H
Hiroshi Yoshida
Researcher at Tohoku University
Publications - 222
Citations - 3837
Hiroshi Yoshida is an academic researcher from Tohoku University. The author has contributed to research in topics: Signal & Amplifier. The author has an hindex of 31, co-authored 219 publications receiving 3698 citations. Previous affiliations of Hiroshi Yoshida include Toshiba.
Papers
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Journal ArticleDOI
A 950-MHz rectifier circuit for sensor network tags with 10-m distance
TL;DR: In this article, the authors presented a 950-MHz wireless power transmission system and a high-sensitivity rectifier circuit for ubiquitous sensor network tags, which offers a battery-life-free sensor tag by recharging the output power of a base station into a secondary battery implemented with the tag.
Journal ArticleDOI
Isolation and structural elucidation of new cyclotetrapeptides, trapoxins A and B, having detransformation activities as antitumor agents.
Hiroshi Itazaki,Kazuo Nagashima,Kenji Sugita,Hiroshi Yoshida,Yoshimi Kawamura,Yukio Yasuda,Koichi Matsumoto,Kikuo Ishii,Nobuo Uotani,Hiroshi Nakai,Akihiro Terui,Shinya Yoshimatsu,Yuji Ikenishi,Yuzo Nakagawa +13 more
TL;DR: New cyclotetrapeptides, trapoxins A and B were isolated from the culture broth of Helicoma ambiens RF-1023 and exhibit detransformation activities against v-sis oncogene-transformed NIH3T3 cells (sis/NIH 3T3) as antitumor agents.
Patent
Cognitive radio system
TL;DR: In this article, a cognitive radio system includes a state detecting device that scans a frequency band allocated to another radio system than the CR system to detect a first use state of the frequency band; a first server including a first gathering unit that receives first information relating to the first use-state and a second gathering unit; a second server that stores a second use-State of the spectrum allocated to the other radio system; and a notifying unit that notifies a CR system of information of an available channel based on the first information and the second information.
Journal ArticleDOI
Cerebrospinal Fluid Amyloid β1–42 Levels in the Mild Cognitive Impairment Stage of Alzheimer's Disease
Masahiro Maruyama,Hiroyuki Arai,Mitsunori Sugita,Haruko Tanji,Makoto Higuchi,Nobuyuki Okamura,Toshifumi Matsui,Susumu Higuchi,Sachio Matsushita,Hiroshi Yoshida,Hidetada Sasaki +10 more
TL;DR: CSF-tau and CSF-A beta(1-42) must be used as two distinct biomarkers that should be applied appropriately in clinical settings to help in detecting MCI subjects who are predicted to develop AD.
Journal ArticleDOI
Impact of nodal involvement on surgical outcomes of intrahepatic cholangiocarcinoma: a multicenter analysis by the Study Group for Hepatic Surgery of the Japanese Society of Hepato-Biliary-Pancreatic Surgery.
Kazuhisa Uchiyama,Masakazu Yamamoto,Hiroki Yamaue,Shunichi Ariizumi,Taku Aoki,Norihiro Kokudo,Tomoki Ebata,Masato Nagino,Masayuki Ohtsuka,Masaru Miyazaki,Eiichi Tanaka,Satoshi Kondo,Takahiro Uenishi,Shoji Kubo,Hiroshi Yoshida,Michiaki Unno,Satoru Imura,Mitsuo Shimada,Masaki Ueno,Tadahiro Takada +19 more
TL;DR: Preoperative carbohydrate antigen (CA) 19-9, intrahepatic metastasis, and nodal involvement were the significant independent predictors of poor prognosis by multivariate analysis.