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Miyamoto, Yoichi,Umeki, Hiroyuki,Ohsawa, Hideaki,Naito, Morimasa,Nakano, Katsushi,Makino, Hitoshi,Shimizu, Kazuhiko,Seo, Toshihiro Korean Nuclear Society 2006 Nuclear Engineering and Technology Vol.38 No.6
Ensuring sufficient supplies of clean, economic and acceptable energy is a critical global challenge for the 21st century. There seems little alternative to a greatly expanded role for nuclear power, but implementation of this option will depend on ensuring that all resulting wastes can be disposed of safely. Although there is a consensus on the fundamental feasibility of such disposal by experts in the field, concepts have to be developed to make them more practical to implement and, in particular, more acceptable to key stakeholders. By considering global trends and using illustrative examples from Japan, key areas for future R&D are identified and potential areas where the synergies of international collaboration would be beneficial are highlighted.
An efficient six-node plate bending hybrid/mixed element based on mindlin/reissner plate theory
Mei, Duan,Miyamoto, Yutaka,Iwasaki, Shoji,Deto, Hideaki,Zhou, Benkuan Techno-Press 1997 Structural Engineering and Mechanics, An Int'l Jou Vol.5 No.1
A new efficient hybrid/mixed thin~moderately thick plate bending element with 6-node (HM6-14) is formulated based on the Reissner-Mindlin plate bending theory. The convergence of this element is proved by error estimate theories and verified by patch test respectively. Numerical studies on such an element as HM6-14 demonstrate that it has remarkable convergence, invariability to geometric distorted mesh situations, to axial rotations, and to node positions, and no "locking" phenomenon in thin plate limit. The present element is suitable to many kinds of shape and thin~moderately thick plate bending problems. Further, in comparison with original hybrid/mixed plate bending element HP4, the present element yields an improvement of solutions. Therefore, it is an efficient element and suitable for the development of adaptive multi-field finite element method (FEM).
Azusa Kawasaki,Kunihiro Tsuji,Noriya Uedo,Takashi Kanesaka,Hideaki Miyamoto,Ryosuke Gushima,Yosuke Minoda,Eikichi Ihara,Ryosuke Amano,Kenshi Yao,Yoshihide Naito,Hiroyuki Aoyagi,Takehiro Iwasaki,Kunihi 대한소화기내시경학회 2023 Clinical Endoscopy Vol.56 No.1
Background/Aims: The etiology of superficial non-ampullary duodenal epithelial tumors (SNADETs) remains unclear. Recent studieshave reported conflicting associations between duodenal tumor development and Helicobacter pylori infection or endoscopic gastricmucosal atrophy. As such, the present study aimed to clarify the relationship between SNADETs and H. pylori infection and/or endoscopicgastric mucosal atrophy. Methods: This retrospective case-control study reviewed data from 177 consecutive patients with SNADETs who underwent endoscopicor surgical resection at seven institutions in Japan over a three-year period. The prevalence of endoscopic gastric mucosal atrophyand the status of H. pylori infection were compared in 531 sex- and age-matched controls selected from screening endoscopies attwo of the seven participating institutions. Results: For H. pylori infection, 85 of 177 (48.0%) patients exhibited SNADETs and 112 of 531 (21.1%) control patients were non-infected(p<0.001). Non-atrophic mucosa (C0 to C1) was observed in 96 of 177 (54.2%) patients with SNADETs and 112 of 531 (21.1%)control patients (p<0.001). Conditional logistic regression analysis revealed that non-atrophic gastric mucosa was an independent riskfactor for SNADETs (odds ratio, 5.10; 95% confidence interval, 2.44–8.40; p<0.001). Conclusions: Non-atrophic gastric mucosa, regardless of H. pylori infection status, was a factor independently associated with SNADETs.