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Right colon cancer presenting as hemorrhagic shock

World Journal of Gastrointestinal Pathophysiology 2011年第1期2卷 15-18页

作者： Tomoyuki Iwata Kazuo Konishi Takahisa Yamazaki Katsuya Kitamura Atsushi Katagiri Takashi Muramoto Yutaro Kubota Yuichiro Yano Yoshiya Kobayashi Toshiko Yamochi Nobuyuki Ohike masahiko murakami Takehiko Gokan Nozomi Yoshikawa Michio Imawari Division of Gastroenterology Department of MedicineShowa University School of Medicine Second Department of Pathology Showa University School of Medicine First Department of Pathology Showa University School of Medicine Division of Gastroenterogical Surgery Department of SurgeryShowa University School of Medicine Department of Radiology Showa University School of Medicine Endoscopic Center Showa University HospitalShowa University School of Medicine

A 67-year-old man visited our hospital with a history of continuous hematochezia leading to hemorrhagic *** abdominal computed tomography scan re-vealed a large mass in the ascending colon invading the duodenum and pancreatic head as well as extra-vasation of blood from the gastroduodenal artery(GDA) into the *** revealed an irregular ulcerative lesion and stenosis in the ascending ***,right hemicolectomy combined with pylorus-preser ving pancreaticoduodenectomy was ***,the tumor was classified as a moderately differentiated ***,cancer cells were mainly located in the colon but had also invaded the duode-num and pancreas and involved the ***,the tumor cells were positive for cytokeratin(CK)20 and carcinoembryonic antigen(CEA)but not forCK7 and carbohydrate antigen(CA)*** patient died 23 d after the surgery because he had another episode of arterial bleeding from the anastomosis *** En bloc resection of the tumor with pancreatico duodenectomy and colectomy performed for locally advanced colon cancer can ensure long-term survival,patients undergoing these procedures should be carefully monitored,particularly when the tumor involves the main artery.

关键词： Colon cancer Hemorrhagic shock Adjacent organs invasion En bloc resection Complication

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A weeding-duration model for Abies sachalinensis plantations in Hok-kaido, northern Japan

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Journal of Forestry Research 2013年第1期24卷 131-136页

作者： masahiko Nakagawa Doto Station Forestry Research InstituteHokkaido Research OrganizationShintoku-choHokkaido081-0038Japan

I developed a weeding-duration model for Sakhalin fir （Abies sachalinensis （Fr. Schmidt） Masters） plantations that employs a generalized linear model. The number of years following planting that weeding is necessary is the response variable, and elevation, slope steepness, maximum snow depth, annual precipitation, geology, soil, site index, slope aspect, and vegetation type are explanatory variables. Among the explanatory variables, geology, soil, slope aspect, and vegetation type are categorical data. A Poisson distribution is assumed for the response variable, with a log-link function. Elevation, slope steepness, maximum snow depth, annual precipitation, site index, and vegetation type had a significant effect on weeding duration. Among the eight models with the smallest Akaike information criterion （AIC）, I chose the model with no multicollinearity among the explanatory variables. The weeding-duration model includes site index, maximum snow depth, slope steepness （angle） and vegetation type as explanatory variables; elevation and annual precipitation were not included in the selected model because of multicollinearity with maximum snow depth. This model is useful for cost-benefit analyses of afforestation or reforestation with Abies sachalinensis.

关键词： Abies sachalinensis plantation snow depth site index weeding

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Special variation of infiltration-growth processed bulk YBCO fabricated using new liquid source: Ba_(3)Cu_(5)O_(8) (1:1.3) and YbBa_(2)Cu_(3)O_(y)

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1048-1056页

作者： Sushma Miryala Masato murakami Superconducting Material Laboratory Department of Material Science and EngineeringShibaura Institute of Technology3-7-5 ToyosuKoto-kuTokyo 135-8546Japan School of Engineering and Applied Science Princeton UniversityPrincetonNJ 08544United States

Utilization of novel materials,particularly high-T_(c)(critical temperature)superconductors,is essential to pursue the United Nations’Sustainable Goals,as well as to meet the increasing worldwide demand for clean and carbon-free electric power *** magnets are beneficial in several real-life applications including transportation,energy production,magnetic resonance imaging(MRI),and drug delivery *** achieve high performance,one must develop uniform,large-grain,infiltration-growth(IG)processed bulk YBa_(2)Cu_(3)O_(y)(Y-123)*** this study,we report the magnetic and microstructural properties of a large-grain,top-seeded,IG-processed Y-123 pellet,which is 20 mm in diameter and 6 mm in height;the pellet is produced utilizing liquid Yb-123+Ba_(3)Cu_(5)O_(8) as the liquid *** the samples cut from the top of the bulk exhibit a sharp superconducting transition(approximately 1 K wide)with the onset T_(c) of approximately 90 ***,in the samples cut from the bottom surface,the onset T_(c) values slightly decreased to between 88 and 90 K,although still exhibiting a sharp superconducting *** top and bottom samples exhibited the highest remnant value of J_(c)(critical current density)at 77 K H//c-axis of 50 and 55 kA/cm^(2),*** remnant J_(c) and irreversibility field values significantly fluctuated,being fairly low in some bottom *** electron microscopy identified nanometer size Y-211(Y2BaCuO5)secondary-phase particles dispersed in the Y-123 ***-dispersive spectroscopy clarified that the decreased both T_(c) and J_(c) for the bottom samples were attributed to liquid phase dispersion within the Y-123 phase.

关键词： infiltration growth special variation critical current density scanning electron microscopy

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Spin-up and Spin-Down Times of Rotational Air Flow Depended on Mean Air Velocity and Surface Roughness on Inner Surface in Cylindrical Vortex Chamber

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Journal of Thermal Science 2004年第1期13卷 46-55页

作者： Akira Ogawa Hiroyuki murakami Department of Mechanical Eng.College of Eng. Nihon UniversityT-963.TokusadaTamura-machiKooriyama-CityJapanThe Marine Self Defense Forcethe Defense AgencyJapan

The spin-up time TA in the spin-up process and spin-down time TD in the spin-down process of rotational air flow in the cylindrical vortex chamber with three kinds of the artificial surface roughness were investigated. One of the most different characteristics between the smooth and rough surface conditions was the spin-down time TD. Also the transient response of the tangential velocity on the spin-up process was analyzed numerically and this result was compared with the experimental results. The above stated results are reported here in detail.

关键词： vortex chamber spin-up time spin-down time transient response surface roughness.

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Counter-Rotating Type Pump-Turbine Unit Cooperating with Wind Power Unit

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Journal of Thermal Science 2013年第1期22卷 7-12页

作者： Tengen murakami Toshiaki Kanemoto Faculty of Engineering Kyushu Institute of Technology

This serial research proposes the hybrid power system combined the wind power unit with the counter-rotating type pump-turbine unit,to provide the constant output for the grid system,even at the suddenly fluctuating/turbulent *** this paper,the tandem impellers of the counter-rotating type pumping unit was operated at the turbine mode,and the performances and the flow conditions were investigated numerically and *** 3-D turbulent flows in the runners were simulated at the steady state condition by using the commercial CFD code of ANSYS-CFX ver.12 with the SST turbulence *** providing the pump unit for the turbine mode,the maximum hydraulic efficiency is close to one of the counter-rotating type hydroelectric unit designed exclu-sively for the turbine ***,the runner/impeller of the unit works evidently so as to coincide the angularmomentum change through the front runners/impellers with that through the rear runners/impellers,namely to take the axial flow at not only the inlet but also the outlet without the guide *** results show that this type of unit is effective to work at not only the pumping but also the turbine modes.

关键词： pump-turbine pumping mode turbine mode power supply counter-rotation

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The Cross-ratio Compactification of the Configuration Space of Ordered Points on 

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Acta Mathematica Sinica,English Series 2012年第10期28卷 2129-2138页

作者： Risako FUNAHASHI masahiko TANIGUCHI Department of Mathematics Graduate School of Humanities and SciencesNara Women’s University Department of Mathematics Faculty of Science Nara Women’s University

A natural compactification of the virtual configuration space of N points on the Riemann sphere C is constructed by using cross-ratios. We show that this compactification is homeomorphic to the Bers＇ compactification of the virtual moduli space of a punctured Riemann sphere of type N. In particular, the system of global and explicit coordinates of this standard compactification is given by cross-ratios.

关键词： Cross-ratios configuration space planar domains with nodes

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First-principles simulation and experimental evidence for improvement of transmittance in ZnO films

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Progress in Natural Science:Materials International 2011年第1期21卷 40-45页

作者： Ri-ichi murakami Department of Mechanical Engineering The University of Tokushima2-1 Minamijosanjima-choTokushima 770-8506Japan

ZnO/Ag/Glass films were prepared by a DC magnetron sputtering system,which exhibit both excellent properties of high conductivity and high ***,an enhancement of transmission of ZnO films was observed after brought into contact to a silver layer,but the understanding of experimental findings for the enhancement of transmission was ***,the first-principles simulations of electrical and optical properties were utilized using the density functional theory with local-density approximations or generalized-gradient *** crystal structure of ZnO or Ag was imported from the Material Studio *** periodic supercell has the same atomic ratio with the experimental structure and was optimized using the CASTEP package in Material *** to the calculation results,the enhancement in transmission is attributed to the surface plasmon polariton in the asymmetric structure films.

关键词： first-principles transparent conductive oxide ZnO transmittance surface plasmon polaritons

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Markov decision processes associated with two threshold probability criteria

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控制理论与应用（英文版） 2013年第4期11卷 548-557页

作者： masahiko SAKAGUCHI Yoshio OHTSUBO Department of Mathematics Faculty of ScienceKochi University

This paper deals with Markov decision processes with a target set for nonpositive rewards. Two types of threshold probability criteria are discussed. The first criterion is a probability that a total reward is not greater than a given initial threshold value, and the second is a probability that the total reward is less than it. Our first （resp. second） optimizing problem is to minimize the first （resp. second） threshold probability. These problems suggest that the threshold value is a permissible level of the total reward to reach a goal （the target set）, that is, we would reach this set over the level, if possible. For the both problems, we show that 1） the optimal threshold probability is a unique solution to an optimality equation, 2） there exists an optimal deterministic stationary policy, and 3） a value iteration and a policy space iteration are given. In addition, we prove that the first （resp. second） optimal threshold probability is a monotone increasing and right （resp. left） continuous function of the initial threshold value and propose a method to obtain an optimal policy and the optimal threshold probability in the first problem by using them in the second problem.

关键词： Markov decision process Minimizing risk model Threshold probability Policy space iteration

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Involvement of Siglec-15 in regulating RAP1/RAC signaling in cytoskeletal remodeling in osteoclasts mediated by macrophage colony-stimulating factor

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Bone Research 2024年第3期12卷 571-581页

作者： Hideyuki Kobayashi M.Alaa Terkawi Masahiro Ota Tomoka Hasegawa Tomomaya Yamamoto Tomohiro Shimizu Dai Sato Ryo Fujita Toshifumi murakami Norio Amizuka Norimasa Iwasaki masahiko Takahata Department of Orthopaedic Surgery Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo 060-8638Japan Department of Developmental Biology of Hard Tissue Graduate School of Dental MedicineHokkaido UniversitySapporoJapan Department of Orthopaedic Surgery Dokkyo Medical UniversityMibu Shimotsuga 321-0293Japan

DNAX-associated protein 12 kD size(DAP12)is a dominant immunoreceptor tyrosine-based activation motif(ITAM)-signaling adaptor that activates costimulatory signals essential for *** several DAP12-associated receptors(DARs)have been identified in osteoclasts,including triggering receptor expressed on myeloid cells 2(TREM-2),C-type lectin member 5 A(CLEC5A),and sialic acid-binding Ig-like lectin(Siglec)-15,their precise role in the development of osteoclasts and bone remodeling remain poorly *** this study,mice deficient in Trem-2,Clec5a,Siglec-15 were generated.

关键词： remodeling osteoclast stimulating

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Promoting functional recovery by inhibition of repulsive guidance molecule-a after spinal cord injury

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Neural Regeneration Research 2018年第6期13卷 981-982页

作者： Hiroshi Nakagawa masahiko Takada Sobell Department of Motor Neuroscience and Movement Disorders Institute of Neurology University College London Systems Neuroscience Section Primate Research Institute Kyoto University

Spinal cord injury（SCI）leads to permanent disability with motor and sensory *** mature mammalian central nervous system（CNS）possesses a limited capacity to regenerate/regrow after injury.

关键词： Promoting functional recovery by inhibition of repulsive guidance molecule-a after spinal cord injury SCI

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