http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Pil-Sung Yang,정보영,Jaehan Jeong,So-Jeong You,Hee Tae Yu,김태훈,Jung-Hoon Sung,Sang-Soo Lee,Hyung-Deuk Park 대한심장학회 2019 Korean Circulation Journal Vol.49 No.8
Background and Objectives: There are limited published data on the incidence and cost associated with cardiac implantable electrical device (CIED) infection for Asian patients. We analyzed the infection burden associated with the implantation of CIEDs in Korea. Methods: In the Health Insurance Review & Assessment Service (HIRA) database during the period from January 1, 2014 to December 31, 2016, we identified 16,908 patients with CIED implantation. CIED infection was defined as either: 1) Infection-related diagnosis code by the Korean Standard Classification of Diseases after any CIED procedure; or 2) CIED removal along with systemic infection. Results: The proportions of first implantation and replacement were 77.6% and 22.4%, respectively. During the follow-up period of 17.1±10.6 months, a total of 462 patients had CIED infection with incidence of 1.95 per 100 person-years with higher infection rate in replacement than first implantation (3.97 vs. 1.4 per 100 person-years, p<0.001). The average cost per person was US$ 16,584 (pacemaker, $13,736; implantable cardioverter defibrillator, $28,402; cardiac resynchronization therapy, $29,674). The risk factors of CIED infection were generator replacement (adjusted hazard ratio [aHR], 3.14; 95% confidence interval [CI], 2.60–3.78), diabetes mellitus (aHR, 1.94; 95% CI, 1.58–2.38), and congestive heart failure (aHR, 1.86; 95% CI, 1.51–2.28). Conclusions: The rate of CIED infection in Korea was 1.95 per 100 person-years with average cost of US$ 16,584. The most important risk factor was generator replacement. This result suggests that generator replacement should be performed cautiously to avoid CIED infection.
바람과 진동을 고려한 항공기 탑재 AESA 레이다 성능 평가용 운동 모델링 및 시뮬레이션
이동욱(Donguk Lee),임재한(Jaehan Im),이해민(Haemin Lee),정영광(Youngkwang Jung),정재현(Jaehyeon Jeong),신종환(Jong-Hwan Shin),이성원(Sungwon Lee),박준현(June Hyune Park),안재명(Jaemyung Ahn) 한국항공우주학회 2020 韓國航空宇宙學會誌 Vol.48 No.11
본 논문은 AESA 레이다를 탑재한 항공기가 비행 중 발생하는 바람과 진동에 의해 받는 영향을 평가하기 위한 시뮬레이터를 소개한다. AESA 레이다는 항공기의 노즈콘(nose cone)에 탑재하며, 비행 시 공기의 저항력에 의한 진동이 발생한다. 이 진동은 AESA 레이다의 거동에 영향을 주며, 수신한 신호의 위상 오차를 야기할 수 있다. 시뮬레이터는 레이다의 위치와 자세를 정확하게 모의하기 위해 강체 동역학, 평균 바람/난류, 그리고 모드/환경 진동에 대한 수학적 모델과 노즈콘에 대한 기하모델을 고려한다. 일련의 테스트 시나리오에 기반한 연구가 개발된 시뮬레이터의 효율성을 입증하기 위해 수행되었다. This paper introduces a simulator to assess the impacts of the wind and the airframe vibration on the performance of the Active Electronically Scanned Array (AESA) radar mounted in an aircraft. The AESA radar is mounted on the nose cone of an aircraft, and vibration occurs due to the drag force. This vibration affects the behavior of the AESA radar and can cause phase errors in signal. The simulator adopts the geometric model for nose cone, the mathematical models on the rigid-body dynamics of the aircraft, the average/turbulent winds, and the mode/ambient vibrations to compute the position and the attitude of the radar accurately. Numerical studies reflecting a set of test scenarios were conducted to demonstrate the effectiveness of the developed simulator.
한국형발사체 종합조립동 고압가스 운용을 위한 발사체 접속장치 및 고압유연배관 소개
지상연(Sangyeon Ji),박정근(Junggeun Park),정재한(Jaehan Jeong),이상원(Sangwon Lee),남중원(Jungwon Nam) 한국추진공학회 2015 한국추진공학회 학술대회논문집 Vol.2015 No.11
종합조립동 기계지원시스템과 발사체 접속장치는 한국형발사체의 지상 운용을 위해 필요한 지상점검 장비이다. 특히, 기계지원시스템 중 발사체 접속장치와 고압유연배관은 발사체의 공압시험을 위해 필수적이다. 본 논문에서는 발사체 접속장치와 고압유연배관에 대하여 소개하였다. The mechanical support equipments and launch vehicle connection unit are necessary to a ground support equipments for the KSLV-Ⅱ ground operation. In particular, launch vehicle connection unit and high-pressure flexible hose of mechanical support equipments are necessary for the flow test of KSLV-Ⅱ. In this paper, launch vehicle connection unit and high-pressure flexible hose are introduced.