631 results on '"Chiba, Takeshi"'
Search Results
152. Erratum: Baryogenesis in a Flat Direction with Neither Baryon nor Lepton Charge [Phys. Rev. Lett.92, 011301 (2004)]
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Chiba, Takeshi, primary, Takahashi, Fuminobu, additional, and Yamaguchi, Masahide, additional
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- 2015
- Full Text
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153. Activity of Natural Moisturizing Factor Forming Enzyme Bleomycin Hydrolase in Atopic Dermatitis Affected By Disease Control Status and Seasonal Change
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Chiba, Takeshi, primary
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- 2015
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154. Skin Prick Test with Heated Fruit for Differentiating Fruit Allergy with Systemic Reaction from That with Oral Reaction
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Natsume, Osamu, primary, Fukuie, Tatsuki, additional, Yasuoka, Ryuhei, additional, Tajima, Iwao, additional, Chiba, Takeshi, additional, Kondo, Mai, additional, Taguchi, Tomohide, additional, Narita, Masami, additional, Futamura, Masaki, additional, Kitazawa, Hiroshi, additional, and Ohya, Yukihiro, additional
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- 2015
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155. Serotonin Regulates β-Casein Expression via 5-HT7 Receptors in Human Mammary Epithelial MCF-12A Cells
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Chiba, Takeshi, primary, Kimura, Soichiro, additional, Takahashi, Katsuo, additional, Morimoto, Yasunori, additional, Maeda, Tomoji, additional, Sanbe, Atsushi, additional, Ueda, Hideo, additional, and Kudo, Kenzo, additional
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- 2015
- Full Text
- View/download PDF
156. Motion of charged particles around a weakly magnetized rotating black hole
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Shiose, Ryo, primary, Kimura, Masashi, additional, and Chiba, Takeshi, additional
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- 2014
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157. DECIGO pathfinder
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Ando, Masaki, Kawamura, Seiji, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, Seto, Naoki, Numata, Kenji, Sato, Shuichi, Ioka, Kunihito, Kanda, Nobuyuki, Takashima, Takeshi, Agatsuma, Kazuhiro, Akutsu, Tomotada, Akutsu, Tomomi, Aoyanagi, Koh-suke, Arai, Koji, Arase, Yuta, Araya, Akito, Asada, Hideki, Aso, Yoichi, Chiba, Takeshi, Ebisuzaki, Toshikazu, Enoki, Motohiro, Eriguchi, Yoshiharu, Fujimoto, Masa-Katsu, Fujita, Ryuichi, Fukushima, Mitsuhiro, Futamase, Toshifumi, Ganzu, Katsuhiko, Harada, Tomohiro, Hashimoto, Tatsuaki, Hayama, Kazuhiro, Hikida, Wataru, Himemoto, Yoshiaki, Hirabayashi, Hisashi, Hiramatsu, Takashi, Hong, Feng-Lei, Horisawa, Hideyuki, Hosokawa, Mizuhiko, Ichiki, Kiyotomo, Ikegami, Takashi, Inoue, Kaiki T., Ishidoshiro, Koji, Ishihara, Hideki, Ishikawa, Takehiko, Ishizaki, Hideharu, Ito, Hiroyuki, Itoh, Yousuke, Kamagasako, Shogo, Kawashima, Nobuki, Kawazoe, Fumiko, Kirihara, Hiroyuki, Kishimoto, Naoko, Kiuchi, Kenta, Kobayashi, Shiho, Kohri, Kazunori, Koizumi, Hiroyuki, Kojima, Yasufumi, Kokeyama, Keiko, Kokuyama, Wataru, Kotake, Kei, Kozai, Yoshihide, Kudoh, Hideaki, Kunimori, Hiroo, Kuninaka, Hitoshi, Kuroda, Kazuaki, Maeda, Kei-ichi, Matsuhara, Hideo, Mino, Yasushi, Miyakawa, Osamu, Miyoki, Shinji, Morimoto, Mutsuko Y., Morioka, Tomoko, Morisawa, Toshiyuki, Moriwaki, Shigenori, Mukohyama, Shinji, Musha, Mitsuru, Nagano, Shigeo, Naito, Isao, Nakagawa, Noriyasu, Nakamura, Kouji, Nakano, Hiroyuki, Nakao, Kenichi, Nakasuka, Shinichi, Nakayama, Yoshinori, Nishida, Erina, Nishiyama, Kazutaka, Nishizawa, Atsushi, Niwa, Yoshito, Ohashi, Masatake, Ohishi, Naoko, Ohkawa, Masashi, Okutomi, Akira, Onozato, Kouji, Oohara, Kenichi, Sago, Norichika, Saijo, Motoyuki, Sakagami, Masaaki, Sakai, Shin-ichiro, Sakata, Shihori, Sasaki, Misao, Sato, Takashi, Shibata, Masaru, Shinkai, Hisaaki, Somiya, Kentaro, Sotani, Hajime, Sugiyama, Naoshi, Suwa, Yudai, Tagoshi, Hideyuki, Takahashi, Kakeru, Takahashi, Keitaro, Takahashi, Tadayuki, Takahashi, Hirotaka, Takahashi, Ryuichi, Takahashi, Ryutaro, Takamori, Akiteru, Takano, Tadashi, Taniguchi, Keisuke, Taruya, Atsushi, Tashiro, Hiroyuki, Tokuda, Mitsuru, Tokunari, Masao, Toyoshima, Morio, Tsujikawa, Shinji, Tsunesada, Yoshiki, Ueda, Ken-ichi, Utashima, Masayoshi, Yamakawa, Hiroshi, Yamamoto, Kazuhiro, Yamazaki, Toshitaka, Yokoyama, Jun'ichi, Yoo, Chul-Moon, Yoshida, Shijun, and Yoshino, Taizoh
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History ,Computer Science Applications ,Education - Abstract
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected to provide us fruitful insights into the universe, in particular about dark energy, a formation mechanism of supermassive black holes, and the inflation of the universe. Since DECIGO will be an extremely large mission which will formed by three drag-free spacecraft with 1000m separation, it is significant to gain the technical feasibility of DECIGO before its planned launch in 2024. Thus, we are planning to launch two milestone missions: DPF and pre-DECIGO. The conceptual design and current status of the first milestone mission, DPF, are reviewed in this article.
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- 2008
158. 小型重力波観測衛星 DPF
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Kishimoto, Naoko, Kudoh, Hideaki, Kuninaka, Hitoshi, Kunimori, Hiroo, Kuroda, Kazuaki, Koizumi, Hiroyuki, Kohri, Kazunori, Kokuyama, Wataru, Kokeyama, Keiko, Kozai, Yoshihide, Sakai, Shinichiro, Sakagami, Masaaki, Sakata, Shihori, Sasaki, Tadashi, Shibata, Masaru, Shinkai, Hisaaki, Sugiyama, Naoshi, Suwa, Yudai, Somiya, Kentaro, Sotani, Hajime, Takano, Tadashi, Takahashi, Kakeru, Takahashi, Keitaro, Takahashi, Tadayuki, Takahashi, Hirotaka, Takahashi, Ryuich, Takahashi, Ryutaro, Takamori, Akiteru, Tagoshi, Hideyuki, Taniguchi, Keisuke, Taruya, Atsushi, Chiba, Takeshi, Tsujikawa, Shinji, Tsunesada, Yoshiki, Tokunari, Masao, Toyoshima, Morio, Nakao, Ken-ichi, Nakasuka, Shinichi, Nakano, Hiroyuki, Nagano, Shigeo, Nakayama, Yoshinori, Nishiyama, Kazutaka, Niwa, Yoshito, Hashimoto, Tatsuaki, Harada, Tomohiro, Hikida, Wataru, Himemoto, Yoshiaki, Hirabayashi, Hisashi, Hiramatsu, Takashi, Fukushima, Mitsuhiro, Fujita, Ryuichi, Fujimoto, Masa-Katsu, Futamase, Toshifumi, Hosokawa, Mizuhiko, Horisawa, Hideyuki, Maeda, Keiichi, Matsuhara, Hideo, Miyakawa, Osamu, Miyoki, Shinji, Musha, Mitsuru, Morimoto, Mutsuko Y., Moriwaki, Shigenori, Yamakawa, Hiroshi, Yamazaki, Toshitaka, Yamamoto, Kazuhiro, Yokoyama, Jun'ichi, Yoshino, Taizo, Ando, Masaki, Kawamura, Seiji, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, Seto, Naoki, Numata, Kenji, Sato, Syuichi, Kanda, Nobuyuki, Ioka, Kunihito, Takashima, Takeshi, Aoyanagi, Koh-suke, Agatsuma, Kazuhiro, Akutsu, Tomotada, Asada, Hideki, Aso, Yoichi, Arai, Koji, Araya, Akito, Ikegami, Takeshi, Ishikawa, Takehiko, Ishizaki, Hideharu, Ishidoshiro, Koji, Ishihara, Mitsunori, Ichiki, Kiyotomo, Ito, Hiroyuki, Ito, Yosuke, Ueda, Kenichi, Utashima, Masayoshi, Enoki, Motohiro, Ebisuzaki, Tosikazu, Eriguchi, Yoshiharu, Ohishi, Naoko, Ohkawa, Masashi, Ohashi, Masatake, Oohara, Kenichi, Okutomi, Akira, Kawashima, Nobuki, and Kawazoe, Fumiko
- Abstract
第8回宇宙科学シンポジウム (2008年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究本部(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 8th Space Science Symposium (January 8-9, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 135名, 資料番号: SA6000056016, レポート番号: S2-10
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- 2008
159. スペース重力波アンテナDECIGO
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Kishimoto, Naoko, Kudoh, Hideaki, Kuninaka, Hitoshi, Kunimori, Hiroo, Kuroda, Kazuaki, Koizumi, Hiroyuki, Kohri, Kazunori, Kokuyama, Wataru, Kokeyama, Keiko, Kozai, Yoshihide, Sakai, Shinichiro, Sakagami, Masaaki, Sakata, Shihori, Sasaki, Tadashi, Shibata, Masaru, Shinkai, Hisaaki, Sugiyama, Naoshi, Suwa, Yudai, Somiya, Kentaro, Sotani, Hajime, Takano, Tadashi, Takahashi, Kakeru, Takahashi, Keitaro, Takahashi, Tadayuki, Takahashi, Hirotaka, Takahashi, Ryuich, Takahashi, Ryutaro, Takamori, Akiteru, Tagoshi, Hideyuki, Taniguchi, Keisuke, Taruya, Atsushi, Chiba, Takeshi, Tsujikawa, Shinji, Tsunesada, Yoshiki, Tokunari, Masao, Toyoshima, Morio, Nakao, Ken-ichi, Nakasuka, Shinichi, Nakano, Hiroyuki, Nagano, Shigeo, Nakayama, Yoshinori, Nishiyama, Kazutaka, Niwa, Yoshito, Hashimoto, Tatsuaki, Harada, Tomohiro, Hikida, Wataru, Himemoto, Yoshiaki, Hirabayashi, Hisashi, Hiramatsu, Takashi, Fukushima, Mitsuhiro, Fujita, Ryuichi, Fujimoto, Masa-Katsu, Futamase, Toshifumi, Hosokawa, Mizuhiko, Horisawa, Hideyuki, Maeda, Keiichi, Matsuhara, Hideo, Miyakawa, Osamu, Miyoki, Shinji, Musha, Mitsuru, Morimoto, Mutsuko Y., Moriwaki, Shigenori, Yamakawa, Hiroshi, Yamazaki, Toshitaka, Yamamoto, Kazuhiro, Yokoyama, Jun'ichi, Yoshino, Taizo, Kawamura, Seiji, Ando, Masaki, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, Seto, Naoki, Numata, Kenji, Sato, Syuichi, Kanda, Nobuyuki, Ioka, Kunihito, Takashima, Takeshi, Aoyanagi, Koh-suke, Agatsuma, Kazuhiro, Akutsu, Tomotada, Asada, Hideki, Aso, Yoichi, Arai, Koji, Araya, Akito, Ikegami, Takeshi, Ishikawa, Takehiko, Ishizaki, Hideharu, Ishidoshiro, Koji, Ishihara, Mitsunori, Ichiki, Kiyotomo, Ito, Hiroyuki, Ito, Yosuke, Ueda, Kenichi, Utashima, Masayoshi, Enoki, Motohiro, Ebisuzaki, Tosikazu, Eriguchi, Yoshiharu, Ohishi, Naoko, Ohkawa, Masashi, Ohashi, Masatake, Oohara, Kenichi, Okutomi, Akira, Kawashima, Nobuki, and Kawazoe, Fumiko
- Abstract
第8回宇宙科学シンポジウム (2008年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究本部(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 8th Space Science Symposium (January 8-9, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 135名, 資料番号: SA6000056110, レポート番号: P2-78
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- 2008
160. Implications of theB-mode polarization measurement for direct detection of inflationary gravitational waves
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Kuroyanagi, Sachiko, primary, Tsujikawa, Shinji, additional, Chiba, Takeshi, additional, and Sugiyama, Naoshi, additional
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- 2014
- Full Text
- View/download PDF
161. Cosmological scaling solutions for multiple scalar fields
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Chiba, Takeshi, primary, De Felice, Antonio, additional, and Tsujikawa, Shinji, additional
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- 2014
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162. Fahrzeug-zu-X-Funktionen für mehr Sicherheit bei Motorrädern
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Maruyama, Kazuyuki, primary, Chiba, Takeshi, additional, Kizaki, Tokujiro, additional, and Horozovic, Amira, additional
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- 2014
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163. Vehicle-to-x Functions for More Motorcycle Safety
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Maruyama, Kazuyuki, primary, Chiba, Takeshi, additional, Kizaki, Tokujiro, additional, and Horozovic, Amira, additional
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- 2014
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164. A Retrospective Study on the Influence of Nutritional Status on Pain Management in Cancer Patients Using the Transdermal Fentanyl Patch
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Takahashi, Hiroaki, primary, Chiba, Takeshi, additional, Tairabune, Tomohiko, additional, Kimura, Yusuke, additional, Wakabayashi, Go, additional, Takahashi, Katsuo, additional, and Kudo, Kenzo, additional
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- 2014
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165. Serotonin Suppresses β-Casein Expression via Inhibition of the Signal Transducer and Activator of Transcription 5 (STAT5) Protein Phosphorylation in Human Mammary Epithelial Cells MCF-12A
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Chiba, Takeshi, primary, Kimura, Soichiro, additional, Takahashi, Katsuo, additional, Morimoto, Yasunori, additional, Sanbe, Atsushi, additional, Ueda, Hideo, additional, and Kudo, Kenzo, additional
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- 2014
- Full Text
- View/download PDF
166. BI-1-7 レーザー干渉計型宇宙重力波アンテナ : DECIGO計画(BI-1.宇宙へ応用されるレーザ技術,ソサイエティ企画)
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Musha, Mitsuru, Kawamura, Seiji, Ando, Masaki, Seto, Naoki, Sato, Shuichi, Nakamura, Takashi, Tsubono, Kimio, Takashima, Takeshi, Funaki, Ikko, Numata, Kenji, Kanda, Nobuyuki, Tanaka, Takahiro, Ioka, Kunihito, Aoyagi, Kosuke, Wagatsuma, Kazuhiro, Asada, Hideki, Aso, Yoichi, Arai, Koji, Araya, Akito, Ikegami, Takeshi, Ishikawa, Takehiko, Ishizaki, Hideharu, Ishidoshiro, Koji, Ishihara, Hideki, Izumi, Kiwamu, Ichiki, Kiyotomo, Ito, Hiroyuki, Ito, Yosuke, Inoue, Kaiki, Ueda, Akitoshi, Ueda, Kenichi, Utashima, Masayoshi, Ejiri, Yumiko, Enoki, Motohiro, Ebisuzaki, Toshikazu, Eriguchi, Yoshiharu, Oishi, Naoko, Okawa, Masashi, Ohashi, Masatake, Ohara, Kenichi, Obuchi, Yoshiyuki, Okada, Kenshi, Kawashima, Nobuki, Kawazoe, Fumiko, Kono, Isao, Kiuchi, Kenta, Kishimoto, Naoko, Kuninaka, Hitoshi, Kunimori, Hiro, Kuroda, Kazuaki, Koizumi, Hiroyuki, [checking], Kori, Kazunori, Kokuyama, Wataru, Kokeyama, Keiko, Kozai, Yoshihide, Kojima, Yasufumi, Kotake, Kei, Kobayashi, Shiho, Saijo, Motoyuki, Saito, Ryo, Sakai, Shinichiro, Sakagami, Masaaki, Sakata, Shihori, Sago, Norichika, Sasaki, Takashi, Sato, Takashi, Shibata, Masaru, Shinkai, Hisaaki, Sugiyama, Naoshi, Suzuki, Rieko, Suwa, Yudai, Somiya, Kentaro, Sotani, Hajime, Takano, Tadashi, Takahashi, Kakeru, Takahashi, Keitaro, Takahashi, Tadayuki, Takahashi, Hirotaka, Takahashi, Fuminobu, Takahashi, Ryuichi, Takahashi, Ryutaro, Takamori, Akiteru, Tagoshi, Hideyuki, Tashiro, Hiroyuki, Taniguchi, Keisuke, Taruya, Atsushi, Chiba, Takeshi, Tsujikawa, Shinji, Tsunesada, Yoshiki, Toyoshima, Morio, Torii, Yasuo, Naito, Isao, Nakao, Kenichi, Nakazawa, Kazuhiro, Nakasuka, Shinichi, Nakano, Hiroyuki, Nagano, Shigeo, Nakamura, Koji, Nakamura, Masaharu, Nakayama, Yoshinori, Nishizawa, Atsushi, Nishida, Erina, Nishiyama, Kazutaka, Niwa, Yoshito, Nomi, Taiga, Hashimoto, Tatsuaki, Hayama, Kazuhiro, Harada, Tomohiro, Hikita, Wataru, Himemoto, Yoshiaki, Hirabayashi, Hisashi, Hiramatsu, Naoshi, Fukushima, Mitsuhiro, Fujita, Ryuichi, Fujimoto, Masakatsu, Futamase, Toshifumi, Hosokawa, Mizuhiko, Horisawa, Hideyuki, Maeda, Keiichi, Matsuhara, Hideo, Mino, Yasushi, Miyagawa, Osamu, Miyamoto, Umpei, Miyoki, Shinji, Mukoyama, Shinji, Morisawa, Yoshiyuki, Morimoto, Mutsuko, Moriwaki, Shigenori, Yagi, Kento, Yamakawa, Hiroshi, Yamazaki, Toshitaka, Yamamoto, Kazuhiro, Yokoyama, Junichi, Yoshida, Shijun, Yoshino, Taizo, Wakabayashi, Yaka, ムシャ, ミツル, カワムラ, セイジ, アンドウ, マサキ, セト, ナオキ, サトウ, シュウイチ, ナカムラ, タカシ, ツボノ, キミオ, タカシマ, タケシ, フナキ, イッコウ, ヌマタ, ケンジ, カンダ, ノブユキ, タナカ, タカヒロ, イオカ, クニヒト, アオヤギ, コウスケ, ワガツマ, カズヒロ, アサダ, ヒデキ, アソウ, ヨウイチ, アライ, コウジ, アラヤ, アキト, イケガミ, タケシ, イシカワ, タケヒコ, イシザキ, ヒデハル, イシドシロ, コウジ, イシハラ, ヒデキ, イズミ, キワム, イチキ, キヨトモ, イトウ, ヒロユキ, イトウ, ヨウスケ, イノウエ, カイキ, ウエダ, アキトシ, ウエダ, ケンイチ, ウタシマ, マサヨシ, エジリ, ユミコ, エノキ, モトヒロ, エビスザキ, トシカズ, エリグチ, ヨシハル, オオイシ, ナオコ, オオカワ, マサシ, オオハシ, マサタケ, オオハラ, ケンイチ, オオブチ, ヨシユキ, オカダ, ケンシ, カワシマ, ノブキ, カワゾエ, フミコ, コウノ, イサオ, キウチ, ケンタ, キシモト, ナオコ, クニナカ, ヒトシ, クニモリ, ヒロオ, クロダ, カズアキ, コイズミ, ヒロユキ, [ヨミ等調査中], コオリ, カズノリ, コクヤマ, ワタル, コケヤマ, ケイコ, コザイ, ヨシヒデ, コジマ, ヤスフミ, コタケ, ケイ, コバヤシ, シホ, サイジョウ, モトユキ, サイトウ, リョウ, サカイ, シンイチロウ, サカガミ, マサアキ, サカタ, シホリ, サゴウ, ノリチカ, ササキ, タカシ, サトウ, タカシ, シバタ, マサル, シンカイ, ヒサアキ, スギヤマ, ナオシ, スズキ, リエコ, スワ, ユウダイ, ソウミヤ, ケンタロウ, ソタニ, ハジメ, タカノ, タダシ, タカハシ, カケル, タカハシ, ケイタロウ, タカハシ, タダユキ, タカハシ, ヒロタカ, タカハシ, フミノブ, タカハシ, リュウイチ, タカハシ, リュウタロウ, タカモリ, アキテル, タゴシ, ヒデユキ, タシロ, ヒロユキ, タニグチ, ケイスケ, タルヤ, アツシ, チバ, タケシ, ツジカワ, シンジ, ツネサダ, ヨシキ, トヨシマ, モリオ, トリイ, ヤスオ, ナイトウ, イサオ, ナカオ, ケンイチ, ナカザワ, カズヒロ, ナカスカ, シンイチ, ナカノ, ヒロユキ, ナガノ, シゲオ, ナカムラ, コウジ, ナカムラ, マサハル, ナカヤマ, ヨシノリ, ニシザワ, アツシ, ニシダ, エリナ, ニシヤマ, カズタカ, ニワ, ヨシト, ノミ, タイガ, ハシモト, タツアキ, ハヤマ, カズヒロ, ハラダ, トモヒロ, ヒキタ, ワタル, ヒメモト, ヨシアキ, ヒラバヤシ, ヒサシ, ヒラマツ, ナオシ, フクシマ, ミツヒロ, フジタ, リュウイチ, フジモト, マサカツ, フタマセ, トシフミ, ホソカワ, ミズヒコ, ホリサワ, ヒデユキ, マエダ, ケイイチ, マツハラ, ヒデオ, ミノ, ヤスシ, ミヤガワ, オサム, ミヤモト, ウンペイ, ミヨキ, シンジ, ムコウヤマ, シンジ, モリサワ, ヨシユキ, モリモト, ムツコ, モリワキ, シゲノリ, ヤギ, ケント, ヤマカワ, ヒロシ, ヤマザキ, トシタカ, ヤマモト, カズヒロ, ヨコヤマ, ジュンイチ, ヨシダ, シジュン, ヨシノ, タイゾウ, ワカバヤシ, ヤカ, 武者, 満, 川村, 静児, 安東, 正樹, 瀬戸, 直樹, 佐藤, 修一, 中村, 卓史, 坪野, 公夫, 高島, 健, 船木, 一幸, 沼田, 健司, 神田, 展行, 田中, 貴浩, 井岡, 邦仁, 青柳, 巧介, 我妻, 一博, 浅田, 秀樹, 麻生, 洋一, 新井, 宏二, 新谷, 昌人, 池上, 健, 石川, 毅彦, 石崎, 秀晴, 石徹白, 晃治, 石原, 秀樹, 和泉, 究, 市來, 淨與, 伊東, 宏之, 伊藤, 洋介, 井上, 開輝, 上田, 暁俊, 植田, 憲一, 歌島, 昌由, 江尻, 悠美子, 榎, 基宏, 戎崎, 俊一, 江里口, 良治, 大石, 奈緒子, 大河, 正志, 大橋, 正健, 大原, 謙一, 大渕, 喜之, 岡田, 健志, 河島, 信樹, 川添, 史子, 河野, 功, 木内, 建太, 岸本, 直子, 國中, 均, 國森, 裕生, 黒田, 和明, 小泉, 宏之, 洪, 鋒雷, 郡, 和範, 穀山, 渉, 苔山, 圭以子, 古在, 由秀, 小嶌, 康史, 固武, 慶, 小林, 史歩, 西條, 統之, 齊藤, 遼, 坂井, 真一郎, 阪上, 雅昭, 阪田, 紫帆里, 佐合, 紀親, 佐々木, 節, 佐藤, 孝, 柴田, 大, 真貝, 寿明, 杉山, 直, 鈴木, 理恵子, 諏訪, 雄大, 宗宮, 健太郎, 祖谷, 元, 高野, 忠, 高橋, 走, 高橋, 慶太郎, 高橋, 忠幸, 高橋, 弘毅, 高橋, 史宜, 高橋, 龍一, 高橋, 竜太郎, 高森, 昭光, 田越, 秀行, 田代, 寛之, 谷口, 敬介, 樽家, 篤史, 千葉, 剛, 辻川, 信二, 常定, 芳基, 豊嶋, 守生, 鳥居, 泰男, 内藤, 勲夫, 中尾, 憲一, 中澤, 知洋, 中須賀, 真一, 中野, 寛之, 長野, 重夫, 中村, 康二, 中村, 真大, 中山, 宜典, 西澤, 篤志, 西田, 恵里奈, 西山, 和孝, 丹羽, 佳人, 能見, 大河, 橋本, 樹明, 端山, 和大, 原田, 知広, 疋田, 渉, 姫本, 宣朗, 平林, 久, 平松, 尚志, 福嶋, 美津広, 藤田, 龍一, 藤本, 眞克, 二間瀬, 敏文, 細川, 瑞彦, 堀澤, 秀之, 前田, 恵一, 松原, 英雄, 蓑, 泰志, 宮川, 治, 宮本, 雲平, 三代木, 伸二, 向山, 信治, 森澤, 理之, 森本, 睦子, 森脇, 成典, 八木, 絢外, 山川, 宏, 山崎, 利孝, 山元, 一広, 柳, 哲文, 横山, 順一, 吉田, 至順, 吉野, 泰造, 若林, 野花, Sun, Ke-Xun, Musha, Mitsuru, Kawamura, Seiji, Ando, Masaki, Seto, Naoki, Sato, Shuichi, Nakamura, Takashi, Tsubono, Kimio, Takashima, Takeshi, Funaki, Ikko, Numata, Kenji, Kanda, Nobuyuki, Tanaka, Takahiro, Ioka, Kunihito, Aoyagi, Kosuke, Wagatsuma, Kazuhiro, Asada, Hideki, Aso, Yoichi, Arai, Koji, Araya, Akito, Ikegami, Takeshi, Ishikawa, Takehiko, Ishizaki, Hideharu, Ishidoshiro, Koji, Ishihara, Hideki, Izumi, Kiwamu, Ichiki, Kiyotomo, Ito, Hiroyuki, Ito, Yosuke, Inoue, Kaiki, Ueda, Akitoshi, Ueda, Kenichi, Utashima, Masayoshi, Ejiri, Yumiko, Enoki, Motohiro, Ebisuzaki, Toshikazu, Eriguchi, Yoshiharu, Oishi, Naoko, Okawa, Masashi, Ohashi, Masatake, Ohara, Kenichi, Obuchi, Yoshiyuki, Okada, Kenshi, Kawashima, Nobuki, Kawazoe, Fumiko, Kono, Isao, Kiuchi, Kenta, Kishimoto, Naoko, Kuninaka, Hitoshi, Kunimori, Hiro, Kuroda, Kazuaki, Koizumi, Hiroyuki, [checking], Kori, Kazunori, Kokuyama, Wataru, Kokeyama, Keiko, Kozai, Yoshihide, Kojima, Yasufumi, Kotake, Kei, Kobayashi, Shiho, Saijo, Motoyuki, Saito, Ryo, Sakai, Shinichiro, Sakagami, Masaaki, Sakata, Shihori, Sago, Norichika, Sasaki, Takashi, Sato, Takashi, Shibata, Masaru, Shinkai, Hisaaki, Sugiyama, Naoshi, Suzuki, Rieko, Suwa, Yudai, Somiya, Kentaro, Sotani, Hajime, Takano, Tadashi, Takahashi, Kakeru, Takahashi, Keitaro, Takahashi, Tadayuki, Takahashi, Hirotaka, Takahashi, Fuminobu, Takahashi, Ryuichi, Takahashi, Ryutaro, Takamori, Akiteru, Tagoshi, Hideyuki, Tashiro, Hiroyuki, Taniguchi, Keisuke, Taruya, Atsushi, Chiba, Takeshi, Tsujikawa, Shinji, Tsunesada, Yoshiki, Toyoshima, Morio, Torii, Yasuo, Naito, Isao, Nakao, Kenichi, Nakazawa, Kazuhiro, Nakasuka, Shinichi, Nakano, Hiroyuki, Nagano, Shigeo, Nakamura, Koji, Nakamura, Masaharu, Nakayama, Yoshinori, Nishizawa, Atsushi, Nishida, Erina, Nishiyama, Kazutaka, Niwa, Yoshito, Nomi, Taiga, Hashimoto, Tatsuaki, Hayama, Kazuhiro, Harada, Tomohiro, Hikita, Wataru, Himemoto, Yoshiaki, Hirabayashi, Hisashi, Hiramatsu, Naoshi, Fukushima, Mitsuhiro, Fujita, Ryuichi, Fujimoto, Masakatsu, Futamase, Toshifumi, Hosokawa, Mizuhiko, Horisawa, Hideyuki, Maeda, Keiichi, Matsuhara, Hideo, Mino, Yasushi, Miyagawa, Osamu, Miyamoto, Umpei, Miyoki, Shinji, Mukoyama, Shinji, Morisawa, Yoshiyuki, Morimoto, Mutsuko, Moriwaki, Shigenori, Yagi, Kento, Yamakawa, Hiroshi, Yamazaki, Toshitaka, Yamamoto, Kazuhiro, Yokoyama, Junichi, Yoshida, Shijun, Yoshino, Taizo, Wakabayashi, Yaka, ムシャ, ミツル, カワムラ, セイジ, アンドウ, マサキ, セト, ナオキ, サトウ, シュウイチ, ナカムラ, タカシ, ツボノ, キミオ, タカシマ, タケシ, フナキ, イッコウ, ヌマタ, ケンジ, カンダ, ノブユキ, タナカ, タカヒロ, イオカ, クニヒト, アオヤギ, コウスケ, ワガツマ, カズヒロ, アサダ, ヒデキ, アソウ, ヨウイチ, アライ, コウジ, アラヤ, アキト, イケガミ, タケシ, イシカワ, タケヒコ, イシザキ, ヒデハル, イシドシロ, コウジ, イシハラ, ヒデキ, イズミ, キワム, イチキ, キヨトモ, イトウ, ヒロユキ, イトウ, ヨウスケ, イノウエ, カイキ, ウエダ, アキトシ, ウエダ, ケンイチ, ウタシマ, マサヨシ, エジリ, ユミコ, エノキ, モトヒロ, エビスザキ, トシカズ, エリグチ, ヨシハル, オオイシ, ナオコ, オオカワ, マサシ, オオハシ, マサタケ, オオハラ, ケンイチ, オオブチ, ヨシユキ, オカダ, ケンシ, カワシマ, ノブキ, カワゾエ, フミコ, コウノ, イサオ, キウチ, ケンタ, キシモト, ナオコ, クニナカ, ヒトシ, クニモリ, ヒロオ, クロダ, カズアキ, コイズミ, ヒロユキ, [ヨミ等調査中], コオリ, カズノリ, コクヤマ, ワタル, コケヤマ, ケイコ, コザイ, ヨシヒデ, コジマ, ヤスフミ, コタケ, ケイ, コバヤシ, シホ, サイジョウ, モトユキ, サイトウ, リョウ, サカイ, シンイチロウ, サカガミ, マサアキ, サカタ, シホリ, サゴウ, ノリチカ, ササキ, タカシ, サトウ, タカシ, シバタ, マサル, シンカイ, ヒサアキ, スギヤマ, ナオシ, スズキ, リエコ, スワ, ユウダイ, ソウミヤ, ケンタロウ, ソタニ, ハジメ, タカノ, タダシ, タカハシ, カケル, タカハシ, ケイタロウ, タカハシ, タダユキ, タカハシ, ヒロタカ, タカハシ, フミノブ, タカハシ, リュウイチ, タカハシ, リュウタロウ, タカモリ, アキテル, タゴシ, ヒデユキ, タシロ, ヒロユキ, タニグチ, ケイスケ, タルヤ, アツシ, チバ, タケシ, ツジカワ, シンジ, ツネサダ, ヨシキ, トヨシマ, モリオ, トリイ, ヤスオ, ナイトウ, イサオ, ナカオ, ケンイチ, ナカザワ, カズヒロ, ナカスカ, シンイチ, ナカノ, ヒロユキ, ナガノ, シゲオ, ナカムラ, コウジ, ナカムラ, マサハル, ナカヤマ, ヨシノリ, ニシザワ, アツシ, ニシダ, エリナ, ニシヤマ, カズタカ, ニワ, ヨシト, ノミ, タイガ, ハシモト, タツアキ, ハヤマ, カズヒロ, ハラダ, トモヒロ, ヒキタ, ワタル, ヒメモト, ヨシアキ, ヒラバヤシ, ヒサシ, ヒラマツ, ナオシ, フクシマ, ミツヒロ, フジタ, リュウイチ, フジモト, マサカツ, フタマセ, トシフミ, ホソカワ, ミズヒコ, ホリサワ, ヒデユキ, マエダ, ケイイチ, マツハラ, ヒデオ, ミノ, ヤスシ, ミヤガワ, オサム, ミヤモト, ウンペイ, ミヨキ, シンジ, ムコウヤマ, シンジ, モリサワ, ヨシユキ, モリモト, ムツコ, モリワキ, シゲノリ, ヤギ, ケント, ヤマカワ, ヒロシ, ヤマザキ, トシタカ, ヤマモト, カズヒロ, ヨコヤマ, ジュンイチ, ヨシダ, シジュン, ヨシノ, タイゾウ, ワカバヤシ, ヤカ, 武者, 満, 川村, 静児, 安東, 正樹, 瀬戸, 直樹, 佐藤, 修一, 中村, 卓史, 坪野, 公夫, 高島, 健, 船木, 一幸, 沼田, 健司, 神田, 展行, 田中, 貴浩, 井岡, 邦仁, 青柳, 巧介, 我妻, 一博, 浅田, 秀樹, 麻生, 洋一, 新井, 宏二, 新谷, 昌人, 池上, 健, 石川, 毅彦, 石崎, 秀晴, 石徹白, 晃治, 石原, 秀樹, 和泉, 究, 市來, 淨與, 伊東, 宏之, 伊藤, 洋介, 井上, 開輝, 上田, 暁俊, 植田, 憲一, 歌島, 昌由, 江尻, 悠美子, 榎, 基宏, 戎崎, 俊一, 江里口, 良治, 大石, 奈緒子, 大河, 正志, 大橋, 正健, 大原, 謙一, 大渕, 喜之, 岡田, 健志, 河島, 信樹, 川添, 史子, 河野, 功, 木内, 建太, 岸本, 直子, 國中, 均, 國森, 裕生, 黒田, 和明, 小泉, 宏之, 洪, 鋒雷, 郡, 和範, 穀山, 渉, 苔山, 圭以子, 古在, 由秀, 小嶌, 康史, 固武, 慶, 小林, 史歩, 西條, 統之, 齊藤, 遼, 坂井, 真一郎, 阪上, 雅昭, 阪田, 紫帆里, 佐合, 紀親, 佐々木, 節, 佐藤, 孝, 柴田, 大, 真貝, 寿明, 杉山, 直, 鈴木, 理恵子, 諏訪, 雄大, 宗宮, 健太郎, 祖谷, 元, 高野, 忠, 高橋, 走, 高橋, 慶太郎, 高橋, 忠幸, 高橋, 弘毅, 高橋, 史宜, 高橋, 龍一, 高橋, 竜太郎, 高森, 昭光, 田越, 秀行, 田代, 寛之, 谷口, 敬介, 樽家, 篤史, 千葉, 剛, 辻川, 信二, 常定, 芳基, 豊嶋, 守生, 鳥居, 泰男, 内藤, 勲夫, 中尾, 憲一, 中澤, 知洋, 中須賀, 真一, 中野, 寛之, 長野, 重夫, 中村, 康二, 中村, 真大, 中山, 宜典, 西澤, 篤志, 西田, 恵里奈, 西山, 和孝, 丹羽, 佳人, 能見, 大河, 橋本, 樹明, 端山, 和大, 原田, 知広, 疋田, 渉, 姫本, 宣朗, 平林, 久, 平松, 尚志, 福嶋, 美津広, 藤田, 龍一, 藤本, 眞克, 二間瀬, 敏文, 細川, 瑞彦, 堀澤, 秀之, 前田, 恵一, 松原, 英雄, 蓑, 泰志, 宮川, 治, 宮本, 雲平, 三代木, 伸二, 向山, 信治, 森澤, 理之, 森本, 睦子, 森脇, 成典, 八木, 絢外, 山川, 宏, 山崎, 利孝, 山元, 一広, 柳, 哲文, 横山, 順一, 吉田, 至順, 吉野, 泰造, 若林, 野花, and Sun, Ke-Xun
- Abstract
本文データは学協会の許諾に基づきCiNiiから複製したものである
- Published
- 2013
167. Extended Slow-Roll Conditions and Primordial Fluctuations: Multiple Scalar Fields and Generalized Gravity
- Author
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Chiba, Takeshi, Yamaguchi, Masahide, Chiba, Takeshi, and Yamaguchi, Masahide
- Abstract
As an extension of our previous study, we derive slow-roll conditions for multiple scalar fields which are non-minimally coupled with gravity and for generalized gravity theories of the form $f(\phi,R)$. We provide simple formulae of the spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters., Comment: 15 pages, to appear in JCAP
- Published
- 2008
- Full Text
- View/download PDF
168. Initial Conditions for Vector Inflation
- Author
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Chiba, Takeshi and Chiba, Takeshi
- Abstract
Recently, a model of inflation using non-minimally coupled massive vector fields has been proposed. For a particular choice of non-minimal coupling parameter and for a flat FRW model, the model is reduced to the model of chaotic inflation with massive scalar field. We study the effect of non-zero curvature of the universe on the onset of vector inflation. We find that in a curved universe the dynamics of vector inflation can be different from chaotic inflation, and the fraction of the initial conditions leading to inflationary solutions is reduced compared with the chaotic inflation case., Comment: 12 pages, 5 figures, version to be published in JCAP
- Published
- 2008
- Full Text
- View/download PDF
169. Extended Slow-Roll Conditions and Rapid-Roll Conditions
- Author
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Chiba, Takeshi, Yamaguchi, Masahide, Chiba, Takeshi, and Yamaguchi, Masahide
- Abstract
We derive slow-roll conditions for a scalar field which is non-minimally coupled with gravity in a consistent manner and express spectral indices of scalar/tensor perturbations in terms of the slow-roll parameters. The conformal invariance of the curvature perturbation is proved without linear approximations. Rapid-roll conditions are also derived, and the relation with the slow-roll conditions is discussed., Comment: 15 pages, published version
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- 2008
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170. Precision calculations of the gravitational wave background spectrum from inflation
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Kuroyanagi, Sachiko, Chiba, Takeshi, Sugiyama, Naoshi, Kuroyanagi, Sachiko, Chiba, Takeshi, and Sugiyama, Naoshi
- Abstract
The spectrum of the gravitational wave background originating from quantum fluctuations during inflation is calculated numerically for various inflation models over a wide range of frequencies. We take into account four ingredients : the scalar field dynamics during inflation making no use of the slow-roll approximation, the fermionic decay of the scalar field with a small coupling constant during the reheating process, the change of the effective number of degrees of freedom g_* in the radiation-dominated era, and the anisotropic stress of free-streaming neutrinos. By numerically solving the evolution of gravitational waves during and after inflation up to the present, all of these effects can be examined comprehensively and accurately over a broad spectrum, even at very high frequencies. We find that the spectrum shows (i) a large deviation from the spectrum less accurate obtained by Taylor expanding around the CMB scale using the slow-roll approximation (ii) a characteristic frequency dependence due to the reheating effect, and (iii) damping due to the g_* changes and the neutrino anisotropic stress. We suggest that future analysis of the gravitational wave background should take into consideration the fact that analytical estimates using the Taylor expansion overestimate the amplitude of the spectrum., Comment: 15 pages, 7 figures, accepted for publication in PRD, This version contains major revisions over the previous version, with added calculations of neutrino anisotropic stress; typos corrected
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- 2008
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171. Conformal-frame (in)dependence of cosmological observations in scalar-tensor theory
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Chiba, Takeshi, primary and Yamaguchi, Masahide, additional
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- 2013
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172. Observational constraints on quintessence: Thawing, tracker, and scaling models
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Chiba, Takeshi, primary, De Felice, Antonio, additional, and Tsujikawa, Shinji, additional
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- 2013
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173. Weak Lensing of Galaxy Clusters in MOND
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Takahashi, Ryuichi, Chiba, Takeshi, Takahashi, Ryuichi, and Chiba, Takeshi
- Abstract
We study weak gravitational lensing of galaxy clusters in terms of the MOND (MOdified Newtonian Dynamics) theory. We calculate shears and convergences of background galaxies for three clusters (A1689, CL0024+1654, CL1358+6245) and the mean profile of 42 SDSS (Sloan Digital Sky Survey) clusters and compare them with observational data. The mass profile is modeled as a sum of X-ray gas, galaxies and dark halo. For the shear as a function of the angular radius, MOND predicts a shallower slope than the data irrespective of the critical acceleration parameter $g_0$. The dark halo is necessary to explain the data for any $g_0$ and for three interpolation functions. If the dark halo is composed of massive neutrinos, its mass should be heavier than 2 eV. However the constraint still depends on the dark halo model and there are systematic uncertainties, and hence the more careful study is necessary to put a stringent constraint., Comment: 12 pages, 7 figures, references added, minor changes, accepted for publication in ApJ
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- 2007
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174. A Consistency Relation in Cosmology
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Chiba, Takeshi, Takahashi, Ryuichi, Chiba, Takeshi, and Takahashi, Ryuichi
- Abstract
We provide a consistency relation between cosmological observables in general relativity without relying on the equation of state of dark energy. The consistency relation should be satisfied if general relativity is the correct theory of gravity and dark energy clustering is negligible. As an extension, we also provide the DGP counterpart of the relation., Comment: 8 pages, 1 figure, corrected typos, to be published in Phys.Rev.D
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- 2007
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175. A Null Test of the Cosmological Constant
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Chiba, Takeshi, Nakamura, Takashi, Chiba, Takeshi, and Nakamura, Takashi
- Abstract
We provide a consistency relation between cosmological observables in general relativity with the cosmological constant. Breaking of this relation at any redshift would imply the breakdown of the hypothesis of the cosmological constant as an explanation of the current acceleration of the universe., Comment: 5 pages, 1 figure, references added, to be published in Prog.Theor.Phys
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- 2007
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176. Effective Search Templates for a Primordial Stochastic Gravitational Wave Background
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Chiba, Takeshi, Himemoto, Yoshiaki, Yamaguchi, Masahide, Yokoyama, Jun'ichi, Chiba, Takeshi, Himemoto, Yoshiaki, Yamaguchi, Masahide, and Yokoyama, Jun'ichi
- Abstract
We calculate the signal-to-noise ratio (SNR) of the stochastic gravitational-wave background in an extreme case that its spectrum has a sharp falloff with its amplitude close to the detection threshold. Such a spectral feature is a characteristic imprint of the change in the number of relativistic degrees of freedom on the stochastic background generated during inflation in the early Universe. We find that, although SNR is maximal with the correct template which is proportional to the assumed real spectrum, its sensitivity to the shape of template is fairly weak indicating that a simple power-law template is sufficient to detect the signature., Comment: 13 pages, 4 figures, final version to be published in PRD
- Published
- 2007
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177. Solar System constraints to general f(R) gravity
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Chiba, Takeshi, Smith, Tristan L., Erickcek, Adrienne L., Chiba, Takeshi, Smith, Tristan L., and Erickcek, Adrienne L.
- Abstract
It has been proposed that cosmic acceleration or inflation can be driven by replacing the Einstein-Hilbert action of general relativity with a function f(R) of the Ricci scalar R. Such f(R) gravity theories have been shown to be equivalent to scalar-tensor theories of gravity that are incompatible with Solar System tests of general relativity, as long as the scalar field propagates over Solar System scales. Specifically, the parameterized post-Newtonian (PPN) parameter in the equivalent scalar-tensor theory is gamma=1/2, which is far outside the range allowed by observations. In response to a flurry of papers that questioned the equivalence of f(R) theory to scalar-tensor theories, it was recently shown explicitly, without resorting to the scalar-tensor equivalence, that the vacuum field equations for 1/R gravity around a spherically symmetric mass also yield gamma=1/2. Here we generalize this analysis to f(R) gravity and enumerate the conditions that, when satisfied by the function f(R), lead to the prediction that gamma=1/2.
- Published
- 2007
178. Serotonin suppresses β-casein expression via PTP1B activation in human mammary epithelial cells.
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Chiba, Takeshi, Maeda, Tomoji, Sanbe, Atsushi, and Kudo, Kenzo
- Subjects
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SEROTONIN , *PROTEIN-tyrosine phosphatase , *EPITHELIAL cells , *MAMMARY glands , *CELLULAR signal transduction , *STAT proteins , *CYCLIC-AMP-dependent protein kinase , *EXTRACELLULAR signal-regulated kinases - Abstract
Serotonin (5-hydroxytriptamine, 5-HT) has an important role in milk volume homeostasis within the mammary gland during lactation. We have previously shown that the expression of β-casein, a differentiation marker in mammary epithelial cells, is suppressed via 5-HT-mediated inhibition of signal transduction and activator of transcription 5 (STAT5) phosphorylation in the human mammary epithelial MCF-12A cell line. In addition, the reduction of β-casein in turn was associated with 5-HT 7 receptor expression in the cells. The objective of this study was to determine the mechanisms underlying the 5-HT-mediated suppression of β-casein and STAT5 phosphorylation. The β-casein level and phosphorylated STAT5 (pSTAT5)/STAT5 ratio in the cells co-treated with 5-HT and a protein kinase A (PKA) inhibitor (KT5720) were significantly higher than those of cells treated with 5-HT alone. Exposure to 100 μM db-cAMP for 6 h significantly decreased the protein levels of β-casein and pSTAT5 and the pSTAT5/STAT5 ratio, and significantly increased PTP1B protein levels. In the cells co-treated with 5-HT and an extracellular signal-regulated kinase1/2 (ERK) inhibitor (FR180294) or Akt inhibitor (124005), the β-casein level and pSTAT5/STAT5 ratio were equal to those of cells treated with 5-HT alone. Treatment with 5-HT significantly induced PTP1B protein levels, whereas its increase was inhibited by KT5720. In addition, the PTP1B inhibitor sc-222227 increased the expression levels of β-casein and the pSTAT5/STAT5 ratio. Our observations indicate that PTP1B directly regulates STAT5 phosphorylation and that its activation via the cAMP/PKA pathway downstream of the 5-HT 7 receptor is involved in the suppression of β-casein expression in MCF-12A cells. [ABSTRACT FROM AUTHOR]
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- 2016
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179. Shadows of multi-black holes: Analytic exploration
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Yumoto, Akifumi, primary, Nitta, Daisuke, additional, Chiba, Takeshi, additional, and Sugiyama, Naoshi, additional
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- 2012
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180. Time variation of proton-electron mass ratio and fine structure constant with runaway dilaton
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Chiba, Takeshi, Kobayashi, Tatsuo, Yamaguchi, Masahide, Yokoyama, Jun'ichi, Chiba, Takeshi, Kobayashi, Tatsuo, Yamaguchi, Masahide, and Yokoyama, Jun'ichi
- Abstract
Recent astrophysical observations indicate that the proton-electron mass ratio and the fine structure constant have gone through nontrivial time evolution. We discuss their time variation in the context of a dilaton runaway scenario with gauge coupling unification at the string scale $M_{\rm s}$. We show that the choice of adjustable parameters allows them to fit the same order magnitude of both variations and their (opposite) signs in such a scenario., Comment: 16 pages, 1 figure, to appear in Phys. Rev. D
- Published
- 2006
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181. Solar System constraints to general f(R) gravity
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Chiba, Takeshi, Smith, Tristan L., Erickcek, Adrienne L., Chiba, Takeshi, Smith, Tristan L., and Erickcek, Adrienne L.
- Abstract
It has been proposed that cosmic acceleration or inflation can be driven by replacing the Einstein-Hilbert action of general relativity with a function f(R) of the Ricci scalar R. Such f(R) gravity theories have been shown to be equivalent to scalar-tensor theories of gravity that are incompatible with Solar System tests of general relativity, as long as the scalar field propagates over Solar System scales. Specifically, the PPN parameter in the equivalent scalar-tensor theory is gamma=1/2, which is far outside the range allowed by observations. In response to a flurry of papers that questioned the equivalence of f(R) theory to scalar-tensor theories, it was recently shown explicitly, without resorting to the scalar-tensor equivalence, that the vacuum field equations for 1/R gravity around a spherically symmetric mass also yield gamma= 1/2. Here we generalize this analysis to f(R) gravity and enumerate the conditions that, when satisfied by the function f(R), lead to the prediction that gamma=1/2., Comment: 7 pages, no figures, v2 extended to include dynamical background spacetimes, to appear in PRD
- Published
- 2006
- Full Text
- View/download PDF
182. Numerical Solutions of Inflating Higher Dimensional Global Defects
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Shimono, Satsuki, Chiba, Takeshi, Shimono, Satsuki, and Chiba, Takeshi
- Abstract
We find numerical solutions of Einstein equations and scalar field equation for a global defect in higher dimensional spacetimes ($\geq 6$). We examine in detail the relation among the expansion rate $H$ and the symmetry-breaking scale $\eta$ and the number of extra dimensions $n$ for these solutions. We find that even if the extra dimensions do not have a cigar geometry, the expansion rate $H$ grows as $\eta$ increases, which is opposite to what is needed for the recently proposed mechanism for solving the cosmological constant problem. We also find that the expansion rate $H$ decreases as $n$ increases., Comment: 6 pages, 7 figures, ReVTeX4, Accepted for publication in PRD
- Published
- 2005
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183. w and w' of Scalar Field Models of Dark Energy
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Chiba, Takeshi and Chiba, Takeshi
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Important observables to reveal the nature of dark energy are the equation of state $w$ and its time derivative in units of the Hubble time $w'$. Recently, it is shown that the simplest scalar field models of dark energy (quintessence) occupy rather narrow regions in the $w-w'$ plane. We extend the $w-w'$ plane to $w<-1$ and derive bounds on $w'$ as a function of $w$ for tracker phantom dark energy. We also derive bounds on tracker k-essence., Comment: 7 pages, 2 figures, errors corrected
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- 2005
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184. Classifying the Future of Universes with Dark Energy
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Chiba, Takeshi, Takahashi, Ryuichi, Sugiyama, Naoshi, Chiba, Takeshi, Takahashi, Ryuichi, and Sugiyama, Naoshi
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We classify the future of the universe for general cosmological models including matter and dark energy. If the equation of state of dark energy is less then -1, the age of the universe becomes finite. We compute the rest of the age of the universe for such universe models. The behaviour of the future growth of matter density perturbation is also studied. We find that the collapse of spherical overdensity region is greatly changed if the equation of state of dark energy is less than -1., Comment: references added, to appear in Class. Quantum Grav
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- 2005
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185. Generalized Gravity and a Ghost
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Chiba, Takeshi and Chiba, Takeshi
- Abstract
We show that generalized gravity theories involving the curvature invariants of the Ricci tensor and the Riemann tensor as well as the Ricci scalar are equivalent to multi- scalar-tensor gravities with four derivatives terms. By expanding the action around a vacuum spacetime, the action is reduced to that of the Einstein gravity with four derivative terms, and consequently there appears a massive spin-2 ghost in such generalized gravity theories in addition to a massive spin-0 field., Comment: 8 pages, a reference added
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- 2005
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186. Effect of nutritional status on transdermal fentanyl absorption in cancer patients
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Tairabune, Tomohiko, primary, Takahashi, Hiroaki, additional, Chiba, Takeshi, additional, Sugawara, Atsuko, additional, Kimura, Yusuke, additional, Kudo, Kenzo, additional, Wakabayashi, Go, additional, and Takahashi, Katsuo, additional
- Published
- 2012
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187. The Effect of Plantar Sensation on the Postural Sway of Individuals with Knee Osteoarthritis
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CHIBA, Takeshi, primary, YAMANAKA, Masanori, additional, and TAKEDA, Naoki, additional
- Published
- 2012
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188. Does Positronium Form in the Universe ?
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Chiba, Takeshi, Sugiyama, Naoshi, Chiba, Takeshi, and Sugiyama, Naoshi
- Abstract
Positronium (the bound state of electron and positron) has been thought to be formed after proton decay ($>10^{34}$yr) through collisional recombination and then decays by pair annihilation, thereby changing the matter content of the universe. We revisit the issue of the formation of positronium in the long-term future of the universe in light of recent indication that the universe is dominated by dark energy and dark matter. We find that if the equation of state of dark energy $w$ is less than -1/3 (including the cosmological constant $w=-1$), then the formation of positronium would not be possible, while it is possible through bound-bound transitions for $-1/3\siml w\siml-0.2$, or through collisional recombination for $w\simg-0.2$. The radiation from $\epm$ pair annihilation cannot dominate over $\epm$, while that from proton decay will dominate over baryon and $\epm$ for a while but not over dark matter., Comment: 13 pages, to appear in JCAP
- Published
- 2004
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189. Shadows of colliding black holes
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Nitta, Daisuke, primary, Chiba, Takeshi, additional, and Sugiyama, Naoshi, additional
- Published
- 2011
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190. The Japanese space gravitational wave antenna: DECIGO
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Kawamura, Seiji, primary, Ando, Masaki, additional, Seto, Naoki, additional, Sato, Shuichi, additional, Nakamura, Takashi, additional, Tsubono, Kimio, additional, Kanda, Nobuyuki, additional, Tanaka, Takahiro, additional, Yokoyama, Jun'ichi, additional, Funaki, Ikkoh, additional, Numata, Kenji, additional, Ioka, Kunihito, additional, Takashima, Takeshi, additional, Agatsuma, Kazuhiro, additional, Akutsu, Tomotada, additional, Aoyanagi, Koh-suke, additional, Arai, Koji, additional, Araya, Akito, additional, Asada, Hideki, additional, Aso, Yoichi, additional, Chen, Dan, additional, Chiba, Takeshi, additional, Ebisuzaki, Toshikazu, additional, Ejiri, Yumiko, additional, Enoki, Motohiro, additional, Eriguchi, Yoshiharu, additional, Fujimoto, Masa-Katsu, additional, Fujita, Ryuichi, additional, Fukushima, Mitsuhiro, additional, Futamase, Toshifumi, additional, Harada, Tomohiro, additional, Hashimoto, Tatsuaki, additional, Hayama, Kazuhiro, additional, Hikida, Wataru, additional, Himemoto, Yoshiaki, additional, Hirabayashi, Hisashi, additional, Hiramatsu, Takashi, additional, Hong, Feng-Lei, additional, Horisawa, Hideyuki, additional, Hosokawa, Mizuhiko, additional, Ichiki, Kiyotomo, additional, Ikegami, Takeshi, additional, Inoue, Kaiki T, additional, Ishidoshiro, Koji, additional, Ishihara, Hideki, additional, Ishikawa, Takehiko, additional, Ishizaki, Hideharu, additional, Ito, Hiroyuki, additional, Itoh, Yousuke, additional, Izumi, Kiwamu, additional, Kawano, Isao, additional, Kawashima, Nobuki, additional, Kawazoe, Fumiko, additional, Kishimoto, Naoko, additional, Kiuchi, Kenta, additional, Kobayashi, Shiho, additional, Kohri, Kazunori, additional, Koizumi, Hiroyuki, additional, Kojima, Yasufumi, additional, Kokeyama, Keiko, additional, Kokuyama, Wataru, additional, Kotake, Kei, additional, Kozai, Yoshihide, additional, Kunimori, Hiroo, additional, Kuninaka, Hitoshi, additional, Kuroda, Kazuaki, additional, Kuroyanagi, Sachiko, additional, Maeda, Kei-ichi, additional, Matsuhara, Hideo, additional, Matsumoto, Nobuyuki, additional, Michimura, Yuta, additional, Miyakawa, Osamu, additional, Miyamoto, Umpei, additional, Miyoki, Shinji, additional, Morimoto, Mutsuko Y, additional, Morisawa, Toshiyuki, additional, Moriwaki, Shigenori, additional, Mukohyama, Shinji, additional, Musha, Mitsuru, additional, Nagano, Shigeo, additional, Naito, Isao, additional, Nakamura, Kouji, additional, Nakano, Hiroyuki, additional, Nakao, Kenichi, additional, Nakasuka, Shinichi, additional, Nakayama, Yoshinori, additional, Nakazawa, Kazuhiro, additional, Nishida, Erina, additional, Nishiyama, Kazutaka, additional, Nishizawa, Atsushi, additional, Niwa, Yoshito, additional, Noumi, Taiga, additional, Obuchi, Yoshiyuki, additional, Ohashi, Masatake, additional, Ohishi, Naoko, additional, Ohkawa, Masashi, additional, Okada, Kenshi, additional, Okada, Norio, additional, Oohara, Kenichi, additional, Sago, Norichika, additional, Saijo, Motoyuki, additional, Saito, Ryo, additional, Sakagami, Masaaki, additional, Sakai, Shin-ichiro, additional, Sakata, Shihori, additional, Sasaki, Misao, additional, Sato, Takashi, additional, Shibata, Masaru, additional, Shinkai, Hisaaki, additional, Shoda, Ayaka, additional, Somiya, Kentaro, additional, Sotani, Hajime, additional, Sugiyama, Naoshi, additional, Suwa, Yudai, additional, Suzuki, Rieko, additional, Tagoshi, Hideyuki, additional, Takahashi, Fuminobu, additional, Takahashi, Kakeru, additional, Takahashi, Keitaro, additional, Takahashi, Ryutaro, additional, Takahashi, Ryuichi, additional, Takahashi, Tadayuki, additional, Takahashi, Hirotaka, additional, Akiteru, Takamori, additional, Takano, Tadashi, additional, Tanaka, Nobuyuki, additional, Taniguchi, Keisuke, additional, Taruya, Atsushi, additional, Tashiro, Hiroyuki, additional, Torii, Yasuo, additional, Toyoshima, Morio, additional, Tsujikawa, Shinji, additional, Tsunesada, Yoshiki, additional, Ueda, Akitoshi, additional, Ueda, Ken-ichi, additional, Utashima, Masayoshi, additional, Wakabayashi, Yaka, additional, Yagi, Kent, additional, Yamakawa, Hiroshi, additional, Yamamoto, Kazuhiro, additional, Yamazaki, Toshitaka, additional, Yoo, Chul-Moon, additional, Yoshida, Shijun, additional, Yoshino, Taizoh, additional, and Sun, Ke-Xun, additional
- Published
- 2011
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191. Runaway domain wall and space-time varying α
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Chiba, Takeshi, primary and Yamaguchi, Masahide, additional
- Published
- 2011
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192. Prospects for direct detection of inflationary gravitational waves by next generation interferometric detectors
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Kuroyanagi, Sachiko, primary, Chiba, Takeshi, additional, and Sugiyama, Naoshi, additional
- Published
- 2011
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193. Recent change in the oceanic uptake rate of anthropogenic carbon in the North Pacific subpolar region determined by using a carbon-13 time series
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Watanabe, Yutaka W., primary, Chiba, Takeshi, additional, and Tanaka, Takayuki, additional
- Published
- 2011
- Full Text
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194. A Case of an Inappropriate Implantable Cardioverter Defibrillator Shock Delivery Coincident with a Decline in the Biventricular Pacing Rate due to T-wave Oversensing
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Sasaki, Kengo, primary, Mori, Shumpei, additional, Kanno, Hakudou, additional, Suzuki, Tomohiro, additional, Chiba, Takeshi, additional, Monma, Ryuichiro, additional, Ogoshi, Noboru, additional, Osai, Norichika, additional, Kaneko, Umihiko, additional, Takizawa, Kaname, additional, Inoue, Naoto, additional, and Meguro, Taiichiro, additional
- Published
- 2011
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195. Contribution of Automatic Wireless Remote Monitoring to the Early Detection of Arrhythmic Events
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Sasaki, Kengo, primary, Mori, Shumpei, additional, Yoshida, Keiko, additional, Kanno, Hakudou, additional, Suzuki, Tomohiro, additional, Chiba, Takeshi, additional, Monma, Ryuichiro, additional, Ogoshi, Noboru, additional, Takizawa, Kaname, additional, and Inoue, Naoto, additional
- Published
- 2011
- Full Text
- View/download PDF
196. Reheating After Quintessential Inflation and Gravitational Waves
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Tashiro, Hiroyuki, Chiba, Takeshi, Sasaki, Misao, Tashiro, Hiroyuki, Chiba, Takeshi, and Sasaki, Misao
- Abstract
We investigate the dependence of the gravitational wave spectrum from quintessential inflation on the reheating process. We consider two extreme reheating processes. One is the gravitational reheating by particle creation in the expanding universe in which the beginning of the radiation dominated epoch is delayed due to the presence of the epoch of domination of the kinetic energy of the inflaton (kination). The other is the instant preheating considered by Felder et al. in which the Universe becomes radiation dominated soon after the end of inflation. We find that the spectrum of the gravitational waves at $\sim 100$ MHz is quite sensitive to the reheating process. This result is not limited to quintessential inflation but applicable to various inflation models. Conversely, the detection or non-detection of primordial gravitational waves at $\sim$100 MHz would provide useful information regarding the reheating process in inflation., Comment: 15 pages, 5 figures, to be published in CQG
- Published
- 2003
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- View/download PDF
197. WMAP constraints on scalar-tensor cosmology and the variation of the gravitational constant
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Nagata, Ryo, Chiba, Takeshi, Sugiyama, Naoshi, Nagata, Ryo, Chiba, Takeshi, and Sugiyama, Naoshi
- Abstract
We present observational constraints on a scalar-tensor gravity theory by $\chi^2$ test for CMB anisotropy spectrum. We compare the WMAP temperature power spectrum with the harmonic attractor model, in which the scalar field has its harmonic effective potential with curvature $\beta$ in the Einstein conformal frame and the theory relaxes toward Einstein gravity with time. We found that the present value of the scalar coupling, i.e. the present level of deviation from Einstein gravity $(\alpha_0^2)$, is bounded to be smaller than $5\times 10^{-4-7\beta}$ ($2\sigma$), and $10^{-2-7\beta}$ ($4\sigma$) for $0< \beta<0.45$. This constraint is much stronger than the bound from the solar system experiments for large $\beta$ models, i.e., $\beta> 0.2$ and 0.3 in $2\sigma$ and $4\sigma$ limits, respectively. Furthermore, within the framework of this model, the variation of the gravitational constant at the recombination epoch is constrained as $|G(z=z_{rec})-G_0|/G_0 < 0.05(2\sigma)$, and $0.23(4\sigma)$., Comment: 7 pages
- Published
- 2003
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198. 1/R gravity and Scalar-Tensor Gravity
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Chiba, Takeshi and Chiba, Takeshi
- Abstract
We point out that extended gravity theories, the Lagrangian of which is an arbitrary function of scalar curvature $R$, are equivalent to a class of the scalar tensor theories of gravity. The corresponding gravity theory is $\omega=0$ Brans-Dicke gravity with a potential for the Brans-Dicke scalar field, which is not compatible with solar system experiments if the field is very light: the case when such modifications are important recently., Comment: 4 pages, to appear in PLB
- Published
- 2003
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- View/download PDF
199. Supernova Cosmology and the Fine Structure Constant
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Chiba, Takeshi, Kohri, Kazunori, Chiba, Takeshi, and Kohri, Kazunori
- Abstract
We study the dependence of the peak luminosity of Type Ia supernovae on the fine structure constant $\alpha$. We find that decreasing (increasing) $\alpha$ enhances (reduces) the luminosity. Future experiments like SNAP could determine the variation of $\alpha$ to a precision of $10^{-2}$., Comment: 6 pages
- Published
- 2003
- Full Text
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200. Baryogenesis in a flat direction with neither baryon nor lepton charge
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Chiba, Takeshi, Takahashi, Fuminobu, Yamaguchi, Masahide, Chiba, Takeshi, Takahashi, Fuminobu, and Yamaguchi, Masahide
- Abstract
We present a new mechanism of spontaneous baryogenesis. Usually such mechanisms require a derivative coupling between a scalar field and baryon current. In our model, the scalar field instead derivatively couples to a current associated with some global symmetry $U(1)_Q$. In this case, baryogenesis is still possible provided that an interaction exists, which violates the baryon and $U(1)_Q$ symmetries simultaneously. As a concrete example, we discuss baryogenesis in a flat direction with neither baryon nor lepton charge., Comment: 5 pages, no figures, to be published in Phys. Rev. Lett
- Published
- 2003
- Full Text
- View/download PDF
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