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만성 B형 간염 바이러스 감염자에서 혈청 HBV DNA 양과 간조직 소견의 관련성
허정호 ( Heo Jeong Ho ),허정 ( Heo Jeong ),권대식 ( Kwon Dae Sig ),문재현 ( Mun Jae Hyeon ),김광하 ( Kim Gwang Ha ),강대환 ( Kang Dae Hwan ),송근암 ( Song Geun Am ),조몽 ( Jo Mong ),양웅석 ( Yang Ung Seog ) 대한소화기학회 2003 대한소화기학회지 Vol.42 No.3
Background/Aims: Serum HBV DNA levels are correlated with hepatic histologic activity in chronic HBV infection based on HBeAg. Liver injury may persist, even though HBV DNA are not detected by hybridization assay. This study was to investigate whether serum HBV DNA levels determined by more sensitive quantitative method are correlated with histologic activities in chronic HBV infections. Methods: This study included 66 chronic HBV infected patients. HBV DNA level was quantified by Cobas Amplicor HBV MonitorTM. Results: Serum HBV DNA levels in HBeAg-positive patients were significantly higher than HBeAg-negative patients. In HBeAg-positive patients, serum HBV DNA levels showed a significant negative correlation with portal-periportal activity and fibrosis (r=-0.451, -0.446 respectively). AST levels were correlated with lobular, portal-periportal activity and fibrosis (r=0.432, 0.365, 0.301 respectively), whereas ALT levels were related to lobular activity (r=0.294). Elevated AST levels predicted lobular activity, portal-periportal activity, and fibrosis with moderate to severe degree (OR 1.733, 95% CI 1.083-2.775; OR 1.518, 95% 1.028-2.243, p=0.336; OR 17.897, 95% CI 1.517- 211.208, p=0.022, respectively). Conclusions: In HBeAg-positive patients, serum HBV DNA level correlates inversely with histologic activity. On the other hands AST level correlates with histologic activity and the stage of moderate or severe degree. (Korean J Gastroenterol 2003;42:220-225)
이재민(Lee, Jae-Min),김용(Kim, Yong),배철수(Bae, Cheol-Soo),권대식(Kwon, Dae-Sig) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.2
본 논문에서는 신재생에너지 활용을 위한 다중 추적식 태양광 발전 감성형 LED 가로등을 제안한다. 제안하 는 가로등 시스템은 다중 추적방식의 태양광 추적기능을 갖추고 있고 감성형 고품위 LED 램프와 제어회로를 사용하 여 센서를 통해 입력되는 온도 및 습도를 기반으로 최대의 일조량을 받을 수 있도록 하였다. 신재생에너지 활용의 핵 심 요소인 효율적인 축전지 활용을 위해 충방전 컨트롤러를 개발하였고 원격모니터링 기능 및 제어기능도 구현 하였 다. 제안하는 가로등 시스템은 기존 기술에 비하여 추적 동작이 우수하고 에너지효율이 향상되었으며 기존에 개발되 지 않았던 추적식 태양광 발전 시스템과 감성형 LED를 결합함으로써 차세대 가로등 시스템의 모델로서의 활용될 수 있게 하였다. In this paper, a solar power emotional LED lightening street lamps with multi control sun tracker is presented. The proposed system has a multiple control sun tracking function and high quality emotional LED lamps. The system is designed to absorb maximum sun lights by temperature sensor and humidity sensor of control circuits. A battery charge-discharge controller is developed for high efficient usage of battery charger for utilization of new and renewal energy. An interface circuit for remote monitoring and controlling is included in the developed system. The proposed multi tracking solar power emotional LED street lamps is better than conventional systems in aspect of tracking operation and energy efficiency, and expected to be a leading model for next generation solar power street lamp system, because it is a new technology combining sun tracking solar power system and emotional lightening system.