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이영인,최승석,임재승(Jae Seung Lim) 대한교통학회 1998 대한교통학회 학술대회지 Vol.34 No.-
실시간 교통정보 처리과정은 현장설비로부터 수집되는 각종 교통상황자료를 분석/처리하여 소통상황, 주행속도, 통행시간 등의 교통상황을 단기예측하는 과정으로서 이는 주행안내시스템의 핵심요소기술이다. 주행안내 시스템 개발의 필요성은 선진국을 중심으로 제기되어 왔으며, 주행안내시스템은 각국 정부의 강력한 지원정책을 바탕으로 연구개발 단계를 거쳐 시범운영의 단계에 있다. 국내에서도 교통정체의 해소와 안전주행의 여건마련을 위하여 교통정보를 수집 · 처리 · 제공하는 기술의 개발이 활발하게 진행되고 있다. 그러나 국내 기술수준을 보면 전자통신기술을 바탕으로 교통정보의 수집과 제공에 관한 연구는 어느 정도 진행되고 있으나 운전자가 필요로 하는 교통정보의 분석과 처리에 관한 연구는 매우 저조한 실정이다. 본 연구의 목적은 다앙한 시스템에서 수집되는 자료를 종합적으로 처리, 저장, 관리하고 이의 분석결과를 제공하는 교통정보센터의 프로토타입(Prototype)을 설정하는 것이다. 이러한 목표를 수행하기 위해서 요구되는 교통정보실험실의 기능은 수집된 교통자료의 신뢰성 분석, 교통정보의 종합적인 처리 · 저장 · 관리, 그리고 교통정보의 제공은 구분할 수 있다. 따라서, 현재 교통정보실험실에서 운영중인 정보의 형태를 제시하며, 이들 정보의 신뢰성을 실측자료와 비교한 실험적 결과를 예시한다. 또한, 개별 정보이용자에게 실시간 교통정보를 제공하기 위한 통신기술의 검토가 이루어진다. 차내 이용자에게 정보를 실시간으로 제공하기 위해서는 궁극적으로 무선통신기술의 응용이 필요하며 정보이용자에게 다앙한 정보를 제공하기 위해서 인터넷 통신과 연계시키는 것이 합리적으로 판단된다. 결론 부분에서는 교통정보실험실의 기능을 강화시키기 위한 향후의 연구과제를 제시한다.
하지에서의 역행성 지방근막 피판술: 유리피판술을 대치할 수 있는가?
이영진,안희창,최승석,황원중,Lee, Young Jin,Ahn, Hee Chang,Choi, Methew Seung Suk,Hwang, Weon Joong 대한성형외과학회 2005 Archives of Plastic Surgery Vol.32 No.1
A soft tissue defect of the lower leg or foot presents a challenging problem. Reconstructive surgeon should be armed at all points of wound site, tendon and bone exposure, injury of major vessel and so on in the lower limb. We reconstructed the defects of lower legs and feet of 25 patients between February, 1997 and December, 2003. Applying reversed adipofascial flap with skin graft on a soft tissue defect of the lower leg or foot is challenging. We did a comparative study of 25 reversed adipofascial flaps with 51 free flaps. All 25 cases of reverse adpofascial flap reconstruction were successful except for a partial loss of skin graft in 3 occasions. The reversed adipofascial flap had a merit of a short operation time and hositalization, a high success rate and minimum complications. Besides major vessels in the lower leg are better preserved and donor morbidity is minimal. However, the flap is unmerited in reconstructing a hug hallowed defect and in the leg with poor blood circulation and once previous surgery. The operators may consider the feasible substitution of reversed adipofascial flap for free flap before applying in the lower leg.
횡복직근 유리 피판술로 재건된 가슴에서의 감각 회복에 대한 임상적 고찰
안희창,성건용,최승석,황원중,Ahn, Hee-Chang,Sung, Kun-Yong,Choi, Matthew Seung-Suk,Hwang, Won-Joong 대한미세수술학회 2005 Archives of reconstructive microsurgery Vol.14 No.2
The purpose of this study is to introduce a sensory restoration in reconstructed breast with free TRAM flap to evaluate recovery aspect and recovery quantity. 144 patients underwent breast reconstruction with free TRAM flap by authors and were followed up at the out patient clinique. We discovered that sensory of operated breast was recoverd. We divide the breast into 5 region (upper medial, lower medial, upper lateral, lower lateral, nipple areolar complex) for examining the sensory restoration. Sense of upper medial region & upper lateral region is recovered more quickly than other region. Touch sensation was recovered more quickly than pain sensation, temperature sensation, vibratory sensation. After about 1 year all protective sensation was recovered in all patient. We discovered that severe postop scar and irradiation of breast is related to delayed sensory recovery, age and size of flap is not related to sensory recovery.
반응성 이색성 염료를 사용하여 제조한 폴리(비닐 알코올) 편광필름의 내구성 및 편광특성에 관한 연구
최이준(E Joon Choi),최승석(Seung Sock Choi),박일현(Il Hyun Park),장진호(Jin Ho Chang),백상현(Sang Hyun Back),박상봉(Sang Bong Park) 한국고분자학회 2013 폴리머 Vol.37 No.1
이색성 염료인 콩고레드, 다이렉트블랙 22 및 다이렉트블랙 4를 염화시아눌산과 반응시켜 3,5-이염화-2,4,6-트 리아진 잔기를 갖는 반응성 이색성 염료를 합성하였다. 합성한 반응성 이색성 염료를 폴리(비닐 알코올)(PVA) 필름 에 염착시키고 400% 일축 연신시켜 편광필름을 제조한 후 투과도 및 편광효율을 측정하였다. 비교를 위하여 요오 드를 PVA 필름에 염착시키고 400% 연신시켜 편광필름을 제조하여 투과도 및 편광효율을 측정하였다. 내구성 실험 을 50 oC의 온도에서 85% 상대 습도의 조건으로 120시간 동안 진행하였다. 결론적으로, 요오드 염착 PVA 편광필름 과 비교하여 반응성 이색성 염료 염착 PVA 편광필름의 경우 내구성이 크게 증진되었음을 알 수 있었다. Three reactive dichroic dyes with 3,5-dichloro-2,4,6-triazine moiety were synthesized by reaction between dichroic dyes (such as congo red, direct black 22 or direct black 4) and cyanuric chloride. Poly(vinyl alcohol) (PVA) films were dyed with the obtained three reactive dichroic dyes. After 400% drawing of the PVA films, their optical properties were compared with an iodine-doped PVA film prepared in the same condition. Durability test was performed at 50 oC in 85% of relative humidity for 120 hrs. We found that compared with the iodine-doped PVA polarizing film, the relative durability of the PVA polarizing film dyed with the reactive dichroic dyes was greatly improved.
안희창,성건용,조동인,최승석,Ahn, Hee Chang,Sung, Kun Yong,Jo, Dong In,Choi, Seung Suk 대한미세수술학회 2004 Archives of reconstructive microsurgery Vol.13 No.1
Transverse rectus abdominis muscle (TRAM) free flap is widely used for breast reconstruction, however donor-site morbidities such as abdominal wall weakness, hernia, bulging are troublesome. For the purpose of minimizing donor-site morbidity, there has been a surge in interests in muscle sparing free TRAM flap preserving the anatomy of rectus abdominis muscle, fascia, and motor nerve. The purpose of this study is to investigate complication and morbidity after muscle sparing free TRAM flap. Between August, 1995 and May, 2003, there were 108 cases of muscle sparing free TRAM flap of breast reconstruction. There was no abdominal hernia. There were 4 cases of dog ear, 3 cases of marginal necrosis of apron flap, 2 cases of asymmetry of umbilicus. At 1 year after operation, most patients feel comfortness in physical exercise. Muscle sparing free TRAM flap provides ample amount of well vascularized soft tissue with small inclusion of rectus abdominis muscle and fascia. Also it minimizes donor-site morbidity with rapid recovery of abdominal strength.
동과자가 Glucose Oxidase로 손상된 혈관내피세포에 미치는 영향
서은아 ( Eun A Seo ),최승석 ( Natthew Seung Suk Choi ),이병찬 ( Byung Chan Lee ),이재규 ( Jai Kyoo Lee ),이강창 ( Kang Chang Lee ),정종길 ( Jong Gil Jeong ),신민교 ( Min Kyu Shin ),송호준 ( Ho Joon Song ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.2
N/A Objectives : It has been demonstrated that oxidative stress of oxygen radicals is involved in vascular disorder. The aim of this study was to evaluate the cytotoxicity of glucose oxidase (GO) and protective effect of herb extract on GO-induced cytotoxicity in the cultured vascular endotherial cell (VEC) of mouse. Methods : Cytotoxic effect of GO and protective effect of Benincasae Semen (BS) were performed by MTT assay, after cultured VEC were incubated in the media containing 1-30 mU/ml GO for 6 hours. Results : GO decreased cell viability in dose-and time-dependent mannner, and BS increased cell viability decreased by GO-induced cytotoxicity in these cultures. Conclusion : From above the results, GO has cytotoxic effect, and herb extract, BS is very effective in blocking GO-induced cytotoxicity in cultured VEC.
안희창,김종도,이장현,최승석,Ahn, Hee-Chang,Kim, Jong-Do,Lee, Jang-Hyeon,Choi, Seung-Suk 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.6
Purpose: There are many articles describing about Guyon canal compression syndrome. Until recently, most of these articles have been presented about the symptoms of ulnar nerve compression, but there have been no reports about ulnar artery compression. In this article, besides the nerve compression symptoms in the Guyon's canal, we represented the symptoms and treatments based on the ulnar artery obstruction. Methods: Guyon canal is composed of the hamate and pisiform, and the ligaments which connect them. The course of the ulnar nerve and artery, which passes through this narrow canal, is affected by the anatomical structure of the base of the canal. Out of 14 patients (21 cases) were retrospectively reviewed in this study from 2006 to 2009. Of 14 patients, there were 5 men and 9 women with ages between 21 to 61 years old. The symptoms had volar sensory loss of ulnar sided digits, with muscular atrophy of hypothenar muscles. Prior to surgery, most of these patients had vascular disorders which was diagnosed definitively by angiography and electromyogram. Results: The release of Guyon canal and interposition graft of the obstructed arteries was carried out to 11 patients (15 cases) who had artery (vascular) occlusive disorder, and. 12 cases had sympathectomy and interposition graft after resection of obstructed ulnar artery. Six cases had release of carpal tunnel performed simultaneously. There were no major complications after surgery. The circulation of the ulnar artery was improved along with the patients' symptoms. Conclusion: The pre-existing articles about Guyon canal compression syndrome were mainly focused on ulnar nerve compression. This study, which was carried out by our department, showed that most of these patients had ulnar artery obstruction or stenosis simultaneously with ulnar nerve compression. The vascular disorder was corrected by interposition graft after the resection of the site of ulnar artery occlusion. And to conclude, When we resolve the ulnar nerve compression, the proper diagnosis & treatment of impaired ulnar artery circulation should be carried out concomitantly.