N
Naoki Seto
Researcher at Osaka University
Publications - 65
Citations - 3189
Naoki Seto is an academic researcher from Osaka University. The author has contributed to research in topics: Gravitational wave & Laser beam welding. The author has an hindex of 25, co-authored 56 publications receiving 2564 citations. Previous affiliations of Naoki Seto include California Institute of Technology & National Institutes of Natural Sciences, Japan.
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Journal ArticleDOI
Possibility of direct measurement of the acceleration of the universe using 0.1-Hz band laser interferometer gravitational wave antenna in space
TL;DR: It may be possible to construct a laser interferometer gravitational wave antenna in space with h(rms) approximately 10(-27) at f approximately 0.1 Hz and the formula for phase shift due to accelerating motion might be applied for binary sources of LISA.
Journal ArticleDOI
The Japanese space gravitational wave antenna?DECIGO
Seiji Kawamura,Masaki Ando,Takashi Nakamura,K. Tsubono,Takahiro Tanaka,I. Funaki,Naoki Seto,Kenji Numata,Shuichi Sato,Kunihito Ioka,Nobuyuki Kanda,T. Takashima,Kazuhiro Agatsuma,Tomotada Akutsu,Koh-suke Aoyanagi,Koji Arai,Y. Arase,Akito Araya,Hideki Asada,Yoichi Aso,Takeshi Chiba,Toshikazu Ebisuzaki,Motohiro Enoki,Yoshiharu Eriguchi,Masa-Katsu Fujimoto,Ryuichi Fujita,Mitsuhiro Fukushima,Toshifumi Futamase,Katsuhiko Ganzu,Tomohiro Harada,Tatsuaki Hashimoto,Kazuhiro Hayama,Wataru Hikida,Yoshiaki Himemoto,Hisashi Hirabayashi,Takashi Hiramatsu,Feng-Lei Hong,Hideyuki Horisawa,Mizuhiko Hosokawa,Kiyotomo Ichiki,Takeshi Ikegami,Kaiki Taro Inoue,Koji Ishidoshiro,Hideki Ishihara,Takehiko Ishikawa,Hideharu Ishizaki,Hiroyuki Ito,Yousuke Itoh,S. Kamagasako,Nobuki Kawashima,Fumiko Kawazoe,Hiroyuki Kirihara,Naoko Kishimoto,Kenta Kiuchi,Shiho Kobayashi,Kazunori Kohri,Hiroyuki Koizumi,Yasufumi Kojima,Keiko Kokeyama,Wataru Kokuyama,Kei Kotake,Yoshihide Kozai,Hideaki Kudoh,Hiroo Kunimori,H. Kuninaka,Kazuaki Kuroda,Keiichi Maeda,Hideo Matsuhara,Yasushi Mino,Osamu Miyakawa,Shinji Miyoki,Mutsuko Y. Morimoto,T. Morioka,Toshiyuki Morisawa,Shigenori Moriwaki,Shinji Mukohyama,Mitsuru Musha,Shigeo Nagano,Isao Naito,N. Nakagawa,Kouji Nakamura,Hiroyuki Nakano,Ken-ichi Nakao,Shinichi Nakasuka,Yoshinori Nakayama,E. Nishida,Kazutaka Nishiyama,Atsushi J. Nishizawa,Yoshito Niwa,Masatake Ohashi,Naoko Ohishi,Masashi Ohkawa,Akira Okutomi,Kouji Onozato,K. Oohara,Norichika Sago,Motoyuki Saijo,Masa-aki Sakagami,Shin-ichiro Sakai,Shihori Sakata,Misao Sasaki,Takashi Sato,Masaru Shibata,Hisa-aki Shinkai,Kentaro Somiya,Hajime Sotani,Naoshi Sugiyama,Yudai Suwa,Hideyuki Tagoshi,Kakeru Takahashi,Tadayuki Takahashi,Hirotaka Takahashi,Ryuichi Takahashi,Akiteru Takamori,Tetsushi Takano,Keisuke Taniguchi,Atsushi Taruya,Hiroyuki Tashiro,M. Tokuda,Masao Tokunari,Morio Toyoshima,Shinji Tsujikawa,Yoshiki Tsunesada,Ken-ichi Ueda,Masayoshi Utashima,Hiroshi Yamakawa,Kazuhiro Yamamoto,Toshitaka Yamazaki,Jun'ichi Yokoyama,Chul-Moon Yoo,Shijun Yoshida,Taizoh Yoshino +131 more
TL;DR: DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) as discussed by the authors is the future Japanese space gravitational wave antenna, which aims at detecting various kinds of gravitational waves between 1 mHz and 100 Hz frequently enough to open a new window of observation for gravitational wave astronomy.
Journal ArticleDOI
Dynamics of keyhole and molten pool in laser welding
TL;DR: In this paper, the authors have conducted systematic studies on observation of keyhole as well as weld pool dynamics and their related phenomena to reveal the mechanism of porosity formation and its suppression methods.
Journal ArticleDOI
The status of DECIGO
Shuichi Sato,Seiji Kawamura,Masaki Ando,Takashi Nakamura,K. Tsubono,Akito Araya,Ikkoh Funaki,Kunihito Ioka,Nobuyuki Kanda,Shigenori Moriwaki,Mitsuru Musha,Kazuhiro Nakazawa,Kenji Numata,Shin-ichiro Sakai,Naoki Seto,Takeshi Takashima,Takahiro Tanaka,Kazuhiro Agatsuma,Koh Suke Aoyanagi,Koji Arai,Hideki Asada,Yoichi Aso,Takeshi Chiba,Toshikazu Ebisuzaki,Yumiko Ejiri,Motohiro Enoki,Yoshiharu Eriguchi,Masa Katsu Fujimoto,Ryuichi Fujita,Mitsuhiro Fukushima,Toshifumi Futamase,Katsuhiko Ganzu,Tomohiro Harada,Tatsuaki Hashimoto,K. Hayama,Wataru Hikida,Yoshiaki Himemoto,Hisashi Hirabayashi,Takashi Hiramatsu,Feng-Lei Hong,Hideyuki Horisawa,Mizuhiko Hosokawa,Kiyotomo Ichiki,Takeshi Ikegami,Kaiki Taro Inoue,Koji Ishidoshiro,Hideki Ishihara,Takehiko Ishikawa,Hideharu Ishizaki,Hiroyuki Ito,Yousuke Itoh,Nobuki Kawashima,Fumiko Kawazoe,Naoko Kishimoto,Kenta Kiuchi,Shiho Kobayashi,Kazunori Kohri,Hiroyuki Koizumi,Yasufumi Kojima,Keiko Kokeyama,Wataru Kokuyama,Kei Kotake,Yoshihide Kozai,Hideaki Kudoh,Hiroo Kunimori,Hitoshi Kuninaka,Kazuaki Kuroda,Keiichi Maeda,Hideo Matsuhara,Yasushi Mino,Osamu Miyakawa,Shinji Miyoki,Mutsuko Y. Morimoto,T. Morioka,Toshiyuki Morisawa,Shinji Mukohyama,Shigeo Nagano,Isao Naito,Kouji Nakamura,Hiroyuki Nakano,Ken-ichi Nakao,Shinichi Nakasuka,Yoshinori Nakayama,E. Nishida,Kazutaka Nishiyama,Atsushi J. Nishizawa,Yoshito Niwa,Taiga Noumi,Yoshiyuki Obuchi,Masatake Ohashi,Naoko Ohishi,Masashi Ohkawa,Norio Okada,Kouji Onozato,Ken-ichi Oohara,Norichika Sago,Motoyuki Saijo,Masa-aki Sakagami,S. Sakata,Misao Sasaki,Takashi Sato,Masaru Shibata,Hisa-aki Shinkai,Kentaro Somiya,Hajime Sotani,Naoshi Sugiyama,Yudai Suwa,Rieko Suzuki,Hideyuki Tagoshi,Fuminobu Takahashi,Kakeru Takahashi,Keitaro Takahashi,Ryutaro Takahashi,Ryuichi Takahashi,Tadayuki Takahashi,Hirotaka Takahashi,Takamori Akiteru,Tadashi Takano,Keisuke Taniguchi,Atsushi Taruya,Hiroyuki Tashiro,Yasuo Torii,Morio Toyoshima,Shinji Tsujikawa,Yoshiki Tsunesada,Akitoshi Ueda,Ken-ichi Ueda,Masayoshi Utashima,Yaka Wakabayashi,Hiroshi Yamakawa,Kazuhiro Yamamoto,Toshitaka Yamazaki,Jun'ichi Yokoyama,Chul-Moon Yoo,Shijun Yoshida,Taizoh Yoshino +135 more
TL;DR: DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) is the planned Japanese space gravitational wave antenna, aiming to detect gravitational waves from astrophysically and cosmologically significant sources mainly between 1 Hz and 10 Hz as mentioned in this paper.
Journal ArticleDOI
High-speed simultaneous observation of plasma and keyhole behavior during high power CO2 laser welding: Effect of shielding gas on porosity formation
TL;DR: In this paper, the interrelationship between keyhole and plasma behavior was examined, and it was revealed that the keyhole fluctuates frequently and changes its size and shape, corresponding to the intermittent bubble formation.