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김상우,김성수,윤홍준,류한준,Kim, Sang-Woo,Kim, Seongsu,Yoon, Hong Joon,Ryu, Hanjun 한국진공학회 2014 진공 이야기 Vol.1 No.4
Since recent electronics technologies have been developed and they tend to spend huge amount of electrical power, self-powered electronics have been paid attention worldwide. To realize self-powered electronics, energy harvesting technology, which generally converts ambient energy into electrical energy, has to be introduced. Among numerous energy sources, mechanical, thermal, and electrostatic event would be of broad interest in field of energy harvesting. Here, this article introduces the promising alternative energy concepts of nanogenerator including piezoelectric, triboelectric, and hybrid types. With these nanogenerators, we are able to apply onto not only self-powered system, but expect these open green energy market.
박재석 ( Jaeseok Park ),정재권 ( Jaekwon Jung ),김현수 ( Hyunsoo Kim ),박창근 ( Changkeun Park ),김대진 ( Daejin Kim ),이재광 ( Jaekwang Lee ),류한준 ( Hanjun Ryu ) 대한내과학회 2021 대한내과학회지 Vol.96 No.2
COVID-19는 주로 발열 및 호흡기 증상을 보이는 신종 감염 질환이다. 그러나 저자들은 전형적인 급성 대장염과 유사한 복통 및 설사를 나타내는 COVID-19에 감염된 증례를 경험하였다. 그러므로 COVID-19의 세계적 유행이 발생하고 지역사회 감염이 확대되는 현재 상황에서 병인이 명확하지 않는 설사와 임상 경과와 일치하지 않는 발열이 발생한다면 COVID-19에 의한 장염일 가능성을 배제해야 함을 강조하는 바이다. On 11 February, 2020, the World Health Organization announced that COVID-19 was a novel coronavirus disease first detected in Wuhan, Hubei Province, China. COVID-19 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The complete clinical picture is not fully known. Illness ranges from mild to fatal. The common symptoms include fever, cough, and dyspnea usually developing 2-14 days after exposure. However, diarrhea was present in a few patients with COVID-19. We report a case of COVID-19 mimicking acute colitis. (Korean J Med 2021;96:143-146)