H S Kim

Gachon University, Sŏngnam, Gyeonggi-do, South Korea

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Publications (734)1607.53 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The dynamic strain aging (DSA) of metallic materials due to solute atom diffusion to mobile dislocations induce deformation instability with load fluctuations and deformation localizations, hence reducing their sheet formability. In this paper, DSA behaviors of twinning induced plasticity (TWIP) steel with and without Al during tensile testing and deep drawing are investigated in terms of strain localization and the Portevin-Le Chatelier (PLC) band. A theoretical DSA model with internal variables of dislocation density and twin volume fraction is presented for an estimation of strain localization and strain hardening behavior of TWIP steels. The simulation results of the load history and PLC bands during tensile testing and deep drawing are in good agreement with the experimental values. A serration behavior is observed in high-Mn TWIP steels and its tensile residual stress is higher than that in the Al-added TWIP steels, which results in a deformation crack or delayed fracture of deep drawn specimens.
    Materials Science and Engineering A 03/2015; 633. DOI:10.1016/j.msea.2015.03.008 · 2.41 Impact Factor
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    ABSTRACT: It is unclear whether treating brain metastasis before starting systemic chemotherapy can improve survival compared to upfront chemotherapy in non-small cell lung cancer (NSCLC) with asymptomatic cerebral oligo-metastases. We undertook a randomized controlled trial of 105 patients with one to four brain metastases, admitted to Samsung Medical Center between 2008 and 2013. Patients were randomly assigned to receive stereotactic radiosurgery (SRS) (49 patients) followed by chemotherapy or upfront chemotherapy (49 patients). The primary end point was overall survival and secondary end points included central nervous system (CNS) progression-free survival, progression to symptomatic brain metastasis, and brain functional outcome. The median age was 58 years (range, 29-85) with ECOG 0-1 performance status, and 40% of patients were never smokers. Most patients had adenocarcinoma, and about half of patients had only one brain metastasis while, the rest had multiple cerebral metastases. The median overall survival time was 14.6 months (95% CI, 9.2-20.0) in SRS group and 15.3 months (95% CI, 7.2-23.4) for upfront chemotherapy group (P=.418). There was no significant difference in time to CNS disease progression (median, 9.4 months (SRS) vs. 6.6 months (upfront chemotherapy), P=.248). Symptomatic progression of brain metastases was observed more frequently in upfront chemotherapy group (26.5%) than SRS group (18.4%) but without statistical significance. Although this study included smaller sample size than initially anticipated due to early termination, SRS followed by chemotherapy did not improve overall survival in oligo-brain metastases NSCLC patients compared with upfront chemotherapy. Further study with large number of patients should be needed to confirm the use of upfront chemotherapy alone in this subgroup of patients. © The Author 2014. Published by Oxford University Press on behalf of the European Society for Medical Oncology. All rights reserved. For permissions, please email: journals.permissions@oup.com.
    Annals of Oncology 12/2014; DOI:10.1093/annonc/mdu584 · 6.58 Impact Factor
  • Fertility and Sterility 09/2014; 102(3):e317-e318. DOI:10.1016/j.fertnstert.2014.07.1076 · 4.30 Impact Factor
  • Fertility and Sterility 09/2014; 102(3):e66. DOI:10.1016/j.fertnstert.2014.07.225 · 4.30 Impact Factor
  • Fertility and Sterility 09/2014; 102(3):e324. DOI:10.1016/j.fertnstert.2014.07.1097 · 4.30 Impact Factor
  • Fertility and Sterility 09/2014; 102(3):e228. DOI:10.1016/j.fertnstert.2014.07.775 · 4.30 Impact Factor
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    ABSTRACT: In this study, a combination of silicon and carbon as the anode material for an all-solid-state battery has been investigated to overcome their individual deficiencies. The capacity of silicon thin films with an input power of 60 W shows dramatic failure after 38 cycles due to serious volume expansion. In contrast, C thin films at 60 W show high stability of cyclic performance and capacity retention. The amorphous silicon and carbon composite reduced the volume expansion of silicon during long term cycles and enhanced the low specific capacity of the carbon. This resistance of the volume expansion might be expected from the cushion effect caused by the carbon, which was confirmed by scanning electron microscope images after a 100 cycle test. These results indicate that amorphous silicon and carbon composite thin films have a high possibility as the stable anode material for an all-solid-state battery.
    Thin Solid Films 08/2014; 564. DOI:10.1016/j.tsf.2014.04.094 · 1.87 Impact Factor
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    ABSTRACT: Abstract This study examined the effects of a 6-week intermittent exercise training, at different intensities, on body composition, functional walking and aerobic endurance in overweight children. Forty-eight overweight children (age: 10.4 ± 0.9 years) were randomly assigned to either intervention or control group. Lower and higher intensity intermittent exercise groups (LIIE and HIIE) performed intermittent running three times a week. LIIE performed more intervals at a lower intensity [16 intervals at 100% of individual maximal aerobic speed (MAS), 8 minutes in total], and HIIE performed fewer intervals at a higher intensity (12 intervals at 120% of MAS, 6 minutes in total). Each interval consisted of a 15-second run at the required speed, followed by a 15-second passive recovery. After 6 weeks, HIIE had a significantly (p < 0.05) higher percentage reduction in sum of skinfolds (i.e. calf and triceps), and significantly (p < 0.05) fewer steps during the functional obstacle performance, as compared with LIIE and control group. Significant improvement (p < 0.05) was found in intermittent aerobic endurance for HIIE as compared to the control group. Higher intensity intermittent training is an effective and time-efficient intervention for improving body composition, functional walking and aerobic endurance in overweight children.
    European Journal of Sport Science 07/2014; 15(2):1-9. DOI:10.1080/17461391.2014.933880 · 1.31 Impact Factor
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    ABSTRACT: Superconducting tokamaks like KSTAR, EAST and ITER need elaborate magnetic controls mainly due to either the demanding experiment schedule or tighter hardware limitations caused by the superconducting coils. In order to reduce the operation runtime requirements, two types of plasma simulators for the KSTAR plasma control system (PCS) have been developed for improving axisymmetric magnetic controls. The first one is an open-loop type, which can reproduce the control done in an old shot by loading the corresponding diagnostics data and PCS setup. The other one, a closed-loop simulator based on a linear nonrigid plasma model, is designed to simulate dynamic responses of the plasma equilibrium and plasma current (Ip) due to changes of the axisymmetric poloidal field (PF) coil currents, poloidal beta, and internal inductance. The closed-loop simulator is the one that actually can test and enable alteration of the feedback control setup for the next shot. The simulators have been used routinely in 2012 plasma campaign, and the experimental performances of the axisymmetric shape control algorithm are enhanced. Quality of the real-time EFIT has been enhanced by utilizations of the open-loop type. Using the closed-loop type, the decoupling scheme of the plasma current control and axisymmetric shape controls are verified through both the simulations and experiments. By combining with the relay feedback tuning algorithm, the improved controls helped to maintain the shape suitable for longer H-mode (10–16 s) with the number of required commissioning shots largely reduced.
    Fusion Engineering and Design 05/2014; 89(5). DOI:10.1016/j.fusengdes.2013.12.040 · 1.15 Impact Factor
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    ABSTRACT: In this study, phantom was used to evaluate attenuation correction computed tomography (CT) dose and image in case of pediatric positron emission tomography (PET)/CT scan. Three PET/CT scanners were used along with acryl phantom in the size for infant and ion-chamber dosimeter. The CT image acquisition conditions were changed from 10 to 20, 40, 80, 100 and 160 mA and from 80 to 100, 120 and 140 kVp, which aimed at evaluating penetrate dose and computed tomography dose indexvolume (CTDIvol) value. And NEMA PET Phantom™ was used to obtain PET image under the same CT conditions in order to evaluate each attenuation-corrected PET image based on standard uptake value (SUV) value and signal-to-noise ratio (SNR). In general, the penetrate dose was reduced by around 92% under the minimum CT conditions (80 kVp and 10 mA) with the decrease in CTDIvol value by around 88%, compared with the pediatric abdomen CT conditions (100 kVp and 100 mA). The PET image with its attenuation corrected according to each CT condition showed no change in SUV value and no influence on the SNR. In conclusion, if the minimum dose CT that is properly applied to body of pediatric patient is corrected for attenuation to ensure that the effective dose is reduced by around 90% or more compared with that for adult patient, this will be useful to reduce radiation exposure level.
    Radiation Effects and Defects in Solids 04/2014; 169(4). DOI:10.1080/10420150.2013.848443 · 0.60 Impact Factor
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    ABSTRACT: InGaAs-capped InAs quantum dots (QDs) and InAs QDs were adopted for the study of the effects through growth temperature and the band structure of InAs QDs on the performance of GaAs-based QD solar cell. It has been shown that the defects due to low temperature growth resulted in the decrease of Voc, Jsc and external quantum efficiency for GaAs bulk solar cell and QD embedded solar cells. It has been also found that InAs QDs act as defects by trapping photo-generated carries which affect the carrier transport in QD solar cell. The QD solar cell with InGaAs-capped InAs QDs showed higher performance than the QD solar cell with only InAs QDs. Such result has been explained by photo-generated carrier trapping and tunneling through InGaAs QW state in InGaAs-capped InAs QDs.
    Journal of Nanoscience and Nanotechnology 04/2014; 14(4):2955-9. DOI:10.1166/jnn.2014.8639 · 1.34 Impact Factor
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    ABSTRACT: A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This scheme has many advantageous properties over previously studied focusing schemes, including being significantly shorter for a given energy and having a significantly better energy bandwidth. Experimental results from the ATF2 accelerator at KEK are presented that validate the operating principle of such a scheme by demonstrating the demagnification of a 1.3 GeV electron beam down to below 65 nm in height using an energy-scaled version of the compact focusing optics designed for the ILC collider.
    Physical Review Letters 01/2014; 112:034802. · 7.73 Impact Factor
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    ABSTRACT: A facile and rapid glycine-assisted combustion method was developed to synthesize polycrystalline La0.8Ca0.2MnO3 (LCMO) powder by dissolving lanthanum nitrate, calcium nitrate, manganese nitrate (oxidant) and glycine (fuel) as the starting materials and water as solvent and then heating the resulting solution on a heating plate. The X-ray diffraction and FTIR analyses confirmed the orthorhombic crystal structure, and a morphological study showed the polycrystalline form of the LCMO powder. The calculated lattice constants a = 5.46, b = 7.73, and c = 5.49 Å agreed well with the standard values. The magnetic measurements showed a paramagnetic behavior of LCMO at room temperature. The maximum change in entropy observed for the LCMO sample was −1.95 J/kgK at an applied magnetic field of 2 T at the Curie temperature of 165 K.
    Journal- Korean Physical Society 12/2013; 61(12). DOI:10.3938/jkps.61.2000 · 0.43 Impact Factor
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    ABSTRACT: Spherical Ti-6Al-4V powders in the size range of 250 and 300 were uniformly doped with nano-sized hydroxyapatite (HAp) powders by Spex milling process. A single pulse of 0.75-2.0 kJ/0.7 g of the Ti-6Al-4V powders doped with HAp from 300 mF capacitor was applied to produce fully porous and porous-surfaced Ti-6Al-4V implant compact by electro-discharge-sintering (EDS). The solid core was automatically formed in the center of the compact after discharge and porous layer consisted of particles connected in three dimensions by necks. The solid core increased with an increase in input energy. The compressive yield strength was in a range of 41 to 215 MPa and significantly depended on input energy. X-ray photoelectron spectroscopy and energy dispersive x-ray spectrometer were used to investigate the surface characteristics of the Ti-6Al-4V compact. Ti and O were the main constituents, with smaller amount of Ca and P. It was thus concluded that the porous-surfaced Ti-6Al-4V implant compacts doped with HAp can be efficiently produced by manipulating the milling and electro-discharge-sintering processes.
    10/2013; 20(5). DOI:10.4150/KPMI.2013.20.5.376
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    ABSTRACT: Plasma-facing components (PFCs) in fusion devices are exposed to an irradiation environment of high particle flux. Among various candidate materials for PFCs, graphite is used as a first-wall material of the Korea Superconducting Tokamak Advanced Research (KSTAR) and tungsten is being strongly considered as a divertor material of the international thermonuclear experimental reactor (ITER). In this experiment, graphite and tungsten targets were irradiated by using low-energy helium ions, and the irradiation’s influence on each target was studied with particular emphasis on the surface change. Changes in the surface morphology were observed by using scanning electron microscopy (SEM); induced disorders in the structure were investigated by using X-ray diffraction (XRD), Raman spectroscopy, and electron spin resonance (ESR) measurements.
    Journal- Korean Physical Society 10/2013; 63(7). DOI:10.3938/jkps.63.1422 · 0.43 Impact Factor
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    Nuclear Fusion 10/2013; 53(10):104005. DOI:10.1088/0029-5515/53/10/104005 · 3.24 Impact Factor
  • Interactive Cardiovascular and Thoracic Surgery 09/2013; 17(suppl 2):S142-S142. DOI:10.1093/icvts/ivt372.300 · 1.11 Impact Factor
  • Interactive Cardiovascular and Thoracic Surgery 09/2013; 17(suppl 2):S118-S119. DOI:10.1093/icvts/ivt372.204 · 1.11 Impact Factor
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    ABSTRACT: This study investigated the crystallization behavior of a kinetically metastable Al80Fe10Ti5Ni5 amorphous phase. The Al80Fe10Ti5Ni5 amorphous phase was synthesized via the mechanical alloying of elemental powders of Al, Fe, Ti, and Ni. The microstructures and crystallization kinetics of the as-milled and annealed powders were characterized using X-ray diffraction, transition electron microscopy, and non-isothermal differential thermal analysis techniques. The results demonstrated that an Al80Fe10Ti5Ni5 amorphous phase was obtained after 40 h of ball milling. The produced amorphous phase exhibited one-stage crystallization on heating, i.e., the amorphous phase transforms into nanocrystalline Al13(Fe,Ni)4 (40 nm) and Al3Ti (10 nm) intermetallic phases. The activation energy for the crystallization of the alloy evaluated from the Kissinger equation was approximately 538±5 kJ/mol using the peak temperature of the exothermic reaction. The Avrami exponent or reaction order n indicates that the nucleation rate decreases with time and the crystallization is governed by a three-dimensional diffusion-controlled growth. These results provide new opportunities for structure control through innovative alloy design and processing techniques.
    Metals and Materials International 09/2013; 19(5):901-906. DOI:10.1007/s12540-013-5001-7 · 1.22 Impact Factor
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    ABSTRACT: Frequency modulation reflectometer has been developed to measure the plasma density profile of the Korea Superconducting Tokamak Advanced Research tokamak. Three reflectometers are operating in extraordinary polarization mode in the frequency range of Q band (33.6-54 GHz), V band (48-72 GHz), and W band (72-108 GHz) to measure the density up to 7 × 10(19) m(-3) when the toroidal magnetic field is 2 T on axis. The antenna is installed inside of the vacuum vessel. A new vacuum window is developed by using 50 μm thick mica film and 0.1 mm thick gold gasket. The filter bank of low pass filter, notch filter, and Faraday isolator is used to reject the electron cyclotron heating high power at attenuation of 60 dB. The full frequency band is swept in 20 μs. The mixer output is directly digitized with sampling rate of 100 MSamples/s. The phase is obtained by using wavelet transform. The whole hardware and software system is described in detail and the measured density profile is presented as a result.
    The Review of scientific instruments 08/2013; 84(8):084702. DOI:10.1063/1.4817305 · 1.58 Impact Factor

Publication Stats

11k Citations
1,607.53 Total Impact Points

Institutions

  • 2014
    • Gachon University
      Sŏngnam, Gyeonggi-do, South Korea
  • 2010–2014
    • National Fusion Research Institute
      Daiden, Daejeon, South Korea
    • Soon Chun Hyang University Hospital
      Sŏul, Seoul, South Korea
  • 2000–2014
    • Korea University
      • • Department of Materials Science and Engineering
      • • Department of Physics
      • • College of Nursing
      • • College of Medicine
      Sŏul, Seoul, South Korea
    • Jeonju National University of Education
      Tsiuentcheou, North Jeolla, South Korea
    • Gyeongsang National University
      Shinshū, Gyeongsangnam-do, South Korea
    • Kyorin University
      • Department of Chemistry
      Mitaka, Tōkyō, Japan
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea
    • Fukuoka Institute of Technology
      Hukuoka, Fukuoka, Japan
    • Sunchon National University
      Junten, South Jeolla, South Korea
  • 1998–2014
    • Sungkyunkwan University
      • • School of Medicine
      • • School of Advanced Materials Science and Engineering (AMSE)
      • • Department of Orthopedic Surgery
      • • Department of Computer Engineering
      Sŏul, Seoul, South Korea
    • Kyungnam University
      Changnyeong, South Gyeongsang, South Korea
    • Youngdong University
      Sŏul, Seoul, South Korea
  • 1994–2014
    • University of Seoul
      Sŏul, Seoul, South Korea
  • 2013
    • Korean Institute of Geoscience and Mineral Resources
      Daiden, Daejeon, South Korea
  • 2010–2013
    • Dankook University
      Eidō, North Chungcheong, South Korea
  • 2008–2013
    • Asan Medical Center
      • Department of Nuclear Medicine
      Sŏul, Seoul, South Korea
    • Pusan National University
      • Department of Civil and Environmental Engineering
      Tsau-liang-hai, Busan, South Korea
    • Bundang Jesaeng Hospital
      Sŏngnam, Gyeonggi Province, South Korea
    • RURAL DEVELOPMENT ADMINISTRATION
      Seikan-ri, South Chungcheong, South Korea
  • 2007–2013
    • Pohang University of Science and Technology
      • • Department of Materials Science and Engineering
      • • Pohang Accelerator Laboratory
      Geijitsu, Gyeongsangbuk-do, South Korea
    • Korea Institute of Nuclear Safety
      Sŏul, Seoul, South Korea
  • 2002–2013
    • Korea Electrotechnology Research Institute-KERI
      • Battery Research Center
      Tsau-liang-hai, Busan, South Korea
    • Korea Basic Science Institute KBSI
      Sŏul, Seoul, South Korea
  • 1992–2013
    • Chungbuk National University
      • College of Pharmacy
      Chinsen, Chungcheongbuk-do, South Korea
  • 2000–2012
    • Chosun University
      • Department of Nuclear Energy Engineering
      Gwangju, Gwangju, South Korea
  • 1997–2012
    • Yonsei University
      • • Department of Astronomy
      • • Department of Pediatrics
      • • Department of Biomedical Laboratory Science
      • • Department of Mechanical Engineering
      • • Department of Orthopaedic Surgery
      • • The Institute of Kidney Disease
      • • Department of Internal Medicine
      Sŏul, Seoul, South Korea
    • Korea Institute of Science and Technology
      Sŏul, Seoul, South Korea
  • 1995–2012
    • Kyungpook National University
      • • Department of Astronomy and Atmospheric Sciences
      • • School of Computer Science and Engineering
      • • Department of Applied Chemistry
      • • Department of Anatomy
      Daikyū, Daegu, South Korea
  • 1993–2012
    • Seoul National University
      • • Department of Obstetrics and Gynecology
      • • Department of Anesthesiology
      • • College of Agriculture and Life Sciences
      • • Department of Physics and Astronomy
      • • Department of Nuclear Engineering
      • • Department of Agricultural Biotechnology
      • • Department of Pharmacology
      • • College of Natural Sciences
      Sŏul, Seoul, South Korea
  • 2011
    • Konkuk University
      Sŏul, Seoul, South Korea
  • 2010–2011
    • Seoul National University Bundang Hospital
      • Department of Dermatology
      Sŏul, Seoul, South Korea
  • 2000–2011
    • Hallym University
      • College of Medicine
      Sŏul, Seoul, South Korea
  • 1995–2011
    • Catholic University of Korea
      • • Department of Radiology
      • • Department of Physics
      • • Department of Dermatology
      • • Department of Pathology
      • • College of Medicine
      • • Department of Ophthalmology
      Sŏul, Seoul, South Korea
  • 1993–2011
    • Yonsei University Hospital
      • • Department of Internal Medicine
      • • Surgery
      Sŏul, Seoul, South Korea
  • 1992–2011
    • Kyung Hee University
      • • Department of Medicine
      • • Department of Chemistry
      • • College of Pharmacy
      Seoul, Seoul, South Korea
  • 2004–2010
    • Gwangju Institute of Science and Technology
      • School of Environmental Science and Engineering
      Gwangju, Gwangju, South Korea
    • National Cancer Center Korea
      • Gastric Cancer Branch
      Kōyō, Gyeonggi-do, South Korea
    • Samsung Techwin Co.
      Onyang, Chungcheongnam-do, South Korea
    • University of Wollongong
      • Institute for Superconducting and Electronic Materials
      City of Greater Wollongong, New South Wales, Australia
    • Plant Genomics and Breeding Institute
      Sŏul, Seoul, South Korea
    • Stanford University
      Palo Alto, California, United States
  • 2009
    • Seoul Medical Center
      Sŏul, Seoul, South Korea
    • Inha University
      Chemulpo, Incheon, South Korea
  • 2008–2009
    • Chung-Ang University
      • School of Electrical and Electronics Engineering
      Sŏul, Seoul, South Korea
  • 2007–2009
    • National Institute of Animal Science
      Sŏul, Seoul, South Korea
  • 1999–2009
    • Soonchunhyang University
      Onyang, Chungcheongnam-do, South Korea
    • MEDIPOST Biomedical Research Institute
      Sŏul, Seoul, South Korea
  • 1998–2009
    • Korea Advanced Institute of Science and Technology
      • • Department of Electrical Engineering
      • • Department of Biological Sciences
      • • Department of Physics
      • • Department of Materials Science and Engineering
      Sŏul, Seoul, South Korea
  • 1996–2009
    • Ajou University
      • • Department of Obstetrics and Gynecology
      • • Department of Nephrology
      Sŏul, Seoul, South Korea
    • Wonju Severance Christian Hospital
      Genshū, Gangwon-do, South Korea
  • 2005–2008
    • Korea Institute of Energy Research
      Sŏul, Seoul, South Korea
    • Korea Maritime and Ocean University
      • Division of Electronics and Electrical Engineering
      Tsau-liang-hai, Busan, South Korea
    • University of Suwon
      Suigen, Gyeonggi Province, South Korea
    • Ufa State Aviation Technical University
      Oufa, Bashkortostan, Russia
    • Sun Moon University
      Onyang, Chungcheongnam-do, South Korea
  • 2003–2008
    • Ewha Womans University
      • Department of Pediatrics
      Sŏul, Seoul, South Korea
  • 2001–2008
    • Korea Atomic Energy Research Institute (KAERI)
      Daiden, Daejeon, South Korea
    • Seonam University
      Onyang, South Chungcheong, South Korea
    • Hyundai Heavy Industries
      Urusan, Ulsan, South Korea
    • Heriot-Watt University
      • Department of Chemistry
      Edinburgh, Scotland, United Kingdom
    • Kyushu University
      • Undergraduate School of Agriculture
      Hukuoka, Fukuoka, Japan
  • 1999–2008
    • Chungnam National University
      • • College of Medicine
      • • Department of Materials Science and Engineering
      Daiden, Daejeon, South Korea
    • Inje University
      • Department of Mechanical and Automotive Engineering
      Kŭmhae, South Gyeongsang, South Korea
  • 1996–2008
    • Chonnam National University
      • • Department of Internal Medicine
      • • Department of Pathology
      • • Department of Otolaryngology and Head and Neck Surgery
      Gwangju, Gwangju, South Korea
  • 1997–2007
    • Seoul National University Hospital
      • • Department of Anesthesiology and Pain Medicine
      • • Department of Orthopedic Surgery
      • • Department of Radiology
      • • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 2006
    • Daewoo Engineering and Construction
      Sŏul, Seoul, South Korea
  • 2001–2006
    • Sogang University
      • Department of Electronic Engineering
      Sŏul, Seoul, South Korea
  • 1999–2006
    • Samsung Advanced Institute of Technology
      Usan-ri, Gyeonggi-do, South Korea
    • University of Ulsan
      • • College of Medicine
      • • Department of Internal Medicine
      • • Department of Medicine
      Ulsan, Ulsan, South Korea
  • 1998–2004
    • Chonbuk National University
      • Research Center for Advanced Materials Development (RCAMD)
      Tsiuentcheou, Jeollabuk-do, South Korea
  • 2001–2002
    • Electronics and Telecommunications Research Institute
      Sŏul, Seoul, South Korea
  • 2000–2002
    • University of Strathclyde
      • Institute of Photonics
      Glasgow, Scotland, United Kingdom
  • 1995–2001
    • Korea Research Institute of Bioscience and Biotechnology KRIBB
      • Anticancer Research Laboratory
      Ansan, Gyeonggi, South Korea
    • Okayama University
      • Faculty of Pharmaceutical Science
      Okayama, Okayama, Japan
  • 1999–2000
    • Northern Inyo Hospital
      BIH, California, United States
  • 1998–2000
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
  • 1995–1997
    • Wonkwang University
      • Department of Medicine
      Riri, North Jeolla, South Korea