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Characteristics of second harmonic ECCD on CHS
yasuo Yoshimura,H. Matsushita,H. Igami,K. Nagasaki,K. Matsuoka,K. Ohkubo,K. Nagaoka,M. Isobe,S. Kobayashi,S. Okamura,S. Kubo,S. Nishimura,T. Minami,T. Akiyama,T. Notake,T. Shimozuma,A. Shimizu,C. Suzu 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
Second harmonic electron cyclotron current drive (ECCD) has been investigated on CHS (Compact Helical System) by using a 2-D steerable EC-beam injection system. The direction of the plasma current, which is the sum of bootstrap current and EC-driven current, is clearly reversed by a reversal of the EC-beam injection direction. The direction of driven current is consistent with expectation in the case of low-field side injection of EC wave. So far, a driven current up to 6 kA has been obtained when bootstrap current is less than 2 kA. It is confirmed that right-hand polarization and low density are effective for ECCD.
Japanese Kana-to-Kanji Conversion using Large Scale Collocation Data
( Yasuo Koyama ),( Masako Yasutake ),( Kenji Yoshimura ),( Kosho Shudo ) 한국언어정보학회 1998 국제 워크샵 Vol.1998 No.-
Japanese word processor or the computer used in Japen employs Japanese input method through keyboard stroke combined with Kona (phonetic) character to Kanji (ideographc, Chinese) character conversion technology. The key foctor of Kana-to-Kanji conversion technology is how to raise the accuracy of the conversion through the home-phone processing, since we have so many homophones. In this paper, we repart the results of our Kana-to-Kanji conversion experiments which embody homophone processing using extensive collocation data. It is shown that appraximately 135,000 collocation data yields 9.1% raise of the conversion accuracy compared with the prototype system which has no collocation data.
Design standard for fairway in next generation
Kohei OHTSU,Yasuo YOSHIMURA,Masayoshi HIRANO,Hironao TAKAHASHI,Masanori TSUGANE 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.2006 No.-
The depth, width and alignment of fairway that are main port water facilities should be designed considering the various elements including particulars of design ships, weather and sea conditions around fairway and method of ship-handling. However not only the existing Japanese design standard for fairway and also those of other countries do not take into consideration of such kind of elements and no design standard is made by quantitative analysis. In this circumstance the new design standard [Approach Channels, A Guide for Design] depending on classified various elements and quantitative analysis was proposed in 1997 by PIANC and IAPH. But it was proved that calculated values according to this standard were unfounded and had some problems to output the discontinuous value by small difference of calculation condition because the each value for each element was simply added. And also it is hard to apply this standard to the design of port water facilities in Japan because this [A Guide for Design] is the design standard for long channels in European port. The proposal of more reasonable Japanese standard will be expected by applying the study result of naval architecture and navigation and by the cooperation of ship operators to use fairway, naval architects to built ships and civil engineers to dredge fairway. The concept of a fairway in “Design standard for fairway in next generation" is defined as passage (or approach channel) and traffic lane designated by light buoys as navigable water for safe navigation. In “Design standard for fairway in next generation" depth, width and alignment are picked up among many design elements of a fairway. Design method for those elements is shown based on design ships and navigational environments. This standard shows the method of design for each dimension depending on characteristic on design ship and weather and sea condition. On the other hand, in case of existing fairway, it is possible to decide the size of ship and navigation criteria by opposite analysis.