Jong Min Kim

Chung-Ang University, Sŏul, Seoul, South Korea

Are you Jong Min Kim?

Claim your profile

Publications (309)1162.36 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Resistive random access memory (ReRAM) is a promising candidate for future nonvolatile memories (NVM). Resistive switching (RS) in a metal-insulator-metal (MIM) structure is generally assumed to be caused by the formation/rupture of nanoscale conductive filaments (CFs) under an applied electric field. The critical issue of ReRAM for practical memory applications, however, is insufficient repeatability of the operating voltage and resistance ratio. Here, we present an innovative approach to reliably and reproducibly control the CF growth in unipolar NiO resistive memory by exploiting uniform formation of insulating SiOx nanostructures from the self-assembly of a Si-containing block copolymer (BCP). In this way, the standard deviation (SD) of set and reset voltages was markedly reduced by 76.9% and 59.4%, respectively. The SD of high resistance state (HRS) also decreased significantly, from 6.3 x 10(7) Ω to 5.4 x 10(4) Ω. Moreover, we report direct observations of localized metallic Ni CF formation and their controllable growth using electron microscopy and discuss electro-thermal simulation results based on the finite element method (FEM) supporting our analysis results.
    ACS Nano 09/2014; · 12.03 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We sought to investigate the effect of ward-to-cath lab blood pressure (BP) differences on long-term clinical outcomes in patients undergoing percutaneous coronary intervention (PCI) with drug-eluting stent (DES). There are limited data available on the association between PCI with DES and BP differences on long-term clinical outcomes. This study enrolled 994 patients who underwent PCI with DES from March 2003 to August 2007. Resting BP was measured in a ward environment before transfer to the cardiac catheterization lab (cath lab), and again when the patient was laid down on the cath lab table. Patients were divided into two groups according to the difference in ward-to-cath lab systolic BP. Large difference group (n = 383) was defined as the absolute systolic difference of >20 mmHg and small difference group (n = 424) as the absolute systolic difference of ≤20 mmHg. The primary endpoints were all-cause mortality, cardiac death, nonfatal myocardial infarction and stroke. A total of 807 patients (mean age 60 ± 10 years, 522 males) received follow-up for 5.1 ± 2.4 years. The rate of all-cause mortality was significantly higher in the large difference group compared to the small difference group (6.6 vs. 2.8 %; adjusted hazard ratio (HR) 2.43; 95 % confidence interval (CI) 1.22-4.83; p = 0.012). There were higher cardiac deaths seen in the large difference group compared to the small difference group (3.9 vs. 1.4 %; adjusted HR 2.84; 95 % CI 1.1-7.31; p = 0.031). Stroke (2.4 vs. 1.2 %, p = 0.125) and TVR (3.7 vs. 1.7 %, p = 0.051) had higher trends in the large difference group compared to the small difference group. The composite of primary endpoints (all-cause mortality, cardiac death, nonfatal MI and stroke) occurred more frequently in the large difference group compared to the small difference group (10.0 vs. 6.4 %; adjusted HR 1.71; 95 % CI 1.04-2.81; p = 0.033). A difference in ward-to-cath lab systolic BP of >20 mmHg may contribute to increased adverse outcomes in the form of all-cause mortality and cardiac deaths in patients undergoing PCI with DES.
    Heart and vessels. 07/2014;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The six-minute walk test has been widely used in people with chronic cardiopulmonary disorders as an outcome assessment with regards to therapeutic or prognostic determinants. This study was undertaken to determine the six-minute walk distance (6MWD) in a sample of healthy Koreans and to create a reference equation. We also compared the 6MWD of our cohort with previously published equations.
    Tuberculosis and Respiratory Diseases 06/2014; 76(6):269-75.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Polymer-free drug-eluting stents (DES) may overcome the shortcomings of polymer-based DES. The aim of this study was to examine the effect of the polymer-free TiO2 film-coated stent with abciximab or alpha lipoic acid in a porcine coronary overstretch restenosis model.
    Journal of cardiology. 05/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The present study presents a new dielectrophoresis (DEP) manipulation technique using a movable liquid electrode, which allows manipulation of particles by actively controlling the locations of electrodes and applying on-off electric input signals. This DEP system consists of mercury as a movable liquid electrode, indium tin oxide (ITO)-coated glass, SU-8-based micro-channels for electrode passages, and a polydimethylsiloxane (PDMS) medium chamber. A simple squeezing method was introduced to build a thin PDMS layer at the bottom of the medium chamber to create a contactless DEP system. To determine the operating conditions, the DEP force and the friction force were analytically compared for a single cell. In addition, an appropriate frequency range for effective DEP manipulation was chosen based on an estimation of the Clausius-Mossotti (CM) factor and the effective complex permittivity of the yeast cell using the concentric shell model. With this system, we demonstrated the active manipulation of yeast cells, and measured the collection efficiency and the dielectrophoretic velocity of cells for different AC electric field strengths and applied frequencies. The experimental results showed that the maximum collection efficiency reached was approximately 90%, and the dielectrophoretic velocity increased with increasing frequency and attained the maximum value of 10.85±0.95 μm/s at 100 kHz, above which it decreased.This article is protected by copyright. All rights reserved
    Electrophoresis 04/2014; · 3.26 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Many demineralized bone matrix (DBM) products are available with different formulation, bone composition or carrier molecules. Here we compared bone healing capacity of three different DBM products with either different carrier molecules (hyaluronic acid (HA) vs carboxymethylcellulose (CMC)) or different bone composition (cortical bone vs cortical bone and cancellous bone) in a rabbit segmental defect model. Each 15-mm segmental defect in both left and right radiuses was created in 36 New Zealand White rabbits and filled either with HA-based demineralized cortical bone matrix (DBX), CMC-based demineralized cortical bone matrix (DB) or CMC-based demineralized cortical bone with cancellous bone (NDDB) in random order. Additional two rabbits as control were used to no treatment and they were used to radiographic examination only during 12 weeks post-operation. Four rabbits from each group were sacrificed at 4, 8, and 12 weeks post-implantation. The wound area was evaluated by X-ray radiology, micro-computerized tomography (CT) and histopathology. DBX has significantly lower radiopacity, bone volume fraction, and bone mineral density compared to DB and NDDB before implantation. However, there were no significant differences in bone healing capacity as revealed by similar bone healing score, bone volume fraction, bone mineral density, and residual bone area in radiographic assessment, micro-CT, and histological evaluation at 4, 8, and 12 weeks post-implantation. In conclusion, three DBM products with different carrier molecules or bone composition showed similar bone healing capacity in a segmental bone defect model in rabbits.
    Journal of veterinary science (Suwŏn-si, Korea) 03/2014; · 0.89 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We tried to determine the effect of stent balloon inflation time on stent expansion and apposition using optical coherence tomography. Second-generation drug-eluting stents (DES) have thin struts; however, inflation times for optimal stent expansion and apposition are unknown in vivo. Subjects included 17 patients (18 de novo coronary artery lesions), in whom Resolute Integrity → (n = 9) and Xience Prime → (n = 9) DES were deployed. All stents were inflated 3 times to the nominal inflation pressure (8.9 ± 0.6 atm) using the stent delivery balloon. The first inflation continued until the stent was angiographically fully expanded; the other 2 lasted 15 and 30 seconds, respectively. After the first, second, and third inflation of stent balloon, stent area (5.94 ± 1.7, 6.69 ± 1.8, 7.05 ± 1.8 mm(2) , P < 0.001) and stent volume (146.94 ± 59.40, 166.78 ± 69.55, 177.25 ± 69.19 mm(3) , P < 0.001) increased significantly. The number of malapposed struts (18.0 ± 17.0, 7.9 ± 10.2, 7.4 ± 10.8, P < 0.001) and the mean depth of malapposed struts (188.9 ± 75.6, 120.3 ± 101.4, 95.4 ± 86.8 µm, P < 0.001) decreased. Malapposed stent area (0.62 ± 0.32, 0.52 ± 0.21 mm(2) , P < 0.05) and the malapposed stent volume (15.03 ± 7.78, 12.64 ± 5.16 mm(3) , P < 0.05) decreased significantly following the second inflation; the third inflation gave no additional benefits to these parameters. There was no adverse clinical outcome after each stent balloon inflation. Additional 15 seconds of inflation after the angiographically full expansion of the stent balloon allows better stent expansion and apposition even though the inflation pressure is nominal pressure.
    Journal of Interventional Cardiology 03/2014; · 1.50 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: It is well known that the hippocampus plays a role in spatial and contextual memory, and that spatial information is tightly regulated by the hippocampus. However, it is still highly controversial whether the hippocampus plays a role in object recognition memory. In a pilot study, the administration of bicuculline, a GABAA receptor antagonist, enhanced memory in the passive avoidance task, but not in the novel object recognition task. In the present study, we hypothesized that these different results are related to the characteristics of each task and the different roles of hippocampus and perirhinal cortex. A region-specific drug-treatment model was employed to clarify the role of the hippocampus and perirhinal cortex in object recognition memory. After a single habituation in the novel object recognition task, intra-perirhinal cortical injection of bicuculline increased and intra-hippocampal injection decreased the exploration time ratio to novel object. In addition, when animals were repeatedly habituated to the context, intra-perirhinal cortical administration of bicuculline still increased exploration time ratio to novel object, but the effect of intra-hippocampal administration disappeared. Concurrent increases of c-Fos expression and ERK phosphorylation were observed in the perirhinal cortex of the object with context-exposed group either after single or repeated habituation to the context, but no changes were noted in the hippocampus. Altogether, these results suggest that object recognition memory formation requires the perirhinal cortex but not the hippocampus, and that hippocampal activation interferes with object recognition memory by the information encoding of unfamiliar environment.
    Brain research 01/2014; · 2.46 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Restriction fragment length polymorphism (RFLP) analysis is one of the oldest, most convenient and least expensive methods of genotyping, but is limited by the availability of restriction endonuclease sites. Here we present a novel method of employing CRISPR/Cas-derived RNA-guided engineered nucleases (RGENs) in RFLP analysis. We prepare RGENs by complexing recombinant Cas9 protein derived from Streptococcus pyogenes with in vitro transcribed guide RNAs that are complementary to the DNA sequences of interest. Then, we genotype recurrent mutations found in cancer and small insertions or deletions (indels) induced in cultured cells and animals by RGENs and other engineered nucleases such as transcription activator-like effector nucleases (TALENs). Unlike T7 endonuclease I or Surveyor assays that are widely used for genotyping engineered nuclease-induced mutations, RGEN-mediated RFLP analysis can detect homozygous mutant clones that contain identical biallelic indel sequences and is not limited by sequence polymorphisms near the nuclease target sites.
    Nature Communications 01/2014; 5:3157. · 10.02 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A multi-level microstructure is proposed for terahertz slow-wave circuits, with dispersion relation retrieved by scattering parameter measurements. The measured return loss shows strong resonances above the cutoff with negligible phase shifts compared with finite element analysis. Splitting the circuit into multi levels enables a low aspect ratio configuration that alleviates the loading effect of deep-reactive-ion etching on silicon wafers. This makes it easier to achieve flat-etched bottom and smooth sidewall profiles. The dispersion retrieved from the measurement, therefore, corresponds well to the theoretical estimation. The result provides a straightforward way to the precise determination of dispersions in terahertz vacuum electronics.
    Applied Physics Letters 01/2014; 104(2):021118. · 3.79 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: •Presynaptic dopaminergic depletions have been reported in one case each of sCJD and variant CJD by image of presynaptic dopaminergic system.•This report is a CJD case which show relatively preserved presynaptic dopaminergic system despite the existence of rapidly progressive severe parkinsonism•Mechanism of parkinsonism in early CJD can be assumed to be involved post-synaptic dopaminergic system or non-dopaminergic system as well as presynaptic dopaminergic system.
    Journal of the Neurological Sciences. 01/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cu foils of 2 × 2 cm2 have been implanted with 70 keV C− ions to nominal fluences of (2–10) × 1015 cm−2 at room temperature (RT) and subsequently annealed at 900–1100 °C for 15 min, before being cooled to RT to form graphene layers on the Cu surfaces. Analyses with Raman spectroscopy and atomic force microscopy demonstrate that a continuous film of bi-layer graphene (BG) is produced for implant fluences as low as 2 × 1015 cm−2, much less than the carbon content of the BG films. This suggests that the implanted carbon facilitates the nucleation and growth of graphene, with additional carbon supplied by the Cu substrate (0.515 ppm carbon content). No graphene was observed on unimplanted Cu foils subjected to the same thermal treatment. This implantation method provides a novel technique for the selective growth of graphene on Cu surfaces.
    Carbon. 01/2014; 66:267–271.
  • [Show abstract] [Hide abstract]
    ABSTRACT: We demonstrate the fabrication of solution based low temperature-processed p-type ZnO NRs doped with phosphorous by using a spin-on-dopant method coupled with a hydrothermal process. We confirmed the incorporation of phosphorous dopants into a ZnO crystal by analyzing SIMS profiles, together with the evolution of the photoluminescence spectra. It is further revealed that the electrical properties of the p-type ZnO/n-type Si heterojunction diode exhibited good rectifying behavior, confirming that p-type ZnO NRs were successfully formed. In addition, we demonstrate that a piezoelectric nanogenerator with p-type ZnO NRs made on a glass substrate shows large enough power to drive polymer dispersed liquid crystal displays.
    Nanoscale 12/2013; · 6.73 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We report a systematic and reliable approach to fabricate ZnO nanocone or nanoneedle arrays on various substrates including fibers. Our approach employs wet chemical etching of ZnO nanowire arrays using an aqueous solution of HCl. Using this simple chemical etching technique, nanowire arrays were transformed to nanocone arrays on Si substrates and Kevlar fibers. Significant enhancement of light emission intensities at UV peak (∼387 nm) was observed when the ZnO nanowire arrays are converted to ZnO nanocone arrays. The photoluminescence intensities at the UV peaks from the nanocones are found to be ∼3–4 times larger than those from the nanowires.
    Physica Status Solidi (A) Applications and Materials 12/2013; 210(12). · 1.53 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Statins have pleiotropic effects, which include the inhibition of neointima hyperplasia, the inhibition of vascular inflammation, and platelet inhibition. The aim of this study was to examine the effect of an atorvastatin-eluting stent (AES) in a rabbit iliac artery overstretch restenosis model. Ten rabbits were used in this study (10 rabbits, 10 iliac arteries for each stent). An AES and paclitaxel-eluting stent (PES) were implanted in the left and right iliac arteries in a rabbit (2 stents in each rabbit). The stents were deployed with oversizing (stent/artery ratio 1.3:1), and histopathologic analysis was assessed at 28 days after stenting. There were no significant differences in the injury score, lumen area, or inflammation score. There were significant differences in the neointimal area (0.7±0.18 mm(2) in the AES group vs. 0.4±0.25 mm(2) in the PES group, p<0.01), in the percentage stenosis area (14.8±5.06% in the AES group vs. 10.5±6.80% in the PES group, p<0.05), and in the fibrin score (0.4±0.51 in the AES group vs. 2.7±0.48 in the PES group, p<0.001). Although the AES did not suppress neointimal hyperplasia compared with the PES, it showed a superior arterial healing effect in a rabbit iliac artery overstretch restenosis model.
    Chonnam medical journal. 12/2013; 49(3):118-24.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Danggui-Jakyak-San (DJS), a traditional herbal prescription, has been used to treat insufficient blood supplies. Recently, regenerative medication for the treatment of cerebral ischemia has drawn the attention of many researchers. In this study, we examined whether DJS exerts a neuronal regenerative effect in the hippocampus of a transient forebrain ischemia mice model. Transient forebrain ischemia was induced by bilateral common carotid artery occlusion (BCCAO). Animals were divided into three groups (sham, BCCAO + vehicle, and BCCAO + DJS). To test the effect of DJS on learning and memory, Morris water maze or passive avoidance test was conducted. To test neuroprotective and neurogenic effect, immunohistochemistry and Western blot analysis were used. Statistical significance was analyzed with Student t-test, one-way or two-way analysis of variance. We found that the administration of DJS ameliorated ischemia-induced spatial memory impairment in the Morris water maze task. Moreover, Akt/glycogen synthase kinase-3beta (GSK3beta)/beta-catenin signaling was increased by DJS, which would be one possible mechanism of DJS for neurogenesis in the hippocampal dentate gyrus region. These results suggest that DJS is a possible candidate for the treatment of ischemia-induced neuronal degeneration.
    BMC Complementary and Alternative Medicine 11/2013; 13(1):324. · 2.08 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: RNA-guided endonucleases (RGENs), derived from the prokaryotic Type II CRISPR-Cas system, enable targeted genome modification in cells and organisms. Here we describe the establishment of gene-knockout mice and zebrafish by the injection of RGENs as Cas9 protein:guide RNA complexes or Cas9 mRNA plus guide RNA into one-cell-stage embryos of both species. RGENs efficiently generated germline transmittable mutations in up to 93% of newborn mice with minimal toxicity. RGEN-induced mutations in the mouse Prkdc gene that encodes an enzyme critical for DNA double-strand break repair resulted in immunodeficiency both in F0 and F1 mice. We propose that RGEN-mediated mutagenesis in animals will greatly expedite the creation of genetically engineered model organisms, accelerating functional genomic research.
    Genome Research 11/2013; · 14.40 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Sporadic spastic paraplegia (SSP) and hereditary spastic paraplegia (HSP) belong to a clinical and genetically heterogeneous group of disorders characterized by progressive spasticity and weakness in the lower extremities. The symptoms are associated with pyramidal tract dysfunction and degeneration of the corticospinal tracts. Parkinsonism is uncommon in SSP/HSP patients. However, both disorders are associated with damage to the nigrostriatal dopaminergic system. In the present study, the clinical features of patients with SSP/HSP were investigated, and nigrostriatal dopaminergic binding potential was assessed using dopamine transporter (DAT) single-photon emission computer tomography (SPECT). Nine patients with spastic paraplegia participated in the present study. The subjects underwent DAT SPECT using the agent [2-[[2-[[[3-(4-chlorophenyl)-8-methyl-8-azabicyclo[3,2,1]oct-2-yl]methyl](2-mercaptoethyl)amino]ethyl]amino]ethanethiolato (3-)-N2,N20,S2,S20]oxo-[IR-(exo-exo)])-[(99)mTc]technetium ([(99)mTc]TRODAT-1). The [(99)mTc]TRODAT-1 SPECT images of five patients appeared normal, whereas the images of four patients revealed reduced striatal ligand uptake. Among the four patients with reduced uptake, two had parkinsonism, and one exhibited periodic limb movements and restless leg syndrome. Our DAT SPECT imaging study shows that reduced DAT density may be observed in patients with parkinsonism. The results of the present study offer an explanation for the spectrum of spastic paraplegia symptoms and the progression of the disorder.
    Journal of Korean medical science 11/2013; 28(11):1661-1666. · 0.84 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to examine the histolopathogical effects among the biolimus, zotarolimus, and everolimus eluting stent (EES) in the porcine coronary restenosis model. Pigs were randomized into three groups in which the coronary arteries (15 pigs, 10 coronaries in each group) had either a biolimus A9 eluting stent (BES, n=10), zotarolimus eluting stent (ZES, n=10) or an EES (n=10). Histopathologic analysis was performed at 28 days after stenting. There were no significant differences in the injury score among the three groups. There was a significant difference in the internal elastic lamina, lumen area, neointima area, percent area stenosis, and the fibrin and inflammation score among the three groups (4.3±0.53 mm(2), 2.5±0.93 mm(2), 1.8±1.03 mm(2), 40.7±20.80%, 1.7±0.41, 1.4±0.72 in the BES group vs. 5.1±0.55 mm(2), 2.3±1.14 mm(2), 2.8±1.00 mm(2), 55.4±21.23%, 2.0±0.39, 1.6±0.76 in the ZES group vs. 4.4±0.53 mm(2), 1.7±1.22 mm(2), 2.8±1.23 mm(2), 64.0±26.00%, 1.8±0.76, 2.1±0.90 in the EES group, respectively). BES is more effective in inhibiting neointimal hyperplasia compared to ZES and EES (p<0.0001). According to the fibrin and inflammation score, BES and EES are more effective in decreasing the fibrin deposition compared to ZES (p<0.001). Moreover, BES and ZES are more effective in reducing the inflammatory reaction compared to EES (p<0.001). The result demonstrates that BES shows better histopathological characteristics than ZES and EES at one month after stenting in the porcine coronary restenosis model.
    Korean Circulation Journal 11/2013; 43(11):744-51.
  • [Show abstract] [Hide abstract]
    ABSTRACT: To compare the effects of intravenous amantadine and placebo therapy on freezing of gait in patients with Parkinson's disease, this randomized, double-blind, placebo-controlled, multicenter trial compared the efficacy of 5 days intravenous amantadine and placebo treatments on freezing of gait in 42 subjects randomly allocated 2:1 to amantadine or placebo groups. Changes in freezing of gait questionnaire (FOG-Q) scores and in unified Parkinson's disease rating scale (UPDRS) scores, from baseline to immediately (V1) and 1 month (V2) after treatments, were assessed. Among the 42 patients (amantadine n = 29, placebo n = 13, a mean age 65.5 ± 9.4 years and a mean FOG-Q score 17.4 ± 3.2), 40 subjects completed treatment. There was no significant group difference on the primary outcome measure as total FOG-Q score changes at V1. However a significant beneficial effect of amantadine on freezing was seen at V2 in the UPDRS Part II freezing and FOG-Q item 3 scores, and there was significant improvement in the UPDRS Part IV total score and in the UPDRS Part II getting out of bed score in the amantadine group at both V1 and V2. There was no serious adverse event reported during the study. The intravenous amantadine therapy did not show a significant improvement on overall FOG-Q scores in patients with moderate-to-severe freezing; however, it might be beneficial by attenuating freezing severity and improving patients' mobility. To prove this finding further studies with larger sample sizes are warranted in the future.
    Journal of Neurology 09/2013; · 3.58 Impact Factor

Publication Stats

4k Citations
1,162.36 Total Impact Points

Institutions

  • 2014
    • Chung-Ang University
      • School of Mechanical Engineering
      Sŏul, Seoul, South Korea
    • Chonnam National University Hospital
      Sŏul, Seoul, South Korea
    • Daegu Fatima Hospital
      Yeoncheon Gun, South Korea
  • 2012–2014
    • Seoul National University Bundang Hospital
      • Department of Neurology
      Sŏul, Seoul, South Korea
    • Kyonggi University
      • Department of Convergence Security
      Sŏul, Seoul, South Korea
  • 2009–2014
    • Kyung Hee University
      • • Department of Applied Physics
      • • Department of Life and Nanopharmaceutical Science
      Sŏul, Seoul, South Korea
  • 1999–2014
    • Samsung Advanced Institute of Technology
      Usan-ri, Gyeonggi Province, South Korea
  • 1997–2014
    • Seoul National University
      • • Department of Chemistry
      • • School of Computer Science and Engineering
      • • Department of Computer Science and Engineering
      Sŏul, Seoul, South Korea
  • 2013
    • University of Oxford
      Oxford, England, United Kingdom
  • 2012–2013
    • Korea Advanced Nano Fab Center
      Whasung-Gun, Gyeonggi Province, South Korea
  • 2009–2013
    • Yonsei University
      • Department of Mechanical Engineering
      Sŏul, Seoul, South Korea
  • 2002–2013
    • Korea Advanced Institute of Science and Technology
      • • Department of Materials Science and Engineering
      • • Department of Bio and Brain Engineering
      • • Department of Mechanical Engineering
      Sŏul, Seoul, South Korea
  • 1995–2013
    • Dong-A University
      • • Department of Chemical Engineering
      • • Department of Obstetrics and Gynecology
      • • College of Medicine
      Pusan, Busan, South Korea
  • 2011–2012
    • Georgia Institute of Technology
      • School of Materials Science and Engineering
      Atlanta, GA, United States
    • Kyungpook National University Hospital
      Sŏul, Seoul, South Korea
    • Chungbuk National University
      • College of Veterinary Medicine
      South Korea
  • 2008–2012
    • Stanford University
      • Department of Chemical Engineering
      Stanford, CA, United States
  • 2005–2012
    • Pusan National University
      • • Department of Microbiology
      • • College of Medicine
      Pusan, Busan, South Korea
    • Chonbuk National University
      • Department of Organic Materials and Fiber Engineering
      Seoul, Seoul, South Korea
  • 2003–2012
    • Sungkyunkwan University
      • • Institute of Basic Science
      • • School of Advanced Materials Science and Engineering (AMSE)
      • • School of Mechanical Engineering
      • • Department of Physics
      Sŏul, Seoul, South Korea
  • 2010–2011
    • Sejong University
      • Faculty of Bioscience and Biotechnology
      Seoul, Seoul, South Korea
    • Yeungnam University
      • Department of Urology
      Onyang, South Chungcheong, South Korea
    • National Institute of Environmental Research
      Sŏul, Seoul, South Korea
  • 2006–2011
    • Korea Institute of Oriental Medicine
      Bucheon, Gyeonggi Province, South Korea
  • 2009–2010
    • Peking University
      • • College of Chemistry and Molecular Engineering
      • • State Key Laboratory for Structural Chemistry of Unstable and Stable Species
      Beijing, Beijing Shi, China
  • 2008–2010
    • Gyeongsang National University
      • Division of Applied Life Science
      Chinju, South Gyeongsang, South Korea
  • 2004–2008
    • Osaka University
      • The Institute of Scientific and Industrial Research (ISIR)
      Ibaraki, Osaka-fu, Japan
  • 2006–2007
    • Yonsei University Hospital
      • Department of Internal Medicine
      Seoul, Seoul, South Korea
  • 2002–2004
    • Gwangju Institute of Science and Technology
      • School of Information and Communications
      Kwangju, Gwangju, South Korea
  • 1998–1999
    • Hanyang University
      • Division of Chemical Engineering and Bioengineering
      Sŏul, Seoul, South Korea
  • 1996
    • Korea Atomic Energy Research Institute (KAERI)
      Daiden, Daejeon, South Korea
  • 1987
    • Kyoto University
      • Division of Applied Life Sciences
      Kyoto, Kyoto-fu, Japan