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Assessment of Human Skeletal Muscle Contraction and Force by Diffusion Tensor Imaging

Open Journal of Radiology 2015年第4期5卷 189-198页

作者： Junichi Hata Haruyuki Nagata kazuki endo Yuji Komaki Masakazu Sato Tomokazu Numano Kazuo Yagi Department of Physiology School of Medicine Keio University Tokyo Japan Central Institute for Experimental Animals Kawasaki Japan Graduate School of Human Health Science Tokyo Metropolitan University Tokyo Japan

We aimed to investigate the association between mobility and skeletal muscle strength by using magnetic resonance diffusion tensor imaging (DTI). This study included 20 healthy male volunteers (mean age, 21.8 ± 1.1 years). The maximum voluntary strength (MVC) of each participant was measured with the ankle joint in plantar and dorsal flexion using an instrument for measuring muscle strength. Moreover, magnetic resonance imaging (MRI) was performed with the ankle joint at rest, in plantar flexion, and in dorsal flexion. For imaging, a 1.5-T MRI device was used, and a diffusion-weighted stimulated echo-planar imaging pulse sequence. Tensor eigenvalues (λ), fractional anisotropy (FA), and the apparent diffusion coefficient (ADC) were calculated from data obtained by DTI. The resulting MRI data were compared to the data on muscle mobility or strength and statistically analyzed. Regarding changes in DTI indices during muscle movements, anisotropy of the tibialis anterior was significantly increased from rest to plantar flexion (P < 0.01), whereas no significant change was observed in dorsal flexion (n.s.). In contrast, the extent of significant changes in anisotropy of the medial gastrocnemius (mGC) and soleus (SOL) was small at plantar flexion (mGC, P < 0.01;SOL, n.s.), whereas the indices were significantly increased at dorsal flexion (P < 0.01). Regarding the correlation between MVC of each skeletal muscle and the DTI indices, FA and λ3 were significantly correlated in movements involving the muscles, whereas no significant correlation was observed in movements not involving them. Changes in intramuscular water molecules by elongation and contraction of the skeletal muscle fibers could be assumed to affect changes in diffusional anisotropy. When muscles contract, the space between myocytes was reduced and they might become increasingly dense. Moreover, diffusional anisotropy increased with increasing MVC, whereas ADC remained unchanged. DTI was suggested to produce me

关键词： Diffusion Tensor Skeletal Muscle Contraction Muscle Force

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Topological phases and edge modes of an uneven ladder

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Chinese Physics B 2024年第8期33卷 154-168页

作者：商文创韩熠宁 Shimpei endo 高超 Department of Physics Zhejiang Normal UniversityJinhua 321004China Key Laboratory of Optical Information Detection and Display Technology of Zhejiang Zhejiang Normal UniversityJinhua 321004China Department of Engineering Science The University of Electro-CommunicationsTokyo 182-8585Japan

We investigate the topological properties of a two-chain quantum ladder with uneven legs,i.e.,the two chains differ in their periods by a factor of *** an uneven ladder presents rich band structures classified by the closure of either direct or indirect *** also provides opportunities to explore fundamental concepts concerning band topology and edge modes,including the difference of intracellular and intercellular Zak phases,and the role of the inversion symmetry(IS).We calculate the Zak phases of the two kinds and find excellent agreement with the dipole moment and extra charge *** also find that configurations with IS feature a pair of degenerate two-side edge modes emerging as the closure of the direct bandgap,while configurations without IS feature one-side edge modes emerging as not only the closure of both direct and indirect bandgaps but also within the band ***,by projecting to the two sublattices,we find that the effective Bloch Hamiltonian corresponds to that of a generalized Su–Schrieffer–Heeger model or the Rice–Mele model whose hopping amplitudes depend on the *** this way,the topological phases can be efficiently extracted through winding *** propose that uneven ladders can be realized by spin-dependent optical lattices and their rich topological characteristics can be examined by near future experiments.

关键词： ladder model symmetry-protected topological phase topological invariant bulk-boundary correspondence

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Optimal interval for delayed retrieval surgery with reciprocating morcellators after enucleation of giant prostatic hyperplasia in holmium laser enucleation of the prostate

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Asian Journal of Urology 2024年第3期11卷 423-428页

作者： Fumiyasu endo Masaki Shimbo Kenji Komatsu Kazuhiro Ohwaki Kazunori Hattori Department of Urology St.Luke’s International Hospital9-1 Akashi-choChuo-kuTokyoJapan Department of Hygiene and Public Health Teikyo University School of Medicine Graduate School of Medicine2-11-1 KagaItabashi-kuTokyoJapan

Objective:The aim of this research was to evaluate the efficiency of reciprocating morcellation for removing giant benign prostatic hyperplasia during holmium laser enucleation of the prostate,investigate whether performing morcellation as a two-stage procedure improves tissue retrieval efficiency,and seek to determine the optimal interval between the two ***:This study included nine cases of holmium laser enucleation of the prostate with an enucleated prostate weight exceeding 200 g,indicative of substantial prostate *** was performed on Day 0(n=4),Day 4(n=1),Day 6(n=1),and Day 7(n=3).The intervals were compared regarding the morcellation efficiency,beach ball presence,and ***:The mean estimated prostate volume was 383(range 330e528)mL;the median enucleation weight was 252(interquartile range[IQR]222,342)g;and the median enucleation time was 83(IQR 62,100)*** mean morcellation efficiency was 1.44(SD 0.55)g/min on Day 0 and 13.69(SD 2.46)g/min on day *** morcellation efficiency was 4.15 g/min and 10.50 g/min on Day 4 and Day 6,respectively,with significantly higher in the two-stage group compared to one-stage group(11.0 g/min vs.1.5 g/min;p=0.014).Efficiency was strongly correlated with intervals(p<0.001);the incidences of beach balls were 100%(4/4)and 60%(3/5)in the immediate and two-stage surgery groups,***:The efficiency of two-stage morcellation with reciprocating morcellators was highly related to the postoperative interval,with the maximum efficiency reached on Day 7.

关键词： Holmiumlaser enucleationofthe prostate Reciprocating morcellator Giant adenoma Two-stage surgery

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Seismic assessment of two multi-tiered pagodas damaged by the 2015 Nepal earthquake

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Earthquake Engineering and Engineering Vibration 2021年第2期20卷 453-469页

作者： Yohei endo Toshikazu Hanazato Department of Architecture Shinshu University4-17-1 WakasatoNagano 380-8553Japan Department of Architecture Mie University1577 Kurimamachiya-chōTsuMie 514-8507MieJapan

A seismic assessment of two multi-tier pagodas by numerical analysis is presented *** Changu Narayan temple and the Kumbeshwar temple in Nepal are used as the case *** pagodas are built of brick masonry in earthen mortar,with timber columns and *** Changu Narayan temple is a two-tier pagoda,and was seriously damaged during the 2015 Gorkha *** Kumbeshwar temple is a five-tier pagoda,and its top-tier collapsed due to the Gorkha earthquake.A seismic assessment was carried out using finite element(FE)*** FE models were prepared,and dynamic identification tests and penetrometer tests were *** analysis and nonlinear dynamic analysis were performed as part of the seismic *** main shock of the 2015 Gorkha earthquake was considered as the input *** behavior between the two pagodas was compared with the collapse mechanisms and damage patterns observed in the actual *** comparison suggested common structural features of multi-tier *** study is dedicated to providing a better understanding of the seismic behavior of multi-tier pagoda-type structures and provides suggestions for their effective analysis.

关键词： masonry multi-tier pagoda seismic assessment nonlinear dynamic analysis FEM analysis

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基于图像处理技术的轨道车辆底部视觉检测系统

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智慧轨道交通 2024年第2期61卷 98-100页

作者： Akihide Uno Takehito Fujii Hiroyuki Nakajima [日]Masanori endo 林凯(译) 王慧(译) 宋微(译) 吕俊超(译) 不详

利用图像处理技术,本文开发了一种用于机车车辆故障检测的系统。该系统能够自动检测诸如底部设备紧固螺栓松动或设备箱盖手柄转动等故障,如有必要,检验人员可以根据该系统显示的图像对机车车辆进行具体检查。目前系统已经具备了车辆底... 详细信息

利用图像处理技术,本文开发了一种用于机车车辆故障检测的系统。该系统能够自动检测诸如底部设备紧固螺栓松动或设备箱盖手柄转动等故障,如有必要,检验人员可以根据该系统显示的图像对机车车辆进行具体检查。目前系统已经具备了车辆底部设备侧面检测功能,我们正致力于将该系统应用于车辆底部设备中间区域及车顶设备的检测。本文对该系统及其用户界面进行了概述。

关键词：机车车辆底部设备检查图像处理线路摄像头

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Luminescence of Eu ^(3+) in LnAlO_3 (Ln=Gd,Y) under UV and VUV Excitation

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Journal of Rare Earths 2004年第1期22卷 95-99页

作者：王育华 endo Tadshi 李峰 Department of Materials Science Department of Materials Chemistry

Single phases of LnAlO 3:Eu 3+ (Ln=Gd,Y) were obtained by the process of evaporation of their nitric acid solution, and then pyrolysis of their nitrate salts. On monitoring by 613 nm emission, broad bands at around 270 and 170 nm were observed in the excitation spectrum of Gd 0.95Eu 0.05AlO 3. These peaks could be assigned to charge transfer (CT) transitions of Eu 3+-O 2- and Gd 3+-O 2- respectively. All the transitions observed in Gd 0.95Eu 0.05AlO 3 are faithfully reproduced in the Y 0.95Eu 0.05AlO 3, but with an exception of the 8S 7/2→ 6I 11/2 transition of Gd 3+. The 153 nm broad band could be the CT transition of Y 3+-O 2-. Accordingly, the efficiency luminescence of (Gd,Y)BO 3:Eu 3+ was explained as a result of CT transitions of Gd 3+-O 2- and Y 3+-O 2- under 147 nm excitation. Under VUV excitation, Gd 0.95Eu 0.05AlO 3 exhibits a bright red luminescence with CIE chromaticity coordinates of (0.623, 0.335) with a PL intensity of 30 of the commercial phosphor (Gd,Y)BO 3:Eu 3+ (KX-504A). The PL spectrum of Y 0.95Eu 0.05AlO 3 is similar to that of Gd 0.95Eu 0.05AlO 3. Calculation of the color coordinates gives x=0.636, y=0.340 with a PL intensity of 50 of the (Gd,Y)BO 3:Eu 3+ (KX-504A) for Y 0.95Eu 0.05AlO 3, and confirms that it has the appearance of pure spectral red, corresponding approximately to 608 nm. It can be concluded that LnAlO 3:Eu 3+ is a promising red VUV phosphor.

关键词： VUV phosphors rare earth aluminates charge transfer transition rare earths

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A QUANTITATIVE MODEL FOR INTRADAY STOCK PRICE CHANGES BASED ON ORDER FLOWS

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Journal of Systems Science & Complexity 2014年第1期27卷 208-224页

作者： LIMeng HUI Xiaofeng endo Misao KISHIMOTO Kazuo School of Management Harbin Institute of Technology Harbin 150001 China. Socio-economic Research Center Central Research Institute of Electric Power Industry Tokyo 100-8126 Japan. Graduate School of Systems Information Engineering University of Tsukuba Ibaraki-ken 305-8571 Japan.

This paper proposes a double Markov model of the double continuous auction for describing intra-day price changes. The model splits intra-day price changes as the repetition of one tick price moves and assumes order arrivals are independent Poisson random processes. The dynamic process of price formation is described by a birth-death process of the double M/M/1 server queue corresponding to the best bid/ask. The initial depths of the best bid and ask are defined as different constants depending on the last price change. Thus, the price changes in the model follow a first-order Markov process. As the initial depth of the best bid/ask is originally larger than that of the opposite side when the last price is down/up, the model may explain the negative autocorrelations of the price of the best bid/ask. The estimated parameters are based on the real tick-by-tick data of the Nikkei 225 futures listed in Osaka Stock Exchanges. The authors find the model accurately predicts the returns of Osaka Stock Exchange average.

关键词： Intra-day price changes market microstructure order flow queuing theory.

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Effects of silicon addition on optical properties of mould flux with iron oxide and estimation of apparent thermal conductivity of flux

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Journal of Iron and Steel Research International 2019年第4期26卷 365-373页

作者： Rie endo Yo Kan Takashi Watanabe Miyuki Hayashi Masahiro Susa Department of Materials Science and Engineering Tokyo Institute of TechnologyTokyo 152-8552Japan Department of Metallurgy and Ceramics Science Tokyo Institute of TechnologyTokyo 152-8552Japan

Mould flux with high absorptivity had been obtained in the reduction process of mould flux by *** further utilisation of the mould flux with high absorptivity,the effect of silicon addition on the optical property has been *** synthesised mould flux powder with iron oxide was melted with the addition of silicon powder at 1703 K followed by quenching,thus forming a glassy *** 5-30-min reduction,the samples exhibited black opaque ***,the samples that were reduced for 45-60 min had a bluish grey *** iron-based particles dispersed in the samples were micrometre order in *** determine the effect of iron particles on the optical properties of the sample,extinction,scattering and absorption efficiencies were calculated according to Mie *** showed that both scattering on the iron particle and absorption by iron effectively increase the extinction efficiency in the mould ***,the silicon particle in the flux has large scattering *** black opaque colour is contributed by the existence of silicon and iron *** apparent thermal conductivity was calculated for the solid *** also indicated that the entire glassy mould flux would effectively work for mild cooling in a continuous casting process owing to high absorptivity and small thermal conductivity.

关键词： Mould flux Reduction Iron oxide Thermal conductivity Optical property

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Large-Scale Electromagnetic Modeling for Multiple Inhomogeneous Domains

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Communications in Computational Physics 2009年第7期6卷 269-289页

作者： Masashi endo Martin Cuma Michael S.Zhdanov Department of Geology and Geophysics University of Utah135S 1460ERm 719Salt Lake CityUT 84112USA

We develop a new formulation of the integral equation(IE)method for three-dimensional(3D)electromagnetic(EM)field computation in large-scale models with multiple inhomogeneous *** problem arises in many practical applications including modeling the EM fields within the complex geoelectrical structures in geophysical *** geophysical applications,it is difficult to describe an earth structure using the horizontally layered background conductivity model,which is required for the efficient implementation of the conventional IE *** a result,a large domain of interest with anomalous conductivity distribution needs to be discretized,which complicates the *** new method allows us to consider multiple inhomogeneous domains,where the conductivity distribution is different from that of the background,and to use independent discretizations for different *** reduces dramatically the computational resources required for largescale *** addition,using this method,we can analyze the response of each domain separately without an inappropriate use of the superposition principle for the EM field *** method was carefully tested for the modeling the marine controlled-source electromagnetic(MCSEM)fields for complex geoelectric structures with multiple inhomogeneous domains,such as a seafloor with the rough bathymetry,salt domes,and *** have also used this technique to investigate the return induction effects from regional geoelectrical structures,e.g.,seafloor bathymetry and salt domes,which can distort the EM response from the geophysical exploration target.

关键词： Large-scale EM modeling multiple inhomogeneous domains marine CSEM

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Influence of oxygen flow rate and compost addition on reduction of organic matter in aerated waste layer containing mainly incineration residue

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Journal of Environmental Sciences 2013年第1期25卷 53-58页

作者： Hiroshi Asakura Kei Nakagawa Kazuto endo Masato Yamada Yusaku Ono Yoshiro Ono Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521Japan National Institute for Environmental Studies Onogawa 16-2TsukubaIbaraki 305-8506Japan Nippon Institute of Technology 4-1 GakuendaiMiyashiro-machiMinamisaitama-gunSaitama 345-8501Japan Kyoto Institute of Technology MatsugasakiSakyo-kuKyoto 606-8585Japan

Landfilling municipal solid waste incineration （MSWI） residue alkalizes the waste layer, causing a subsequent decrease in microbial activity and a delay in the decomposition of organic matter. In this study, efficiencies of neutralization of the leachate and organic matter decomposition in the waste layer in a column filled with MSWI residue using aeration and compost addition were evaluated. Total organic carbon （TOC） reduction in the waste layer is large at high oxygen flow rate （OFR）. To effectively accelerate TOC reduction in the waste layer to which compost was added, a high OFR exceeding that by natural ventilation was required. At day 65, the pH of the leachate when OFR was above 102 mol-O2/（day.m3） was lower than that when OFR was below 101 mol-Oz/（day.m3）. At the same OFR, the pH of waste sample was lower than that of waste sample with compost. Although leachate neutralization could be affected by compost addition, TOC reduction in the waste layer became rather small. It is possible that humic substances in compost prevent the decomposition of TOC in MSWI residue.

关键词： waste landfill aeration neutralization acceleration of stabilization

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