흉선종 제거후에 발생한 재생 불량성 빈혈 : 증례보고

전원선,이상철,김현정,배상병,김찬규,이남수,박노진,이규택,박성규,홍대식,박희숙,원종호 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

Thymoma is associated with myasthenia gravis, Pure red cell aplasia, and autoimmune diseases such as autoimmune hemolytic anemia, aplastic anemia, and hypogammaglobulinemia. It's association with aplastic anemia is rare and aplastic anemia appearing after surgical removal of thymoma is especially rare. The authors hereby report a case of aplastic anemia occuring in a patient who was diagnosed with thymoma and myasthenia gravis and had the tumor surgically removed. The patient was treated with anti-thymocyte globulin, cyclosporin, and prednisolone, and showed partial remission with hematologic improvements after 12 months.

네트워크 지연시간을 고려한 CAN 기반 피드백 제어시스템의 응답특성 분석

전종만,김대원 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

The paper analyzes the response characteristics of the system when considering the message delay time for a message transfer in a CAN-based control system. The message delay time is composed of a computation delay time and a communication delay time. The application layer of CAN communication is modeled in order to analyze two kinds of delay time mathematically and the communication delay is re-defined under the limited conditions. The CAN-based feedback control system is proposed as a target system that is the machining system with three axes. The response delay characteristics of the proposed system is analyzed through simulation and is improved by the compensation using the PID tuning method to meet the design specification of the system.

CAN 프로토콜을 이용한 네트워크 기반 제어 시스템의 구조 분석

전종만,김대원 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

This paper analyses an architecture of network-based control system and deals with its application using the CAN protocol. It is difficult to determine an optimal network architecture for a specific system. In this paper, we propose the architecture of network-based control system applicable to a specific AGV system with manipulator arms. The fixed number of periodic messages to be occurred in pre-defined in this system. These messages are scheduled by applying the DMS algorithm. To determine whether the proposed system architecture is effective or not, we perform traffic analysis for the real-time communication of all messages. Through simulation, the possible maximum transmission speed is found and the number of possible sensors to be added is investigated for improving the system performance, when the sampling period of an analog sensor is determined under fixed condition that transmission speed is over 500Kbits/sec.

정밀전단시의 유한요소 해석을 위한 파단기준 연구

강대철,전병희,이원평,성부용 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5

The Tailor Welded Blanks(TWB) are using various materials (different thickness, strength and different materials) can be welded together prior to the forming process. Therefore, TWB applications have become little by little important in automobile industries, because it has more light weight and process reduction. A burnish area is very important for TWB using laser welding. In this paper, evaluated failure criterion, effect of clearance and distance of between pad and punch by computer simulation. We used element separation method for fracture. And applied a plastic strain to failure criterion. According to the analysis results, we obtain failure criterion, when plastic strain is 2.0. The burnish area and clearance were inverse proportional.

자동차용 ABS MKⅣ-G의 성능 평가에 관한 연구

장성규,전언찬,김대원 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2

High performance ABS have been introduced in the market because car manufacturers and drives have been recongnized the important safety function of these systems. In the beginning of ABS introduction only luxury vehicles where equipped with ABS because of the high additional cost. Today there is the medium and even compact vehicle class. Therefore it became a necessity to develop an ABS which meets the requirements of manufacturers and drivers concerning performance comfort and especially cost. As a highly advanced technology and skills which include electronic, hydraulic controls, element design and manufacturing technology. ABS system has recently been entered into mass production as a result of long research and many try and errors. In this research, we tested MKⅣ-G ABS system, which was developed by ITT automotive, in various methods and got the quite good results in its function. MKⅣ-G ABS system can be extended to TCS(Traction Control System) function and is now under developing by localization in domestic. But on demand car manufactures and customers, new generation ABS system, that means simple, low cost and high function, is already under developing among advanced nations in this area. Although we are still in early stage of ABS system development, if we analyze and study the function of various ABS system through these research and put it to practical use step by step, we can develop independent ABS model in the near future.

무증상으로 발견된 담낭-담관 누공을 동반한 Mirizzi 증후군 1예

홍진희,전태주,서지영,서동대,오태훈,신원창,최원충,신은아,김기환 인제대학교 2009 仁濟醫學 Vol.30 No.-

Mirizzi's syndrome is a rare complication of the gallstone disease, characterized by narrowing of the common bile duct (CBD) due to chronic extrinsic compression of an impacted gallstone in the cystic duct or the neck of the gallbladder. The impacted gallstone may erode into the bile duct, causing cholecystocholedochal fistula. The patients generally have history of repeated attacks of jaundice and abdominal pain. But there is no report about asymptomatic Mirizzi syndrome with cholecystocholedochal fistula which were found incidentally. So herein we present our clinical experience with a case of asymptomatic Mirizzi syndrome with cholecystocholedochal fistula in a young female.

악성림프종 환자에서 복합화학요법으로 유발된 백혈구 감소증에 대한 인형 재조합 과립구 집락형성-촉진인자(rhG-CSF: Neutrogin)의 효과

박성규,전진우,기신영,유병우,김홍수,백승호,원종호,홍대식,박희숙 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.1

Clinical effects of rhG-CSF were investigated in 17 patients receiving chemotherapy for non-Hodgkin's lymphoma. Patients were given G-CSF 2㎍/㎏/day after 2nd cycle chemotherapy for least 14 consecutive days, and clinical and laboratory results were compared to results of the first cycle. Treatment with G-CSF resulted in increase of mean WBC count(952.9±152.2㎜³vs 1882.4±350.4/㎜³) and neutrophil count(212.9±53.0/㎜³vs 841.5±238.0/㎜³), reduced the duration of leukocytopenic days(12.4±1.3 days vs 5.5±1.0 days, WBC count less than 4000/㎜³) and neutropenic days(4.5±0.9 days vs 2.3±0.7 days, neutrophil count less than 500/㎜³), and reduced the duration of neutropenic fever(5.8±1.1 days vs 0.9±0.5 days). The side effects of G-CSF were not so significant. These results demonstrated that G-CSF is safe and useful for the treatment of neutropenia induced by anticancer chemotherapy of non-Hodgkin's lymphoma and reducing the incidence of febrile periods and duration of antibiotic administration.

운동량변화가 온도변화가 있는 비정상 난류유동장에 미치는 영향

유근종,전원대,김수태 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-

In analysis of unsteady turbulent flows with temperature variation, 3 different turbulence models of k-e model, modified k-e model, and Full Reynolds Stress(FRS) model, are applied. 3 Test Cases are selected for verification. These are vertical jet flows with water and sodium, and parallel jet flow with sodium. For overall verification of turbulence models, test cases are analyzed with 2-D and 3-D assumptions. Analysis yields the conclusion that 3-D computation with FRS betters others. However, modified modeling for near wall effect is required to improve its heat transfer characteristic analysis.

반달형 베플을 갖는 이중벽튜브 중기발생기의 특성 평가

위명환,김성오,전원대,어재혁,김진환 한국공업화학회 2004 응용화학 Vol.8 No.2

The DWTSG concept is proposed as a advanced steam generator of liquid metal reactor to avoid sodium-water reaction incidents in the SG. The optimization of steam generator from economic viewpoint is to minimize the total cost of heat transfer area and pumping power. The baffles are primarily used in shell and tube steam generator for inducing cross flow over tube bundles, and as a results, improving heat transfer performance. In this paper a computer based design method, which covers segmentally baffled steam generator is developed for preliminary DWTSG design. And parametric sensitivity studies are done to determine required heat transfer area to meet the specified heat capacity by calculating minimum or allowable shell-side pressure loss.

EEMR 관을 이용한 식도 과립세포종의 제거 1예

문정섭,유권,전영빈,정원종,양대열,이승진 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4

The granular cell tumor was first described in 1926. Recently, it has been suggested that the tumor is Schwann cell in origin, and this notion has been supported by electron microscopic studies and immunohistochemistry of the S-100 protein. The most frequently involved organs include the tongue, skin, breast, and digestive tract. The esophagus is rarely involved. The treatment of choice for an esophageal granular cell tumor is still controversial. The traditional treatment has been surgical excision, but new therapeutic options, including laser surgery, diathermy loop, and multiple biopsies have recently been tried. An endoscopic esophageal mucosal resection (EEMR) tube, originally designed for resection of early esophageal cancer, is widely used nowadays. A case of a granular cell tumor of the esophagus, which was successfully removed by an EEMR tube, is herein reported.