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김영균,도재혁 한국통신학회 2002 정보와 통신 Vol.19 No.7
The advent of Third Generation (3G) communication systems, with their ability to process real-time multimedia applications and their large bandwidths, will greatly enhance mobile Internet access. Not only does Wideband Code Division Multiple Access (WCDMA) and cdma2000 radio technology offer an advantageous density for voice in terms of spectral efficiency, it also supports higher rates and offers differentiated levels of duality of Service (QoS) for data applications. The early introduction of packet and multimedia technologies will be a key element in realizing a quick and successful return on the operator's investments in Universal Mobile Telecommunications System (UMTS) and cdma2000.
연교 추출물 Pinoresinol와 Tamiflu의 병용효과로부터 Influenza Virus 감염에 의한 세포사멸 억제효과
김영균,김상태,김장수,최영웅 한국생약학회 2011 생약학회지 Vol.42 No.1
The fruit body of Forsythiae Fructus (Oleaceae), a common Korean medical herb, is widely used in the treatment of cold and inflammation. In order to elucidate the action mechanism and the active principles from the plant against anti-influenza virus, the influenza virus hemagglutinin (HA) and neuraminidase (NA) gene RT-PCR and Viral Screening & Identification (VSI) assay were conducted, and the activity against viral replication was also investigated. Consequently, one active constituent,namely pinoresinol showed the in vitro antiviral principle using a cytopathic effect (CPE) reduction method, indicating pinoresinol possessed anti-influenza viral activity. Furthermore, combination of pinoresinol and Tamiflu exhibited higher activities than Tamiflu alone against influenza virus (H3N2) infection. The results suggested that combination of pinoresinol with Tamiflu could be a better candidate for an ant-H3N2 viral agent in the treatment of the influenza.
편백나무(Chamaecyparis obtusa Sieb. et Zucc)에서 Catechin의 분리
김영균,고영남 國民大學校 山林科學硏究所 2000 山林科學 Vol.12 No.-
Catechin was isolated from Chamaecyparis obtusa. The bark of the sample was grinded and extracted with MeOH, followed by fractionation with dichloromethane and water. A compound corresponding to the major spot on the TLC of water layer was attempted to separate and its structure was analyzed with NMR spectroscopy. As a result, it is conformed that (+)-catechin is the major components in the aqueous layer of the species.
실영상 시공간 영상분석과 시뮬레이션 환경생성을 통한 하천 수면 검출
김영균,박강 한국CDE학회 2023 한국CDE학회 논문집 Vol.28 No.3
In this study, we propose a method of detecting the water surface through spatio-temporal image analysis and verifying it through simulation. The water surface detection algorithm utilizes com- puter vision to detect the intensity changes in the water surface and non-water surface on a video stream. By calculating the standard deviation of the changes in image intensity, the water surface can be detected since its standard deviation is usually greater than those of the non- water surfaces (non-water areas) which are usually fixed objects or buildings. The water sur- face detection algorithm was successfully developed, and it accurately extracts the water sur- face area. A simulation environment was built to verify the water surface detection algorithm. The real river environment and the motion of the water surface were simulated using the Unre- alTM engine by setting various physical conditions. This verified the algorithm for long-term changes that are difficult to observe in a real environment.
김영균,김성윤,장경훈,김경식 제주대학교 산업기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.1
A networked environment has the possibility of the illegal access to the thread of a network attack. The new IDS(intrusion detection system) using autonomous agent is proposed in this paper, this IDS allow it easily extended, configured and modified, either by adding new components, or by replacing components when they need to be updated.