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Significant Deviations in the Configurations of Homologous Tandem Repeats in Prokaryotic Genomes

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Genomics, Proteomics & Bioinformatics 2009年第4期7卷 163-174页

作者： Shintaro Hirayama satoshi Mizuta Graduate School of Science and Technology Hirosaki University

We explored the possibilities of whole-genome duplication （WGD） in prokaryotic species, where we performed statistical analyses of the configurations of the central angles between homologous tandem repeats （TRs） on the circular chromosomes. At first, we detected TRs on their chromosomes and identified equivalent tandem repeat pairs （ETRPs）; here, an ETRP is defined as a pair of tandem repeats sequentially similar to each other. Then we carried out statistical analyses of the central angle distributions of the detected ETRPs on each circular chromosome by way of comparisons between the detected distributions and those generated by null models. In the analyses, we estimated a P value by a simulation using the Kullback-Leibler divergence as a distance measure between two distributions. As a result, the central angle distributions for 8 out of the 203 prokaryotic species showed statistically significant deviations （P〈0.05）. In particular, we found out the characteristic feature of one round of WGD in Photorhabdus luminescens genome and that of two rounds of WGD in Escherichia coli K12.

关键词： whole-genome duplication statistical analysis tandem repeat Kullback-Leibler divergence prokaryote

Influence of automated driving on driver’s own localization:a driving simulator study

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Journal of Intelligent and Connected Vehicles 2018年第3期1卷 99-106页

作者： Ryuichi Umeno Makoto Itoh satoshi Kitazaki University of Tsukuba IbarakiJapan National Institute of Advanced Industrial Science and Technology Tsukuba CenterTsukuba CentralIbarakiJapan

Purpose–Level 3 automated driving,which has been defined by the Society of Automotive Engineers,may cause driver drowsiness or lack of situation awareness,which can make it difficult for the driver to recognize where he/she ***,the purpose of this study was to conduct an experimental study with a driving simulator to investigate whether automated driving affects the driver’s own localization compared to manual ***/methodology/approach–Seventeen drivers were divided into the automated operation group and manual operation *** in each group were instructed to travel along the expressway and proceed to the specified *** automated operation group was forced to select a course after receiving a Request to Intervene(RtI)from an automated driving ***–A driver who used the automated operation system tended to not take over the driving operation correctly when a lane change is immediately required after the ***/value–This is a fundamental research that examined how the automated driving operation affects the driver's own *** experimental results suggest that it is not enough to simply issue an RtI,and it is necessary to tell the driver what kind of circumstances he/she is in and what they should do next through the *** conclusion can be taken into consideration for engineers who design automatic driving vehicles.

关键词： Automated vehicles Autonomous driving Advanced driver assistant systems Driver behaviors and assistance Human-machine interfaces Request to intervene

Osteoblast compatibility of 3D printed Co-Cr-Mo alloys with different building direction

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Biosurface and Biotribology 2019年第2期5卷 67-70页

作者： satoshi Migita Kosuke Sakashita Suyalatu Graduate School of Science and Engineering Yamagata University4-3-16 JonanYonezawaYamagataJapan NTT Data Engineering Systems Corporation AM Design Lab 2-6-58 SenbahigashiMinooOsakaJapan

Three-dimensional(3D)metal printing is an attractive technique for fabricating biomedical *** microstructures and mechanical properties of the fabricated 3D metal printed products show anisotropy because the grains grow along the z-axis ***,the effects of different printing directions on the cytocompatibility of the products are *** the present study,cobalt-chromium-molybdenum(Co-Cr-Mo)alloy cylinders were fabricated along the z-axis(vertical)and x-axis(horizontal),respectively,and the effect of build direction on the cytocompatibility was *** build direction of 3D printed Co-Cr-Mo alloy changed grain anisotropy;however,there was no statistical difference in grain *** wettability,protein adsorption,cell attachment,and cell proliferation on the disks of vertical and horizontal products were similar to those on cast alloy;they were significantly lower than those of commercially pure titanium and tissue culture *** build direction of 3D printed Co-Cr-Mo alloy does not affect osteoblast compatibility.

关键词： alloy grain alloys

Case study of debris flow disaster scenario caused by torrential rain on Kiyomizu-dera, Kyoto, Japan - using Hyper KANAKO system

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Journal of Mountain Science 2016年第2期13卷 193-202页

作者： Kana NAKATANI satoshi HAYAMI Yoshifumi SATOFUKA Takahisa MIZUYAMA Department of Erosion Control Engineering Kyoto University Kyoto 606-8502 Japan CTI Engineering Co. Ltd. Osaka 541-0045 Japan Department of Civil Engineering Ritsumeikan University Shiga 606-8502 Japan National Graduate Institute for Policy Studies Tokyo106-8677 Japan

This paper presents debris-flow numerical simulations using the Hyper KANAKO system,developed by the *** system uses the debris flow simulator KANAKO 2D equipped with a graphical user interface(GUI);hence,a user can easily produce appropriate landform data for simulations using standard laser profiler data,and visualize the results using a *** KANAKO was applied to the streams around Kiyomizu-dera in Kyoto,***-dera is a famous temple in Japan which is visited by numerous tourists throughout the *** simulated a disaster scenario of debris flow caused by torrential *** set the hydrograph using rainfall intensity data,and set the landform data using information from the Geospatial Information Authority of Japan(GSI) and a digital elevation model(DEM).We evaluated different mesh sizes and also used a digital surface model(DSM) to consider the building *** simulation results showed that with small mesh size,the debris flowmoved through the roads,which seems realistic for a disaster *** buildings were considered,the flow direction changed,and a 1-m flow depth,which was deeper than in other cases,appeared in the flow *** may pose a dangerous situation for evacuations.

关键词：泥石流灾害子系统日本清水暴雨京都图形用户界面地理空间信息

Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity [Invited]

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Photonics Research 2017年第6期5卷 49-55页

作者： YUTA KAWASHIMA SUSUMU SHINOHARA satoshi SUNADA TAKAHISA HARAYAMA Department of Applied Physics School of Advanced Science and Engineering Waseda University Faculty of Mechanical Engineering Institute of Science and Engineering Kanazawa University

We numerically performed wave dynamical simulations based on the Maxwell–Bloch(MB) model for a quadrupole-deformed microcavity laser with spatially selective pumping. We demonstrate the appearance of an asymmetric lasing mode whose spatial pattern violates both the x-and y-axes mirror symmetries of the *** simulations revealed that a lasing mode consisting of a clockwise or counterclockwise rotating-wave component is a stable stationary solution of the MB model. From the results of a passive-cavity mode analysis, we interpret these asymmetric rotating-wave lasing modes by the locking of four nearly degenerate passive-cavity modes. For comparison, we carried out simulations for a uniform pumping case and found a different locking rule for the nearly degenerate modes. Our results demonstrate a nonlinear dynamical mechanism for theformation of a lasing mode that adjusts its pattern to a pumped area.

关键词： Self-adjustment of a nonlinear lasing mode to a pumped area in a two-dimensional microcavity

A Feasibility Study of Power Generation from Sewage Using a Hollowed Pico-Hydraulic Turbine

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Engineering 2016年第4期2卷 510-517页

作者： Tomomi Uchiyama satoshi Honda Tomoko Okayama Tomohiro Degawa Institute of Materials and Systems for Sustainability Nagoya University Nagoya 464-8603 Japan Graduate School oflnformation Science Nagoya University Nagoya 464-8601Japan Faculty of Human Studies Taisho University Tokyo 170-8470 Japan

本文利用微型水轮机技术,着重对污水管道水力发电的可行性进行了研究。首先,对日本丰川河流域排水系统两连接点处的污水流量进行了一年以上的观测,借此分析污水的水力势能;其次,假定微型水轮机被安装在污水管道的连接点位置,通过实验室... 详细信息

本文利用微型水轮机技术,着重对污水管道水力发电的可行性进行了研究。首先,对日本丰川河流域排水系统两连接点处的污水流量进行了一年以上的观测,借此分析污水的水力势能;其次,假定微型水轮机被安装在污水管道的连接点位置,通过实验室试验研究微型水轮机的性能。研究表明:污水管道的连接点处蕴藏有可用于全年发电的水力势能,同时,微型水轮机在该位置可以有效地进行污水水力发电。

关键词：微型水轮机发电污水流量镂空水采水力能源实验室实验连接点

Degradation of Reactive Yellow 86 with photo-Fenton process driven by solar light

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Journal of Environmental Sciences 2010年第9期22卷 1455-1461页

作者： Hideyuki Katsumata Syunya Koike satoshi Kaneco Tohru Suzuki Kiyohisa Ohta Department of Chemistry for Materials Graduate School of EngineeringMie UniversityTsu Environmental Preservation Center Mie UniversityTsu

The decolorization of Reactive Yellow 86 （RY 86）, one of reactive azo dyes, was investigated in the presence of Fenton reagent under solar light irradiation. The decolorization rate was strongly influenced by pH, initial concentrations of H202 and Fe（II）, and so on. An initial concentration of 40 mg/L was decolored more than 90% after 20 min under optimum conditions. The activation energy of the solar photo-Fenton reaction was 1.50 kJ/mol for RY 86 in the temperature range of 10-60℃. In the kinetic study, the rate constant of RY 86 with OH- radicals could be estimated to be 1.7 × 10^10 L/（***）. The decolorization efficiency of RY 86 under solar light irradiation was comparable to the artificial light irradiation. The decrease of TOC as a result of mineralization of RY 86 was observed during photo-Fenton process. The rate of RY 86 mineralization was about 83% under UV irradiation after 24 hr. The formation of chloride, sulfate, nitrate and ammonium ions as end-products was observed during the photocatalytic process. The decomposition of RY 86 gave two kinds of intermediate products. The degradation mechanism of RY 86 was proposed on the base of the identified intermediates.

关键词： reactive azo dye photo-Fenton reaction solar light irradiation decolorization mineralization

Experimental Analysis of Flow Structure in Contra-Rotating Axial Flow Pump Designed with Different Rotational Speed Concept

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Journal of Thermal Science 2013年第4期22卷 345-351页

作者： Linlin Cao satoshi Watanabe Toshiki Imanishi Hiroaki Yoshimura Akinori Furukawa Graduate School of Engineering Kyushu University Department of Mechanical Engineering Kyushu University Oita National College of Technology

As a high specific speed pump, the contra-rotating axial flow pump distinguishes itself in a rear rotor rotating in the opposite direction of the front rotor, which remarkably contributes to the energy conversion, the reduction of the pump size, better hydraulic and cavitation performances. However, with two rotors rotating reversely, the significant interaction between blade rows was observed in our prototype contra-rotating rotors, which highly affected the pump performance compared with the conventional axial flow pumps. Consequently, a new type of rear rotor was designed by the rotational speed optimization methodology with some additional considerations, aiming at better cavitation performance, the reduction of blade rows interaction and the secondary flow suppression. The new rear rotor showed a satisfactory performance at the design flow rate but an unfavorable positive slope of the head-flow rate curve in the partial flow rate range less than 40% of the design flow rate, which should be avoided for the reliability of pump-pipe systems. In the present research, to understand the internal flow field of new rear rotor and its relation to the performances at the partial flow rates, the velocity distributions at the inlets and outlets of the rotors are firstly investigated. Then, the boundary layer flows on rotor surfaces, which clearly reflect the secondary flow inside the rotors, are analyzed through the limiting streamline observations using the multi-color oil-film method. Finally, the unsteady numerical simulations are carried out to understand the complicated internal flow structures in the rotors.

关键词：旋转速度设计流量轴流泵实验分析流动结构转子结构非定常数值模拟汽蚀性能

Fabrication of Co2Fe（Al,Si） and Co2Fe（Al,Si）/MgO on Ge（111） Substrate and Its Magnetic Properties

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Journal of Electronic Science and Technology 2019年第2期17卷 109-115页

作者： Kohei Kataoka Nobuki Tezuka Masashi Matsuura satoshi Sugimoto Graduate School of Engineering Tohoku University

We investigated the interfacial effects on magnetic properties in Co2Fe(Al,Si)/Ge (CFAS/Ge) and CFAS/MgO/Ge systems to demonstrate the effects of the interface structure on magnetic properties. CFAS and CFAS/MgO were deposited on the i-Ge(111) substrate. In-situ reflection high energy electron diffraction (RHEED) patterns showed epitaxially grown CFAS and MgO on Ge(111). According to the X-ray diffraction (XRD)φ-scan of CFAS(220), we determined that the crystallographic orientation relationships were CFAS(111)//Ge(111) and CFAS(111)//MgO(111) Ge(111). The magnetic properties were measured by the vibrating sample magnetometer (VSM) and the saturation magnetization Ms value of CFAS with 2-nm thick MgO reached the value of L21 ordered one. A uniaxial magnetic anisotropy behavior was observed both in CFAS/Ge and CFAS/MgO/Ge structures after annealing. We confirmed the behavior did not only originate from the CFAS/Ge interface but also CFAS/MgO and the ordering structure.

关键词： Co2Fe(Al,Si) full-heusler alloy magnetic anisotropy