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Multi-scale Decomposition of Co-seismic Deformation from High Resolution DEMs:a Case Study of the 2004 Mid-Niigata Earthquake

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 1013-1021页

作者： ZHAO Yu KONAGAI kazuo FUJITA Fujitomo Department of Civil Engineering Zhejiang University Institute of Industrial Science University of Tokyo

Decomposing co-seismic deformation is an immediate need for researchers who are interested in earthquake inversion analysis and geo-hazard mapping. However, conventional InSAR or digital elevation models （DEMs） imagery analyses only provide the displacement in the Line-of-Sight （LOS） direction or elevation changes. The 2004 Mid-Niigata earthquake in Japan provides lessons on how to decompose co-seismic deformation from two sets of DEMs. If three adjacent points undergo a rigid-body-translation movement, their co-seismic deformation can be decomposed by solving simultaneous equations. Although this method has been successfully used to discuss tectonic deformations, the algorithm needed improvement and a more rigorous algorithm, including a new definition of nominal plane, DEMs comparability improvement and matrix condition check is provided. Even with these procedures, the obtained decomposed displacement often showed remarkable scatter prompting the use of the moving average method, which was used to determine both tectonic and localized displacement characteristics. A cut-off window and a pair of band-pass windows were selected according to the regional geology and construction activities to ease the tectonic and localized displacement calculations, respectively. The displacement field of the tectonic scale shows two major clusters of large lateral components, and coincidently major visible landslides were found mostly within them. The localized displacement helps to reveal hidden landslides in the target area. As far as the Kizawa hamlet is concerned, the obtained vectors show down-slope movements, which are consistent with the observed traces of dislocations that were found in the Kizawa tunnel and irrigation wells. The method proposed has great potential to be applied to understanding post-earthquake rehabilitation in other areas.

关键词： Co-seismic deformation digital elevation models decomposition tectonic displacement localized displacement moving average method

Positive Luminescent Sensor for Aerobic Conditions Based on Polyhedral Oligomeric Silsesquioxane Networks

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Chemical Research in Chinese Universities 2021年第1期37卷 162-165页

作者： Kazumasa SUENAGA kazuo TANAKA Yoshiki CHUJO Department of Polymer Chemistry Graduate School of EngineeringKyoto UniversityKatsuraNishikyo-kuKyoto615-8510Japan

There are numerous numbers of hypoxia-selective luminescent probes based on oxygen quenching of *** show a unique design for luminescent probes to detect hyperoxia utilizing hybrid networks consisting of aggregation-induced emission(AIE)-active dyes and disulfide *** the initial state,emission from the AIE-active dyes is inducible by suppressing energy-consumable intramolecular motions in the hybrid matrices,while the decrease in intensity was detected by releasing molecular motions corresponded to bond scission at the disulfide ***,it was shown that this process selectively proceeds in *** a result,positive luminescent signals were obtained in hyperoxia.

关键词： Polyhedral oligomeric silsesquioxane(POSS) Network polymer Hypoxia Luminescent probe

A complete introduction to the SCJ proposal and its commentary on the development of seismically resilient cities

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Earthquake Engineering and Engineering Vibration 2018年第4期17卷 677-691页

作者： Akira Wada Ikuo Towhata kazuo Tamura Qu Zhe Tokyo Institute of Technology Tokyo 152-8550 Japan University of Tokyo Tokyo 153-8914 Japan Faculty of Engineering Chiba Institute of Technology Chiba 275-0016 Japan Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China

In modern society, the population, wealth and social functions are increasingly concentrated in a few large cities. Such concentration brings about efficiency while at the same time it increases the vulnerability of the society. To address this issue, the Science Council of Japan（SCJ） published a proposal entitled ＂Shape Cities and Societies Safer against Severe Earthquakes＂. It makes a variety of suggestions for enhancing the seismic resilience of large cities, including：（1） comprehensive thinking based on the latest scientific knowledge and rich imagination;（2） selection of sites suitable for residence and social activities;（3） introducing the urban seismic coefficient;（4） promoting the enhancement of the seismic performance of buildings and civil structures;（5） easing the concentration of population and functions;（6） building communities that enable shelter and escape;（7） resilient technology of information and communication system and its effective utilization;（8） preparation and implementation of emergency response after earthquakes;（9） development and application of new structural seismic technology;（10） learning from domestic and foreign earthquake disasters and launching of international cooperation and knowledge sharing and（11） taking actions from a multidisciplinary perspective. The proposal is introduced in this paper.

关键词： large earthquake large city urban disaster resilience society earthquake engineering

Acoustic CT system for temperature distribution measurement

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仪器仪表学报 2008年第5期29卷 897-902页

作者： Shinji Ohyama Toyofumi Oga kazuo Oshima Junya Takayama Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan Research and Development Headquarters NTT FACILITIES INC. Minato-ku Tokyo Japan

In this paper, a measurement method for cross-sectional temperature distribution is addressed. A novel method based on an acoustic CT technique is proposed. Specifically, the temperature distributions are estimated using the time of flight data of several ultrasonic propagation paths. The times of the flight data contain both temperature and wind effect, and the method to select only temperature component is introduced. A filtered back projection method is applied to reconstruct the temperature distributions from the time of flight data. An experimental system was designed and fabricated to realize simultaneous temperature and wind velocity distribution measurements. Through this system, the effectiveness of the proposed measurement method is confirmed.

关键词：声波CT技术温度分布测量方法超声波

Japan's Bubble,the USA's Bubble and China's Bubble

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China & World Economy 2011年第1期19卷 47-62页

作者： kazuo Ueda University of Tokyo

This paper compares the three recent episodes of boom and bust cycles m asset prices： Japan in the late 1980s to the 1990s; the USA since the mid-1990s; and China during the past decade. Although we have not yet seen a collapse of Chinese property prices, their increases so far are comparable to those in the other two episodes and a careful comparative study is warranted The present paper first examines the behavior of asset prices, of property prices in particular, in the three cases, and highlights some similarities. The paper emphasizes the role played by extremely easy monetary policy in generating bubble-like asset price behavior in the three cases. The reason for easy monetary policies is investigated. In the US case, the monetary authority was concerned about the risk of deflation in the early to mid- 2000s. The experiences of Japan and China are quite similar in that the monetary authorities of both countries were seriously concerned about the possible deflationary effects of exchange rate appreciation on the economy. The implications of such a finding for the future of Chinese macroeconomic policy are discussed

关键词： bubble inflation monetary policy real and nominal exchange rates

SOME COLLISION PROCESSES IN PLASMAS WITH HIGHER TEMPERATURE AND DENSITY

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原子与分子物理学报 1990年第4期7卷 1561-1564页

作者： kazuo Takayanagi

Some collision processes important in hot and dense plasmas are *** calculation of secondary electron velocity distribution in ionizing collision between an electron and a multiply-charged ion is reported.

关键词：等离子体高温高密度碰撞过程

Examining the properties and therapeutic potential of glial restricted precursors in spinal cord injury

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Neural Regeneration Research 2016年第4期11卷 529-533页

作者： kazuo Hayakawa Christopher Haas Itzhak Fischer Department of Neurobiology and Anatomy Drexel University College of Medicine Department of Orthopaedic Surgery Graduate School of Medical SciencesNagoya City University

In the aftermath of spinal cord injury,glial restricted precursors（GRPs） and immature astrocytes offer the potential to modulate the inflammatory environment of the injured spinal cord and promote host axon *** clinical application of cellular therapy for the repair of spinal cord injury requires strict quality-assured protocols for large-scale production and preservation that necessitates long-term in vitro ***,such processes have the potential to alter the phenotypic and functional properties and thus therapeutic potential of these ***,clinical use of cellular therapies may be limited by the inflammatory microenvironment of the injured spinal cord,altering the phenotypic and functional properties of grafted *** report simulates the process of large-scale GRP production and demonstrates the permissive properties of GRP following long-term in vitro ***,we defined the phenotypic and functional properties of GRP in the presence of inflammatory factors,and call attention to the importance of the microenvironment of grafted cells,underscoring the importance of modulating the environment of the injured spinal cord.

关键词： glial restricted precursor spinal cord injury astrocytes axon regeneration inflammatory factors long-term culture

GAUSSIAN BRACKETS METHODS

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光电子·激光 1989年第2期 74-76页

作者： kazuo TANAKA RD Headquaners CANON Inc.

It is reviewed the use of Gaussian brackets in the analysis on Gaussian beam transformation by an optical system.4 The definition of the Gaussian brackets are given together with generalized Gaussian *** of Gaussian b... 详细信息

关键词： GAUSSIAN BRACKETS METHODS

A unified model with a generalized gauge symmetry and its cosmological implications

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Chinese Physics C 2015年第10期39卷 68-76页

作者： Jong-Ping Hsu kazuo O.Cottrell Department of Physics University of Massachusetts Dartmouth

A unified model is based on a generalized gauge symmetry with groups [Sg3c]color×（SU2×U1）X[U1b×U11]. It implies that all interactions should preserve conservation laws of baryon number, lepton number, and electric charge, etc. The baryonie U1b, leptonie U11 and color SU3o gauge transformations are generalized to involve nonintegrable phase factors. One has gauge invariant fourth-order equations for massless gauge fields, which leads to linear potentials in the [U1b × U11] and color [SUao] sectors. We discuss possible cosmological implications of the new baryonie gauge field. It can produce a very small constant repulsive force between two baryon galaxies （or between two anti-baryon galaxies）, where the baryon force can overcome the gravitational force at very large distances and leads to an accelerated cosmic expansion. Based on conservation laws in the unified model, we discuss a simple rotating dumbbell universe with equal amounts of matter and anti-matter, which may be pictured as two gigantic rotating clusters of galaxies. Within the gigantic baryonie cluster, a galaxy will have an approximately linearly accelerated expansion due to the effective force of constant density of all baryonie matter. The same expansion happens in the gigantic anti-baryonic cluster. Physical implications of the generalized gauge symmetry on charmonium confining potentials due to new SUac field equations, frequency shift of distant supernovae Ia and their experimental tests are discussed.

关键词： unified model nonintegrable phase factors conservation laws cosmology accelerated expansion