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정훈의(Hoon Eui Jeong),곽노균(Rhokyun Kwak),이승석(Seung Seok Lee),서갑양(Kahp Yang Suh) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A simple method is presented for fabricating micro/nanoscale combined hierarchical structures using a two-step UV-assisted capillary molding technique. This lithographic method consists of two steps: (ⅰ) fabrication of partially cured polymer microstructures using a PDMS mold and (ⅱ) subsequent nanofabrication using a high-resolution polyurethane acrylate (PUA) mold on top of the pre-formed microstructures. Using this technique, various micro/nano hierarchical structures were fabricated with minimum resolution down to 70 ㎚ over a large area with very good reproducibility.
Two-step capillary force lithography for fabricating biomimetic, superhydrophobic surfaces
Hoon Eui Jeong(정훈의),Rhokyun Kwak(곽노균),Jae Kwan Kim(김재관),Kahp Y. Suh(서갑양) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Inhibition effects in UV radiation curing by oxygen were utilized for fabricating monolithic, micro/nanoscale hierarchical polymer structures via two-step UV-assisted capillary force lithography. It was found that the UV exposure time for the partial curing of microstructure was a crucial parameter; a shorter exposure time induced collapse of the underlying microstructure while a longer time gave rise to non-fluidity of the microstructure. The partial curing is attributed to inhibition of UV cross linking by trapped or permeated oxygen within mold cavities. Using this method, various dual-scale hierarchical structures were fabricated with minimum resolution to 50 nm over a large area (5×5 ㎠) in a fast and reproducible manner.
자기공명영상 촬영 후 발생한 경추 추간판탈출증 환자의 과호흡증후군 호전 1례
정훈,김동섭,김미령,김은수,김태헌,박지용,박현민,조남훈,Jeong, Hoon,Kim, Dong-Sub,Kim, Mi-Riong,Kim, Eun-Soo,Kim, Tae-Hun,Park, Ji-Yong,Park, Hyun-Min,Cho, Nam-Hoon 척추신경추나의학회 2012 척추신경추나의학회지 Vol.7 No.1
Objectives : The purpose of this study is to investigate the clinical application of acupuncture treatment to a cervical herniated intervertebral disc patient with hyperventilation syndrome developed after magnetic resonance imaging(MRI). Methods : A patient with cervical herniated intervertebral disc got hyperventilation syndrome after taking magnetic resonance imaging. To relieve symptoms, we took paperbag breathing first aid, but it had no effect. So we used acupuncture therapy with strong stimulation. To measure the outcome of the patient's improvement, we observed change of vital sign and verbal numerical rating scale(VNRS). Results : After 8 minutes of acupuncture treatment, the patient had significant improvement in change of vital sign and verbal numerical rating scale(VNRS). Conclusions : In emergency situation, acupuncture treatment as a first aid has a positive effect to control hyperventilation syndrome.
환측 동기침법을 이용한 경추 추간판 탈출증 환자의 급성 압박성 요골신경마비 치험 1례
정훈,조남훈,박지용,박현민,배상은,홍남중,Jeong, Hoon,Cho, Nam-Hoon,Park, Ji-Yong,Park, Hyun-Min,Bae, Sang-Eun,Hong, Nam-Jung 대한한의정보학회 2011 大韓韓醫情報學會誌 Vol.17 No.2
Objectives : The purpose of this study is to evaluate the affected part acupuncture moving treatment for acute radial nerve palsy patient who has Cervical Herniation. Methods : We examined 1 patient with Radial nerve palsy who admitted Jaseng Hospital of Oriental Medicine. The patient was treated by the affected part acupuncture moving treatment including herbal mixture. Results : In this study, in the end of affected part acupuncture moving treatment, patient's condition has improved. Muscle strength was also increased. Conclusions : The affected part acupuncture moving treatment for acute radial nerve palsy was effective in restore of functional activities, but this treatment needs more study.
정훈의(Hoon Eui Jeong),이성훈(Sung Hoon Lee),김필남(Pilnam Kim),서갑양(Kahp Y. Suh) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
A new, innovative approach for fabricating high aspect-ratio polymer nanohairs is presented, which is based on an elongation of polymer nanostructures by interfacial energy modulation. Calculation of two interfacial energies at the mold/polymer and the polymer/substrate interface indicates that the two energies should be compatible for successful elongation of the polymer nanostructures. By this approach, high aspectratio polymer (PMMA and PS) nanostructures were fabricated with maximum ratio up to ~ 25 on a solid substrate with good uniformity and reproducibility. A double-sided flexible tape fabricated by this approach shows good adhesive property and super-hydrophobicity, demonstrating the unique fabrication ability and applicability of this method.