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안창헌,김상훈 강원대학교 정보통신연구소 2015 정보통신논문지 Vol.19 No.-
This paper presents the control strategy of a single-phase PWM converter under a frequency variation in the power grid, which can deteriorate the current control performance of a single-phase PWM converter connected to the power grid. Thus, this paper proposes a simple method that can correct the frequency error by using the output of a synchronous reference frame PLL(SRFPLL) controller. With the proposed method, the single-phase PWM converter can control the input AC current to be sinusoidal waveform under the distorted frequency. Its validity was verified by experimental results.
慢性肝疾患 患者 및 正常人의 卽時採血 末梢血液에서의 Vibrio vulnificus生長에 關한 比較 硏究
安昌憲,愼鏞雨,金秀男 고려대학교 의과대학 1988 고려대 의대 잡지 Vol.25 No.3
The present study was carried out to investigate the host factors which might have influences on the development of V. vulnificus septicemia. V. vulnificus was inoculated into the fresh peripheral blood of the chronic liver disease patients and healthy persons. The growth was calculated by colony count method at 60, 120 and 240 minutes, respectively. The colony counts of V. vulnificus were analyzed and compared to the laboratory data and clinical findings of the chronic liver disease patients. The results were summerized as follows; 1. The growth of V. vulnificus was markedly increased in the patients with decreased serum concentration of albumin, complement C₃ and decreased prothrombin activity. 2. Increased serum level of IgG, IgA and IgM of the patients facilitated the growth of V. vulnificus. 3. The growth of V. vulnificus was not significantly related to the serum concentration of complement C₄, iron and alkaline phosphatase level. 4. In the patient group complicated with the liver cirrhosis, poorly controlled ascites and hepatic encephalopathy, the growth of V. vulnificus was highly increased.