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조용현(Yong-Hyun Cho),홍성준(Seong-Jun Hong),손현숙(Hyun-Sook Son),이정훈(Jeong-Hun Lee) 한국산업융합학회 2006 한국산업응용학회 학술대회 논문집 Vol.- No.-
본 논문에서는 다중생체신호를 이용한 실시간 인증시스템을 개발하였다. 이용된 다중생체신호는 얼굴과 지문영상 신호이며, 이들 신호들의 효과적인 특징 추출을 위하여 중심이동의 전처리와 주요성분분석을 조합한 새로운 방법을 이용하였다. 실시간으로 얼굴신호를 획득하기 위하여 웹 카메라와 지문 획득기를 이용하였다. 여기서 중심이동은 얼굴과 지문 신호영상에서 불필요한 배경을 배제시켜 계산시간과 인증율을 개선하기 위함이다. 주요성분분석은 각 신호영상의 고유특징을 추출함으로써 중복신호를 제거하여 인증 성능을 개선시키기 위함이다. 제안된 방법을 320*240 픽셀의 얼굴과 지문신호영상 각각 48장(24명*2장)을 대상으로 실험한 결과 우수한 인증 성능이 있음을 확인하였다.
중소기업 맞춤형 물류센터 조성 계획 및 경제적 타당성에 대한 연구
안영효 ( Young Hyo Ahn ),오승철 ( Seung Chul Oh ),조용현 ( Yong Hun Cho ),김용우 ( Yong Woo Kim ) 한국물류학회 2011 물류학회지 Vol.21 No.5
중소기업은 국가 발전과 경제의 원천으로서 대단히 중요한 위치를 차지하고 있다. 최근 중소기업의 경쟁력은 고비용·저효율 구조로 약화되고 있는데, 특히 대 기업과 비교해 개선의 여지는 매우 크나 실제 크게 개선되지 않은 부분이 유통·물류(비)라 할 수 있다. 중소기업은 유통·물류에 대한 투자 여력이 부족하여 유통채널과 물류관리 등을 독립적으로 구축하기 쉽지 않은 실정이다. 중소기업의 경쟁력 강화를 위한 대책이 필요하며, 대형 유통기업의 진출 확대로 어려움을 겪고 있는 중소 소매업 및 도매업의 경쟁력 강화와 유통·물류효율성 제고 필요성 증대에 부응할 유통체계의 혁신적인 연구가 필요한 시점이다. 따라서 중소기업이 제조한 생활용품(소비재)의 공동구매 및 공동배송시스템을 구축하기 위한 물류센터의 조성이 필요하다. 본 연구는 중소기업의 경쟁력 강화라는 차원에서 중소기업을 위한 물류센터 조 성의 필요성과 물류센터 개발 방안, 그리고 물류센터 조성에 대한 경제적 타당성을 분석한다. Small and medium businesses take an very important position as a foundation of national development and economy. Recently, the competitive power of small and medium-sized businesses have been weakening due to its structure of high costs and low efficiency. Especially, their distribution and logistics have plenty of room to be improved but is not improved actually compared with those of big companies. It is not easy for small and medium-sized businesses to implement distribution channels and logistics management by themselves owing to the lack of investment capability. It is necessary to develop measures to reinforce the competitive edge of small and medium-sized enterprises and do research on an innovative system for their distribution and logistics while they have difficulty competing with big businesses. Therefore, it is necessary to establish a logistics center to implement the system for group purchasing and delivery of consumer products manufactured by small and medium businesses. This study analyzes the necessity of building a logistics center, development of a logistics center and its economic validation.
만성 실질성 간질환 환자 혈청에서 ProcollagenⅠ Propeptide 와 Procollagen Ⅲ Propeptide 농도의 상관성
조용현,박동일,김병훈,조윤주,이동후,이승환,백인규 대한간학회 1996 Clinical and Molecular Hepatology(대한간학회지) Vol.2 No.1
Background/Aims:Most liver diseases lead to a pathobiochemical reaction termed liver fibrosis. Hepatic fibrosis is not a uniform phenomenon and it comprises increased deposition of the liver connective tissue components(collagen, noncollagenous glycoprotein, proteoglycan) in the intercellular space, leading to disturbances of intrahepatic blood flow and hindrance of exchange processes between blood and cells, Fibrosis can be determined by morphological examination o f the liver, but this approach cannot be used to assess accurately the activity of collagen synthesis at any given point in time, Thus, the development of biochemical markers of hepatic fihrosis might allow a promising diagnostic approach for the identification and quantitation of this process, Aminoterminal procollagen III pn)peptide(PIIINP) and carboxytermina1 procollagen I propeptide(PICP) are known as the most widely used parameter for evaluating liver fibrosis, but it is diAicult to find previous report discribing the correlation ot each other. To elucidate the clinical significance of the corretation of PICP(x) and PIIINP(y) concentrations in patients with chronic liver diseases, radioimmunoassay was employed in this investigation. Methods:Sera tested were obtained from pathologically proven 43 patients;4 cases of fatly liver, 11 cases of chronic persistent hepatitis, 13 cases of chronic active hepatitis, l5 cases of liver cirrhosis. All the patients except 4 cases ot fatty liver were shown positivity of HBsAg. PICP and PIIlNP radioimmunoassay kits(Farrnos Diagnostica, Oulunsalo, Finland) wcre purchased for this study. Results:In the patients among the three groups of chronic active hepatitis, liver cirrhosis, chmnic persistent hepatitis, the correlations were significant in orders(y= - 10.27 +0.l3938x, r=0.92286, p=0.000007;y=-1.185+0.06611x, r=0.73656, p=0.001737;y=1.1174+0.03273x, r=0.56879, p=0.067849). Four cases of fatty liver reveal no signiticant correlation(y=4,8671- 0,0079x, r= 0.1959, p=0.804054). Conclusion:0n the basis of these data, we s st that the correlation of each showed a significant increase with heightening degree of inflammation, activity of diseases and fibrosis.
Ethylnitrosourea 에 의한 마우스 간소엽내 전암 병소의 중심정맥주변구역 편향성
김종철,김병훈,정철헌,이동후,이숭환,조용현,조영중,양성규,유병무 대한간학회 1997 Clinical and Molecular Hepatology(대한간학회지) Vol.3 No.3
Background/Aims: Hepatocytes on the hepatic lobule mipate from portal zone to centrilobular mea as the DNA synthesis within it. And also, the xenobiotic reactions reveal characteristic differences associated with zone specific metabolism in the liver acinus. In this study, the zonal distribution of ethylnitrosourea (ENU)-induced hepatic precancerous lesion was stereologically investigated. Methods: Nine B6C3F1 mices were given I.p. injection of ENU (60 ㎍/pn body weight) when the pups were 15 days old prior to sacrifices at 8 weeks of life. All the 150 consecutive sections, 3 p m in thickness, were stained with hematoxylin and eosin and identified the basophilic precancerous lesions with 80-165 p m diameter in equatorial plane by the Zeiss microprojector. And then the distances from the center of selected foci to terminal hepatic vein or portal vein branches were estimated under the microscopic fields. As a control group, the same estimations were performed from the random points by the appointments of random digit table. Results: Mean distance between ENU-induced 52 hepatocellular foci and the nearest terminal hepytic vein was 181.15±112.39 p m (Mean±SD), but that of randomly selected 104 points was 291.73±157.98pm (Mean+5D) (Students t-test, p$lt;0.0005). Substantially, 52.7% of ENU-induced 52 hepatocellular foci were within 300 p m from the terminal hepatic vein, but randomly selected 104 points were only 50.9% (Shapiro Wilk W test, w=0.819857, p=0.048038). Mean distance from ENU-induced 52 foci to portal vein was 398.85±149.98pm (Mean+SD), but that from the randomly selected 104 points was 315.87±145.79 pm (Mean±SD)(Students t-test, p$lt;0.0005). Conclusion: Stereologically, ENU-induced mice liver cell foci distribute non-randomly to Zone III, centrilobular zone of mouse hepatic acini where promote invasion toward terminal hepatic veins. (Korean J Hepatol 1997;6:227 240)