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  1. Article

    Open Access

    The one-step fabrication of porous hASC-laden GelMa constructs using a handheld printing system

    The fabrication of highly porous cell-loaded structures in tissue engineering applications has been a challenging issue because non-porous cell-laden struts can cause severe cell necrosis in the middle region ...

    SeoYul Jo, JiUn Lee, Hyeong** Lee, Dongryeol Ryu in npj Regenerative Medicine (2023)

  2. No Access

    Article

    Effects of chitosan and collagen containing α-tocopherol on the oxidative stability in bulk oil and oil-in-water emulsion

    To provide efficient antioxidant capacities, proper carriers are needed to protect antioxidants against oxidative stress. Collagen mesh structure or chitosan gel was loaded with α-tocopherol and their effects ...

    Seo Yeong Gim, **yeong Jung, YongJun Kwon, Mi-Ja Kim in Food Science and Biotechnology (2018)

  3. No Access

    Article

    Bio-composites composed of a solid free-form fabricated polycaprolactone and alginate-releasing bone morphogenic protein and bone formation peptide for bone tissue regeneration

    Biomedical scaffolds should be designed with highly porous three-dimensional (3D) structures that have mechanical properties similar to the replaced tissue, biocompatible properties, and biodegradability. Here...

    MinSung Kim, Won-Kyo Jung, GeunHyung Kim in Bioprocess and Biosystems Engineering (2013)

  4. No Access

    Article

    Functionally graded PCL/β-TCP biocomposites in a multilayered structure for bone tissue regeneration

    Functionally graded (FG) composites consisting of polycaprolactone (PCL) and beta-tricalcium phosphate (β-TCP) particles were fabricated with a multilayered structure using a melt plotter with a two-heating-barre...

    Yong Bok Kim, GeunHyung Kim in Applied Physics A (2012)

  5. No Access

    Article

    Fabrication of three-dimensional collagen scaffold using an inverse mould-leaching process

    Natural biopolymers, such as collagen or chitosan, are considered ideal for biomedical scaffolds. However, low processability of the materials has hindered the fabrication of designed pore structures controlle...

    SeungHyun Ahn, SuYeon Lee, Youngseok Cho in Bioprocess and Biosystems Engineering (2011)

  6. No Access

    Article

    Fabrication of size-controlled three-dimensional structures consisting of electrohydrodynamically produced polycaprolactone micro/nanofibers

    In this paper, we report a facile method of fabricating size-controlled three-dimensional (3D) polycaprolactone (PCL) micro/nanofiber structure using a modified electrospinning supplemented with a specially de...

    Soongee Hong, GeunHyung Kim in Applied Physics A (2011)

  7. No Access

    Article

    Drug release from various thicknesses of layered mats consisting of electrospun polycaprolactone and polyethylene oxide micro/nanofibers

    A new drug delivery system (DDS) consisting of electrospun nanofibers is proposed. Layered mats of hydrophobic polycaprolactone (PCL) and polyethylene oxide (PEO) nanofibers were prepared successfully in a lay...

    GeunHyung Kim, Hyeon Yoon, YunKyung Park in Applied Physics A (2010)

  8. No Access

    Article

    Fabrication of poly(methyl methacrylate) micro-droplets using a complex electric field on a rolling collector

    Electrospraying was used to fabricate micro-sized droplets of various polymers using strong electric fields. For the mass production of poly (methylmethacrylate) droplets and more uniform-sized droplets than t...

    Seung Hyun Ahn, Haengnam Lee, Gil-Moon Park, GeunHyung Kim in Macromolecular Research (2010)

  9. No Access

    Article

    Highly oriented electrospun polycaprolactone micro/nanofibers prepared by a field-controllable electrode and rotating collector

    Highly aligned electrospun nanofibers were fabricated using a field-controllable electrospinning process. The technique involved a cylindrical electrode connected to a spinning nozzle to stabilize the initial ...

    Hyeong** Lee, Hyeon Yoon, GeunHyung Kim in Applied Physics A (2009)

  10. No Access

    Article

    An electrosprayed coating process for fabricating hemispherical PMMA droplets for an optical diffuser

    A modified electrospraying process is proposed for fabricating uniform microsized poly(methyl methacrylate) (PMMA) hemispherical droplets on poly(ethylene terephthalate) films for use as optical diffusers. In ...

    Seunghyun Ahn, GeunHyung Kim in Applied Physics A (2009)

  11. No Access

    Article

    Polycarprolactone ultrafine fiber membrane fabricated using a charge-reduced electrohydrodynamic process

    This paper introduces a modified electrospinning system for biomedical wound-healing applications. The conventional electrospinning process requires a grounded electrode on which highly charged electrospun ult...

    GeunHyung Kim, Hyeon Yoon, HaengNam Lee, Gil-Moon Park in Macromolecular Research (2009)

  12. No Access

    Article

    3D polycaprolactone scaffolds with controlled pore structure using a rapid prototy** system

    Designing a three-dimensional (3-D) ideal scaffold has been one of the main goals in biomaterials and tissue engineering, and various mechanical techniques have been applied to fabricate biomedical scaffolds u...

    SuA Park, GeunHyung Kim, Yong Chul Jeon in Journal of Materials Science: Materials in… (2009)

  13. No Access

    Chapter and Conference Paper

    Low Latency Cross Layer Handover Scheme in Proxy Mobile IPv6 Domain

    In IP-based wireless networks, minimizing handover latency with few packet loss is one of the most important issues. To achieve this goal, host-based and network-based fast or localized mobility management sol...

    Geunhyung Kim in Next Generation Teletraffic and Wired/Wireless Advanced Networking (2008)

  14. No Access

    Chapter and Conference Paper

    An Efficient Backup Path Selection Algorithm in MPLS Networks

    The rapid growth of real-time and multimedia traffic over IP networks makes not only QoS guarantees but also network survivability more critical. This paper proposes an efficient algorithm which supports end-t...

    Wook Jeong, Geunhyung Kim, Cheeha Kim in Quality of Service in Multiservice IP Networks (2005)

  15. No Access

    Chapter and Conference Paper

    S-RO: Simple Route Optimization Scheme with NEMO Transparency

    Network mobility (NEMO) basic support protocol maintains the connectivity when mobile router (MR) changes its point of attachment to the Internet by establishing a bidirectional tunnel between MR and Home Agen...

    Hanlim Kim, Geunhyung Kim, Cheeha Kim in Information Networking. Convergence in Bro… (2005)

  16. No Access

    Article

    Electroactive polymer composites as a tactile sensor for biomedical applications

    Modern applications could benefit from multifunctional materials having anisotropic optical, electrical, thermal, or mechanical properties, especially when coupled with locally controlled distribution of the d...

    GeunHyung Kim in Macromolecular Research (2004)

  17. No Access

    Article

    Polymeric Composites Tailored by Electric Field

    A solid composite of desirable microstructure can be produced by curing a liquid polymeric suspension in an electric field. Redistribution effect of the field-induced forces exceeds that of centrifugation, whi...

    GeunHyung Kim, Yuri M. Shkel in Journal of Materials Research (2004)

  18. No Access

    Chapter and Conference Paper

    Deterministic Edge-to-Edge Delay Bounds for a Flow in a DiffServ Network Domain

    It is important to understand delay bounds of an individual flow in the Internet in order to provide real-time applications such as Voice over IP (VoIP). In this paper, we study the deterministic bounds on edg...

    Geunhyung Kim, Cheeha Kim in Information Networking. Networking Technol… (2004)

  19. Chapter and Conference Paper

    Low-Latency Non-predictive Handover Scheme in Mobile IPv6 Environments

    In IP-based wireless/mobile networks, minimizing handover latency is one of the most important issues. Fast handover mobile IPv6 (FMIPv6) reduces the handover latency by handover prediction with link-layer inf...

    Geunhyung Kim, Cheeha Kim in Personal Wireless Communications (2004)