http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
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류홍석(Hong-Seok Ryu),정용진(Yong-Jin Jeong),민상원(Sang-Won Min),정광모(Kwang-Mo Jeong) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅲ
VoIP(Voice over Internet protocol)는 일반 전화망이 아닌 인터넷 망을 통해 실시간 데이터인 음성을 전송하는 방식으로 음성 통신 비용의 절감 효과와 다양한 서비스로 인한 부가 가치를 통해 개인, 기업, 기간 통신 사업자들에게 큰 이득을 가져다 줄 수 있다. 이러한 추세에 발맞추어 본 논문에서는 RTLinux 기반에서 VoIP 게이트웨이를 구현 함으로서 실시간 처리를 요하는 시스템의 개발기간 단축과 시스템 성능 향상을 목적으로 시스템을 구현하였다. RTLinux는 기존 리눅스 커널 위에서 동작하며, 또한 하드리얼타임을 제공하여 리눅스가 가지고 있던 실시간 처리 문제를 극복할 수 있다. 구현한 시스템은 end-to-end 간에 코덱 (G.723.1)을 전송한 후 프레임간 Delay와 Jitter, loss를 측정하여 기존 리눅스와 RTLinux간의 시스템 성능을 비교 테스트 하였으며, 그 결과 기존 리눅스에 비교하여 RTLinux 기반의 게이트웨이가 코덱이 제한 하는 시간 안에 음성 전송을 처리 함으로서 실시간 처리를 요하는 시스템 개발에 적절한 솔루션임을 확인하였다.
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東西方向 植栽 茶園에서 新芽의 生育 및 成分含量 變化에 따른 摘採時期의 決定
김영걸(Young-Gul Kim),류홍석(Hong-Seok Ryu),이진호(Jin-Ho Lee) 한국차학회 2000 한국차학회지 Vol.6 No.3
Changes of leaf growth and chemical components in the first crop of tea of Cheju area between north and south of plucking surface at different plucking date were studied. The results obtained are as follows. The north of plucking surface was earlier than the south about 0.6~1 leaf age, and optimal plucking date was l May in the north of plucking surface, and 8 May in the south of plucking surface. One hundred fresh bud weight was 51.3g in the north of plucking surface, 34.2g in the south of plucking surface on 10 May, and daily mean growth rate was 15% both north and south. The change of total nitrogen content was decreased with growing. Optimal plucking date should be decided before total nitrogen content is decreased below 5%. The content of free amino acid had the time of rapid decrease, tea leaves should have been plucked before this time came. The change of theanine content was the same as change pattern of free amino acid. Changes of caffeine and tannin contents were the same as that of total nitrogen content which was decreased with growth, but they could not become a base of plucking date because they did not show a positive correlation to quality. The content of NDF-ash was increased with growing, but it was a negative correlation to quality. To summarize above mention study, optimal plucking date of the first crop of tea in Cheju island in 2000 was 6 May in the north of plucking surface, 8 May in the south of plucking surface, and 6 May when both were plucked at the same time.
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濟州地域 茶園에서 土性과 窒素施肥方法이 窒素 溶脫에 미치는 영향
이진호(Jin-Ho Lee),김영걸(Young-Gul Kim),류홍석(Hong-Seok Ryu) 한국차학회 2003 한국차학회지 Vol.9 No.1
As one of the measures to fine a way to improve the fertilization efficiency based on soil quality in Jeju Island's tea garden, we investigated the leaching volume of nitrogen constituents included in the fertilizer between the clay loam soil ("A testing soil") and the gravel soil (66% of gravels, "B testing soil"). The leaching water volume to the subterranean water enlarged when the rainfall increased. The leaching water volume in B testing soil occupied 67% of the rainfall (vs. 55% in A testing soil). B testing soil's annual leaching volume of nitrogen constituents in heavy fertilization (90kgN/10a) recorded 45.7kgN/10a, which was larger than 38.25kgN/10a of A testing soil. The leaching volume of nitrogen constituents was the largest in heavy fertilization of both testing soils, followed by slow-releasing fertilizer, 30% reduced fertilization, 50% reduced fertilization. The yield of first crop of tea was smaller in B testing soil which had larger leaching volume of nitrogen constituents than A testing soil. In addition, the chemical leaf contents such as T-N and amino acids - which set the quality of tea leaf - were similar in both testing soils.
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