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28th International Ocean and Polar engineering Conference, ISOPE 2018

作者： Kim, Hyunjong Parthasarathy, Nanjundan Li, Kui Ming Choi, Yoon Hwan Oshima, Nobuyuki Lee, Yeon Won Interdisciplinary program of Biomedical Mechanical and Electrical Engineering Pukyong National University Busan Korea Republic of Korea Marine Equipment Research Institute Busan Korea Republic of Research Institute of Industrial Science and Technology Pukyong National University Busan Korea Republic of Graduate School of Engineering Hokkaido University Sapporo Hokkaido Japan Department of Mechanical Design Engineering Pukyong National University Busan Korea Republic of

ISBN: (纸本)9781880653876

In order to design a wave energy generating system of a floating type, a 6- Degrees Of Freedom (DOF) motion technique was applied to Computational Fluid Dynamics (CFD) analysis on this floating body and the behavior is interpreted according to the nature of the incoming waves. In the numerical study, the tuning factor concept is employed, as it explains the relation between the maximum pitch angle and the length of the floating body and wavelength. The relation between tuning factor & pitch period for the generated waves is compared to analyze the effects of wave energy absorption. Linear waves are generated in a tank model using a single floater. In this paper, we focus on wavelength of a floater and 14 cases have been modeled for the same. It was found that the wave energy absorption varies in different parameters of wavelengths and also the different locations of the floating body in a wave affect the wave energy absorption, thus necessitating the importance of the location of a floater in a wave and its effect on wave energy absorption. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)

关键词： Computational fluid dynamics

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Corrigendum to "Dual regulatory effects of neferine on amyloid-β and tau aggregation studied by in silico, in vitro, and lab-on-a-chip technology" [Biomed. Pharmacother. 172 (2024) 1-14/116226]

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Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie 2024年 181卷 117686页

作者： Yunkwon Nam Ritu Prajapati Sujin Kim Soo Jung Shin Da Yeon Cheong Yong Ho Park Hyun Ha Park Danyou Lim Yoojeong Yoon Gyudo Lee Hyun Ah Jung Insu Park Dong-Hyun Kim Jae Sue Choi Minho Moon Department of Biochemistry College of Medicine Konyang University 158 Gwanjeodong-ro Seo-gu Daejeon 35365 Republic of Korea. Department of Food and Life Science Pukyong National University Busan 48513 Republic of Korea. Department of Biochemistry College of Medicine Konyang University 158 Gwanjeodong-ro Seo-gu Daejeon 35365 Republic of Korea Research Institute for Dementia Science Konyang University 158 Gwanjeodong-ro Seo-gu Daejeon 35365 Republic of Korea. Department of Biotechnology and Bioinformatics Korea University Sejong 30019 Republic of Korea Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology Korea University Sejong 30019 Republic of Korea. Department of Biomedical Engineering Konyang University Daejeon 35365 Republic of Korea. Department of Food Science and Human Nutrition Chonbuk National University Jeonju 54896 Republic of Korea. Department of Biomedical Engineering Konyang University Daejeon 35365 Republic of Korea. Electronic address: insupark@konyang.ac.kr. Departments of Pharmacology and Advanced Translational Medicine School of Medicine Konkuk University Seoul 05029 Republic of Korea. Electronic address: mose79@kku.ac.kr. Department of Food and Life Science Pukyong National University Busan 48513 Republic of Korea. Electronic address: choijs@pknu.ac.kr. Research Institute for Dementia Science Konyang University 158 Gwanjeodong-ro Seo-gu Daejeon 35365 Republic of Korea. Electronic address: hominmoon@konyang.ac.kr.

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Corrigendum to “Ambient-temperature catalytic degradation of aromatic compounds on iron oxide nanorods supported on carbon nanofiber sheet” [Appl. Catal. B: Environ. 259 (2019) 118066]

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Applied Catalysis B: Environmental 2020年 269卷

作者： Yiseul Park Chuhyung Kim Minsun Kim Soonhyun Kim Wonyong Choi Department of Chemical Engineering Pukyong National University Busan 48513 Republic of Korea Department of Chemical Engineering & Division of Environmental Science and Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea Smart Textile Convergence Research Group Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu 42988 Republic of Korea

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High performance optically isotropic liquid crystal display using twisted liquid crystals for flexible LCDs

High performance optically isotropic liquid crystal display ...

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SID Symposium, Seminar, and Exhibition 2018, Display Week 2018

作者： Song, Seong Min Pagidi, Srinivas Yoo, Hyesun Lee, Chang Suk Lim, Young Jin Manda, Ramesh Seo, Eo Jin Kim, Tae Hyung Lee, Gi-Dong Lee, Seung Hee Applied Materials Institute for BIN Convergence Department of BIN Convergence Technology and Department of Polymer Nano-Science and Technology Chonbuk National University JeonjuJeonbuk54896 Korea Republic of Graduate School of Flexible & Printable Electronics Chonbuk National University JeonjuJeonbuk54896 Korea Republic of Department of Electronics Engineering Dong-A University Busan49315 Korea Republic of

ISBN: (纸本)9781510867659

Optically isotropic polymer/liquid crystal (OILC) composite film in which nano-sized liquid crystal droplets are embedded in a polymer matrix with minimal scattering is proposed for flexible LCDs with high contrast ratio, fast response time and wide-viewing-angle. Feeble light scattering in conventional OILC is overcome utilizing cholesteric LC but limiting its pitch larger than LC droplets, giving rise to higher contrast ratio. In this paper, we reports on electro-optic studies of OILC cells having various pitch sizes, exhibiting an outstanding dark state and improved transmittance. © 2018, Blackwell Publishing Ltd. All rights reserved.

关键词： Liquid crystal displays

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Author Correction: Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO3/Au/MoO3 electrode with encapsulation

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Nature communications 2021年第1期12卷 7355页

作者： Dae Keun Choi Dong Hyun Kim Chang Min Lee Hassan Hafeez Subrata Sarker Jun Su Yang Hyung Ju Chae Geon-Woo Jeong Dong Hyun Choi Tae Wook Kim Seunghyup Yoo Jinouk Song Boo Soo Ma Taek-Soo Kim Chul Hoon Kim Hyun Jae Lee Jae Woo Lee Donghyun Kim Tae-Sung Bae Seung Min Yu Yong-Cheol Kang Juyun Park Kyoung-Ho Kim Muhammad Sujak Myungkwan Song Chang-Su Kim Seung Yoon Ryu Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. E-ICT-Culture-Sports Convergence Track Korea University Sejong Campus Sejong City Republic of Korea. Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. hassaniskt@***. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. hassaniskt@***. School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Advanced Materials Chemistry College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology Korea University Sejong Republic of Korea. Jeonju Center Korea Basic Science Institute (KBSI) Analysis & Researcher Division Jeollabuk-do Republic of Korea. Department of Chemistry Pukyong National University 45 Yongso-Ro Nam-gu Busan Republic of Korea. Department of Physics Chungbuk National University Cheongju Republic of Korea. Surface Materials Division Korea Institute of Materials Science (KIMS) Changwon Republic of Korea. Surface Materials Division Korea Institute of Materials Science (KIMS) Changwon Republic of Korea. cskim1025@kims.re.kr. Division of Display and Semiconductor Physics Display Convergence College of Science and Technology Korea University Sejong Campus Sejong City Republic of Korea. justie74@korea.ac.kr. Department of Applied Physics Korea University Sejong Campus Sejong City Republic of Korea. justie74@korea.ac.kr. E-ICT-Culture-Sports Conve

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Biohybrid Nanostructures: Gap Plasmon of Virus-Templated Biohybrid Nanostructures Uplifting the Performance of Organic Optoelectronic Devices (Advanced Optical Materials 11/2020)

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Advanced Optical Materials 2020年第11期8卷

作者： Hock Beng Lee Won-Geun Kim Miso Lee Jong-Min Lee Siwei He Neetesh Kumar Vasanthan Devaraj Eun Jung Choi Il Jeon Myungkwan Song Jin-Woo Oh Jae-Wook Kang Department of Flexible and Printable Electronics LANL-CBNU Engineering Institute-Korea Chonbuk National University Jeonju 54896 Korea Department of Nano Fusion Technology Pusan National University Busan 46241 Korea Research Center for Energy Convergence and Technology Pusan National University Busan 46241 Korea Department of Mechanical Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Advanced Functional Thin Films Department Korea Institute of Materials Science Changwon 641-831 Korea Department of Nanoenergy Engineering Pusan National University Busan 46241 Korea

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Chemical compositions and biological activities of marine invertebrates from the East Sea of South Korea

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Fisheries and Aquatic sciences 2019年第1期22卷 13.1-13.9页

作者： Kim, Geun-Hyeong Park, Hyeon-Ho Chandika, Pathum Ko, Seok-Chun Jung, Kyung-Mi Yoon, Sang Chul Oh, Taeg-Yun Kim, Young-Mog Jung, Won-Kyo Department of Biomedical Engineering Center for Marine-Integrated Biomedical Technology (BK21 Plus) Pukyong National University Busan 48513 South Korea Marine-Integrated Bionics Research Center Pukyong National University Busan 48513 South Korea Innovation Research Team Coreana Cosmetics Co Cheonan 31041 South Korea Team of Marine Bio-resources National Marine Biodiversity Institute of Korea Seochun Chungcheongnam-do South Korea Dokdo Fisheries Research Center National Institute of Fisheries Science Pohang 37709 South Korea Marine and Fisheries Bio-resources Division Ministry of Oceans and Fisheries Sejong Government Complex 94 Dasom 2ro Sejong-si 30110 South Korea Fisheries Resources Management Division National Institute of Fisheries Science Busan 46083 South Korea Department of Food Science and Technology Pukyong National University 45 Yeongso-ro Nam-gu Busan 48513 South Korea

Background: marine invertebrates are well known as pivotal bioresources with bioactive substances such as anti-inflammatory sterols, antitumor terpenes, and antimicrobial peptides. However, there are few scientific reports on chemical compositions and bioactivities of marine invertebrates from the East Sea of South Korea. Methods: In this study, chemical compositions and biological activities were evaluated on both 70% EtOH and hot water extracts of 5 species of marine invertebrates (Crossaster papposus japonicus, Actinostola carlgreni, Stomphia coccinea, Actinostola sp., and Heliometra glacialis) collected from the East Sea of South Korea. The antioxidant activities were measured by ABTS radical scavenging assay. The cytotoxicity and anti-inflammatory activity were evaluated using MTT and Griess reagents. Moreover, the antibacterial effect was evaluated using paper disc assay and minimum inhibitory concentration (MIC) assay. Results: In the results of antioxidant activities, 70% EtOH extract of A. carlgreni showed the highest activity (IC₅₀ 0.19 ± 0.03 mg/ml) compared to other extracts. Moreover, 70% EtOH extract of A. carlgreni could significantly suppress the nitric oxide (NO) production in lipopolysaccharide-induced RAW 264.7. All extracts treated under 400 μg/ml have no cytotoxic effects on RAW 264.7 macrophages. In the antibacterial test, both 70% EtOH extracts of C. papposus japonicus and H. glacialis showed a significant antibacterial effect on Staphylococcus aureus. The MIC values were evaluated at 256 and 512 μg/ml, respectively. Conclusions: These results suggested the bioactive potentials of marine invertebrates from the East Sea of South Korea in pharmaceutical and nutraceutical applications. © 2019 The Author(s).

关键词： Anti-inflammatory Antibacterial Antioxidant East Sea of South Korea marine invertebrates

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Graphene-dispersed silane compound used as a coating to sense immunity from biofilm formation

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Medical Devices and Sensors 2019年第3-4期2卷

作者： Kanematsu, Hideyuki Nakagawa, Ryoichi Sano, Katsuhiko Barry, Dana M. Ogawa, Akiko Hirai, Nobumitsu Kogo, Takeshi Kuroda, Daisuke Wada, Noriyuki Lee, Seung-Hyo Mizunoe, Yoshimitsu National Institute of Technology Suzuka College SuzukaMie Japan D&D Corporation YokkaichiMie Japan Department of Electrical & Computer Engineering Clarkson University PotsdamNY United States Science / Math Tutoring Center the State University of New York at Canton in Canton NY United States Division of Marine Engineering Korea Maritime University Busan Korea Republic of School of Medicine The Jikei University Tokyo Japan

Biofilm is a substance that contains organic polymers. It is derived from bacteria, produces slime and forms on material's surfaces. Therefore, it is important to properly evaluate biofilm formation using several types of sensors. Since biofilm forms easily on graphene, it is possible for graphene to serve as a sensor for biofilm formation. In the past, graphene's sensitivity to biofilm formation was confirmed by using CVD (chemical vapour deposition) graphene and by using the tape-exfoliation method. However, the CVD method was expensive and required special equipment. On the other hand, the exfoliation method was not so expensive, but the precision and reproducibility for graphene formation were problematic. In this experiment, silane-based resin, with dispersed graphene, was coated on a substrate. This coated substrate can easily be used as a sensor and is an inexpensive way to promote biofilm formation. Glass was used as the substrate, for which various samples were prepared using different concentrations of dispersed graphene. Biofilms formed on the specimens’ surfaces were analysed by using Raman spectroscopy and the crystal violet staining method. The results showed that biofilm formation capability increased with the concentration of dispersed graphene. We confirmed that the sensitivity was evaluated by the colour value for stained surfaces by crystal violet. © 2019 Wiley Periodicals, Inc.

关键词： Raman spectroscopy

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Study on the dynamic behaviors of an USV with a ROV

Study on the dynamic behaviors of an USV with a ROV

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OCEANS 2017 - Anchorage

作者： Vu, Mai The Choi, Hyeung-Sik Nhat, Thieu Quang Minh Ji, Dae-Hyeong Son, Hyun-Joong Department of Convergence Study on the Ocean Science and Technology School of Ocean and Technology Korea Maritime and Ocean University Busan Korea Republic of Mechanical Engineering Korea Maritime and Ocean University Busan Korea Republic of

ISBN: (纸本)9780692946909

In this paper, we employ a dynamics modeling method for investigating a multi-body dynamics system consisting of an unmanned surface vehicle (USV), an umbilical cable (UC), and an autonomous underwater vehicle (ROV). The ROV, which is towed by a UC for the purposes of exploration or mine hunting, is modeled with a Six-Degree-of-Freedom (6-DOF) equation of motion that reflects its hydrodynamics characteristics. The 4th-order Runge-Kutta numerical method was used to analyze the motion of the USV with its hydrodynamic coefficients which were obtained through experiments and from the literature. In modeling of the flexible UC dynamics, the governing equations of the UC dynamics are established based on the catenary equation method. The shooting method is applied to solve a two-point boundary value problem of the catenary equation. To reflect the hydrodynamic characteristics of the UC, the hydrodynamic force due to added mass and the drag force are imposed. Several simple numerical simulations were conducted to validate appropriateness of the modeling. © 2017 marine technology Society.

关键词： Degrees of freedom (mechanics)

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Autonomous Underwater Vehicle Navigation in Structured Environment

Autonomous Underwater Vehicle Navigation in Structured Envir...

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2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Daegil Park Yeongjun Lee Kwangyik Jung Hyeong-Joo Kang Hyeonseung Ki Jeong-Woo Lee Young-Ho Choi Ji-Hong Li Hyun Myung Hyun-Taek Choi Jin-Ho Suh Korea Institute of Robot convergence (KIRO) Korea Research Institute of Ship and Ocean Engineering (KRISO) Korea Advanced Institute of Science and Technology Daejeon Daejeon KR Pukyong National University Busan Busan KR

ISBN: (纸本)9781538680957;9781538680940

With the increase in developments in underwater infrastructure, the demand for development of autonomous vehicle navigation system in structured environment is also increased. However, the localization in a structured environment is a challenging problem due to signal uncertainties and distortions. In order to overcome these problems, we propose the camera and sonar aided integrated navigation system. In the proposed sensor-fusion-based localization scheme, the AUV estimates its own position continuously using artificial landmarks. The artificial landmarks for image sonar is deployed along the path to guide the AUV to the structure. The active vision markers are installed on the jacket structure, and they function as both landmarks and waypoints. This approach prevents the inherent drift of dead-reckoning velocities and collision with structures. The proposed approach was verified through a real sea experiment. The AUV conducted the full autonomous navigation from the dock to the jacket structure, and then returned to the dock without collision or significant localization error. These results show the feasibility of full autonomous navigation in a structured environment.

关键词： Sonar navigation Oceans Sonar Autonomous robots Industries Intelligent robots Autonomous underwater vehicles

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