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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 | Developing a Cantilever-type Near-field Scanning Optical Microscope Using a Single Laser for Topography Detection and Sample Excitation | The capabilities of the near-field scanning optical microscope (NSOM) for obtaining high resolution lateral topographical images as well as for mapping the spectroscopic and optical properties of a sample below the diffraction limit of light have made it an attractive research field for most researchers dealing with optical characteristics of materials in nano scales. The apertured NSOM technique involves confining light into an aperture of sub-wavelength size and using it to illuminate a sample maintained at a distance equal to a fraction of the sub-wavelength aperture (near-field region). In this article, we present a setup for developing NSOM using a cantilever with a sub-wavelength aperture at the tip. A single laser is used for both cantilever deflection measurement and near-field sample excitation. The laser beam is focused at the apex of the cantilever where a portion of the beam is reflected and the other portion goes through the aperture and causes local near-field optical excitation of the sample, which is then raster scanned in the near-field region. The reflected beam is used for an optical beam deflection technique that yields topographical images by controlling the probe-sample in nano-distance. The fluorescence emissions signal is detected in far-field by the help of a silicon avalanche photodiode. The images obtained using this method show a good correlation between the topographical image and the mapping of the fluorescence emissions. | Ng'ang'a, Douglas Kagoiya; Ali, Luqman; Lee, Yong Joong; Byeon, Clare Chisu | Kyungpook Natl Univ, Dept Mech Engn, Daegu 41566, South Korea | ALI, LUQMAN/LDF-2311-2024 | byeon@knu.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 3 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0 | Aperture near-field scanning optical microscope; Cantilever-type near-field scanning optical microscope; Fluorescence spectroscopy; Near-field excitation; Optical beam deflection | PROBES; RESOLUTION | English | 2021 | 2021-06 | 10.3807/copp.2021.5.3.229 | 바로가기 | 바로가기 | 바로가기 | |||||||||
| ○ | ○ | Article | Diffractive Optical Element for Noise-reduced Beam Shaping of Multi-array Point Light Source | An arrayed diffractive optical element design for the beam-shaping of a multi-array light source is proposed. This is an essential device for recent optical security and face recognition applications. In practice, we devise a DC noise reduction technique featuring high fabrication error tolerance regarding the multi-array light source diffractive optical elements, as a necessary part of the proposed design method. The spherical diverging illumination leads to DC-conjugate noise spreading. The main idea is tested experimentally, and the multi-array light source diffraction pattern is investigated numerically. | Lee, Jonghyun; Hahn, Joonku; Kim, Hwi | Korea Univ Sejong Campus, Dept Elect & Informat Engn, Sejong 30019, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57201265019; 10142501600; 8933596300 | hwikim@korea.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 5 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0.44 | 2025-07-30 | 3 | 5 | Diffractive optical element; Incoherent beam shaping; Noise management | DISPLAY; DESIGN | Diffractive optical element; Incoherent beam shaping; Noise management | Density (optical); Diffractive optical elements; Face recognition; Light; Beam-shaping; DC noise; Diffractive optical element; Diffractive optical elements designs; Incoherent beam shaping; Incoherent beams; Multi arrays; Noise management; Optical security; Point light source; Noise abatement | English | 2021 | 2021-10 | 10.3807/copp.2021.5.5.506 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Fourier Modal Method for Optical Dipole Radiation in Photonic Structures | An extended Fourier modal method (FMM) for optical dipole radiation in three-dimensional photonic structures is proposed. The core elements of the proposed FMM are the stable bidirectional scatteringmatrix algorithm for modeling internal optical emission, and a novel optical-dipole-source model that prevents numerical errors induced by the Gibbs phenomenon. Through the proposed scheme, the FMM is extended to model a wide range of source-embedded photonic structures. | Park, Sungjae; Hahn, Joonku; Kim, Hwi | Korea Univ, Dept Elect & Informat Engn, Sejong Campus, Sejong 30019, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57193380068; 10142501600; 8933596300 | hwikim@korea.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 6 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0.18 | 2025-07-30 | 2 | 2 | Fourier modal method; Numerical modeling | SCATTERING-MATRIX METHOD | Fourier modal method; Numerical modeling | Fourier transforms; Modal analysis; Core elements; Dipole radiations; Dipole sources; Fourier-modal methods; Optical dipoles; Optical emissions; Photonic structure; Scattering matrix; Source models; Three dimensional photonic structures; Numerical methods | English | 2021 | 2021-12 | 10.3807/copp.2021.5.6.597 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | GPU-based Monte Carlo Photon Migration Algorithm with Path-partition Load Balancing | A parallel Monte Carlo photon migration algorithm for graphics processing units that implements an improved load-balancing strategy is presented. Conventional parallel Monte Carlo photon migration algorithms suffer from a computational bottleneck due to their reliance on a simple load-balancing strategy that does not take into account the different length of the mean free paths of the photons. In this paper, path-partition load balancing is proposed to eliminate this computational bottleneck based on a mathematical formula that parallelizes the photon path tracing process, which has previously been considered non-parallelizable. The performance of the proposed algorithm is tested using three-dimensional photon migration simulations of a human skin model. | Jeon, Youngjin; Park, Jongha; Hahn, Joonku; Kim, Hwi | Korea Univ, Dept Elect & Informat Engn, Sejong Campus, Sejong 30019, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57193385596; 57200103492; 10142501600; 8933596300 | hwikim@korea.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 6 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0 | 2025-07-30 | 0 | 0 | Blood vessel Graphics Proccesing Unit Monte Carlo Method Numerical modeling Scattering | NET ANALYTE SIGNAL | Blood vessel; Graphics Proccesing Unit; Monte Carlo Method; Numerical modeling; Scattering | Blood vessels; Graphics processing unit; Numerical methods; Photons; Program processors; Three dimensional computer graphics; Computational bottlenecks; Graphic proccesing unit; Load balancing strategy; Load-Balancing; Mean-free path; Migration algorithms; MonteCarlo methods; Parallel Monte Carlo; Photon Migration; Simple++; Monte Carlo methods | English | 2021 | 2021-12 | 10.3807/copp.2021.5.6.617 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Parallel Synthesis Algorithm for Layer-based Computer-generated Holograms Using Sparse-field Localization | We propose a high-speed layer-based algorithm for synthesizing computer-generated holograms (CGHs), featuring sparsity-based image segmentation and computational parallelism. The sparsity-based image segmentation of layer-based three-dimensional scenes leads to considerable improvement in the efficiency of CGH computation. The efficiency enhancement of the proposed algorithm is ascribed to the field localization of the fast Fourier transform (FFT), and the consequent reduction of FFT computational complexity. | Park, Jongha; Hahn, Joonku; Kim, Hwi | Korea Univ, Dept Elect & Informat Engn, Sejong 30019, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | 57200103492; 10142501600; 8933596300 | hwikim@korea.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 6 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0 | 2025-07-30 | 0 | 0 | Diffractive optics; Digital holography; Fast algorithms; Localization | FRINGE PATTERN | Diffractive optics; Digital holography; Fast algorithms; Localization | Computational efficiency; Computer generated holography; Efficiency; Fast Fourier transforms; Holograms; Image enhancement; Image segmentation; Computergenerated holograms (CGH); Digital holography; Fast algorithms; Field localization; High Speed; Images segmentations; Localisation; Parallel synthesis; Synthesis algorithms; Three-dimensional scenes; Electron holography | English | 2021 | 2021-12 | 10.3807/copp.2021.5.6.672 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Scalar Fourier Modal Method for Wave-optic Optical-element Modeling | A scalar Fourier modal method for the numerical analysis of the scalar wave equation in inhomoge-neous space with an arbitrary permittivity profile, is proposed as a novel theoretical embodiment of Fou-rier optics. The modeling of devices and systems using conventional Fourier optics is based on the thin-element approximation, but this approach becomes less accurate with high numerical aperture or thick optical elements. The proposed scalar Fourier modal method describes the wave optical characteristics of optical structures in terms of the generalized transmittance function, which can readily overcome a current limitation of Fourier optics. | Kim, Soobin; Hahn, Joonku; Kim, Hwi | Korea Univ Sejong Campus, Dept Elect & Informat Engn, Sejong 30019, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57193391934; 10142501600; 8933596300 | hwikim@korea.ac.kr; | CURRENT OPTICS AND PHOTONICS | CURR OPT PHOTONICS | 2508-7266 | 2508-7274 | 5 | 5 | SCIE | OPTICS | 2021 | 0.879 | 89.6 | 0.18 | 2025-07-30 | 1 | 2 | Electromagnetic theory; Fourier modal method; Numerical modeling | LIGHT-PROPAGATION | Electromagnetic theory; Fourier modal method; Numerical modeling | Electric fields; Fourier transforms; Modal analysis; Devices and systems; Electromagnetic theories; Element models; Fourier-modal methods; High numerical apertures; Optical characteristics; Optical structures; Permittivity profiles; Scalar-wave equations; Wave optics; Numerical methods | English | 2021 | 2021-10 | 10.3807/copp.2021.5.5.491 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | A Critical Zooming in on the Fast Fashion Industry: Focusing on the Documentary Films The True Cost (2015) and RiverBlue (2017) | This paper investigates the problems in the global fashion industry relating to environmental pollution and the intensification of gender inequality in developing countries as portrayed in two films: The True Cost (2015) and RiverBlue (2017). These documentary films depict the effect of the current fashion industry, which revolves around various financial interests, on people in developing countries and on the planet as a whole. By considering aspects of these films’ social role, function and influence, this paper takes a close look at how these films bring these serious universal issues to the screen, paying particular attention to its analysis of the many correlating aspects between environmental pollution and gender inequality as seen through these films. Both documentary films, as acting media, depict the social problems analyzed in this paper in an attempt to convey objectified truth and thereby demand change from the audience. They encourage participation in social improvement by communicating a message that uses the imagery in and popularity of the film medium to reach the widest possible audience. Additionally, they attempt to engage society in social change using the reality-oriented production methods characteristic to documentary films, resulting in a corresponding visible impact. © 2021, Research Institute of Asian Women. All rights reserved. | Sung, Kyoung-Suk | Kyungpook National University, South Korea | 57204527641 | ksung@knu.ac.kr; | Asian Women | ASIAN WOMEN | 1225-925X | 2586-5714 | 37 | 4 | SSCI | WOMENS STUDIES | 2021 | 0.488 | 89.8 | 0 | 2025-07-30 | 0 | Documentary; Fast fashion; RiverBlue (2017); Socio-critical film; Sweatshop; The True Cost (2015) | English | Final | 2021 | 10.14431/aw.2021.12.37.4.49 | 바로가기 | 바로가기 | 바로가기 | ||||||||
| ○ | ○ | Article | The Impact of Compassion Fatigue on the Well-Being of Oncology Social Workers in Korea | This study explored the impacts of compassion fatigue on social workers working with oncology patients. The purposive sample featured 12 medical social workers providing psychosocial care in hospitals to oncology patients in Korea. Based on in-depth interviews on the effects of compassion fatigue, the following main themes emerged: (a) personal well-being (negative physical symptoms, feeling dejected, rumination, guilt and regret, excessive concern about health, and overwhelmed by sadness); (b) work (losing a sense of purpose, emotionally unavailable, avoiding clients, and feeling demotivated); (c) coming to terms with compassion fatigue (learning to manage compassion fatigue and recognizing helpful strategies); and (d) transforming the impact of compassion fatigue (change in life perspective, finding strength in life and self, and becoming humble). This study informs readers of the development of interventions to counter the negative consequences of compassion fatigue. Future research should focus on further understanding about how oncology social workers develop and cope with compassion fatigue, with an emphasis on the experiences of those with different characteristics and available resources. | Kim, Min Ah; Yi, Jaehee; Molloy, Jen; Choi, Kwonho | Sungkyunkwan Univ, Dept Social Welf, 25-2 Sungkyunkwan Ro, Seoul 03063, South Korea; Univ Utah, Coll Social Work, Salt Lake City, UT USA; Univ Montana, Sch Social Work, Missoula, MT 59812 USA; Kyungpook Natl Univ, Sch Social Welf, Daegu, South Korea | ; Yi, Jaehee/A-2731-2010 | 55966004600; 24402245900; 57195559294; 57200582649 | minahkim@skku.edu; | JOURNAL OF SOCIAL SERVICE RESEARCH | J SOC SERV RES | 0148-8376 | 1540-7314 | 47 | 5 | SSCI | SOCIAL WORK | 2021 | 1.193 | 89.8 | 0.13 | 2025-07-30 | 6 | 3 | Oncology; medical social worker; compassion fatigue; Korea | compassion fatigue; Korea; medical social worker; Oncology | English | 2021 | 2021-09-03 | 10.1080/01488376.2020.1869140 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Brain F-18 FDG and F-18 FP-CIT PET/CT Findings of c.856₈₆₀dₑₗCTCTA Mutation McLeod Syndrome | McLeod syndrome is a rare X-linked recessive genetic disorder that is caused by mutations of the XK gene. It is one of the core neuroacanthocytosis syndromes. We report the case of a 67-year-old man who presented to Kyungpook National University Hospital in the Republic of Korea with progressive worsening of generalized chorea and dystonia. He had no recognized family history of neurologic illness. A peripheral blood smear showed increased acanthocytes. His serum creatine kinase levels were 894 U/L. A brain MRI showed atrophy of the bilateral striatal nuclei. An F-18 F-N-(3-fluoropropyl)-2 beta-carboxymethoxy-3 beta-(4-iodophenyl) nortropane PET/CT showed moderately decreased dopamine transporter uptake in the putamen and severely decreased uptake in the caudate nucleus. An F-18 fludeoxyglucose PET/CT demonstrated markedly decreased metabolism at the caudate nucleus and the putamen. Whole exome sequencing revealed hemizygous pathogenic mutations of the XK gene (c.856₈₆₀dₑₗCTCTA;p.Leu286TyrfsTer16). We believe that these findings provide useful information regarding the clinical features of individuals with McLeod syndrome. | Ryu, Ho-Sung; Hong, Chae Moon | Kyungpook Natl Univ Hosp, Dept Neurol, Daegu, South Korea; Kyungpook Natl Univ Hosp, Dept Nucl Med, 130 Dongduk Ro, Daegu 41944, South Korea | 57014206500; 37050876700 | cmhong@knu.ac.kr; | COGNITIVE AND BEHAVIORAL NEUROLOGY | COGN BEHAV NEUROL | 1543-3633 | 1543-3641 | 34 | 3 | SCIE | BEHAVIORAL SCIENCES;CLINICAL NEUROLOGY | 2021 | 1.59 | 89.9 | 0.19 | 2025-07-30 | 2 | 2 | McLeod syndrome; neuroacanthocytosis; FP-CIT; dopamine transporter; FDG | CHOREA; NEUROACANTHOCYTOSIS | dopamine transporter; FDG; FP-CIT; McLeod syndrome; neuroacanthocytosis | aripiprazole; ceruloplasmin; clonazepam; creatine kinase; dopamine; dopamine transporter; etiracetam; ferritin; fluorodeoxyglucose f 18; haloperidol; lactate dehydrogenase; levetiracetam; levothyroxine; myoglobin; olanzapine; parkin; valproic acid; acanthocytosis; aged; Article; blood cell count; blood smear; case report; caudate nucleus; chromosome 4p; clinical article; clinical feature; cognitive defect; controlled study; creatine kinase blood level; diagnostic test accuracy study; dystonia; echocardiography; ferritin blood level; gene; gene mutation; genetic analysis; genetic disorder; genetic transfection; glucose blood level; human; human cell; human tissue; Huntington chorea; involuntary movement; Korea; male; McLeod syndrome; Mini Mental State Examination; Montreal cognitive assessment; motor dysfunction; muscle atrophy; neuroacanthocytosis; neuropsychological test; nuclear magnetic resonance imaging; palliative therapy; parkinsonism; positron emission tomography-computed tomography; protein expression; putamen; seizure; thyroid function; transthoracic echocardiography; trinucleotide repeat; whole exome sequencing; XK gene | English | 2021 | 2021-09 | 10.1097/wnn.0000000000000267 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | LLC inverter design for driving surface DBD optimized for airborne bacteria inactivation | This paper proposes a design for an LLC resonant inverter with reflecting plasma characteristics to improve indoor air quality. A surface dielectric barrier discharge (SDBD) helps improve indoor air quality since it effectively inactivates airborne bacteria. By collaborating with plasma physics and power electronics, this study electrically models the SDBD structure. Thus, it presents a compact and commercially viable plasma generation circuit to drive the SDBD feature. The traditional LLC inverter design procedure is not optimized for such an application due to utilization differences. An LLC resonant inverter operating in the resonant mode combined with a step-up transformer is optimally designed to generate a 4-kV(pk-pk), 7.8-kHz sinusoidal voltage with a total power consumption of less than 2.5 W. By investigating optical emission spectroscopy (OES), the production of a reactive species for the inactivation of airborne bacteria is confirmed. Furthermore, the sterilization performance is tested by observing the removal rate of the Staphylococcus epidermidis (S. epidermidis) bacteria inside a 1 m(3) chamber. | Kim, Yeong Woon; Wellawatta, Thusita Randima; Choi, Sung-Jin; Choi, Jun | Korea Inst Ind Technol, Adv Forming Proc R&D Grp, Ulsan, South Korea; Kyungpook Natl Univ, Coll IT Engn, Sch Elect & Elect Engn, Daegu, South Korea; Univ Ulsan, Dept Elect Elect & Comp Engn, Ulsan, South Korea | 57312198300; 57188822215; 7408120164; 12793749200 | junchoi@kitech.re.kr; | JOURNAL OF POWER ELECTRONICS | J POWER ELECTRON | 1598-2092 | 2093-4718 | 21 | 12 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 0.913 | 90.0 | 0.2 | 2025-07-30 | 3 | 3 | LLC inverter; Plasma generation; Surface dielectric barrier discharge; Sterilization; Airborne bacteria | BARRIER DISCHARGE DBD; PLASMA; STERILIZATION; OXYGEN; AIR | Airborne bacteria; LLC inverter; Plasma generation; Sterilization; Surface dielectric barrier discharge | Air quality; Design; Dielectric devices; Dielectric materials; Electric discharges; Electric inverters; Flow control; Optical emission spectroscopy; Plasma applications; Sterilization (cleaning); Airborne bacteria; Bacteria inactivation; Indoor air quality; LLC inverte; Plasma characteristics; Plasma generation; Plasma physics; Resonant inverters; Surface DBD; Surface dielectric barrier discharge; Bacteria | English | 2021 | 2021-12 | 10.1007/s43236-021-00321-w | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | New control strategy for interleaved PFC rectifiers using Lyapunov function | The conventional current and voltage control methods of AC/DC power factor correction (PFC) rectifiers have been applied using proportional-integral (PI) or proportional-resonant controls. However, these approaches do not guarantee global stability at various operating points and are sensitive to disturbances, such as parameter or load variations. In this paper, a new control method is proposed based on the Lyapunov function that provides global stability and a fast response at various operating points. Experiments are conducted using an air conditioner with a 3 kW capacity. Experimental results are obtained and thoroughly analyzed. | Kim, Ill-Uk; Bae, Byung-Kwan; Choi, Jong-Woo | LG Elect, Home Appliance & Air Solut H&A Control Res Lab, Chang Won, South Korea; Kyungpook Natl Univ, Dept Elect Engn, Sch Elect & Elect Engn, Daegu, South Korea | Choi, Jong-Woo/AAI-3011-2020 | 57221392513; 57221389830; 56087993500 | cjw@knu.ac.kr; | JOURNAL OF POWER ELECTRONICS | J POWER ELECTRON | 1598-2092 | 2093-4718 | 21 | 2 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 0.913 | 90.0 | 0.07 | 2025-07-30 | 0 | 1 | Interleaved PFC; Lyapunov function based control; PI controller; Nonlinear control | Interleaved PFC; Lyapunov function based control; Nonlinear control; PI controller | Air conditioning; Electric power factor correction; Electric rectifiers; Lyapunov functions; Two term control systems; Control methods; Control strategies; Conventional currents; Global stability; Operating points; Power factor correction (PFC) rectifiers; Proportional integral; Proportional-resonant controls; Rectifying circuits | English | 2021 | 2021-02 | 10.1007/s43236-020-00202-8 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Robust voltage model flux estimator design with parallel vector compensator for sensorless drive of induction motors | Flux estimator (FE) is critical for achieving high-performance sensorless drive of induction motors. A voltage model (VM) is an excellent candidate for a FE since it does not require speed information and has a simple structure. A VM using a closed-loop style has excellent sensorless drive capability over a wide speed range. However, it is limited by the uncertainties such as offset and parameter mismatch. This paper presents an improved a closed-loop style FE. To overcome the problems inherent in the conventional FE, a hybrid strategy for the changeover between control modes is applied. In the setting of the FE's cutoff frequency (CF), the influences of the offset and parameter mismatch are analyzed. The phase distortion and acquisition of the back electromotive force are also analyzed. From this analysis, a vector compensation strategy for the flux linkage is applied. This strategy facilitates the CF setting, which improves the robustness against both the offset and parameter mismatch. Finally, the effectiveness of the proposed FE in a sensorless driven induction motor is verified using simulations and experiments under various conditions. | Jo, Gwon-Jae; Choi, Jong-Woo | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Dept Elect Engn, Daegu, South Korea | Jo, Gwonjae/GYV-0312-2022; Choi, Jong-Woo/AAI-3011-2020 | 57201365205; 56087993500 | cjw@knu.ac.kr; | JOURNAL OF POWER ELECTRONICS | J POWER ELECTRON | 1598-2092 | 2093-4718 | 21 | 1 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 0.913 | 90.0 | 0.14 | 2025-07-30 | 2 | 2 | Cutoff frequency (CF); Induction motor; Sensorless drive; Flux estimator (FE); Voltage model (VM); Back electromotive force (back-EMF) | DIRECT TORQUE CONTROL; ORIENTATION CONTROL; FIELD-ORIENTATION; OBSERVER; STATOR; INTEGRATOR | Back electromotive force (back-EMF); Cutoff frequency (CF); Flux estimator (FE); Induction motor; Sensorless drive; Voltage model (VM) | Cutoff frequency; Electric machine theory; Back electromotive force; Compensation strategy; Hybrid strategies; Parameter mismatches; Phase distortions; Simple structures; Speed information; Wide speed range; Induction motors | English | 2021 | 2021-01 | 10.1007/s43236-020-00149-w | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Sevoflurane modulation of tetrodotoxin-resistant Na⁺ channels in small-sized dorsal root ganglion neurons of rats | Objective Volatile anesthetics are widely used for general anesthesia during surgical operations. Voltage-gated Na+ channels expressed in central neurons are major targets for volatile anesthetics; but it is unclear whether these drugs modulate native tetrodotoxin-resistant (TTX-R) Na+ channels, which are involved in the development and maintenance of inflammatory pain. Methods In this study, we examined the effects of sevoflurane on TTX-R Na+ currents (I-Na) in acutely isolated rat dorsal root ganglion neurons, using a whole-cell patch-clamp technique. Results Sevoflurane slightly potentiated the peak amplitude of transient TTX-R I-Na but more potently inhibited slow voltage-ramp-induced persistent I-Na in a concentration-dependent manner. Sevoflurane (0.86 +/- 0.02 mM) (1) slightly shifted the steady-state fast inactivation relationship to hyperpolarizing ranges without affecting the voltage-activation relationship, (2) reduced the extent of use-dependent inhibition of Na+ channels, (3) accelerated the onset of inactivation and (4) delayed the recovery from inactivation of TTX-R Na+ channels. Thus, sevoflurane has diverse effects on TTX-R Na+ channels expressed in nociceptive neurons. Conclusions The present results suggest that the inhibition of persistent I-Na and the modulation of the voltage dependence and inactivation might be, at least in part, responsible for the analgesic effects elicited by sevoflurane. | Kim, Gimin; Nakamura, Michiko; Cho, Jin-Hwa; Nam, Soonhyeun; Jang, Il-Sung | Kyungpook Natl Univ, Dept Pediat Dent, Sch Dent, Daegu, South Korea; Kyungpook Natl Univ, Dept Pharmacol, Sch Dent, 2177 Dalgubeol Daero, Daegu 41940, South Korea; Kyungpook Natl Univ, Brain Sci & Engn Inst, Daegu, South Korea | 57210885969; 36051866000; 24167566000; 57376200600; 7102177910 | jis7619@knu.ac.kr; | NEUROREPORT | NEUROREPORT | 0959-4965 | 1473-558X | 32 | 17 | SCIE | NEUROSCIENCES | 2021 | 1.703 | 90.0 | 0 | 2025-07-30 | 0 | 0 | Na+ channels; nociceptive neurons; patch-clamp; sevoflurane; volatile anesthetics | SODIUM-CHANNELS; GENERAL-ANESTHETICS; INHALED ANESTHETICS; PAIN; ISOFLURANE; CURRENTS | Na<sup>+</sup> channels; nociceptive neurons; patch-clamp; sevoflurane; volatile anesthetics | Anesthetics, Inhalation; Animals; Ganglia, Spinal; Membrane Potentials; Neurons; Nociceptors; Patch-Clamp Techniques; Rats; Sevoflurane; Sodium Channels; Tetrodotoxin; Voltage-Gated Sodium Channels; inhalation anesthetic agent; sevoflurane; sodium channel; tetrodotoxin; voltage gated sodium channel; animal; cytology; drug effect; membrane potential; metabolism; nerve cell; pain receptor; patch clamp technique; rat; spinal ganglion | English | 2021 | 2021-12-08 | 10.1097/wnr.0000000000001731 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Switching cell structured direct AC-AC converter-based three-phase DVR system using interphase voltage | This paper presents a dynamic voltage restorer to solve the voltage sag problem that causes the most serious economic loss among various grid accidents. The proposed method, which uses a direct AC-AC converter, consists of a simple controller unlike methods using a voltage source inverter that is controlled using complex operations. Unlike the energy storage type, there is no additional energy storage device, which reduces system cost. In addition, unlike the back-to-back type, energy conversion loss is reduced by one stage conversion. A switching cell-structured direct AC-AC converter that solves the rectification problem without a separate sensor is a reliable structure that reduces the volumes of the passive filters by increasing the switching frequency. In addition, using interphase voltages, it can take a wide range of voltage compensations to compensate for most of the voltage sag in various situations. In this paper, the background of the study is revealed and the operating principles and control schemes of the proposed system are analyzed. Then, the validity of this study is confirmed through simulation and experiment results. | Lee, Hyeongmin; Kim, Sanghun; Cha, Honnyong; Kim, Heung-Geun | Kyungpook Natl Univ, Dept Elect Engn, Daegu, South Korea; Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32306 USA; Kyungpook Natl Univ, Sch Energy Engn, Daegu, South Korea | Kim, sanghun/ABD-3540-2021 | 55368916800; 57188627890; 24450248400; 7410122126 | kimhg@knu.ac.kr; | JOURNAL OF POWER ELECTRONICS | J POWER ELECTRON | 1598-2092 | 2093-4718 | 21 | 7 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 0.913 | 90.0 | 0.2 | 2025-07-30 | 3 | 4 | Dynamic voltage restorer; Voltage sag; Switching cell; Direct AC– AC converter; Interphase; Power quality | SAG; TOPOLOGIES; DETECTOR | Direct AC–AC converter; Dynamic voltage restorer; Interphase; Power quality; Switching cell; Voltage sag | Electric inverters; Energy conversion; Energy storage; Losses; Passive filters; Switching frequency; Voltage regulators; Complex operations; Control schemes; Dynamic voltage restorer (DVR); Economic loss; Operating principles; Switching cells; Voltage compensation; Voltage source inverter; Electric rectifiers | English | 2021 | 2021-07 | 10.1007/s43236-021-00254-4 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | A variational approach to irreversible thermodynamics | We derived a general Onsager variational principle in an intuitive and simple manner. Our variational method is similar to the Gauss principle of least constraint rather than the principle of least action. Our result becomes the original Onsager principle if dissipation function is a quadratic function of fluxes and sources. Our result also agrees with previous thermodynamic theories. | Cho, Kwang Soo; Lee, Junghaeng | Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu, South Korea | 56316379300; 57198781113 | polphy@knu.ac.kr; | JOURNAL OF THE KOREAN PHYSICAL SOCIETY | J KOREAN PHYS SOC | 0374-4884 | 1976-8524 | 79 | 3 | SCIE | PHYSICS, MULTIDISCIPLINARY | 2021 | 0.657 | 90.1 | 0.13 | 2025-07-30 | 4 | 4 | Onsager variation principle; Irreversible thermodynamics; Internal variable; Dissipation function | RECIPROCAL RELATIONS; INTERNAL VARIABLES; COMPLEX FLUIDS; DYNAMICS; FLUCTUATIONS; PRINCIPLE; RHEOLOGY | Dissipation function; Internal variable; Irreversible thermodynamics; Onsager variation principle | English | 2021 | 2021-08 | 10.1007/s40042-021-00217-9 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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