Search

Your search keyword '"Sudo, S."' showing total 1,221 results
Start Over Author "Sudo, S."
1,221 results on '"Sudo, S."'

3. Semianalytical treatment of current density of particles injected by a monoenergetic source

Author

Goncharov, P. R., Kuteev, B. V., Sergeev, V. Yu., Ozaki, T., and Sudo, S.

Subjects
Physics - Plasma Physics
Abstract

This paper extends the semianalytical treatment of fast ion current density to take into account time dependence and velocity diffusion using solutions of Boltzmann equation with a complete Coulomb collision term (Goncharov et al. 2010 Phys. Plasmas 17 112313). An arbitrary angle distribution of the fast ion source is assumed. The results are applicable to multi-ion-species plasma. Since analytical results provide an extra physical insight and constitute a reliable basis for verification of numerical codes, it is desirable to obtain exact solutions where possible. New results clarify the discrepancies between analytical formulae in earlier bibliography and improve the physical basis of neutral beam injection current drive., Comment: 10 pages, 2 figures, 1 table

Published
2010
Full Text
View/download PDF

7. Image-Guided Proton Therapy for Unresectable Trunk Soft-Tissue Sarcoma.

Author

Nakajima, K., Sudo, S., Ogino, H., Yokoyama, Y., Sunagawa, M., Iwata, H., Hattori, Y., Nomura, K., Tsuzuki, Y., Hayashi, K., Toshito, T., and Hiwatashi, A.

Subjects
*DOSE fractionation, *BUTTOCKS, *PROTON therapy, *OVERALL survival, TUMOR surgery
Abstract

Surgical resection is the standard treatment for soft-tissue sarcomas (STS). However, trunk STS is often unresectable due to its large size and proximity to vital structures. There is limited evidence regarding proton therapy (PT) for trunk STS with definitive intent. We hypothesize that image-guided PT (IGPT) will provide long-term local control and improve survival for patients with unresectable trunk STS. A single institutional retrospective study was conducted on patients who underwent IGPT with definitive intent for unresectable trunk STS from December 2013 to September 2022. In this study, the "trunk" was defined as regions excluding the extremities and head and neck areas. Patients under 18 years old and those with gynecological sarcomas were excluded. PT treatment employed either the passive scattering technique or spot scanning technique. Overall survival (OS), local control (LC), and progression-free survival (PFS) were analyzed using Kaplan-Meier estimates, and radiation-related adverse events were assessed using CTCAE version 5.0. Univariate analysis (UVA) was conducted to assess the association with OS. Thirty-three patients were analyzed. The median age was 61 years (range = 19-85), and the median gross tumor volume (GTV) was 266 cc (range = 10-3017). The most common histological type was dedifferentiated liposarcoma (n = 14; 42%), followed by leiomyosarcoma (n = 6; 18%). The most frequent irradiation site was the retroperitoneum (n = 22; 67%), followed by the gluteal region (n = 5; 15%). The dose fractionation ranged from 57.2 to 70.2 Gy (RBE) in 13 to 33 fractions, with the most common being 70.2 Gy (RBE) in 26 fractions (n = 19; 58%). Spot scanning technique was used in 26 patients (79%). The target was the primary tumor with no prior surgery in 16 patients (48%) and recurrent or metastatic tumor after surgery in 17 patients (52%). Two patients (6%) had previous radiotherapy. Seven patients (21%) had surgical absorbable spacer placement. The median follow-up duration was 21 months (range = 3-106). The 3-year OS, LC, and PFS were 53% (95% CI = 31-70%), 81% (60-92%), and 39% (23-55%), respectively. The most common initial recurrence pattern was distant metastasis. In UVA, GTV exceeding 300cc was identified as a poor prognostic factor for OS. No grade 3 or higher radiation-related adverse events were observed. This study explored the effectiveness of IGPT for unresectable trunk STS, particularly retroperitoneal sarcomas. IGPT demonstrated favorable LC, showing promise as a safe and effective treatment for this challenging condition. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

10. Spatial Distribution Measurement of High Energy Particle using Time-Of-Flight Neutral Particle Energy Analyzer in Large Helical Device

Author

G1/G2 Group, Ozaki, T., Goncharov, P., Murakami, S., Sudo, S., Shoji, M., Emoto, M., Funaba, H., Goto, M., Ida, K., Idei, H., Ikeda, K., Kanko, O., Kawahata, K., Kobuchi, T., Kubo, S., Kumazawa, R., Morita, S., Motojima, O., Muto, S., Mutoh, T., Nagayama, Y., Nakamura, Y., Nakanishi, H., Narihara, K., Noda, N., Ohdachi, S., Ohyabu, N., Oka, Y., Osakabe, M., Peterson, B., Saito, K., Sakakibara, S., Sasao, M., Sato, K., Seki, T., Shimozuma, T., Takeiri, Y., Tanaka, K., Torii, H., Tsumori, K., Watanabe, T., Watari, T., Zanza, V., Bracco, G., Sibio, A., Tilia, B., Stott, Peter E., editor, Wootton, Alan, editor, Gorini, Giuseppe, editor, Sindoni, Elio, editor, and Batani, Dimitri, editor

Published
2002
Full Text
View/download PDF

15. Overview of transport and MHD stability study: focusing on the impact of magnetic field topology in the Large Helical Device

Author

Ida, K., Nagaoka, K., Inagaki, S., Kasahara, H., EVANS5, Todd, Yoshinuma, M., Kamiya, K., Ohdachi, S., Osakabe, M., Kobayashi, M., Sudo, S., Itoh, K., Akiyama, T., Emoto, M., DINKLAGE, Andreas, Du, X., Fujii, K., Goto, M., GOTO, Takuya, HASUO, Masahiro, Hidalgo, C., Ichiguchi, K., Ishizawa, A., JAKUBOWSKI, Marcin, KAWAMURA, Gakushi, Kato, D., Morita, S., Mukai, Kiyofumi, Murakami, I., Murakami, S., Narushima, Y., Nunami, M., OHNO, Noriyasu, Pablant, N., Sakakibara, S., Seki, T., Shimozuma, T., SHOJI, M., Tanaka, K., Tokuzawa, T., Todo, Y., Wang, H., Collaborators, Ida, K., Nagaoka, K., Inagaki, S., Kasahara, H., EVANS5, Todd, Yoshinuma, M., Kamiya, K., Ohdachi, S., Osakabe, M., Kobayashi, M., Sudo, S., Itoh, K., Akiyama, T., Emoto, M., DINKLAGE, Andreas, Du, X., Fujii, K., Goto, M., GOTO, Takuya, HASUO, Masahiro, Hidalgo, C., Ichiguchi, K., Ishizawa, A., JAKUBOWSKI, Marcin, KAWAMURA, Gakushi, Kato, D., Morita, S., Mukai, Kiyofumi, Murakami, I., Murakami, S., Narushima, Y., Nunami, M., OHNO, Noriyasu, Pablant, N., Sakakibara, S., Seki, T., Shimozuma, T., SHOJI, M., Tanaka, K., Tokuzawa, T., Todo, Y., Wang, H., and Collaborators

Abstract

The progress in the understanding of the physics and the concurrent parameter extension in the large helical device since the last IAEA-FEC, in 2012 (Kaneko O et al 2013 Nucl. Fusion 53 095024), is reviewed. Plasma with high ion and electron temperatures (Ti(0) ~ Te(0) ~ 6 keV) with simultaneous ion and electron internal transport barriers is obtained by controlling recycling and heating deposition. A sign flip of the nondiffusive term of impurity/momentum transport (residual stress and convection flow) is observed, which is associated with the formation of a transport barrier. The impact of the topology of three-dimensional magnetic fields (stochastic magnetic fields and magnetic islands) on heat momentum, particle/impurity transport and magnetohydrodynamic stability is also discussed. In the steady state operation, a 48 min discharge with a line-averaged electron density of 1 × 1019 m−3 and with high electron and ion temperatures (Ti(0) ~ Te(0) ~ 2 keV), resulting in 3.36 GJ of input energy, is achieved., source:K. Ida et al 2015 Nucl. Fusion 55 104018, source:https://doi.org/10.1088/0029-5515/55/10/104018, identifier:0000-0002-0585-4561

Published
2021

16. Control, data acquisition, data analysis and remote participation in LHD

Author

Nagayama, Y., Emoto, M., Nakanishi, H., Sudo, S., Imazu, S., Inagaki, S., Iwata, C., Kojima, M., Nonomura, M., Ohsuna, M., Tsuda, K., Yoshida, M., Chikaraishi, H., Funaba, H., Horiuchi, R., Ishiguro, S., Ito, Y., Kubo, S., Mase, A., Mito, T., Miyazawa, J., Mutoh, T., Nakamura, Y., Saito, K., Sakamoto, R., Seki, T., Shoji, M., Takami, S., Watanabe, T., Yamamoto, T., Komori, A., and Motojima, O.

Published
2008
Full Text
View/download PDF

22. Broadband dielectric study of dynamics of poly(vinyl pyrrolidone)--Ethylene glycol oligomer blends

Author

Shinyashiki, N., Sengwa, R.J., Tsubotani, S., Nakamura, H., Sudo, S., and Yagihara, S.

Subjects
Vinyl polymers -- Electric properties, Ethylene glycol -- Electric properties, Relaxation phenomena -- Research, Chemicals, plastics and rubber industries
Abstract

The broadband dielectric behavior of the ethylene glycol oligomer (EGO) blend, with a concentration variation, to the dynamics of the ethylene glycol oligomer of the different repeat units, and the segmental motion of poly (vinyl pyrrolidone) (PVP) is investigated. The relaxation time of the local chain motion of PVP showed a strong PVP concentration dependence and solvent viscosity dependence.

Published
2006

30. Conceptual design activities and key issues on LHD-type reactor FFHR

Author

Sagara, A., Mitarai, O., Imagawa, S., Morisaki, T., Tanaka, T., Mizuguchi, N., Dolan, T., Miyazawa, J., Takahata, K., Chikaraishi, H., Yamada, S., Seo, K., Sakamoto, R., Masuzaki, S., Muroga, T., Yamada, H., Fukada, S., Hashizume, H., Yamazaki, K., Mito, T., Kaneko, O., Mutoh, T., Ohyabu, N., Noda, N., Komori, A., Sudo, S., and Motojima, O.

Published
2006
Full Text
View/download PDF

36. Large Helical Device (LHD) program

Author

Fujiwara, M., Yamazaki, K., Okamoto, M., Todoroki, J., Amano, T., Watanabe, T., Hayashi, T., Sanuki, H., Nakajima, N., Itoh, K., Sugama, H., Ichiguchi, K., Murakami, S., Motojima, O., Yamamoto, J., Satow, T., Yanagi, N., Imagawa, S., Takahata, K., Tamura, H., Nishimura, A., Komori, A., Inoue, N., Noda, N., Sagara, A., Kubota, Y., Akaishi, N., Satoh, S., Tanahashi, S., Chikaraishi, H., Mito, T., Yamada, S., Yamaguchi, S., Sudo, S., Sato, K. N., Watari, T., Kuroda, T., Kaneko, O., Ohkubo, K., Kitagawa, S., Ando, A., Idei, H., Tsumori, K., Kubo, S., Kumazawa, R., Mutoh, T., Oka, Y., Sato, M., Seki, T., Shimozuma, T., Takeiri, Y., Hamada, Y., Narihara, K., Kawahata, K., Fujisawa, S., Hidekuma, S., Minami, T., Yamada, I., Ejiri, A., Tanaka, K., Sasao, M., Iguchi, H., Watanabe, K. Y., Yamada, H., Ohyabu, N., Suzuki, H., and Iiyoshi, A.

Published
1996
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results