Search

Your search keyword '"Yoshida, Koichi"' showing total 904 results
Start Over Author "Yoshida, Koichi"
904 results on '"Yoshida, Koichi"'

1. Xenon-gas ionization chamber to improve particle identification of heavy ion beams with Z>70

Author

Yoshimoto, Masahiro, Fukuda, Naoki, Matsumura, Riku, Nishimura, Daiki, Otsu, Hideaki, Shimizu, Yohei, Sumikama, Toshiyuki, Suzuki, Hiroshi, Takahashi, Hiroyuki, Takeda, Hiroyuki, Tanaka, Junki, and Yoshida, Koichi

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

In conventional ionization chambers (ICs) using P-10 (Ar+CH4) gas, as the atomic number (Z) of the ion beams increases in the energy region of 200-300 MeV/u, the Z resolution deteriorates rapidly when Z>70. This degradation is attributed to substantial energy loss straggling caused by charge state fluctuation when the beams traverse a gas medium. The energy loss straggling increases when the beams cannot attain charge state equilibrium in the IC gas. In this study, a xenon-based gas (Xe+CH4), exhibiting a sufficiently large charge state changing cross section, was used in the IC to reach charge state equilibrium. The responses of ICs with P-10 and the xenon-based gases were examined using 238U beams and cocktail radioactive isotope (RI) beams with Z=40-90 at the RI Beam Factory (RIBF). For 238U beams at 165-344 MeV/u, the P-10 gas IC yielded an energy resolution of 1.9-3.0% in full width at half maximum (FWHM), which proved inadequate for Z identification in the uranium region. In contrast, the xenon-based gas IC demonstrated a satisfactory energy resolution of 1.4-1.6%. When using cocktail RI beams, a Z resolution of 1.28 and 0.74 was achieved by the P-10 and the xenon-based gas ICs, respectively, for beams with Z=84-88 at 200 MeV/u. The contrast in Z resolutions between the P-10 and the xenon-based gas ICs was effectively elucidated by the energy loss straggling model, incorporating collisional straggling and straggling due to charge state changes in the IC gases. The xenon-based gas IC, with more than 3sigma Z separation across a broad Z range (Z=40-90), emerged as a practical solution for Z identification of heavy ion beams., Comment: 24 pages, 13 figures, 1 table

Published
2024

3. Chiral symmetry restoration at high matter density observed in pionic atoms

Author

Nishi, Takahiro, Itahashi, Kenta, Ahn, DeukSoon, Berg, Georg P. A., Dozono, Masanori, Etoh, Daijiro, Fujioka, Hiroyuki, Fukuda, Naoki, Fukunishi, Nobuhisa, Geissel, Hans, Haettner, Emma, Hashimoto, Tadashi, Hayano, Ryugo S., Hirenzaki, Satoru, Horii, Hiroshi, Ikeno, Natsumi, Inabe, Naoto, Iwasaki, Masahiko, Kameda, Daisuke, Kisamori, Keichi, Kiyokawa, Yu, Kubo, Toshiyuki, Kusaka, Kensuke, Matsushita, Masafumi, Michimasa, Shin'ichiro, Mishima, Go, Miya, Hiroyuki, Murai, Daichi, Nagahiro, Hideko, Niikura, Megumi, Nose-Togawa, Naoko, Ota, Shinsuke, Sakamoto, Naruhiko, Sekiguchi, Kimiko, Shiokawa, Yuta, Suzuki, Hiroshi, Suzuki, Ken, Takaki, Motonobu, Takeda, Hiroyuki, Tanaka, Yoshiki K., Uesaka, Tomohiro, Wada, Yasumori, Watanabe, Atomu, Watanabe, Yuni N., Weick, Helmut, Yamakami, Hiroki, Yanagisawa, Yoshiyuki, and Yoshida, Koichi

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

Modern theories of physics tell that the vacuum is not an empty space. Hidden in the vacuum is a structure of anti-quarks $\bar{q}$ and quarks $q$. The $\bar{q}$ and $q$ pair has the same quantum number as the vacuum and condensates in it since the strong interaction of the quantum chromodynamics (QCD) is too strong to leave it empty. The $\bar{q}q$ condensation breaks the chiral symmetry of the vacuum. The expectation value $<\bar{q}q>$ is an order parameter. For higher temperature or higher matter-density, $|<\bar{q}q>|$ decreases reflecting the restoration of the symmetry. In contrast to these clear-cut arguments, experimental evidence is so far limited. First of all, the $\bar{q}q$ is nothing but the vacuum itself. It is neither visible nor perceptible. In this article, we unravel this invisible existence by high precision measurement of pionic atoms, $\pi^-$-meson-nucleus bound systems. Using the $\pi^-$ as a probe, we demonstrate that $|<\bar{q}q>|$ is reduced in the nucleus at 58% of the normal nuclear density by a factor of 77 $\pm$ 2% compared with that in the vacuum. This reduction indicates that the chiral symmetry is partially restored due to the extremely high density of the nucleus. The present experimental result clearly exhibits the existence of the hidden structure, the chiral condensate, in the vacuum.

Published
2022
Full Text
View/download PDF

6. Chiral symmetry restoration at high matter density observed in pionic atoms

Author

Nishi, Takahiro, Itahashi, Kenta, Ahn, DeukSoon, Berg, Georg P. A., Dozono, Masanori, Etoh, Daijiro, Fujioka, Hiroyuki, Fukuda, Naoki, Fukunishi, Nobuhisa, Geissel, Hans, Haettner, Emma, Hashimoto, Tadashi, Hayano, Ryugo S., Hirenzaki, Satoru, Horii, Hiroshi, Ikeno, Natsumi, Inabe, Naoto, Iwasaki, Masahiko, Kameda, Daisuke, Kisamori, Keichi, Kiyokawa, Yu, Kubo, Toshiyuki, Kusaka, Kensuke, Matsushita, Masafumi, Michimasa, Shin’ichiro, Mishima, Go, Miya, Hiroyuki, Murai, Daichi, Nagahiro, Hideko, Niikura, Megumi, Nose-Togawa, Naoko, Ota, Shinsuke, Sakamoto, Naruhiko, Sekiguchi, Kimiko, Shiokawa, Yuta, Suzuki, Hiroshi, Suzuki, Ken, Takaki, Motonobu, Takeda, Hiroyuki, Tanaka, Yoshiki K., Uesaka, Tomohiro, Wada, Yasumori, Watanabe, Atomu, Watanabe, Yuni N., Weick, Helmut, Yamakami, Hiroki, Yanagisawa, Yoshiyuki, and Yoshida, Koichi

Published
2023
Full Text
View/download PDF

10. Executive summary: Japanese pediatric guideline for the treatment and management of asthma (JPGL) 2020

Author

Committee members, Adachi, Yuichi, Takizawa, Takumi, Futamura, Masaki, Fujisawa, Takao, Yoshihara, Shigemi, Shimojo, Naoki, Iino, Akira, Ebisawa, Mothiro, Mochizuki, Hiroyuki, Ohya, Yukihiro, Katsunuma, Toshio, Kameda, Makoto, Inoue, Toshishige, Fukuie, Tatsuki, External committee members, Iwanaga, Takashi, Kuriyama, Mariko, Kuroki, Haruo, Sonobe, Mariko, Takase, Masato, Masuko, Ikuyo, Collaborators, Yamaide, Fumiya, Yoshida, Koichi, Nagakura, Kenichi, Hirai, Kota, Miyaji, Yumiko, Ito, Yasunori, Yagi, Hisako, Miura, Katsushi, Horino, Satoshi, Fukuda, Hironobu, Yoshida, Yukinori, Takahashi, Shinichi, Natsume, Osamu, Nagao, Mizuho, Yamada, Yoshiyuki, Members of systematic review team, Okafuji, Ikuo, Yamamoto-Hanada, Kiwako, Nakajima, Yoichi, Tanaka, Yuya, Suzuki, Shuichi, Sato, Kotaro, Murai, Hiroki, Miura, Taro, Hiraguchi, Yukiko, Takaoka, Yuri, Manabe, Tetsuharu, Kuwabara, Yu, Akashi, Kenichi, Nishikido, Tomoki, Sugimoto, Mayumi, Maeda, Mayu, Kawamoto, Norio, Takahashi, Kyohei, Yamaide, Akiko, Wada, Takuya, Kitazawa, Hiroshi, Saito, Mayako, Executive Adviser, and Nishima, Sankei

Published
2022
Full Text
View/download PDF

11. Kyushu and Okinawa Regions

Author

Arakawa, Yusuke, Kusaba, Takashi, Kubotera, Hideo, Uezono, Ichiro, Miyamaru, Naoko, Saeki, Yuichi, Niimi, Hiroshi, Nakano, Keiko, Koga, Nobuhisa, Hara, Yoshitaka, Yamada, Yasunao, Inoue, Katsuhiro, Ihara, Hirotaka, Nagatomo, Makoto, Yoshida, Koichi, Yamaguchi, Noriko, Hayashi, Hiroaki, Kondo, Tomohiro, Yamane, Tsuyoshi, Akagi, Isao, Kinjo, Kazutoshi, Shima, Takeo, Mitsugi, Kojiro, Hartemink, Alfred E., Series Editor, Hatano, Ryusuke, editor, Shinjo, Hitoshi, editor, and Takata, Yusuke, editor

Published
2021
Full Text
View/download PDF

15. Effectiveness of REBCO Trapezoidal Armature Coils Used in Superconducting Induction Motors

Author

Tsumori, Masahiko, Yamasaki, Ryoto, Okade, Yuta, Miyazaki, Hiroshi, Miura, Shun, Sasa, Hiromasa, Yoshida, Koichi, and Iwakuma, Masataka

Abstract

Armature coils that use REBa2Cu3Oy (REBCO) wires are typically racetrack shaped owing to the tape shape of the wires. It is difficult to improve the motor output in armature windings composed of racetrack coils. Previously, we proposed trapezoidal-shaped REBCO coils for armature windings. In this study, we perform electromagnetic simulations of two types of induction motors with armature windings, one composed of trapezoidal coils and the other of racetrack coils. Subsequently, we show that the induction motor using trapezoidal coils exhibit a higher output than that using racetrack coils. Moreover, we present the fabrication of six trapezoidal coils for use in the armature winding and present the current-voltage ($I - V)$ characteristics of the coils to determine the current flow. The results show that a current of 80 A or higher could flow in all the coils. Finally, we present the results from a load test of an induction motor that incorporates the trapezoidal coils for the armature winding and the corresponding torque slip characteristics. The analysis and load test results are comparable, thus experimentally demonstrating the effectiveness of using trapezoidal coils for armature windings to increase the motor output.

Published
2024
Full Text
View/download PDF

18. Japanese guidelines for childhood asthma 2020

Author

Arakawa, Hirokazu, Adachi, Yuichi, Ebisaw, Motohiro, Fujisawa, Takao, Akasawa, Akira, Inoue, Toshishige, Ohya, Yukihiro, Kameda, Makoto, Kurihara, Kazuyuki, Shimojo, Naoki, Suehiro, Yutaka, Mochizuki, Hiroyuki, Yoshihara, Shigemi, Iwanaga, Takashi, Kuroki, Haruo, Takase, Masato, Masuko, Ikuyo, Hirai, Kota, Yoshida, Koichi, Inoue, Yuzaburo, Nagao, Mizuho, Miyaji, Yumiko, Iio, Misa, Ito, Yasunori, Takizawa, Takumi, Futamura, Masaki, Tezuka, Junichiro, Fukuda, Hironobu, Yoshida, Yukinori, Nishimoto, Hajime, Fukuie, Tatsuki, Sato, Sakura, Yamada, Yoshiyuki, Okafuji, Ikuo, Yamamoto-Hanada, Kiwako, Sasaki, Mari, Tanaka, Yuya, Nakajima, Yoichi, Isozaki, Atsushi, Inage, Eisuke, Yagi, Hisako, Shimizu, Mayu, Akashi, Kenichi, Kawamoto, Norio, Manabe, Tetsuharu, Murai, Hiroki, Takaoka, Yuri, Miura, Taro, Hiraguchi, Yukiko, Sugiyama, Takeshi, Sugimoto, Mayumi, Suzuki, Shuichi, Natsume, Osamu, Kitazawa, Hiroshi, Yamaide, Akiko, Wada, Takuya, Nishima, Sankei, and Ebisawa, Motohiro

Published
2020
Full Text
View/download PDF

25. Identification of 45 New Neutron-Rich Isotopes Produced by In-Flight Fission of a 238U Beam at 345 MeV/nucleon

Author

Ohnishi, Tetsuya, Kubo*, Toshiyuki, Kusaka, Kensuke, Yoshida, Atsushi, Yoshida, Koichi, Ohtake, Masao, Fukuda, Naoki, Takeda, Hiroyuki, Kameda, Daisuke, Tanaka, Kanenobu, Inabe, Naohito, Yanagisawa, Yoshiyuki, Gono, Yasuyuki, Watanabe, Hiroshi, Otsu, Hideaki, Baba, Hidetada, Ichihara, Takashi, Yamaguchi, Yoshitaka, Takechi, Maya, Nishimura, Shunji, Ueno, Hideki, Yoshimi, Akihiro, Sakurai, Hiroyoshi, Motobayashi, Tohru, Nakao, Taro, Mizoi, Yutaka, Matsushita, Masafumi, Ieki, Kazuo, Kobayashi, Nobuyuki, Tanaka, Kana, Kawada, Yosuke, Tanaka, Naoki, Deguchi, Shigeki, Satou, Yoshiteru, Kondo, Yosuke, Nakamura, Takashi, Yoshinaga, Kenta, Ishii, Chihiro, Yoshii, Hideakira, Miyashita, Yuki, Uematsu, Nobuya, Shiraki, Yasutsugu, Sumikama, Toshiyuki, Chiba, Junsei, Ideguchi, Eiji, Saito, Akito, Yamaguchi, Takayuki, Hachiuma, Isao, Suzuki, Takeshi, Moriguchi, Tetsuaki, Ozawa, Akira, Ohtsubo, Takashi, Famiano, Michael A., Geissel, Hans, Nettleton, Anthony S., Tarasov, Oleg B., Bazin, Daniel P., Sherrill, Bradley M., Manikonda, Shashikant L., and Nolen, Jerry A.

Subjects
Nuclear Experiment
Abstract

A search for new isotopes using in-flight fission of a 345 MeV/nucleon 238U beam has been carried out at the RI Beam Factory at the RIKEN Nishina Center. Fission fragments were analyzed and identified by using the superconducting in-flight separator BigRIPS. We observed 45 new neutron-rich isotopes: 71Mn, 73,74Fe, 76Co, 79Ni, 81,82Cu, 84,85Zn, 87Ga, 90Ge, 95Se, 98Br, 101Kr, 103Rb, 106,107Sr, 108,109Y, 111,112Zr, 114,115Nb, 115,116,117Mo, 119,120Tc, 121,122,123,124Ru, 123,124,125,126Rh, 127,128Pd, 133Cd, 138Sn, 140Sb, 143Te, 145I, 148Xe, and 152Ba.

Published
2010
Full Text
View/download PDF

30. Spallation reaction study for the long-lived fission products in nuclear waste: Cross section measurements for 137Cs, 90Sr and 107Pd using inverse kinematics method

Author

Wang, He, Otsu, Hideaki, Sakurai, Hiroyoshi, Ahn, DeukSoon, Chiga, Nobuyuki, Doornenbal, Pieter, Fukuda, Naoki, Isobe, Tadaaki, Kubo, Toshiyuki, Kubono, Shigeru, Lorusso, Giusseppe, Söderström, Pär-Anders, Suzuki, Hiroshi, Takeda, Hiroyuki, Watanabe, Yasushi, Yoshida, Koichi, Matsuzaki, Teiichiro, Shimizu, Yohei, Sumikama, Toshiyuki, Uesaka, Meiko, Kawase, Shoichiro, Nakano, Keita, Watanabe, Yukinobu, Araki, Shouhei, Kin, Tadahiro, Takeuchi, Satoshi, Togano, Yasuhiro, Nakamura, Takashi, Kondo, Yosuke, Ozaki, Tomoyuki, Saito, Atsumi, Tsubota, Junichi, Aikawa, Masayuki, Makinaga, Ayano, Ando, Takashi, Koyama, Shunpei, Momiyama, Satoru, Nagamine, Shunsuke, Niikura, Megumi, Saito, Takeshi, Taniuchi, Ryo, Wimmer, Kathrin, Kawakami, Shunsuke, Maeda, Yukie, Yamamoto, Tatsuya, Shiga, Yoshiaki, Matsushita, Masafumi, Michimasa, Shin’ichiro, and Shimoura, Susumu

Published
2017
Full Text
View/download PDF

33. Current Distribution Among Transposed Eight- and 16-Parallel REBa2Cu3Oy Wires in Single-Phase Armature Coils

Author

Miura, Shun, Kobun, Asato, Masuda, Yohei, Kawasaki, Goki, Miyazaki, Hiroshi, Kawagoe, Akifumi, Sasa, Hiromasa, Yoshida, Koichi, Sato, Seiki, and Iwakuma, Masataka

Abstract

Fully superconducting synchronous motors employing superconducting armature and field coils, have a great possibility for electric propulsion systems in aircraft applications, owing to their high output power density (kW/kg). To realize a large current capacity in REBa2Cu3Oy superconducting armature coils, we have proposed a cabling design for the transposed multi-strand parallel conductors. In this study, branch currents among eight- and 16-strand parallel conductors having only one transposition into a coil, were investigated. The analytical calculations showed approximately uniform branch current for the eight- and 16-strand conductors. According to the calculations, the deviations to the uniform branch current of eight-strand parallel conductors were ±7%. The approximately uniform current for the eight-strand conductors were also demonstrated experimentally by small-sized sample coils.

Published
2024
Full Text
View/download PDF

35. Transmission Laser Beam Control Techniques for Active Free Space Optics Systems

Author

Tsujimura, Takeshi, Izumi, Kiyotaka, Yoshida, Koichi, Diniz Junqueira Barbosa, Simone, Series editor, Chen, Phoebe, Series editor, Du, Xiaoyong, Series editor, Filipe, Joaquim, Series editor, Kara, Orhun, Series editor, Liu, Ting, Series editor, Kotenko, Igor, Series editor, Sivalingam, Krishna M., Series editor, Washio, Takashi, Series editor, Obaidat, Mohammad S., editor, and Holzinger, Andreas, editor

Published
2015
Full Text
View/download PDF

36. Supplementary Figure 1 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

37. Supplementary Figure 3 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

38. Supplementary Figure 5 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

39. Supplementary Figure 4 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

40. Supplementary Figure 2 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

41. Supplementary Table 1 from EGFR Protein Expression in Non–Small Cell Lung Cancer Predicts Response to an EGFR Tyrosine Kinase Inhibitor—A Novel Antibody for Immunohistochemistry or AQUA Technology

Author

Mascaux, Celine, primary, Wynes, Murry W., primary, Kato, Yasufumi, primary, Tran, Cindy, primary, Asuncion, Bernadette Reyna, primary, Zhao, Jason M., primary, Gustavson, Mark, primary, Ranger-Moore, Jim, primary, Gaire, Fabien, primary, Matsubayashi, Jun, primary, Nagao, Toshitaka, primary, Yoshida, Koichi, primary, Ohira, Tatuso, primary, Ikeda, Norihiko, primary, and Hirsch, Fred R., primary

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results