http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유대현,장세진,김성윤,이중달,강위석,김목현,김태화,변정원,장정순 대한내과학회 1989 대한내과학회지 Vol.37 No.3
Polyarteritis nodosa is one of the necrotizing vasculitis involving predominantly small and medium sized arteries. Polyarteritis nodosa may affect many organs such as kidney, heart, liver, gastrointestinal tract and muscle. In several autopsy studies, gall bladder involvement was found in 10 to 40% of patients with this disease. Rarely polyarteritis nodosa may be presented clinically as acute cholecystitis or chronic cholecystitis. We experienced a case of polyarteritis nodosa presenting as acute cholecystitis, diagnosed by pathological examination of a gall bladder specimen surgically removed.
무선 바이오센서 네트워크에서 에너지 효율을 고려한 해충 감지 시스템을 구축하기 위한 프로토콜
유대현,이주상,안병구,김남수 한국인터넷방송통신학회 2008 한국인터넷방송통신학회 논문지 Vol.8 No.2
본 논문에서는 무선 바이오센서 네트워크를 이용하여 에너지 효율을 고려한 홈 네트워크 해충 감지 시스템프로토콜을 제안한다. 제안된 프로토콜의 기본 아이디어 및 특징은 다음과 같다. 첫째, 소스와 목적지 사이의 경로를 설정하기 위한 에너지 효율과 안정성 기반의 시분할적인 트리 구조 경로 설정방법. 둘째, 멀티홉을 이용한 방향성이 있는 Data Gathering 구조이다. 설정된 트리구조의 경로위로 패킷 데이터를 전송 할때 전력 절약 및 경로의 lifetime을 효과적으로 지원하기 위해서 선택적 플러딩을 사용한다. 이로 인해 각노드의 전력을 절약하고 전송 지연(transmission delay)를 줄임으로써 전체 네트워크의 lifeime이 향상되고 홈 네트워크상의 효율성이 향상된다. 제안된 프로토콜의 성능평가는 OPNET (Optimized Network Engineering Tool)을 사용하여 이루어진다.
In Vitro 환경에서 엘라스틴을 혼합한 콜라겐 진피 지지체의 내구성
유대현,홍종원,탁관철 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.1
Purpose: Since the report of artificial dermis manufacturing method using collagen by Yannas in 1980, collagen has been effectively used as dermal substitute with its merits such as, lower antigeneicity, controllable biodegradation rate, and minimal inflammatory cytotoxic properties in the dermal tissue engineering field. However, weak mechanical durability was the main drawback of collagen dermal substitute. To improve its stability, mechanical or chemical cross-linking was used. Despite of such process, its clinical use was restricted due to weak durability. To improve the durability of collagen matrix, we designed elastin-incorporated collagen matrix and compared its durability with conventional collagen matrix.Methods: 15mm diameter with 4mm thick collagen dermal matrix was made according to Yannas protocol by mixing 0.5% bovine collagen and chondroitin-6- sulfate followed by degassing, freeze drying, dehydrodermal cross-linking and chemical cross-linking procedure. In elastin incorporated collagen matrix, same procedure was performed by mixing elastin to previous collagen matrix in 4:1 ratio(collagen 80% elastin 20%). In comparison of the two dermal matrix in vitro tests, matrix contracture rate, strain, tensile strength, was measured and stiffness was calculated from comparative analysis.Results: In terms of matrix contracture, the elastin- incorperated added collagen dermis matrix showed 1.2 times more contraction compared to conventional collagen matrix. However, tensile strength showed 1.6 times and stiffness showed 1.6 times increase in elastin- incorporated matrix.Conclusion: Elastin incorperated collagen matrix manufactured by our team showed increased durability due to improvement in tensile strength and stiffness compared to previous collagen matrix(Integra??).
유대현 한양대학교 의과대학 1998 한양의대 학술지 Vol.18 No.1
Rheumatoid arthritis(RA) is an autoimmune disorder of unknown etiology characterized by symmetric, erosive synovitis and sometimes multisystem involvement. Most patients exhibit a chronic fluctuating course of disease that, if left untreated, results in progressive joint destruction, deformity, disability, and premature death. Optimal management of requires early diagnosis and timely introduction of agents that reduce the probability of irreversible joint damage. The development of immunology and biotechnology have changed the management of RA: a strategy based on long-term treatment with nonsteroidal anti-inflammatory drugs and the addition of second line agents only in a later phase of disease (pyramid theraphy) has evolved to a more aggressive approach with the early intorduction of second line drugs in most patients with RA. Here I would like to review briefly advances of pathogenic mechanisms and current trend of RA treatment.