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Ota, Yutaka,Taniguchi, Haruhito,Nakajima, Tatsuhito,Liyanage, Kithsiri M.,Shimizu, Koichiro,Masuta, Taisuke,Baba, Jumpei,Yokoyama, Akihiko The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.2
This paper propose an autonomous distributed vehicle-to-grid control scheme of grid-connected (plug-in hybrid) electric vehicle. Grid-friendly charge and discharge maintaining user convenience for plug-out and battery state-of-charge is realized based on frequency measurement at the plug-in terminal. Implementing proposed scheme to automotive power electronics circuit, (plug-in hybrid) electric vehicle works as a smart storage which is an alternative to stationary battery. The smart storage is expected to be a spinning reserve because of its high-speed response without information exchange to a central load dispatch center. An effect of the autonomous distributed vehicle-to-grid and cooperation with centralized speed governor control and load frequency control of conventional thermal power generator is evaluated.
Kim, M.-S.,Klopfenstein, N. B.,Ota, Y.,Lee, S. K.,Woo, K.-S.,Kaneko, S. Blackwell Publishing Ltd 2010 Forest pathology Vol.40 No.3
<P>Summary</P><P>This article briefly reviews the history of white pine blister rust, attributed to <I>Cronartium ribicola</I>, and addresses current research and management issues in South Korea, Japan and other regions of eastern Asia (China, Russia and Himalaya). For each region, the distribution, damage, aecial hosts, telial hosts and management of <I>C. ribicola</I> and other blister rust fungi on native and introduced white pines are summarized. In addition, blister rust behaviours in eastern Asia and North America are compared; and the potential evolutionary and management implications are discussed.</P>
Performance Analysis of Ubiquitous Power Systems under Coordinated Control of System Elements
Liyanage, Kithsiri M.,Masuta, Taisuke,Shimizu, Koichiro,Kihara, Hiroyuki,Yokoyama, Akihiko,Ota, Yutaka,Nakajima, Tatsuhito,Taniguchi, Haruhito The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
The trend of integrating renewable energy sources into power networks is becoming common in practice, making power systems to be more ubiquitous in nature. The connection of renewable sources in large numbers at distribution level could cause adverse power fluctuations. By employing battery energy storage systems, these fluctuations can be reduced. However economic constraints imposed by high battery cost may not justify liberal use of battery storage to control power fluctuations. The authors have previously shown the possibility of reducing battery energy storage systems' capacity without degrading the performance in terms of energy capturing efficiency and arresting power fluctuations of a ubiquitous power network through coordinated control of elements. Meantime there are attempts to make use the battery energy storage available in electric vehicles to provide a cushion against power and frequency fluctuations caused by renewable generation. In this paper authors presents a comparison between the effectiveness of conventional battery energy storage system and that of battery energy storage available in electric vehicles to improve the performance of ubiquitous power network under coordinated control. This study has shown that energy storage from electric vehicles can outperform conventional battery energy storage systems of similar capacity range under certain conditions.
수도에 대한 Ethylene의 생리작용에 관한 연구 제4보 질소반응과 Ethylene생성의 품종간 차이
이문희,이종훈,태전보부,Lee, M.H.,Lee, J.H.,Ota, Yasuo 한국작물학회 1983 한국작물학회지 Vol.28 No.1
Rice plant was tested in the phytotron to know the varietal difference of ethylene production in different nitrogen levels. The high nitrogen concentrated varieties among tested varieties produced a large amount of ethylene. But high nitrogen concentrated leaf in the one variety produced less amount of ethylene. The varieties which produced a large amount of ethylene was remarkably increased ethylene in no nitrogen plot$(N_0)$ compare to standard level$(N_1)$. In contrast low ethylene producing varieties was remarkably decreased in double nitrogen level$(N_2)$.