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박제욱 ( Je-wook Park ),엄재선 ( Jae-sun Uhm ),김동준 ( Dong-jun Kim ),박동혁 ( Dong Hyuk Park ),김규 ( Kyu Kim ),조현수 ( Hyun Soo Cho ),장혁재 ( Hyuk-jae Chang ) 대한내과학회 2016 대한내과학회지 Vol.90 No.6
폐고혈압은 흔하지 않으나 치명적인 질환으로 적합한 원인을 찾아 교정하는 것이 중요하다. 이에 저자들은 동기능부전 및 동정지로 인한 좌심실 질환으로 폐고혈압의 발생을 심도자술로 증명하였고, 동기능부전 및 동정지를 치료함으로써 폐고혈압의 호전을 보인 1예가 있어 보고하는 바이다. A 60-year-old man visited the hospital after experiencing dyspnea after exertion for 2 weeks. An electrocardiogram showed sinus arrest with junctional escape rhythm at 40 beats/min. Transthoracic echocardiography showed that the right ventricular systolic pressure (RVSP) was approximately 71 mmHg and that the left ventricular ejection fraction was preserved. The ratio of peak early diastolic transmitral inflow velocity to early diastolic peak mitral annular velocity (E/E’) was 29. Cardiac catheterization revealed a systolic pulmonary artery pressure (SPAP) of 63 mmHg, a mean pulmonary artery pressure of 27 mmHg, and a pulmonary capillary wedge pressure of 22 mmHg with a rhythm of 40 beats/min. The patient was diagnosed with pulmonary hypertension (group 2) due to sick sinus syndrome. SPAP decreased to 48 mmHg during atrial pacing at 60 beats/min. After permanent pacemaker insertion, RVSP decreased from 71 mmHg to 44 mmHg. In this case, passive group 2 pulmonary hypertension occurred due to sick sinus syndrome. (Korean J Med 2016;90:528-532)
염료감응형 태양전지의 광전극 확장에 따른 광전특성 연구
서현웅(Seo, Hyun-Woong),김미정(Kim, Mi-Jeong),박제욱(Park, Je-Wook),김호성(Kim, Ho-Sung),김희제(Kim, Hee-Je) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
The field of dye-sensitized solar cell (DSC) is being researched actively at present. Because DSC has several advantages to pass the limits of Si solar cells such as a low manufacturing expense, a simple manufacturing process and its transparency. A lot of researches are underway about materials and processes in the field of dye-sensitized solar cell but its structure has been fixed up as the sandwich structure that both edges are used as positive and negative terminals. But the structure as of present is a factor of decreasing efficiency because the more electrons are recombined the further distance from terminal, considering about the characteristic of dye-sensitized solar cell that electrons generated inside cell are moved by diffusion. In this study, we made experiment on expanding the terminal to shorten internal moving distance of electron and compared the results according to the variation of active area to find out the effect of this trial. As a result, we achieved about 15.5% improvement of maximum power and 0.5% improvement of efficiency from terminal-expanded dye-sensitized solar cell of 2cm^{2} active area and concluded that the increasing rate of efficiency is raised as the active area becomes wider.