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( Yoonae A. Cho ),( Sang Hoon Rah ),( Myung Mi Kim ),( Joo Yeon Lee ) 대한안과학회 2008 Korean Journal of Ophthalmology Vol.22 No.2
Purpose: To evaluate the effect of transposition procedures on the vertical rectus muscle (VRM) in the patients who underwent a medial rectus muscle (MR) transection after endoscopic sinus surgery (ESS). Methods: In 4 patients with exotropia (XT) and a lack of adduction after ESS, orbital CT or MRI revealed a complete transection of the midportion of the MR. Full-tendon VRM transposition was performed within 3 months after injury (early surgery) in 2 patients with 40△ XT. Two patients with 70△ and 85△ XT underwent an X-type augmented Hummelsheim procedure, which involved pulling each half-tendon and crossing it through the undersurface of the severed MR to the other end of the MR insertion, concurrently with an ipsilateral lateral rectus (LR) recession 11 months and 36 months after ESS, respectively. The adduction deficits were divided into -1 through to -8. The patients were followed up for more than than 1.5 years. Results: Postoperatively, 3 patients showed orthophoria and no diplopia in the primary position. The adduction deficits improved to -3.5 or -4. One patient who underwent an X-type augmented Hummelsheim procedure showed a residual XT of 25△. Conclusions: VRM transposition is effective in correcting a large XT secondary to a MR transection after ESS. When a longstanding large-angle XT with severe contracture of the ipsilateral LR and massive scarring of the adjacent tissues is present, the X-type augmented Hummelsheim procedure coupled with an ipsilateral LR recession had an augmenting effect.
Real-time Location Tracking Function for Mobile Object
YoonAe Ahn 한국멀티미디어학회 2008 한국멀티미디어학회 학술발표논문집 Vol.2008 No.2
If continuously mobile objects are managed by a conventional database management system, the system cannot properly process the past and future location which is not stored in the database. Up to now, for the purpose of location tracking which is not stored, the linear interpolation to estimate the past location has been usually used. It is suitable for the mobile objects on linear route, not curved route. In this paper, we propose a past location tracking function for a mobile object on curved routes, and also suggest a future location tracking function using some past location information.
개방형 상황인식 구조에서 위치기반 서비스 관리자의 설계
안윤애(YoonAe Ahn),박정석(JeongSeok Park) 한국멀티미디어학회 2008 한국멀티미디어학회 학술발표논문집 Vol.2008 No.1
위치기반 상황인식 서비스가 일반인들의 생활환경 곳곳에 유비쿼터스 컴퓨팅 환경을 실현할 수 있는 계기를 마련해주기 위해서는 다양한 이동 장치들에서 서비스되어야 하므로 개방형 상황인식 서비스 구조를 제공해야 한다. 이 논문에서는 유비쿼터스 위치기반 상황인식 서비스에서 주요 초점이 되는 위치정보 서비스 관리자를 개방형 플랫폼에 맞게 설계한다. 제안 모델은 컨텍스트 관리자, 시공간 관리자, 추론엔진, 컨텍스트 히스토리, 지식베이스로 구성되며 시공간 관리자를 상황인식 추론 처리과정에 도입함으로써 기존의 서비스 기능보다 좀 더 다양한 시공간 상황 추론이 가능한 구조를 가진다.