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| 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 |
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| ○ | ○ | Article | Inoculation of Chlorella and Food Waste Improves the Physio-Morphological Features of Red Pepper by Regulating Activating Antioxidant Defense System | Food waste is recognized as a valuable source for potential agricultural applications to supply organic matter and nutrients to arable soil. However, the information on the combined application of food waste and the plant growth-promoting bacterial strain, Chlorella, related to plant metabolic features and sodium chloride content in arable soil is limited. The present study was conducted to investigate the exogenous application of food waste along with Chlorella, which improved the physio-morphological features of red pepper. Our results revealed that this combination enhanced the organic matter in the soil, ultimately improving the fertility rate of the soil, and the physio-morphological features, such as chlorophyll a content (24.5 +/- 0.7), root (7.8 +/- 0.7) cm and shoot length (12.1 +/- 0.7) cm, fresh weight (2.1 +/- 0.05) g, dry weight (0.19 +/- 0.05) g, mineral contents, and hormonal concentration (ABA by up to 2 folds). The combined treatment also minimized free radicals via the activation of the intrinsic antioxidant series cascade and electrolyte leakage. Our findings showed that adding Chlorella and food wastes improved growth characteristics and can be used as a green bio-fertilizer for sustainable agriculture. | Kang, Sang-Mo; Imran, Muhammad; Jeon, Su-Mi; Wani, Shabir Hussain; Khan, Muhammad Aaqil; Odongkara, Peter; Kwon, Eun-Hae; Kang, Yosep; Son, Joon-Ik; Kim, Won-Chan; Lee, In-Jung | Kyungpook Natl Univ, Dept Appl Biosci, Daegu 41566, South Korea; Rural Dev Adm, Natl Inst Agr Sci, Biosafety Div, Jeonju 54874, South Korea; Daegu City Agr Technol Ctr, Dept Tech Support, Daegu 41159, South Korea; Qurtuba Univ Sci & Informat Technol, Dept Chem & Life Sci, Peshawar, Pakistan; Shere Ekashmir Univ Agr Sci & Technol Srinagar, Mt Res Field Crops Khudwani, Srinagar, Jamu & Kashmir, India; Seyen Co Ltd, Corp Affiliated Res Inst, Kyungsan 38561, South Korea | Lee, In-Jung/GLS-0432-2022; Khan, Muhammad/ABB-9797-2021; Kang, Sang-Mo/MBG-7823-2025; Imran, Muhammad/AEK-4305-2022; KIM, WON/AAJ-4506-2020; Wani, Shabir/B-4599-2014 | 56189696900; 57203898867; 58282433800; 58514151900; 26221990800; 57188585606; 58514830500; 57224398710; 57224404010; 57450233700; 55492085000; 16425830900 | kwc@knu.ac.kr;ijlee@knu.ac.kr; | PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY | PHYTON-INT J EXP BOT | 0031-9457 | 1851-5657 | 92 | 9 | SCIE | PLANT SCIENCES | 2023 | 1.3 | 62.8 | 0.31 | 2025-06-25 | 2 | 2 | Food waste; Chlorella; hormone; antioxidant | SALT STRESS; MANAGEMENT; RESPONSES; SALINITY; DROUGHT; GROWTH; MANURE; GENES | antioxidant; Chlorella; Food waste; hormone | English | 2023 | 2023 | 10.32604/phyton.2023.028224 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Isolation and characterization of PTP1B inhibitory serratene-type triterpenoids from Lycopodium serratum Thunb | Most previous studies on the bioactivity of the major constituents (Lycopodium alkaloids and serratene-type triterpenoids) of Lycopodium species have focused on their interesting neurological activities related to the treatment of Alzheimer's disease (AD). The number of studies on their antidiabetic activity is limited. In this present study, two new serratene-type triterpenoids (1 and 2) and nine analogs [seven serratenes (3-5, 7-10) and two serratanes (6 and 11)], together with one Lycopodium alkaloid (huperzine A, 12) were isolated and characterized from the methanolic extract of L. serratum. The structures of isolates were elucidated by the HRESIMS, 1D and 2D NMR analysis, and comparison with NMR data in the literature. Among the isolates, triterpenoids (4-6) showed significant inhibitory effects on PTP1B (protein tyrosine phosphatase 1B) with IC50 values of 13.50, 17.65, and 16.64 mu M, in comparison with that of the positive control, ursolic acid (IC50 = 5.98 mu M). While compounds 1, 7, and 8 exhibited moderate PTP1B inhibitory effects with IC50 values ranging from 25.30 to 51.56 mu M. Enzyme kinetic studies revealed that all these most active compounds (4-6) exhibited the same competitive PTP1B inhibition type with Ki values of 7.9, 16.9, and 8.9 mu M, respectively. In addition, the probable binding conformation of 4-6 within the PTP1B active site was studied through in silico molecular docking. The docking results demonstrated that these active triterpenoids could be docked stably into the catalytic site of the PTP1B enzyme with negative binding energies. | Ha, Manh Tuan; Le, Thi Thanh; Nguyen, Van Thu; Kim, Jeong Ah; Choi, Jae Sue; Min, Byung Sun | Daegu Catholic Univ, Coll Pharm, Drug Res & Dev Ctr, Gyeongbuk 38430, South Korea; Vietnam Mil Med Univ, Inst Pharmaceut Educ, 160 Phung Hung, Hanoi, Vietnam; Kyungpook Natl Univ, Coll Pharm, Daegu 41566, South Korea; Pukyong Natl Univ, Dept Food & Life Sci, Busan 48513, South Korea | Tuan, Ha/AAW-5444-2021 | 57189040434; 57350699400; 56398919600; 24722570900; 57698194000; 55663638200 | bsmin@cu.ac.kr; | PHYTOCHEMISTRY LETTERS | PHYTOCHEM LETT | 1874-3900 | 1876-7486 | 57 | SCIE | CHEMISTRY, MEDICINAL;PLANT SCIENCES | 2023 | 1.3 | 62.8 | 0.31 | 2025-06-25 | 2 | 2 | Lycopodium serratum; Lycopodiaceae; Serratene triterpenoids; PTP1B; Molecular docking | ALKALOIDS; EXTRACT | Lycopodiaceae; Lycopodium serratum; Molecular docking; PTP1B; Serratene triterpenoids | 16 oxo 3,24 dihydroxyserrat 14 en 21 yl acetate; 21alpha hydroxyserrat 14 en 3beta yl dihydrocaffeate; 3 o acetyltohogenol; 3beta,21beta diol serrat 14 ene 29 ferulate; huperzine A; lycernuic ketone C; miyoshianol B; miyoshianol C; plant extract; protein tyrosine phosphatase 1B inhibitor; serrat 14 en 3beta,21alpha diol; serrat 14 en 3beta,21beta diol; serratene; serratenediol; tohogeninol; triterpenoid; unclassified drug; ursolic acid; antidiabetic activity; Article; computer model; controlled study; drug conformation; drug isolation; enzyme active site; enzyme inhibition; enzyme kinetics; Huperzia serrata; IC50; in vitro study; molecular docking; nonhuman | English | 2023 | 2023-10 | 10.1016/j.phytol.2023.08.020 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Structural characterization and SARS-CoV-2 inhibitory effects of alkaloids from the roots of Asarum heterotropoides var. mandshuricum (Aristolochiaceae) | Asarum heterotropoides var. mandshuricum F. Maekawa (Aristolochiaceae), well-known as "Marchurian Wildginger", shows many bioactivities that contribute to its therapeutic effects against a wide range of diseases. In this study, phytochemical investigation of A. hetertotropoides var. mandshuricum root extract led to the isolation of one previously undescribed amide (asamide A) with a rare five-membered-ring acetonide group in natural sources and one new amide mixture (asamide B/C) together with fifteen known alkaloids and one known amide mixture. Structural elucidation of the new alkaloids was carried out based on conventional NMR spectroscopy, HRESI-MS, and ECD calculation. To the best of our knowledge, this is the first report on the isolation of asaroidoxazine B from A. heterotropoides var. mandshuricum and compounds N-feruloyl tyramine, trans-N-feruloyl octopamine, and N-trans-p-coumaroyltopamin from the genus Asarum. The isolated alkaloids were examined for their inhibitory effects on PDB6LU7 protein of SARS-CoV-2 by molecular docking. Accordingly, the isolated aristolactams, especially aristolactam glycosides were found to be promising agents for the research and development of the new anti-SARS-CoV-2 drugs. | Le, Thi Thanh; Cao, Thao Quyen; Ha, Manh Tuan; Han, Kang-Hyun; Kim, Yong-Bum; Kim, Jeong Ah; Min, Byung Sun | Daegu Catholic Univ, Coll Pharm, Drug Res & Dev Ctr, Gyeongbuk 38430, South Korea; Kyungpook Natl Univ, Inst Agr Sci & Technol, Daegu 41566, South Korea; Korea Inst Toxicol, Daejeon 34114, South Korea; Kyungpook Natl Univ, Res Inst Pharmaceut Sci, Coll Pharm, Daegu 41566, South Korea | ; Tuan, Ha/AAW-5444-2021; Quyen, Cao/AAP-9678-2020 | 57350699400; 56937820500; 57189040434; 57197058894; 55801563800; 24722570900; 55663638200 | bsmin@cu.ac.kr; | PHYTOCHEMISTRY LETTERS | PHYTOCHEM LETT | 1874-3900 | 1876-7486 | 56 | SCIE | CHEMISTRY, MEDICINAL;PLANT SCIENCES | 2023 | 1.3 | 62.8 | 0.46 | 2025-06-25 | 2 | 3 | Asarum heterotropoides; Aristolochiaceae; Alkaloid; Aristolactam; SARS-CoV-2; PDB6LU7Mpro | ACID; AMIDES | Alkaloid; Aristolactam; Aristolochiaceae; Asarum heterotropoides; PDB6LU7 M<sup>pro</sup> ; SARS-CoV-2 | alkaloid; amide; anti-SARS-CoV-2 agent; aristololactam; Asarum extract; glycoside; octopamine; phytochemical; plant extract; remdesivir; unclassified drug; Aristolochiaceae; Article; Asarum; biological activity; calculation; column chromatography; controlled study; coronavirus disease 2019; density functional theory; drug isolation; electronic circular dichroism; electrospray mass spectrometry; fractionation; heteronuclear multiple bond correlation; heteronuclear multiple quantum coherence; molecular docking; nonhuman; nuclear magnetic resonance; nuclear magnetic resonance spectroscopy; nuclear Overhauser effect; plant root; Severe acute respiratory syndrome coronavirus 2; simulation; structure analysis; therapy effect; thin layer chromatography | English | 2023 | 2023-08 | 10.1016/j.phytol.2023.06.005 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Analysis of a Solar Hybrid Electricity Generation System for a Rural Community in River State, Nigeria | This paper presents the technical and economic analysis of a solar-wind electricity generation system to meet the power requirements of a rural community (Okorobo-Ile Town in Rivers State, Nigeria) using the Renewable-energy and Energy-efficiency Technology Screening (RETScreen) software. The entire load estimation of the region was classified into high class, middle class, and lower class. Two annual electricity export rates were considered: 0.1 USD/KWh and 0.2 USD/KWh. The results from the proposed energy model comprising a 600 kW PV system and a 50 kW wind system showed that with a USD 870,000 initial cost and USD 9600 O&M cost, the annual value of the electricity generated was 902 MWh. The simple payback was 5.1 years with a net present value of USD 3,409,532 when 0.2 USD/KWh was used as the annual export rate instead of 10.8 years for simple payback and an NPV of USD 1,173,766 when 0.1 USD/KWh was used. Thus, there is a potential to install a wind-solar system with average weather conditions of 4.27 kWh/m(2)/d for the solar irradiance and 3.2 m/s for the wind speed at a 10 m hub height using a rate of 0.2 USD/KWh as the electricity export rate. | Ukoima, Kelvin Nkalo; Owolabi, Abdulhameed Babatunde; Yakub, Abdulfatai Olatunji; Same, Noel Ngando; Suh, Dongjun; Huh, Jeung-Soo | Michael Okpara Univ Agr, Dept Elect Elect Engn, Umudike 440109, Abia, Nigeria; Kyungpook Natl Univ, Reg Leading Res Ctr Smart Energy Syst, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Convergence & Fus Syst Engn, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Energy Convergence & Climate Change, Daegu 41566, South Korea | 58220603400; 57192210107; 57894905100; 57895613600; 36613529600; 7102258915 | kelvin.ukoima@mouau.edu.ng;owolabiabdulhameed@gmail.com;yakubabdulfatai1@gmail.com;samenoel1@gmail.com;dongjunsuh@knu.ac.kr;jshuh@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 8 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 1.58 | 2025-06-25 | 10 | 13 | solar energy; feasibility analysis; electricity export; net present value; wind power | ENERGY SYSTEM; ELECTRIFICATION | electricity export; feasibility analysis; net present value; solar energy; wind power | Economic analysis; Electric loads; Power generation; Solar energy; Wind; Economics analysis; Electricity export; Electricity-generation system; Export rate; Feasibility analysis; Nigeria; Rural community; Simple++; Technical analysis; The net present value (NPV); Wind power | English | 2023 | 2023-04 | 10.3390/en16083431 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Comparison of the Power Extraction Performance of an Oscillating Hydrofoil Turbine with Different Deflector Designs | The unsteady RANS equations for a two-dimensional hydrofoil were solved using ANSYS Fluent to model and simulate the hydrofoil at a constant Reynolds number, Re, of 2 x 10(5) and a fixed reduced frequency, f*, of 0.14. The simulations were performed by varying parameters, such as the number of deflectors N, tilt angle of the deflectors beta, and vertical spacing of the deflectors J* = J/c, to determine the effect of the upstream deflector's position on the hydrofoil's performance. The results demonstrated that the deflector was effective at redirecting the separated flow away from the edges, which was then amplified downstream before colliding with the leading edge of the oscillating hydrofoil to increase power extraction. The performance of the oscillating hydrofoil was highly reliant on all three studied parameters. The hydrofoil with two deflectors (N = 2) displayed marginally superior power extraction capability compared to the hydrofoil with a single deflector (N = 1). Furthermore, the hydrofoil with the rightward inclined deflector at a low tilt angle (-5 degrees >= beta >= -10 degrees) exhibited relatively better power extraction performance than the others. The best deflector design increased the hydrofoil's cycle-averaged power coefficient by approximately 32% compared to a hydrofoil without a deflector. The vortex structures revealed that the flow evolution and power extraction performance were dependent on the size, robustness, and growth rate of the leading edge vortex (LEV) as well as the timing of LEV separation. The power extraction efficiency of an oscillating hydrofoil increased in the mid downstroke and upstroke due to the formation of a more robust LEV when the hydrofoil-deflector interaction was advantageous, but it dropped in the wing reversal due to the early separation of the LEV when the hydrofoil-deflector interaction was counterproductive. | Shanmugam, Arun Raj; Park, Ki Sun; Sohn, Chang Hyun | United Arab Emirates Univ, Dept Mech & Aerosp Engn, Abu Dhabi 15551, U Arab Emirates; United Arab Emirates Univ, Natl Space Sci & Technol Ctr NSSTC, Abu Dhabi 15551, U Arab Emirates; Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | Park, Ki Sun/KEH-6331-2024 | 57209249478; 57199734999; 36806852600 | chsohn@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 8 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.49 | 2025-06-25 | 4 | 4 | deflector; flapping wing; FSI; oscillating wing; tidal turbine; renewable energy | ENERGY HARVESTING PERFORMANCE; SEMIACTIVE FLAPPING FOIL; PITCHING MOTION; AIRFOIL; SIMULATION; OPTIMIZATION; GENERATOR; PLATE | deflector; flapping wing; FSI; oscillating wing; renewable energy; tidal turbine | Hydrofoils; Oscillating flow; Reynolds number; Tidal power; Tidal power plants; Vortex flow; Wings; Deflector; Flapping-wing; FSI; Leading-edge vortices; Oscillating hydrofoil; Oscillating wing; Performance; Power extraction; Renewable energies; Tidal turbines; Extraction | English | 2023 | 2023-04 | 10.3390/en16083420 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Design of Stator Winding Turn Number of Tap-Change PMSM for EVs According to Driving Cycles | Driving cycles are commonly used to evaluate the fuel efficiency and mileage of internal combustion engine vehicles and electric vehicles (EVs). To improve the mileage of EVs, efficient propulsion motors and inverters must be employed, particularly at frequently used speed and torque points of driving cycles. In this study, the number of the stator winding turns of a tap-change permanent magnet synchronous motor (PMSM) used for EV propulsion was investigated to increase the motor and inverter energy efficiencies under an urban dynamometer driving schedule (UDDS), a highway fuel economy test (HWFET), and combined UDDS/HWFET driving cycles. The motor core loss due to the carrier harmonics, copper loss, and inverter loss were analyzed for various winding turn number combinations, and the most efficient combination was selected. Based on the analysis results, the tap-change motor winding turns that exhibited the least loss were rewound on a PMSM of a mass-produced EV. The demand energy of the proposed tap-change PMSM and that of a mass-produced PMSM in the UDDS, HWFET, and combined UDDS/HWFET driving cycles were compared through experimentation. The proposed PMSM exhibited energy improvements of 1.50%, 1.84%, and 1.65%, respectively. | Lim, Jong-Kyong; Gu, Bon-Gwan; Im, Seong-Hwan; Kim, Rae-Young | Hanyang Univ, Dept Elect Engn, Seoul 04763, South Korea; Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea; POSCO, Pohang 37859, South Korea | Kim, Rae-Young/W-5277-2019 | 57716104400; 50061273700; 57212462415; 7202933100 | bggu@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 1 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.49 | 2025-06-25 | 1 | 4 | tap-change motor; tap-changer; driving cycle; inverter loss; motor loss | MOTOR; OPTIMIZATION | driving cycle; inverter loss; motor loss; tap-change motor; tap-changer | Dynamometers; Electric inverters; Energy efficiency; Permanent magnets; Stators; Synchronous motors; Taps; Traction motors; Winding; Driving cycle; Inverter loss; Motor loss; Permanent Magnet Synchronous Motor; Stator winding; Tap changers; Tap-change motor; Test drivings; Urban dynamometer driving schedules; Winding turns; Fuel economy | English | 2023 | 2023-01 | 10.3390/en16010412 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Extensive Analysis of a Reinvigorated Solar Water Heating System Using Low-Density Polyethylene Glazing | Solar energy is one of the most promising forms of alternative energy because it has no adverse effects on the environment and is entirely free. Converting solar energy into thermal energy is the most common and straightforward method; the efficiency of solar thermal conversion is approximately 70 percent. The intermittent nature of solar energy availability affects the performance of solar water heaters (SWH), which lowers the usefulness of solar energy in residential and commercial settings, particularly for water heating. Even at low temperatures, the performance of a collector can be improved by using low-density polyethylene (LDPE) glazing instead of traditional glass because it is less expensive and lighter than glass. Using a comprehensive experimental-simulative study, the Glass Solar water heater (glass SWH) and the low-density polyethylene solar water heater (LDPE SWH) are analyzed, examined, and compared in this work. These solar water heaters have galvanized iron (GI) as their absorber material. The SWHs were operated in a closed loop at a constant mass flow rate of 0.013 kg/s, and a 4E analysis (which stands for energy, exergy, economics, and efficiency recovery ratio) was carried out. This analysis included a look at the dynamic time, uncertainty, weight reduction, carbon footprint, and series connection. An LDPE SWH has an energy efficiency that is 5.57% and an exergy efficiency that is 3.2% higher than a glass SWH. The weight of the LDPE SWH is 32.56% lower than that of the glass SWH. Compared to the price of a conventional geyser, installing our SWH results in a cost savings of 40.9%, and monthly energy costs are reduced by an average of 25.5%. Compared to October, September has the quickest dynamic time to reach the desired temperature, while October has the most significant dynamic time. The efficiency recovery ratio (ERR) of a glass SWH is 0.0239% lower than that of an LDPE SWH. LDPE SWHs had a carbon credit worth INR 294.44 more than glass SWHs. The findings of these tests demonstrate that the LDPE SWH is a practical replacement for traditional means of heating water, such as SWHs and geysers. | Duraivel, Balamurali; Muthuswamy, Natarajan; Shaik, Saboor; Cuce, Erdem; Owolabi, Abdulhameed Babatunde; Li, Hong Xian; Kavgic, Miroslava | Vellore Inst Technol, Sch Mech Engn, Dept Thermal & Energy Engn, Vellore 632014, India; Recep Tayyip Erdogan Univ, Fac Engn & Architecture, Low Zero Carbon Energy Technol Lab, Zihni Derin Campus, TR-53100 Rize, Turkiye; Recep Tayyip Erdogan Univ, Fac Engn & Architecture, Dept Mech Engn, Zihni Derin Campus, TR-53100 Rize, Turkiye; Birmingham City Univ, Sch Engn & Built Environm, Birmingham B4 7XG, England; Kyungpook Natl Univ, Reg Leading Res Ctr Smart Energy Syst, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Convergence & Fus Syst Engn, Sangju 37224, South Korea; Deakin Univ, Sch Architecture & Built Environm, Geelong Waterfront Campus, Geelong 3220, Australia; Univ Ottawa, Civil Engn Dept, 161 Louis Pasteur, Ottawa, ON K1N 6N5, Canada | ; Li, Hong/ABC-9167-2021; Shaik, Dr. Saboor/M-8170-2018; Saboor, Shaik/M-8170-2018; Cuce, Erdem/P-4562-2015; Kavgic, Miroslava/HKP-2262-2023 | 58549481400; 56349172900; 57193789174; 47560946200; 57192210107; 36701739500; 23995316100 | balzzz07@gmail.com;m.natarajan@vit.ac.in;saboor.nitk@gmail.com;erdem.cuce@erdogan.edu.tr;owolabiabdulhameed@gmail.com;hong.li@deakin.edu.au;mkavgic@uottawa.ca; | ENERGIES | ENERGIES | 1996-1073 | 16 | 16 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.73 | 2025-06-25 | 3 | 6 | flat plate solar water heater; transmissivity; low-density polyethylene (LDPE) glazing; exergy efficiency; recovery efficiency ratio; dynamic time; carbon footprint | THERMAL PERFORMANCE; EMBODIED ENERGY; EXERGY ANALYSIS; COEFFICIENTS; RADIATION; COLLECTOR; CAPACITY; CYCLE | carbon footprint; dynamic time; exergy efficiency; flat plate solar water heater; low-density polyethylene (LDPE) glazing; recovery efficiency ratio; transmissivity | Carbon footprint; Costs; Energy efficiency; Exergy; Glass; Polyethylenes; Recovery; Solar energy; Solar heating; Time series analysis; Uncertainty analysis; Dynamic time; Efficiency ratio; Exergy efficiencies; Flat plate; Flat plate solar water heater; Low-density polyethylene glazing; Performance; Recovery efficiency; Recovery efficiency ratio; Transmissivity; Solar water heaters | English | 2023 | 2023-08 | 10.3390/en16165902 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Load Prediction Algorithm Applied with Indoor Environment Sensing in University Buildings | Recently, building automation system (BAS) and building energy management system (BEMS) technologies have been applied to efficiently reduce the energy consumption of buildings. In addition, studies on utilizing large quantities of building data have been actively conducted using artificial intelligence and machine learning. However, the high cost and installation difficulties limit the use of measuring devices to sense the indoor environment of all buildings. Therefore, this study developed a comprehensive indoor environment sensor module with relatively inexpensive sensors to measure the indoor environment of a university building. In addition, an algorithm for predicting the load in real time through machine learning based on indoor environment measurement is proposed. When the reliability of the algorithm for predicting the number of occupants and load according to the indoor CO2 concentration was quantitatively assessed, the mean squared error (MSE), root mean square deviation (RMSD), and mean absolute error (MAE) were calculated to be 23.1, 4.8, and 2.5, respectively, indicating the high accuracy of the algorithm. Since the sensor used in this study is economical and can be easily applied to existing buildings, it is expected to be favorable for the dissemination of load prediction technology. | Kim, Yunho; Park, Yunha; Seo, Hyuncheol; Hwang, Jungha | Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, 80 Daehakro, Daegu 41566, South Korea | ; Seo, Hyuncheol/ABC-5117-2020 | 58943902900; 58073754800; 56083741500; 55710714500 | peter@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 2 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.61 | 2025-06-25 | 2 | 5 | energy consumption; load prediction algorithm; indoor environment sensor module; university buildings | ENERGY | energy consumption; indoor environment sensor module; load prediction algorithm; university buildings | Automation; Energy management systems; Forecasting; Intelligent buildings; Learning algorithms; Machine learning; Mean square error; Building automation systems; Energy-consumption; Environment sensing; Indoor environment; Indoor environment sensor module; Load prediction algorithm; Load predictions; Machine-learning; Prediction algorithms; Sensor modules; Energy utilization | English | 2023 | 2023-01 | 10.3390/en16020999 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Low-Density Polyethylene Degradation and Energy Yield Using Dielectric Barrier Discharge under Various Electrical Conditions | The increased use of plastics has seen the emergence of microplastics, which have become progressively more problematic. Although many degradation studies have been conducted to address the problem of microplastics, their impact has not been significant, and much time has been consumed. In this study, low-density polyethylene (LDPE) was degraded using a dielectric barrier discharge (DBD) plasma under various electrical conditions. The experimental results showed that after 120 min of treatment, the removal efficiency reached 5.44%, the carbonyl index (CI) was 1.7308, and the O/C ratio was 0.028. The degree of degradation shown in previous studies was achieved rapidly, and experimental results showed that the degree of LDPE degradation and energy yield was proportional to the voltage and frequency-more specifically, the degree of LDPE surface and internal degradation differed, which should be considered in terms of reducing the extent of mass loss. The results of this study should be helpful for future studies on microplastic degradation using DBD techniques. | Kim, Seong-Hun; Yun, Ung-Hui; Kim, Jin-Gyu | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Dept Elect Engn, Daegu 41566, South Korea | 58464715100; 57295722800; 54680957000 | kjg@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 5 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.97 | 2025-06-25 | 8 | 9 | dielectric barrier discharge; microplastics; LDPE; degradation; removal; oxygen reactive species | PHOTOCATALYTIC DEGRADATION; MICROPLASTICS; UV | degradation; dielectric barrier discharge; LDPE; microplastics; oxygen reactive species; removal | Dielectric barrier discharge; Dielectric devices; Dielectric materials; Flow control; Oxygen; Polyethylenes; Carbonyl index; Condition; Degradation study; Degradation yields; Degree of degradation; Dielectric barrier discharge plasmas; Dielectric barrier discharges; Energy yields; Microplastics; Removal efficiencies; Microplastic | English | 2023 | 2023-03 | 10.3390/en16052403 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Some uniqueness theorems for a conical Radon transform | The conical Radon transform, which assigns to a given function f on R3 its integrals over conical surfaces, arises in several imaging techniques, e.g. in astronomy and homeland security, especially when the so-called Compton cameras are involved. In many practical situations we know this transform only on a subset of its domain. In these situations, it is a natural question of what we can say about ffrom partial information. In this paper, we investigate some uniqueness theorems regarding a conical Radon transform. | Moon, Sunghwan | Kyungpook Natl Univ, Dept Math, Daegu 41566, South Korea | 56063426100 | sunghwan.moon@knu.ac.kr; | JOURNAL OF PHYSICS COMMUNICATIONS | J PHYS COMMUN | 2399-6528 | 7 | 1 | ESCI | PHYSICS, MULTIDISCIPLINARY | 2023 | 1.1 | 62.9 | 0 | 2025-06-25 | 0 | 0 | uniquenesses; theorems; conical; Radon; transform | IMAGE-RECONSTRUCTION; GAMMA-CAMERA; COMPTON; TOMOGRAPHY; INVERSION | conical; Radon; theorems; transform; uniquenesses | English | 2023 | 2023-01-01 | 10.1088/2399-6528/aca6cc | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Techno-Economic Optimization of Mini-Grid Systems in Nigeria: A Case Study of a PV-Battery-Diesel Hybrid System | This paper presents a feasibility analysis of the technical, environmental, and economic sustainability of an existing mini-grid technology system in Nigeria. The study investigates the cost and other operational parameters of the Gbamu-Gbamu solar-battery-diesel hybrid mini-grid, specifically the 85 kWp solar PV installation in the Ijebu East Local Government area of Ogun state. Situated within the Owo forest in South-West Nigeria, the mini-grid aims to reduce the effects of global warming and promote sustainable technological development in rural communities by increasing energy access through renewable sources. To assess the system's viability, this research utilized RETScreen Expert software to validate the techno-economic and environmental sustainability of the installed mini-grid solar-PV-battery-diesel system in the region. Climatic data for the study were obtained from the National Aeronautics and Space Administration (NASA). The results demonstrate that the system is economically feasible and environmentally viable, as indicated by the positive net present value (NPV) and an average monthly irradiance of 4.78 kW/h/m(2). Furthermore, the system achieved a 92.9% reduction in GHG emissions, provided a reasonable payback period of four years, and enabled a yearly electricity export of 203 MWh. These findings highlight the system's potential to enhance energy access and mitigate climate change. | Elegeonye, Hillary Iruka; Owolabi, Abdulhameed Babatunde; Ohunakin, Olayinka Soledayo; Yakub, Abdulfatai Olatunji; Yahaya, Abdullahi; Same, Noel Ngando; Suh, Dongjun; Huh, Jeung-Soo | Pan African Univ PAUWES, Inst Water & Energy Sci Including Climate Change, Dept Energy Policy, Tlemcem 13000, Algeria; Kyungpook Natl Univ, Reg Leading Res Ctr Smart Energy Syst, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Convergence & Fus Syst Engn, Sangju 37224, South Korea; Covenant Univ, Mech Engn Dept, Energy & Environm Res Grp TEERG, Ota 112104, Nigeria; Univ Johannesburg, Fac Engn & Built Environm, ZA-2094 Johannesburg, South Africa; Kyungpook Natl Univ, Dept Energy Convergence & Climate Change, Daegu 41566, South Korea | 58419025100; 57192210107; 36172824300; 57894905100; 58419707700; 57895613600; 36613529600; 7102258915 | elegeonye.hillary@gmail.com;owolabiabdulhameed@gmail.com;ohunakin@gmail.com;yakubabdulfatai1@gmail.com;yahaya@knu.ac.kr;samenoel1@gmail.com;dongjunsuh@knu.ac.kr;jshuh@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 12 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 1.09 | 2025-06-25 | 8 | 9 | techno-economic analysis; optimization; hybrid system; feasibility analysis; energy access; NPV; solar energy | RURAL ELECTRIFICATION; ENERGY | energy access; feasibility analysis; hybrid system; NPV; optimization; solar energy; techno-economic analysis | Diesel engines; Economic analysis; Electric batteries; Environmental technology; Forestry; Global warming; Greenhouse gases; Hybrid systems; Investments; NASA; Sustainable development; Economic sustainability; Energy access; Environmental sustainability; Feasibility analysis; Mini grids; Nigeria; Optimisations; Techno-Economic analysis; Techno-economics; The net present value (NPV); Solar energy | English | 2023 | 2023-06 | 10.3390/en16124645 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Temperature-Based State-of-Charge Estimation Using Neural Networks, Gradient Boosting Machine and a Jetson Nano Device for Batteries | Lithium-ion batteries are commonly used in electric vehicles, mobile phones, and laptops because of their environmentally friendly nature, high energy density, and long lifespan. Despite these advantages, lithium-ion batteries may experience overcharging or discharging if they are not continuously monitored, leading to fire and explosion risks, in cases of overcharging, and decreased capacity and lifespan, in cases of overdischarging. Another factor that can decrease the capacity of these batteries is their internal resistance, which varies with temperature. This study proposes an estimation method for the state of charge (SOC) using a neural network (NN) model that is highly applicable to the external temperatures of batteries. Data from a vehicle-driving simulator were used to collect battery data at temperatures of 25 degrees C, 30 degrees C, 35 degrees C, and 40 degrees C, including voltage, current, temperature, and time data. These data were used as inputs to generate the NN models. The NNs used to generate the model included the multilayer neural network (MNN), long short-term memory (LSTM), gated recurrent unit (GRU), and gradient boosting machine (GBM). The SOC of the battery was estimated using the model generated with a suitable temperature parameter and another model generated using all the data, regardless of the temperature parameter. The performance of the proposed method was confirmed, and the SOC-estimation results demonstrated that the average absolute errors of the proposed method were superior to those of the conventional technique. In the estimation of the battery's state of charge in real time using a Jetson Nano device, an average error of 2.26% was obtained when using the GRU-based model. This method can optimize battery performance, extend battery life, and maintain a high level of safety. It is expected to have a considerable impact on multiple environments and industries, such as electric vehicles, mobile phones, and laptops, by taking advantage of the lightweight and miniaturized form of the Jetson Nano device. | Wang, Donghun; Hwang, Jihwan; Lee, Jonghyun; Kim, Minchan; Lee, Insoo | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57336497500; 58162442700; 57201265019; 58061974000; 54979862300 | insoolee@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 6 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.12 | 2025-06-25 | 1 | 1 | lithium-ion battery; state of charge; multilayer neural network; long short-term memory; gated recurrent unit; gradient boosting machine; vehicle-driving simulator; Jetson Nano device; real time | LITHIUM-ION BATTERY | gated recurrent unit; gradient boosting machine; Jetson Nano device; lithium-ion battery; long short-term memory; multilayer neural network; real time; state of charge; vehicle-driving simulator | Brain; Cellular telephones; Charging (batteries); Electric vehicles; Ions; Lithium-ion batteries; Long short-term memory; Multilayer neural networks; Multilayers; Gated recurrent unit; Gradient boosting; Gradient boosting machine; Jetson nano device; Lifespans; Nano-devices; Real- time; State-of-charge estimation; States of charges; Vehicle driving simulators; Neural network models | English | 2023 | 2023-03 | 10.3390/en16062639 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Review | Transient Stability Analysis and Enhancement Techniques of Renewable-Rich Power Grids | New techniques and approaches are constantly being introduced to analyze and enhance the transient stability of renewable energy-source-dominated power systems. This review article extensively discusses recent papers that have proposed novel and innovative techniques for analyzing and enhancing the renewable source-dominated power system's transient stability. The inherent low-inertia characteristics of renewable energy sources combined with fast-acting power electronic devices pose new challenges in power systems. Different stability concerns exist for grid-following and subsequent grid-forming converter/inverter connections to power grids; hence, distinct solutions for enhancing the transient stability have been devised for each. Moreover, the fundamental concepts and characteristics of converter/inverter topologies are briefly discussed in this study. Recent discussions and reviews of analysis and enhancement techniques in transient stability could lead to new ways to solve problems in power systems that rely primarily on renewable energy sources. | Poulose, Albert; Kim, Soobae | Kyungpook Natl Univ, Sch Elect & Elect Engn, Dept Elect Engn, Daegu 41566, South Korea | ; Poulose, Albert/HOF-5035-2023 | 57216694893; 55377374400 | soobae.kim@knu.ac.kr; | ENERGIES | ENERGIES | 1996-1073 | 16 | 5 | SCIE | ENERGY & FUELS | 2023 | 3 | 62.9 | 0.45 | 2025-06-25 | 7 | 12 | power system stability; transient stability; transient stability analysis; transient stability enhancement; synchronizing torque; grid-following; grid-forming; low inertia; current-source converters; voltage-source converters | VIRTUAL SYNCHRONOUS GENERATORS; VOLTAGE-SOURCE CONVERTER; WIND TURBINE; FAULT-RIDE; SYNCHRONIZATION STABILITY; FREQUENCY STABILITY; SIGNAL STABILITY; CONTROL STRATEGY; ANGLE STABILITY; FORMING CONTROL | current-source converters; grid-following; grid-forming; low inertia; power system stability; synchronizing torque; transient stability; transient stability analysis; transient stability enhancement; voltage-source converters | Electric power system stability; Natural resources; Power converters; Transient analysis; Current source converters; Grid-following; Grid-forming; Low inertia; Power systems stability; Stability enhancement; Synchronizing torque; Transient stability analysis; Transient stability enhancement; Voltage source; Voltage-source converter; Renewable energy resources | English | 2023 | 2023-03 | 10.3390/en16052495 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Efficacy of air leak test in detection of anastomotic leaks after rectal excision: a retrospective case-controlled study | Purpose: Although its efficacy is uncertain, an intraoperative air leak test (ALT) is commonly used to detect mechanical defects following bowel anastomosis. This study aimed to evaluate the efficacy of ALT to detect anastomotic leakage (AL) following rectal excision.Methods: We reviewed our database for patients with rectal cancers who had undergone curative surgery between January 2012 and January 2018. Patients were grouped according to whether or not an ALT was performed. Propensity score analyses were performed to compare outcomes for groups in a 1:1 case-matched cohort.Results: In total, 1,191 patients underwent rectal excision; 438 (219 in each group) formed the case-matched cohort for analysis. The protective stoma rate was 16.0% and 14.6% in the ALT and the no-ALT groups, respectively (P = 0.791). In the ALT group, 2 patients (0.9%) showed a positive result and were treated with rectal tube drainage, resulting in no leakage. There was no significant difference in postoperative AL rate between the groups (ALT group: 4.6% vs. no-ALT group: 4.1%, P > 0.999).Conclusion: ALT played a minimal role in detecting AL following rectal excision. Further studies are warranted to validate our results and clarify whether AL can be prevented with ALT or alternative methods.[Ann Surg Treat Res 2023;104(4):214-221] | Song, Seung Ho; Park, Jun Seok; Choi, Gyu-Seog; Park, Soo Yeon; Kim, Hye Jin; Lee, Sung-Min; Na, Dong-Hee; Jeong, Min Hye | Kyungpook Natl Univ, Chilgok Hosp, Colorectal Canc Ctr, Sch Med, Daegu, South Korea; Kyungpook Natl Univ, Biomed Res Inst, Daegu, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Colorectal Canc Ctr, Sch Med, 807 Hogukro, Daegu 40414, South Korea | ; Kim, Hye/W-1059-2019; Park, Joonhong/AAZ-9885-2020 | 57221771693; 35226761100; 8058759100; 59280450200; 57204567554; 55236751200; 57854200400; 57854899000 | parkjs0802@knu.ac.kr; | ANNALS OF SURGICAL TREATMENT AND RESEARCH | ANN SURG TREAT RES | 2288-6575 | 2288-6796 | 104 | 4 | SCIE | SURGERY | 2023 | 1.2 | 63.9 | 0.33 | 2025-06-25 | 0 | 1 | Air leak test; Anastomotic leak; Laparoscopy; Rectal excision; Robotic surgical procedures | LOW ANTERIOR RESECTION; COLORECTAL ANASTOMOSES; ROUTINE; COLON; COMPLICATIONS; MULTICENTER; PREVENTION; SURVIVAL | Air leak test; Anastomotic leak; Laparoscopy; Rectal excision; Robotic surgical procedures | English | 2023 | 2023-04 | 10.4174/astr.2023.104.4.214 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Single-port versus multiport robotic total mesorectal excision for rectal cancer: initial experiences by case-matched analysis of short-term outcomes | Purpose: The da Vinci single-port (SP) system has been used in various surgical fields, including colorectal surgery. However, limited experience has been reported on its safety and feasibility. This study aims to evaluate the short-term outcomes of SP robotic surgery for the treatment of rectal cancer compared with multiport (MP) robotic surgery.Methods: Rectal cancer patients who underwent curative resection in 2020 were reviewed. A total of 43 patients underwent robotic total mesorectal excision (TME), of which 26 (13 in each group, SPTME vs. MPTME) were included in the case-matched cohort for analysis. Intraoperative and postoperative outcomes and pathological results were compared between the 2 groups.Results: Median tumor height was similar between the 2 groups (SPTME vs. MPTME: 5.9 cm [range, 2.2-9.6 cm] vs. 6.7 cm [range, 3.4-10.0 cm], P = 0.578). Preoperative chemoradiotherapy was equally performed (38.5%). The median estimated blood loss was less (20.0 mL [range, 5.0-20.0 mL] vs. 30.0 mL [range, 20.0-30.0 mL], P = 0.020) and the median hospital stay was shorter (7 days [range, 6-8 days] vs. 8 days [range, 7-9 days], P = 0.055) in the SPTME group. Postoperative complications did not differ (SPTME vs. MPTME: 7.7% vs. 23.1%, P = 0.587). One patient in the SPTME group and 3 in the MPTME group experienced anastomotic leakage.Conclusion: SP robotic TME showed perioperative outcomes similar to MP robotic TME. The SP robotic system can be considered a surgical option for the treatment of rectal cancer. Further prospective randomized trials with larger cohorts are required.[Ann Surg Treat Res 2023;105(2):99-106] | Jeong, Min Hye; Kim, Hye Jin; Choi, Gyu-Seog; Song, Seung Ho; Park, Jun Seok; Park, Soo Yeun; Lee, Sung Min; Na, Dong Hee | Kyungpook Natl Univ, Chilgok Hosp, Colorectal Canc Ctr, Sch Med, Daegu, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Colorectal Canc Ctr, 807 Hogukro, Daegu 41404, South Korea | ; Kim, Hye/W-1059-2019; Park, Joonhong/AAZ-9885-2020 | 57854899000; 57204567554; 8058759100; 57221771693; 35226761100; 40561578300; 55236751200; 57854200400 | hjinkim@knu.ac.kr; | ANNALS OF SURGICAL TREATMENT AND RESEARCH | ANN SURG TREAT RES | 2288-6575 | 2288-6796 | 102 | 5 | SCIE | SURGERY | 2023 | 1.2 | 63.9 | 2.28 | 2025-06-25 | 7 | 7 | Rectal neoplasms; Robotic surgical procedures; Single-port robotic surgery; Total mesorectal excision | LAPAROSCOPIC SURGERY | Rectal neoplasms; Robotic surgical procedures; Single-port robotic surgery; Total mesorectal excision | English | 2023 | 2023-08 | 10.4174/astr.2023.105.2.99 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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