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개인용 컴퓨터를 이용한 내시경소견의 기록과 관리시스템의 개발
최규용,정인식,정규원,김부성,최명규,최병길,선희식,차상복 대한소화기내시경학회 1993 Clinical Endoscopy Vol.13 No.2
The authors developed a computerized documentation system to record and store all the data pertaining to an endoscopic examination of the upper digestive tract. The system was programmed using the database management system Clipper Version 5.01. It is easy and convenient to use due to advanced deaign of input screen using menu bars and pull down menu and windows. The system was designed to permit the easy storage and retrieval of data by personnel who lack computer skills and who may only have limited typing ability. Today this system has been in daily use for 1 year at the endoscopic units of 8 different branch hospitals of Catholic university,medical college. Overall the experience in these centers has been positive, with excelient or good participation. Characteristics of this system are a menu-driven system, data input by predefined list, instantaneous report generation, on line access to previous examination, late entry of yathologic regerts. and record retrieval, listing according to different criteria. For the description of endoscopic findings and diagnosis, structured input is maintained. All of the findings are chosen from predefined list using pop-up screen and also free text typing is allowed. Therefore time effort was not increased compared to conventional documentation. Structured input and the resulting categorical data affer several advantages.
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Recent Advances in Polymer Reaction Engineering: Modeling and Control of Polymer Properties
최규용,김양수,Won Jung Yoon,In Sun Kim 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.1
Complex reaction kinetics and mechanisms, physical changes and transport effects, non-ideal mixing, and strong process nonlinearity characterize polymerization processes. Polymer reaction engineering is a discipline that deals with various problems concerning the fundamental nature of chemical and physical phenomena in polymerization processes. Mathematical modeling is a powerful tool for the development of process understanding and advanced reactor technology in the polymer industry. This review discusses recent developments in modeling techniques for the calculation of polymer properties including molecular weight distribution, copolymer composition distribution, sequence length distribution and long chain branching. The application of process models to the design of model-based reactor optimizations and controls is also discussed with some examples.
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최규용,박중남,이재광,정한철,최광식,이철위 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
재생가능한 여러 종류의 불균일 촉매를 사용하여 batch형, fixed형 장치에서 과산화수소와 페놀을 반응시켜 수용액 하에서 카테콜과 하이드로퀴논을 합성하였다. Batch 형에서 사용한 촉매 중에서 Fe,Co-NaY를 사용하여 반응하였을 경우가 페놀의 전환율(21.8%), 하이드로퀴논 (23.4%), 카테콜(58.2%), By-product(17.0%)의 결과로 가장 우수하였으며, 최적화 조건은 페놀과 과산화수소의 몰비(3), 온도(60℃), 페놀과 촉매의 무게비(50), 용매와 촉매의 무게비(4.5)였다. Fixed 형에서도 Fe,Co-NaY촉매를 사용하였는데 결과로는 온도(70℃), 페놀과 과산화수소의 몰비(3), 용매와 촉매의 무게비(4.5), WHSV=4h-1였고, 페놀의 전환율(21.8%), 하이드로퀴논(16.5%), 카테콜(44.9%), By-product(26.1%)의 결과를 보였다.
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내시경적 방법으로 교체된 Buried Bumper Syndrome 1예
최규용,김진일,정인식,김성수,김윤태,황인식,김혜원,선희식,이창돈,안창혁,한석원,채현석,장정원,방춘상 대한소화기내시경학회 2001 Clinical Endoscopy Vol.22 No.3
Percutaneous endoscopic gastrostomy (PEG) is used for nutritional support to the patients who cannot maintain the adequate oral intake. Compared with operative gastrostomy, PEG is a safe, rapid, and less expensive technique. Among several complications, buried bumper syndrome is a late complication in which internal bumper erodes into the gastric wall or migrates into the abdominal wall due to improper compression to the gastric wall. We here report a patient with peritubular leakage, resistance of tube feeding, and abdominal pain which were developed 13 months after percutaneous endoscopic gastrostomy. On endoscopic examination, the gastrostomy lumen could not be found. The gastrostomy tube was replaced successfully to new one with single procedure endoscopic technique. No complication was occurred and the function of tube has been well preserved.
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