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RISS 인기검색어
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- 저자 : Sank Kyun Lee (검색결과 2 건)
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Lee,Sank Sook,Ro,Rac Kyun,Chung,Chai Hong,Kim,Taek Hoon,Suh,Young Wook 啓明大學校 醫科大學 1983 계명의대학술지 Vol.2 No.1
임신성영양막질환 및 임신중독증을 가진 환자의 말초혈액과 태반조직에서 다양한 형태를 가진 organism을 국내에서 처음 발견하여 보고하는 바이다. 이 다양한 형의 organism은 구충, 회충 및 촌충의 형태적 특성을 가져 아직 계통학적으로는 결정이 되지 않았으나 Lueck등에 의해 Hydatoxi lualba라고 칭해지고 있다.
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문승언,Sank Kyun Lee,이영기,김광만,양이석,양우석,김종대 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.2
In this paper, we present the calculations and the results for vibration-energy-scavenging performances based on a piezoelectric single-crystal beam. Using the measured mechanical damping ratio and electro-mechanical coupling coefficient of a novel cantilever structure device, we calculated the output performances and compared them with the measured results. A device based on a bimorph cantilever structure with a proof mass was designed to have a natural resonance frequency of about 60 Hz, and the energy-scavenging capability of piezoelectric single crystal was measured. The results showed that several tens of AC volts and a few milliwatts power were achieved under a 0.1 grms vibration condition. Also using this device and a commercial power management circuit,we performed Li-ion battery charging experiment. In this paper, we present the calculations and the results for vibration-energy-scavenging performances based on a piezoelectric single-crystal beam. Using the measured mechanical damping ratio and electro-mechanical coupling coefficient of a novel cantilever structure device, we calculated the output performances and compared them with the measured results. A device based on a bimorph cantilever structure with a proof mass was designed to have a natural resonance frequency of about 60 Hz, and the energy-scavenging capability of piezoelectric single crystal was measured. The results showed that several tens of AC volts and a few milliwatts power were achieved under a 0.1 grms vibration condition. Also using this device and a commercial power management circuit,we performed Li-ion battery charging experiment.
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