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만성 장무지 신전건의 파열에 대한 파열단 사이의 반흔조직을 이용한 재건술: 증례 보고
이승훈,이근배,Lee, Seung-Hun,Lee, Keun-Bae 대한족부족관절학회 2014 대한족부족관절학회지 Vol.18 No.4
Chronic extensor hallucis longus tendon ruptures are very rare, and may lead to hallux dysfunction. To the best of our knowledge, reconstruction of a chronic extensor hallucis longus rupture using interposed scar tissue has not been previously reported. Our results show that direct repair method using interposed scar tissue for chronic extensor hallucis longus rupture can successfully restore function of the hallux and provide good satisfaction in carefully selected patients.
이승훈,정광화,김중곤,곽정훈,한덕우,Lee, Seung-Hun,Jeong, Kwang-Hwa,Kim, Jung-Gon,Khan, Modabber ahmerd,Kwag, Jung-Hun,Han, Deug-Woo 한국축산환경학회 2014 한국축산시설환경학회지 Vol.20 No.4
Liquid fertilization of pig manure slurry is very useful treatment method to recycle organic waste matter as a valuable fertilizer. The solids precipitate and accumulated at the bottom of liquid fertilization tank. The content of nitrogen and phosphate are higher in sediment than pig manure slurry. The pH of sediment was 7.53. S-COD/T-COD ratio of pig manure slurry and sediment were 0.477, 0.29, respectively. The moisture content of sediment of pig manure slurry and sediment were 80.45~83.82%, 97%, respectively. The content of organic matter of sediment was 8.79~10.56%. The content of nitrogen and phosphate of sediment and pig manure slurry were 9,000~11,100 mg/L, 9,100~11,100 mg/L, respectively. The particle size of pig manure slurry was distributed from 2 mm to 0.125 mm. On the other hand. the particle size of sediment was under 0.125 mm.
에폭시/구상실리카 콤포지트의 전기적 절연파괴 및 인장 강도 특성 연구
이승훈,Lee, Seung-Hun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.10
In order to develop a high voltage insulation material, spherical silicas with two average particle sizes of 5 ${\mu}m$ and 20 ${\mu}m$ were mixed in different mixing ratios (1:0, 0.7:0.3, 0.5:0.5, 0.3:0.7, 0:1) and their total filling content was fixed at 65 wt%. In order to observe the dispersion of the spherical silicas and the interfacial morphology between silica and epoxy matrix, field emission scanning electron microscope (FE-SEM) was used. The electrical insulation breakdown strength was estimated in sphere-plate electrodes with different insulation thicknesses of 1, 2, and 3 mm. Electrical insulation breakdown strength decreased with increasing mixing ratio of 5/20 ${\mu}m$ and the thickness dependence of the breakdown strength was also observed. The tensile strength of the neat epoxy was 82.8 MPa as average value and its increased with decreasing particles size and that of epoxy/silica (2 ${\mu}m$) was 107 MPa, which was 130.8% higher value.