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Inter- and intraobserver agreement in computed tomography enterography in inflammatory bowel disease

World Journal of Gastroenterology 2016年第45期22卷 10002-10008页

作者： Natally Horvat Camila Carlos Tavares Adriana Ribas Andrade Julia Campos Sim?es Cabral Hilton Muniz Le?o Filho Angela Hissae Motoyama Caiado serli kiyomi nakao ueda André Zonetti de Arruda Leite Aytan Miranda Sipahi Manoel de Souza Rocha Radiology Department Hospital das Clínicas da Faculdade de Medicina da Universidade de S?o Paulo Gastroenterology Department Lim 07 Hospital da Clínicas da Faculdade de Medicina da Universidade de S?o Paulo

AIM To evaluate intra- and interobserver agreement in imaging features in inflammatory bowel disease and comparison with fecal calprotectin(FC) *** Our institutional computed tomography enterography(CTE) database was retrospectively queried to identify patients who underwent CTE from January 2014 to June 2015. Patient inclusion criteria were confirmed inflammatory bowel disease(IBD) and FC collected 1 pattern, or normal); and signs of active disease(present or absent). In 42 of 44 patients evaluated, routine CTE reports were made by one of the readers who reevaluated the CTEs ≥ 6 mo later, to determine the intraobserver agreement. FC was considered a sign of disease activity when it was higher than 250 μg/*** Forty-four patients with IBD(38 with Crohn's disease and 6 with ulcerative colitis) were included. There was a moderate interobserver agreement regarding localization of IBD(k = 0.540), type of disease(k = 0.410) and the presence of active signs in CTE(k = 0.419). There was almost perfect intraobserver agreement regarding localization, type and signs of active disease in IBD. The k values were 0.902, 0.937 and 0.830, respectively. After a consensus between both radiologists regarding inflammatory activity in CTE, we found that 24(85.7%) of 28 patients who were classified with active disease had elevated FC, and six(37.5%) of 16 patients without inflammatory activity in CTE had elevated FC(P = 0.003). The correlation between elevated FC and the presence of active disease in CTE was significant(k = 0.495, P = 0.001).CONCLUSION We found almost perfect intraobserver and moderate interobserve

关键词： Crohn’s disease Ulcerative colitis Computed tomography Fecal calprotectin Inflammatory bowel disease activity

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Improving Ambient Wind Environments of a Cross-flow Wind Turbine near a Structure by using an Inlet Guide Structure and a Flow Deflector

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Journal of Thermal Science 2005年第3期14卷 242-248页

作者： Tadakazu TANINO Shinichiro nakao Genki UEBAYASHI Nagasaki Institute of Applied Science 536 Aba-machi Nagasaki 851-0193 JapanNagasaki Institute of Applied Science 536 Aba-machi Nagasaki 851-0193 JapanChoryo Engineering Co. Ltd. 5- 717-1 Fukahori-machi Nagasaki 851-0392 Japan

A cross-flow wind turbine near a structure was tested for the performance. The results showed that the performance of a cross-flow wind turbine near a structure was up to 30% higher than the one without a structure. In addition, we tried to get higher performance of a cross-flow wind turbine by using an Inlet Guide Structure and a Flow Deflector. An Inlet Guide Structure was placed on the edge of a structure and a Flow Deflector was set near a cross-flow wind turbine and can improve ambient wind environments of the wind turbine, the maximum power coefficients were about 15 to 40% higher and the tip speed ratio range showing the high power coefficient was wide and the positive gradients were steep apparently.

关键词： vertical axis wind turbine separated flow performance wind power

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BO_(2)-F^(+)Centers in the Radiation-damaged YCOB Crystals

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Chinese Physics Letters 2000年第12期17卷 896-898页

作者： RUAN Yong-Feng Hiroshi nakao Takatomo SASAKI Department of Physics Tianjin UniversityTianjin 300072 Department of Electrical Engineering Osaka UniversityOsaka 565-0871Japan

An intense paramagnetic EPR signal generated from x-ray-irradiated,powdered YCOB crystals was observed at the liquid nitrogen temperature for the first *** peaks,located at the positions where the effective g factor equals to 1.992,1.986,1.980,1.974 and 1.965,labeled as A,B,C,D and E respectively,were *** is believed that the peaks A,B,C and D generated from the BO_(2)-F^(+)center which is a single electron trapped in an oxygen vacancy which was originally occupied by an O^(2-)ion bonded to a(BO3)^(3-)anion *** peak E is thought of coming from Y2+ions that are formed by the Y^(3+) ions trapping *** mechanism for the formation of the radiation-induced defects in the YCOB crystals is suggested.

关键词： Crystal occupied trapping

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Effects of Aspect Ratio in a Transonic Shock Tube Airfoil Flow

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Journal of Thermal Science 2012年第5期21卷 435-440页

作者： Masashi KASHITANI Keita MIURA Shinichiro nakao Yutaka YAMAGUCHI Department of Aerospace Engineering National Defense Academy1-10-20 Hashirimizu Yokosuka 239-8686 JAPAN Department of Mechanical Engineering Nagasaki Institute of Applied Science 536 Aba-MachiNagasaki 851-0193 JAPAN

In the present study, the flow visualizations were performed around the NACA 0012 models which differ in aspect ratios. We discussed the effects of the aspect ratio in the test models. Additionally the unsteady, two-dimensional, compressible Euler equations were solved for the NACA 0012 airfoil. Experiments were performed utilizing the conventional gas driven shock tube as the intermittent transonic wind tunnel. The aspect ratios of the models are about 0.86 and 1.5, respectively. The Mach numbers M 2 are about 0.84. The Reynolds numbers of the present experimental conditions were constant that Re based on chord length is about 4.0×10 5 . The results are as follows: in different aspect ratios, the difference of the shock wave location is confirmed though the Mach number and Reynolds number are same. It indicates the different correction Mach number by the effects of the side wall boundary layer though the nominal Mach number measured the same value. Also, on the difference of shock wave location for the effects of the aspect ratio, the tend of CFD shows the qualitative agreement with the result of an experiment.

关键词： Shock tube Aerodynamics Transonic flows Aspect ratio Wind tunnel correction

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nakao mesenteric approach in pancreatoduodenectomy for pancreatic head cancer

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Journal of Pancreatology 2019年第4期2卷 117-122页

作者： nakao Akimasa Department of surgery Nagoya Central HospitalNagoyaJapan Nagoya Central Hospital NagoyaJapan

The ideal surgery for pancreatic head cancer is isolated pancreatoduodenectomy(PD);that is,en bloc resection using a non-touch isolation *** have been developing isolated PD for pancreatic cancer since 1981,when we developed an antithrombogenic bypass catheter for the portal *** this operation,the first and most important step is the use of a mesenteric approach instead of Kocher’s *** mesenteric approach allows dissection from the non-cancer infiltrating side and determination of cancer-free surgical margins and resectability,followed by systemic lymphadenectomy around the superior mesenteric *** approach enables early ligation of the inferior pancreatoduodenal artery and mesopancreas *** mesopancreas is the second portion of the pancreatic head nerve *** PD is the ideal surgery for pancreatic head cancer from both surgical and oncological *** patients with resectable pancreatic head cancer,isolated PD using the mesenteric approach is suspected to have a higher survival rate than conventional PD using Kocher’s *** precise surgical techniques of the mesenteric approach are herein described.

关键词： Catheter-bypass of the portal vein Inferior pancreatoduodenal artery Isolated pancreatectomy Mesenteric approach Mesopancreas excision Pancreatic cancer Pancreatoduodenectomy

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Asymptotics for the Korteweg-de Vries-Burgers Equation

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1441-1456页

作者： nakao HAYASHI Pavel I.NAUMKIN Department of Mathematics Graduate School of ScienceOsaka UniversityOsakaToyonaka560-0043Japan Instituto de Matemáticas UNAM Campus MoreliaAP 61-3(Xangari)Morelia CP 58089MichoacánMexico

We study large time asymptotics of solutions to the Korteweg-de Vries-Burgers equation ut＋uux-uxx＋uxxx=0,x∈R,t〉0. We are interested in the large time asymptotics for the case when the initial data have an arbitrary size. We prove that if the initial data u0 ∈H^s （R）∩L^1 （R）, where s 〉 -1/2, then there exists a unique solution u （t, x） ∈C^∞ （（0,∞）;H^∞ （R）） to the Cauchy problem for the Korteweg-de Vries-Burgers equation, which has asymptotics u（t）=t^-1/2fM（（·）t^-1/2）＋0（t^-1/2） as t →∞, where fM is the self-similar solution for the Burgers equation. Moreover if xu0 （x） ∈ L^1 （R）, then the asymptotics are true u（t）=t^-1/2fM（（·）t^-1/2）＋O（t^-1/2-γ） where γ ∈ （0, 1/2）.

关键词： Korteweg-de Vries-Burgers equation asymptotics for large time large initial data

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Laser-assisted direct roller imprinting of large-area microstructured optical surfaces

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Microsystems & Nanoengineering 2024年第1期10卷 257-266页

作者： Keisuke Nagato Ken Takahashi Yuki Yajima Masayuki nakao Department of Mechanical Engineering Graduate School of EngineeringThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan

In this study,a high-throughput fabrication method called laser-assisted direct roller imprinting(LADRI)was developed to lower the cost of nanoimprinting large-area polymer films and to address problems associated with nanoimprinting,namely,microstructural damage and precision in flatness of entire *** LADRI,the laser directly heats the microstructured surface of the roller mold,which heats and melts the surface of a polymethyl methacrylate(PMMA)film to replicate the microstructures on the mold *** this study,the effects of laser power density,scanning speed,size of the microstructures,and contact pressure on the replication speed were investigated *** replication speed increased as the power and scanning speed ***,because the film required heating until it filled the entire depth of the microstructure,an appropriate replication speed was *** result was supported by simulation of the temperature distribution inside the mold and the PMMA using transient heat conduction *** demonstrate the applications of LADRI,two different optical surfaces were replicated:an antireflection(AR)structure with conical structures sized several hundred nanometers and a lightextraction structure with a microlens array(MLA)comprising 10μm lenses,for display and illumination,*** replication degree of the MLA was governed by the contact *** flow simulation indicated that the heat conduction and flow speeds of the melted PMMA surface were comparable within several tens of *** addition,the reflectivity of the AR structure decreased from 4 to 0.5%,and the light intensity of the light-extraction structure increased by a factor of 1.47.

关键词： microstructure roller conduction

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A Study on High Subsonic Airfoil Flows in Relatively High Reynolds Number by Using OpenFOAM

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Journal of Thermal Science 2014年第2期23卷 133-137页

作者： Shinichiro nakao Masashi KASHITANI Takeshi Miyaguni Yutaka YAMAGUCHI Department of Mechanical Engineering Nagasaki Institute of Applied Science536 Aba-MachiNagasaki851-0193JAPAN Department of Aerospace Engineering National Defense Academy1-10-20 HashirimizuYokosuka239-8686JAPAN

In the present study,numerical calculations of the flow-field around the airfoil model are performed by using the OpenFOAM in high subsonic *** airfoil model is NACA *** maximum thickness is 10 % of the chord *** SonicFOAM and the RhoCentralFOAM are selected as the solver in high subsonic *** grid point is 158,000 and the Mach numbers are 0.277 and 0.569 *** CFD data are compared with the experimental data performed by the cryogenic wind tunnel in the *** results are as *** numerical results of the pressure coefficient distribution on the model surface calculated by the SonicFOAM solver showed good agreement with the experimental data measured by the cryogenic wind *** the data calculated by the SonicFOAM have the capability for the quantitative comparison of the experimental data at low angle of attack.

关键词： OpenFOAM High Subsonic Flows Cryogenic Wind Tunnel Airfoil

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Thermal Properties of Al-50%Si Alloys

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材料热处理学报 2004年第5期25卷 180-182页

作者： Akio Nishimoto Katsuya Akamatsu Kazuyoshi nakao Kazuo Ichii Department of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka JapanDepartment of Materials Science and Engineering Kansai University Osaka Japan

In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50%Si alloy was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying (MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as ***"6 and 10.7xlO"6, respectively. These values were as same as a CTE of AlaOs ceramics.

关键词： Al-Si合金热膨胀系数焙烧浇铸锶增加

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Chemotherapy as a component of multimodal therapy for gastric carcinoma

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World Journal of Gastroenterology 2006年第13期12卷 2000-2005页

作者： Yasuhiro Kodera Michitaka Fujiwara Masahiko Koike Akimasa nakao Department of Surgery Ⅱ Nagoya University Graduate School of Medicine 65Tsurumai-choShowa-kuNagoyaAichi 466-8550Japan

Prognosis of locally advanced gastric cancer remains poor, and several multimodality strategies involving surgery, chemotherapy, and radiation have been tested in clinical trials. Phase Ⅲ trial testing the benefit of postoperative adjuvant chemotherapy over treatment with surgery alone have revealed little impact on survival, with the exception of some small trials in Western nations. A large trial from the United States exploring postoperative chemoradiation was the first major success in this category. Results from Japanese trials suggest that moderate chemotherapy with oral fluoropyrimidines may be effective against less-advanced （T2-stage） cancer, although another confirmative trial is needed to prove this point. Investigators have recently turned to neoadjuvant chemotherapy, and some promising results have been reported from phase Ⅱ trials using active drug combinations. In 2005, a large phase Ⅲ trial testing preand postoperative chemotherapy has proven its survival benefit for resectable gastric cancer. Since the rate of pathologic complete response is considered to affect treatment results of this strategy, neoadjuvant chemoradiation that further increases the incidence of pathologic complete response could be a breakthrough, and phase Ⅲ studies testing this strategy may be warranted in the near future.

关键词： Surgery Radiation Anticancer drug Adjuvant chemotherapy Neoadjuvant chemotherapy

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