H S Kim

National Fusion Research Institute, Daiden, Daejeon, South Korea

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Publications (797)1562.16 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: In the present work, commercial Al-6061 alloy tubes were processed via multi-pass parallel tubular channel angular pressing (PTCAP). The effects of the number of passes on grain refinement and mechanical properties were investigated. The microstructural evolution was characterized using electron back scattered diffraction (EBSD) and scanning electron microscopy (SEM). The mechanical properties were evaluated using tensile tests and hardness measurements. The EBSD analyses presented that the elongated subgrains or grains with ~800 nm in size and a high fraction of low-angle grain boundaries were formed after two PTCAP passes. After four passes, the elongated subgrains have transformed to almost equiaxed grains with ~400 nm in size and high-angle grain boundaries. Microhardness of the processed tube increased from 38.9 to 63.4 HV (~63%) after three PTCAP passes. An increase in the number of PTCAP passes after 3 passes has no more effect on the microhardness. Yield and ultimate tensile strength were increased by 2.1 and 1.6 times, respectively, after four PTCAP passes (ε ~6.4) compared to the annealed sample. Ductile fracture with an extensive necking zone and many big dimples occurs in the annealed sample, while fine dimples and limited ductile fracture features were observed in the ultra-fine grained PTCAP processed samples.
    Metallurgical and Materials Transactions A 12/2014; · 1.73 Impact Factor
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    ABSTRACT: Purpose: The aim of this study is to evaluate the safety of fertility-sparing surgery as the treatment for patients with primary mucinous epithelial ovarian cancer. Materials and Methods: A retrospective study of patients with mucinous ovarian cancer between 1991 and 2010 was performed. The demographics and survival outcomes were compared between patients who underwent fertility-sparing surgery and those who underwent radical surgery. Results: A total of 110 patients underwent primary surgery. At the time of surgery, tumors appeared to be grossly confined to the ovaries in 90 patients, and evidence of metastasis was definite in 20 patients. Of the 90 patients with tumors that appeared to be grossly confined to the ovaries at surgical exploration, 35 (38.9%) underwent fertility-sparing surgery. The Kaplan- Meier curve and the log rank test showed no difference in either recurrence-free survival (p=0.792) or disease-specific survival (p=0.706) between the two groups. Furthermore, there was no significant difference in recurrence-free survival (p=0.126) or disease-specific survival (p=0.377) between the two groups, even when the analysis was limited to women below the age of 40. In a multivariate Cox model, fertility-sparing surgery had no effect on either recurrence-free survival (recurrence hazard ratio [HR], 1.20; 95% confidence interval [CI], 0.25 to 5.71) or disease-specific survival (death HR, 0.88; 95% CI, 0.17 to 4.60). Conclusion: Fertility-sparing surgery in primary mucinous cancer grossly confined to the ovaries may be a safe option and one not associated with an increase in recurrence or mortality.
    Cancer Research and Treatment 08/2014; · 1.96 Impact Factor
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    ABSTRACT: A series of deuterium permeation experiments were carried out using a nickel membrane in an elevated temperature range of 450–850 °C for application to nuclear fusion and nuclear hydrogen technologies. A complete set of permeability, diffusivity, and solubility data for deuterium in nickel was successfully determined. The results of this study were compared with results previously reported by other authors. The results for deuterium were also compared with the results for hydrogen to estimate the isotope effect. The results for and a discussion of deuterium permeation and the isotope effects in nickel are presented.
    International Journal of Hydrogen Energy 08/2014; 39(24):12789–12794. · 3.55 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; · 1.87 Impact Factor
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    ABSTRACT: Optical and magnetic properties of Ni doped ZnO planetary ball milled nanopowder synthesized by co-precipitation, Ceramics International, http://dx.doi.org/ 10.1016/j.ceramint.2014.07.148 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
    07/2014;
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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; · 1.15 Impact Factor
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    ABSTRACT: Bulk metallic glass (BMG) alloys have been known to show superior formability under a Newtonian viscous mode in a supercooled liquid region (SLR). Crystalline phases generated by a high-temperature forming process have a negative effect on the formability of the BMG alloys by the rapid increase of viscosity for an amorphous matrix. A constitutive model considering dynamic crystallization and a viscous flow for high-temperature deformation behavior of the Ti-based BMG was used for n estimation of the formability, and was verified to apply to the forming process in an SLR. The experimental formability of the Ti-based BMG has been found to be in good agreement with the finite element analyses results based on the constitutive model, and thus enable one to apply to the other forming processes conducted in an SLR.
    Materials and Manufacturing Processes 07/2014; 29(7). · 1.49 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; · 0.84 Impact Factor
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    ABSTRACT: Background:The risk and prognosis of ovarian cancer have not been well established in women with endometriosis. Thus, we investigated the impact of endometriosis on the risk and prognosis for ovarian cancer, and evaluated clinicopathologic characteristics of endometriosis-associated ovarian cancer (EAOC) in comparison with non-EAOC.Methods:After we searched an electronic search to identify relevant studies published online between January 1990 and December 2012, we found 20 case-control and 15 cohort studies including 444 255 patients from 1 625 potentially relevant studies. In the meta-analysis, ovarian cancer risk by endometriosis and clinicopathologic characteristics were evaluated using risk ratio (RR) or standard incidence ratio (SIR), and prognosis was investigated using hazard ratio (HR) with 95% confidence interval (CI). Heterogeneity was evaluated using Higgins I(2) to select fixed-effect (I(2) 50%) or random effects models (I(2)>50%), and found no publication bias using funnel plots with Egger's test (P>0.05). Furthermore, we performed subgroup analyses based on study design, assessment of endometriosis, histology, disease status, quality of study and adjustment for potential confounding factors to minimise bias.Results:Endometriosis increased ovarian cancer risk in case-control or two-arm cohort studies (RR, 1.265; 95% CI, 1.214-1.318) and single-arm cohort studies (SIR, 1.797; 95% CI, 1.276-2.531), which were similar in subgroup analyses. Although progression-free survival was not different between EAOC and non-EAOC (HR, 1.023; 95% CI, 0.712-1.470), EAOC was associated with better overall survival than non-EAOC in crude analyses (HR, 0.778; 95% CI, 0.655-0.925). However, progression-free survival and overall survival were not different between the two groups in subgroup analyses. Stage I-II disease, grade 1 disease and nulliparity were more common in EAOC (RRs, 1.959, 1.319 and 1.327; 95% CIs, 1.367-2.807, 1.149-1.514 and 1.245-1.415), whereas probability of optimal debulking surgery was not different between the two groups (RR, 1.403; 95% CI, 0.915-2.152). Furthermore, endometrioid and clear cell carcinomas were more common in EAOC (RRs, 1.759 and 2.606; 95% CIs, 1.551-1.995 and 2.225-3.053), whereas serous carcinoma was less frequent in EAOC than in non-EAOC (RR, 0.733; 95% CI, 0.617-0.871), and there was no difference in the risk of mucinous carcinoma between the two groups (RR, 0.805; 95% CI, 0.584-1.109). These clinicopathologic characteristics were also similar in subgroup analyses.Conclusions:Endometriosis is strongly associated with the increased risk of ovarian cancer, and EAOC shows favourable characteristics including early-stage disease, low-grade disease and a specific histology such as endometrioid or clear cell carcinoma. However, endometriosis may not affect disease progression after the onset of ovarian cancer.British Journal of Cancer advance online publication, 11 February 2014; doi:10.1038/bjc.2014.29 www.bjcancer.com.
    British Journal of Cancer 02/2014; · 5.08 Impact Factor
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    ABSTRACT: In this study the influence of precipitates on the mechanical properties and plastic anisotropy of an age hardenable aluminum alloy during uniaxial loading was investigated using crystal plasticity modeling. The kinetics model of Myhr et al. was used to obtain the solute and precipitate features after different cycles of aging treatment. The amounts of solute, precipitate size and volume fraction, and dislocation density varying during deformation, were used to calculate the slip system strength. An explicit term was obtained based on the elastic inclusion model for the directional dependency of internal stress developed by non-shearable rod shape precipitates. Also, a dislocation evolution model was modified to assess the anisotropic influence of non-shearable precipitate on work hardening, and the effects of solute content on the rate of dynamic recovery. It was found that the model results were in good agreement with experimental uniaxial flow stress obtained under different aging conditions. The application of the model to single crystal revealed that the precipitates can reduce crystallography anisotropy, which in part was attributed to the precipitate induced anisotropy.
    Computational Materials Science 02/2014; 83:78–85. · 1.88 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: Although curcumin suppresses the growth of a variety of cancer cells, its poor absorption and low systemic bioavailability have limited its translation into clinics as an anticancer agent. In this study, we show that dimethoxycurcumin (DMC), a methylated, more stable analog of curcumin, is significantly more potent than curcumin in inducing cell death and reducing the clonogenicity of malignant breast cancer cells. Furthermore, DMC reduces the tumor growth of xenografted MDA-MB 435S cells more strongly than curcumin. We found that DMC induces paraptosis accompanied by excessive dilation of mitochondria and the endoplasmic reticulum (ER); this is similar to curcumin, but a much lower concentration of DMC is required to induce this process. DMC inhibits the proteasomal activity more strongly than curcumin, possibly causing severe ER stress and contributing to the observed dilation. DMC treatment upregulates the protein levels of CCAAT-enhancer-binding protein homologous protein (CHOP) and Noxa, and the small interfering RNA-mediated suppression of CHOP, but not Noxa, markedly attenuates DMC-induced ER dilation and cell death. Interestingly, DMC does not affect the viability, proteasomal activity or CHOP protein levels of human mammary epithelial cells, suggesting that DMC effectively induces paraptosis selectively in breast cancer cells, while sparing normal cells. Taken together, these results suggest that DMC triggers a stronger proteasome inhibition and higher induction of CHOP compared with curcumin, giving it more potent anticancer effects on malignant breast cancer cells.
    Cell Death & Disease 01/2014; 5:e1112. · 6.04 Impact Factor
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    ABSTRACT: Objectives The infant mortality rate is a sensitive and commonly used indicator of the socio-economic status of a population. Generally, studies investigating the relationship between infant mortality and socio-economic status have focused on full-term infants in Western populations. This study examined the effects of education level and employment status on full-term and preterm infant mortality in Korea. Data were collected from the National Birth Registration Database and merged with data from the National Death Certification Database. Study design Prospective cohort study. Methods In total, 1,316,184 singleton births registered in Korea's National Birth Registration Database between January 2004 and December 2006 were included in the study. Multivariate logistic regression analysis was performed. Results Paternal and maternal education levels were inversely related to infant mortality in preterm and full-term infants following multivariate adjusted logistic models. Parental employment status was not associated with infant mortality in full-term infants, but was associated with infant mortality in preterm infants, after adjusting for place of birth, gender, marital status, paternal age, maternal age and parity. Conclusions Low paternal and maternal education levels were found to be associated with infant mortality in both full-term and preterm infants. Low parental employment status was found to be associated with infant mortality in preterm infants but not in full-term infants. In order to reduce inequalities in infant mortality, public health interventions should focus on providing equal access to education.
    Public health 01/2014; · 1.26 Impact Factor
  • Metals and Materials International. 01/2014; 20(5):825-834.
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    Nuclear Fusion 10/2013; 53(10):104005. · 2.73 Impact Factor
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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):1385-1389. · 0.51 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). · 3.66 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. · 1.52 Impact Factor
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    ABSTRACT: A new analogue circuit design methodology using independently optimised self-cascode (SC) structures is proposed. Based on the concept of the dual-workfunction-gate structures, which are equivalent to SC structures, transconductance and output resistance optimised SC MOSFETs were used in the differential input and output stages, respectively. An operational amplifier (opamp) with the proposed design methodology using standard 0.18 μm CMOS technology was designed to provide better performance. The measured DC gain of the fabricated opamp with independently-optimised SC MOSFETs was approximately 12 dB higher than that of the conventional opamp.
    Electronics Letters 04/2013; 49(9):591-592. · 1.04 Impact Factor
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    ABSTRACT: In this study, rule-based control strategies were proposed according to the result of the process state diagnosis. Multivariate statistical techniques were used to derive the diagnosis results that included comprehensive information for the current process state. Based on the diagnosis result, the quantitative control setpoint could be calculated by using the optimized mathematical model. The developed process diagnosis procedure and the control strategies were applied in a pilot-scale A2/O (anaerobic/anoxic/oxic) process. The target variables in the proposed rule-based control strategies according to the process state diagnosis were the effluent NH4–N and NOX–N components. From the application of these rule-based control strategies according to the process state diagnosis, the percentages of groups 3 and 4, which were considered the abnormal process state, were decreased by about 53.8% compared to the no-control case. In addition, the maintenance interval of the control action ranged from 4 h to 25 h. Effluent NH4–N and NOX–N concentrations lower than the target values were maintained by applying the proposed rule-based control strategies according to the process state diagnosis. Moreover, frequent changes of the process operating state were minimized and the electrical equipment load was reduced.
    Chemical Engineering Journal 04/2013; 222:391–400. · 3.47 Impact Factor

Publication Stats

8k Citations
1,562.16 Total Impact Points

Institutions

  • 2011–2014
    • National Fusion Research Institute
      Daiden, Daejeon, South Korea
    • Kyung Hee University
      • Department of Medicine
      Seoul, Seoul, South Korea
  • 2010–2014
    • Dankook University
      Eidō, North Chungcheong, South Korea
  • 2007–2014
    • Pohang University of Science and Technology
      • • Department of Materials Science and Engineering
      • • Pohang Accelerator Laboratory
      Antō, North Gyeongsang, South Korea
    • Yeungnam University
      • Department of Microbiology
      Daikyū, Daegu, South Korea
    • Korea Institute of Nuclear Safety
      Sŏul, Seoul, South Korea
  • 1997–2014
    • Seoul National University Hospital
      • • Department of Family Medicine
      • • Department of Obstetrics and Gynecology
      • • Department of Anesthesiology and Pain Medicine
      • • Department of Orthopedic Surgery
      • • Department of Internal Medicine
      Sŏul, Seoul, South Korea
    • Wonkwang University
      Riri, North Jeolla, South Korea
    • Jilin Agricultural University
      Hsin-ching, Jilin Sheng, China
    • Kyoto University
      • Department of Molecular and Cellular Biology
      Kyoto, Kyoto-fu, Japan
  • 2001–2013
    • Hanyang University
      • • Department of Nuclear Engineering
      • • College of Medicine
      • • Major in Internal Medicine
      Sŏul, Seoul, South Korea
    • Asan Medical Center
      • Department of Vascular Surgery
      Seoul, Seoul, South Korea
    • Inje University Paik Hospital
      • Department of Internal Medicine
      Goyang, Gyeonggi, South Korea
    • Wonju Severance Christian Hospital
      Genshū, Gangwon, South Korea
    • Korea University
      • College of Nursing
      Seoul, Seoul, South Korea
    • MEDIPOST Biomedical Research Institute
      Sŏul, Seoul, South Korea
  • 2000–2013
    • Pusan National University
      • • Department of Civil and Environmental Engineering
      • • Department of Dermatology
      • • Division of Electrical and Electronics Engineering
      • • Department of Biological Sciences
      Tsau-liang-hai, Busan, South Korea
    • Jeonju National University of Education
      Tsiuentcheou, North Jeolla, South Korea
    • Chosun University
      Gwangju, Gwangju, South Korea
  • 1991–2013
    • Seoul National University
      • • Department of Physics and Astronomy
      • • Department of Obstetrics and Gynecology
      • • Department of Anesthesiology
      • • School of Chemical and Biological Engineering
      • • Department of Nuclear Engineering
      • • Department of Applied Biology and Chemistry
      • • Department of Pharmacology
      • • College of Dentistry
      • • College of Agriculture and Life Sciences
      • • College of Medicine
      • • College of Natural Sciences
      Sŏul, Seoul, South Korea
  • 2012
    • Konkuk University
      Sŏul, Seoul, South Korea
  • 2002–2011
    • Korea Electrotechnology Research Institute-KERI
      Tsau-liang-hai, Busan, South Korea
    • Korea Basic Science Institute KBSI
      Sŏul, Seoul, South Korea
  • 1998–2011
    • Chonbuk National University
      Tsiuentcheou, North Jeolla, South Korea
    • Osaka University of Pharmaceutical Sciences
      • Faculty of Pharmaceutical Sciences
      Ōsaka, Ōsaka, Japan
    • Youngdong University
      Sŏul, Seoul, South Korea
    • Kyungnam University
      Changnyeong, South Gyeongsang, South Korea
    • International St. Mary's Hospitals
      Chemulpo, Incheon, South Korea
  • 1993–2011
    • Yonsei University Hospital
      • • Department of Internal Medicine
      • • Surgery
      Sŏul, Seoul, South Korea
    • Keimyung University
      Sŏul, Seoul, South Korea
  • 2009
    • Chung-Ang University
      • School of Electrical and Electronics Engineering
      Seoul, 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
      Seoul, Seoul, South Korea
  • 1997–2009
    • Yonsei University
      • • Division of Biomedical Engineering
      • • Department of Biomedical Laboratory Science
      • • Department of Mechanical Engineering
      • • College of Nursing
      • • Department of Orthopaedic Surgery
      • • Department of Internal Medicine
      Seoul, Seoul, South Korea
  • 1996–2009
    • Ajou University
      • • Department of Diagnostic Radiology
      • • Department of Obstetrics and Gynecology
      • • College of Natural Sciences
      • • Department of Nephrology
      Seoul, Seoul, South Korea
    • Cheil General Hospital
      Sŏul, Seoul, South Korea
    • Cornell University
      • Department of Neurology and Neuroscience
      Ithaca, NY, United States
  • 2008
    • Kosin University
      Tsau-liang-hai, Busan, South Korea
  • 2007–2008
    • National Institute of Animal Science
      Sŏul, Seoul, South Korea
    • RURAL DEVELOPMENT ADMINISTRATION
      Seikan-ri, South Chungcheong, South Korea
  • 2001–2008
    • Hyundai Heavy Industries
      Urusan, Ulsan, South Korea
  • 1999–2008
    • Inje University
      Kŭmhae, South Gyeongsang, South Korea
    • Chungnam National University
      • • College of Medicine
      • • Department of Materials Science and Engineering
      Daiden, Daejeon, South Korea
    • Soonchunhyang University
      Onyang, South Chungcheong, South Korea
  • 1998–2008
    • Sungkyunkwan University
      • • School of Medicine
      • • Department of Architectural Engineering
      • • School of Advanced Materials Science and Engineering (AMSE)
      • • School of Pharmacy
      Seoul, Seoul, South Korea
  • 2005–2007
    • Korea Atomic Energy Research Institute (KAERI)
      Daiden, Daejeon, South Korea
    • University of Suwon
      Suigen, Gyeonggi Province, South Korea
    • Korea Institute of Energy Research
      Sŏul, Seoul, South Korea
    • Korea Maritime and Ocean University
      Tsau-liang-hai, Busan, South Korea
  • 1998–2007
    • Catholic University of Korea
      • • Department of Dermatology
      • • Department of Pathology
      • • College of Medicine
      • • Department of Ophthalmology
      Sŏul, Seoul, South Korea
  • 2006
    • University of Ulsan
      • Department of Radiology
      Ulsan, Ulsan, South Korea
    • 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 Province, South Korea
  • 1996–2006
    • Chonnam National University
      • • Department of Pathology
      • • Department of Gastroenterology
      • • Department of Internal Medicine
      • • Department of Otolaryngology and Head and Neck Surgery
      Gwangju, Gwangju, South Korea
  • 2004
    • Stanford University
      • Department of Materials Science and Engineering
      Palo Alto, CA, United States
  • 2003
    • Ewha Womans University
      • Department of Pediatrics
      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
      Seoul, Seoul, South Korea
  • 1992–2002
    • Chungbuk National University
      • College of Pharmacy
      Tyundyu, North Chungcheong, South Korea
  • 2000–2001
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea
  • 1998–2001
    • Ulsan University Hospital
      Urusan, Ulsan, 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
    • The University of Tokyo
      Tōkyō, Japan
    • Kyungpook National University
      Daikyū, Daegu, South Korea
  • 1998–2000
    • University of Oxford
      • Department of Psychiatry
      Oxford, ENG, United Kingdom
  • 1997–2000
    • Korea Institute of Science and Technology
      Sŏul, Seoul, South Korea
  • 1996–2000
    • Kyorin University
      Mitaka, Tōkyō, Japan
  • 1994–1997
    • University of Mississippi Medical Center
      • Department of Pharmacology and Toxicology
      Jackson, MS, United States