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김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1
Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.
발작성 심실상성빈맥의 12 유도 심전도를 이용한 감별진단과 ST - T 파 분석의 의의
이승욱(Seung Uk Lee),조정관(Jeong Gwan Cho),류제영(Jay young Rhew),김계훈(Kye Hoon Kim),김원(won Kim),김성희(Seong Hee Kim),김준우(Jun Woo Kim),조장현(Jang Hyun Cho),안영근(Young Keun Ahn),김원영(Won Young Kim),조상기(Sang Ki Cho),정 대한내과학회 1998 대한내과학회지 Vol.55 No.2
N/A Objects: Accurate differential diagnosis of paroxysmal supraventricular tachycardia (PSVT) has become more important after introduction of curative catheter ablation technique into clinical practice. It has been reported that ST-T changes during supraventricular tachycardia are frequent, but its association is different according to the type of PSVT and the location of the AV bypass tracts. Therefore, this study was performed to evaluate the significance of ST-T changes in addition to classic ECG parameters in differentiating AV nodal reentrant tachycardia (AVNRT) and AV reentrant tachycardia (AVRT), and predicting the location of the AV bypass tracts. Methods: One hundred thirty patients presenting with narrow-QRS complex (<120 msec) regular tachycardia in whom the mechanism of the tachycardia was later confirmed as AVNRT or AVRT by electrophysiologic study (EPS) with successful catheter ablation were included in this study. Tachycardia cycle length, visible P wave, pseudo r` wave in Vl, pseudo s wave in the inferior leads, QRS altemation, ST segments depression, and T wave inversion were evaluated in the ECGs recorded during spontaneous episodes of the PSVT and compared between patients with AVNRT (n=54) and AVRT (n=76). Results: Tachycardia cycle lengths were not different between AVNRT and AVRT (355.8 ± 50.6 msec vs. 341.9 ± 51.4 msec). P wave during the tachycardia was significantly more frequently seen in AVRT than AVNRT, (72,4% vs, 9.3%, p<0.0001). However, pseudo r` wave and pseudo s wave were significantly more frequent in AVNRT than AVBT (59.3% vs. 7.9%, 33.3% vs. 1.3%, respectively, p<0,0001). QRS alternation was significantly more frequent in AVRT than AVNRT (342% vs. 11.1%, p<0.05). ST segment depression ≥1 mm was observed in 27.8% of AVNBT and 79.9% of AVBT (p<0.001). T wave inversion was more frequent in AVRT than AVNRT (30.3% vs. 7.4%, p<0.01). ST depression ≥2mm was observed in 76.9% of the left posterior pathways, 28.1% of the left anterolateral pathways, 66.7% of the right posterior pathways, and 1.1% of the right anterior pathways. Sensitivity, specificity, and positive predictive value in differentiating AVRT from AVNRT with visible p wave were 72%, 91%, and 92%, respectively : 78%, 72%, and 80%, respectively with ST segment depression ≥1 mm, and 30%, 93%, and 85%, respectively with T wave inversion. In differentiating AVNRT from AVRT, Sensitivity, Specificity, and positive predictive value of pseudo r' wave and pseudo s wave were 59%, 92%, 84%, respectively and 33%, 99%, 94%, respectively. Sensitivity, specificity, and positive predictive value in distinguishing posterior location from anterior location of the pathways were 74%, 76%, and 72%, respectively with ST segment depression (≥2mm) and 46%, 83%, and 70%, respectively with T wave inversion. Conculsions : ST Segment depression during PSVT can be used complementally to the classic ECG parameters in the differential diagnosis of PSVT and predicting the location of the AV bypass tracts.
OpenGL에서 객체 선택과 실제 로봇의 제어 기능을 가지는 로봇 그래픽 시뮬레이터의 개발
김태원(Tae-Won Kim),김현민(Hyun-Min Kim),김성욱(Sung-Uk Kim),박지관(Ji-Gwan Park),김원호(Won-Ho Kim),신진호(Jin-Ho Shin) 한국정보기술학회 2010 Proceedings of KIIT Conference Vol.2010 No.-
본 연구에서는 로봇 경로의 초기 위치와 최종 위치가 GUI에서 마우스로 클릭되면, OpenGL의 객체 선택을 이용하여 3차원 직교 좌표점이 추출되며, 로봇의 끝점이 오프라인 그래픽 시뮬레이터뿐만 아니라, 온라인으로 실제 로봇 실험에서 주어진 경로를 추종할 수 있도록 통합 로봇 시뮬레이터가 개발된다. 삼성 FARAMAN AS2 6축 수직 다관절 로봇에 대해 정기구학, 역기구학, 자코비언 및 경로 계획이 구현된다. 통합 로봇 시뮬레이터는 Windows XP 환경에서 MFC, OpenGL 라이브러리, 서보 드라이브와 범용 DSP 모션 제어 보드를 이용하여 개발된다. 개발된 통합 로봇 그래픽 시뮬레이터는 로봇의 오프라인 그래픽 시뮬레이션과 온라인 제어 실험에 대한 결과들을 같은 컴퓨터에서 프로그램의 변경 없이 쉽게 비교하고 분석할 수 있어서 매우 효과적이다. 또한 객체 선택에 의한 로봇 제어의 구현을 통해 사용자 편의성이 증대된다. In this work, if the initial position and final position of a robot path are clicked by a mouse in the GUI, then three-dimensional Cartesian coordinate positions are extracted using an object picking in OpenGL and an integrated robot simulator is developed so that the robot end-point can track the given path in real robot experiment on-line as well as an off-line graphic simulator. For Samsung FARAMAN AS2 6-axis vertical articulated robot. the forward kinematics. inverse kinematics, Jacobian and path planning are implemented. The integrated robot simulator is developed using MFC, OpenGL Library, servo drive and general-purpose DSP motion control board in a Windows XP environment. It is very effective that the developed integrated robot graphic simulator can easily compare and analyze the results for the off-line simulation and on-line control experiment of the robot in a same computer without the change of the program. Also, user convenience is improved through the implementation of robot control by a object picking.