論文 - 大塚　雄一

The assessment of vertical and lateral invasion of early gastric cancer by magnifying endoscopy

Otsuka, Y; Goto, H; Niwa, Y; Ohmiya, N; Kamiya, K; Sakata, T; Ando, N; Ito, B; Sasaki, Y; Hayakawa, T

GASTROINTESTINAL ENDOSCOPY   53 巻 ( 5 ) 頁： AB212 - AB212   2001年4月

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Web of Science

The assessment of vertical and lateral invasion of early gastric cancer by magnifying endoscopy

Otsuka Y, Goto H, Niwa Y, Ohmiya N, Kamiya K, Sakata T, Ando N, Ito B, Sasaki Y, Hayakawa T

GASTROINTESTINAL ENDOSCOPY   53 巻 ( 5 ) 頁： AB212 - AB212   2001年4月

Diagnosis of gastrointestinal stromal tumor using endscopic ultrasonography-guided fine needle aspiration biopsy.

Ando, N; Goto, H; Niwa, Y; Hirooka, Y; Koijima, S; Hosoi, T; Shinkai, M; Sakata, T; Otsuka, Y; Hayakawa, T

GASTROINTESTINAL ENDOSCOPY   51 巻 ( 4 ) 頁： AB162 - AB162   2000年4月

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DOI： 10.1016/S0016-5107(00)14387-1

Web of Science

Coincident/Simultaneous Observations of Stratospheric Concentric Gravity Waves and Concentric Traveling Ionospheric Disturbances Over the Continental US in 2022 査読有り

Kogure, M; Yue, J; Chou, MY; Liu, HX; Otsuka, Y; Randall, CE; Hoffmann, L; Hozumi, Y

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   130 巻 ( 3 )   2025年3月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024JA033429

Web of Science

Multi-Event Analysis of STEVE, SAR Arc, and Red/Green Arc at Subauroral Latitudes Using Data From Ground Optical and Radio Instruments and the Arase and Van Allen Probes Satellites

Sugimura, R; Shiokawa, K; Otsuka, Y; Oyama, S; Oksanen, A; Connors, M; Kadokura, A; Poddelsky, I; Nishitani, N; Shepherd, SG; Ruohoniemi, JM; Smith, C; Spence, H; Reeves, G; Funsten, HO; Miyoshi, Y; Shinohara, I; Kasahara, Y; Tsuchiya, F; Kumamoto, A; Shinbori, A; Asamura, K; Yokota, S; Kazama, Y; Jun, CW; Wang, SY; Tam, SWY; Chang, TF; Wang, BJ; Kasahara, S; Keika, K; Hori, T; Matsuoka, A

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   130 巻 ( 2 )   2025年2月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024JA032793

Web of Science

Midlatitude Plasma Blob-like Structures Along With Super Equatorial Plasma Bubbles During the May 2024 Great Geomagnetic Storm Open Access

Sun, WJ; Li, GZ; Zhao, BQ; Zhang, SR; Otsuka, Y; Hu, LH; Dai, GF; Zhao, XK; Xie, HY; Li, Y; Liu, JF; Li, Y; Ning, BQ; Liu, LB; Shinbori, A; Nishioka, M; Perwitasari, S

GEOPHYSICAL RESEARCH LETTERS   51 巻 ( 21 )   2024年11月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024GL111638

Open Access

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Scopus

Monitoring of Ionospheric Variability Using the Low lAtitude Long Range Ionospheric raDar (LARID): Capabilities, Advantages and Limitations Open Access

Sun, WJ; Li, GZ; Ning, BQ; Hu, LH; Otsuka, Y; Dai, GF; Xie, HY; Zhao, XK; Li, Y; Shinbori, A; Nishioka, M; Perwitasari, S; Wang, C

SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS   22 巻 ( 11 )   2024年11月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024SW004134

Open Access

Web of Science

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X-Raying Neutral Density Disturbances in the Mesosphere and Lower Thermosphere Induced by the 2022 Hunga-Tonga Volcano Eruption-Explosion Open Access

Katsuda, S; Shinagawa, H; Fujiwara, H; Jin, HDKT; Miyoshi, Y; Miyoshi, Y; Motizuki, Y; Nakajima, M; Nakazawa, K; Nobukawa, KK; Otsuka, Y; Shinbori, A; Sori, T; Tao, CHR; Tashiro, MS; Wada, Y; Yamawaki, T

GEOPHYSICAL RESEARCH LETTERS   51 巻 ( 20 )   2024年10月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024GL112025

Open Access

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Scopus

Solar activity dependence for the relationship between nighttime medium-scale traveling ionospheric disturbance and sporadic E (<i>Es</i>) layer activities in summer during 1998-2019 over Japan 査読有り 国際共著 Open Access

Maheswaran, VK; Otsuka, Y; Baskaradas, JA; Devanaboyina, VR; Subramanian, S; Shinbori, A; Sori, T; Nishioka, M; Perwitasari, S

EARTH PLANETS AND SPACE   76 巻 ( 1 )   2024年6月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/s40623-024-02023-6

Open Access

Web of Science

Scopus

Regional Ionospheric Super Bubble Induced by Significant Upward Plasma Drift During the 1 December 2023 Geomagnetic Storm 査読有り 国際共著

Sun, WJ; Li, GZ; Zhang, SR; Hu, LH; Dai, GF; Zhao, BQ; Otsuka, Y; Zhao, XK; Xie, HY; Li, Y; Ning, BQ; Liu, LB; Shinbori, A; Nishioka, M; Perwitasari, S

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   129 巻 ( 6 )   2024年6月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2024JA032430

Web of Science

Scopus

Statistical Analysis of Low-Latitude Boundary of Polar-Type Medium-Scale Traveling Ionospheric Disturbances Observed by a 630-nm Airglow Imager at Nyrölä, Finland 査読有り 国際共著

Sato, M; Shiokawa, K; Oyama, S; Otsuka, Y; Shinbori, A; Oksanen, A

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   129 巻 ( 4 )   2024年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2023JA032077

Web of Science

Scopus

Performance of the double-thin-shell approach for studying nighttime medium-scale traveling ionospheric disturbances using two dense GNSS observation networks in Japan 査読有り Open Access

Fu, WZ; Otsuka, Y; Shinbori, A; Nishioka, M; Perwitasari, S

EARTH PLANETS AND SPACE   76 巻 ( 1 )   2024年1月

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/s40623-023-01956-8

Open Access

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Scopus

Statistical Analysis of Global and Regional Ionospheric Total Electron Content (TEC) Using Extreme Value Distributions 査読有り 国際共著

Emmela, S; Ratnam, DV; Otsuka, Y; Shinbori, A; Sori, T; Nishioka, M; Perwitasari, S

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING   62 巻   頁： 1 - 8   2024年

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1109/TGRS.2023.3338513

Web of Science

Statistical Analysis of the Horizontal Phase Velocity Distribution of Atmospheric Gravity Waves and Medium-Scale Traveling Ionospheric Disturbances in Airglow Images Over Sata (31.0°N, 130.7°E), Japan 査読有り

Takuma Tsuboi, Kazuo Shiokawa, Yuichi Otsuka, Hatsuki Fujinami, Takuji Nakamura

Journal of Geophysical Research: Space Physics   128 巻 ( 12 )   2023年12月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： https://doi.org/10.1029/2023JA031600

DOI： https://doi.org/10.1029/2023JA031600

Machine learning approach for ionospheric scintillation prediction on ROTI parameter over the African region during solar cycle 24 査読有り

Stephen Tete, Yuichi Otsuka, Waheed K. Zahra, Ayman Mahrous

Advances in Space Research     2023年12月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： https://doi.org/10.1016/j.asr.2023.12.026

DOI： https://doi.org/10.1016/j.asr.2023.12.026

New aspects of the upper atmospheric disturbances caused by the explosive eruption of the 2022 Hunga Tonga-Hunga Ha'apai volcano 招待有り 査読有り Open Access

Shinbori, A; Otsuka, Y; Sori, T; Nishioka, M; Septi, P; Tsuda, T; Nishitani, N; Kumamoto, A; Tsuchiya, F; Matsuda, S; Kasahara, Y; Matsuoka, A; Nakamura, S; Miyoshi, Y; Shinohara, I

EARTH PLANETS AND SPACE   75 巻 ( 1 ) 頁： 175   2023年11月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/s40623-023-01930-4

Open Access

Web of Science

Periodic oscillations of Doppler frequency excited by the traveling ionospheric disturbances associated with the Tonga eruption in 2022 査読有り Open Access

Nakata, H; Hosokawa, K; Saito, S; Otsuka, Y; Tomizawa, I

EARTH PLANETS AND SPACE   75 巻 ( 1 )   2023年10月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/s40623-023-01914-4

Open Access

Web of Science

その他リンク： https://link.springer.com/article/10.1186/s40623-023-01914-4/fulltext.html

Statistical Analysis of the Horizontal Phase Velocity Distribution of Atmospheric Gravity Waves and Medium-Scale Traveling Ionospheric Disturbances in Airglow Images Over Darwin (12.4°S, 131.0°E) 査読有り 国際共著

Takuma Tsuboi, Kazuo Shiokawa, Yuichi Otsuka, Hatsuki Fujinami, Takuji Nakamura, David Neudegg

Journal of Geophysical Research: Space Physics   128 巻 ( 8 )   2023年8月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： https://doi.org/10.1029/2022JA030769

DOI： https://doi.org/10.1029/2022JA030769

その他リンク： https://doi.org/10.1029/2022JA030769

Spatio-Temporal Characteristics of IPDP-Type EMIC Waves on April 19, 2017: Implications for Loss of Relativistic Electrons in the Outer Belt 査読有り Open Access

Hirai, A; Tsuchiya, F; Obara, T; Katoh, Y; Miyoshi, Y; Shiokawa, K; Kasaba, Y; Misawa, H; Jun, CW; Kurita, S; Connors, MG; Hendry, AT; Shinbori, A; Otsuka, Y; Tsugawa, T; Nishioka, M; Perwitasari, S; Manweiler, JW

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   128 巻 ( 8 )   2023年8月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2023JA031479

Open Access

Web of Science

Scopus

Generation of equatorial plasma bubble after the 2022 Tonga volcanic eruption 査読有り Open Access

Shinbori, A; Sori, T; Otsuka, Y; Nishioka, M; Perwitasari, S; Tsuda, T; Kumamoto, A; Tsuchiya, F; Matsuda, S; Kasahara, Y; Matsuoka, A; Nakamura, S; Miyoshi, Y; Shinohara, I

SCIENTIFIC REPORTS   13 巻 ( 1 ) 頁： 6450   2023年5月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1038/s41598-023-33603-3

Open Access

Web of Science

Scopus

PubMed