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Hwa-Rang Cha,Kyung-Ho Park,Yeong-Jun Choi,Rae-Young Kim 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper proposes a wireless power transfer (WPT) system to achieve high power density and constant voltage output. The proposed system consists of a doublesided LCC compensation network and a semi-bridgeless rectifier. The output voltage is controlled by using the pulse width modulation control of the semi-bridgeless rectifier switch without changing the operating frequency. Therefore, the proposed system provides a stable output voltage even under various disturbances such as input voltage and load variation. In addition, there is an advantage that the power density is improved because no additional passive elements and stages for voltage control are required. In order to confirm the validity of the proposed system, simulation results are provided.
Park, Hyun Woong,Kang, Min Gyu,Kim, Kyehwan,Koh, Jin-Sin,Park, Jeong Rang,Jeong, Young-Hoon,Ahn, Jong Hwa,Jang, Jeong Yoon,Kwak, Choong Hwan,Park, Yongwhi,Jeong, Myung Ho,Kim, Young Jo,Cho, Myeong Cha The Korean Society of Cardiology 2018 Korean Circulation Journal Vol.48 No.2
<P><B>Background and Objectives</B></P><P>After the first acute myocardial infarction (AMI), a considerable proportion of patients are newly diagnosed with diabetes mellitus (DM). However, in AMI, controversy remains regarding the disparity in prognosis between previously diagnosed DM (known-DM) and newly diagnosed DM (new-DM).</P><P><B>Methods</B></P><P>The study included 10,455 patients with AMI (non-DM, 6,236; new-DM, 659; known-DM, 3,560) admitted to one of 15 participating centers in Korea between November 2011 and January 2016 (average follow-up, 523 days). We compared the characteristics and clinical course of patients with known-DM and those with new- or non-DM.</P><P><B>Results</B></P><P>Compared to patients with known-DM, those with new-DM or non-DM were younger, more likely to be male, and less likely to have hypertension, dyslipidemia, prior stroke, angina, or myocardial infarction. Compared to patients with new-DM or non-DM (reference), those with known-DM had higher risks of major adverse cardiac events (hazard ratio [HR], 1.20; 95% confidence interval [CI], 1.06–1.35; p=0.004), cardiac death (HR, 1.26; 95% CI, 1.01–1.57; p=0.042), and congestive heart failure (HR, 1.58; 95% CI, 1.20–2.08). Unlike known-DM, new-DM did not increase the risk of cardiac events (including death).</P><P><B>Conclusions</B></P><P>Known-DM was associated with a significantly higher risk of cardiovascular events after AMI, while new-DM had a similar risk of cardiac events as that noted for non-DM. There were different cardiovascular outcomes according to diabetes status in patients with AMI.</P>