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Angle-Resolved Photoemission Spectroscopy on Mixed-Valent Sm1−xYxS
Keiichiro Imura,Tetsuya Hajiri,Masaharu Matsunami,Shin-ichi Kimura,Masaki Kaneko,Takahiro Ito,Yusuke Nishi,Noriaki K. Sato,Hiroyuki S. Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We report the results of angle-resolved photoemission spectroscopy (ARPES) on the Sm1−xYxSsystem, which exhibits a black-to-golden phase transition induced by yttrium substitution and by anapplied external pressure, in order to investigate the mechanism of this transition and the electronicstructure of both phases. The obtained ARPES spectrum of pure SmS (x = 0) indicates a bandinsulator, in which the shallowest electronic state is the Sm2+ 4f state at a binding energy of about0.4 eV. With increasing x, the top of the Sm2+ 4f band shifts to the lower binding energy side andtouches the Fermi level for x = 0.33. Because of the discontinuous reduction of the lattice constantin the vicinity of the black-to-golden phase transition (x 0.17), the golden phase induced byyttrium substitution is concluded to be an intermediate valence state.
Yoshihide Kanno,Tetsuya Ohira,Yoshihiro Harada,Yoshiki Koike,Taku Yamagata,Megumi Tanaka,Tomohiro Shimada,Kei Ito 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.3
Afferent loop syndrome is often difficult to resolve. Among patients with afferent loop syndrome whose data were extracted fromdatabases, 5 patients in whom metal stent placement was attempted were included and evaluated in this study. The procedure wastechnically successful without any adverse events in all patients. Metal stent(s) was placed with an endoscope in the through-the-scopemanner in 4 patients and via a percutaneous route in 1 patient. Obvious clinical efficacy was observed in all patients. Adverse eventsrelated to the procedure and stent occlusion during the follow-up period were not observed. Metal stent placement for malignantobstruction of the afferent loop was found to be safe and feasible.
Hwang, Chul-Min,Ishida, Masayoshi,Ito, Hiroshi,Maeda, Tetsuhiko,Nakano, Akihiro,Kato, Atsushi,Yoshida, Tetsuya The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.2
Polymer electrolyte-based unitized reversible fuel cells (URFCs) combine the functionality of a fuel cell and an electrolyzer in a single device. In this study, the influence of hydrophobic agent in the gas diffusion layer (GDL) of URFC was investigated. The titanium (Ti)-felt GDL which treated with different percent of PTFE emulsion was intensively tested with various humidification temperature conditions in the single cell of URFC. I-V performance curves and divided three overpotentials were compared and analyzed in the fuel cell mode. The electrolyzer performances were also evaluated with the I-V curves. Experimental results showed that the GDLs with high PTFE contents have better performance in the dry conditions. On the other hand, the increased PTFE contents accelerate flooding problem in the wet condition and it is related with rising concentration overpotential. The electrolyzer performances are almost same with different PTFE contents of GDL.
Aina Kunitomo,Kazunari Misawa,Yuichi Ito,Seiji Ito,Eiji Higaki,Seiji Natsume,Takashi Kinoshita,Tetsuya Abe,Koji Komori,Yasuhiro Shimizu 대한위암학회 2021 Journal of gastric cancer Vol.21 No.4
Purpose: Type 4 gastric cancer (GC) has a very poor prognosis even after curative resection, and the survival benefit of splenectomy for splenic hilar lymph node (LN; #10) dissection in type 4 GC remains equivocal. This study aimed to clarify the clinical significance of splenectomy for #10 dissection in patients with type 4 GC. Materials and Methods: The data of a total of 56 patients with type 4 GC who underwent total gastrectomy with splenectomy were retrospectively analyzed. Postoperative morbidity, state of LN metastasis, survival outcomes, and therapeutic value index (TVI) of each LN station were evaluated. TVI was calculated by multiplying the incidence of LN metastasis at each nodal station and the 5-year overall survival (OS) of patients who had metastasis to each node. Results: Overall, the postoperative morbidity rate was 28.6%, and the incidence of #10 metastasis in the patients was 28.6%. The 5-year OS rate for all patients was 29.9%, and most patients developed peritoneal recurrence. Moreover, the 5-year OS rates with and without #10 metastasis were 6.7% and 39.1% (median survival time, 20.4 vs. 46.0 months; P=0.006). The TVI of #10 was as low as 1.92. Conclusions: The clinical significance of splenectomy in the dissection of #10 for type 4 GC is limited and splenectomy for splenic hilar dissection alone should be omitted.