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Design of Authoring Tool for Static and Dynamic Projection Mapping

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Computers, Materials & Continua 2021年第1期66卷 1-16页

作者： sang-Joon Kim Nammee Moon Min Hong Gooman Park Yoo-Joo choi Seoul National University of Science and Technology 172 Gongneung-dongNowon-guSeoulKorea Hoseo University 165 Sechul-ri Baebang-eupAsan-siChungcheongnam-doKorea Soonchunhyang University 336-745Asan-siChungcheongnam-doKorea Seoul Media Institute Technology 661 Deungchon-dongGangseo-guSeoulKorea

This study introduces the design details of a tool to create interactive projection-mapping content in a convenient *** the proposed tool design,a homography-based camera–projector calibration method was applied with the use of red–green–blue-depth images from a Kinect V2 sensor that did not require accurate camera calibration *** addition,the proposed tool simultaneously achieved static projection mapping that projected the image content onto a fixed object,and dynamic projection mapping that projected the image content onto a user’s body,by tracing the moving *** verify the effectiveness of the proposed content-creation tool,users with no programming capabilities were employed to create contents that were projected onto various objects in fixed positions and a user’s body in various poses,thereby analyzing the tool’s ***,the projection accuracy was analyzed at different depth positions,and the projection-mapping accuracy was verified with the use of the proposed method.

关键词： Dynamic projection mapping camera-projector calibration Kinect projection mapping content authoring tool

Stabilization of the Anatase Phase of Ti_(1-x)Sn_(x)O_(2) (x < 0.5) Nanofibers

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Nano Research 2010年第4期3卷 256-263页

作者： Kandasami Asokan Jae Young Park Sunwoo choi Changhwan Chang sang Sub Kim School of Materials Science and Engineering Inha UniversityIncheon 402-751Republic of Korea Inter-University Accelerator Centre Aruna Asaf Ali MargNew Delhi 110067India Department of Materials Test and Analysis Research Institute of Industrial Science and TechnologyPohang 790-600Republic of Korea

We experimentally investigate the stabilization of the anatase phase of Ti_(1-x)Sn_(x)O_(2)(x<0.5)nanofibers when synthesized by an electrospinning *** as-spun nanofibers became nano-grained,polycrystalline nanofibers after calcination and the diameters of the nanofibers depend on Sn *** of the anatase phase in Ti-rich compositions and incorporation of Sn ions were confirmed by X-ray diffraction,Raman,X-ray absorption near-edge structure,and photoluminescence(PL)*** from the PL study also demonstrated the tunable nature of the optical properties,with the emission maximum shifting towards higher wavelength with increasing Sn concentration.

关键词： Electrospinning nanofiber Ti_(1-x)Sn_(x)O_(2) X-ray absorption near-edge structure(XANES)

Importance of Adaptive Photometric Augmentation for Different Convolutional Neural Network

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Computers, Materials & Continua 2022年第9期72卷 4433-4452页

作者： Saraswathi Sivamani Sun il Chon Do Yeon choi Dong Hoon Lee Ji Hwan Park AI Reliability Lab ThinkforBL Consultancy ServicesGangnamSeoulKorea Department of Biosystems Engineering Chungbuk National UniversityCheongju-siChungcheongbuk-do28644Korea

Existing segmentation and augmentation techniques on convolutional neural network(CNN)has produced remarkable progress in object ***,the nominal accuracy and performance might be downturned with the photometric variation of images that are directly ignored in the training process,along with the context of the individual CNN *** this paper,we investigate the effect of a photometric variation like brightness and sharpness on different *** observe that random augmentation of images weakens the performance unless the augmentation combines the weak limits of photometric *** approach has been justified by the experimental result obtained from the PASCAL VOC 2007 dataset,with object detection CNN algorithms such as YOLOv3(You Only Look Once),Faster R-CNN(Region-based CNN),and SSD(Single Shot Multibox Detector).Each CNN model shows performance loss for varying sharpness and brightness,ranging between−80%to 80%.It was further shown that compared to random augmentation,the augmented dataset with weak photometric changes delivered high performance,but the photometric augmentation range differs for each ***,we discuss some research questions that benefit the direction of the *** results prove the importance of adaptive augmentation for individual CNN model,subjecting towards the robustness of object detection.

关键词： Object detection photometric variation adaptive augmentation convolutional neural network

Effect of Nucleases on the Cellular Internalization of Fluorescent Labeled DNA-Functionalized Single-Walled Carbon Nanotubes

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Nano Research 2008年第4期1卷 351-360页

作者： Hye Kyung Moon Chan il Chang Dong-Ki Lee Hee Cheul choi Department of Chemistry Pohang University of Science and Technology(POSTECH)San 31Hyoja-DongNam-guPohang 790-784Korea Department of Chemistry Sungkyunkwan UniversityNatural Science CampusSuwon 440-746Korea

Nuclease effects on the cell internalization of single-walled carbon nanotubes(SWNTs)functionalized with fluorescent-labeled DNA in serum containing cell growth media were *** Cy3-labeled DNA-functionalized SWNT conjugates(Cy3DNA-SWNTs)were incubated with HeLa cells in a fatal bovine serum(FBS)medium,a high fl uorescence intensity was obtained from the cells,indicative for the high level inclusion of ***,the fluorescence intensity was remarkably reduced if Cy3DNA-SWNTs were incubated with cells in the FBS-free *** systematic control experiments revealed that Cy3 dye molecules were released from Cy3DNA-SWNT conjugates by nuclease,and the free Cy3 dyes penetrate into HeLa cell with high *** the actual amounts of SWNTs internalized in the cells were almost identical for both cells incubated in the FBS-present and FBS-absent media according to the Raman measurements,one should be cautious to determine the degree of SWNT internalization based on the fl uorescence intensities especially when the coloring dye molecules were linked to oligonucleotides in nuclease containing media.

关键词： Single-walled carbon nanotube oligonucleotide cellular delivery molecular transporter nuclease

Effect of biologically active fraction of Nardostachys jatamansi on cerulein-induced acute pancreatitis

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World Journal of Gastroenterology 2012年第25期18卷 3223-3234页

作者： Gi-sang Bae Min-Sun Kim Kyoung-Chel Park Bon Soon Koo il-Joo Jo Sun Bok choi Dong-Sung Lee Youn-Chul Kim Tae-Hyeon Kim sang-Wan Seo Yong Kook Shin Ho-Joon Song Sung-Joo Park Department of Herbology School of Oriental MedicineWonkwang UniversityIksanJeonbuk 540-749South Korea Department of Beauty Science Kwangju Women's UniversityKwangju 506-713South Korea Standardized Material Bank for New Botanical Drugs College of PharmacyWonkwang UniversityIksan 570-749South Korea Department of Internal Medicine College of MedicineWonkwang UniversityIksanJeonbuk 570-749South Korea ChungBuk Technopark Bio Center JecheonChungBuk 390-250South Korea

AIM： To determine if the fraction of Nardostachysjata- mansi （N J） has the potential to ameliorate the severity of acute pancreatitis （AP）. METHODS： Mice were administered the biologically active fraction of N J, i.e., the 4th fraction （N J4）, intra- peritoneally, and then injected with the stable chole- cystokinin analogue cerulein hourly for 6 h. Six hours after the last cerulein injection, the pancreas, lung, and blood were harvested for morphological examination,measurement of cytokine expression, and examination of neutrophil infiltration. RESULTS： N J4 administration attenuated the sever- ity of AP and lung injury associated with AP. It also reduced cytokine production and neutrophil infiltration and resulted in the in vivo up-regulation of heine oxy- genase-1 （HO-1）. Furthermore, NJ4 and its biologically active fraction, N J4-2 inhibited the cerulein-induced death of acinar cells by inducing HO-1 in isolated pan- creatic acinar cells. CONCLUSION： These results suggest that N J4 may be a candidate fraction offering protection in AP and N J4 might ameliorate the severity of pancreatitis by induc- ing HO-1 expression.

关键词： Nardostachysjatamansi Acute pancreatitis Cytokines Heine oxygenase-1

Direct approach to thrombosed superior ophthalmic vein of recalcitrant indirect carotid cavernous fistula in thrombocythemia failed with multiple conventional embolization treatment

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International Journal of Ophthalmology(English edition) 2020年第4期13卷 687-692页

作者： Jungyul Park Jae-il Lee Hyeshin Jeon Hee-Young choi Department of Ophthalmology Pusan National University HospitalBusan 49241Korea Biomedical Research Institute of Pusan National University Hospital Busan 49241Korea Department of Neurosurgery Pusan National University HospitalBusan 49241Korea Department of Ophthalmology School of MedicinePusan National UniversityBusan 49241Korea

Dear Editor,I am Dr. Jungyul Park from the Division of Oculoplasty, Department of Ophthalmology, Pusan National University Hospital, Busan, Korea. I am writing to present a case of direct approach to thrombosed superior ophthalmic vein of recalcitrant indirect carotid cavernous fistula which was failed to treat with multiple conventional embolization treatment. To our knowledge this is very challenging procedure to the ophthalmologist, and not well described in literatures, especially in thrombocythemia patient with thrombosed superior ophthalmic vein.

关键词： thrombo fistula carotid

Functions of hepatic non-parenchymal cells in alcoholic liver disease

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Liver Research 2019年第2期3卷 80-87页

作者： Won-Mook choi Myung-Ho Kim Won-il Jeong Laboratory of Liver Research Graduate School of Medical Science and EngineeringKorea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea Department of Gastroenterology Liver CenterAsan Medical CenterUniversity of Ulsan College of MedicineSeoulRepublic of Korea

Alcoholic liver disease(ALD)represents a wide spectrum of disease from simple steatosis to *** there have been multiple attempts to treat ALD,its treatment is still based on abstinence from alcohol and using corticosteroids in specified ***,nearly 40%of patients with ALD who are in need of treatment are unresponsive to the current treatments,which implies a new paradigm shift for the treatment of ***,earlier studies have focused on the abnormal metabolism occurring in the hepatocytes as a protagonist in the pathogenesis of ***,increasing evidence suggests that non-parenchymal cells,such as hepatic stellate cells(HSCs),Kupffer cells,liver sinusoidal endothelial cells,and immune cells around the hepatocytes have critical roles in multiple stages of ALD either by direct or indirect cell-to-cell *** instance,in the early stage of ALD,Kupffer cells and HSCs located closely to hepatocytes contribute to the development of alcoholic steatosis and inflammation through the secretion of various inflammatory cytokines(immunologic pathways)and the activation of the endocannabinoid system(metabolic pathways).While the stage of ALD progresses to alcoholic hepatitis and fibrosis,various cell-to-cell interactions with infiltrating immune cells become highly significant at the multicellular *** review explains the diverse roles of non-parenchymal cells in the progression of ALD,as well as potential therapeutic strategies to treat ALD.

关键词： Alcoholic liver disease(ALD) Hepatic stellate cell(HSC) Immune cell Kupffer cell Natural killer(NK)cell Steatosis Steatohepatitis Fibrosis

Removal characteristics of CO_2 using aqueous MEA/AMP solutions in the absorption and regeneration process

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Journal of Environmental Sciences 2009年第7期21卷 907-913页

作者： Won-Joon choi Jong-Beom Seo sang-Yong Jang Jong-Hyeon Jung Kwang-Joong Oh Greenhouse Gas Research Center Korea Institute of Energy Research Daejeon 305343 Korea Department of Environmental Engineering Pusan National University Busan 609735 Korea Department of Health Administration Sorabol College Gyeongju 780711 Korea

The carbon dioxide （CO2） removal efficiency, reaction rate, and CO2 loading into aqueous blended monoethanolamine （MEA）＋ 2-amino-2-methyl-l-propanol （AMP） solutions to enhance absorption characteristics of MEA and AMP were carried out by the absorption/regeneration process. As a result, compared to aqueous MEA and AMP solutions, aqueous blended MEA ＋ AMP solutions have a higher CO2 loading than MEA and a higher reaction rate than AMP. The CO2 loading of rich amine of aqueous 18 wt.% MEA ＋ 12 wt.% AMP solution was 0.62 mol CO2/mol amine, which is 51.2% more than 30 wt.% MEA （0.41 mol CO2/mol amine）. Consequently, blending MEA and AMP could be an effective way to design considering economical efficiency and used to operate absorber for a long time.

关键词： carbon dioxide monoethanolamine 2-amino-2-methyl-1-propanol absorption regeneration

Miniaturized multicolor fluorescence imaging system integrated with a PDMS light-guide plate for biomedical investigation

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npj Flexible Electronics 2023年第1期7卷 494-503页

作者： Hyogeun Shin Gun-Wook Yoon Woongsun choi Donghwan Lee Hoyun choi Deok Su Jo Nakwon choi Jun-Bo Yoon il-Joo Cho Department of Biomedical Sciences College of MedicineKorea UniversitySeoulRepublic of Korea School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)DeajeonRepublic of Korea Center for Brain Technology Brain Science InstituteKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Biotechnology Research Institute of CHROMACH Co. LtdSuwonRepublic of Korea School of Chemical Engineering Sungkyunkwan University(SKKU)SuwonRepublic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulRepublic of Korea Department of Anatomy College of MedicineKorea UniversitySeoulRepublic of Korea Noul Co. LtdYonginRepublic of Korea

Miniaturized fluorescence imaging systems are promising platforms that overcome the limited use of conventional microscopes in the biomedical ***,there are physical limitations for multicolor fluorescence imaging in existing miniaturized imaging systems because multiple filters have to be integrated into a small ***,we present a miniaturized multicolor fluorescence imaging system integrated with single polydimethylsiloxane(PDMS)light-guide plate(LGP)for multicolor fluorescence *** PDMS LGP allows guiding the transmitted light from the light source only to the fluorescent samples regardless of the wavelength of the light ***,our system is capable of multicolor fluorescence imaging without multiple filters that block the excitation *** demonstrated the usability of our system in the biomedical field by observing green-and red-labeled cells in the *** proposed system can be used in a wide range of applications for studies that require multicolor fluorescence imaging in the biomedical field.

关键词： structure field system