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An integrated approach to tropical and subtropical island conservation
Yamano, Hiroya,Satake, Kiyoshi,Inoue, Tomomi,Kadoya, Taku,Hayashi, Seiji,Kinjo, Koichi,Nakajima, Daisuke,Oguma, Hiroyuki,Ishiguro, Satoshi,Okagawa, Azusa,Suga, Shinsuke,Horie, Tetsuya,Nohara, Katsuhit The Ecological Society of Korea 2015 Journal of Ecology and Environment Vol.38 No.2
After the reversion of Okinawa (Ryukyu Islands) to Japan in 1972, extensive urban and agricultural development resulted in a significant increase in sediment discharge to coastal waters. The release of sediment has caused the degradation of freshwater and coastal ecosystems and biodiversity. A consideration for catchment-to-reef continua, as well as agricultural (socioeconomic) factors is necessary to establish proper land-based management plans for the conservation of the island environment. We have set up a framework to integrate biophysics and socioeconomics: 1) setting a conservation target and threshold, 2) identifying the sources and processes, and 3) examining cost-effectiveness and management priorities. The framework may be applicable to other tropical and subtropical islands with similar characteristics.
Quality Management System Proposed to JENDL Evaluation Project
N. Yamano,T. Yoshida,K. Nakajima,M. Ishikawa,K. Shibata,M. Uematsu,Y. Tahara 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
A concept of the quality management system proposed for the Japanese Evaluated Nuclear Data Library (JENDL) is described. The concept is based on the process approach established as an International Standard of a quality management system (ISO 9001). In order to discuss how to guarantee the quality of JENDL, a working group focusing on a quality assurance strategy was established in the Japanese Nuclear Data Committee. After three years of discussions, the working group published a report about a quality management system for JENDL and proposed this work to the JENDL evaluation group of the Japan Atomic Energy Agency. The concept of quality management system of JENDL consists of five items: (1) Objective, (2) Organization, (3) Scope, (4) Quality Assurance, and (5) Quality Manual. The concept of the quality management system and the documented procedure have been presented.
An integrated approach to tropical and subtropical island conservation
Hiroya Yamano,Kiyoshi Satake,Tomomi Inoue,Taku Kadoya,Seiji Hayashi,Koichi Kinjo,Daisuke Nakajima,Hiroyuki Oguma,Satoshi Ishiguro,Azusa Okagawa,Shinsuke Suga,Tetsuya Horie,Katsuhito Nohara,Naoko Fukay 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.2
After the reversion of Okinawa (Ryukyu Islands) to Japan in 1972, extensive urban and agricultural development resulted in a significant increase in sediment discharge to coastal waters. The release of sediment has caused the degradation of freshwater and coastal ecosystems and biodiversity. A consideration for catchment-to-reef continua, as well as agricul¬tural (socioeconomic) factors is necessary to establish proper land-based management plans for the conservation of the island environment. We have set up a framework to integrate biophysics and socioeconomics: 1) setting a conservation target and threshold, 2) identifying the sources and processes, and 3) examining cost-effectiveness and management pri¬orities. The framework may be applicable to other tropical and subtropical islands with similar characteristics.
CHARACTERISTICS OF SELF-LEVELING BEHAVIOR OF DEBRIS BEDS IN A SERIES OF EXPERIMENTS
Cheng, Songbai,Yamano, Hidemasa,Suzuki, TYohru,Tobita, Yoshiharu,Nakamura, Yuya,Zhang, Bin,Matsumoto, Tatsuya,Morita, Koji Korean Nuclear Society 2013 Nuclear Engineering and Technology Vol.45 No.3
During a hypothetical core-disruptive accident (CDA) in a sodium-cooled fast reactor (SFR), degraded core materials can form roughly conically-shaped debris beds over the core-support structure and/or in the lower inlet plenum of the reactor vessel from rapid quenching and fragmentation of the core material pool. However, coolant boiling may ultimately lead to leveling of the debris bed, which is crucial to the relocation of the molten core and heat-removal capability of the debris bed. To clarify the mechanisms underlying this self-leveling behavior, a large number of experiments were performed within a variety of conditions in recent years, under the constructive collaboration between the Japan Atomic Energy Agency (JAEA) and Kyushu University (Japan). The present contribution synthesizes and gives detailed comparative analyses of those experiments. Effects of various experimental parameters that may have potential influence on the leveling process, such as boiling mode, particle size, particle density, particle shape, bubbling rate, water depth and column geometry, were investigated, thus giving a large palette of favorable data for the better understanding of CDAs, and improved verifications of computer models developed in advanced fast reactor safety analysis codes.