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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 | Antifibrosis treatment by inhibition of VEGF, FGF, and PDGF receptors improves bladder wall remodeling and detrusor overactivity in association with modulation of C-fiber afferent activity in mice with spinal cord injury | Aims Spinal cord injury (SCI) above the sacral level causes bladder dysfunction and remodeling with fibrosis. This study examined the antifibrotic effects using nintedanib, an inhibitor of vascular endothelial growth factor, fibroblast growth factor, and platelet-derived growth factor receptors, on detrusor overactivity (DO) and bladder fibrosis, as well as the modulation mechanisms of C-fiber afferent pathways. Methods Thirty female C57BL/6 mice were divided into group A (spinal intact), group B (SCI with vehicle), and group C (SCI with nintedanib). At 2 weeks after SCI, vehicle or 50 mg/kg nintedanib was administered subcutaneously for 2 weeks. Then, cystometry was conducted, followed by RT-PCR measurements of fibrosis-related molecules, muscarinic, beta-adrenergic, TRP and purinergic receptors in the bladder or L6-S1 dorsal root ganglia (DRG). Trichrome stain and Western blot analysis of transforming growth factor-beta and fibronectin were performed in the bladder. TRPV1 expression in L6 DRG was measured by immunohistochemistry. Results In cystometry, intercontraction intervals, nonvoiding contractions, voided volume, and voiding efficiency were significantly improved in group C versus group B. RT-PCR, Western blotting, and trichrome staining revealed the fibrotic changes in the bladder of group B, which was improved in group C. Increased messenger RNA levels of TRPV1, TRPA1, P2X(2), and P2X(3) in DRG of group B were significantly decreased in group C. TRPV1 immunoreactivity in DRG was increased in group B, but decreased in group C. Conclusions Nintedanib improves storage and voiding dysfunctions and bladder fibrosis in SCI mice. Also, nintedanib-induced improvement of DO is associated with reduced expression of C-fiber afferent markers, suggesting the modulation of bladder C-fiber afferent activity. | Kwon, Joonbeom; Lee, Eun-Ju; Cho, Hyun-Jung; Jang, Ji-Ae; Han, Min-Su; Kwak, Eunkyoung; Kim, Haesoo; An, Jihyun; Park, Donghwi; Han, Seungwoo; Shimizu, Nobutaka; Suzuki, Takahisa; Takaoka, Ei-Ichiro; Yoshimura, Naoki | Daegu Fatima Hosp, Dept Urol, Daegu, South Korea; Daegu Fatima Hosp, Res Inst, Daegu, South Korea; Daegu Fatima Hosp, Dept Pathol, Daegu, South Korea; Daegu Fatima Hosp, Dept Anesthesiol, Daegu, South Korea; Univ Ulsan, Dept Phys Med & Rehabil, Coll Med, Ulsan, South Korea; Kyungpook Natl Univ, Dept Internal Med, Sch Med, Daegu, South Korea; Univ Pittsburgh, Sch Med, Dept Urol, Suite 700,Kaufmann Med Bldg,3471 Fifth Ave, Pittsburgh, PA 15213 USA | Han, Min/S-4827-2016; Han, Seungwoo/R-5326-2019; Park, Donghwi/GYQ-6185-2022; Kwon, Joonbeom/J-7512-2017 | 57198430572; 57199433046; 57211205772; 57200248861; 59117111500; 55189430000; 57223867384; 59797300100; 56606561400; 55246807000; 36060171800; 59056750700; 12239806600; 7402665523 | nyos@pitt.edu; | NEUROUROLOGY AND URODYNAMICS | NEUROUROL URODYNAM | 0733-2467 | 1520-6777 | 40 | 6 | SCIE | UROLOGY & NEPHROLOGY | 2021 | 2.367 | 69.4 | 1.21 | 2025-07-30 | 10 | 11 | bladder fibrosis; detrusor overactivity; spinal cord injury | REFLEX PATHWAYS; TGF-BETA; FIBROSIS; PLASTICITY; MODEL | bladder fibrosis; detrusor overactivity; spinal cord injury | Animals; Female; Fibroblast Growth Factors; Mice; Mice, Inbred C57BL; Receptors, Platelet-Derived Growth Factor; Spinal Cord Injuries; Urinary Bladder; Vascular Endothelial Growth Factor A; ampicillin; beta adrenergic receptor; beta adrenergic receptor stimulating agent; fibroblast growth factor; fibronectin; ketoprofen; muscarinic receptor; nintedanib; platelet derived growth factor; vanilloid receptor 1; vanilloid receptor 2; vasculotropin; fibroblast growth factor; platelet derived growth factor receptor; vasculotropin A; animal experiment; animal tissue; Article; bladder dysfunction; bladder tissue; bladder wall; controlled study; cystometry; female; immunohistochemistry; immunoreactivity; mouse; neuromodulation; nonhuman; overactive bladder; reverse transcription polymerase chain reaction; sensory nerve; spinal cord injury; spinal ganglion; voiding efficiency; Western blotting; animal; bladder; C57BL mouse; complication; spinal cord injury | English | 2021 | 2021-08 | 10.1002/nau.24704 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | Meeting Abstract | Basic Science Essay Winner | Kwon, Joonbeom; Lee, Eun-Ju; Cho, Hyun-Jung; Jang, Ji-Ae; Han, Min-Su; Kwak, Eun Kyung; Kim, Haesoo; An, Jihyun; Park, Donghwi; Han, Seungwoo; Shimizu, Nobutaka; Suzuki, Takahisa; Takaoka, Ei-ichiro; Yoshimura, Naoki | Daegu Fatima Hosp, Dept Urol, Daegu, South Korea; Daegu Fatima Hosp, Res Inst, Daegu, South Korea; Univ Ulsan, Coll Med, Dept Pathol, Ulsan, South Korea; Univ Ulsan, Coll Med, Dept Anesthesiol, Ulsan, South Korea; Univ Ulsan, Coll Med, Dept Phys Med & Rehabil, Ulsan, South Korea; Kyungpook Natl Univ Hosp, Dept Internal Med, Daegu, South Korea; Univ Pittsburgh, Sch Med, Dept Urol, Pittsburgh, PA USA | Han, Min/S-4827-2016; Park, Donghwi/GYQ-6185-2022; Kwon, Joonbeom/J-7512-2017 | NEUROUROLOGY AND URODYNAMICS | NEUROUROL URODYNAM | 0733-2467 | 1520-6777 | 40 | SCIE | UROLOGY & NEPHROLOGY | 2021 | 2.367 | 69.4 | 0 | English | 2021 | 2021-02 | 10.1002/nau.24638 | 바로가기 | 바로가기 | 바로가기 | ||||||||||||||
| ○ | ○ | Article | Reperfusion Therapy in Acute Ischemic Stroke with Active Cancer: A Meta-Analysis Aided by Machine Learning | Objectives: While the prevalence of active cancer patients experiencing acute stroke is increasing, the effects of active cancer on reperfusion therapy outcomes are inconclu-sive. Thus, we aimed to compare the safety and outcomes of reperfusion therapy in acute stroke patients with and without active cancer. Materials and Methods: A compre-hensive literature search was conducted for studies comparing the effects of intrave-nous thrombolysis (IVT) or endovascular treatment (EVT) in ischemic stroke patients with and without active cancer. The literature was screened using both a manual and machine learning algorithm approach. The outcomes evaluated were symptomatic intracerebral hemorrhage (sICH), all-type intracerebral hemorrhage (aICH), successful recanalization, favorable outcomes (modified Rankin Scale, 0-2), and mortality. We calculated the pooled odds ratio (OR) and 95% confidence interval (CI) using the ran-dom-effects model from the included studies. Results: Seven studies were analyzed in this meta-analysis. IVT (n = 1012) was associated with an increased risk of sICH (OR, 9.80; 95% CI, 3.19-30.13) in the active cancer group. However, no significant differen-ces in aICH, favorable outcomes, and mortality were found between groups. Although sICH and successful recanalization in the EVT group (n = 2496) were similar, we observed fewer favorable outcomes (OR, 0.55; 95% CI, 0.33-0.93) and a high preva-lence of mortality (OR, 2.91; 95% CI, 1.89-4.47) in the active cancer group. Conclusions: Reperfusion therapy may benefit selected patients with acute ischemic stroke with active cancer, considering the comparable clinical outcomes of IVT and pro-cedure-related outcomes of EVT. These results should be cautiously interpreted and confirmed in future well-designed large-scale studies. | Eun, Mi-Yeon; Jeon, Eun-Tae; Seo, Kwon-Duk; Lee, Dongwhane; Jung, Jin-Man | Kyungpook Natl Univ, Kyungpook Natl Univ Chilgok Hosp, Sch Med, Dept Neurol, Daegu, South Korea; Korea Univ, Korea Univ Ansan Hosp, Dept Neurol, Coll Med, 123,Jeokgeum Ro, Ansan 15355, South Korea; Korea Univ, Korea Univ Ansan Hosp, Med Sci Res Ctr, Coll Med, Ansan, South Korea; Natl Hlth Insurance Serv Ilsan Hosp, Dept Neurol, Goyang, South Korea; Eulji Univ, Uijeongbu Eulji Med Ctr, Dept Neurol, Uijongbu, South Korea; Korea Univ, Zebrafish Translat Med Res Ctr, Ansan, South Korea | Eun, Mi-Yeon/AAV-2877-2021; Seo, Kwonduk/HLG-9100-2023; Jung, Jin-Man/LJL-8037-2024; Jeon, Eun-Tae/AEI-9225-2022 | 36463396500; 57195325591; 57219304565; 56076445500; 15755814800 | sodium1975@korea.ac.kr; | JOURNAL OF STROKE & CEREBROVASCULAR DISEASES | J STROKE CEREBROVASC | 1052-3057 | 1532-8511 | 30 | 6 | SCIE | NEUROSCIENCES;PERIPHERAL VASCULAR DISEASE | 2021 | 2.677 | 69.4 | 1.67 | 2025-07-30 | 13 | 14 | Stroke; Reperfusion; Cancer; Meta; analysis; Machine learning | TISSUE-PLASMINOGEN ACTIVATOR; THROMBOLYSIS; THROMBECTOMY; ALTEPLASE; RISK | Cancer; Machine learning; Meta-analysis; Reperfusion; Stroke | Administration, Intravenous; Aged; Aged, 80 and over; Endovascular Procedures; Female; Fibrinolytic Agents; Humans; Ischemic Stroke; Machine Learning; Male; Middle Aged; Neoplasms; Recovery of Function; Risk Assessment; Risk Factors; Thrombolytic Therapy; Time Factors; Treatment Outcome; alteplase; fibrinolytic agent; aged; Article; brain hemorrhage; brain ischemia; clinical outcome; controlled study; human; machine learning; malignant neoplasm; mechanical thrombectomy; meta analysis; mortality; patient safety; priority journal; Rankin scale; recanalization; reperfusion; systematic review; adverse event; brain ischemia; convalescence; endovascular surgery; female; fibrinolytic therapy; intravenous drug administration; male; middle aged; neoplasm; risk assessment; risk factor; time factor; treatment outcome; very elderly | English | 2021 | 2021-06 | 10.1016/j.jstrokecerebrovasdis.2021.105742 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article; Retracted Publication | RETRACTED: Fixed Point of Rational Contractions and Its Application for Secure Dynamic Routing in Wireless Sensor Networks (Retracted Article) | Security is one of the major concerns for data communication over wireless sensor networks (WSNs). Dynamic routing algorithms can provide small similarity paths of data delivery between two consecutive transmitted packets, improving data security without adding extra information or control messages. This article illustrates the iteration of the fixed point (FP) of rational contractions and generalized Banach contractions (BC) in the setting of F-metric space (F-MS). It also describes an FP of the said mappings, while restricting the imposition of the contraction only to a subset of the F-MS, the closed ball, rather than executing it on the entire F-MS. The results have been verified and supported by concise examples. Further, the application of the functional equation proved results with randomization is given to find a solution for secure dynamic routing of data transmission in WSNs. The application is a tool to analyze and model a network structure in which sensors can be deployed with high security and low risk in a greater region (sensor field), thus boosting the accuracy. | Asif, Awais; Savas, Ekrem; AlSalman, Hussain; Arshad, Muahammad; Gumaei, Abdu; Rehman, Abdul | Int Islamic Univ Islamabad, Dept Math & Stats, Islamabad 44000, Pakistan; Usak Univ, Dept Math, Amkara, Turkey; King Saud Univ, Coll Comp & Informat Sci, Dept Comp Sci, Riyadh 11543, Saudi Arabia; Taiz Univ, Fac Appl Sci, Comp Sci Dept, Taizi 6803, Yemen; Dept Comp Sci, Daegu 41566, South Korea; Kyungpook Natl Univ, Daegu 41566, South Korea | ; Gumaei, Abdu/J-6288-2019; Rehman, Abdul/D-5630-2019 | 59302346900; 7003909633; 57193675119; 59284144300; 55332296700; 57200894071 | abdugumaei@gmail.com; | SECURITY AND COMMUNICATION NETWORKS | SECUR COMMUN NETW | 1939-0114 | 1939-0122 | 2021 | SCIE | COMPUTER SCIENCE, INFORMATION SYSTEMS;TELECOMMUNICATIONS | 2021 | 1.968 | 69.4 | 0.06 | 2025-07-30 | 1 | 1 | MAPPINGS | Iterative methods; Network routing; Network security; Banach contractions; Control messages; Data delivery; Data-communication; Dynamic routing; Fixed points; Functional equation; Information messages; ITS applications; Metric spaces; Wireless sensor networks | English | 2021 | 2021-10-08 | 10.1155/2021/9939546 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Micro-electromechanical system based optimized steering angle estimation mechanism for customized self-driving vehicles | In an automated steering system of the self-driving vehicles, the steering wheel angle is measured by the absolute angular displacement sensors or relative angle sensors. However, these sensors either encompass global navigation satellite systems (GNSS)/gyroscope - Micro Electromechanical-Sensor (MEMS) based solutions or comprise of the complex gear-based mechanical structure which results in latency and additive bias in the accumulative steering angle assessment. To address these issues, we propose a novel steering angle assessment system based on enhanced gear mechanism along with the adapted rotation paradigm for the customized self-driving vehicles. Additionally, a digital signal processing system has been introduced to resolve the issues in the identification of absolute central and max-bounding steering wheels position in self-driving vehicles. In assistance with the proposed mechanism, an algorithm has also been proposed to optimize the computed steering angle to minimalize the effect of additive bias in the accuracy. The proposed mechanism has been installed in the customized self-driving testbed vehicle and rigor validation has been performed in the straight and curvy road scenarios. Finally, the comparison study has been carried out between the conventional relative sensor and the proposed mechanism to show the accuracy and effectiveness of the proposed mechanism in terms of error rate, stability, and deviation. | Butt, Muhammad Atif; Riaz, Faisal; Khalid, Shehzad; Abid, Samia; Habib, Muhammad Asif; Shafique, Sarmad; Han, Kijun | Mirpur Univ Sci & Technol MUST, Dept Comp Sci & Informat Technol, Mirpur, Ajk, Pakistan; Bahria Univ, Dept Comp Engn, Islamabad, Pakistan; Natl Text Univ, Dept Comp Sci, Faisalabad, Pakistan; Kyungpook Natl Univ, Sch Comp Sci & Engn, Daegu 41566, South Korea | Khalid, Shehzad/MVY-3426-2025 | 57222118033; 36683243200; 26641180800; 57195214108; 35772504100; 57201288275; 7402963670 | kjhan@knu.ac.kr; | MEASUREMENT & CONTROL | MEAS CONTROL-UK | 0020-2940 | 2051-8730 | 54 | 3-4 | SCIE | AUTOMATION & CONTROL SYSTEMS;INSTRUMENTS & INSTRUMENTATION | 2021 | 1.648 | 69.5 | 0.3 | 2025-07-30 | 3 | 3 | Automated steering angle estimation; customized self-driving cars; MEMS; steering angle sensor | Automated steering angle estimation; customized self-driving cars; MEMS; steering angle sensor | Additives; Autonomous vehicles; Digital signal processing; Global positioning system; MEMS; Micro satellites; Steering; Vehicle wheels; Angular displacement sensors; Assessment system; Digital signal processing systems; Electro-mechanical sensors; Global Navigation Satellite Systems; Mechanical structures; Micro electro mechanical system; Steering systems; Automobile steering equipment | English | 2021 | 2021-03 | 10.1177/00202940211000076 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | A study on squeal noise reduction considering the pad shape of the disc brake system for urban railway vehicles | In this paper, to help reduce the squeal noise produced during the braking of urban railway vehicles, the shape of the disc brake pad was investigated to relieve contact stress. To analyze the disc brake system to identify the source of the squeal noise, a finite element model of the disc brake system was used, including the peripheral brake parts to increase accuracy. A complex eigenvalue analysis was performed to predict squeal noise generation. Verification was carried out using domestic urban railway field test results to confirm the accuracy of the analysis model. A pad shape that relieves contact stress is proposed to reduce squeal noise produced by nonuniform contact between the disc and pad. The results of this study can be utilized for future studies on squeal noise reduction. | Ahn, Seoyeon; Nam, Chanhyuk; Choi, Sungjin; An, Daekwon; Kim, Ingi; Seo, Kyungsoo; Sohn, Changhyun | Korea Automot Technol Inst, Cheonan, South Korea; Korea Automot Technol Inst, Vehicle Platform R&D Ctr, Cheonan, South Korea; Korea Automot Technol Inst, Convergence Technol R&D Ctr, Cheonan, South Korea; Sangsin Brake Co Ltd, Daegu, South Korea; KORAIL, Daejeon, South Korea; Seoul Metro, Seoul, South Korea; Kyungpook Natl Univ, Dept Mech Engn, Daegu, South Korea | 57206666580; 57206674741; 55736571100; 57206668502; 57223111227; 58711250700; 36806852600 | sjchoi@katech.re.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 35 | 5 | SCIE | ENGINEERING, MECHANICAL | 2021 | 1.81 | 69.7 | 0.38 | 2025-07-30 | 6 | 9 | Urban railway vehicle; Brake disc; Brake pad; Squeal noise; Complex eigenvalue analysis | Brake disc; Brake pad; Complex eigenvalue analysis; Squeal noise; Urban railway vehicle | Eigenvalues and eigenfunctions; Locomotives; Noise abatement; Railroad transportation; Railroads; Analysis models; Complex eigenvalue analysis; Contact Stress; Disc brake systems; Disc brakes; Field test; Squeal noise; Urban railway; Brakes | English | 2021 | 2021-05 | 10.1007/s12206-021-0410-x | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effective modulus of Si electrodes considering Li concentration, volume expansion, pore, and Poisson's ratio of Li-ion batteries | We propose a novel mathematical model for predicting the effective modulus of Si electrodes in Li-ion batteries by considering the large volume expansion of Si during lithiation and porosity variation, as well as the influence of change in Li-ion concentration and Poisson's ratio, assuming the Si electrode as a particulate composite material. Though previous studies considered the Li-ion concentration and Poisson's ratio in their models, they rarely considered the porosity and a large change in the volume of silicon, which degrade the performance of Liion batteries with Si electrodes. The proposed model is formulated on the basis of a threephase particulate composite material composed of silicon particles, pores, and binders. Through parametric studies, it is found that the Li-ion concentration in silicon increases nonlinearly and the Poisson's ratio decreases during charging, regardless of the structure (crystalline or amorphous) of the silicon particles. The effective modulus of the three-phase particulate composite electrode decreases during charging as a result of the changes in the Li-ion concentration, Si and binder volumes, pores, and Poisson's ratio. The accuracy of the developed model is validated by comparing the predicted moduli of this model with other 3 experimental data and 2 model predictions. | Lee, Jung-hoon; Kim, Cheol | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 57202584864; 55508786300 | kimchul@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 35 | 5 | SCIE | ENGINEERING, MECHANICAL | 2021 | 1.81 | 69.7 | 0.6 | 2025-07-30 | 9 | 9 | Effective modulus; Li-ion concentration; Silicon electrode; Porosity; Volumetric expansion | Effective modulus; Li-ion concentration; Porosity; Silicon electrode; Volumetric expansion | Amorphous silicon; Binders; Charging (batteries); Composite materials; Concentration (process); Electrodes; Expansion; Ions; Nanocrystalline materials; Porosity; Silicon; Effective moduli; Ion concentrations; Parametric study; Particulate composite material; Particulate composites; Porosity variations; Silicon particles; Volume expansion; Lithium-ion batteries | English | 2021 | 2021-05 | 10.1007/s12206-021-0427-1 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Fabrication of transparent homogeneous functionally graded materials and crack analysis by photoelasticity | To analyze the stress of functionally graded materials (FGMs) through an experiment, transparent homogeneous FGMs (THFGMs) with similar theoretical and physical properties need to be created. This study developed such THFGMs and proposed a method for determining their stress intensity factors (SIFs) and T-stresses via photoelastic experiments. The Young's modulus and Poisson's ratio of these THFGMs linearly change along the physical variation direction, and the shear modulus varies almost linearly. The SIFs and T-stresses were obtained for the central and edge cracks in finite rectangular FGM plates with linear variations in the shear modulus under constant density along the direction of the crack under mode I loading. The SIFs and T-stresses can be obtained using the exponential and linear variation in the stress fields, even if the physical properties of FGM plates show linear variation in the shear modulus. The characteristics of the experimental SIFs obtained in this study generally agree with those of theoretical SIFs reported in previous research. For center crack tips, the SIFs at the hard right crack tip were greater than those at the soft left crack tip. For edge crack tips, when a/W 0.35, the SIFs were greater than the homogeneous materials. The experimental T-stresses for the center crack agreed well with the numerical T-stresses reported in previous research. For the edge crack, when a/W = 0.4, considerable differences were observed between the experimental and numerical T-stresses. Where a(a) denotes the crack length for edge cracks or half the crack length for center cracks, and W is the width of the specimen. Experimental results coincide well with those reported in the literature, except for the T-stresses for edge crack when a/W > 0.3. Therefore, the THFGMs, which are new FGMs developed in this study, can be effectively used in experimental fracture analysis. | Lee, Kwang Ho; Kim, Bum Su; Kim, Ji Sik | Kyungpook Natl Univ, Sch Automot Engn, 2559 Gyeongsangdaero, Sangju 37224, Kyungbuk, South Korea; Kyungpook Natl Univ, Sch Nano & Adv Mat Engn, 2559 Gyeongsangdaero, Sangju 37224, Kyungbuk, South Korea | Kim, Jinkwon/AAR-6729-2021 | 56348794600; 57219909827; 16444690100 | khl@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 35 | 9 | SCIE | ENGINEERING, MECHANICAL | 2021 | 1.81 | 69.7 | 0.23 | 2025-07-30 | 4 | 4 | Transparent homogeneous functionally graded materials; Nonhomogeneous parameter; Stress and displacement fields; Crack tip stress intensity factor; T-stress; Photoelasticity; Stress fringe value | STRESS INTENSITY FACTORS; FRACTURE; COMPUTATION | Crack tip stress intensity factor; Nonhomogeneous parameter; Photoelasticity; Stress and displacement fields; Stress fringe value; T-stress; Transparent homogeneous functionally graded materials | Crack propagation; Elastic moduli; Functionally graded materials; Physical properties; Shear strain; Stress intensity factors; Center cracks; Constant density; Crack analysis; Edge crack tip; Fracture analysis; Homogeneous materials; Linear variation; Mode I loadings; Crack tips | English | 2021 | 2021-09 | 10.1007/s12206-021-0805-8 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Flow distribution of two-phase fluid through multiple microchannels | To enhance the heat transfer efficiency of multiple flow-passage heat exchangers (MFHE) used in various industrial fields, it is very important to evenly distribute the working fluid in each flow passage. The flow distribution of multiphase fluids has been mostly studied experimentally thus far because of its phenomenological complexity. In this study, a direct numerical analysis of the flow distribution of the liquid-vapor two-phase refrigerant in MFHEs was conducted. The two-phase flow distribution through the branched multiple microchannels was numerically simulated by using volume of fluid (VOF) interface tracking method. The proposed numerical procedure was successfully verified through comparison with prior experimental results for a horizontal header with 10 vertical branch tubes. The results showed satisfactory agreement. The intermittent inflow of liquid into the microchannels was revealed to play an important role in enhancing the two-phase flow distribution and preventing flow clogging in the microchannels. | Park, Jae Hyun; Park, Il Seouk | LG Elect, Home Appliance & Air Solut Co SAC QE Team, Chang Won 51554, South Korea; Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 57223873475; 50262800000 | einstein@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 35 | 6 | SCIE | ENGINEERING, MECHANICAL | 2021 | 1.81 | 69.7 | 0.38 | 2025-07-30 | 4 | 5 | Multiple flow-passage heat exchanger (MFHE); Two-phase flow; Flow distribution; Protrusion depth | WATER ANNULAR-FLOW; VOID FRACTION; HEADER; TUBES; PREDICTION | Flow distribution; Multiple flow-passage heat exchanger (MFHE); Protrusion depth; Two-phase flow | Heat exchangers; Heat transfer; Microchannels; Flow distribution; Heat transfer efficiency; Horizontal headers; Interface tracking method; Multiphase fluids; Multiple microchannels; Numerical procedures; Two-phase flow distribution; Two phase flow | English | 2021 | 2021-06 | 10.1007/s12206-021-0519-y | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Kinematic analysis of a hopper-type dibbling mechanism for a 2.6 kW two-row pepper transplanter | In this study, suitable dimensions were determined for the major design parameters of a gear-driven hopper-type dibbling mechanism using kinematic analysis, to achieve the required planting intervals and depths. The mechanism consists of three main parts: a primary arm, two connecting arms, and two dibbling hoppers. Based on the kinematic analysis, six candidate combinations of the arm length were derived from the recommended gear contact ratios. The most favorable combination for the dibbling mechanism was a 240-mm-long primary arm, 70-mm-long connecting arms, and 153-mm-long dibbling hoppers. The power consumption for the optimized dibbling mechanism was calculated to be 28.96 W without soil interaction, and measured as 40.91 W during transplanting. The mechanism provides a planting speed of 2 seedlings per second with seedling uprightness and planting success rate of 90 degrees +/- 3.26 degrees and 91.8 %, respectively. The optimized dibbling mechanism was demonstrated to quickly and accurately transplant seedlings with low power consumption, which makes it an attractive and economical option for mechanization of the pepper cultivation process. | Iqbal, Md Zafar; Islam, Md Nafiul; Ali, Mohammod; Kabir, Md Shaha Nur; Park, Tusan; Kang, Tae-Gyoung; Park, Kyu-Sik; Chung, Sun-Ok | Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77843 USA; Chungnam Natl Univ, Dept Agr Machinery Engn, Daejeon 34134, South Korea; Chungnam Natl Univ, Dept Smart Agr Syst, Daejeon 34134, South Korea; Hajee Mohammad Danesh Sci & Technol Univ, Dept Agr & Ind Engn, Dinajpur 5200, Bangladesh; Kyungpook Natl Univ, Dept Bioind Machinery Engn, Daegu 41566, South Korea; RDA, Dept Agr Engn, Natl Acad Agr Sci, Jeonju 54875, South Korea; Woojin Ind Co Ltd, Geumsan 32710, South Korea | Iqbal, Md Zafar/AAN-2567-2021; Islam, Md Nafiul/JVN-1638-2024; Kabir, Shaha/Q-9599-2019; Park, Tusan/C-2057-2012; Ali, Mohammod/LNQ-0207-2024 | 57213578034; 57218177002; 57603990100; 56425257300; 57202780408; 57218177140; 57223913772; 7404293469 | sochung@cnu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 35 | 6 | SCIE | ENGINEERING, MECHANICAL | 2021 | 1.81 | 69.7 | 1.2 | 2025-07-30 | 13 | 16 | Agricultural machinery; Dibbling mechanism; Kinematic analysis; Pepper; Transplanter | POT; DEVICE | Agricultural machinery; Dibbling mechanism; Kinematic analysis; Pepper; Transplanter | Electric power utilization; Hoppers; Kinematics; Machinery; Arm lengths; Cultivation process; Design parameters; Gear contact ratios; Kinematic Analysis; Low-power consumption; Soil interaction; Seed | English | 2021 | 2021-06 | 10.1007/s12206-021-0531-2 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Processes driving understory community dynamics in Ulleungdo Island broadleaved forest, South Korea | The development stage of forest trees has considerable impact on the understory plant species; however, little research has been dedicated to in-depth investigation of the changes in the ecological processes (deterministic and stochastic) over a mid-term observational period (>= 10 years). We analyzed the forest floor environment, including bare mineral soil, tree communities (density and biomass), understory plant species composition, diversity, cover, and changes in co-occurring species in the Albongbunji Basin on Ulleungdo Island over an 11-year period (2009-2019). The forest floor environment exhibited a broad spectrum of changes, beginning in the middle of the observation period and after heavy rainfall, and heavy sediment deposition events were observed. The overstory tree density showed patterns of a general increase and subsequent decline, and the overstory tree biomass increased and then remained steady. The heavy rainfall and sediment deposition as disturbance events also coincided with changes in species composition and the turnover rate of the understory plant communities, causing changes in major ecological processes. The general pattern of species co-occurrence (zeta diversity) was fitted to an exponential model, indicating the dominance of stochastic processes. The results show a shift in relative importance from deterministic to stochastic processes in the successional stages of understory plant community assembly over a mid-term observational period. | Jung, Songhie; Sim, Hyung Seok; Kim, Jun Soo; Bae, Kwan Ho; Cho, Yong-Chan | Natl Arboretum, Conservat Ctr Gwangneung Forest, Pochon 11186, South Korea; Kookmin Univ, Dept Forest Resources, Grad Sch, Seoul, South Korea; Nat & Forest Res Inst, Daegu, South Korea; Kyungpook Natl Univ, Dept Ecol Environm Syst, Sangju, South Korea | Cho, Yong/W-5338-2019; Kim, Jun/E-5034-2013 | 57196153364; 57219992750; 57221538968; 35108758200; 55268507800 | bz0288@korea.kr; | ECOLOGICAL RESEARCH | ECOL RES | 0912-3814 | 1440-1703 | 36 | 4 | SCIE | ECOLOGY | 2021 | 2.056 | 69.7 | 0 | 2025-07-30 | 0 | 0 | disturbance; Fagus engleriana; plant community; stochasticity; understory dynamics | LONG-TERM; HERBACEOUS LAYER; DISTURBANCE; DIVERSITY; STOCHASTICITY; BIODIVERSITY; SUCCESSION; VEGETATION; NICHE | disturbance; Fagus engleriana; plant community; stochasticity; understory dynamics | North Kyongsang; South Korea; Ulleung Island; Fagus engleriana; assembly rule; broad-leaved forest; coexistence; community dynamics; developmental stage; dominance; forest floor; species diversity; understory | English | 2021 | 2021-07 | 10.1111/1440-1703.12231 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Reliability-Based Design Optimization of a Permanent Magnet Motor Under Manufacturing Tolerance and Temperature Fluctuation | A reliability-based design optimization (RBDO) method is proposed to ensure a given confidence level of output performances of a permanent magnet motor in the presence of operating temperature fluctuation and manufacturing tolerance. To achieve the goal, first, probabilistic distributions of material properties of motor components are investigated in accordance with the variation in operational temperature. Then, random material parameters and random design variables due to both uncertainties are incorporated into a mathematical formulation of the RBDO, and an optimal design is sought out using the Monte Carlo simulation combined with a highly accurate surrogate model. An interior-type permanent magnet synchronous motor is provided to demonstrate the validity of the proposed method by comparison with the conventional method, which adopts a deterministic optimization technique in conjunction with a safety factor. | Mun, Jaegyeong; Lim, Jongsu; Kwak, Yejin; Kang, Byungsu; Choi, K. K.; Kim, Dong-Hun | Kyungpook Natl Univ, Dept Elect & Elect Engn, Daegu 41566, South Korea; Univ Iowa, Dept Mech & Ind Engn, Iowa City, IA 52242 USA | ; Choi, KK/B-1512-2008 | 57210103870; 57210123283; 57222317717; 57188662060; 7403949229; 57198637128 | dh29kim@ee.knu.ac.kr; | IEEE TRANSACTIONS ON MAGNETICS | IEEE T MAGN | 0018-9464 | 1941-0069 | 57 | 6 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;PHYSICS, APPLIED | 2021 | 1.848 | 69.8 | 0.8 | 2025-07-30 | 14 | 13 | Electromagnetics (EMs); optimization; reliability theory; robustness | Electromagnetics (EMs); optimization; reliability theory; robustness | Fits and tolerances; Machine design; Manufacture; Monte Carlo methods; Optimization; Permanent magnets; Probability distributions; Reliability; Safety factor; Temperature distribution; Deterministic optimization; Manufacturing tolerances; Mathematical formulation; Operational temperature; Permanent Magnet Synchronous Motor; Probabilistic distribution; Reliability-based design optimization; Temperature fluctuation; Electric motors | English | 2021 | 2021-06 | 10.1109/tmag.2021.3063161 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article; Data Paper | The Insect database in Dokdo, Korea: An updated version in 2020 | Background Dokdo, a group of islands near the East Coast of South Korea, comprises 89 small islands. These volcanic islands were created by an eruption that also led to the formation of the Ulleungdo Islands (located in the East Sea), which are approximately 87.525 km away from Dokdo. Dokdo is important for geopolitical reasons; however, because of certain barriers to investigation, such as weather and time constraints, knowledge of its insect fauna is limited compared to that of Ulleungdo. Until 2017, insect fauna on Dokdo included 10 orders, 74 families, 165 species and 23 undetermined species; subsequently, from 2018 to 2019, we discovered 23 previously unrecorded species and three undetermined species via an insect survey. New information As per our recent study, the database of insect species on Dokdo has been expanded to 10 orders, 81 families, 188 species and 23 undetermined species. This database has been registered in the Global Biodiversity Information Facility (GBIF; www.GBIF.org) and is the first record for insect fauna on Dokdo. | Ryu, Jihun; Kim, Young-Kun; Suh, Sang Jae; Choi, Kwang Shik | Kyungpook Natl Univ, Sch Life Sci, BK21 FOUR KNU Creat BioRes Grp, Daegu, South Korea; Kyungpook Natl Univ, Res Inst Dok Do & Ulleung Do Isl, Daegu, South Korea; Kyungpook Natl Univ, Sch Appl Biosci, Daegu, South Korea; Kyungpook Natl Univ, Res Inst Phylogen & Evolut, Daegu, South Korea | Ryu, Jihun/MSY-6008-2025 | 57210884178; 57222033782; 15754843200; 36602283400 | ksc@knu.ac.kr; | BIODIVERSITY DATA JOURNAL | BIODIVERS DATA J | 1314-2836 | 1314-2828 | 9 | SCIE | BIODIVERSITY CONSERVATION | 2021 | 1.55 | 70.0 | 1.04 | 2025-07-30 | 8 | 8 | biodiversity; Dokdo; insect fauna; newly-recorded species; insect database | HEMIPTERA HETEROPTERA MIRIDAE; ISLAND; BIODIVERSITY; GENUS; DIPTERA; RECORDS | biodiversity; Dokdo; insect database; insect fauna; newly-recorded species | biodiversity; database; insect; morphology; new record; new species | English | 2021 | 2021-01-26 | 10.3897/bdj.9.e62011 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | Delays in the Management of Patients with Acute Ischemic Stroke during the COVID-19 Outbreak Period: A Multicenter Study in Daegu, Korea | Background. Timely treatment is important for patients with acute ischemic stroke (AIS). However, the coronavirus disease 2019 (COVID-19) outbreak may have caused delays in patient management. Therefore, we analyzed the prognosis and the time spent at the prehospital and hospital stages in managing patients diagnosed with AIS during the COVID-19 outbreak. Methods. This retrospective study evaluated patients diagnosed with AIS in the emergency department (ED) at five medical centers in Daegu city between February 18 and April 17 each year from 2018 to 2020. Data on the patients' clinical features and time spent on management were collected and compared according to COVID-19 and pre-COVID-19 summaries. Results. From a total of 533 patients diagnosed with AIS, 399 patients visited the ED before COVID-19 and 134 during the COVID-19 outbreak During the COVID-19 outbreak, compared with pre-COVID-19, AIS patients had poor National Institute of Health Stroke Scale scores at the initial hospital visit (6 vs. 4, p = 0.013) and discharge (3 vs. 2, p = 0.001). During the COVID-19 outbreak, the proportion of direct visits to hospitals through public emergency medical services (EMS) increased, and the onset of symptoms-to-ED door time via the public EMS was delayed (87 min vs. 68 min, p = 0.006). Conclusions. The prognosis of AIS patients during the COVID-19 outbreak was worse than that of pre-COVID-19 patients with delays at the prehospital stage, despite the need for timely care. | Lee, Sang-Hun; Mun, You Ho; Ryoo, Hyun Wook; Jin, Sang-Chan; Kim, Jung Ho; Ahn, Jae Yun; Jang, Tae Chang; Moon, Sungbae; Lee, Dong Eun; Park, Hyungjong | Keimyung Univ, Dongsan Med Ctr, Dept Emergency Med, Daegu 42601, South Korea; Yeungnam Univ, Coll Med, Dept Emergency Med, Daegu 42415, South Korea; Kyungpook Natl Univ, Sch Med, Dept Emergency Med, Daegu 41944, South Korea; Daegu Catholic Univ, Sch Med, Dept Emergency Med, Daegu 42472, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Sch Med, Dept Emergency Med, Daegu 41404, South Korea; Keimyung Univ, Dongsan Med Ctr, Dept Neurol, Daegu 42601, South Korea | Kim, Jungho/LDE-9088-2024; Park, Hyungjong/AAI-5361-2020; Ahn, Jae Yun/N-2652-2017; Kim, Jung Ho/LDE-9088-2024; Lee, Dong Eun/HTN-4501-2023 | saorang7@naver.com;zezec@naver.com;ryoo@knu.ac.kr;jchan98@hanmail.net;jhkimem@naver.com;jyahn@knu.ac.kr;emzzang@cu.ac.kr;snbaem@gmail.com;delee@knu.ac.kr;hjpark209042@gmail.com; | EMERGENCY MEDICINE INTERNATIONAL | EMERG MED INT | 2090-2840 | 2090-2859 | 2021 | SCIE | EMERGENCY MEDICINE | 2021 | 1.621 | 70.3 | 14 | HEALTH-CARE PROFESSIONALS | English | 2021 | 2021-03-24 | 10.1155/2021/6687765 | 바로가기 | 바로가기 | 바로가기 | |||||||||||
| ○ | ○ | Article | Ethanol Extracts of Yacon and Ginger in Diet of Juvenile Olive Flounder (Paralichthys olivaceus): Effect on Growth, Feed Utilization, Body Composition, Plasma Chemistry and Challenge Test against Vibrio anguillarum | Development of natural immunostimulants as dietary additive keeps receiving scientist's interest and administration of ethanol extract of additive is one of the effective methods to concentrate their bioactive compounds to improve their effects. Dietary inclusion effect of ethanol extracts of yacon and ginger on growth, feed utilization, body composition, plasma chemistry of fish and challenge test against Vibrio anguillarum compared to a commercial probiotic (Super lacto (R)) was determined. Three hundred and sixty juvenile fish were distributed into 12, 50 L flowthrough tanks. Four experimental diets were prepared. Additive-free basal diet was served as the control (CON) diet. The 1% ethanol extracts of yacon and ginger, and 0.5% Super lacto (R) were included into the CON diet, referred to as the YCE, GGE and SUP diets, respectively. Each diet was hand-fed to triplicate groups of fish for 8 weeks. After the 8-week feeding trial, fish were injected with V. anguillarum and survival was monitored for the next 7 days. Dietary additives did not affect weight gain, feed utilization, whole body composition and plasma parameters of fish. Survival of fish fed the YCE and GGE diets was significantly higher than that of the fish fed the CON and SUP diets at the end of the 7-day post observation. Ethanol extracts of yacon and ginger can be effectively used as natural immunostimulants for olive flounder at occurrence of V. anguillarum. | Yin, Lei Li; Cho, Sung Hwoan; Park, Seung-Chun; Kwon, Mun-Gyeong | Korea Maritime & Ocean Univ, Div Marine Biosci, Busan 49112, South Korea; Kyungpook Natl Univ, Coll Vet Med, Daegu 41566, South Korea; Natl Inst Fisheries Sci, Aquat Dis Control Div, Busan 46083, South Korea | ; Park, Seung-Chun/AAV-3388-2021 | 59598552800; 36088867600; 7501832396; 36508778600 | chosunh@kmou.ac.kr; | TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES | TURK J FISH AQUAT SC | 1303-2712 | 2149-181X | 21 | 6 | SCIE | FISHERIES;MARINE & FRESHWATER BIOLOGY | 2021 | 1.423 | 70.4 | 0.79 | 2025-07-30 | 6 | 7 | Phytic-additive; Olive flounder (Paralichthys olivaceus); Vibrio anguillarum; Immunostimulants | ZINGIBER-OFFICINALE ROSCOE; HERBS IMPROVE GROWTH; PROTEIN REQUIREMENT; IMMUNE-RESPONSE; STRESS RECOVERY; GREEN TEA; PERFORMANCE; FISH; AQUACULTURE; INCLUSION | Olive flounder (Paralichthys olivaceus); Phytic-additive; Vibrio anguillarum Immunostimulants | English | 2021 | 2021-06 | 10.4194/1303-2712-v21_6_01 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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