H S Kim

National Fisheries Research and Development Institution, Sŏul, Seoul, South Korea

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Publications (764)1625.41 Total impact

  • 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
  • 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
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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: 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: Objective: We conducted this study to compare tumor measurement by computed tomography (CT) and tumor response assessment between Response Evaluation Criteria In Solid Tumors (RECIST) 1.0 and RECIST 1.1 in patients with metastatic colorectal cancer (CRC). Methods: We reviewed the medical records of patients with metastatic CRC who received first-line chemotherapy between January 2004 and December 2012 and compared CT tumor measurement using two RECIST versions. Results: A total of 58 patients who had target lesions according to RECIST 1.0 were included in the study. The number of target lesions recorded by RECIST 1.1 was significantly lower than that by RECIST 1.0, with a decrease experienced in 48 patients (82.7%). Six patients had no target lesions because of the new criteria of RECIST 1.1 for lymph node size. Out of 95 lymph nodes from 58 patients, only 40% were defined as target lesions according to RECIST 1.1. The overall response rate of first-line chemotherapy according to RECIST 1.0 and 1.1 was 41.5 and 40.4%, respectively. The best tumor responses showed almost perfect agreement between RECIST 1.1 and RECIST 1.0 (ĸ = 0.913). Three patients showed disagreement of the best responses between the two RECIST versions. Conclusion: RECIST 1.1 showed a highly concordant response assessment with RECIST 1.0 in metastatic CRC and its clinical impact on therapeutic decisions was minimal. © 2014 S. Karger AG, Basel.
    Oncology 01/2014; 86(2):117-121. DOI:10.1159/000357714 · 2.17 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: Korean rose bitterling (Rhodeus uyekii) is a freshwater fish endemic to Korea. Natural populations of this species have experienced severe declines as a result of habitat fragmentation and water pollution. To conserve and restore R. uyekii, the genetic diversity of this species needs to be assessed at the population level. Eighteen novel polymorphic microsatellite loci for R. uyekii were developed using an enriched partial genomic library. Polymorphisms at these loci were studied in 150 individuals collected from three populations. The number of alleles at each locus ranged from 3 to 47 (mean = 17.1). Within the populations, the observed heterozygosity ranged from 0.032 to 1.000, expected heterozygosity from 0.082 to 0.967, and polymorphism information content from 0.078 to 0.950. Six loci showed significant deviation from Hardy-Weinberg equilibrium after Bonferroni's correction, and no significant linkage disequilibrium was detected between most locus pairs, except in three cases. These highly informative microsatellite markers should be useful for genetic population structure analyses of R. uyekii.
    Genetics and molecular research: GMR 01/2014; 13(4):8147-8152. DOI:10.4238/2014.October.7.9 · 0.85 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: In proton therapy, accurate monitoring of the in-vivo proton dose distribution is essential in order to deliver the planned dose to the tumor volume within a minimal safety margin. Recently, a strong correlation between the distributions of the proton dose and the prompt gammas was found, and various prompt-gamma distribution-measurement systems, including collimation-based systems, Compton cameras, knife-edge imaging systems, and ion vertex imaging systems, have been proposed. In the present study, the feasibility of proton dose distribution monitoring was tested using a two-dimensional measurement system for prompt gammas. The measurement system, developed in the present study, incorporates a vertically-aligned one-dimensional array of gamma sensors, a parallel multi-hole collimator, a precision movement system, and a digitizer- and LabVIEW-based automatic data acquisition system. A 45-MeV proton beam of 0.5 nA was delivered to a polymethyl methacrylate (PMMA) phantom, and the two-dimensional prompt-gamma distribution was measured using the developed system. The proton beam range could be quantitatively determined to within a 1.6-mm error by sigmoidal curve-fitting with the Boltzmann equation. A comparison of the prompt-gamma distribution as measured by our detection system with the proton dose distribution as measured independently by using Gafchromic EBT films positioned inside the PMMA phantom showed good agreement. Both results imply that it is, indeed, possible to confirm the patient's proton dose distribution by using two-dimensional prompt-gamma measurements.
    Journal- Korean Physical Society 10/2013; 63(7-7):1385-1389. DOI:10.3938/Jkps.63.1385 · 0.43 Impact Factor
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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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    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: We investigated the electronic structure of Na2IrO3 using optical spectroscopy, first-principles calculation, and x-ray absorption spectroscopy. We found that the electronic structure of Na2IrO3 is mainly determined by anisotropic hopping interactions and spin-orbit coupling. Due to the hopping interaction, the orbital character of the bands near the Fermi level deviates from the spin-orbit coupling-induced Jeff = 1/2 states. Polarization-dependent O 1s x-ray absorption spectroscopy showed that the Jeff = 1/2 state of an Ir atom can be mixed with the Jeff = 3/2 state of the neighboring Ir atom. This result implies that mixing between the Jeff = 1/2 and 3/2 states in the valence state should be carefully considered in proposed exotic states of Na2IrO3, such as topological insulator and quantum spin liquid states.
    Physical Review B 08/2013; 88(8). DOI:10.1103/PhysRevB.88.085125 · 3.66 Impact Factor
  • Annals of Oncology 08/2013; DOI:10.1093/annonc/mdt351 · 6.58 Impact Factor
  • HS Kim, K-S Yoo, DS Han
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    ABSTRACT: Intraductal papillary mucinous neoplasm (IPMN) is a cystic tumor of the pancreas with potency of malignant formation and invasiveness. It has a characteristic feature of cystic dilatation of the pancreatic duct, which is filled with abundant mucin produced by the tumor. Occasionally, IPMN invades directly into other adjacent organs such as duodenum, common bile duct, or stomach. The authors experienced a case of IPMN with gastric invasion showing a unique endoscopic feature of waterfall-like massive mucin covering the huge mass at the fundus of the stomach. This article is part of an expert video encyclopedia.
    06/2013; 1(1):170-171. DOI:10.1016/S2212-0971(13)70070-0
  • International Journal of Antimicrobial Agents 06/2013; 42:S112. DOI:10.1016/S0924-8579(13)70463-1 · 4.26 Impact Factor

Publication Stats

11k Citations
1,625.41 Total Impact Points


  • 2014
    • National Fisheries Research and Development Institution
      Sŏul, Seoul, South Korea
  • 1994–2014
    • University of Seoul
      Sŏul, Seoul, South Korea
  • 2013
    • Hanyang University
      • Department of Nuclear Engineering
      Sŏul, Seoul, South Korea
  • 2012–2013
    • Asan Medical Center
      • Department of Nuclear Medicine
      Sŏul, Seoul, South Korea
  • 2010–2013
    • Dankook University
      Eidō, North Chungcheong, South Korea
    • National Fusion Research Institute
      Daiden, Daejeon, South Korea
    • Soon Chun Hyang University Hospital
      Sŏul, Seoul, 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
  • 2000–2013
    • Pusan National University
      • • Department of Civil and Environmental Engineering
      • • Department of Dermatology
      • • Department of Organic Material Science and Engineering
      • • Department of Biological Sciences
      Tsau-liang-hai, Busan, South Korea
    • Beijing Medical University
      Peping, Beijing, China
    • Kyorin University
      • Department of Chemistry
      Mitaka, Tōkyō, Japan
    • Jeonju National University of Education
      Tsiuentcheou, North Jeolla, South Korea
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea
    • Sunchon National University
      Junten, South Jeolla, South Korea
  • 1993–2013
    • Seoul National University
      • • Department of Physics and Astronomy
      • • College of Agriculture and Life Sciences
      • • Department of Anesthesiology
      • • Department of Nuclear Engineering
      • • Department of Pathology
      • • Department of Agricultural Biotechnology
      • • Department of Pharmacology
      • • College of Natural Sciences
      Sŏul, Seoul, 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
    • Kyoto University
      • Department of Molecular and Cellular Biology
      Kyoto, Kyoto-fu, Japan
    • 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
  • 2011
    • Konkuk University
      Sŏul, Seoul, South Korea
  • 2010–2011
    • Seoul National University Bundang Hospital
      • Department of Dermatology
      Sŏul, Seoul, South Korea
  • 2009–2011
    • Inha University
      • Department of Materials Engineering
      Sŏul, Seoul, South Korea
    • Seoul Medical Center
      Sŏul, Seoul, South Korea
  • 1995–2011
    • Yonsei University Hospital
      • • Department of Internal Medicine
      • • Surgery
      Sŏul, Seoul, South Korea
    • 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
  • 2004–2010
    • Gwangju Institute of Science and Technology
      • School of Environmental Science and Engineering
      Gwangju, Gwangju, South Korea
    • Stanford University
      • Department of Materials Science and Engineering
      Palo Alto, CA, United States
    • Samsung Techwin Co.
      Onyang, Chungcheongnam-do, South Korea
    • Plant Genomics and Breeding Institute
      Sŏul, Seoul, South Korea
  • 2008–2009
    • Chung-Ang University
      • School of Electrical and Electronics Engineering
      Sŏul, Seoul, South Korea
      Seikan-ri, South Chungcheong, South Korea
    • Bundang Jesaeng Hospital
      Sŏngnam, Gyeonggi Province, South Korea
  • 2007–2009
    • National Institute of Animal Science
      Sŏul, Seoul, South Korea
  • 2000–2009
    • Korea University
      • • Department of Materials Science and Engineering
      • • Department of Physics
      • • College of Nursing
      • • College of Medicine
      Seoul, Seoul, South Korea
  • 1999–2009
    • Soonchunhyang University
      Onyang, South Chungcheong, 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
    • Chonbuk National University
      Tsiuentcheou, North Jeolla, South Korea
    • Kyungnam University
      Changnyeong, South Gyeongsang, South Korea
    • Youngdong University
      Sŏul, Seoul, South Korea
  • 1996–2009
    • Ajou University
      • • Department of Diagnostic Radiology
      • • Department of Obstetrics and Gynecology
      • • Department of Nephrology
      Seoul, Seoul, South Korea
    • Cheil General Hospital
      Sŏul, Seoul, South Korea
    • Wonju Severance Christian Hospital
      Genshū, Gangwon-do, South Korea
  • 2005–2008
    • Korea Maritime and Ocean University
      Tsau-liang-hai, Busan, South Korea
    • Ufa State Aviation Technical University
      Oufa, Bashkortostan, Russia
    • Sun Moon University
      Onyang, Chungcheongnam-do, South Korea
    • University of Suwon
      Suigen, Gyeonggi Province, South Korea
  • 2003–2008
    • Ewha Womans University
      • Department of Pediatrics
      Sŏul, Seoul, South Korea
  • 2001–2008
    • Inje University
      • Department of Mechanical and Automotive Engineering
      Kŭmhae, South Gyeongsang, South Korea
    • Hyundai Heavy Industries
      Urusan, Ulsan, South Korea
    • Seonam University
      Onyang, South Chungcheong, South Korea
    • Inje University Paik Hospital
      • Department of Internal Medicine
      Goyang, Gyeonggi, South Korea
  • 2000–2008
    • Chungnam National University
      • • College of Medicine
      • • Department of Materials Science and Engineering
      Daiden, Daejeon, South Korea
  • 1999–2008
    • Sungkyunkwan University
      • • School of Medicine
      • • School of Advanced Materials Science and Engineering (AMSE)
      • • Department of Orthopedic Surgery
      Sŏul, Seoul, 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
  • 2005–2007
    • Korea Institute of Energy Research
      Sŏul, Seoul, South Korea
  • 2001–2007
    • Korea Atomic Energy Research Institute (KAERI)
      Daiden, Daejeon, 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
  • 1992–2005
    • Kyung Hee University
      • • Department of Chemistry
      • • College of Pharmacy
      Sŏul, Seoul, 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
    • Hallym University
      • College of Medicine
      Sŏul, Seoul, South Korea
  • 1992–2002
    • Chungbuk National University
      • College of Pharmacy
      Chinsen, Chungcheongbuk-do, South Korea
  • 2000–2001
    • Chosun University
      Gwangju, Gwangju, South Korea
  • 1995–2001
    • Okayama University
      • Faculty of Pharmaceutical Science
      Okayama, Okayama, Japan
    • Korea Research Institute of Bioscience and Biotechnology KRIBB
      • Anticancer Research Laboratory
      Ansan, Gyeonggi, South Korea
  • 1999–2000
    • Northern Inyo Hospital
      BIH, California, United States
  • 1998–2000
    • University of Oxford
      • Department of Psychiatry
      Oxford, England, United Kingdom
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
  • 1995–1997
    • Wonkwang University
      • Department of Medicine
      Riri, North Jeolla, South Korea