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h Ninomiya,T. Imai,T. Fujii,T. Suzuki,T. Fujita,T. Yamamoto,Y. Uesugi,Y. Kamada,Y. Takase,Y. Kudo,Y. Miura,Y. Ikeda,Y. M. Miura,A. Shimizu,A. Kimura,A. Morioka,A. Nishimura,A. Sagara,G. Kurita,H. Kubo 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The NCT Program, in which the present JT-60U is being modified into a superconducting coil machine, is discussed under nationwide collaboration in Japan. Its mission is to establish high-beta steady-state operation for DEMO and to contribute to ITER. NCT is designed to have potential to investigate such research.
Recent progress in Large Helical Device experiments
Akio Komori,T. Shimozuma,T. Ido,T. Kobuchi,T. Seki,T. Ozaki,T. Fujita,T. Watari,T. Akiyama,T. Tokuzawa,T. Uda,T. Minami,Y. Nakamura,Y. Torii,Y. Sakamoto,Y. Takeiri,Y. Nagayama,Y. Oka,Y. Narushima,Y. Y 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
In the Large Helical Device (LHD), some reactor-oriented experiments, i.e. high beta, high ion temperature, steady state operation, have produced remarkable progress in recent experimental campaigns. By optimizing the rotational transform, an average beta value of 4.3 %, which is the highest on record for helical devices, was achieved. The ICRF sustained steady-state discharges for more than 30 minutes, these were also successfully performed with the aid of the magnetic axis swing technique for the reduction of the heat load to the plasma-facing component. In the discharge, the total input energy to the plasma reached 1.3 GJ, which also established a new record.1
Mihara, Y.,Maruyama, Y.,Okada, Y.,Kido, H.,Nishida, O.,Fujita, H.,Ito, M. The Korean Society of Marine Engineering 2004 한국마린엔지니어링학회지 Vol.28 No.2
A marine diesel engine should realize optimal efficiency operation while reducing NOx. Fuel injection systems by electronic control can become effective means for that. Although it would be able to get more precise engine control compared to the mechanical injection system, it needs some accurate and instant information in order to bring its ability into full play while sailing on the sea. Very important information of them is shaft torque and continuous combustion pressure of all cylinders. The system presented in this report can deliver those data.
EFFECT OF HOT SEASON ON LIVE SPERMATOZOA WITH INTACT ACROSOME IN HOLSTEIN BULLS
Terawaki, Y.,Fujita, H.,Fukui, Y. Asian Australasian Association of Animal Productio 1995 Animal Bioscience Vol.8 No.5
Semen characteristics were examined to find the deterioration of the percentage of live spermatozoa with intact acrosome during hot season using 5 Holstein bulls located in Shirnizu-cho Hokkaido Japan. Spermatozoal viability and acrosomal status were observed simultaneously with triple-stain technique for each spermatozoon. Spermatozoa were divided in four categories (live spermatozoa with intact acrosome, live spermatozoa without intact acrosome, dead spermatozoa with intact acrosome and dead spermatozoa without intact acrosome). Bull and collection month had significant effects on semen characteristics (p < 0.01). The percentage of live spermatozoa with intact acrosome and the percentage of live spermatozoa had the lowest least squares mean by collection month in August (72.7% and 76.7%). These two characteristics indicated the obvious deterioration during hot season. But the fluctuation of these two characteristics were not parallel and the differences between the two characteristics were largest during July to September. The present results indicate the necessity for the simultaneous determination of viability and acrosomal status of each Holstein bull's spermatozoa in order to keep fertility above an acceptable minimum level during hot season.
Linear Polarization Measurement of Gamma Rays in 155Gd by Using a Segmented Compton Polarimeter
J.H.Lee,S.Tanaka,T.Shinozuka,M.Fujita,A.Yamazaki,T.Sonoda,Y.K.Kim,J.S.Chai,C.S.Lee,J.Y.Huh,J.Y.Moon,Y.K.Kwon,Y.Gono,T.Fukuchi 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.40 No.5
A linear polarization measurement for gamma rays has been performed to directly determine the parities for the levels in 155Gd. High-spin states in 155Gd were populated in the 154Sm(,3n )155Gd reaction by using 35-MeV alphas. Linearly polarized gamma rays emitted from oriented states were measured by using a Compton polarimeter which is made of a planar-type germanium crystal and is segmented into 25 cathodes. The linear polarization of the gamma rays was measured by selecting Compton-scattered events red in coincidence between two adjacent cathodes. The sign of the measured linear polarization enabled us to distinguish between electric and magnetic types of gamma-ray transitions. Accordingly, the parities of the high-spin states in 155Gd were directly determined. Our parity assignment is in excellent agreement with a previous one. A linear polarization measurement for gamma rays has been performed to directly determine the parities for the levels in 155Gd. High-spin states in 155Gd were populated in the 154Sm(,3n )155Gd reaction by using 35-MeV alphas. Linearly polarized gamma rays emitted from oriented states were measured by using a Compton polarimeter which is made of a planar-type germanium crystal and is segmented into 25 cathodes. The linear polarization of the gamma rays was measured by selecting Compton-scattered events red in coincidence between two adjacent cathodes. The sign of the measured linear polarization enabled us to distinguish between electric and magnetic types of gamma-ray transitions. Accordingly, the parities of the high-spin states in 155Gd were directly determined. Our parity assignment is in excellent agreement with a previous one.