Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Toshihiro Oh"'
Autor:
Yusuke Kumazaki, Shiro Ozaki, Naoya Okamoto, Naoki Hara, Yasuhiro Nakasha, Masaru Sato, Toshihiro Ohki
Publikováno v:
IEEE Journal of the Electron Devices Society, Vol 12, Pp 965-973 (2024)
This paper demonstrated high-output-power and high-efficiency power amplifier (PA) monolithic microwave-integrated circuit (MMIC) at 300-GHz band (252–296 GHz) with the use of InPbased metal–oxide–semiconductor high-electron-mobility transistor
Externí odkaz:
https://doaj.org/article/74698a919443403894f8fa8759ab55b2
Autor:
Junji Kotani, Junya Yaita, Kenji Homma, Shirou Ozaki, Atsushi Yamada, Masaru Sato, Toshihiro Ohki, Norikazu Nakamura
Publikováno v:
IEEE Journal of the Electron Devices Society, Vol 11, Pp 101-106 (2023)
This paper reports on an AlGaN/GaN high-electron-mobility transistor (HEMT) on free-standing AlN substrates with a record-high output power density of 24.4 W/mm at the X-band. A high-drain current operation of 1.4 A/mm was realized by employing high-
Externí odkaz:
https://doaj.org/article/579d0f3250cb4141af3604f80d5ed5d0
Publikováno v:
Journal of Pediatric Surgery Case Reports, Vol 95, Iss , Pp 102670- (2023)
Introduction: Recurrent tracheoesophageal fistula (RTEF) after surgical repair of esophageal atresia remains a serious complication. Open surgical repair for RTEF is associated with high levels of postoperative morbidity, mortality and repeat recurre
Externí odkaz:
https://doaj.org/article/38696699114541d78d0e955dc896799b
Autor:
Yusuke Kumazaki, Shiro Ozaki, Yasuhiro Nakasha, Naoya Okamoto, Atsushi Yamada, Toshihiro Ohki
Publikováno v:
Applied Physics Express, Vol 17, Iss 8, p 086504 (2024)
This study describes high-power and high-efficiency W-band InAlGaN/AlN/GaN high-electron-mobility transistors (HEMTs) for future sub-terahertz wireless communications. A low-thermal-budget selective-area growth (SAG) process was developed to obtain l
Externí odkaz:
https://doaj.org/article/f48ba22100a04f2aad0f2c84cc53a687
Publikováno v:
Journal of Cardiothoracic Surgery, Vol 17, Iss 1, Pp 1-8 (2022)
Abstract Objective Mitral valve (MV) repair is a well-accepted surgical approach for infective endocarditis (IE). In our hospital, extensive MV reconstruction with fresh autologous pericardium (AP) and artificial chordae (AC) has been performed for p
Externí odkaz:
https://doaj.org/article/183ac61752de46bb8e7ca2846ccf885a
Autor:
Junji Kotani, Kozo Makiyama, Toshihiro Ohki, Shiro Ozaki, Naoya Okamoto, Yuichi Minoura, Masaru Sato, Norikazu Nakamura, Yasuyuki Miyamoto
Publikováno v:
Electronics Letters, Vol 59, Iss 4, Pp n/a-n/a (2023)
Abstract This paper investigated the back‐barrier (BB) effect for gallium nitride (GaN)‐based high‐electron‐mobility transistors with an Fe‐doped buffer and Fe‐buffer + Indium gallium nitride (InGaN)‐BB structure. The authors found that
Externí odkaz:
https://doaj.org/article/e884dbfc5aef45eea2bf03ce48d6a2f8
Autor:
Ryosuke Shibata, Marina Morishita, Nobuhiko Koreeda, Yousuke Hirano, Hiroki Kaida, Toshihiro Ohmiya, Shugo Uwatoko, Makoto Kawamoto, Akira Komono, Ryohei Sakamoto, Yoshihiro Miyasaka, Daijiro Higashi, Hiroshi Tanabe, Satoshi Nimura, Masato Watanabe
Publikováno v:
Surgical Case Reports, Vol 7, Iss 1, Pp 1-8 (2021)
Abstract Background Primary gastric synovial sarcoma is extremely rare, only 44 cases have been reported so far, and there have been no reports of laparoscopic endoscopic cooperative surgery for this condition. Case presentation A 45-year-old male pa
Externí odkaz:
https://doaj.org/article/3577394dcc024426a42e6a2552cdc74c
Publikováno v:
Orthopedics & Traumatology. 45:339-343
From 1986 to 1995, 256 patients who had an ACL injury were operated on in our hospital. We investigated ACL injury mechanism in these patients. We examined the relationship between the position of the knee joint and the derection of force when the AC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c9e1f1d5f61f5ce61df1b9094d11688
https://doi.org/10.5035/nishiseisai.45.339
https://doi.org/10.5035/nishiseisai.45.339
Publikováno v:
Orthopedics & Traumatology. 45:374-379
Thirty-seven patients who had a corrective osteotomy for cubitus varus were reviewed. The age at injury ranged 1 to 9 years. Twelve cases were below 3 years of age. Primary fractures were supracondylar fracture of the humerus in 27, diacondylar fract
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e468908b5e06b0438ee3c5bca8022da7
https://doi.org/10.5035/nishiseisai.45.374
https://doi.org/10.5035/nishiseisai.45.374
Publikováno v:
Orthopedics & Traumatology. 44:82-88
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7668bb00494f379e61c84b6329c046c4
https://doi.org/10.5035/nishiseisai.44.82
https://doi.org/10.5035/nishiseisai.44.82