著者

Toshikazu Shibata Takuya Sano Keiji Yano Kazuhiro Fujikawa Shuji Hayashi Katsuya Yamanishi Akira Inoue Kunihiko Tada Takatoshi Matsumoto Eiichi Sasano

出版者

Japan Council for Renewable Energy

雑誌

グランド再生可能エネルギー国際会議論文集 (ISSN:24340871)

巻号頁・発行日

pp.283, 2018 (Released:2019-03-07)

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The 60MWh vanadium flow battery system was installed in Minami-Hayakita substation of Hokkaido Electric Power Co., Inc. (HEPCO), and started operation December 2015, to demonstrate application of the storage battery as a dispatchable power source like fire plants and hydro plants. In commissioning tests, initial characteristics of the flow battery system, such as energy capacity, system efficiency, and response time, are confirmed. These results satisfied the specification of the system. This system has been operated to demonstrate various types of control modes such as load frequency control, compensation for wind power and PV output fluctuation, control for countermeasure against over generation, and so on. In periodic evaluation, it is confirmed that there is no deterioration of energy capacity and system efficiency, which are main performance parameters, for these 2 years of operation.

著者

Kazuhide KIMBARA Toshiyuki HASHIMOTO Masao FUKUDA Takao KOANA Masamichi TAKAGI Michio OISHI Keiji YANO

出版者

Japan Society for Bioscience, Biotechnology, and Agrochemistry

雑誌

Agricultural and Biological Chemistry (ISSN:00021369)

巻号頁・発行日

vol.52, no.11, pp.2885-2891, 1988 (Released:2006-04-05)

参考文献数

27

被引用文献数

19

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A mixed culture composed of two Pseudomonas strains, designated as KKL101 and KKS102, was isolated from soil. This mixed culture had an enhanced ability to degrade various polychlorinated biphenyls (PCBs) which include highly chlorinated components. They did not grow individually on the mineral salts medium supplemented with a highly chlorinated PCB (PCB48, a mixture of mainly tetrachlorobipheny1) and biphenyl. When the spent medium of KKL101 was added to the washed cell preparation of KKS102, however, the latter grew on these carbon sources, producing yellow compounds which were identified as metabolic intermediates of the carbon sources, biphenyl and PCBs. These results suggest that KKL101 produces a growth factor(s) essential for KKS102 to grow on PCBs and that the growth of KKL101 is supported by the metabolic intermediates produced by KKS102. It appears that these two bacterial strains have a symbiotic relationship. From the analysis of the degradation products of various PCB congeners, it was found that strain KKS102 degrades a wide range of PCBs which have been considered to be refractory to biological degradation.

著者

Keiji YANO Tomoki NAKAYA Yoshitaka ISHIKAWA

出版者

The Association of Japanese Geographers

雑誌

Geographical review of Japan, Series B (ISSN:02896001)

巻号頁・発行日

vol.73, no.2, pp.165-177, 2000-12-01 (Released:2008-12-25)

参考文献数

21

被引用文献数

6 9

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The purpose of this paper is to carefully examine the spatial pattern of human migration during the second half of the 1980s, by using geographical information system (GIS) and spatial interaction models (SIMs). It should be noted that this paper is based on the full data set of the inter-municipal migration extracted from the 1990 population census of Japan. This paper firstly uses GIS to provide the features of the Japanese migration system based on municipality units. As a result, the two major migration patterns in the late 1980s are observed; influx of population to the Keihin metropolitan area from non-metropolitan areas, and to prefectural capital cities from other cities of the same prefecture. Next, Fotheringham's competing destinations models are also applied to the inter-municipal migration flows. It is found that the spatial distribution of accessibility parameter estimates has a significantly contrastive pattern: the estimates of the origins in the non-metropolitan areas are positive and show the agglomeration effect in migration process, while the ones in the metropolitan areas are negative and show the competing effect. These results suggest that accessibility parameter estimates reflect not only the spatial configuration of origins and destinations, but also the preference of migrants for the large metropolitan areas reflecting the Japanese core-periphery structure and the business cycle in the boom period of the late 1980s.

著者

Juichi CHITOSE Kei-ichi OKUNUKI Koji OHNISHI Atsushi SUZUKI Hitoshi HASEGAWA Teruko USUI Takamasa SAKAI Keiji YANO Tomoki NAKAYA Satoshi IWAKIRI Hiroyuki KOHSAKA Tomoko SEKINE

出版者

The Association of Japanese Geographers

雑誌

地理学評論 (ISSN:13479555)

巻号頁・発行日

vol.75, no.12, pp.772-774, 2002-10-01 (Released:2008-12-25)