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미세튜브 내부를 흐르는 혈액유동의 유변학적 특성에 대한 in-vitro 연구
강명진,지호성,Kang, Myung-Jin,Ji, Ho-Seong 대한의용생체공학회 2010 의공학회지 Vol.31 No.2
In order to obtain velocity profile of blood flow with high spatial resolution, a micro PIV technique consisted of a fluorescent microscope, double-pulsed YAG laser, cooled CCD camera was applied to in-vitro blood flow experiment through a micro round tube of a diameter $100{\mu}m$. Velocity distributions of blood flow for rabbit were obtained. The viscosity profiles for shear rate were found at flowing condition. To provide hemorheological characteristics of blood flow, the viscosities for shear rate were evaluated. The viscosity of blood also steeply increase by decreasing shear rate resulting in Non-Newtonian flow, especially in low shear rate region caused by RBC rheological properties. The results show typical characteristics of Non-Newtonian characteristics from the results of velocity profile and viscosity for blood flow. From the inflection points, cell free layer and two-phase flow consisted with plasma and suspensions including RBCs can be separated.
요추부 한 분절 유합술 이후 발생한 추간판 탈출증환자에 대한 보존적 치료 치험 1례
강명진,공덕현,김우영,조태영,남항우,Kang, Myung-Jin,Kong, Duck-Hyun,Kim, Wu-Young,Cho, Tae-Young,Nam, Hang-Woo 척추신경추나의학회 2010 척추신경추나의학회지 Vol.5 No.2
요추부 한 분절 유합술 이후 발생한 추간판 탈출증으로 내원한 외래 환자 1례에 한방치료를 적용하여 요통 및 하지방사통 통증 감소와 요추부 관절가동범위(ROM) 증가에 유의한 효과를 보였기에 보고하는 바이다. Objectives: The purpose of this study is the evaluation of conservative medical treatment on the herniation of intervertebral disc(HIVD) patient after the fusion surgery of a lumbar segment. Methods: We used acupuncture, herbal medication, and manipulation for this patient. And we measured of VNRS score and SLR test result to evaluate effect of conservative medical treatment. Results & Conclusions: Patient's low back and left leg pain VNRS is decreased, and the SLR test result is improved.
강명진 ( Myung Jin Kang ),남궁경영 ( Kyung Young Namgung ),김미성 ( Mi Sung Kim ),고병성 ( Byung Sung Ko ),한창순 ( Chang Soon Han ),안현택 ( Hyun Taek Ahn ),신향미 ( Hyang Mi Shin ) 대한소화기학회 2004 대한소화기학회지 Vol.43 No.5
Kaposi`s sarcoma is a rare and slowly progressive disease that primarily affects the skin but has an associated visceral involvement. It can occur in the HIV-positive patients or patients treated with immunosuppressants. However, it is extremely rare in the patients receiving the treatment for inflammatory bowel disease. We used corticosteroid for the treatment of ulcerative colitis in 60-year-old woman. Then, Kaposis`s sarcoma occured in the skin and colon of the patient. Since she was HIV-negative, we believed that it was developed from the condition of corticosteroid-induced immunosuppression. We present a case of skin and colonic Kaposi`s sarcoma in a HIV-negative woman following treatment with corticosteroid for ulcerative colitis. (Korean J Gastroenterol 2004;43:316-319)
얼굴 메쉬와 이미지의 동적 매칭을 이용한 개인 아바타의 3차원 얼굴 합성
강명진(Myung Jin Kang),김창헌(Chang-Hun Kim) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅱ
본 논문은 정면과 측면 얼굴 이미지의 특성을 살린 3차원 개인 아바타 합성에 관한 연구이다. 표준 얼굴 메쉬를 얼굴 이미지의 특징점에 맞추려는 힘을 특징점 이외의 점들까지의 거리에 대한 가우스를 분포를 따라 부드럽게 전달시켜 메쉬를 탄성있게 변형하는 힘으로 작용시켜 메쉬를 얼굴 이미지의 윤곽선을 중심으로 매칭시키고, 매칭된 메쉬가 매칭 이전의 메쉬의 기하학적 특성을 유지할 수 있도록 메쉬에 동적 피부 모델을 적용한다. 이렇게 생성한 3차원 메쉬에 이미지를 텍스춰 매핑하여 개인 특성을 살린 3차원 개인 아바타를 생성한다.
자연스러운 입술 애니메이션을 위한 입술 움직임 추적 및 메쉬 정합화 방법
강명진(Myung-Jin Kang),김웅순(Woong-Soon Kim),김창헌(Chang-Hun Kim) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1B
본 논문은 비디오 스트림에서 입술 움직임을 추적하여 그 변화의 정도를 3차원 모델에 정합시킴으로써 화자의 입술 움직임에 정확하고도 자연스럽게 대응하는 입술 애니메이션의 새로운 방법을 제안한다. 기존의 평면적인 입술 움직임의 추적 방법을 사용한 방법은 추적한 입술 움직임의 변화 정도가 입술 전체 모델에 정확히 전달되지 못하므로 자연스럽지 못한 결과를 보였다. 따라서 본 논문은 3차원 와이어 프레임 모델을 움직임 추출의 대상이 되는 이미지에 정합하는 방법을 활용한다. 이미지에서 추적한 움직임의 정도를 3차원 모델에 정합시킴으로써, 입술의 기하학적 정보를 유지하면서, 화자의 실제 입술 모양과 같이 사실적인 입술 움직임을 3차원 영상으로 합성한다.
간내 원발 낭종 파열에 의해 발생한 다발 복강 내 포충낭종 1예
강명진 ( Myung Jin Kang ),이석호 ( Suck Ho Lee ),김성준 ( Sung Joon Kim ),최용호 ( Young Ho Chei ),박정훈 ( Jeong Hoon Park ),박도현 ( Do Hyun Park ),박상흠 ( Sang Heum Park ),김선주 ( Sun Joo Kim ) 대한소화기학회 2007 대한소화기학회지 Vol.50 No.3
Hydatid disease is a parasitic infestation caused by the larval form of the cestode worms Echinococcus. In humans, the most commonly affected organs are liver and lung. Most cysts remain clinically silent and are diagnosed incidentally or when complications occur. The incidence of hydatid disease is high in the Middle East, Australia, East and South Africa and Central Europe. In Korea, hydatid disease is rare and has been reported in a few cases. We experienced a case of multiple intraperitoneal cysts from ruptured hepatic hydatid cysts in a 35-year old man. His complaint was palpable abdominal mass and discomfort. Abdominal ultrasound and CT scan revealed multiple hepatic and intraperitoneal cysts. The surgical findings showed multiple cysts and daughter cysts. The pathologic finding of resected cyst was the characteristic pattern of outer thick laminated membrane and inner thin germinal layer. Albendazole was administrated for prophylatic purpose. (Korean J Gastroenterol 2007;50:203-206)
강명진(Myung Jin Kang),지호성(Ho Seong Ji),이상준(Sang Joon Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Hemodyamic behavior of blood flow through a stenotic microchannel was investigated using a high resolution high speed camera system with varying flow rate. The width and depth of the PDMS micro-channel were 100㎛ and 50㎛, respectively. To investigate hemodynamic behavior in the micro-stenosis, hematocrit was controlled for 5% and 40%. In the contraction part of the micro-stenosis, the oncoming blood flow is accelerated rapidly. For pretreated blood sample, rolling motion of RBC was observed according to stenotic surface. The concentration change of RBCs after stenotic region seems to be closely related with ischemic circulatory disorders including ischemic heart disease.