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양자 교환된 리튬나오베이트를 이용한 광 픽업용 λ/2 파장판 제작
손경락,김광택,김영조,송재원,박경찬,김진용,Son, Gyeong-Rak,Kim, Gwang-Taek,Kim, Yeong-Jo,Song, Jae-Won,Park, Gyeong-Chan,Kim, Jin-Yong 대한전자공학회 2000 電子工學會論文誌-SD (Semiconductor and devices) Vol.37 No.4
본 논문에서는 리튬나오베이트 기판 상에 벤젠산으로 양자 교환 후 습식 식각하는 방법을 이용하여 청색레이저 다이오드를 광원으로 사용하고자 하는 광 픽업을 위한 λ/2 파장판을 제작하였으며 소자의 기능과 제작과정에 대해서 상세히 서술하였다. 그리고, 소자제작을 위한 최적의 조건을 실험을 통하여 확립하였다. 제작된 소자의 위상 특성은 광학계로 마하젠더 간섭계를 구성하여 파장이 632.8nm인 헬륨-네온 레이저로 측정하였다. 측정 결과 위상오차는 +5°∼6°(3% 이내)로 측정되었다. 본 연구에서 제작한 파장판은 청색 레이저 다이오드를 광원으로 사용하는 광 픽업 시스템의 해상도와 안정도를 향상시키는 유용한 소자로 응용될수 있다. In this paper, we have been fabricated λ/2 phase plates lot an optical pick-up using a blue violet laser diode by employing proton exchange and wet etching in LiNbO$_{3}$. Their functions and fabrication processes are described in detail. It is established the optimal fabrication conditions through the experimental results. The device characteristics are measured by the Mach-zender interferometer which is composed of the optical components and 632.8nm He-Ne laser. The measured phase error was +5$^{\circ}$~ -6$^{\circ}$(within 3%). This phase plate could be applied an useful device to improve the resolution and the stability of the optical pick-up which has a blue violet laser diode as an optical source.
국내 가축에서 Salmonella I 4,[5],12:i:-의 최초 분리 사례
이덕용,강민수,권용국,안병기,김영조,허은정,문진산,이에스더,박혜민,Lee, Deog-Yong,Kang, Min-Su,Kwon, Yong-Kuk,An, Byung-Ki,Kim, Young-Jo,Heo, Eun-Jeong,Moon, Jin San,Lee, Esther,Park, HyeMin 대한수의학회 2012 大韓獸醫學會誌 Vol.52 No.4
Salmonella I 4,[5],12:i:- was a monophasic variant of Salmonella (S.) Typhimurium and notorious for re-emerging candidate which would replace S. Typhimurium DT104 for antibiotic resistance. Recently, isolation rate was increased on human and industrial animals but there was no case in domestic animals but human in Korea. This was first isolation case from domestic animals in Korea. The five isolates from feces of duck (n = 3), chicken (n = 1), and wild bird (n = 1) showed antibiotic resistance against cephems and aminoglycosides. These means that the spread of emerging bacterial pathogens to domestic animals and the need of systemic management for Salmonella I 4,[5],12:i:-.
고콜레스테롤혈증 환자에서 Simvastatin(Zocor®) 단기 투여후 효과와 안정성 평가
김민경 ( Min Kyoung Kim ),박용호 ( Yong Ho Park ),박종선 ( Jong Sun Park ),신동구 ( Dong Gu Shin ),김영조 ( Young Jo Kim ),김기식 ( Gi Sik Kim ) 영남대학교 기초/임상의학연구소 2003 Yeungnam University Journal of Medicine Vol.20 No.2
Background : Hyperlipidemia is the one of the major risk factors causing the atherosclerosis of coronary arteries. Treatment of hyperlipidemia with drugs has been confirmed the effects of therapy showing a decreased incidence of coronary artery disease. Simvastatin is a new drug of HMG-CoA reductase inhibitors and the short-term hypolipidemic effects and safety of simvastatin is evaluated in patients with hyperlipidemia. Methods: We studied 63 patients (39 males and 24 females, mean age 58) for 12 weeks whose plasma levels of total cholesterol were higher than 240 mg/dL or higher than 220 mg/dL with ischemic heart disease. Simvastatin was administered 20 mg/day and measured lipid profile at 12 week interval. Result: 1) Simvastatin significantly reduced the level of the plasma total cholesterol(-29.3%), LDLcholesterol(- 36.9%) and triglyceride(-13%)(p<0.05) but the level of HDL-cholesterol was not changed after 12 weeks simvastatin therapy. 2) the clinical symptoms and laboratory examination before and after simvastatin treatment showed no particular abnormal findings in short term follow up. Conclusion: These results suggested that short-term simvastatin therapy in patients with hyperlipidemia seeems to be very effective and safe.