2021 연구성과 (62 / 281)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article; Proceedings Paper | CSI7: Novel Three-Phase Current-Source Inverter With Improved Reliability | Unlike voltage-source inverters (VSI), the power decoupling element in current-source inverters (CSI) is inductor. Inductor has a long lifetime and makes the CSI more reliable. However, the traditional CSIs suffer from open-circuit problem and dangerous voltage spikes are generated if the input inductor current is intermitted. Therefore, to avoid the voltage spikes, overlap-time should be inserted in the gate signals. But these intervals distort the output currents and reduce the current source utilization. To address these issues, a novel three-phase CSI is proposed in this article. The proposed inverter is originated from the conventional seven-switch CSI named CSI7 by adding only two small film capacitors. The film capacitors along with the pre-existing diodes of the CSI7 ensure that there is always a path for the inductor current, and thus the open-circuit issue is resolved. The elimination of open-circuit issue enhances the reliability and allows to minimize the overlap-time. This will improve the quality of output currents as well. Moreover, simulation and experimental results are provided at the output power of 950 W to verify the effectiveness of the proposed inverter. | Akbar, Fazal; Cha, Honnyong; Do, Duc-Tuan | Kyungpook Natl Univ, Daegu 41566, South Korea; Thai Nguyen Univ Technol, Thai Nguyen 24131, Vietnam | ; akbar, fazal/AAU-7197-2020; Do, Duc Tuan/ISB-5137-2023 | 57194409251; 24450248400; 57202470961 | fazalakbar923@gmail.com;chahonny@knu.ac.kr;doductuan-tdh@tnut.edu.vn; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 8 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 1.62 | 2025-07-30 | 25 | 27 | Inverters; Inductors; Reliability; Capacitors; Topology; Switches; Legged locomotion; CSI; overlap-time; reliability | DUAL-BUCK INVERTER; BOOST | CSI; overlap-time; reliability | Electric inductors; Current source inverter; Current sources; Inductor currents; Output current; Power decoupling; Three-phase currents; Voltage source inverter; Voltage spikes; Electric inverters | English | 2021 | 2021-08 | 10.1109/tpel.2021.3053132 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Enhanced Energy Conversion Performance of a Magneto-Mechano-Electric Generator Using a Laminate Composite Made of Piezoelectric Polymer and Metallic Glass | Magneto-mechano-electric (MME) generators, which convert ubiquitous stray magnetic field into electricity, have attracted significant attention as a permanent power source for innumerable sensors. In this study, a MME generator based on magnetostrictive metallic substrate and piezoelectric polymer is reported. After the metallic glass sheets are stacked using adhesives, ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) is spin-casted onto Metglas lamination. The fabricated MME generator harvests an output peak voltage of approximate to 12.5 V under the applied alternating current magnetic field of 7 Oe at 38.2 Hz. A high magnetoelectric voltage coefficient of 910.14 V cm(-1) Oe(-1) obtained from the energy device is higher than those reported earlier in inorganic and polymeric piezoelectric components-based MME generators. Moreover, finite element analysis using the multiphysics simulation is carried out to theoretically investigate the magnetoelectric energy harvesting of the fabricated MME generator. This research results achieve low cost, mechanical stability, eco-friendliness, and high performance for MME generators, which is anticipated to provide a future direction for magnetoelectric energy harvesting. | Hyeon, Dong Yeol; Nam, Chaeyoung; Ham, Seong Su; Hwang, Geon-Tae; Yi, Seonghoon; Kim, Kyung Tae; Park, Kwi-Il | Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea; Pukyong Natl Univ, Dept Mat Sci & Engn, 45 Yongso Ro, Busan 48513, South Korea; Korea Inst Mat Sci, Powder Ceram Mat Div, 797 Changwon Daero, Chang Won 51508, Gyeongnam, South Korea | Yi, Seonghoon/HGC-6912-2022; Hyeon, Dong Yeol/HNR-5711-2023; Park, Kwiil/LKN-9445-2024; Nam, Pham Cam/KWT-5936-2024 | 57209099464; 57215533862; 57220094093; 36704574900; 14008383000; 56984373000; 35280874200 | ktkim@kims.re.kr;kipark@knu.ac.kr; | ADVANCED ELECTRONIC MATERIALS | ADV ELECTRON MATER | 2199-160X | 7 | 1 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2021 | 7.633 | 15.8 | 1.65 | 2025-07-30 | 25 | 27 | energy harvesting; magnetoelectrics; Metglas laminations; poly(vinylidene fluoride‐ co‐ trifluoroethylene); self‐ powered electronics | ALLOY | energy harvesting; magnetoelectrics; Metglas laminations; poly(vinylidene fluoride-co-trifluoroethylene); self-powered electronics | Adhesives; Electric generators; Energy harvesting; Fluorine compounds; Glass; Laminated composites; Magnetic fields; Mechanical stability; Metallic glass; Piezoelectricity; Polymers; Spin glass; Substrates; Alternating current; Enhanced energy conversions; Laminate composites; Magnetoelectric voltage coefficient; Multiphysics simulations; Piezoelectric components; Piezoelectric polymers; Stray magnetic fields; Magnetos | English | 2021 | 2021-01 | 10.1002/aelm.202000969 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | High-Reliability and Reduced Switch Count Single-Phase Dual-Output Current Source Inverter Using Switching-Cell Structure | In this article, a novel high-reliability single-phase dual-output current source inverter is presented. By using the switching-cell (SC) structure in the proposed topology, the overlap-time between switching transition can be minimized or eliminated. This improves the quality of ac output currents, efficiency, and dc-source utilization. Additionally, the capacitors in SC structure can help to reduce dv/dt of power switches and clamp the overshoot voltage under open-circuit problems, thus improving reliability. Two modes of common and different frequency operations are considered and detailed pulsewidth modulation schemes are presented. A 650-W hardware prototype was built and tested to verify the performance of the proposed inverter, and the results are compared with conventional single-phase dual-output current source inverters. | Duc-Tuan Do; Cha, Honnyong | Kyungpook Natl Univ, Dept Energy Engn, Daegu 702701, South Korea | ; Do, Duc Tuan/ISB-5137-2023 | 57202470961; 24450248400 | doductuan-tdh@tnut.edu.vn;chahonny@knu.ac.kr; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 6 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 0.99 | 2025-07-30 | 14 | 16 | Switches; Inverters; Legged locomotion; Topology; Logic gates; Frequency modulation; Capacitors; Current source inverter; dual-output; high-reliability; overlap-time; single-phase inverter; switching-cell; voltage overshoot | CONVERTER | Current source inverter; dual-output; high-reliability; overlap-time; single-phase inverter; switching-cell; voltage overshoot | Electric inverters; Switching; Voltage regulators; Cell structure; Current source inverter; Dual outputs; High reliability; Output current; Overlap-time; Single phasis; Single-phase inverters; Switching cells; Voltage overshoot; Reliability | English | 2021 | 2021-06 | 10.1109/tpel.2020.3040167 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Integrated Current Balancing Transformer Based Input-Parallel Output-Parallel LLC Resonant Converter Modules | The input-parallel output-parallel (IPOP) connected converter system allows the use of a low-power converter module for high-power applications. However, mismatches in the IPOP circuit parameters cause uneven current sharing between the constituent modules, which makes the IPOP system unreliable for practical use. Different techniques have been proposed so far; however, they cause an increase in magnetic volume, cost, component count, and complexity of the IPOP system. In this article, a reliable and efficient magnetic integration technique is proposed for the current sharing requirements of the IPOP system based on LLC resonant converter modules. The proposed integrated magnetic current balancing transformer (ICBT) based IPOP LLC resonant converter modules ensures both the input current sharing and output current sharing between constituent LLC modules, under the open-loop condition quite effectively. The proposed ICBT is the resonant inductors of LLC resonant converter modules, coupled to perform the function of current balancing as well as generates enough leakage inductances for resonance operation, simultaneously. Thus, it can reduce the overall magnetic volume and improves power density of the IPOP LLC modules. Moreover, the current sharing performances of the proposed ICBT in both the steady-state and dynamic-state are analyzed based on the magnetic and electrical model. To validate the performance of the proposed ICBT based IPOP two LLC modules, a 2.6-kW hardware prototype was designed, fabricated, and tested successfully. | Ahmad, Ubaid; Cha, Honnyong; Naseem, Nabeel | Kyungpook Natl Univ, Sch Energy Engn, Daegu 702701, South Korea | Naseem, Nabeel/AAL-9740-2021; Ahmad, Ubaid/IXM-9731-2023 | 58257165200; 24450248400; 57210829179 | engrubaid0456@gmail.com;chahonny@knu.ac.kr;nabeelnaseem@gmail.com; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 5 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 4.23 | 2025-07-30 | 58 | 71 | Resonant converters; Magnetic resonance; Magnetomechanical effects; Inductors; Switches; Power harmonic filters; Magnetic circuits; Current balancing; input-parallel output-parallel configuration; integrated current balancing transformer; LLC resonant converter | Current balancing; input-parallel output-parallel configuration; integrated current balancing transformer; LLC resonant converter | Magnetism; Electrical modeling; Hardware prototype; High power applications; Integrated currents; Integrated magnetic; LLC resonant converter; Magnetic integration technique; Resonant inductors; Power converters | English | 2021 | 2021-05 | 10.1109/tpel.2020.3026929 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | LED Current Balancing Scheme Using Current-Fed Quasi-Z-Source Converter | This article presents a novel two-channel light emitting diode (LED) current balancing method using current-fed (CF) quasi-Z-source (qZS) dc-dc converter. The proposed LED driver is simple in structure and requires minimal number of component counts. Currents flowing through the two LED strings are automatically balanced owing to charge (amp-sec) balance condition on capacitors in the CF-qZS network. Since current balancing is achieved automatically by passive components, current control of the proposed converter is very simple. In addition, the proposed circuit uses only one active switch and one diode. The operating principle and characteristics of the proposed two-channel LED driver are analyzed in detail. To verify validity of the proposed converter, 80 W prototype is built and tested. | Hong, Daheon; Cha, Honnyong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | 57224204267; 24450248400 | hongda1021@knu.ac.kr;chahonny@knu.ac.kr; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 12 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 0.42 | 2025-07-30 | 5 | 7 | Light emitting diodes; Capacitors; Inductors; Switches; DC-DC power converters; Stress; Switching circuits; Charge balance condition; current balancing; current-fed (CF); LED current balancing; quasi-z-source (qZS) network | DRIVER; CIRCUIT | Charge balance condition; current balancing; current-fed (CF); LED current balancing; quasi-z-source (qZS) network | Light emitting diodes; Active switches; Current balancing; Currents flowing; Led strings; Number of components; Operating principles; Quasi-z-source converters; Two channel; DC-DC converters | English | 2021 | 2021-12 | 10.1109/tpel.2021.3083842 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Meeting Abstract | National Surveillance of Respiratory Pathogens for Childhood and Adolescent Community-Acquired Pneumonia in South Korea | Roh, E. J.; Lee, M. H.; Sim, J. Y.; Lee, J. Y.; Kim, H. B.; An, Y. A.; Kim, M. J.; Kang, E. K.; Yang, E. A.; Lee, S. J.; You, H. Y.; Seo, J. H.; Lee, E.; Yang, E. S.; Cho, H. M.; Park, K. S.; Jeong, H. R.; Choi, B. S.; Kim, H. Y.; Kim, S. W.; Seong, M. S.; Kim, J. K.; Kim, B. S.; Yang, H. J.; Kim, J. T.; Chung, E. H.; Jeong, S. U. | Chungnam Natl Univ Hosp, Dept Pediat, Daejeon, South Korea; Incheon Med Ctr, Dept Pediat, Incheon, South Korea; Kangbuk Samsung Hosp, Dept Pediat, Seoul, South Korea; Hally Univ Hosp, Dept Pediat, Seoul, South Korea; Sanggye Baik Hosp, Dept Pediat, Seoul, South Korea; Bundang Cha Hosp, Dept Pediat, Bundang, South Korea; Daejin Med Ctr, Dept Pediat, Bundang, South Korea; Sejong Chungnam Univ Hosp, Dept Pediat, Sejong, South Korea; Dongkuk Univ Hosp, Dept Pediat, Ilsan, South Korea; Catholic Univ Hosp, Dept Pediat, Daejeon, South Korea; Eulji Univ Hosp Daejeon, Dept Pediat, Daejeon, South Korea; Kogel Hosp, Dept Pediat, Daejeon, South Korea; Dankook Univ Hosp, Dept Pediat, Cheonan, South Korea; Cheonnam Natl Univ Hosp, Dept Pediat, Kwangjoo, South Korea; Chosun Univ Hosp, Dept Pediat, Kwangjoo, South Korea; Jesus Hosp, Dept Pediat, Jeonju, South Korea; Kwangju Christian Hosp, Dept Pediat, Kwangju, South Korea; Daegu Catholic Univ Hosp, Dept Pediat, Daegu, South Korea; Kyungpook Natl Univ, Dept Pediat, Daegu, South Korea; Pusan Natl Univ Hosp, Dept Pediat, Pusan, South Korea; Pusan ST Marys Hosp, Dept Pediat, Pusan, South Korea; Soonchunhyang Univ Hosp, Dept Pediat, Gumi, South Korea; Kangwon Univ Hosp, Dept Pediat, Chunchon, South Korea; Ganneung Asan Hosp, Dept Pediat, Kangnung, South Korea; Soonchunhyang Univ Hosp, Dept Pediat, Seoul, South Korea; Uijeongb St Marys Hosp, Dept Pediat, Uijongbu, South Korea; Chungnam Natl Univ Hosp, Dept Pediat, Daejeon, South Korea; Korea Ctr Dis & Prevent, Anal Bacteriol, Sejong, South Korea | Kim, Ha-Jung/AGU-3492-2022; Park, Eunju/AAC-5266-2021; Chung, Eunhee/AAX-6863-2020; Kim, Min-Hyuk/ITV-2946-2023 | PEDIATRIC PULMONOLOGY | PEDIATR PULM | 8755-6863 | 1099-0496 | 56 | SCIE | PEDIATRICS;RESPIRATORY SYSTEM | 2021 | 4.09 | 15.8 | 0 | English | 2021 | 2021-06 | 바로가기 | 바로가기 | ||||||||||||||||
| ○ | ○ | Article | Near-Infrared Organic Phototransistors with p-Channel Photosensitive Layers of Conjugated Polymer Composed of bis-Octyldodecyl-Diketopyrrolopyrrole and Benzothiadiazole Units | A near-infrared (NIR)-absorbing conjugated polymer, poly[{2,5-bis-(2-octyldodecyl)-3,6-bis-(thien-2-yl)-pyrrolo[3,4-c]pyrrole-1,4-diyl}-co-{2,2 '-(2,1,3-benzothiadiazole)-5,5 '-diyl}] (PODTPPD-BT), which is synthesized via a Stille coupling reaction, can play a dual role (charge transport and sensing) in NIR-sensing organic phototransistors (OPTRs). The PODTPPD-BT films, which feature two strong optical absorption peaks at wavelengths (lambda) of 830 and 935 nm, possess a highly ordered crystalline state as evidenced by the synchrotron radiation grazing incidence X-ray diffraction (GIXD) method. The OPTRs with the PODTPPD-BT layers show typical p-channel transistor behaviors in the dark, while their best dark performance is measured at a PODTPPD-BT thickness (t) of 85 nm. The highest overall photocurrent is measured at t = 85 nm under illumination with three monochromatic NIR lights, while the highest photoresponsivity (R-C) is obtained for the thickest PODTPPD-BT layers (t = 145 nm). The flexible OPTRs with the PODTPPD-BT layers demonstrate stable sensing characteristics upon optical on/off modulations using a high-power NIR laser diode (lambda = 905 nm) used for actual light detection and ranging (LiDAR) systems. | Park, Jisu; Lee, Chulyeon; Kim, Taehoon; Kim, Hwajeong; Kim, Youngkyoo | Kyungpook Natl Univ, Sch Appl Chem Engn, KNU Inst Nanophoton Applicat KINPA, Organ Nanoelect Lab,Dept Chem Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Prior Res Ctr, Res Inst Environm Sci & Technol, Daegu 41566, South Korea | 57212038114; 56354831300; 57218650958; 15520531700; 10340424400 | ykimm@knu.ac.kr; | ADVANCED ELECTRONIC MATERIALS | ADV ELECTRON MATER | 2199-160X | 7 | 1 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2021 | 7.633 | 15.8 | 1.58 | 2025-07-30 | 20 | 24 | conjugated polymers; flexible electronics; LiDAR; near‐ infrared sensing; organic phototransistors; photoresponsive materials | FIELD-EFFECT TRANSISTORS; ALKYL CHAIN-LENGTH; CHARGE RECOMBINATION; SOLAR-CELLS; THICKNESS; MOBILITY; FILM; PERFORMANCE; MORPHOLOGY; DEPENDENCE | conjugated polymers; flexible electronics; LiDAR; near-infrared sensing; organic phototransistors; photoresponsive materials | Aromatic compounds; Conjugated polymers; Light absorption; Optical radar; Photocurrents; Phototransistors; Synchrotron radiation; 2 ,1 ,3-Benzothiadiazole; Diketopyrrolopyrroles; Light detection and ranging systems; Organic phototransistors; Photosensitive layers; Sensing characteristics; Stille coupling reaction; Synchrotron radiation-grazing incidence X-ray diffractions; Infrared devices | English | 2021 | 2021-01 | 10.1002/aelm.202000932 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Production of ferronickel from limonitic laterite ore using hydrogen reduction and cementation | Production of ferronickel from limonitic laterite ore using hydrogen reduction and cementation was studied by relying on a novel hydrometallurgical process consisting of the key steps: calcination, reductive roasting with hydrogen gas, 2-stage atmospheric hydrochloric acid leaching, and cementation with Fe. The introduction of the reusability of H-2-reduced limonitic laterite as a cementation agent instead of conventional Fe sources is an important approach of the proposed process in terms of enhancing cost-effectiveness. The effects of the type of Fe source, the amount of cementation agent, and the temperature on Ni cementation were experimentally determined. The kinetic analysis confirms that Ni cementation behavior can be elucidated by applying 1st order reaction kinetic principles, and the temperature is the most effective parameter. Based on the linear relationship of empirical data with the 1st order kinetic model and by the calculations associated with Arrhenius law, the value of the activation energy of Ni cementation onto Fe could be deduced as 7.5 kJ/mol. Greater than 99% of Ni could be recovered under the most suitable conditions, and the final product was obtained as ferronickel cement (Ni 10%), which can be applied in steel smelter as a prominent intermediate. | Wijenayake, Janaka Jayamini; Lee, So-Yeong; Park, Sung-Hun; Sohn, Ho-Sang | LS Nikko Copper Inc, Ulsan 44997, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Park, Sung-Hun/JZS-8726-2024 | 57203843664; 57208210267; 57208205988; 7201426373 | sohn@knu.ac.kr; | HYDROMETALLURGY | HYDROMETALLURGY | 0304-386X | 1879-1158 | 203 | SCIE | METALLURGY & METALLURGICAL ENGINEERING | 2021 | 4.217 | 15.8 | 0.37 | 2025-07-30 | 8 | 8 | Limonitic laterite; Cementation kinetics; Ferronickel cement; Hydrogen reduction | NICKEL | Cementation kinetics; Ferronickel cement; Hydrogen reduction; Limonitic laterite | Activation energy; Cost effectiveness; Ferroalloys; Kinetics; Nickel; Reaction kinetics; Reusability; Soils; Atmospheric hydrochloric acid leaching; Cementation kinetic; Ferronickel; Ferronickel cement; Hydrogen gas; Hydrogen reduction; Hydrometallurgical process; Kinetic analysis; Limonitic laterite ores; Limonitic laterites; Cementing (shafts) | English | 2021 | 2021-08 | 10.1016/j.hydromet.2021.105622 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Quad-Active-Bridge Converter With Current Balancing Coupled Inductor for SST Application | In this article, a current balancing coupled inductor (CBCL) based asymmetrically configured quad-active-bridge (QAB) converter is proposed. The QAB converter provides high-frequency isolation for a dc-dc stage of a solid state transformer (SST), as well as provides a modular solution to the SST medium-voltage (MV) dc link. The proposed CBCL ensures current balancing among/three active H-bridges without using any dedicated controller and without expensive sensors when transferring equal power from MV to low-voltage side. The proposed CBCL is the integration of three inductors of the active H-bridges required for power transfer and zero-voltage-switching and does not require an extra magnetic volume. Experimental results are presented to validate the performance. | Naseem, Nabeel; Cha, Honnyong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 702701, South Korea | ; Naseem, Nabeel/AAL-9740-2021 | 57210829179; 24450248400 | nabeelnaseem@gmail.com;chahonny@knu.ac.kr; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 11 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 7.2 | 2025-07-30 | 26 | 32 | Inductors; Bridge circuits; Windings; Zero voltage switching; Hafnium; Magnetomechanical effects; Magnetic flux; CBCL; current balance; current balancing coupled inductor (CBCL); imbalanced current; QAB converter; quad-active-bridge (QAB); solid-state-transformer (SST) | DC-DC CONVERTER; VOLTAGE | CBCL; current balance; current balancing coupled inductor (CBCL); imbalanced current; QAB converter; quad-active-bridge (QAB); solid-state-transformer (SST) | Bridge circuits; DC transformers; DC-DC converters; Energy transfer; Zero voltage switching; Bridge converter; Coupled inductor; Current balancing; Dedicated controllers; High-frequency isolation; Magnetic volume; Modular solution; Solid state transformer (SST); Electric inductors | English | 2021 | 2021-11 | 10.1109/tpel.2021.3076460 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Self-Current Sharing in Dual-Transformer-Based Triple-Port Active Bridge DC-DC Converter With Reduced Device Count | A self-current balancing structure of the dual-transformer-based triple-port active bridge (DT-TAB) converter with the reduced component count is proposed in this article for future sustainable energy system applications. The proposed topology inherits good characteristics of the conventional triple-port active bridge (TAB) with even power sharing in an open loop as a newly added function. It can achieve high power density over the existing TAB converters that possess current-balancing function because the need for an auxiliary magnetic circuit or sophisticated control scheme in equalizing the shared power is eliminated. Besides, the demagnetization and magnetic short-circuit problems associated with the conventional TAB converters that are been eradicated, decoupled power flow management is achieved at all conditions. Moreover, the phase shift between the input H bridges gives an additional control degree of freedom that permits the control of the output power or offers independent control of voltage magnitude during the reverse power flow, thereby extending the system-operating range. The proposed DT-TAB converter has been adapted for the two-port operation. All the power switches achieved zero-voltage-switching turn-on. Finally, the robust operation performances of the proposed DT-TAB converter have been verified by the laboratory prototype assembled and tested up to 1 kW. The experimental results presented at the end are the proof-of-concept. | Oluwasogo, Emmanuel S.; Cha, Honnyong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | Oluwasogo, Emmanuel/AAG-1003-2021 | 57221907765; 24450248400 | olemstag@gmail.com;chahonny@knu.ac.kr; | IEEE TRANSACTIONS ON POWER ELECTRONICS | IEEE T POWER ELECTR | 0885-8993 | 1941-0107 | 36 | 5 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 5.967 | 15.8 | 2.61 | 2025-07-30 | 33 | 39 | Bridge circuits; Topology; Load flow; Magnetic circuits; Windings; Switches; Integrated circuits; Additional degree of freedom (DOF); multiport bidirectional dc-dc converter (MBDC); single-phase-shift control; triple-port active bridge (TAB); zero-voltage-switching (ZVS) | Additional degree of freedom (DOF); multiport bidirectional dc-dc converter (MBDC); single-phase-shift control; triple-port active bridge (TAB); zero-voltage-switching (ZVS) | Bridge circuits; DC transformers; Degrees of freedom (mechanics); Electric load flow; Magnetic circuits; Zero voltage switching; Additional control; Current balancing; High power density; Independent control; Power flow management; Reverse Power flows; Sustainable energy systems; Voltage magnitude; DC-DC converters | English | 2021 | 2021-05 | 10.1109/tpel.2020.3029829 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Self-Selective Organic Memristor by Engineered Conductive Nanofilament Diffusion for Realization of Practical Neuromorphic System | Solution-processed organic memristors are promising ingredients to realize smart wearable electronics including neural networks. In organic memristors, tunable functionality of materials allows for realizing bio-realistic neuromorphic electronics in the view point of the mechanical and electrical characteristics. However, it is challenging to achieve high-density crossbar arrays of organic memristors due to undesirable sneak currents arising from unselected cells. For inorganic systems, considerable effort has been made to fabricate practical arrays by employing external components to suppress sneak current. By contrast, in organic memristors, it is barely possible to achieve practical systems due to the solvent orthogonality limiting the integration of the devices. Herein, an unprecedented structure of organic memristors with high self-selectivity is developed to realize practical crossbar arrays. In the developed memristor, the self-selective characteristics are achieved by systematically engineering the conductive nanofilament diffusion in the polymer. The maximum size of the memristor arrays is found to be more than 1 Mbits, and the neural networks based on the developed device showed reliable recognition performance similar to ideal software systems. This novel concept of developing the organic memristor with high self-selectivity will open a new platform for realizing next-generation flexible memory and practical neuromorphic systems linked to artificial intelligence. | Park, Hea-Lim; Kim, Min-Hwi; Kim, Hyungjin; Lee, Sin-Hyung | Seoul Natl Univ Sci & Technol, Dept Mat Sci & Engn, Seoul 01811, South Korea; Seoul Natl Univ, Sch Elect & Comp Engn, 1 Gwanak Ro, Seoul 08826, South Korea; Univ Calif Berkeley, Elect Engn & Comp Sci, Berkeley, CA 94720 USA; Kyungpook Natl Univ, Sch Elect Engn, 80 Daehak Ro, Daegu 702701, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, 80 Daehak Ro, Daegu 702701, South Korea | Kim, Hyungjin/JED-7172-2023; Lee, Sin-Hyung/ABD-6425-2022 | 55735654600; 56647038300; 57194280114; 57226880204 | sinhlee@knu.ac.kr; | ADVANCED ELECTRONIC MATERIALS | ADV ELECTRON MATER | 2199-160X | 7 | 8 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2021 | 7.633 | 15.8 | 2.03 | 2025-07-30 | 41 | 40 | conductive nanofilament; crossbar array; flexible memristors; organic memristors; self-selectivity | RESISTIVE MEMORY; MECHANISM | conductive nanofilament; crossbar array; flexible memristors; organic memristors; self-selectivity | Nanostructures; Neural networks; External components; Inorganic systems; Mechanical and electrical; Neuromorphic systems; Practical systems; Reliable recognition; Software systems; Solution-processed; Memristors | English | 2021 | 2021-08 | 10.1002/aelm.202100299 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Aspergillus awamori ameliorates the physicochemical characteristics and mineral profile of mung bean under salt stress | Background In the list of abiotic stresses, salt stress is a main growth retarding factor which affects 7% of rain-fed while 30% worldwide irrigated agriculture. However, various strategies are assumed to manage this problem, but the use of endophytes is cheap and eco-friendly. The goal of this study was to evaluate the behavior of endophytic Aspergillus awamori (EWF) in creating salt tolerance in mung bean in terms of its seedling growth, biochemical indices, antioxidant enzymes, endogenous IAA, and ionic status of the plant. Results The results revealed that the 150 mM of NaCl reduced seedling growth (seedlings' weight and length; leaves number), chlorophyll contents, and IAA. On the other hand, proline, polyphenols, flavonoids, tannin, lipid peroxidation, catalase, and ascorbate peroxidase were increased. Inoculation of EWF had promoted the mung bean growth under all tested conditions. EWF enhanced the biomass and IAA contents of the mung bean plants under salt stress. Moreover, EWF-associated mung bean seedlings exhibited low accumulation of stress markers, and Cl, Na, Na/K, and Ca/K ratio, whereas higher concentrations of Ca, Mg, K, N, and P in mung bean seedlings. Conclusion The results provided a sustainable approach in using endophytic EWF under salt stress, thus concluded that this fungus can be very handy in mung bean as well as other important crop production in saline areas. | Ali, Raid; Gul, Humaira; Hamayun, Muhammad; Rauf, Mamoona; Iqbal, Amjad; Shah, Mohib; Hussain, Anwar; Bibi, Hamida; Lee, In-Jung | Abdul Wali Khan Univ Mardan, Dept Bot, Mardan, Pakistan; Abdul Wali Khan Univ Mardan, Dept Food Sci & Technol, Mardan, Pakistan; Univ Agr Peshawar, Dept Soil & Environm Sci, Peshawar, Pakistan; Kyungpook Natl Univ, Sch Appl Biosci, Daegu 41566, South Korea | Hussain, Anwar/N-1605-2019; Hamayun, Muhammad/B-1694-2010; Shah, Mohib/AEK-5703-2022; Iqbal, Amjad/E-2010-2014; rauf, mamoona/AAC-3246-2019; Lee, In-Jung/GLS-0432-2022; Rauf, Mamoona/AAC-3246-2019 | 57222024662; 7003592765; 59297330100; 55609311400; 10142205100; 56433799400; 35621772200; 56023955400; 16425830900 | ijlee@knu.ac.kr; | CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE | CHEM BIOL TECHNOL AG | 2196-5641 | 8 | 1 | SCIE | AGRICULTURE, MULTIDISCIPLINARY | 2021 | 4.839 | 16.1 | 2.55 | 2025-07-30 | 33 | 35 | Salinity; Mung bean; Endophytic fungi; Aspergillus awamori (EWF); IAA; Ions | ARBUSCULAR MYCORRHIZAL FUNGI; ENHANCES PLANT-GROWTH; RAPID-DETERMINATION; PHOTOSYNTHESIS; PHOSPHORUS; NITROGEN | Aspergillus awamori (EWF); Endophytic fungi; IAA; Ions; Mung bean; Salinity | English | 2021 | 2021-02-10 | 10.1186/s40538-021-00208-9 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Changes in Bone Metabolism and Antioxidant Defense Systems in Menopause-Induced Rats Fed Bran Extract from Dark Purple Rice (Oryza sativa L. Cv. Superjami) | Menopause is a matter of concern for women's health due to a deficiency of female hormones; additionally, reactive oxygen species and aging can cause osteoporosis. Food becomes increasingly interesting as a menopausal woman's alternative to hormone therapy. The effects of ethanol extracts from dark purple Superjami rice bran on bone metabolism and antioxidant defense systems in menopause-induced animal models were evaluated. Female rats underwent sham surgery or were ovariectomized to induce a menopause-like state. Rats were divided into a sham control group (SHAM), an ovariectomized control group (OVX), and an ovariectomized grou supplemented with Superjami rice bran extract group (OVX-S) and fed for 8 weeks. The OVX groups exhibited significantly more weight gain, amounts of bone turnover biochemical markers (alkaline phosphatase, osteocalcin, and C-terminal telopeptide), bone loss, lipid-peroxidation and oxidative stress than the SHAM group. However, Superjami bran extract added to the diet resulted in a significant reduction in body weight and lipid peroxidation, as well as enhanced bone metabolism and antioxidant enzyme activities, in ovariectomized rats. These results propound that extracts from Superjami rice bran have therapeutic potentiality against bone loss and oxidative stress in menopause-induced states and will be useful in preventing postmenopausal osteoporosis and oxidative damage. | Chung, Soo Im; Ryu, Su Noh; Kang, Mi Young | Kyungpook Natl Univ, Ctr Food & Nutr Genom Res, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Food Sci & Nutr, Daegu 41566, South Korea; Korea Natl Open Univ, Dept Agr Sci, Seoul 03087, South Korea | Ryu, Su-Noh/AAN-5736-2020; Kim, Eun-Young/GQQ-0147-2022 | 39862602700; 7402110869; 7401549322 | zizibe0312@nate.com;ryusn@knou.ac.kr;mykang@knu.ac.kr; | NUTRIENTS | NUTRIENTS | 2072-6643 | 13 | 9 | SCIE | NUTRITION & DIETETICS | 2021 | 6.706 | 16.1 | 0.56 | 2025-07-30 | 8 | 8 | rice bran; Superjami; postmenopause; bone metabolism; oxidative stress; aging | OXIDATIVE STRESS; PHENOLIC-COMPOUNDS; OVARIECTOMY; TOCOTRIENOL; CAPACITY; DENSITY | Aging; Bone metabolism; Oxidative stress; Postmenopause; Rice bran; Superjami | Alkaline Phosphatase; Animals; Antioxidants; Biomarkers; Bone and Bones; Bone Remodeling; Female; Humans; Lipid Peroxidation; Menopause; Oryza; Osteoporosis, Postmenopausal; Oxidative Stress; Plant Extracts; Rats; Rats, Sprague-Dawley; Weight Gain; alkaline phosphatase; antioxidant; biochemical marker; carboxy terminal telopeptide; osteocalcin; plant extract; rice bran extract; unclassified drug; alkaline phosphatase; antioxidant; biological marker; plant extract; animal experiment; animal model; animal tissue; Article; black rice; body weight gain; bone metabolism; bone remodeling; bone turnover; controlled study; enzyme activity; female; lipid peroxidation; menopause; nonhuman; osteolysis; ovariectomy; oxidative stress; postmenopause osteoporosis; rat; rice bran; animal; blood; bone; chemistry; drug effect; human; menopause; metabolism; Oryza; Sprague Dawley rat | English | 2021 | 2021-09 | 10.3390/nu13092926 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Review | Curcumin, Quercetin, Catechins and Metabolic Diseases: The Role of Gut Microbiota | Polyphenols (PPs) are the naturally occurring bioactive components in fruits and vegetables, and they are the most abundant antioxidant in the human diet. Studies are suggesting that ingestion of PPs might be helpful to ameliorate metabolic syndromes that may contribute in the prevention of several chronic disorders like diabetes, obesity, hypertension, and colon cancer. PPs have structural diversity which impacts their bioavailability as they accumulate in the large intestine and are extensively metabolized through gut microbiota (GM). Intestinal microbiota transforms PPs into their metabolites to make them bioactive. Interestingly, not only GM act on PPs to metabolize them but PPs also modulate the composition of GM. Thus, change in GM from pathogenic to beneficial ones may be helpful to ameliorate gut health and associated diseases. However, to overcome the low bioavailability of PPs, various approaches have been developed to improve their solubility and transportation through the gut. In this review, we present evidence supporting the structural changes that occur after metabolic reactions in PPs (curcumin, quercetin, and catechins) and their effect on GM composition that leads to improving overall gut health and helping to ameliorate metabolic disorders. | Shabbir, Umair; Rubab, Momna; Daliri, Eric Banan-Mwine; Chelliah, Ramachandran; Javed, Ahsan; Oh, Deog-Hwan | Kangwon Natl Univ, Coll Agr & Life Sci, Dept Food Sci & Biotechnol, Chunchon 24341, South Korea; Kyungpook Natl Univ, Coll Agr & Life Sci, Dept Food Sci & Biotechnol, Daegu 41566, South Korea | Javed, Ahsan/ABK-2648-2022; Oh, Deog-Hwan/AHE-4751-2022; Shabbir, Umair/AAP-4842-2021; Daliri, Eric Banan-Mwine/JQV-7944-2023; DeogHwan, Oh/AHE-4751-2022 | 57204860460; 57200441377; 56483260100; 55954049700; 57204433098; 7203001812 | umair336@gmail.com;rubab.momna@gmail.com;ericdaliri@kangwon.ac.kr;ramachandran865@gmail.com;ahsanjaved@knu.ac.kr;deoghwa@kangwon.ac.kr; | NUTRIENTS | NUTRIENTS | 2072-6643 | 13 | 1 | SCIE | NUTRITION & DIETETICS | 2021 | 6.706 | 16.1 | 6.64 | 2025-07-30 | 222 | 241 | plant polyphenols; metabolic syndrome; biotransformation; bioavailability; gut health | IN-VITRO; DIETARY POLYPHENOLS; INSULIN-RESISTANCE; ANTIMICROBIAL ACTIVITIES; ANTIOXIDANT CAPACITY; ENDOTHELIAL-CELLS; TEA POLYPHENOLS; FAT; INFLAMMATION; RESVERATROL | Bioavailability; Biotransformation; Gut health; Metabolic syndrome; Plant polyphenols | Catechin; Curcumin; Gastrointestinal Microbiome; Humans; Metabolic Diseases; Polyphenols; Quercetin; catechin; curcumin; polyphenol; quercetin; catechin; curcumin; polyphenol; quercetin; antioxidant activity; bioavailability; biotransformation; drug isolation; drug mechanism; human; intestine flora; metabolic syndrome X; microbial community; nonhuman; nutrition; Review; metabolic disorder; microbiology | English | 2021 | 2021-01 | 10.3390/nu13010206 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Oncological outcome according to attainment of pentafecta after robot-assisted radical cystectomy in patients with bladder cancer included in the multicentre KORARC database | Objectives To investigate the oncological significance of a robot-assisted radical cystectomy (RARC)-related pentafecta in patients with bladder cancer. Patients and Methods Using the KORARC database, which includes data from 12 centres, data from 730 patients who underwent RARC between April 2007 and May 2019 were prospectively collected and retrospectively analysed. Pentafecta was achieved if patients met all of the following criteria: (i) negative soft tissue surgical margin; (ii) >= 16 lymph nodes removed; (iii) no major complications (Clavien-Dindo grade 3-5) within 90 days; (iv) no clinical recurrence within the first 12 months; and (v) no ureteroenteric stricture. Patients were divided into two groups according to pentafecta attainment, and a comparison of overall survival (OS) and cancer-specific survival (CSS) using multivariate Cox proportional analysis was then carried out. Results Of the 730 patients included in this analysis, 208 (28.5%) attained the RARC pentafecta; the remaining 522 (71.5%) did not. The mean age of the patients was 64.67 years, 85.1% were men, 53.6% received a conduit, 37.7% received orthotopic neobladders and the total complication rate was 57.8%. Those who attained the pentafecta received more neobladders (P= 0.039), were more likely to be treated with the intracorporeal technique (P< 0.001), had longer operating times (P= 0.020) and had longer console time (P= 0.021) compared with those who did not attain the pentafecta. Over a mean of 31.1 months of follow-up, the pentafecta attainment group had significantly higher OS and CSS rates compared with the non-attainment group (10-year OS 70.4% vs 58.1%, respectively [P= 0.016]; 10-year CSS 87.8% vs 70.0%, respectively [P= 0.036]). Multivariate analysis showed that the RARC pentafecta was a significant predictor of overall mortality (hazard ratio 0.561;P= 0.038). Conclusions Patients who attained the RARC pentafecta had significantly better survival outcomes compared with those who did not. These criteria could be used to standardize assessment of the surgical quality of RARC. In the future, a similar study using an independent cohort is warranted to confirm our results. | Oh, Jong Jin; Lee, Sangchul; Ku, Ja Hyeon; Kwon, Tae Gyun; Kim, Tae-Hwan; Jeon, Seung Hyun; Lee, Sang Hyup; Nam, Jong Kil; Kim, Wan Seok; Jeong, Byong Chang; Lee, Ji Youl; Hong, Sung Hoo; Rha, Koon Ho; Han, Woong Kyu; Ham, Won Sik; Lee, Young Goo; Lee, Yong Seong; Park, Sung Yul; Yoon, Young Eun; Kang, Sung Gu; Kang, Seok Ho | Seoul Natl Univ, Bundang Hosp, Dept Urol, Seongnam, South Korea; Seoul Natl Univ, Coll Med, Dept Urol, Seoul, South Korea; Seoul Natl Univ Hosp, Dept Urol, Seoul, South Korea; Kyungpook Natl Univ, Sch Med, Dept Urol, Daegu, South Korea; Kyung Hee Univ, Sch Med, Dept Urol, Seoul, South Korea; Busan Natl Univ, Yangsan Hosp, Dept Urol, Yangsan, South Korea; Inje Univ, Busan Paik Hosp, Coll Med, Dept Urol, Busan, South Korea; Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Urol, Seoul, South Korea; Catholic Univ Korea, Seoul St Marys Hosp, Coll Med, Dept Urol, Seoul, South Korea; Yonsei Univ, Severance Hosp, Coll Med, Dept Urol, Seoul, South Korea; Hallym Univ, Kangnam Sacred Heart Hosp, Coll Med, Dept Urol, Seoul, South Korea; Hallym Univ, Sacred Heart Hosp, Coll Med, Dept Urol, Anyang, South Korea; Hanyang Univ, Coll Med, Dept Urol, Seoul, South Korea; Korea Univ, Coll Med, Dept Urol, 73 Goryeodae Ro, Seoul 02841, South Korea | Ku, Ja/E-6682-2016; Jeon, Seung Hyun/AFN-3212-2022; LEE, Sunghee/HCH-4510-2022; Lee, Hye/J-2154-2015; Lee, Jung-Seok/L-6826-2019; Yoon, Young/ABG-4983-2020 | 24468588100; 57202327303; 36800523000; 15073765400; 57797823600; 7203005251; 57192520266; 8653467500; 57217264796; 7102237943; 57202074202; 37030299600; 7003388459; 7401899857; 23097952400; 15033760000; 36068330000; 12242293700; 55965389800; 35995660400; 7405684686 | mdksh@korea.ac.kr; | BJU INTERNATIONAL | BJU INT | 1464-4096 | 1464-410X | 127 | 2 | SCIE | UROLOGY & NEPHROLOGY | 2021 | 5.969 | 16.1 | 2.36 | 2025-07-30 | 19 | 17 | bladder cancer; robot cystectomy; survival; #BladderCancer; #blcsm; #uroonc | UROTHELIAL CARCINOMA; COMPLICATIONS; MORTALITY; PROPOSAL | #BladderCancer; #blcsm; #uroonc; bladder cancer; robot cystectomy; survival | Cystectomy; Databases, Factual; Disease-Free Survival; Female; Follow-Up Studies; Humans; Incidence; Male; Middle Aged; Neoplasm Staging; Operative Time; Postoperative Complications; Prognosis; Republic of Korea; Retrospective Studies; Risk Factors; Robotic Surgical Procedures; Survival Rate; Urinary Bladder; Urinary Bladder Neoplasms; antineoplastic agent; adjuvant therapy; adult; age distribution; anastomosis stenosis; Article; bladder cancer; cancer patient; cancer recurrence; cancer specific survival; controlled study; cystectomy; expectation; factual database; female; follow up; human; lymph node dissection; major clinical study; male; mortality; operation duration; outcome assessment; overall survival; pentafecta; postoperative complication; retrospective study; robot assisted radical cystectomy; robot assisted surgery; standardization; surgical margin; surgical technique; survival time; treatment outcome; ureter stricture; bladder; bladder tumor; cancer staging; clinical trial; cystectomy; diagnostic imaging; disease free survival; incidence; middle aged; multicenter study; postoperative complication; procedures; prognosis; risk factor; robot assisted surgery; South Korea; survival rate | English | 2021 | 2021-02 | 10.1111/bju.15178 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: