• Title/Summary/Keyword: 공동자원

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NetFPGA-based Scheduler Implementation and its Performance Evaluation for QoS of Virtualized Network Resources on the Future Internet Testbed (미래인터넷 테스트베드 가상화 자원의 QoS를 위한 NetFPGA 기반 스케쥴러 구현 및 성능 평가)

  • Min, Seok-Hong;Jung, Whoi-Jin;Kim, Byung-Chul;Lee, Jae-Yong
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.48 no.8
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    • pp.42-50
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    • 2011
  • Recently, research activities on the future internet are being actively performed in foreign and domestic. In domestic, ETRI and 4 universities are focused on implementation of a testbed for research on the future internet named as 'FiRST(Future Internet Research for Sustainable Testbed)'. In the 'FiRST' project, 4 universities are performing a project in collaboration named as 'FiRST@PC' project that is for an implementation of the testbed using the programmable platform-based openflow switches. Currently, the research on the virtualization of the testbed is being performed that has a purpose for supporting an isolated network to individual researcher. In this paper, we implemented a traffic scheduler for providing QoS by using the programmable platform that performs a hardware-based packet processing and we are implemented a testbed using that traffic scheduler. We perform a performance evaluation of the traffic scheduler on the testbed. As a result, we show that the hardware-based NetFPGA scheduler can provide reliable and stable QoS to virtualized networks of the Future Internet Testbed.

Study on the Mineral Admixture Replacement Ratio for Field Application of Concrete with High Volume Mineral Admixture (혼화재 다량 치환 콘크리트의 현장 적용을 위한 혼화재 치환율에 관한 연구)

  • Lee, Jae-Hyun;Kim, Yong-Ro;Park, Jong-Ho;Jeong, Yong
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.1 no.2
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    • pp.93-100
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    • 2013
  • A variety of researches on the concrete with high volume mineral admixture have increased in recent years. In fact, it is very important to find appropriate replacement ratio of concrete with high volume mineral admixture in order to apply in the field. In this study, compressive strength according to fly ash and blast furnace slag replacement ratio as well as curing temperature was measured in the conditions of obtaining the same workability in order to examine the characteristics of concrete with high volume mineral admixture. In conclusion, it was found that the compressive strength at the age of 3 days decreased by 1.4MPa and the compressive strength at the age of 28 days decreased by 3.8MPa when the fly ash replacement ratio increased by 10%. Also, it was found that the compressive strength at the age of 3 days decreased by 1.0MPa and the compressive strength at the age of 28 days decreased by 0.9MPa when the blast furnace slag replacement ratio increased by 10%. Through the tests, we obtained the basic data for developing the future research on the concrete with high volume mineral admixture for housing structure.

Chemical Remediation and Recirculation Technologies of Wastewater from Metal-Contaminated Soil Washing (금속오염(金屬汚染) 토양세척(土壤洗滌) 폐수(廢水)의 화학적(化學的) 처리(處理)와 재순환(再循環) 기술(技術))

  • Lim, Mi-Hee;Abn, Ji-Whan
    • Resources Recycling
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    • v.20 no.3
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    • pp.28-39
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    • 2011
  • This review investigated theoretical principals and practical application examples on recirculation system of soil washing-wastewater treatment-treated water recycling. As for technologies which have attempted to remediating metals-contaminated soil in and around country, there are reactive barriers, encapsulation, solidification/stabilization, soil washing, and phytoremediation. Among those, in particular, this review covers soil washing technology which physicochemically removes contaminants from soils. The major drawbacks of this technology are to generate a large amount of wastewater which contains contaminants complexed with ligands of washing solution and needs additional treatment process. To solve these problems, many chemical treatment methods have been developed as follows: precipitation/coprecipitation, membrane filtration, adsorption treatment, ion exchange, and electrokinetic treatment. In the last part of the review, recent research and field application cases on soil washing wastewater treatment and recycling were introduced. Based on these integrated technologies, it could be achieved to solve the problem of soil washing wastewater and to enhance cost effective process by reducing total water resources use in soil washing process.

Distribution Characteristics of Fish Schools in the Yellow Sea and the East China Sea in the Spring of 1997 (1997 년 춘계의 동중국해 및 황해에 대한 어군의 분포특성)

  • Lee, Dae-Jae
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.38 no.3
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    • pp.241-248
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    • 2002
  • The combined hydroacoustic and demersal trawl surveys to investigate the distribution characteristics of fish schools in the Yellow Sea and the East China Sea were carried out during the spring of 1997 by the training ship "Nagasaki Maru" of Nagasaki University. Fish samples were collected by bottom trawling from 9 trawl stations randomly selected in the survey area, and the species and length compositions of trawl catches are examined. Hydroacoustic data were collected by using a Furuno FQ-50 scientific echo sounder operating at 50KHz and the data stored in field were later processed in the laboratory. The results obtained can be summarized as follows :1. In the 9 trawl surveys conducted in the Yellow Sea and the East China Sea, 78 species including 80 species of fishes, 4 species of Cephalopoda and 6 species of Crustacea, were identified. The most abundant species in these stations were swimming crab(Portunus trituberculatus), Japanese horse mackere(Trachurus japonicus), redlip croaker(Larimichthys polyactis) and the catch per one hour in each station ranged 7.7 to 182.5 kg/hour. 2. The mean volume backscattering strength for the entire water column and the bottom layer of the 0-10 m from bottom friction were -74.6 ㏈ and -68.2 ㏈, respectively. That is, the mean volume backscattering strength for the bottom layer was 6.4 ㏈ higher than that for the entire water column 3. In the surveys during the spring of 1997, the geographical distribution characteristics of fish schools suggests a trend of decreasing fish abundance toward the coast area of Korea and the highest demersal concentrations appeared in waters between the Cheju Island and the Tsushima Island 4. The distribution density of fish school in the East China Sea and Yellow Sea during the 1997 acoustic survey were estimated to be 6.65$\times$10$^{-5}$ kg/㎥ in the entire water column and 2.86$\times$l0$^{-4}$ kg/㎥ in the bottom layer, respectively.pectively.

Reuse Technology Development and Economic Evaluation of Dyeing Wastewater Treatment Sludge (폐수처리슬러지의 재활용기술개발 및 경제성 평가 -B염색조합을 중심으로-)

  • 임재호;이정연
    • Resources Recycling
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    • v.9 no.1
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    • pp.36-43
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    • 2000
  • This study was carried out for treatment and reuse of inorganic sludge from Fenton process at B dyeing wastewater treatment plant. The parameters for pilot-scale treatment system were derived from the results of this study. It was found that $COD_{cl}$ of the treated effluent became lower than 100 mg/l approximately on the optimal reaction condition. 2nd sludge which was generated after redissolving sludge was analyzed, and it showed that reduction ratio of ash in 2nd sludge and total dry sludge weight in comparison with current sludge were 85% and 65%. Also Fe salt in sludge was redissolved about 90~95% of initial Fe by weight. It was estimated almost ₩350,000,000 for sludge reuse process. It was estimated saving of about ₩1,300,000 per day (₩420,000,000 per year) in operating cost based on 30,000 $m^3$/d treatment, which these were about ₩430,000 per day in chemical, ₩1,100,000 per day in sludge transportation and ₩200,000 per day in equipment maintenance. Payback period with interest charge for investment cost was estimated about 10.5 months. Also, net present value (NPV) was ₩792,000,000 and internal rat of return (IRR) was about 110%.

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동서 광역개발 협력체계구축 방안 - 광양만, 진주권 개발을 중심으로 -

  • Mun, Deok-Hyeong
    • Journal of Global Scholars of Marketing Science
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    • v.2
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    • pp.59-79
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    • 1998
  • 전라남도와 경상남도는 강 하나를 사이에 둔 아주 가까운 이웃이며, 주민생활권이나 지역경제권이 상로연계성을 갖고 있다. 뿐만아니라 사회, 경제 문화와 보유자원의 여러 측면에서도 상로 본완적 성격을 갖고 있는 지역이다. 따라서 대승적 차원에서 볼 때 국토의 균형박전을 도모하고 진정한 동서화합을 위해 상로연계성을 갖고 있는 광양만, 진주권 광역새발을 공동으로 추진하여 동시화합의 대전기를 마련하는 계기로 삼아야 할 것이다. 이러한 차원에서 동서지역의 광역개발 필요성을 요약하면, 첫째, 최근 일정지역의 행정구역을 넘어서 인구와 물자 및 자원의 이용이 활발하게 이러나고 있어 통합적 계획 및 집행이 요구된고 있다. 따라서 광양만 진주권개발은 2개도에 걸쳐 광역개발권역을 설정한 우리나라 최초의 시범적인 계획으로써 세계적인 관심을 보이고 있다. 둘째, 국가경쟁력을 강화하기 위한 신산업지대의 조성과 연계교통망의 구축이 요망된다. 셋째 국토균형발전을 위해 수도권에 대응한 지방거점 도시권의 육성이 팽배하며, 넷째, 중북투자를 피하고 상호보완적인 기능을 극대화하여 진정한 동서화합에 대한 시대적 여청이 증대되고 있는 시절이다. 따라서 광양만 진주권 광역개발의 기본구상은 우선 경제적 물리적통합으로 실절적인 동서이익을 보색하는 차원에서 추진되어야 한다. 그리고 광양함을 국제물류의 중심지로 확충하고 주변지역에 대규모 물류 유통 및 국제기능을 유치하여 국제적 교류거점으로서의 기반 조성을 강화 하여야 한다. 또한 국제관광벨트 및 신산업지대의 형성과 함께 세계화 고속화에 걸맞는 교통기반시설을 정비하는 한편 자연친화적인 개발전략을 이룩함으로써 지구촌 경제하에시 지역균형개발과 지역의 국제경쟁역 확보차원에서 실현되어야 한다. 나아가 과양만권과 진주권의 경제 사회적인 통합을 달성함으로써 국민적 염원인 동서화합의 장으로 승화 발전 시킬 수 있도록 공간구조 및 기능의 분담배분이 요구된다. 기능은 동시지역을 연결하는 통합적인 기능 분담으로 과양만은 생산 및 물류지원기능의 강화와 전주 사천권은 첨단산업 연구 및 지원기능의 강화차원에서 배분이 요구된다. 이러한 광역개발계획이 세계적으로 추진될 때에 진정한 동서화합은 가능할 것이다. 따라서 진정한 도서화합을 유도하기 위해서는 광역개발을 실펀하기 위한 제도적인 협력체계의 구축이 요구된다. 동서지역의 광영개발을 위한 협력체계의 구축 방안은 첫째, 양 지역간에 협약제도르 도입함으로써 광역개발의 집행력을 강화하여야 한다. 즉, 개별 개발사업별로는 협약이 체결됨으로써 자치단체간의 역활분담이 분명하고 여차별 예산의 확보는 물론 사업시행이 구체화 될 수 있기 때문이다. 둘째는 양 자치단체간의 광역행정을 진담하는 기구의 절차가 필요한다. 광역개발 계획 추진 뿐만아니라 실질적으로 양권역이 공존공영을 위해 필요한 사업들을 추진 할 수 있도록 협의회 기능을 보완한 새로운 전담기구의 설치가 필요하다. 셋째. 광양만 진주권 광역개발 계획은 동서지역의 화합이라는 상징적인 의미를 지니고 있다. 따라서 중앙정부는 동서지역간의 진정한 화합을 유도하기 위해 제주도개발 특별법과 같은 �G동서지역개발 특별법�H을 제정하여 종합적이고 체계적인 개발을 유도 하여야 한다. 지역발전을 이룩할 수 있도록 자속적인 노력이 필요하다.

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Design Program for the Regional Development (지역진흥을 위한 디자인개발 프로그램)

  • 하상오
    • Archives of design research
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    • v.15 no.1
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    • pp.379-388
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    • 2002
  • Since policies of each local government toward regional development have been focusing on only development of the individual applied items such as a character merchandise, co-regional brand, and developing a speciality for the region, the adverse effects of design have been came out. So we carried out this research to minimize the adverse effect of design and also we would like to give the opportunity of thinking of a new way to activate local economy, to create regional identity and to develop local resources by applying the Cl program which have bean used as the way of business improvement coping with the conceptional change of competitiveness with a comprehensive view. Therefore, for design to play an important role in regional development, as standing on the basis of regional development it is necessary to attain the various goals such as activating administrative organization, improving the administrative image, and making the local in go unique. And also it is necessary to develop the communicational strategy as an innovative and expressive program which can consider human network development as an regional resource. To carry out this communicational strategy effectively, in particular, it is not only inevitable to operate the strategic and comprehensive programs promoting the regional development according to the of 6 stages design develop cent program which consists of region's self-verification and self-recognition, self-determination, development of self-innovation, visibility to unify the regional images, creating the design system, and carrying out and verifying the program, but also it is necessary to apply regional development system which can change the regional basic plan, aiming at regional development, into unique regional trait that has an future image by improving the program with constant management and feedback through verifying the design program.

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A Study on the Urethane Foam Material Characteristics and Appropriate Soil Covering for Mine Reclamation Emergency Action through Atificial Fire Test (인공 화재 실험을 통한 광해방지 응급조치용 우레탄 폼 재료 특성 및 적정 복토에 관한 연구)

  • Kim, Soo Lo;Park, Jay Hyun;Lee, Jin Soo;Yang, In Jae
    • Economic and Environmental Geology
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    • v.53 no.3
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    • pp.287-296
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    • 2020
  • Mine Reclamation Project is being carried out with the aim of ensuring a sustainable green living and helping to develop eco-friendly mines by analyzing, removing and preventing the harmful factors. Mines developed during the japanese colonial period and mining boom period are still not repaired throughout the country, and from these scattered risks, public safety is worth pursuing as a top priority. The project that is close to public safety in the mine recalmation project is an emergency treatment, and the most widely used method is a filling method similar to the ground subsidence prevention. If dangerous mine cavity or tunnels are located in the mountains, charging with existing materials may not be possible, or unreasonable cases may occur, and new methods of technological development are required. Emergency actions should be carried out safely and efficiently to prevent the loss of precious people's lives on the hiking paths adjacent to dangerous mining sites. In these field conditions, urethane foam materials may be an alternative. In this study, the applicability of urethane foam materials in mining was reviewed through overseas cases. It was also tested on the appropriate depth of top soil for the protection of urethane foam materials through forest fire simulation test. The test result show that approximately 15cm of soil covering (recommended 20cm over) was suitable for maintaining the function of foam materials from forest fires.

Growing features and Vegetation at natural growth area of ristics of Acanthopanax chiisanensis and Acanthopanax koreanum (지리산오갈피와 섬오갈피의 생육특성 및 자생지 식생조사)

  • 임병선;이점숙;김하송
    • Korean Journal of Plant Resources
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    • v.12 no.2
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    • pp.125-132
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    • 1999
  • This study has investigated the growing features and vegetation of Acanthopanax chiisanensis and Acanthopanax koreanum in Mt. Jiri and Halla from Sep. 1997 to Aug. 1998. As to Acanthopanax chiisanensis, it occupied surrounding areas of Nogodan in Mt. Jiri of the height of 1,507m, ImgeolyoungJae of 1,300m and the Mt. Halla. of 1,100m of There were rather high constancy degree with Quercus mongolica, Schizandra chinensis, Hydrangen serrate for. acuminata, Acer pseudo-sieboldianum, Dryopteris crassirhizoma, Actaea asiatica, Thalictrum filamentosum, Abies koreana, Arundinella hirta from the sorts. The common species in Mt. Jiri and Halla are Acer pseudo-sieboldianum, Dryopteris crassirhizoma, Callicarpa japonica, Parthenocissus tricuspidata, Acer mono, Ligularia fischeri, Disporum smilacinum, Viola acuminata Aconitum kusnezofii. On the other hand, concerning of Acanthopanax koreanum community, it possessed the small areas of wedo weoltae village in Chejudo. In this area, a liana e.g. Dioscorea tenuipes, Hedera rhombea, Lygodium japonicum, Akebia quinata, Vitis thunbergii, Dunbaria villosa, Trachelospermum asiaticum var. intermedium, Vitis amurensis, Paederia scandens, lives with Pinux thunbergii, Celtis aurantiaca, Mallotus japonicus and so forth in tree layer and subtree layer. There is artificial change no move in the researching sites, Acanthopanax chiixanensis will be transformed into Abies koreana - Acanthopanax chiisanensis community. Soil characteristics showed the high value such as pH 6.56 and conductivity 0.258mmho/cm in Acanthopanax koreanum community of Mt. Jiri, they also indicated digit as follows: the content of organic matter and total nitrogen are from 25.16 through 25.35% and 7.58 through 9.30mg/g respectably. The soil characteristics at Acanthopanax chiisanensis community in Mt. Jiri and Halla, was high as like pH 5.76, conductivity 0.238mmho/cm, total nitrogen 9.30mg/g, total phosphorus 0.126mg/g in Mt. Halla.

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A Theoretical Review on the Planting and Management of Coastal Forests in Korea (우리나라 해안림조성과 관리의 이론적 고찰)

  • Kim, Yong-Shik;Kim, Do-Gyun
    • Korean Journal of Plant Resources
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    • v.30 no.1
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    • pp.110-123
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    • 2017
  • The authors reviewed the history of creation and management, purposes, extents, methods of creation, planting species and mediums, structure of vegetation layers and legal management, etc. of coastal forests of Korea. Since the Goryeo dynasty, the inhabitants in the coastal regions has long been aware the safety from natural disasters and the local governments manages for the defence and natural disasters, and collaboration among GO and NGOs, as well as enterprises are participating to the conservation of coastal forests in Korea. The purposes of creation and management of coastal forests in historical aspects are prevention of disasters, safety by the Fengsui, military uses, and timber productions, but partly as the places for religious beliefs, safety from diseases and fires, increasing of forest products and fishes, as well as tourists, improving of amenity and landscapes and recreation, inherits of traditional culture, habitats for wildlife, and ecological corridors, etc. The inhabitant in the coastal region who experienced frequent natural disasters has strong supports for the conservation of coastal forest and as a natural resources to inherits to the coming generations as the coastal forests has high values of academic researches on human society, culture, ecology and recreational uses, etc. The extensive overall researches on the creation and managements of coastal forests, as well as cultural tradition in the coastal forests of Korean peninsula are critically essential.