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홍승길,김진호,김용기,신재훈,윤종철,박동식,Hong, Seung-Gil,Kim, Jin-Ho,im, Yong-Ki,Shin, Jae-Hun,Yun, Jong-Chul,Park, Dong-Shik 한국유기농업학회 2014 韓國有機農業學會誌 Vol.22 No.3
To investigate the technology trends in organic farming using patent analysis, total 1,026 patents in organic farming in Australia, EU, Japan, Korea and USA between 1974 and 2014 were analyzed. The number of the patents applied in organic farming was largest in Korea, followed by Japan and the USA. Since 2000, the patent application in Korea and USA increased drastically, while in Japan the patents in organic farming were applied steadily in the late 1980s. The applied patents in organic farming were mainly dominated in the field of organic production technology (AA) especially in Korea, while those in environmental assessment were merely applied. Most patent appliers were biased to private applier (80%) than national institutes including university. With this study, it is highly recommended that national interests and R&D on the organic farming fields are needed to meet the food safety.
망 효율성을 고려한 P2P 스트리밍 시스템 설계 및 구현
홍승길,박승철,Hong, Seung-Gil,Park, Seung-Chul 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.3
Recently, many researches on P2P overlay network-based multimedia streaming services have been actively performed because of their high scalability and cost-efficiency advantages. However, P2P overlay networks also have the shortcoming of generating higher traffic owing to their unicast-based one-to-many multimedia deliveries. In order to reduce the traffic generated by the P2P streaming overlay network, we propose an ISP and locality-based parent node discovery method and check its feasibility through an implementation of a prototype streaming system. The measurement of RTTs and hop counts for random nodes having different ISPs and localities shows the proposed method to be able to shorten about 32% RTTs and about 17% Hop counts. P2P 오버레이 네트워크는 높은 확장성과 저렴한 비용 등을 장점으로 가지고 있어 이 구조를 활용하여 멀티미디어 서비스를 제공하는 P2P 스트리밍 기술에 관한 연구가 활발히 진행되고 있다. 하지만, P2P 오버레이 구조는 일대다 유니캐스트의 형태로 데이터를 전달하기 때문에 많은 네트워크 트래픽을 유발시키는 단점을 지니고 있다. 이에 따라 본 논문에서는 ISP여부와 물리적 지역정보를 활용하여 부모노드를 선택함으로써 네트워크 트래픽을 적게 유발시킬 수 있는 부모노드탐색기법을 제안하고, 이를 탑재한 P2P 스트리밍 시스템을 구현하여 제안 기법 실현 가능성을 검증한다. 구현한 P2P 스트리밍 시스템을 평가하기 위해 임의의 ISP와 지역을 갖는 노드들에 대해 RTT와 Hop count를 측정하여 동일 ISP일 경우 약 32% 적은 RTT와 약 17% 적은 Hop count를 보임을 확인하였다.
홍승길,Hong, Seung-Gil 한국데이터베이스진흥원 1999 디지털콘텐츠 Vol.3 No.-
어떤 정보가 어디에 위치하고 그 내용이 어떤 것이며 어떤 기준으로 그러한 자료가 생성되었는가에 대한 정보들이 일관되고 통합되어 제공되지 않는다면 그 데이터 웨어하우스는 몇몇 사람만이 사용하는 전유물이 될 것이다. 데이터 웨어하우스에서 이런 것이 방지하기 위해서는 메타데이터의 역할을 정확히 이해하고 활용해야 한다. 이 글에서는 데이터 웨어하우스 구축시 메타데이터의 역할과 중요성에 대해 살펴보기로 한다.
홍승길,이상범,박광래,이민호,남홍식,김진호,윤종철,박동식,Hong, Seung-Gil,Lee, Sang-Beom,Park, Kwang-Lai,Lee, Min-Ho,Nam, Hong-Shik,Kim, Jin-Ho,Yun, Jong-Chul,Park, Dong-Shik 한국유기농업학회 2014 韓國有機農業學會誌 Vol.22 No.4
To investigate the technology trends in organic farming using journal article analysis, total 2,378 published articles in organic farming between 1974 and 2014 were analyzed. The number of the articles published in organic farming has been steadily increased since 2006. As for category, articles in the field of producing the safe organic products and management (A) were published relatively dominantly, especially division of nutrient and soil management (AA). In the foreign countries, lots of articles in environmental assessment and safety field (B) were published than Korea. the main institutes published the articles in organic farming were Swedish University, Sweden and US department of Agriculture, USA. In case of Korea, the articles in the field of environmental assessment and safety (B) were relatively merely published, especially division of environment in organic farming (BA). With this study, more research based on the environment and safety fields in organic farming should be focused on.
04 포스터 발표 : 토양 환경 분야(PS) ; PS-25 : 토양 유기 탄소 분획 분석법 비교
홍승길 ( Seung Gil Hong ),신중두 ( Joung Du Shin ),박광래 ( Kwang Lai Park ),이상범 ( Sang Beom Lee ),이초롱 ( Cho Rong Lee ),김민기 ( Min Gi Kim ),김진호 ( Jin Ho Kim ),안민실 ( Min Sil Ahn ),김석철 ( Seok Cheol Kim ),헤닝쉬둥 ( H 한국환경농학회 2015 한국환경농학회 학술대회집 Vol.2015 No.-
Carbon sequestration is emerging issue and soil organic matters are receiving high attention in regards to the global climate change. It is important to determine the soil organic carbon (SOC) fractions such as WESOC (water extractable soil organic carbon), and an incubated carbons as CO2 to evaluate carbon sequestration in soil. However, the analyses for those contents are time-consuming procedure. In this study the feasibility of MIRS (Mid-Infrared Spectroscopy) for determining the WESOC and an incubated carbon. Oven-dried soils at 100℃ and 350℃ were scanned with MIRS and compared with the chemically analyzed WESOC and carbon dioxide generated during 30, 60, 90, 120 days incubation, respectively. It was observed that an optimized determination coefficient was 0.6937 between WESOC and untreated soils pre-processed by spectrum vector normalization (SNV) and 0.8933 between Incubated soils for 30 days and oven--dried soils at 350℃ after subtracting air-dried soil processed by 1st derivatives.