H S Kim

Pohang University of Science and Technology, Antō, North Gyeongsang, South Korea

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Publications (886)1665.92 Total impact

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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: 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). · 1.30 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: 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. · 2.17 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. 01/2014; 83:78–85.
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    ABSTRACT: Development of advanced scenarios, an important experimental goal of the Korea superconducting tokamak advanced research (KSTAR) project, has just begun. The safety factor (q) profile is a key to achieve these advanced scenarios. Particularly the hybrid scenario, one of the advanced scenarios, can be established generally with low magnetic shear (s) at the center with central q-value above unity so to avoid sawtooth instability. This q-profile was successfully produced using early divertor formation during a plasma current ramp-up phase in KSTAR. Auxiliary heating was also employed during the current ramp-up phase to delay the inductive current diffusion to the center of the plasma. In addition to the early divertor formation method, the target q-profile was attempted to be achieved by modifying the plasma current waveform using the so-called, ‘current-overshoot’ method and the timing of L-mode to H-mode transition. In this work, the confinement characteristics of these sawtooth-free regimes are investigated. The global energy confinement time is calculated and compared with that of conventional H-modes in KSTAR. The confinement enhancement factor reveals that the newly developed discharges are not improved over H-modes contrary to results of other tokamaks. To investigate the reason, transport modeling is performed self-consistently with an integrated simulation package incorporating plasma equilibrium, transport, and heating and current drive. The current ramp-up phase is simulated and impact of early divertor formation, current-overshoot, and early L–H transition on the target q-profile and s/q profile is addressed. The s/q profile is found to be not improved in these discharges compared with hybrid scenarios reported in other tokamaks. Based on these results, future experimental directions are addressed to access the hybrid regimes in KSTAR.
    Current Applied Physics 01/2014; 14(1):144–149. · 1.81 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). · 3.77 Impact Factor
  • Physics Letters B. 05/2013; 722(s 1–3):48–54.
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    ABSTRACT: Reactor experiment for neutrino oscillation (RENO) began data-taking from August 2011. It successfully observed reactor antineutrino disappearance in April 2012 to measure the smallest mixing angle of θ13θ13. Two identical detectors, one at near location and the other at far location, are constructed at the Yonggwang nuclear power plant in South Korea, to compare the observed reactor neutrino fluxes. Each RENO detector is filled with 16 mass tons of Gadolinium loaded liquid scintillator (GdLS) in the neutrino target region, and with 28 mass tons of unloaded liquid scintillator (LS) in the γ-catcherγ-catcher region surrounding the target. LS was developed to satisfy chemical, physical, optical properties, and safety requirements. Linear alkyl benzene (LAB) was chosen as a solvent because of its high flash-point, sufficient light yield, and being environmentally friendly. GdLS is carefully developed to keep a long attenuation length and high light yield for a long time period. In this paper, we report the characteristics and mass production of the RENO LS and GdLS.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 04/2013; 707:45–53. · 1.14 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 01/2013; 49(9):591-592. · 1.04 Impact Factor
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    ABSTRACT: AIMS: Despite better overall survival in node-negative advanced gastric cancer (AGC), a significant proportion of patients develop recurrence and they may benefit from adjuvant therapy. The aim of this study was to evaluate the prognostic factors and recurrence pattern of node-negative AGC. METHODS: A total of 424 patients who underwent curative gastrectomy with extended lymphadenectomy for node-negative AGC between 2003 and 2005 were retrospectively reviewed. Patients with tumor involvement of adjacent organs (T4b), gastric cancer recurrence, tumor in the remnant stomach, less than 15 harvested lymph nodes, and those who received neoadjuvant chemotherapy were excluded. RESULTS: Invasion to deeper layers, undifferentiated histology, signet ring cell type compared with tubular adenocarcinoma, and tumor size larger than 6.3 cm correlated with poorer prognosis in univariate analysis. In multivariate one, however, only differentiation and depth of invasion, especially the presence of serosa involvement were significant. The 5-year survival rates of the four groups classified by differentiation and depth of invasion [T2/3 (differentiated type), T2/3 (undifferentiated type), T4a (differentiated type), and T4a (undifferentiated type)] were 98%, 92%, 80%, and 72%, respectively (P < 0.01). In terms of recurrence pattern, Lauren's type and depth of invasion were significant. Recurrence with peritoneal seeding was associated with the diffuse type and invasion into the subserosa or serosa, while hematogenous metastasis was related to the intestinal type and invasion to the proper muscle or subserosa layer. CONCLUSIONS: Differentiation and serosa involvement should be considered to stratify patients with node-negative AGC for adjuvant treatment.
    European journal of surgical oncology: the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 11/2012; · 2.56 Impact Factor
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    ABSTRACT: BACKGROUND: The efficacy of neoadjuvant chemotherapy before surgery (NCS) has not been well-established in FIGO stage IB1 to IIA cervical cancer when compared with primary surgical treatment (PST). Thus, we performed a meta-analysis to determine the efficacy of NCS in patients with FIGO stage IB1 to IIA cervical cancer when compared with PST. METHODS: We searched Pubmed, Embase and the Cochrane Library between January 1987 and September 2010. Since there was a relative lack of relevant randomized controlled trials (RCTs), we included 5 RCTs and 4 observational studies involving 1784 patients among 523 potentially relevant studies. RESULTS: NCS was related with lower rates of large tumor size (≥4 cm) (ORs, 0.22 and 0.10; 95% CI, 0.13-0.39 and 0.02-0.37) and lymph node metastasis (ORs, 0.61 and 0.38; 95% CI, 0.37-0.99 and 0.20-0.73) than PST in all studies and RCTs. Furthermore, NCS reduced the need of adjuvant radiotherapy (RT) in all studies (OR, 0.57; 95% CI, 0.33-0.98), and distant metastasis in all studies and RCTs (ORs, 0.61 and 0.61; 95% CI, 0.42-0.89 and 0.38-0.97). However, overall and loco-regional recurrences and progression-free survival were not different between the 2 treatments. On the other hand, NCS was associated with poorer overall survival in observational studies when compared with PST (HR, 1.68; 95% CI, 1.12-2.53). CONCLUSIONS: Although NCS reduced the need of adjuvant RT by decreasing tumor size and lymph node metastasis, and distant metastasis, it failed to improve survival when compared with PST in patients with FIGO stage IB1 to IIA cervical cancer.
    European journal of surgical oncology: the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology 10/2012; · 2.56 Impact Factor
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    ABSTRACT: The aim of the RENO (Reactor Experiment for Neutrino Oscillation) is to measure the smallest neutrino mixing angle, θ13θ13. The RENO detector consists of four concentric cylindrical layers: the target, γ-catcherγ-catcher, buffer and veto. Acrylic is used for the target and γ-catcherγ-catcher vessels, both of which contain liquid scintillator. Acrylic was chosen because it has good transmittance in the wavelength range of 400–430nm and also does not react with liquid-scintillating solvents. In order to reduce systematic uncertainties, the target volume should be identical to a level of less than 0.1% between the near and far detectors. Furthermore, the acrylic vessel should not have any leaks. In this paper, we investigate the optical properties, design and construction of the acrylic vessels used in the RENO detector.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 09/2012; 686:91–99. · 1.14 Impact Factor
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    ABSTRACT: The Thomson scattering diagnostic system is successfully installed in the Korea Superconducting Tokamak Advanced Research (KSTAR) facility. We got the electron temperature and electron density data for the first time in 2011, 4th campaign using a field programmable gate array (FPGA) based signal control board. It operates as a signal generator, a detector, a controller, and a time measuring device. This board produces two configurable trigger pulses to operate Nd:YAG laser system and receives a laser beam detection signal from a photodiode detector. It allows a trigger pulse to be delivered to a time delay module to make a scattered signal measurement, measuring an asynchronous time value between the KSTAR timing board and the laser system injection signal. All functions are controlled by the embedded processor running on operating system within a single FPGA. It provides Ethernet communication interface and is configured with standard middleware to integrate with KSTAR. This controller has operated for two experimental campaigns including commissioning and performed the reconfiguration of logic designs to accommodate varying experimental situation without hardware rebuilding.
    The Review of scientific instruments 09/2012; 83(9):093505. · 1.52 Impact Factor
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    ABSTRACT: We present a search for the standard model Higgs boson produced in association with a W± boson. This search uses data corresponding to an integrated luminosity of 7.5 fb-1 collected by the CDF detector at the Tevatron. We select WH→ℓνbb̅ candidate events with two jets, large missing transverse energy, and exactly one charged lepton. We further require that at least one jet be identified to originate from a bottom quark. Discrimination between the signal and the large background is achieved through the use of a Bayesian artificial neural network. The number of tagged events and their distributions are consistent with the standard model expectations. We observe no evidence for a Higgs boson signal and set 95% C.L. upper limits on the WH production cross section times the branching ratio to decay to bb̅ pairs, σ(pp̅ →W±H)×B(H→bb̅ ), relative to the rate predicted by the standard model. For the Higgs boson mass range of 100 to 150 GeV/c2 we set observed (expected) upper limits from 1.34 (1.83) to 38.8 (23.4). For 115 GeV/c2 the upper limit is 3.64 (2.78). The combination of the present search with an independent analysis that selects events with three jets yields more stringent limits ranging from 1.12 (1.79) to 34.4 (21.6) in the same mass range. For 115 and 125 GeV/c2 the upper limits are 2.65 (2.60) and 4.36 (3.69), respectively.
    Phys. Rev. D. 08/2012; 86(3).
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    ABSTRACT: We report on a study of diffractive dijet production in p̅ p collisions at √s=1.96 TeV using the CDF II detector at the Fermilab Tevatron p̅ p collider. A data sample from 310 pb-1 of integrated luminosity collected by triggering on a high transverse energy jet, ETjet, in coincidence with a recoil antiproton detected in a Roman pot spectrometer is used to measure the ratio of single-diffractive to inclusive-dijet event rates as a function of xp̅ of the interacting parton in the antiproton, the Bjorken-x, xBjp̅ , and a Q2≈(ETjet)2 in the ranges 10-3<xBjp̅ <10-1 and 102<Q2<104 GeV2, respectively. Results are presented for the region of p̅ -momentum-loss fraction 0.03<ξp̅ <0.09 and a four-momentum transfer squared tp̅ >-4 GeV2. The tp̅ dependence is measured as a function of Q2 and xBjp̅ and compared with that of inclusive single diffraction dissociation. We find weak xBjp̅ and Q2 dependencies in the ratio of single diffractive to inclusive event rates, and no significant Q2 dependence in the diffractive tp̅ distributions.
    Phys. Rev. D. 08/2012; 86(3).
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    ABSTRACT: We report a measurement of time-integrated CP-violation asymmetries in the resonant substructure of the three-body decay D0→KS0π+π- using CDF II data corresponding to 6.0 fb-1 of integrated luminosity from Tevatron pp̅ collisions at √s=1.96 TeV. The charm mesons used in this analysis come from D*+(2010)→D0π+ and D*-(2010)→D̅ 0π-, where the production flavor of the charm meson is determined by the charge of the accompanying pion. We apply a Dalitz-amplitude analysis for the description of the dynamic decay structure and use two complementary approaches, namely, a full Dalitz-plot fit employing the isobar model for the contributing resonances and a model-independent bin-by-bin comparison of the D0 and D̅ 0 Dalitz plots. We find no CP-violation effects and measure an asymmetry of ACP=(-0.05±0.57(stat)±0.54(syst))% for the overall integrated CP-violation asymmetry, consistent with the standard model prediction.
    Phys. Rev. D. 08/2012; 86(3).
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    ABSTRACT: We report a set of measurements of inclusive invariant pT differential cross sections of Λ0, Λ̅ 0, Ξ±, and Ω± hyperons reconstructed in the central region with pseudorapidity |η|<1 and pT up to 10 GeV/c. Events are collected with a minimum-bias trigger in pp̅ collisions at a center-of-mass energy of 1.96 TeV using the CDF II detector at the Tevatron Collider. As pT increases, the slopes of the differential cross sections of the three particles are similar, which could indicate a universality of the particle production in pT. The invariant differential cross sections are also presented for different charged-particle multiplicity intervals.
    Phys. Rev. D. 07/2012; 86(1).
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    ABSTRACT: Familiar facial identification is important to blind or visually impaired patients and can be achieved using a retinal prosthesis. Nevertheless, there are limitations in delivering the facial images with a resolution sufficient to distinguish facial features, such as eyes and nose, through multichannel electrode arrays used in current visual prostheses. This study verifies the feasibility of familiar facial identification under low-resolution prosthetic vision and proposes an edge-enhancement method to deliver more visual information that is of higher quality. We first generated a contrast-enhanced image and an edge image by applying the Sobel edge detector and blocked each of them by averaging. Then, we subtracted the blocked edge image from the blocked contrast-enhanced image and produced a pixelized image imitating an array of phosphenes. Before subtraction, every gray value of the edge images was weighted as 50% (mode 2), 75% (mode 3) and 100% (mode 4). In mode 1, the facial image was blocked and pixelized with no further processing. The most successful identification was achieved with mode 3 at every resolution in terms of identification index, which covers both accuracy and correct response time. We also found that the subjects recognized a distinctive face especially more accurately and faster than the other given facial images even under low-resolution prosthetic vision. Every subject could identify familiar faces even in very low-resolution images. And the proposed edge-enhancement method seemed to contribute to intermediate-stage visual prostheses.
    Journal of Neural Engineering 07/2012; 9(4):046012. · 3.28 Impact Factor
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    ABSTRACT: Using data from pp̅ collisions at √s=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, we present improved measurements of the masses and first measurements of natural widths of the four bottom baryon resonance states Σb+, Σb*+ and Σb-, Σb*-. These states are fully reconstructed in their decay modes to Λb0π± where Λb0→Λc+π- with Λc+→pK-π+. The analysis is based on a data sample corresponding to an integrated luminosity of 6.0 fb-1 collected by an online event selection based on tracks displaced from the pp̅ interaction point.
    Phys. Rev. D. 05/2012; 85(9).

Publication Stats

9k Citations
1,665.92 Total Impact Points

Institutions

  • 2003–2014
    • Pohang University of Science and Technology
      • • Department of Materials Science and Engineering
      • • Department of Physics
      Antō, North Gyeongsang, South Korea
    • Korea Atomic Energy Research Institute (KAERI)
      Daiden, Daejeon, South Korea
  • 1991–2014
    • Seoul National University
      • • Department of Physics and Astronomy
      • • College of Agriculture and Life Sciences
      • • Department of Anesthesiology
      • • Department of Applied Biology and Chemistry
      • • Department of Pharmacology
      • • College of Dentistry
      • • College of Natural Sciences
      Sŏul, Seoul, South Korea
  • 1998–2013
    • Chonbuk National University
      • Department of Physics
      Sŏul, Seoul, South Korea
    • Youngdong University
      Sŏul, Seoul, South Korea
    • Osaka University of Pharmaceutical Sciences
      • Faculty of Pharmaceutical Sciences
      Ōsaka, Ōsaka, Japan
    • Kyungnam University
      Changnyeong, South Gyeongsang, South Korea
  • 1970–2013
    • Kyungpook National University
      • • Center for High Energy Physics
      • • Computer System Engineering
      Daikyū, Daegu, South Korea
  • 2012
    • Konkuk University
      Sŏul, Seoul, South Korea
  • 2005–2012
    • Kyung Hee University
      Sŏul, Seoul, South Korea
    • Biomedical Research Institute, Rockville
      Maryland, United States
    • University of Suwon
      Suigen, Gyeonggi Province, South Korea
  • 2000–2012
    • Ajou University
      • • Department of Cardiology
      • • Department of Diagnostic Radiology
      • • Department of Obstetrics and Gynecology
      • • Department of Hematology-Oncology
      Seoul, Seoul, South Korea
    • Kyorin University
      Mitaka, Tōkyō, Japan
  • 1999–2012
    • Chungnam National University
      • • College of Medicine
      • • Department of Materials Science and Engineering
      Daiden, Daejeon, South Korea
  • 1995–2012
    • Seoul National University Hospital
      • • Department of Obstetrics and Gynecology
      • • Department of Anesthesiology and Pain Medicine
      • • Department of Orthopedic Surgery
      • • Department of Internal Medicine
      Seoul, Seoul, South Korea
    • The University of Tokyo
      Edo, Tōkyō, Japan
  • 1991–2012
    • Yonsei University Hospital
      • • Department of Internal Medicine
      • • Surgery
      Sŏul, Seoul, South Korea
  • 1970–2012
    • Sungkyunkwan University
      • • School of Medicine
      • • Department of Architectural Engineering
      • • School of Advanced Materials Science and Engineering (AMSE)
      • • School of Pharmacy
      Sŏul, Seoul, South Korea
  • 2011
    • University of Helsinki
      • Department of Physics
      Helsinki, Province of Southern Finland, Finland
  • 2010–2011
    • Dankook University
      Eidō, North Chungcheong, South Korea
    • Gyeongsang National University
      Shinshū, South Gyeongsang, South Korea
    • Korea Maritime and Ocean University
      Tsau-liang-hai, Busan, South Korea
  • 2002–2011
    • Korea Electrotechnology Research Institute-KERI
      Tsau-liang-hai, Busan, South Korea
    • Korea Basic Science Institute KBSI
      Sŏul, Seoul, South Korea
    • Hallym University
      • College of Medicine
      Seoul, Seoul, South Korea
  • 2009
    • Inha University
      • Department of Materials Engineering
      Sŏul, Seoul, South Korea
  • 1998–2009
    • Yonsei University
      • • Division of Biomedical Engineering
      • • Department of Biomedical Laboratory Science
      • • College of Nursing
      • • Department of Orthopaedic Surgery
      Seoul, Seoul, South Korea
  • 1996–2009
    • Catholic University of Korea
      • • Department of Dermatology
      • • Department of Pathology
      • • College of Medicine
      Sŏul, Seoul, South Korea
    • Cheil General Hospital
      Sŏul, Seoul, South Korea
  • 2008
    • Qingdao University
      Tsingtao, Shandong Sheng, China
  • 2000–2008
    • Pusan National University
      • • Department of Dermatology
      • • Department of Organic Material Science and Engineering
      • • Department of Biological Sciences
      Tsau-liang-hai, Busan, South Korea
  • 1999–2008
    • Inje University
      Kŭmhae, South Gyeongsang, South Korea
  • 2007
    • Korea Maritime Institute
      Sŏul, Seoul, South Korea
    • RURAL DEVELOPMENT ADMINISTRATION
      Seikan-ri, South Chungcheong, South Korea
    • Korea Institute of Nuclear Safety
      Sŏul, Seoul, South Korea
    • Seoul National University Bundang Hospital
      • Department of Anaesthesiology and Pain Medicine
      Seoul, Seoul, South Korea
    • Yeungnam University
      • Department of Microbiology
      Onyang, South Chungcheong, South Korea
  • 2006–2007
    • Georgia Institute of Technology
      • • School of Electrical & Computer Engineering
      • • Georgia Electronic Design Center
      Atlanta, GA, United States
    • Korea Research Institute of Standards and Science
      Daiden, Daejeon, South Korea
    • Hanbat National University
      Daiden, Daejeon, South Korea
    • Daewoo Engineering and Construction
      Sŏul, Seoul, South Korea
  • 2001–2007
    • Korea University
      • College of Nursing
      Sŏul, Seoul, South Korea
    • Ewha Womans University
      Sŏul, Seoul, South Korea
    • Hyundai Heavy Industries
      Urusan, Ulsan, South Korea
    • Wonju Severance Christian Hospital
      Genshū, Gangwon, South Korea
    • Sogang University
      • Department of Electronic Engineering
      Seoul, Seoul, South Korea
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea
    • Inje University Paik Hospital
      • Department of Internal Medicine
      Goyang, Gyeonggi, South Korea
  • 2005–2006
    • University of Ulsan
      • Department of Radiology
      Ulsan, Ulsan, South Korea
  • 2002–2006
    • Dongguk University
      • Quantum-functional Semiconductor Research Center
      Sŏul, Seoul, South Korea
  • 1999–2006
    • Samsung Advanced Institute of Technology
      Usan-ri, Gyeonggi Province, South Korea
  • 1970–2005
    • University of Illinois, Urbana-Champaign
      Urbana, Illinois, United States
  • 2004
    • Stanford University
      • Department of Materials Science and Engineering
      Palo Alto, CA, United States
  • 1995–2004
    • Korea Research Institute of Bioscience and Biotechnology KRIBB
      • • Laboratory of Plant Genomics
      • • Anticancer Research Laboratory
      • • Natural Product Biosynthesis Research Unit
      Ansan, Gyeonggi, South Korea
  • 1999–2003
    • Korea Advanced Institute of Science and Technology
      • • Department of Physics
      • • Department of Electrical Engineering
      Seoul, Seoul, South Korea
  • 1993–2003
    • Hanyang University
      • • College of Medicine
      • • Division of Materials Science and Engineering (MSE)
      Ansan, Gyeonggi, South Korea
    • Keimyung University
      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
  • 1999–2002
    • Soonchunhyang University
      Onyang, South Chungcheong, South Korea
  • 1992–2002
    • Chungbuk National University
      • College of Pharmacy
      Tyundyu, North Chungcheong, South Korea
  • 2000–2001
    • Chosun University
      Gwangju, Gwangju, South Korea
    • CHA University
      • College of Medicine
      Seoul, Seoul, South Korea
  • 1995–2001
    • Okayama University
      • Faculty of Pharmaceutical Science
      Okayama, Okayama, Japan
  • 1998–2000
    • University of Oxford
      • Department of Psychiatry
      Oxford, ENG, United Kingdom
  • 1997–2000
    • Korea Institute of Science and Technology
      Sŏul, Seoul, South Korea
    • Jilin Agricultural University
      Hsin-ching, Jilin Sheng, China
    • Wonkwang University
      Riri, North Jeolla, South Korea
  • 1996–1999
    • McGill University
      Montréal, Quebec, Canada
  • 1993–1998
    • International St. Mary's Hospitals
      Chemulpo, Incheon, South Korea
  • 1996–1997
    • Kyoto University
      • Department of Molecular and Cellular Biology
      Kyoto, Kyoto-fu, Japan
    • Chonnam National University
      • Department of Otolaryngology and Head and Neck Surgery
      Yeoju, Gyeonggi, South Korea
  • 1994–1997
    • University of Mississippi Medical Center
      • Department of Pharmacology and Toxicology
      Jackson, MS, United States