive cleavage and ROS-induced DOX release. Moreover, we confirmed efficient DOX delivery into cancer cells and induction of the apoptotic capability <I>in vitro</I>. In a bio-distribution study, IR-780 dye encapsulated MLMP showed superior tumor targetability with long retention. Furthermore, MLMP (DOX) exhibited outstanding tumor inhibition capability with non-toxicity compared to free DOX, indicating that dual stimuli-MLMP has great potential as an anticancer drug delivery platform.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
유지상 ( Jisang Yoo ),박민수 ( Minsu Park ),조성규 ( Sungkyu Cho ),정형준 ( Hyeoungjoon Jeong ),박상욱 ( Sanguk Park ),이성진 ( Sungjin Lee ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2
최근 인건비보다 저렴하게 사용할 수 있는 자율주행 로봇에 대한 수요가 증가하고 있다. 팬데믹의 영향으로 마스크 착용과 체온 측정이 의무화되어 키오스크, 체온 측정기와 같은 비대면 서비스의 수요 또한 증가하였다. 하지만 이러한 기능들은 각기 다른 기계에서 독립적으로 사용되며, 현재 보급된 자율주행 로봇을 병원에서 사용하기에는 적합하지 않다고 판단하였다. 본 연구에서 개발한 마스크 착용 여부 확인, 체온 확인, 자율주행을 활용한 안내 기능을 탑재한 인공지능 병원 안내 로봇을 통해 의료진의 업무 효율화 및 잠재적 비용 감소 효과를 기대한다. 본 연구에서는 마스크 착용 여부 확인을 위해 사용한 YOLOv5 알고리즘 훈련 결과를 통하여 높은 성능을 확인하였고 열화상 카메라를 사용한 체온 측정 알고리즘을 개발하였다. 또한, 실내 자율주행 실험을 통하여 Cartographer, Navigation 기능의 정상적으로 작동함을 확인하였다.
Distributed Coding Scheme for Multi-view Video through Efficient Side Information Generation
Jihwan Yoo,Min Soo Ko,Soon Chul Kwon,Young-Ho Seo,Dong-Wook Kim,Jisang Yoo 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.5
In this paper, a distributed image coding scheme for multi-view video through an efficient generation of side information is proposed. A distributed video coding technique corrects the errors in the side information, which is generated with the original image, by using the channel coding technique at the decoder. Therefore, the more correct the generated side information is, the better the performance of distributed video coding. The proposed technique is to apply the distributed video coding schemes to the image coding for multi-view video. It generates side information by selectively and efficiently using both 3-dimensional warping based on the depth map with spatially adjacent frames and motion-compensated temporal interpolation with temporally adjacent frames. In this scheme the difference between the adjacent frames, the sizes of the motion vectors for the adjacent blocks, and the edge information are used as the selection criteria. From the experiments, it was observed that the quality of the side information generated by the proposed technique was improved by the average peak signal-to-noise ratio of 0.97dB than the one by motion-compensated temporal interpolation or 3-dimensional warping. The result from analyzing the rate-distortion curves revealed that the proposed scheme could reduce the bit-rate by 8.01% on average at the same peak signal-tonoise ratio value, compared to previous work.
Kyungsim Yeon,Chaerin Jung,Jisang Yoo APEC국제교육협력원 2014 Asia-Pacific Cybereducation Journal Vol.10 No.1
The Asia-Pacific region is an engine of global growth in political, economic, social and cultural aspects but tangible and intangible conflicts also remain in the region due to different backgrounds and experiences in history, culture, and so forth. In this respect, APEC has played its role to narrow divides and facilitate cooperative activities among 21 member economies since 1989. However, it is required to point out how these member economies can initiate and manage cooperative activities efficiently under challenging situations like recent economic crisis and remaining conflicts. This paper presents the role of education to enable member economies to understand each other and find a way to work together, and reviews one representative international educational APEC project: APEC Future Education Forum.