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Greater omentum gastrointestinal stromal tumor with PDGFRA-mutation and hemoperitoneum

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World Journal of Gastrointestinal Oncology 2012年第5期4卷 119-124页

作者： yoko murayama Masayuki Yamamoto Ryuichiro Iwasaki Tamana Miyazaki Yukiko Saji Yoshinori Doi Haruki Fukuda Seiichi Hirota Masahiro Hiratsuka Department of Gastroenterology and Hepatology Itami City HospitalItami 6648540Japan Department of Surgery Itami City HospitalItami 6648540Japan Department of Gastroenterology and Hepatology Otemae HospitalOsaka 5400008Japan Department of Pathology Itami City HospitalItami 6648540Japan Department of Surgical Pathology Hyogo College of MedicineNishinomiya 6638501Japan

Although gastrointestinal stromal tumor(GIST) occurs generally in the digestive tract,omental GIST is very *** report the first case of an adult greater omental GIST with a new platelet-derived growth factor receptor α gene(PDGFRA)-mutation with hemoperitoneum.A 43-year-old man was admitted to our hospital complaining of acute abdominal *** contrast-enhanced computed tomography revealed a huge mass in the right abdominal cavity,and a large accumulation of fluid in the pelvic cavity,suggesting *** diagnosed the rupture as an intra-abdominal tumor,and an emergency tumorectomy was performed with resection of the greater *** tumor was located in the distal right side ofthe greater omentum,and showed no continuity with the gastric *** tumor occurred primarily in the greater *** resected tumor was about 19 cm × 12 cm × 14 cm in diameter,and weighed 1529 ***,the tumor was composed of epithelioidshaped cells with high cellularity,and was positive for CD117 and CD34,and negative for S-100,α-smooth muscle *** mitosis was 6/50 under high power *** case showed exon 18 mutation of PDGFRA with 846(Asp to Glu) substitution,848(Asn to Lys) *** is the first report of this PDGFRA mutation in omental GIST,and this might play an important role in the tumorigenesis of this *** on these findings,the tumor was diagnosed as high risk GIST primarily occurring in the greater *** patient was treated with imatinib at a dose of 400 mg/d as adjuvant chemotherapy,and has been followed up for 24 mo with no evidence of recurrence.

关键词： Gastrointestinal stromal tumor Greater omentum Hemoperitoneum Platelet-derived growth factor receptor α gene KIT

Capillary method for measuring near-infrared spectra of microlitre volume liquids

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 171-175页

作者： YUAN Bo murayama Koichi Department of Information Science and Optoelectronic Engineering State Key Laboratory of Modern Optical Instrumentation CNERC for Optical Instrument Zhejiang University Hangzhou 310027 China Department of Biochemistry and Biophysics Gifu University School of Medicine Gifu 500-8705 Japan

The present study theoretically explored the feasibility of the capillary method for measuring near-infrared (NIR) spectra of liquid or solution samples with microlitre volume, which was proposed in our previous studies. Lambert-Beer absorb- ance rule was applied to establish a model for the integral absorbance of capillary, which was then implemented in numerical analyses of the effects of capillary on various spectral features and dynamic range of absorption measurement. The theoretical speculations indicated that the capillary method might be used in NIR spectroscopy, which was further supported by the empirical data collected from our experiments by comparison between capillary NIR spectra of several organic solvents and cuvette cell NIR spectra.

关键词： Near-infrared (NIR) spectroscopy Capillary Cuvette cell Numerical analysis

A comparative study of land price estimation and mapping using regression kriging and machine learning algorithms across Fukushima prefecture,Japan

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Journal of Geographical Sciences 2020年第5期30卷 794-822页

作者： DERDOURI Ahmed murayama Yuji Division of Spatial Information Science Graduate School of Life and Environmental SciencesUniversity of TsukubaTennodaiTsukubaIbarakiJapan Faculty of Life and Environmental Sciences University of TsukubaTennodaiTsukubaIbarakiJapan

Finding accurate methods for estimating and mapping land prices at the macro-scale based on publicly accessible and low-cost spatial data is an essential step in producing a meaningful reference for regional *** asset would assist them in making economically justified decisions in favor of key investors for development projects and post-disaster recovery *** 2005,the Ministry of Land,Infrastructure,and Transport of Japan has made land price data open to the public in the form of observations at dispersed *** this data is useful,it does not provide complete information at every site for all market ***,estimating and mapping land prices based on sound statistical theories is *** paper presents a comparative study of spatial prediction of land prices in 2015 in Fukushima prefecture based on geostatistical methods and machine learning *** use,elevation,and socioeconomic factors,including population density and distance to railway stations,were used for *** show the superiority of the random forest ***,land prices are distributed unevenly across the prefecture with the most expensive land located in the western region characterized by flat topography and the availability of well-connected and highly dense economic hotspots.

关键词： land price spatial estimation kriging machine learning Fukushima prefecture,Japan

A case of congenital aneurysm of the ulnar artery of the palm

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Plastic and Aesthetic Research 2020年第1期7卷 17-23页

作者： yoko Kishi Department of Pediatric Surgery Dokkyo Medical University Saitama Medical CenterSaitama 343-8555Japan.

Congenital aneurysms of the palm are uncommon in the pediatric population compared to aneurysms in adults.A seven-month-old boy presented with a true aneurysm of the ulnar artery with reconstruction with surgical excision and end-to-end microvasculer anastomosis using a superficial vein of the dorsal *** our knowledge,there have been only 15 reports of congenital aneurysms of the palm.

关键词： Congenital aneurysm of the palm ulnar artery microvascular reconstruction

Grain size altering yielding mechanisms in ultrafine grained high-Mn austenitic steel:Advanced TEM investigations

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Journal of Materials Science & Technology 2021年第27期86卷 192-203页

作者： Chang-Yu Hung Yu Bai Nobuhiro Tsuji Mitsuhiro murayama Department of Materials Science and Engineering Virginia TechBlacksburgVA24061USA Department of Materials Science and Engineering Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Elements Strategy Initiative for Structural Materials Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Institute for Materials Chemistry and Engineering Kyushu UniversityKasugaFukuoka8168580Japan

The underlying mechanism of discontinuous yielding behavior in an ultrafine-grained(UFG)Fe-31 Mn-3 Al-3 Si(wt.%)austenitic TWIP steel was investigated by the use of advanced TEM technique with taking the plastic deformation mechanisms and their correlation with grains size near the macroscopic yield point into *** yield drop mechanisms such as the dislocation locking by the Cottrell atmosphere due to the presence of interstitial impurities cannot explain the origin of this phenomenon in the UFG high-Mn austenitic TWIP ***,we experimentally revealed that the plastic deformation mechanisms in the early stage of deformation,around the macroscopic yield point,show an obvious association with grain *** specifically,the main mechanism shifts from the conventional slip in grain interior to twinning nucleated from grain boundaries with decreasing the grain size down to less than 1μ*** observation indicates that the grain size dependent deformation mechanisms transition is also deeply associated with the discontinuous yielding behavior as it could govern the changes in the grain interior dislocation density of mobile dislocations around the macroscopic yield point.

关键词： Ultrafine grains TWIP steel Yield-drop phenomenon Deformation twin nucleation Structural defects Transmission electron microscopy

Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

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Frontiers of Structural and Civil Engineering 2016年第1期10卷 93-102页

作者： Hiroshi KATSUCHI Hitoshi YAMADA Mayuko NISHIO yoko OKAZAKI Department of Civil Engineering Yokohama National University Yokohama 240-8501 Japan

Wind-tunnel study on the improvement of aerodynamic stability of simplified suspension-bridge girder structures was conducted with using a 1/40-scaled section model. Objective of the study is the development of an economically superior suspension bridge with 500-1,000 m center span length. The wind-tunnel test showed that an edge-girder type cross section exhibited large amplitude torsional vortex-induced vibration as well as torsional flutter at a low wind speed. Accordingly, aerodynamic countermeasures of open grating deck and triangular fating, and structural countermeasures of center stay, diagonal bracing and mass increase were tried to improve the aerodynamic stability. Finally, feasibility of the best combination to a full-scale bridge was examined by structural analysis.

关键词： suspension bridge aerodynamics simplified girder wind-tunnel test

Carbonation of low heat portland cement paste precured in water for different time

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Journal of University of Science and Technology Beijing 2007年第2期14卷 178-184页

作者： Deping Chen Etsuo Sakai Masaki Daimon yoko Ohba Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China Graduate School of Science and Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan

The carbonation technique was applied to accelerate the hydration of low heat portland cement （LHC）. Before carbonation, the demoulded pastes were precured in water for 0, 2, 7, and 21 d, respectively. The results show that precuring time in water strongly influences the carbonation process. The phenolphthalein test indicates that the paste precured in water for a shorter time is more quickly carbonated than that for a longer time. The content of calcium hydroxide increases with increasing the precuring time in water, whereas, the amount of absorbed carbon dioxide changes contrarily. Scanning electron microscope （SEM） observation shows that portlandite always fills up big air bubbles in the paste during precuring in water, and the mercury intrusion porosimetry （MIP） results show that there are less large capillary pores in the paste precured in water for a longer time. It is found that the paste without precuring in water has more carbon dioxide absorption during curing in carbon dioxide atmosphere, and its total pore volume decreases remarkably with an increase in the carbonation time than that precured in water. X-ray diffraction （XRD） and Brunauer-Emmett-Teller （BET） surface area analyses indicate that the carbonate products are vaterite and calcite; CxSHy formed from carbonation has low BET surface area in comparison with that of C-S-H formed from curing in water.

关键词： carbonation carbon dioxide absorption vaterite BET surface area pore size distribution

Structural Health Monitoring by Using Fiber-Optic Distributed Strain Sensors With High Spatial Resolution

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Photonic Sensors 2013年第4期3卷 355-376页

作者： Hideaki murayama Daichi WADA Hirotaka IGAWA School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Japan Aerospace Exploration Agency 6-13-10hsawa Mitaka Tokyo 181-0015 Japan

In this paper, we review our researches on the topics of the structural health monitoring （SHM） with the fiber-optic distributed strain sensor. Highly-dense information on strains in a structure can be useful to identify some kind of existing damages or applied loads in implementation of SHM. The fiber-optic distributed sensors developed by the authors have been applied to the damage detection of a single-lap joint and load identification of a beam simply supported. We confirmed that the applicability of the distributed sensor to SHM could be improved as making the spatial resolution higher. In addition, we showed that the simulation technique considering both structural and optical effects seamlessly in strain measurement could be powerful tools to evaluate the performance of a sensing system and design it for SHM. Finally, the technique for simultaneous distributed strain and temperature measurement using the PANDA-fiber Bragg grating （FBG） is shown in this paper, because problems caused by the cross-sensitivity toward strain and temperature would be always inevitable in strain measurement for SHM.

关键词： Structural health monitoring fiber-optic distributed sensor strain monitoring damage detection load identification

WORK/LIFE COMMUNITY BY TELEWORK—POSSIBILITIES AND ISSUES IN THE CASE OF LOMA LINDA

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Journal of Green Building 2008年第2期3卷 128-139页

作者： yoko Kawai Penguin Environmental Design L.L.C.in HamdenConnecticut

This paper suggests telework, and work/life community created by it, as potential design tools for the sustainability oflocal communities, and investigates their possibility and issues through a case study of Loma Linda Connected CommunityProgram (LLCCP).A new work/life style enabled by information communication technology (ICT), often called telework, is expandingin the U.S. The environmental impact which this gives on community scale has been neglected. Yet, since teleworkcan give the area economic advancement without huge development, make mixed-use zoning plausible, and grantssense of community, it could bring physical, economic and social sustainability to local ***, as an example of emerging municipal ICT deployment programs, was examined on two levels;i.e. levelof urban policy and of urban design. It was revealed that LLCCP, as an urban policy, has a good potential to createICT-served work/life community, thus to contribute to the smart growth of the city. It does so by promoting new businessesyet small/home ones only, and developing new neighborhoods yet ICT-served work/life communities only. Itslink to regional plans and to the building code which ensures the connectivity in entire city elevate its *** paper also pointed out that city’s urban design strategies are not yet supporting LLCCP toward its goal. Itlacks coordination with teleworkers’ life style, and with spatial system for the entire city. A current design proposaloverlooks teleworkers’ driving habits and their specifi c needs to the types of retails/business-services, for example. Theresult implies that the use of telework in creating sustainable community may have started to be recognized on urbanpolicy level, but that urban/architectural design for it is still behind to be developed.

关键词： sustainability telework information communication technology urban policy urban design