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On uniform asymptotic stability of the nonlinear differential system
오영선,안정향,Oh Young Sun,An Jeong Hyang Korea Society of Industrial Information Systems 2004 한국산업정보학회논문지 Vol.9 No.4
We investigate various $\phi(t)-stability$ of comparison differential equations and We obtain necessary and/or sufficient conditions for the asymptotic and uniform asymptotic stability of the differential equations x'=f( t, x)
복분자(覆盆子), 석창포(石菖蒲), 상침자 및 숙지황(熟地黃)이 모발성장(毛髮成長)과 면포에 미치는 실험적(實驗的) 연구(硏究)
오영선,노석선,오민석,Oh, Young-Sun,Roh, Sek-Seun,Oh, Min-Suck 대한한방안이비인후피부과학회 2006 한방안이비인후피부과학회지 Vol.19 No.3
The effects of four extracts of medicinal herbs, Rubus coreanum, Acorus calamus, Morus alba and Rehmannia glutinosa on hair growth activity and acnes control were investigated. In the course of screening natural extracts for hair growth, we found that the extract of dried root of Rubus coreanum has the hair growth promoting effect. After topical application of these extracts to the back of C57BL/6 mice, the earlier conversion of telogen-to-anagen phase was induced. The growth of dermal papilla cells and mouse vibrissae hair follicle cultured in vitro, however, was not affected by treatment of these extracts. Furthermore these extracts do not possesspotent inhibitory effect on $5{\alpha}-reductase$ I and II activity and anti-bacterial effect on Escherichia coli , Propionibacterium acnes, Pityrosporum ovale, Staphylococcus aureus, Staphylococcus epidemidis, and Candida albicans. RT-PCR analysis showed that these extracts did notinduce mRNA levels of growth factors such as insulin-like growth factor-I, keratinocyte growth factor, hepatocyte growth factor and vascular endothelial growth factor in dermal papilla cells. These results suggest that Rubus coreanum has hair growth promoting effect. However, the effects of these materials on the hair growth promotion are not mediated through inhibition of $5{\alpha}-reductase$ I and II activity, stimulation of hair follicle cells and expression of growth factors in the dermal papilla cells.
퍼지이론과 임베디드장치를 이용한 실시간 고장예지 시스템 개발 -사출성형 중심으로-
오영선 ( Young Sun Oh ),신현재 ( Hyun Jae Shin ) 대한설비관리학회 2011 대한설비관리학회지 Vol.16 No.1
The objective of this study is to develop an efficient and practical real-time fault detection and prognostic system framework which is providing consistent useful information from sensed operating condition information. This system framework uses ideas combining expert knowledge that supplied by expert or experienced worker, resultant expert system database, real-time sensor information and fuzzy inference as the way to improve the performance of prognostic ability of proposed RFDPS system. The RFDPS model consists of four parts; embedded devide hardware part related to sensor, fuzzy inference/experts system part for describing uncertain status by fuzzying sensor signal, software part and database part for prognosis of quality condition monitoring on injection molding machines.
강의실 자동화를 위한 유비쿼터스 환경에서의 서비스 제어 구조
오영선(Oh Young-Seon),김병선(Kim Byoung-Sun),이현태(Lee Hyeun-Tae) 한국콘텐츠학회 2004 한국콘텐츠학회 종합학술대회 논문집 Vol.2 No.2
본 논문은 유비쿼터스 컴퓨팅 환경에서의 강의실 자동화를 살현하기 위한 서비스 제어 구조와 사용자 인터페이스를 설계한다. 서비스 제어를 위하여 UPnP 프로토콜을 기반으로한 서비스 제어구조를 제안하고 강의실에서의 서비스 시나리오를 설계하고 이를 위한 사용자 인터페이스를 설계하였다. 제안한 유비쿼터스 환경에서의 미래의 강의실 환경은 상황인지 컴퓨팅 능력을 이용하여 이용자에게 적응적인 사용자 인터페이스를 제어하고 사용자의 동작 이벤트를 인지하여 지능적인 강의 콘텐츠의 제작을 가능하게 함을 보여준다. In this paper, we propose a service control framework and user interface in a class automation of ubiquitous computing environment. We propose UPnP-based service control architecture and introduce an example service scenarios for automatic classroom. We present context-aware design approaches to argument user interface. We also present intelligent content authoring that facilitates producing e-learning content using activity context.