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Pedunculated Brunner's gland hamartoma of the duodenum causing upper gastrointestinal hemorrhage

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World Journal of Gastroenterology 2009年第3期15卷 373-375页

作者： Shoji Hirasaki Motoharu kubo Atsushi Inoue Yasuyuki Miyake Hisako Oshiro Department of Internal Medicine Kubo HospitalImabari 7992116Japan

A case of pedunculated Brunner＇s gland hamartoma （BGH） of the duodenum causing upper gastrointestinal （GI） hemorrhage is reported. The patient was a 47-year-old man who visited our hospital for further evaluation of tarry stools and shortness of breath. Endoscopic examination of the upper digestive tract revealed a large peduncular polyp with bleeding, about 30 mm in diameter, arising from the wall of the second portion of the duodenum. GI bleeding occurred from the base of the stalk of the polyp. Endoscopic polypectomy was performed. Histological examination of the specimen revealed that the main body of the polyp contained several Iobules of mature Brunner＇s gland with areas of cystic dilatation. The surface epithelium consisted of normal duodenal mucosa with areas of focal ulceration. This polyp was diagnosed as a BGH. The symptom of tarry stools resolved after endoscopic resection. Our case shows that treatment is necessary for duodenal BGH if GI bleeding occurs.

关键词： Brunner's gland Hyperplasia Duodenalpolyp Endoscopic polypectomy Gastrointestinal bleeding

Precision Synthesis of End-Functionalized Star Poly(vinyl alcohol)s by RAFT Polymerization and Post-polymerization Modification

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Precision Chemistry 2023年第4期1卷 256-263页

作者： Gaishi Murakami Tomohiro kubo Kotaro Satoh Department of Chemical Science and Engineering Tokyo Institute of TechnologyMeguro-kuTokyo 152-8550Japan

Poly(vinyl alcohol)(PVA)has been widely used in industrial and consumer *** this study,we aimed to address this challenge by synthesizing well-defined multiarm poly(vinyl acetate)(PVAc)through the use of nonhydrolyzable vinyl ethertype multifunctional RAFT *** control over molecular weights was achieved by the RAFT process to afford polymers with dominant head-to-head linkages at the ***,quantitative end-functionalization of the synthesized PVAc was performed using Michael thiol−ene or disulfide exchange ***,saponification of the PVAc enabled the synthesis of end-functionalized multiarm PVA in an efficient *** straightforward approach afforded well-defined functional PVAs,which enable further chemical modification,thus widening the utility of PVA in a range of applications,such as precisely controlled network synthesis and bioconjugation.

关键词： Poly(vinyl alcohol) Poly(vinyl acetate) RAFT Polymerization Star Polymers End-Functional Polymers Michael Thiol-Ene Reaction

Continual few-shot patch-based learning for anime-style colorization

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Computational Visual Media 2024年第4期10卷 705-723页

作者： Akinobu Maejima Seitaro Shinagawa Hiroyuki kubo Takuya Funatomi Tatsuo Yotsukura Satoshi Nakamura Yasuhiro Mukaigawa The Research and Development Division OLM DigitalInc.Advanced Research GroupIMAGICA GROUPTokyo 1540023Japan Division of Information Science Graduate School of Science and TechnologyNara Institute of Science and TechnologyNara 6300192Japan Graduate School of Informatics Chiba UniversityChiba 2638522Japan

The automatic colorization of anime line drawings is a challenging problem in production *** advances in deep neural networks have addressed this problem;however,collectingmany images of colorization targets in novel anime work before the colorization process starts leads to chicken-and-egg problems and has become an obstacle to using them in production *** overcome this obstacle,we propose a new patch-based learning method for few-shot anime-style *** learning method adopts an efficient patch sampling technique with position embedding according to the characteristics of anime line *** also present a continuous learning strategy that continuously updates our colorization model using new samples colorized by human *** advantage of our method is that it can learn our colorization model from scratch or pre-trained weights using only a few pre-and post-colorized line drawings that are created by artists in their usual colorization ***,our method can be easily incorporated within existing production *** quantitatively demonstrate that our colorizationmethod outperforms state-of-the-art methods.

关键词： anime colorization few-shot learning continuous learning strategy

A Remark on the Courant-Friedrichs-Lewy Condition in Finite Difference Approach to PDE’s

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Advances in Applied Mathematics and Mechanics 2014年第5期6卷 693-698页

作者： Kosuke Abe Nobuyuki Higashimori Masayoshi kubo Hiroshi Fujiwara Yuusuke Iso Nihon University TokyoJapan Hitotsubashi University KunitachiJapan Graduate School of Informatics Kyoto UniversityKyotoJapan

The Courant-Friedrichs-Lewy condition(The CFL condition)is appeared in the analysis of the finite difference method applied to linear hyperbolic partial differential *** give a remark on the CFL condition from a view point of stability,and we give some numerical experiments which show instability of numerical solutions even under the CFL *** give a mathematical model for rounding errors in order to explain the instability。

关键词： Numerical analysis finite difference scheme stability CFL condition

Synthesis and Properties of a Through-Space Interacting Diradicaloid

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Precision Chemistry 2023年第3期1卷 183-191页

作者： Takuya Kodama Yasukazu Hirao Takashi kubo Department of Chemistry Graduate School of ScienceOsaka UniversityToyonakaOsaka 560-0043Japan Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives(ICSOTRI)Osaka UniversitySuitaOsaka 565-0871Japan

Knowledge about electronic structures is important to gain an understanding of the unique functional properties of *** this study,we synthesized and characterized a diradicaloid in which two phenalenyl radical sites are coupled antiferromagnetically via a through-space *** results of quantum chemical,physicochemical(^(1)H NMR,electronic absorption,cyclic voltammetry,SQUID,ESR),and chemical reactivity studies show that this diradicaloid has singlet diradical *** assessment of the nature of the bonding interaction between two radical sites in this species using DFT calculations demonstrates that a small spatial overlap between the two SOMOs in this diradicaloid provides an efficient electron exchange path for the singlet state to be substantially lower in energy than the triplet state.

关键词： through-space interaction phenalenyl radical singlet diradical diradicaloid antiferromagnetic interaction

Synthesis and mesomorphic properties of 4-(4-bromopropyloxy)-4'-(4-alkyloxybenzylidene)anilines

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Chinese Chemical Letters 2012年第7期23卷 769-772页

作者： Guan-Yeow Yeap Yew-Hong Ooi Kenji kubo Masato M.Ito Liquid Crystal Research Laboratory School of Chemical SciencesUniversiti Sains Malaysia11800 MindenPenangMalaysia Department of Environmental Engineering for Symbiosis Faculty of EngineeringSoka UniversityTokyo 192-8577Japan

This article describes the preparation and liquid crystalline properties of a new homologous series of 4-（4-bromopropyloxy）-4＇- （4-alkyloxybenzylidene）anilines in which the phenyl ring is armed by a bromopropyloxy *** thermal behavior and mesomorphic properties of the synthesized compounds were studied with particular attention given to the correlation between their phase transition temperatures and anisotropic change influenced by molecular *** the members displayed enantiotropic smectic phase except for the homologue with the longest alkyloxy chain（R = C_（18）H_（37））,exhibiting only monotropic characteristic. The presence of bromine atom from the propyloxy side chain is found to be capable of altering and influencing the mesomorphic properties.

关键词： 4-(4-Bromopropyloxy)-4'-(4-alkyloxybenzylidene)anilines Mesomorphic properties Enantiotropic smectic DSC

Direct imaging of the near field and dynamics of surface plasmon resonance on gold nanostructures using photoemission electron microscopy

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Light(Science & Applications) 2013年第1期2卷 1-8页

作者： Quan Sun Kosei Ueno Han Yu Atsushi kubo Yasutaka Matsuo Hiroaki Misawa Research Institute for Electronic Science Hokkaido UniversitySapporo 001-0021Japan Creative Research Institution Hokkaido UniversitySapporo 001-0021Japan PRESTO Japan Science and Technology AgencyKawaguchi 332-0012Japan Institute of Physics University of TsukubaTsukuba 305-8571Japan

Localized surface plasmon resonance(LSPR)can be supported by metallic nanoparticles and engineered *** understanding of the spatially resolved near-field properties and dynamics of LSPR is important,but remains experimentally *** report experimental studies toward this aim using photoemission electron microscopy(PEEM)with high spatial resolution of sub-10 *** engineered gold nanostructure arrays(such as rods,nanodisk-like particles and dimers)are investigated via PEEM using near-infrared(NIR)femtosecond laser pulses as the excitation *** the LSPR wavelengths overlap the spectrum of the femtosecond pulses,the LSPR is efficiently excited and promotes multiphoton photoemission,which is correlated with the local intensity of the metallic nanoparticles in the near ***,the local field distribution of the LSPR on different Au nanostructures can be directly explored and discussed using the PEEM *** addition,the dynamics of the LSPR is studied by combining interferometric time-resolved pump-probe technique and *** information on the oscillation and dephasing of the LSPR field can be *** results identify PEEM as a powerful tool for accessing the near-field mapping and dynamic properties of plasmonic nanostructures.

关键词： femtosecond laser local field enhancement near-field imaging photoemission electron microscopy surface plasmon resonance

Optical nature of non-substituted triphenylmethyl cation:Crystalline state emission,thermochromism,and phosphorescence

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Aggregate

Aggregate 2021年第6期2卷 99-108页

作者： Tomohiko Nishiuchi Hikaru Sotome Risa Fukuuchi Kenji Kamada Hiroshi Miyasaka Takashi kubo Department of Chemistry Graduate School of ScienceOsaka UniversityToyonakaOsakaJapan Innovative Catalysis Science Division Institute for Open and Transdisciplinary Research Initiatives(ICS-OTRI)Osaka UniversitySuitaOsakaJapan Division of Frontier Materials Science and Center for Advanced Interdisciplinary Research Graduate School of Engineering ScienceOsaka UniversityToyonakaOsakaJapan Nanomaterial Research Institute(NMRI) National Institute of Advanced Industrial Science and Technology(AIST)IkedaOsakaJapan Department of Chemistry Graduate School of Science and TechnologyKwansei Gakuin UniversitySandaHyogoJapan

Since the discovery of the triphenylmethyl(trityl)cation 120 years ago,a variety of aromatic cations having various colors and luminescence properties have been rigorously ***,differently substituted trityl cations have been synthesized,and their optical properties have been ***,the optical properties of the parent,non-substituted and highly reactive trityl cation,which was observed to be very weakly luminescent,have not been subjected to detailed *** the effort described herein,we explored the optical nature of non-substituted trityl hexafluorophosphate(PF_(6))in the crystalline *** PF_(6) was found to exist as two crystal polymorphs including a yellow(Y)and an orange(O)***,we observed that these crystalline forms display crystalline-state emission with different *** results of X-ray crystallographic analysis showed that the two polymorphs have totally different molecular packing ***,an investigation of their optical properties revealed that the O-crystal undergoes a distinct color change to yellow upon cooling as a consequence of a change in the nature of the charge transfer interaction between the cation and PF6 anion,and that both the Y-and O-crystal exhibit phosphorescence.

关键词： aggregation induced emission carbocation phosphorescence crystal phase transition thermochromism

Influence of shock absorber condition on pavement fatigue using relative damage concept

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第6期2卷 406-413页

作者： Pablo kubo Cassio Paiva Adelino Ferreira Arthur Larocca Department of Civil Engineering State University of Campinas Department of Civil Engineering University of Coimbra Department of Engineering Alpha Servicos de Assessoria Tecnica Ltda

Considering the importance of the road transportation nowadays, concerns related to pavement deterioration and maintenance have become relevant subjects. Especially for commercial vehicles, the vertical dynamic load （characterized by the tire-road interaction） is directly related to wear on the road surface. Given this, the main objective of this paper is to analyse effects of vertical loads applied on the flexible pavement, considering the variation of the condition of shock absorbers from a truck＇s front suspension. The mea- surements were performed on a rigid truck, with 2 steering front axles, in a durability test track located in Brazil. With a constant load of 6 tons on the front suspension （the maximum allowed load on front axles according to Brazilian legislation）, 3 different shock absorber conditions were evaluated： new, used and failed. By applying the relative damage concept, it is possible to conclude that the variation of the shock absorber conditions will significantly affect the vertical load applied on the pavement. Although the results clearly point to a dependent relationship between the load and the condition of the shock ab- sorbers, it is recommended to repeat the same methodology, in future to analyse the influence of other quarter car model variants （such as spring rate, mass and tire spring stiffness）.

关键词： Vertical load Pavement Relative damage Shock absorber