DW & 메타데이터

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.

Vasopressin의 멜라닌 확산작용에 대하여

홍승길,Hong, Seung-Kil 대한생리학회 1973 대한생리학회지 Vol.7 No.2

It has been reported that vasopressin disperse the melanophore granule of frog skin. The author used hypophysectomized and adrenergic receptor blockaded animals in order to define the mechanism of vasopressin on the melanopore pigment of frog skin. The Rana niglomaculata which could be found in the Seoul area were used on this experiment. The amount of the following drugs were injected into the lymphatic sac of the frog; vaospressin $(0.05\;{\mu}g/g\;B.W.)$, dibenzylin $(0.05\;{\mu}g/g\;B.W.)$, and propranolol $(0.01\;{\mu}g/g\;B.W.)$. The following results were observed; 1. Vasopressin dispersed the melanin granules of melanocyte of frog skin. 2. The melanin granule dispersion activity of vasopressin was observed on the hypophysectomized frog. 3. The melanin granule dispersion was observed on the adrenergic receptor blockaded frog with dibenzylin or propranolol respectively, especially the later one was found to be more obvious. 4. The melanin granule dispersion was observed on the frog which was injected with vasopressin after alpha-receptor or beta-receptor blockade and the later one was found to be more obvious. 5. The melanin granule dispersion was more effective with the blockade of beta-receptor after the treatment with vasopressin on hypophysectomized frog.

토의 - 해결방법 요지

홍승길,유성자,김종숙,전경희,노영희,Hong, S.G. 대한간호협회 1978 대한간호 Vol.17 No.2

현재 우리나라 보건소사업을 Part별로 토의된 것을 대략 요약해보면, 정부에서 근래에 시도하고 있는 진료대상이 한정된 영세민이나 생보호자에게만 국한되어 있으며, 치료보다는 예방에 힘써야 하겠다는 점을 들 수 있겠고, 모자보건의 무료분만을 대폭 완화하여 최소한 보건소에 등록되어 있는 임산부만이라도 모두 혜택을 주는 방향과 적기에 예방접종을 실시하도록 하며, 결핵은 조기발견, 조기치료, 예방접종이 중요하다는 것을 결핵사업에 종사하는 모든 요원들이 주민들에게 인식시킬 것이며, 가족계획에 있어서는 모자보건향상에 목적을 두고 사업이 이루어져야 한다는 점을 아울러 강조한다. 끝으로 선진국은 인구 2,000명에 보건간호원 1인 꼴인데 우리나라는 12,000:1이므로 선진국에 비해 6:1이나 되는 보건간호원의 업무과다로 질적인 사업의 기대가 어려우므로, 인력과 경제소모를 억제할수 있도록 기구개편이 필요하며, 간호원이 가정방문시 기능별로 $4\~5$인의 중복방문으로 인한 인력낭비와 사업 우선 순위가 혼돈되어 전반 간호사업이 시급하다는 점을 들 수가 있다.

병원 입장에서 본 병원 산별교섭의 전망과 과제

홍승길,Hong, Seung-Gil 대한병원협회 2005 대한병원협회지 Vol.34 No.2

논문 분석을 통해 본 유기농업 기술 연구 동향

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.

특허분석을 통한 유기농업 기술 동향

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.

친환경농업: 가축분뇨 액비를 이용하면 화학비료를 덜 쓴다!

홍승길,Hong, Seung-Gil 전국농업기술자협회 2011 농업기술회보 Vol.48 No.2

연구보문 : 식물환경 ; 전과정평가를 이용한 유채재배의 환경영향 평가

홍승길 ( Seung Gil Hong ),남재작 ( Jae Jak Nam ),신중두 ( Joung Du Shin ),옥용식 ( Yong Sik Ok ),최봉수 ( Bong Su Choi ),양재의 ( Jae E. Yang ),김정규 ( Jeong Gyu Kim ),이성은 ( Sung Eun Lee ) 한국환경농학회 2011 한국환경농학회지 Vol.30 No.1

BACKGROUND: High input to the arable land is contributed to increasing productivity with causing the global environmental problems at the same time. Rapeseed cultivation has been forced to reassess its positive point for utilization of winter fallow field. The Objective of this study was performed to assess the environmental impact of rapeseed cultivation with double-cropping system in paddy rice on Yeonggwang district using life cycle assessment technique. METHODS AND RESULTS: For assessing each stage of rapeseed cultivation, it was collected raw data for input materials as fertilizer and pesticide and energy consumption rate by analyzing the type of agricultural machinery and working hours by 1 ton rapeseed as functional unit. Environmental impacts were evaluated by using Eco-indicator 95 method for 8 impact categories. It was estimated that 216 kg CO2-eq. for greenhouse gas, 3.98E-05kg CFC-11-eq. for ozone lazer depletion, 1.78kg SO2-eq. for acidification, 0.28kg PO4-eq. for eutrophication, 5.23E-03kg Pb-eq. for heavy metals, 2.51E-05kg B(a)p-eq. for carcinogens, 1.24kg SPM-eq. for smog and 6,460 MJ LHV for energy resource are potentially emitted to produce 1 ton rapeseed during its whole cultivation period, respectively. It was considered that 90% of these potential came from chemical fertilizer. For the sensitivity analysis, by increasing the productivity of rapeseed by 1 ton per ha, potential environmental loading was reduced at 22%. CONCLUSION(s): Fertilization affected most dominantly to the environmental burden, originated from the preuse stage, i.e. fertilizer manufacturing and transporting. It should be included and assessed an indirect emission, which is not directly emitted from agricultural activities. Recycling resource in agriculture with reducing chemical fertilizer and breeding the high productive variety might be contribute to reduce the environmental loading for the rapeseed cultivation.

겨울논 유채와 보리 재배시 전과정평가 방법을 이용한 환경영향 비교 평가

홍승길(Seung Gil Hong),신중두(Joung Du Shin),박광래(Kwang Lai Park),안민실(Min Sil Ahn),옥용식(Yong Sik Ok),김정규(Jeong Gyu Kim),김석철(Seok Cheol Kim) 유기성자원학회 2016 유기물자원화 Vol.24 No.4

벼 수확 후 겨울철 휴경논에서 유채 재배 시스템의 환경영향을 평가하고 경쟁 작물인 보리 재배 시스템의 환경영향과 비교 분석하기 위하여 전과정 평가방법을 적용하였다. 투입물질에 대한 자료를 수집하고 유채 및 보리 1 ton을 기능단위로 하여 분석하였다. 전과정 영향평가를 위해서는 체계화가 잘 되어있고 규칙적으로 적용된 영향평가 방법인 Eco-indicator 95 방법을 사용하였다. 생산물 1 ton당 발생하는 영향범주별 비교에서는 온실가스 등 6개 영향범주에서 보리보다 유채의 포텐셜이 높게 나타났는데 이 중 화학비료 사용에 의한 환경부하가 전체 발생량의 65-96%를 차지하고 있었다. 부영양화 포텐셜은 오히려 유채보다 보리에서 높게 나타났다. 보리와 유채 재배에서 중금속에 의한 부하가 0.5 Pt로 상대적으로 가장 크게 나타났으나 전체 영향범주값을 합산하게 되면 보리에서 0.78 Pt, 유채에서 0.82 Pt로 나타났다. 시비-수확량 반응 시험에 대한 평가에서 보리는 시비량이 증가할수록 환경부하가 계속 증가하는 것으로 나타났으나 유채는 시비량에 따라 증가하다가 최고 생산량을 보인 R3(80-65-65)에서는 오히려 감소하였다. 이와 같은 결과를 토대로 겨울 휴경논에 유채를 재배할 경우 환경 영향 범주 8개 중 6개 범주에서 기존의 보리를 재배하는 과정에 비해 환경부하량은 더 크다고 할수 있지만 환경지수값으로 환산하게 되면 휴경지에서 유채와 보리 재배를 통한 환경영향에는 차이가 없을 것으로 판단되었다. The application of the Life Cycle Assessment (LCA) methodology to assess the environmental impact of rapeseed cultivation in winter fallow after harvesting rice was investigated and compared with barley cultivation in crop rotation system. Data for input materials were collected and analyzed by 1 ton rapeseed and barley as functional unit. For the Life Cycle Impact Assessment (LCIA) the Eco-indicator 95 method has been chosen because this is well documented and regularly applied impact method. From the comparison of impact categories such as greenhouse effect, ozone depletion, acidification, heavy metals, carcinogens, summer smog, and energy resources for 1 ton of final product, emission potential from rapeseed was higher than that from barley. The range from 65 to 96% of these potential came from chemical fertilizer. On the other hand, eutrophication potential from barley was higher than that from rapeseed, mainly came from utilizing the chemical fertilizer. During the cultivation of barley and rape, environmental burden by heavy metals was evaluated by 0.5 Pt, larger than points from other impact categories. The sum of points from all impact categories in barley and rapeseed was calculated to be 0.78 Pt and 0.82 Pt, respectively. From the sensitivity analysis for barley and rapeseed, scenario 1 (crop responses to fertilization level) showed the environmental burden was continuously increased with the amount of fertilization in barley cultivation, while it was not increased only at the optimum crop responses to fertilization in rapeseed (R3). With these results, rapeseed cultivation in winter fallow paddy contributed to the amounts of environmental burden much more than barley cultivation. It is, however, highly determined that environmental weighted point resulted from evaluating both cultivation was not significantly different.