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유영삼 대한이비인후과학회 2011 대한이비인후과학회지 두경부외과학 Vol.54 No.2
Background and Objectives In recent years, medical recording by digital photography has become a useful tool in every field. Developments in digital techonology have enabled digital X-ray techniques as well as three-dimensional imaging tools such as CT and MRI. Digital data are processed to form three-dimensional images of the patient body and to provide virtual endoscopy. This study aims to widen the application of 3D images for medical recording. Subjects and Method CT data from five patients with neck mass were used to make gross 3D images showing the lesion site with the aid of 3D-doctor 4.0 and RAPIDIA 3D ver. 2.8 (INFINITT healthcare , Seoul, Korea). Surface rendered images and volume rendered images were compared with the medical photos regarding identification, visibility of lesion, measuring, multidirectional view and reproducibility. Results 3D images could show real surface contour of the patients, including lesion sites. Shapes shown by the 3D images are exactly the same as the medical photographs, thus it was possible to measure the length and angles and view the image in any directions by rotating. Conclusion Surface rendered and volume rendered images can be used as pre-operative recording tools.
제조 후 1년 경과된 Strand/Sliverr Particleboard의 F/U 몰비별 Formaldehyde 방출량에 관한 연구
朴 憲,劉永三 건국대학교 자연과학연구소 1999 建國自然科學硏究誌 Vol.10 No.2
This study was conducted in order to measure formaldehyde emission with the passing of one year from particleboard(two kinds of raw material's shape - sliver and strand) bonded with Urea resin which was made of different F/U molar ratio. The Urea resin was manufactured six kinds of Formaldehyde/Urea molar ratio 1.0, 1.2, 1.4, 1.6, 1.8 and 2.0. Formaldehyde emission values were compared at 1, 3, 7, 15, 30, 90, 150, 250, and 365 days after board manufactured. The results were as follows : 1. I year after board manufactured, both Sliver and Strand Particleboard satisfied the emission limit (E₂: 5㎎/ℓ - F3140 classification) of KS standard with 1.0, 1.2, 1.4 and 1.6. 2. The Partidcleboards with F/U molar ratio 1.4 and 1.6 satisfied E2 limit only in 150 days and 365 days respectively. 3. Formaldehyde emission amount of Sliver Particleboard was similar to Strand Particleboard depended on each F/U molar ratio. However, the formaldehyde emission pattern was influenced with the shape of raw materials(particle shape).
유영삼,박수종,김민진,이성호,변용익,천무영,한원용,YU YOUNG SAM,PAK SOOJONG,KIM MINJIN,LEE SUNGHO,BYUN YONG-IK,CHUN MOO-YOUNG,HAN WONYONG 한국천문학회 2001 天文學論叢 Vol.16 No.1
We developed a CCD camera that can observe wide fields on the sky. We tested the field of views using various lenses. For cooling the CCD chip, we used a thermoelectric cooling device and tested the cooling efficiency. This camera will continuously observe a part of the sky. The data from the camera will be used to decide the current weather condition by the real-time star counting program (SCount) which will be developed later.
유영삼,장혁기 인제대학교 1999 仁濟醫學 Vol.20 No.1
안면신경마비 환자의 마비 정도를 평가하는 방법은 여러 가지가 있고, 저자는 이를 컴퓨터를 이용한 분석 방법을 활용하여 환자의 마비 정도를 평가하는 방법으로 응용하여 보았고 이 중 4예에서 활용가능성을 검증해 보았다. Evaluation of facial motion is very difficult and there are few objective tools to quantify or qualify facial motion. House-Brackmann grading system and ENoG are the tools mentioned above. To establish a simple, objective evaluation system of facial motion, we used computerized image-difference analysis system. Facial motions of 4 patients with facial palsy were analyzed utilizing computerized image-difference analysis system, Image capturing, subtraction and thresholding techniques were used to anlayze resting, smiling and eye-closing motions of face. The thresholded image after subtraction of resting face from eye closing face showed greater movement in eye area than in mouth area. This result suggests that it is possible to use image analysis system to access facial motion of subjects wish facial palsy.