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Similar Subgraph Retrieving for Japanese Historical Document Search System
Hiroaki Nagaoka,Mitsuru Nakata,Qi-Wei Ge,Makoto Yoshimura 대한전자공학회 2015 ITC-CSCC :International Technical Conference on Ci Vol.2015 No.6
In this paper, we propose a retrieval method of similar subgraphs in order to obtain similar partial images used in Japanese historical documents image retrieval system. In our system, the structure of characters is represented by a feature graph, and the structure of a string of each line of Japanese historical documents is stored as a feature graph which is called “document graph”. The structure of a string to be searched is specified as a feature graph that is called “search graph”. A search graph contains an “essential graph”, which shows an indispensable structure included in search results. The processes to search similar partial images are as follows: (1) get subgraphs of document graphs that are isomorphic to the essential graph, and construct candidates of search result from these subgraphs; (2) remove improper candidates based on some conditions; (3) calculate the similarities between remaining candidates and the search graph (these remaining candidates are called “similar subgraph”); (4) clip the partial areas as the search results, which correspond to similar subgraphs with high similarity from Japanese historical document images.
Edalati, Kaveh,Lee, Dong Jun,Nagaoka, Takashi,Arita, Makoto,Kim, Hyoung Seop,Horita, Zenji,Pippan, Reinhard JAPAN INSTITUTE OF METALS 2016 MATERIALS TRANSACTIONS Vol.57 No.4
<P>Hydrostatic pressure is a significant parameter influencing the evolution of microstructure and phase transformations in the high-pressure torsion (HPT) process. Currently, there are significant arguments relating to the magnitude of the real hydrostatic pressure during the process. In this study, phase transformations in bismuth, copper and titanium combined with the finite element method (FEM) were employed to determine the real pressure in processing disc samples by HPT. Any break in the variation of steady-state hardness (monitored experimentally by in-situ torque and temperature rise measurements) versus pressure was considered as a phase transition. FEM simulations show that the hydrostatic pressure is reasonably isotropic but decreases with increasing distance from the disc center and remains unchanged across the disc thickness. Both experiments and simulations indicate that the mean hydrostatic pressure during HPT processing closely corresponds to the compressive load over the disc area plus the contact area between the anvils.</P>
Effectiveness of Solution with 5% Detergent for Cleaning Transnasal Esophagogastroduodenoscopy Lens
Yoshinori Komazawa,Mika Yuki,Nobuhiko Fukuba,Yoshiya Kobayashi,Hitomi Ishitobi,Sayaka Nakashima,Makoto Nagaoka,Yoshiko Takahashi,Toshihiro Shizuku 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.2
Background/Aims: Unsedated transnasal esophagogastroduodenoscopy (EGD) is affected by a poor scope lens-cleaning function. We have previously reported good, albeit limited, effects of an oolong tea washing solution; here, we evaluated the effectiveness of a 5%lens cleaning solution for cleaning an EGD lens. Methods: Five percent lens cleaning solution (C), 5% dimethicone solution (D), and distilled water (W) were prepared. Study I:Lenses were soiled with pork grease, washed with each washing solution, and their image quality was judged. Study II: Patients (n=996)scheduled for transnasal EGD were randomly assigned to the C- or W-group. Lens cleanliness level, washing solution volume used,and endoscopist stress due to lens contamination were determined. Results: Study I: The image quality of the lenses washed with (C) was significantly superior. (D) was clinically unsuitable because ofspray nozzle clogging. Study II: Lens cleaning in the C-group was significantly superior (p<0.0001) and the solution volume requiredwas significantly reduced (p<0.0001), while endoscopist stress was also lower (p<0.0001). Conclusions: For transnasal small-caliber EGD, the present 5% lens cleaning solution provided good visibility. It features a highdetergency level and is simple to formulate for therapeutic endoscopy applications, such as endoscopic submucosal dissection.