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Nuclear Science and Techniques 2011年第1期22卷 18-24页

作者： LIU Ruiqin WEI Yuezhou Daisuke Tozawa XU Yuanlai Shigekazu Usuda Hiromichi Yamazaki keizo ishii Yuichi Sano Yoshikazu Koma School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Cyclotron and Radioisotope Center Tohoku UniversityAoba 6-3Aramaki-Aoba-kuSendaiMiyagi980-8578Japan Japan Atomic Energy Agency (JAEA) TokaiIbaraki319-1195Japan

Basic properties of a silica-based octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) extraction resin (CMPO/SiO2-P) was *** behavior for some rare earth elements (RE) which are constituents of high level liquid waste (HLLW) and the long-term stability of the extraction resin in nitric acid solution were *** CMPO extraction resin was significantly stable in 3 mol·L?1 HNO3 solution at ***,the RE(III) were efficiently separated from non-adsorptive fission product (FP) elements such as Sr(II) in a column experiment using a highly nitric acid *** separation behaviors of the elements are considered to result from the difference in their adsorption and elution selectivity based on the complex formation with *** was no strong dependency of RE(III) separation efficiency on feed solution flow *** from the perspectives of the acid-resistant behavior of CMPO extraction resin and the elution kinetics for the metal ions with the extraction resin,the CMPO extraction resin can be used in the modified MAREC process for HLLW partitioning.

关键词：萃取树脂高放废液锕系元素分离性能大孔硅提取基础选择性吸附

Bio-mimetic walking with distributed controlled wave gait

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Science China(Technological Sciences) 2010年第11期53卷 2925-2931页

作者： MIYAHARA keizo College of Systems Engineering Shibaura Institute of Technology

This paper describes a multi-agent mobile system that walks. In particular, the gate of the system can be considered as an expansion of the ordinary wave gate, since the class of system configuration is not restricted in a line shape. The system consists of a number of identical units with distributed controllers. The homogeneous units are mechanically connected to construct a mobile platform. Every unit has its local controller that communicates only with its adjacent units. This basic configuration of supervisor-less structure affirmatively confines the dependence of each unit to a local area, and therefore any unit can be removed from/add into any part of a system regardless of the timing without disturbing the performance of the whole system. This flexibility of configuration significantly contributes to easy maintenance of units, such as battery charging or hot-replacing for faulty units. Utilizing the flexibility as well, the system is capable of adapting to a variety of tasks including transportation application and to target objects having various kinds of shape and/or a wide range of mass. A proposed example unit contains a Gough-Stewart Platform, a symmetrical type of parallel link manipulator, as its leg. The whole mobile system is aimed at transportation platform, with high system flexibility, i.e., the system is able to adapt to wide range of target objects. The "digital actuation (D-actuation)" concept is applied to the local unit controller. D-actuation is a concept to drive a mechatronic system with numbers of "digital actuator (D-actuator)" that has only discrete stable states, such as pneumatic cylinders or solenoids. D-actuation yields great benefits: high repeatability, system simplicity, and low cost. Because of the simplicity of the communication data, the control strategy, and the concept of D-actuation, the controlling framework can be implemented as distributed and localized one on every unit. The Schlafli symbol is applied to denote the sys

关键词： wave gait dstributed control multi-agent system digital actuation

Characterizing mouse male germ cell-specific actin capping protein α3 （CPα3）： dynamic patterns of expression in testicular and epididymal sperm

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Asian Journal of Andrology 2008年第5期10卷 711-718页

作者： keizo Tokuhiro Yasushi Miyagawaq Hiromitsu Tanaka TANAKA Project Center for Advanced Science and Innovation Osaka University 3-1 Yamadaoka Osaka 565-0871 Japan Department of Urology Osaka University Graduate School of Medicine Osaka 565-0871 Japan Department of Science for Laboratory Animal Experimentation Research Institute for Microbial Disease Osaka University 3-1 Yamadaoka Suita Osaka 565-0871 Japan Faculty of Pharmaceutical Sciences Nagasaki International University Sasebo Nagasaki 859-3298 Japan

Aim： To characterize mouse capping protein α3 （CPα3） during spermatogenesis and sperm maturation. Methods： We produced rat anti-CPα3 antiserum and examined the expression of CPα3 in various mouse tissues using Western blot analysis and the localization of CPα3 in testicular and epididymal sperm using immunohistochemical analyses. We also examined how the localization of CPα3 and β-actin （ACTB） in sperm changed after the acrosomal reaction by performing immunohistochemical analyses using anti-CPα3 antiserum and anti-actin antibody. Results： Western blot analysis using specific antiserum revealed that CPα3 was expressed specifically in testes. Interestingly, the molecular weight of CPα3 changed during sperm maturation in the epididymis. Furthermore, the subcellular localization of CPα3 in sperm changed dynamically from the flagellum to the post-acrosomal region of the head during epididymal maturation. The distribution of ACTB was in the post-acrosomal region of the head and the flagellum. After inducing the acrosomal reaction, the CPα3 and ACTB localization was virtually identical to the localization before the acrosomal reaction. Conclusion： CPα3 might play an important role in sperm morphogenesis and/or sperm function.

关键词： acrosome male germ cell-specific spermatogenesis testis

Neuromelanin-sensitive magnetic resonance imaging:a promising technique for depicting tissue characteristics containing neuromelanin

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Neural Regeneration Research 2014年第7期9卷 759-760页

作者： Ken Nakamura keizo Sugaya Department of Neurology Tokyo Metropolitan Neurological Hospital

Idiopathic Parkinson＇s disease （IPD） is a progressive, neurodegenerative movement disorder characterized by bradykinesia, muscular rigidity, pos- tural instability and tremor. IPD is usually diagnosed based on clinical findings, but diagnoses are only 75-90% accurate when compared with autopsy results. Improving diagnostic accuracy is critical for the early dif- ferentiation of IPD from other Parkinsonism-related disorders because of differences in their prognoses and treatment. Furthermore, IPD is clinically heterogeneous, with variable prognosis. Although the biological function of neuromelanin has not yet been determined, the selective vulnerability of neuromelanin-containing neurons in patients with IPD suggests a role for this pigment in neurodegeneration. Recently developed ultra-high-field magnetic resonance imaging （MRI） systems produce Tl-weighted neuro- melanin-sensitive images with very high spatial resolution, enabling the de- piction of tissue containing neuromelanin. Here we review recent advances in neuromelanin-sensitive MRI in IPD and related conditions suggesting that neuromelanin may be a potential diagnostic biomarker for IPD.

关键词： IPD Neuromelanin-sensitive magnetic resonance imaging MRI BTP

Preoperative sorting of circulating T lymphocytes in patients with esophageal squamous cell carcinoma: Its prognostic significance

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World Journal of Gastroenterology 2005年第42期11卷 6689-6693页

作者： Tadahiro Nozoe Yoshihiko Maehara keizo Sugimachi Department of Surgery Fukuoka Higashi Medical Center KogaJapan Department of Surgery and Science Graduate School of Medical Sciences Kyushu University Fukuoka Japan Kyushu Central Hospital

AIM: To elucidate the immunologic parameters for the outcome of patients with malignant tumors, especially esophageal squamous cell carcinoma (ESCC) associated with high malignant potential. METHODS: Clinicopathologic features were compared between patients with lower and higher CD4 and CD8 values as well as CD4/CD8 ratio in peripheral blood. RESULTS: The survival rate of patients with higher CD4 value was significantly better than that in patients with lower CD4 value (P = 0.039). The survival rate of patients with higher CD8 value was significantly worse than that of patients with lower CD8 value (P = 0.026). Similarly, the survival rate of patients with higher CD4/ CD8 ratio was significantly better than that of patients with lower CD4/CD8 ratio (P = 0.042). Additionally, multivariate analysis demonstrated that lower CD8 and lower CD4/CD8 ratio were factors independently associated with worse prognosis of patients. CONCLUSION: All the immunologic parameters can predict the outcome of patients with ESCC.

关键词： Lymphocyte sub-population Esophagus Squamous cell carcinoma Prognostic indicator

Energy conversion due to non-ideal electric field in separatrix region of magnetotail reconnection

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Earth and Planetary Physics 2024年第5期8卷 787-796页

作者： YiNan Liu keizo Fujimoto JianQiang Wang XiaoChuan Duan School of Space and Environment Beihang UniversityBeijing 102206China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 102206China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

A recent satellite observation has revealed the presence of energy conversion in the separatrix region(SR)of magnetotail reconnection,driven by perpendicular *** investigated this phenomenon by means of particle-in-cell simulations in two-dimensional(2D)and three-dimensional(3D)*** result indicates that in the 2D simulation,energy conversion in the SR is dominated by parallel components,with the main influencing factor being the parallel electric field,which is not consistent with the ***,a case that is similar to the observation is found in the 3D simulation,suggesting that the observation result may be attributed to the 3D *** findings provide a potential explanation for the satellite observation.

关键词： magnetic reconnection energy conversion PIC simulation separatrix region

Application of FEM Analysis to Braced Excavation

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Tsinghua Science and Technology 2008年第S1期13卷 40-45页

作者：李明飞 Atsushi Nakamura 蔡飞 keizo Ugai FORUM8 Co. Ltd. Department of Civil and Environmental Engineering Gunma University

It is becoming possible to do detailed numerical analyses for the various mechanical behavior of braced excavation by researching and developing the numerical analysis technique such as the finite element method (FEM). However, the mechanical behavior of braced excavation has not been clarified fully both in theory and in experience. Therefore, improving the prediction accuracy during the prior design is very important for making the observational method of braced excavation more effective. In this paper, FEM analyses were performed for a model of braced excavation by using Geotechnical Finite Element Elasto-plastic Analysis Software, GeoFEAS (2D). As the constitutive law of ground, MC-DP model, and Duncan-Chang model were applied. The results were compared and discussed with that of a site measurement, and the effects of the constitutive law of ground on the analyzed result were verified. For the difference between the results, the reason was investigated by the analyses adjusting the elastic modulus of ground, and the appropriate application of the constitutive law was researched.

关键词： numerical analysis retaining wall finite element method (FEM) constitutive law

Optical near-field excitation using liquid crystals on nanostruc- tured photoreactive molecular thin films

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Science China(Physics,Mechanics & Astronomy) 2012年第8期55卷 1351-1355页

作者： OHDAIRA Yasuo SHINBO Kazunari BABA Akira KATO keizo KANEKO Futao Graduate School of Science and Technology Niigata University 2-8050 Ikarashi Nishi-ku Niigata City Niigata 950-2181 Japan Center for Transdisciplinary Research Niigata University 2-8050 Ikarashi Nishi-ku Niigata City Niigata 950-2181 Japan

Optical near-field excitations were investigated on the basis of molecular alignment control of liquid crystals (LCs) on an optically rewritable nanostructure of photoreactive molecular thin films. Twisted nematic (TN) cells of LC molecules were constructed utilizing ITO substrates with 260 nm gratings of an azobenzene molecular thin film, fabricated using standing evanescent waves. The polarization changes of light transmitted through the TN cells, which were due to the alignment changes of LC molecules locally rubbed by the azobenzene nanogratings, were observed. Furthermore, we demonstrated local plasmon excitation of Au nanowires deposited on the azobenzene nanogratings using oblique vacuum evaporation, a phenomenon that produced strong anti-optical absorption spectra. The modulation of the local plasmon resonance in metallic nanowires decorated with LC molecules was confirmed.

关键词： optical near-field azobenzene molecular thin film liquid crystal optical polarization local plasmon excitation

A Simple Lumped Mass Model to Describe Velocity of Granular Flows in a Large Flume

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Journal of Mountain Science 2012年第2期9卷 221-231页

作者： YANG Qingqing CAI Fei UGAI keizo SU Zhiman HUANG Runqiu XU Qiang Department of Civil and Environmental Engineering Gunma University Kiryu 3768515 Japan Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection Chengdu University of Technology Chengdu 610059 China

This paper presents a lumped mass model to describe the run-out and velocity of a series of large flume tests,which was carried out to investigate some propagation mechanisms involved in rapid,dry,dense granular flows and energy transformation when the flows encountered obstacles and reoriented their movement *** between predicted and measured results show that the trend of predicted velocities was basically matched with that of measured *** scrutiny of test videos reveals that subsequent particles with a higher velocity collided with slowed fronts to make them accelerate. However,this simple model cannot reflect collisions between particles because it treated released materials as a rigid ***,the predicted velocity was somewhat lower than the measured velocity in most *** the flow changed its direction due to the variation in slope inclination,the model predicted a decrease in *** predicted decrease in velocity was less than the measured one within a reasonable range of 10% or *** some cases in which a convexity was introduced,the model also predicted the same trend of velocities as measured in the *** velocity increased greatly after the materials took a ballistic trajectory from the vertex of the convexity,and reduced dramatically when they finally made contact with the base of the lower *** difference between prediced and measured decrease in velocity was estimated to be about 5% due to the ***,the simple lumped mass model based on the energy approach could roughly predict the run-out and velocity of granular flows,although it neglected internal deformation,intergranular collision and friction.

关键词： Granular flow Large-scale flume test Mass-front velocity Deposit characteristic

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高阶流形方法及其应用

工程力学 2001年第2期18卷 21-26页

作者：田荣栾茂田杨庆 keizo Ugai 大连理工大学土木工程系及海岸和近海工程国家重点实验室辽宁大连116024 日本群马大学工学部土木工学科

流形方法是一种可进行连续与非连续变形问题分析的灵活而有效的数值计算方法。本文详细地推导了二阶流形方法的具体计算列式，分别开发了一阶流形方法与二阶流形方法的计算程序．通过实例计算表明：提高覆盖函数的阶次可有效地提高流形... 详细信息

流形方法是一种可进行连续与非连续变形问题分析的灵活而有效的数值计算方法。本文详细地推导了二阶流形方法的具体计算列式，分别开发了一阶流形方法与二阶流形方法的计算程序．通过实例计算表明：提高覆盖函数的阶次可有效地提高流形方法的计算精度。

关键词：有限单元法非连续变形分析流形方法有限覆盖高阶流形方法