Sang Woo Kim

Emory University, Atlanta, Georgia, United States

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Publications (378)790.64 Total impact

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    ABSTRACT: Acinetobacter nosocomialis is an important nosocomial pathogen that causes a variety of human infections. However, the specific virulence factors of this microorganism have not yet been determined. We investigated the role of outer membrane protein A (OmpA) in the pathogenesis of A. nosocomialis. A ΔompA mutant of the A. nosocomialis ATCC 17903(T) strain was constructed using markerless gene deletion. The ΔompA mutant displayed reduced biofilm formation in polystyrene tubes and reduced adherence to A549 cells in comparison to the wild-type strain. These virulence traits of the ΔompA mutant strain were restored when the ompA gene was complemented. Cytotoxicity was not significantly different between the wild-type strain and the ΔompA mutant when A549 cells were infected with bacteria or treated with outer membrane vesicles (OMVs). However, OMVs from the wild-type strain induced cytotoxicity in HEp-2 cells, whereas OMVs from the ΔompA mutant did not induce cytotoxicity. Proteomic analysis of OMVs revealed that OmpA influenced the distribution of envelope and periplasmic proteins. Overall, this study is the first report that links OmpA to A. nosocomialis pathogenesis, and highlights OmpA as a putative target to develop anti-virulence agents or vaccines against A. nosocomialis infection.
    No preview · Article · Jan 2016 · Virulence
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    ABSTRACT: Purpose: To report a case of recalcitrant epithelial ingrowth after small incision lenticule extraction (SMILE) treated successfully with a novel hydrogel ocular sealant. Methods: Case report and literature review. Results: A 32-year-old man who underwent small incision lenticule extraction (SMILE) complicated by difficult lenticule extraction developed visually significant epithelial ingrowth. He then underwent two flap lifts and epithelial scrapings and flap edge suturing with recurrence of epithelial ingrowth despite these interventions. He subsequently underwent repeat scraping, followed by hydrogel ocular sealant placement (ReSure Sealant; Ocular Therapeutix, Inc., Bedford, MA), which prevented recurrence of epithelial ingrowth and reduced corneal haze. The patient was also found to have undiagnosed diabetes, suggesting that just as in LASIK, diabetes may be a risk factor for epithelial ingrowth after SMILE. Conclusions: Interface epithelial ingrowth is a potential complication after SMILE and diabetes may be a risk factor for this complication. Hydrogel ocular sealant may be effective after SMILE to prevent epithelial ingrowth into the interface. [J Refract Surg. 2015;31(12):847-850.].
    No preview · Article · Dec 2015 · Journal of refractive surgery (Thorofare, N.J.: 1995)
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    ABSTRACT: We develop an advanced electrospinning process that uses an electrostatic spiral collecting coil and a converging coil to produce a polyacrylonitrile (PAN) polymer fiber with a nanometer-sized diameter. The electrostatic spiral collecting coil was used as a collector on which to deposit a continuous and aligned PAN polymer fiber, and the converging coil was used to adjust the collecting area of the fibers. The fiber bundles were continuously withdrawn from the spiral collector, and to estimate the behavior of the fibers, equipotential lines were calculated for the electrospinning system by using a 3D simulation program. A high-speed camera and a magnifying camera were used to observe the actual behavior of the fibers. In this study, the interval distance of the spiral collecting coil was adjusted to obtain bundles of with various diameters for use in various applications. The average diameter of the fibers is of about 250 nm, and the range of the average diameter of the bundles is between 30 μm and 120 μm. Among the fiber bundles, around 90 μm of the bundle was best well-aligned and its fracture force and strain strength were of around 80 mN and 12.6 MPa before the stabilization process.
    Full-text · Article · Dec 2015
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    Jewon Lee · Seokbae Moon · Hyeyun Jeong · Sang Woo Kim
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    ABSTRACT: This paper proposes a diagnosis method for a multipole permanent magnet synchronous motor (PMSM) under an interturn short circuit fault. Previous works in this area have suffered from the uncertainties of the PMSM parameters, which can lead to misdiagnosis. The proposed method estimates the q-axis inductance (Lq) of the faulty PMSM to solve this problem. The proposed method also estimates the faulty phase and the value of G, which serves as an index of the severity of the fault. The q-axis current is used to estimate the faulty phase, the values of G and Lq. For this reason, two open-loop observers and an optimization method based on a particle-swarm are implemented. The q-axis current of a healthy PMSM is estimated by the open-loop observer with the parameters of a healthy PMSM. The Lq estimation significantly compensates for the estimation errors in high-speed operation. The experimental results demonstrate that the proposed method can estimate the faulty phase, G, and Lq besides exhibiting robustness against parameter uncertainties.
    Preview · Article · Nov 2015 · Sensors
  • Daehyun Kim · Taedong Goh · Minjun Park · Sang Woo Kim
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    ABSTRACT: We propose a state-of-charge (SOC) estimation method for Li-ion batteries that combines a fuzzy sliding mode observer (FSMO) with grey prediction. Unlike the existing methods based on a conventional first-order sliding mode observer (SMO) and an adaptive gain SMO, the proposed method eliminates chattering in SOC estimation. In this method, which uses a fuzzy inference system, the gains of the SMO are adjusted according to the predicted future error and present estimation error of the terminal voltage. To forecast the future error value, a one-step-ahead terminal voltage prediction is obtained using a grey predictor. The proposed estimation method is validated through two types of discharge tests (a pulse discharge test and a random discharge test). The SOC estimation results are compared to the results of the conventional first-order SMO-based and the adaptive gain SMO-based methods. The experimental results show that the proposed method not only reduces chattering, but also improves estimation accuracy.
    No preview · Article · Nov 2015 · Energies
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    ABSTRACT: Affine projection sign algorithm (APSA) is a useful adaptive filter for a highly correlated input signal in the presence of impulsive noise. In this study, a novel variable step-size APSA is proposed using selective input vectors to achieve both fast convergence rate and low steady-state mean-square deviation (MSD) with low computational cost. The selective input vectors and step size are chosen so as to maximize the theoretical MSD difference derived using Price׳s theorem. The simulation results show that the proposed algorithm has the fastest convergence rate and lowest steady-state MSD when compared with recent variable step-size APSAs. Moreover, it effectively reduces computational cost.
    No preview · Article · Oct 2015 · Signal Processing
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    Chang Gi Yeo · Ikchan Jeon · Sang Woo Kim
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    ABSTRACT: Prompt and accurate diagnosis of cervical spine injury is important to prevent the catastrophic results that can be caused by undetected lesions. Delayed or missed diagnosis of cervical spine injury occurs with an incidence of 5 to 20% according to previous studies. In this study, we report four cases of cervical instability without initial radiologic evidence. These cases demonstrate that dynamic flexion and extension radiographies can be a proper choice of modality to diagnose and exclude the possibility of cervical instability in a patient with a suspicious ligament injury on the static radiographies following acute cervical trauma.
    Preview · Article · Oct 2015
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    ABSTRACT: Backgroud: Low back pain is associated with transversus abdominis (TrA) dysfunction. Recently, it was proposed that Neuromuscular Electrical Stimulation (NMES) could be used to stimulate deep abdominal muscle contractions and improve lumbopelvic stability. Objective: The purpose of this study was to determine the optimal stimulation frequency required during NMES for the activation of deep abdominal muscles. Methods: Twenty healthy volunteers between the ages of 24 and 32 were included. The portable research-stimulator was applied using a 10 second contraction time, and a 10 second resting time at 20 Hz, 50 Hz, and 80 Hz. Changes in muscle thicknesses were determined for the TrA, obliquus internus (OI), and obliquus externus (OE) by real time ultrasound imaging. Results: Significant thickness increases in the TrA, OI, and OE were observed during NMES versus the resting state (p < 0.05). Of the frequencies examined, 50 Hz NMES produced the greatest increase in TrA thickness (1.33 fold as compared with 1.22 fold at 20 Hz and 1.21 fold at 80 Hz) (p < 0.05). Conclusions: Our results indicate that NMES can preferentially stimulate contractions in deep abdominal stabilizing muscles. Most importantly, 50 Hz NMES produced greater muscle thickness increases than 20 or 80 Hz.
    No preview · Article · Oct 2015 · Journal of Back and Musculoskeletal Rehabilitation
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    ABSTRACT: Background: Reconstruction of three-dimensional lower extremity defects is challenging because the dead space should be filled and the surface defect should be covered to prevent complications. We present our experience using the vastus lateralis muscle-chimeric anterolateral thigh (ALT) free flap for reconstructing three-dimensional lower extremity defects. Methods: This report describes 12 cases of three-dimensional lower extremity defects that were treated via reconstruction using a chimeric ALT free flap between October 2010 and January 2015. The defects involved the foot (10 patients), distal lower leg (1 patient), and proximal lower leg (1 patient). The sizes of the surface defects ranged from 7.5 × 3 cm(2) to 16 × 7 cm(2) , and the sizes of the estimated dead spaces ranged from 2 × 3 cm(2) to 8 × 5 cm(2) . The skin and muscle segment sizes were also evaluated. Results: The sizes of the skin flaps ranged from 8 × 4 cm(2) to 17.5 × 8 cm(2) , and the sizes of the muscle segments ranged from 2 × 3 cm(2) to 9 × 5 cm(2) . Eleven cases exhibited full flap survival and one case exhibited partial necrosis. The follow-up periods ranged from 2 months to 38 months. We did not observe any ranges of motion limitations in the hip and knee joints of the operated leg, or any secondary complications (e.g., abscess or prolonged drainage). Conclusions: The vastus lateralis muscle-chimeric ALT free flap is a useful option for reconstructing three-dimensional lower extremity defects. © 2015 Wiley Periodicals, Inc. Microsurgery, 2015.
    No preview · Article · Sep 2015 · Microsurgery
  • Jin Hee Lee · Sang Woo Kim · Byoung Sung Ahn · Dong Ju Moon
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    ABSTRACT: A series of Cu–ZnO–Al2O3 catalysts were prepared by coprecipitation method. The pH of solution was adjusted from 6 to 8 by using Na2CO3 solution. The prepared catalysts were evaluated for methanol synthesis from syngas (H2, CO and CO2) at lower temperature and pressures. Catalysts have been characterized by N2 physisorption, porosity measurements, XRD, TG/DTA, TPD (CO2/NH3) and XPS. Among all the catalysts pH 7 catalyst was shown higher catalytic activity towards methanol formation. It was found that the catalyst is mainly possessed the higher number of surface active sites (Cu0/Cu+), acidic and basic nature and optimum synergism between three components (Cu–ZnO–Al2O3). The activity results were evaluated with and without CO2 in syngas and it was found that higher CO conversion and higher methanol selectivity in the presence CO2.
    No preview · Article · Sep 2015 · Journal of Nanoscience and Nanotechnology
  • Jameel Lone · Jae Heon Choi · Sang Woo Kim · Jong Won Yun
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    ABSTRACT: Recent advances have been made in the understanding of pharmacological and dietary agents that contribute to browning of white adipose tissue in order to combat obesity by promoting energy expenditure. Here, we show that curcumin induces browning of 3T3-L1 and primary white adipocytes via enhanced expression of brown fat-specific genes. Curcumin-induced browning in white adipocytes was investigated by determining expression levels of brown adipocyte-specific genes/proteins by real-time reverse transcriptase polymerase chain reaction, immunoblot analysis and immunocytochemical staining. Curcumin increased mitochondrial biogenesis, as evidenced by transmission electronic microscopic detection and enhanced expression of proteins involved in fat oxidation. Cucurmin also increased protein levels of hormone-sensitive lipase and p-acyl-CoA carboxylase, suggesting its possible role in augmentation of lipolysis and suppression of lipogenesis. Increased expression of UCP1 and other brown adipocyte-specific markers was possibly mediated by curcumin-induced activation of AMP-activated protein kinase (AMPK) based on the fact that inhibition of AMPK by dorsomorphin abolished expression of PRDM16, UCP1 and peroxisome proliferator-activated receptor gamma co-activator 1-alpha while the activator 5-Aminoimidazole-4-carboxamide ribonucleotide elevated expression of these brown marker proteins. Our findings suggest that curcumin plays a dual modulatory role in inhibition of adipogenesis as well as induction of the brown fat-like phenotype and thus may have potential therapeutic implications for treatment of obesity.
    No preview · Article · Sep 2015 · The Journal of nutritional biochemistry
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    ABSTRACT: In the present study, we investigated the effects of multi-herbal water extract mixture, Taeumjowi-tang (TH) on liver proteome alteration in mice using twodimensional electrophoresis combined with MALDI-TOFMS. Animals were fed high-fat diet with or without TH (0.3% wt/wt) supplement for 12 weeks. At the end of 5(th) week of experimental diet, mice fed high-fat diet only were subdivided into 2 groups, obesity-prone (OP) and obesityresistant (OR) mice based on weight gain. OR mice gained less body weight compared to OP mice despite of same food intake. TH significantly suppressed weight gain, and proteomic analysis enabled the identification of 49 liver proteins showing differential regulation between OP and OR/TH mice. Combined results of proteomic and western blot analyses revealed decreased lipogenesis via three fatty acid metabolic targets (AMPK, ACC, and FAS) in livers of OR and TH mice. Using bioinformatic classification and network analysis, most of the identified proteins were classified as hydrolases, oxidoreductases, transferases, defense/immunity proteins, and enzyme modulators based on functional analysis of the PANTHER classification system. Combined results of proteomic and bioinformatic analyses using GeneMANIA identified two proteins (LACTB2 and NIT2) in the liver that potentially interact with fatty acid metabolic proteins. Furthermore, these proteins were included in acetylation, phosphoprotein, and metabolic processes in DAVID classification. These proteins were highly expressed in OP mice; however both their transcription and protein expression were lowered by TH treatment. In conclusion, combined data from proteomic and network analyses suggest that TH exerts anti-obesity effects by modulating fatty acid metabolic proteins/genes, particularly via the AMPK pathway. Most targeted proteins/ genes were modulated toward enhancing lipid metabolism in response to TH treatment.
    No preview · Article · Aug 2015 · Biotechnology and Bioprocess Engineering
  • Sang Woo Kim · Kwan‐Woo Lee · Sang‐A Yi · Kuk Young Cho
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    ABSTRACT: Inverse opal scaffolds presenting an embossed-pattern surface are prepared from colloidal crystal assemblies of uniformly sized golf-ball-shaped microparticles. Post-treatments, such as thermal annealing during the bridging of the microparticles for opal preparation, are avoided to prevent deterioration of surface patterns of the sacrificial template. This presents a new approach to increase the surface-area-to-volume ratio (SAV) by the alteration of morphological features in sophisticated 3D structures that remain largely unexamined owing to difficulties in their preparation. Previous results observed in 2D surfaces that show effective performance improvement through an increase in contact area, especially in biomedical applications, also appear applicable to patterned inverse opal scaffolds based on comparable results obtained from cell cultures. As the field of application of opal and inverse opal structures is expanding due to their unique structural advantages, such as 3D interconnectivity and periodic structures, our strategy opens the door for the use of patterned surfaces on highly sophisticated 3D structures, improving their performance via an increase in SAV.
    No preview · Article · Jul 2015 · Advanced Materials Interfaces
  • Hee Chul Yeom · Dong Ju Moon · Kwan Young Lee · Sang Woo Kim
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    ABSTRACT: We report the fabrication of nickel nanofiber catalysts supported on nickel metallic foam using a modified electrospinning with a grounded rotor and sequential reduction process. The robust deposition of aligned Ni nanofibers with a uniform morphology on the highly porous surfaces of the metallic foam could be achieved by controlling electrospinning parameters such as applied voltage, tip-collector-distance (TCD), concentration of polymer, and humidity. The diameters of the obtained nanofibers decreased with increasing voltage and TCDs. The uniform and thinnest Ni nanofibers on the Ni foam were obtained at a humidity of less than 30%, 15 kV applied voltage, and 17 cm TCD when using a precursor composed of nickel nitrate salt and poly(vinyl) pyrrolidone. The Ni foam catalyst support exhibited the superior thermal conducting property than other supports of MgO–MgAl2O4, Al2 O3, and SiC, enabling to a higher heat transfer during catalytic reaction. As a result, the Ni nanofiber catalyst with a high surface area and superior heat transfer performance, which is supported on the metallic foam, were successfully fabricated via a modified electrospinning for potential application of XTL process converting anything to liquids, such as for Gas-to-Liquid (GTL), Coal-to-Liquid (CTL), and Biomass-to-Liquid (BTL).
    No preview · Article · Jul 2015 · Journal of Nanoscience and Nanotechnology
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    ABSTRACT: Secreted protein acidic and rich in cysteine (SPARC) is a matricellular protein that regulates several cellular events, including inflammation and tissue remodelling. In this study, we investigated the tissue-specific expression of SPARC in streptozotocin (STZ)-induced diabetes, and found that SPARC was significantly up-regulated in the liver while down-regulated in the pancreas of STZ-induced diabetic rats. Chronic inflammation occurred in the diabetic pancreas accompanied by up-regulation of CCAAT/enhancer-binding protein beta (C/EBPβ) and its targets (TNFα, Il6, CRP, and Fn1) as well as myeloperoxidase (Mpo) and C-X-C chemokine receptor type 2 (Cxcr2). Diabetic liver showed significant up-regulation of Tgfb1 as well as moderately less up-regulated TNFα and reduced Fn1, resulting in elevated fibrogenesis. PARP-1 was not up-regulated during CD95-mediated apoptosis, resulting in restoration of high ATP levels in the diabetic liver. On the contrary, CD95-dependent apoptosis was not observed in the diabetic pancreas due to up-regulation of PARP-1 and ATP depletion, resulting in necrosis. The cytoprotective machinery was damaged by pancreatic inflammation, whereas adequate antioxidant capacity indicates low oxidative stress in the diabetic liver. High and low cellular insulin content was found in the diabetic liver and pancreas, respectively. Furthermore, we identified six novel interacting partner proteins of SPARC by co-immunoprecipitation in the diabetic liver and pancreas, and their interactions with SPARC were predicted by bioinformatics tools. Taken together, opposite expression of SPARC in the diabetic liver and pancreas may be related to inflammation and immune cell infiltration, degrees of apoptosis and fibrosis, cytoprotective machinery, and cellular insulin levels.
    Preview · Article · Jun 2015 · PLoS ONE
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    ABSTRACT: Prohibitin (PHB) is a ubiquitously expressed and highly conserved protein that participates in diverse cellular processes, and its functions are linked to a variety of diseases. In the present study, to explore transcriptional activation and signaling pathways involved in PHB regulation in response to sex hormone treatment, we investigated the effects of estrogen (17-β-estradiol, E2) on regulation of PHB in several metabolic tissues from male and female rats. Elevated expression of PHB was prominent in white adipose tissue (WAT) and the liver, and E2 stimulated PHB expression in both ND and HFD-fed rats. To further confirm the expression of PHB which was increased in WAT and the liver, we analyzed PHB expression levels in 3T3-L1 and C9 cells after the treatment of E2. Transcription and protein levels of PHB were dose-dependently increased by E2 treatment in both cell types, supporting our in vivo data. To further evaluate the possible role of E2 in elevation of PHB via estrogen receptors (ER), the potent ER inhibitor fulvestrant was treated to 3T3-L1 and C9 cells. Fulvestrant markedly suppressed both transcription and protein levels of PHB, suggesting that PHB expression in both tissues may be regulated through ERs. GeneMANIA, a predictive web interface, was used to show that Phb is regulated via the intracellular steroid hormone receptor signaling pathway, suggesting a role for ERs in expression of Phb as well as other metabolically important genes. Based on these results, we expect that targeting PHB would be a useful therapeutic approach for treatment of obesity.
    No preview · Article · Jun 2015 · Molecular and Cellular Biochemistry
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    ABSTRACT: S.‐W. Kim and co‐workers report a novel highly sensitive piezoelectric nanogenerator (PNG) for self‐powered pressure sensors based on a micro‐patterned piezoelectric polymer P(VDF‐TrFE) thin film. The micro‐structured PNGs presented on page 3203 has five times larger output power compared to the flat film‐based PNG. The micro‐structured PNG shows high sensitivity and mechanical durability under various circumstances such as rain drop and wind blow.
    No preview · Article · Jun 2015 · Advanced Functional Materials
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    ABSTRACT: The highly conserved, multifunctional YB-1 is a powerful breast cancer prognostic indicator. We report on a pervasive role for YB-1 in which it associates with thousands of nonpolyadenylated short RNAs (shyRNAs) that are further processed into small RNAs (smyRNAs). Many of these RNAs have previously been identified as functional noncoding RNAs (http://www.johnlab.org/YB1). We identified a novel, abundant, 3'-modified short RNA antisense to Dicer1 (Shad1) that colocalizes with YB-1 to P-bodies and stress granules. The expression of Shad1 was shown to correlate with that of YB-1 and whose inhibition leads to an increase in cell proliferation. Additionally, Shad1 influences the expression of additional prognostic markers of cancer progression such as DLX2 and IGFBP2. We propose that the examination of these noncoding RNAs could lead to better understanding of prostate cancer progression.
    No preview · Article · May 2015 · RNA
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    Hwan-Su Jung · Ikchan Jeon · Sang Woo Kim
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    ABSTRACT: Spontaneous spinal subdural hematoma is reported at a rare level of incidence, and is frequently associated with underlying coagulopathy or those receiving anticoagulant or antiplatelet agents; some cases accompany concomitant intracranial hemorrhage. The spontaneous development of spinal subdural hemorrhage (SDH) is a neurological emergency; therefore, early diagnosis, the discontinuation of anticoagulant, and urgent surgical decompression are required to enable neurological recovery. In this report, we present a simultaneous spinal subdural hematoma and cranial subarachnoid hemorrhage, which mimicked an aneurysmal origin in a female patient who had been taking warfarin due to aortic valve replacement surgery.
    Preview · Article · May 2015 · Journal of Korean Neurosurgical Society

  • No preview · Article · Apr 2015

Publication Stats

4k Citations
790.64 Total Impact Points

Institutions

  • 2015
    • Emory University
      • Department of Ophthalmology
      Atlanta, Georgia, United States
  • 2014-2015
    • Kongju National University
      • Division of Advanced Materials Engineering
      Gongju, Chungcheongnam-do, South Korea
    • Gyeongsang National University
      • Department of Microbiology
      Shinshū, Gyeongsangnam-do, South Korea
  • 2010-2015
    • University of Ulsan
      • College of Medicine
      Ulsan, Ulsan, South Korea
    • POSCO E&C
      Urusan, Ulsan, South Korea
    • Hoseo University
      Onyang, Chungcheongnam-do, South Korea
  • 2009-2015
    • Catholic University of Korea
      • • Department of Internal Medicine
      • • College of Medicine
      Sŏul, Seoul, South Korea
    • University of Pittsburgh
      • • Department of Computational & Systems Biology
      • • Department of Neurobiology
      Pittsburgh, Pennsylvania, United States
    • Seoul National University of Science and Technology
      Sŏul, Seoul, South Korea
    • Pusan National University
      Tsau-liang-hai, Busan, South Korea
    • Howard Hughes Medical Institute
      Ashburn, Virginia, United States
  • 2007-2015
    • Yeungnam University
      • • Department of Neurosurgery
      • • College of Medicine
      Gyeongsan, Gyeongsangbuk-do, South Korea
  • 2003-2015
    • Korea Institute of Science and Technology
      • • Clean Energy Research Center
      • • High Temperature Energy Materials Research Center
      Sŏul, Seoul, South Korea
  • 2002-2015
    • Daegu University
      • Department of Biotechnology
      Daikyū, Daegu, South Korea
    • Hanyang University
      • College of Medicine
      Sŏul, Seoul, South Korea
  • 1992-2015
    • Pohang University of Science and Technology
      • • Department of Electronic and Electrical Engineering
      • • Department of Electrical and Computer Engineering
      Geijitsu, North Gyeongsang, South Korea
  • 2013-2014
    • Brown University
      • Department of Neuroscience
      Providence, Rhode Island, United States
  • 2012-2014
    • Sungkyunkwan University
      • School of Advanced Materials Science and Engineering (AMSE)
      Sŏul, Seoul, South Korea
    • National Institute of Animal Science
      Sŏul, Seoul, South Korea
  • 2009-2014
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
    • Kangwon National University
      • Department of Applied Plant Sciences
      Shunsen, Gangwon-do, South Korea
  • 2007-2014
    • POSTECH POHANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
      경산시, Gyeongsangbuk-do, South Korea
  • 1994-2014
    • University of Seoul
      • School of Electrical and Computer Engineering
      Sŏul, Seoul, South Korea
  • 2008-2013
    • Yonsei University
      • Department of Chemical and Biomolecular Engineering
      Sŏul, Seoul, South Korea
    • Chosun University
      • Department of Advanced Materials Engineering
      Gwangju, Gwangju, South Korea
    • Chonbuk National University
      • School of Medicine
      Seoul, Seoul, South Korea
  • 2006-2012
    • Inje University
      • College of Medicine
      Kŭmhae, Gyeongsangnam-do, South Korea
  • 2011
    • Chonnam National University
      • Department of Pathology
      Gwangju, Gwangju, South Korea
  • 2007-2011
    • Kumoh National Institute of Technology
      Sŏul, Seoul, South Korea
  • 2008-2010
    • Chung-Ang University
      • College of Pharmacy
      Sŏul, Seoul, South Korea
  • 2005-2010
    • Inje University Paik Hospital
      • Department of Pediatrics
      Sŏul, Seoul, South Korea
  • 2005-2009
    • Kyungpook National University
      • Advanced Display Manufacturing Research Center
      Daikyū, Daegu, South Korea
  • 2006-2008
    • Yonsei University Hospital
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 2002-2008
    • Chungnam National University
      • Department of Chemical Engineering
      Sŏngnam, Gyeonggi Province, South Korea
  • 2005-2006
    • Chungbuk National University
      • Department of Electronic Engineering
      Chinsen, Chungcheongbuk-do, South Korea
  • 2004
    • Hankuk University of Foreign Studies
      • Department of Chemistry
      Sŏul, Seoul, South Korea
  • 1989-2003
    • Seoul National University
      Sŏul, Seoul, South Korea
  • 2001
    • Korea Advanced Institute of Science and Technology
      • Department of Chemistry
      Seoul, Seoul, South Korea
    • Hannam University
      • Department of Chemistry
      Daiden, Daejeon, South Korea
  • 1996
    • Korea University
      • Department of Materials Science and Engineering
      Seoul, Seoul, South Korea