Jae Eun Jung

Inje University, Kŭmhae, Gyeongsangnam-do, South Korea

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Publications (36)105.98 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Purpose To assess the clinical and radiologic outcomes of meniscus allograft transplantation (MAT) with serial evaluation at 1 year and at 4 years. Methods Among 151 patients who received MAT between March 2006 and June 2009, we prospectively recruited the patients who had undergone clinical and radiologic examinations at 1 year after the operation. The Lysholm score, International Knee Documentation Committee score, and Knee Society Score were determined. Plain radiography was used for evaluation of osteoarthritis, and magnetic resonance imaging (MRI) was used to assess the cartilage status and meniscal extrusion. Results Thirty-nine patients with a mean age of 40 ± 9 years were recruited. The first visit was conducted at a mean of 13.6 months (range, 11 to 17 months) postoperatively, and the last visit was conducted at a mean of 50.4 months (range, 48 to 72 months) postoperatively. Of the patients, 29 were men. The lateral side was involved in 27 patients. The Lysholm knee score increased to a median value of 89 (range, 75 to 100) at the first visit and 88 (range, 76 to 100) at the second visit from a preoperative median value of 79 (range, 37 to 99), which was statistically significant according to the Kruskal-Wallis test. According to the Kellgren-Lawrence grade based on anteroposterior radiographs, 21 patients (54%) showed no arthrosis progression and the overall status of arthrosis on anteroposterior radiographs was significantly changed (P < .001). On MRI, 25 patients (64%) showed no cartilage status change and the overall status was not changed significantly (P = .178). The meniscal extrusion extent was 4.2 ± 0.4 mm at the first visit and 4.2 ± 0.6 mm at the second visit (P = .678), and the relative percentage of extrusion was 0.44 ± 0.16 and 0.51 ± 0.21, respectively (P = .059). The subgroup in which arthrosis had progressed on MRI showed a larger amount of change in the relative percentage of extrusion (P = .023). No correlation was observed between meniscal extrusion and various outcomes. Conclusions Repeat assessment at 4 years showed that MAT showed improvement in knee function, but it had decreased over time. Considerable meniscal extrusion was observed, but it did not increase during follow-up and did not show any correlation with other outcomes. Extrusion progression showed significant correlation with arthrosis progression. Level of Evidence Level IV, therapeutic case series.
    Arthroscopy The Journal of Arthroscopic and Related Surgery 09/2014; 30(11). DOI:10.1016/j.arthro.2014.05.032 · 3.21 Impact Factor
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    ABSTRACT: We demonstrate a holographic image reconstructed by a FPD-based complex spatial light modulator (SLM) which is composed of a phase-only SLM and a sheet of beam combiner. A complex SLM which modulates both amplitude and phase independently is necessary for a better image quality with reducing conjugate images. The two-phase encoding method is one of the most practical candidates for the complex SLM. The proposed complex SLM is presented in a phase-only LCD panel which can be manufactured in a conventional LCD process and it was used for generating different phases. The PAL (Parallel-Aligned nematic Liquid crystal) mode is used to modulate the phase without the amplitude change. The film-type beam combiner consists of a prism array and a grating made by a conventional fabrication process. The beam combiner plays a vital role to merge two pixels and to adjust effective complex modulation. In this paper, the holographic image by the proposed complex SLM is verified by the experimental and simulation work in a monochromatic reconstruction. This complex SLM can be scaled up and it is a promising candidate SLM for a large-size holographic 3D display.
    Proceedings of SPIE - The International Society for Optical Engineering 02/2014; DOI:10.1117/12.2037621 · 0.20 Impact Factor
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    ABSTRACT: Submicrometer air gap structure has formed on diffuse reflection structure to improve light reflectance. Covering polymer or liquid on a diffuse reflector to make optical components induces the severe decrease of the total reflectance, since the diffuse reflected angle of some light rays is larger than the critical angle and the rays travel to the medium until meeting a proper small incident angle. The reflectance drops to 68% of the original value with just a polymer coating on the diffuse reflector. The formation of an air tunnel structure between the polymer layer and the diffuse reflector makes a symmetrical reflective index matching state and recovers 95% of the original reflectance. Due to the simple fabrication process and the chemical stability, the structure can be applied to various optical components and reflective display devices.
    Optics Letters 02/2013; 38(3):290-2. DOI:10.1364/OL.38.000290 · 3.29 Impact Factor
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    ABSTRACT: The addition of dichroic dye to liquid crystal (LC) display makes an optical shutter easily without polarizer. However, the dichroic dye induces one significant problem an inadequate contrast. The general reason for this is the less available UV light for polymerization due to absorption of UV light by trapped dye molecules in polymer matrix. This problem results into accumulation of residual pre-polymer molecules and induces slow polymerization that produces larger droplet size for LCs. This in turns produces insignificant electro-optical properties for dye-PDLC display. Our strategy proposed a new way to overcome this difficulty by adjusting the some factors, e.g., pre-polymer, initiator contents and curing time.
    Journal of Computational and Theoretical Nanoscience 11/2012; 18(1):225-229. DOI:10.1166/asl.2012.4643 · 1.34 Impact Factor
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    ABSTRACT: In this paper, multidirectional light-control reflective (LCR) films are developed in order to create an active reflective structure that will enhance the image brightness and contrast ratio of reflective dye-doped polymer-dispersed liquid crystal (D-PDLC) displays at lower viewing angles. Advantages of LCR films are that their production is low cost and they require a simple photolithographic fabrication method. The optimum design prism-type light-control reflective film succeeded in minimising the surface scattering effect; thus, the contrast ratio is much enhanced. The symmetric and asymmetric LCR films produced multidirectional scattering that enhances the reflectance at lower viewing angles, which has importance in future display applications. In particular, the prism LCR film has been found to be more influential on the reflectance of D-PDLC films due to multidirectional scattering of light by non-symmetric arrays. The improvement in contrast ratio has been confirmed by the enhancement of optical properties for reflective D-PDLC displays at lower viewing angles below 30°.
    Liquid Crystals 11/2012; 39(11):1-6. DOI:10.1080/02678292.2012.715688 · 2.49 Impact Factor
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    ABSTRACT: The enhancement of electro-optical properties in reflective-type dye polymer dispersed liquid crystal (PDLC) has been achieved by applying an additional white PDLC layer along with dye PDLC layer. This newly modified structure that consists of white PDLC layer and scattering reflector acts as an active reflector. In this practice, an additional arrangement of a polymer barrier layer is made-up over white PDLC layer, to block the absorption of any solution from dye PDLC. The contrast ratio of this new configuration is almost doubled with low driving voltage and high ON reflectance. Simultaneously, the “off” state has been observed darker than single layer dye PDLC structure. This new configuration can be potentially significant for various display applications such as E-paper, outdoor billboard, and flexible display. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
    Journal of Applied Polymer Science 04/2012; 124(1). DOI:10.1002/app.35011 · 1.77 Impact Factor
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    ABSTRACT: Sudan black B (SBB) was used to investigate as the nonionic diazo dye-doped in polymer dispersed liquid crystal (PDLC) display, by polymerization-induced phase separation (PIPS) method. The maximum absorbance, contrast ratio, dichroic ratio and the order parameter of nonionic diazo dye in nemetic host (TL203) were investigated using UV–Vis polarized spectroscopy. The orientation of the dye molecules was controlled by electric field, which enabled the contrast ratio of the dye to be obtained by electrically switching. The change occurring on droplet morphologies and electro-optical properties of PDLC film with the change in contents of Sudan black dye and liquid crystals (LC) contents was investigated. We found an increase in LC droplet sizes with the increase of diazo dye and LC contents. Moreover the addition of small amount of nonionic diazo dye reduced the threshold voltage (V $_{\boldsymbol{\rm th}})$ , increased off-state transmittance, enhanced the contrast ratio and decreased the response time of dye-doped PDLC. Additionally the change in transition temperature of LC and changes in LC droplet morphologies with the addition of dye were also observed. Such changes were observed with the images taken by polarized optical microscope (POM). The detail discussions on such behaviours were also made.
    Bulletin of Materials Science 04/2012; 35(2). DOI:10.1007/s12034-012-0286-6 · 1.02 Impact Factor
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    ABSTRACT: Multiple color states have been realized in single unit cell using double electrochromic (EC) reaction. The precise control of bistability in EC compounds which can maintain several colors on the two separated electrodes allows this new type of pixel to be realized. The specific electrical driving gives a way to maintain both sides in the reduced EC states and this colors overlapping in the vertical view direction can achieve the black state. The four color states (G, B, W, BK) in one cell/pixel can make a valuable progress to achieve a high quality color devices such like electronic paper, outdoor billboard, smart window and flexible display using external light source.
    Optics Letters 01/2012; 37(2):235-7. DOI:10.1364/OL.37.000235 · 3.29 Impact Factor
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    ABSTRACT: Dye-doped PDLC has a high probability to be used as reflective optical shutter due to its good reflectance compared to normal PDLC or LC shutter structures. The black state can be significantly enhanced by the minimized surface scattering between polymer and LC surface, which makes a harmful result to the contrast ratio, one of most important factors for optical shutter. To remove this scattering effect, we have developed new combinational structure, consisted of guest dye-doped LC (DLC) and dye-doped PDLC (DPDLC). In the newly fabricated dye-doped PDLC structure, the front location of dye-doped LC layer can remove the light scattering effect of the surface of single dye PDLC structure. The proposed process can also remove the randomly distributed dyes in polymer area of dye PDLC. This technique enhances the reflectance as well as the contrast ratio.
    Optical Materials 11/2011; 34(1):256-260. DOI:10.1016/j.optmat.2011.08.027 · 1.98 Impact Factor
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    ABSTRACT: This article deals with the study of polymer-dispersed liquid crystal (PDLC) films that consisted of microdroplets of liquid crystals (LCs) dispersed in a polymer matrix. The PDLC films were fabricated by the photoinduced phase separation method under room-temperature conditions. To determine the extent of the effects of the molecular structures and their physical properties of different mixtures of monomers and LCs on the morphology and electrooptical properties of the PDLC films, various mixtures were used. A detailed discussion of the obtained results is given. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
    Journal of Applied Polymer Science 08/2011; 121(3):1424 - 1430. DOI:10.1002/app.33641 · 1.77 Impact Factor
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    ABSTRACT: A color-reflective optical shutter structure has been studied using polymer-stabilized liquid crystal (PSLC) devices with a specular reflector. The combined effect of an LC, a polymer, a color dye, and a specular reflector results in a high performance of a reflective-mode optical shutter as well as of a simple structure with a fast response time capable of smooth moving images. The reflectance is up to 40%, one of highest for reflective devices, whose response times are fast enough to provide video speed response (
    Japanese Journal of Applied Physics 08/2011; 50(8). DOI:10.1143/JJAP.50.080210 · 1.13 Impact Factor
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    ABSTRACT: The color optical switching device by polymer network liquid crystal (PNLC) with color filter on a specular reflector shows excellent performance; white reflectance of 22%, color gamut of 32%, and contrast ratio up to 50:1 in reflective mode measurement. The view-angle dependence of the reflectance can be adjusted by changing the PNLC thickness. The color chromaticity shown by the device is close to the limit value of color filters, and its value nearly remains with respect to the operating voltage. These optical properties of the device can be explained from the prediction based on multiple interactions between the light and the droplets of liquid crystal. The high reflectance, vivid color image, and moderate responds time allow the PNLC device to drive good color moving image. It can widely extend the applications of the reflective device.
    Optics Express 07/2011; 19(14):13097-104. DOI:10.1364/OE.19.013097 · 3.49 Impact Factor
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    ABSTRACT: Molecular dynamics (MD) computer simulation techniques, as a powerful tool commonly utilized by the liquid crystal display (LCD) community, usually are employed for computing the equilibrium and transport properties of a classical many body system, since they are very similar to real experiments in many respects. In this paper we present molecular dynamics computer simulation results taken for a mixture of the two different kinds of nematic liquid crystals (LCs). We calculated rotational viscosity from Brownian behavior with friction of the mean director of the mixture comprising pentylcyanobiphenol (5CB) and decylcyanobiphenol (10CB) by using molecular dynamics computer simulation, where intermolecular potential parameter is Generalized AMBER force field (GAFF). Our computed results show a good agreement with the experimental results.
    Chinese Journal of Chemistry 01/2011; 29(1). DOI:10.1002/cjoc.201190059 · 1.58 Impact Factor
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    ABSTRACT: We report a cholesteric liquid crystal (ChLC) display with multicolor in a single-layered configuration using a multi-pitch stabilization by reactive mesogen (RM). The cholesteric pitches were modulated by temperature and stabilized at room temperature by polymerization of the RMs through ultraviolet (UV) exposure. In a single-layered ChLC display without any additional layer such as a color filter, multicolor was obtained by a multi-pitch stabilization through spartially selective UV expose at several temperatures.
    Japanese Journal of Applied Physics 08/2010; 49(8). DOI:10.1143/JJAP.49.084103 · 1.13 Impact Factor
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    ABSTRACT: Various type color PDLC structures have been characterized on a glass and a plastic substrate for reflective mode color display. The standard PDLC and the black diachronic dye mixed PDLC structure with color filter (RGB) show a good black state with high color purity and 256 gray levels, even though both structures have a dark color images. Color dichroic dye (RGB/CMY) mixed PDLC cells promise a good white reflectance. The problem of using color dye system is the enhancement of a poor black state. Using new CMY color based filter with black dye PDLC shutter structure can improve a white state with a proper color vision.
    05/2010; 41(1). DOI:10.1889/1.3500532
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    ABSTRACT: We propose a multi-color cholesteric liquid crystal (CLC) film in a single-layered configuration with reactive mesogen (RM). The cholesteric pitches are controlled by temperature and memorized by photo-polymerization of the KM. Using the multi-pitch stabilization in a single layer, multicolor CLC display was obtained without any additional components.
    05/2010; 41(1). DOI:10.1889/1.3500324
  • Advanced Materials 11/2009; 21(41):4139 - 4142. DOI:10.1002/adma.200900697 · 17.49 Impact Factor
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    ABSTRACT: Nanogripper structures using aligned multiwall carbon nanotubes (MWCNTs) are demonstrated and their electromechanical properties have been studied in this paper. The balance of electrostatic force, together with elastostatic force and van der Waals force determines the driving conditions. A triode structure drastically reduces the bias between two moving parts, which consist of MWCNTs. Low bias also enables low power consumption as well as the reduction of electrical damage to an object. The moving parts can keep the same state without any applied biases after bending and connection. This also enables power saving during driving. The device can be a base structure for various nanorobotic or other nanoelectromechanical devices.
    IEEE Transactions on Nanotechnology 08/2008; 7(4-7):389 - 393. DOI:10.1109/TNANO.2008.926331 · 1.83 Impact Factor
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    ABSTRACT: This paper reports a novel method for reconstructing the posterolateral structures [lateral collateral ligament (LCL), popliteus tendon, popliteofibular ligament] based on an anatomical study of a cadaveric dissection. The popliteus tendon was found to always be attached to the anterior–inferior portion of the femoral attachment site of the LCL, and the average distance from the origin of the popliteal tendon in the femoral side to that of the LCL was 18.5mm (17–20). The insertion site of the LCL in the fibular side was located anterior–inferior-superficially and the popliteofibular ligament was inserted into the posterior–superior-deep portion around the styloid process. Two femoral tunnels and one fibular head tunnel were made at the proximal and distal portion of the anatomical insertion sites.
    Archives of Orthopaedic and Trauma Surgery 03/2008; 129(3):381-385. DOI:10.1007/s00402-008-0722-7 · 1.60 Impact Factor
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    ABSTRACT: The demand for increased information storage densities has pushed silicon technology to its limits and led to a focus on research on novel materials and device structures, such as magnetoresistive random access memory and carbon nanotube field-effect transistors, for ultra-large-scale integrated memory. Electromechanical devices are suitable for memory applications because of their excellent 'ON-OFF' ratios and fast switching characteristics, but they involve larger cells and more complex fabrication processes than silicon-based arrangements. Nanoelectromechanical devices based on carbon nanotubes have been reported previously, but it is still not possible to control the number and spatial location of nanotubes over large areas with the precision needed for the production of integrated circuits. Here we report a novel nanoelectromechanical switched capacitor structure based on vertically aligned multiwalled carbon nanotubes in which the mechanical movement of a nanotube relative to a carbon nanotube based capacitor defines 'ON' and 'OFF' states. The carbon nanotubes are grown with controlled dimensions at pre-defined locations on a silicon substrate in a process that could be made compatible with existing silicon technology, and the vertical orientation allows for a significant decrease in cell area over conventional devices. We have written data to the structure and it should be possible to read data with standard dynamic random access memory sensing circuitry. Simulations suggest that the use of high-k dielectrics in the capacitors will increase the capacitance to the levels needed for dynamic random access memory applications.
    Nature Nanotechnology 01/2008; 3(1):26-30. DOI:10.1038/nnano.2007.417 · 34.05 Impact Factor

Publication Stats

549 Citations
105.98 Total Impact Points


  • 2014
    • Inje University
      Kŭmhae, Gyeongsangnam-do, South Korea
  • 2000–2014
    • Samsung Advanced Institute of Technology
      Usan-ri, Gyeonggi-do, South Korea
  • 2012
    • Daegu Gyeongbuk Institute of Science and Technology
      • Department of Information and Communication Engineering
      Daikyū, Daegu, South Korea
  • 2008
    • Inje University Paik Hospital
      • Department of Orthopedic Surgery
      Sŏul, Seoul, South Korea
  • 2003–2005
    • Sungkyunkwan University
      Sŏul, Seoul, South Korea