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랫드에서 hyaluronic acid에 의한 유착 방지 효과에 관한 연구
이종훈,이주명,윤영민,강태영,우호춘,강윤호,김남중,김희석,이경갑,정종태,Lee, Jong hoon,Lee, Joo Myoung,Yun, Young min,Kang, Tae young,Woo, Ho choon,Kang, Yoon ho,Kim, Nam joong,Kim, Hee seok,Lee, Kyoung kap,Cheong, Jongtae 대한수의학회 2004 大韓獸醫學會誌 Vol.44 No.4
This study was conducted to investigate the effect of hyaluronic acid (HA) on prevention of abdominal adhesions depending on various concentrations thereof by inducing an abrasion experimentally in the cecum of rats. Each group was consisted of 10 rats, and 40 rats were divided into 4 groups comprising the saline treatment group, HA 0.4% treated group, 0.6% treated group, and 0.8% treated group. And abrasion was caused in the cecum by using dry gauze and thereby, adhesion was induced. On 7 days after the operation, adhesions of each region were evaluated into the range of 0-4. Significant difference was found in the adhesion score between the control group and each experimental group (P<0.05). Also, HA 0.4% treatment group showed the lowest adhesion score (P<0.05). In the light of the above results, HA 0.4% solution was more effective on prevention of adhesion than HA 0.6% and 0.8% solution.
($NiAl+Ni_3Al$) 2상 합금의 미세 조직과 기계적 특성에 관한 연구
이종훈,최병학,이남진,김학민,이진형,Lee, Jong-Hun,Choe, Byeong-Hak,Lee, Nam-Jin,Kim, Hak-Min,Lee, Jin-Hyeong 한국기계연구원 1994 硏究論文集 Vol.24 No.-
The Ni-Al intermetallic compound that has the greatest potential to be commercialized shows the high ductility at room temperature with the addition of boron, but has extremely low ductility at high temperature and oxidation environment. On this research work, the changes of microstructure and compressive fracture properties were studied in ($NiAl+Ni_3Al$) two-phase alloys. The precipitation behavior of $Ni_3Al$ after solution treatment at $1300^\circC$ for 14hrs and aging treatment at $800^{\circ}C$ for 14hrs was varied with Al content in ($NiAl+Ni_3Al$) two-phase alloys. These microstructure could be modified dramatically by suitable heat treatments. Martensite or martensite plus $Ni_3Al$ microstructure was obtained upon oil quenching from $1300^\circC$. Aging of Martensite at $800^\circC$ resulted in the $Ni_3Al$ plus NiAl phase. The compressive fracture strength and compressive fracture strain were improved by the $Ni_3Al$ plus NiAl phase mixtures at room temperature and $1100^\circC$. Microcracks are observed mostly in the region of NiAl and the interface of $NiAl-Ni_3Al$ phase after compressive test at room temperature. In the case of high temperature compressive test, microcracks are formed in the region of $Ni_3Al$ phase.
Ilizarov 시술 후 추적검사에 있어 초음파검사의 유용성 : 단순촬영과의 비교
이종훈,지성우,이호원,이성문,김정식,김홍,송광순,조길호,우성구,Lee, Jong Hoon,Jee, Sung Woo,Lee, Ho Won,Lee, Sung Moon,Kim, Jung Sik,Kim, Hong,Song, Kwang Soon,Cho, Kil Ho,Woo, Sung Ku 대한영상의학회 1998 대한영상의학회지 Vol.38 No.6
Purpose : To compare the usefulness of ultrasonography in follow up evaluation after the Ilizarov procedurewith that of plain radiography. Materials and Methods : We analyzed ultrasound findings in twelve patients who hadundergone the Ilizarov procedure, and retrospectively compared the results with the findings of plain radiography.The procedure was performed due to post-traumatic limb deformity or non-union(nine of twelve patients), congenitalpseudoarthrosis(one case), sequelae of poliomyelitis(one case), and short stature(one case). The patients' meanage was 29 years ; eleven of twelve were male. Ten of twelve procedures were performed on the tibia and two on thefemur. After 7-10 days, distraction was initiated at a rate of 0.25mm four times a day. Ultrasonography wasperformed with a 5-10 MHz linear or convex transducer ; new bone formation was defined as dotted or linearechogenic foci within a hypoechoic distraction gap. Initial ultrasonographic examination was performed 2-4 weeksafter distraction, and the results were compared with those of plain radiography. Color Doppler imaging wasperformed in three cases. Results : On ultrasonograms, new bone formation was initially detected 18-29(mean, 23)days after distraction, and on plain radiographs, 37-58(mean, 45) days after this procedure ; ultrasonography thusdetected new bone formation at least three weeks earlier than did plain radiography. Complication after theIlizarov procedure were four cysts at the distraction site, and one pin site infection, as seen on ultrasonograms.None of these four cysts, the size of which was 12-22mm(mean, 17mm), was visible on plain radiographs. In one casein which a cyst was present, ultrasound-guided aspiration was performed. Color Doppler examination was performedin three of twelve patients, and in all three, periosteal vascularity at the edge of the distracted gap was seento be preserved. Conclusion : After the Ilizarov bone lengthening procedure, ultrasound appears to be useful forfollow-up examination. New bone formation, as well as complications, can be detected earlier ; it can indicatewhether ultrasound-guided interventional procedure is required, and if combined with color Doppler study, is ableto detect the periosteal blood supply. Further evaluation of the clinical significance of preserved periostealblood supply seems however, to be needed.
중소형 무인기 브레이크 시스템용 복합형 지능재료펌프 설계
이종훈,황재혁,양지연,주용휘,배재성,권준용,Lee, Jonghoon,Hwang, Jaihyuk,Yang, Jiyoun,Joo, Yonghwi,Bae, Jaesung,Kwon, Junyong 항공우주시스템공학회 2015 항공우주시스템공학회지 Vol.9 No.3
In this study, the design of compound smart materials hydraulic pump that can be applied to a small-medium size UAV having a limited space envelope and weight has been conducted. Compound Smart Material Pump(CSMP) proposed in this paper is composed of a pressurize pump and a flow pump for supplying the high pressure and fluid displacement to overcome the disadvantages of the piezoelectric actuator which has a small strain. Though this compound smart material pump has been designed as small size and lightweight as possible, it can sequentially supply the sufficient large flow rate and pressure required for the brake operation. For the design of CSMP, about 2,700 kg (6,000 lb) class fixed wing manned aircraft was selected. Based on the established requirements, the design of the CSMP have been done by strength, vibration, and fluid flow analysis.
이종훈,Lee, Jong-Hun 한국데이터베이스진흥원 2006 디지털콘텐츠 Vol.5 No.-
200년 여름. 우리들은 월드컵을 통해서 하나가 되었고 그 안에서 감동을 느꼈다. 특히 우리나라의 4강신화는 세계 속에 대한민국이란 브랜드를 확실하게 각인시키며 엄청난 홍보 효과를 가져다 줬다. 4년이 지난 지금 우리는 세계적인 축제이자 모든 축구선수들의 희망인 또 한번의 월드컵을 애타게 기다리고 있다. 4년전의 기쁨과 감격을 다시 누릴 수 있게 되길 기원하면서 말이다. 그래서 일까, 유저들의 니즈를 파악한 게임업체들은 월드컵 특수를 노리며 앞다퉈 축구게임을 출시하고 있다. 축구란 대중성을 가진 스포츠를 게임으로 구현, 분위기까지 잘 맞물리게 한다면 기대 이상의 성과를 얻을 수 있기 때문이다.
이종훈,Lee, Jong-Hun 한국데이터베이스진흥원 2006 디지털콘텐츠 Vol.1 No.-
MMORPG가 캐주얼게임의 바람을 잠재울 수 있을까.온라인게임의 대명사라고 할 수 있는 MMORPG가 주요 업체들의 신작출시로 다시 한번 대박 행진에 도전하고 있다. 넥슨ㆍ한빛소프트ㆍ웹젠 등이 야심차게 준비한 대작들이 속속 베일을 벗기 시작한 것. 이들 업체의 새로운 게임들이 전작을 뛰어넘는 성공으로 보답할지 관심이 모아지고 있다.
Mg<sub>0.1</sub>Zn<sub>0.9</sub>O/ZnO 활성층 구조의 박막트랜지스터 연구
이종훈,김홍승,장낙원,윤영,Lee, Jong Hoon,Kim, Hong Seung,Jang, Nak Won,Yun, Young 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.7
We report the characteristics of thin-film transistor (TFT) to make the bi-channel structure with stacked $Mg_{0.1}Zn_{0.9}O$ (Mg= 10 at.%) and ZnO. The ZnO and $Mg_{0.1}ZnO_{0.9}O$ thin films were deposited by radio frequency (RF) co-sputter system onto the thermally oxidized silicon substrate. A total thickness of active layer was 50 nm. Firstly, the ZnO thin films were deposited to control the thickness from 5 nm to 30 nm. Sequentially, the $Mg_{0.1}ZnO_{0.9}O$ thin films were deposited to change from 45 nm to 20 nm. The bi-layer TFT shows more improved properties than the single layer TFT. The field effect mobility and subthreshold slope for $Mg_{0.1}ZnO_{0.9}O$/ZnO-TFT are $7.40cm^2V^{-1}s^{-1}$ and 0.24 V/decade at the ZnO thickness of 10 nm, respectively.
흰 쥐의 감염된 전층피부 결손에서 Iodine의 드레싱 방법에 따른 창상치유 효과의 비교
이종훈,김요한,민경희,홍성희,이원미,채정돈,전진현,Lee, Jong-Hoon,Kim, Yo-Han,Min, Kyung-Hee,Hong, Sung-Hee,Lee, Won-Mi,Chae, Jeong-Don,Jun, Jin-Hyun 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.3
Purpose: Iodine has been used for the prevention or management of wound infection as a topical agent. Although iodine was widely used mainly by Betadine$^{(R)}$ and cadexomer iodine, there was no comparative study on the efficacies of dressing methods of iodine. And also it's wound healing effect was not yet clear. The purpose of this study is to compare antibacterial effects and wound healing effects associated with various dressing methods of iodine on infected full thickness skin defect in the mouse. Methods: One full thickness skin defects in the mice (n=60) were developed on the back and left open for twenty-four hours. Sixty mice were divided into four groups : group S (dressing with Betadine$^{(R)}$ soaking, n=15), group T (dressing with Betadine$^{(R)}$ topping, n=15), group I (dressing with Iodosorb$^{(R)}$, n=15), group G (control group, dressing with dry gauze, n=15). The size of the wound defects and the grades of wound healing were evaluated in 4, 7, 10 days, and antibacterial effect was evaluated with restricted zone in Mueller Hinton agar by disk diffusion method. Results: After the wound was left open for twenty-four hours, many Staphylococcus aureus were cultured. The wound defect size was decreased in order of Betadine$^{(R)}$ soaking, Iodosorb$^{(R)}$, Betadine$^{(R)}$ topping and gauze dressing group in all days, but difference among experimental groups was not statistically significant. The grade score of wound healing was increased in order of Betadine$^{(R)}$ soaking, Iodosorb$^{(R)}$, Betadine$^{(R)}$ topping and gauze dressing group, and the difference was statistically significant. Antibacterial effect for S. aureus was increased in order of Iodosorb$^{(R)}$, Betadine$^{(R)}$ soaking, Betadine$^{(R)}$ topping and gauze dressing group, and the difference was statistically significant. Conclusion: Selection of the effective dressing method of iodine for infected wounds remains a controversial decision. According to this study, Iodosorb$^{(R)}$ may be most effective method for antibacterial effect and Betadine$^{(R)}$ soaking may be most effective method for infected wound healing. However, further study is necessary to evaluate the clinical efficacy of dressing methods of iodine and to search for the mechanisms that explain their effects.