A5103164261- Synthetic Aperture Radar (SAR) Applications and Techniques
- Advanced SAR Imaging Techniques
- Concrete Properties and Behavior
- Innovative concrete reinforcement materials
- Soil Moisture and Remote Sensing
- Concrete and Cement Materials Research
- Structural Behavior of Reinforced Concrete
- Advanced Antenna and Metasurface Technologies
- Geophysical Methods and Applications
- Millimeter-Wave Propagation and Modeling
- Electromagnetic Scattering and Analysis
- Structural Load-Bearing Analysis
- Remote Sensing and Land Use
- Microwave Engineering and Waveguides
- Fire effects on concrete materials
- Radio Wave Propagation Studies
- Electromagnetic Simulation and Numerical Methods
- Microwave Imaging and Scattering Analysis
- Ocean Waves and Remote Sensing
- Recycled Aggregate Concrete Performance
- Electromagnetic Compatibility and Measurements
- Power Line Communications and Noise
- Antenna Design and Analysis
- Flood Risk Assessment and Management
- Metal Forming Simulation Techniques
Niigata University
2015-2025
Keio University
2025
Nihon University
1998-2024
Okayama University
2021-2024
JFE Holdings (Japan)
2021
Hiroshima University
2009-2019
Kyoto University
2019
The University of Tokyo
2017-2019
ETH Zurich
2019
Mitsubishi Electric (Japan)
2019
This paper presents an improvement to a decomposition scheme for the accurate classification of polarimetric synthetic aperture radar (POLSAR) images. Using rotation coherency matrix minimize cross-polarized component, four-component scattering power is applied fully SAR It known that oriented urban area and vegetation signatures are decomposed into same volume mechanism in previous decompositions it difficult distinguish from oblique areas with respect direction illumination within...
This paper contains a detailed description on the crack controlling method for Continuously Reinforced Concrete Pavement (CRCP). A longitudinal originated from transverse cracks is considered as failure criteria in CRCP. As possibility of this cracking depends load transfer efficiency at crack, control, namely both width and spacing, thought key stone designing study consists following steps. Firstly new formulas calculating stress reinforcement have been derived. By using those, spacing can...
In order to evaluate whether concrete with recycled aggregate can be applied for structures, flexural loading tests of reinforced members were carried out. The coarse and the fine produced mainly from various a building structure as well 300 mm cubic specimens. properties aggregates, such strength, Young's modulus, shrinkage, creep shrinkage-induced stress depending on combination natural curing condition, water binder ratio, discussed based comparison virgin aggregates. Furthermore,...
It is important to monitor environmental changes of the Earth's cover by remotely sensed data. This paper analyzes seasonal a wetland modified polarimetric four-component scattering power decomposition method. The data sets analyzed here are L- and X-band fully synthetic aperture radar (POLSAR) data, which have been acquired NICT/JAXA airborne interferometric system in 2004. Since there existed deficiency currently adopted schemes that negative powers appear few pixels image analysis, we...
Graphene and graphene oxide (GO) are promising two-dimensional nanomaterials. An ultimate goal is to achieve large-scale bottom-up syntheses of perfect GO. However, controlled graphitic structures still remain challenges in chemistry materials science. Moreover, amorphous types have not received much attention. The present work shows syntheses, structures, applications GO analogues alternative the ideal ones. simultaneous multiple reactions two conjugated monomers provide polymer networks...
In this presentation, a new decomposition scheme of first using rotation the coherency matrix followed by four-component is presented. It shown airborne Pi-SAR data sets that oriented urban areas are clearly distinguished from volume scattering as double bounce objects matrix.
The effect of early age shrinkage on the diagonal cracking strength reinforced high-strength concrete beams is investigated, using thirty two with a distance from compressive fiber to centroid reinforcing bars (effective depth) 250 mm, 500 mm and 1000 made conventional high-shrinkage low-shrinkage concretes water-to-binder ratio 0.23. loading test results show that shear at 5% 18% lower depending effective depth compared beams, dependence apparently different between both. ultimate former...
Expansive additive is well known to be effective in compensating early-age shrinkage and the resultant induced stress reinforced high-strength concrete (HSC) members. On other hand, there have been few studies on numerical analysis methods for evaluating such stress, which are vital verify risk of cracking. The present study formulates a 3-dimensional finite element method as practical calculation based beam theory, both consider principle superposition linear stress-strain relationship...
Abstract Steelmaking slag is one of the most massive industrial by-products generated during steelmaking processes. This paper presents current production status and its potential to use as mineral aggregates in base/sub-base layer road pavement. The mechanical properties were confirmed by test method specified Vietnam specification. volume stability was conducted based on JIS A 5015-2018 (Japanese Industrial Standard: Iron steel for construction). From results, it that can satisfy all...
The present study aims to investigate the effects of porous ceramic waste aggregate (PCA) coarse as an internal curing material on compressive strength, porosity, and shrinkage portland blast furnace cement type B concretes (BB) with a water-to-cement ratio (W/C) 0.55, in which replacement ratios conventional by PCA were 10 20% volume specimens exposed drying at ages 3 7 days cured under sealed condition. results showed that using replace was effective improving strength BB compared ordinary...
Purpose The behavior of high-performance concrete (HPC) at high temperatures is very complex and also affects the global heated HPC-based structures. Researchers have reported how various types fibers affected mechanical properties cement-based materials temperatures. This study aims to discuss effects on compressive strength elastic modulus HPC with polypropylene (PP) jute fiber. Design/methodology/approach Adding synthetic fiber (especially PP type) a widely used effective method...
This paper aims to show the importance of autogenous shrinkage for serviceability performance reinforced high-strength concrete (HSC) flexural beams, and also effectiveness low-shrinkage HSCs (LS-HSC) made by using expansive additive and/or shrinkage-reducing chemical agent Belite-rich low-heat Portland cement improving beam. From design equation point view, this proposes a new concept evaluating crack width deformation RC beams taking into consideration early age before loading. The...
Diffraction field by a wide and thick slit on conducting screen has been analyzed. High frequency ray-mode coupling analysis utilized, the total diffracted or radiated in each region is considered as summation of successive modal radiation contribution due to original excitation incident plane wave. Our derived results are compared with those obtained other solutions, good agreement observed, validity our formulation confirmed.
A high-frequency asymptotic method has been applied to formulate E-polarized plane wave diffraction by a thick slit. The slit structure is regarded as an open-ended parallel waveguide cavity, and the excitation of modes their reradiation are derived from ray-mode conversion technique. Comparison with another reveals validity effectiveness our formulation.
高強度コンクリートを用いたRCはりの斜めひび割れ発生時の公称せん断応力度 (以下, せん断強度) と寸法効果を明らかにするため, 圧縮強度36~100N/mm2, 有効高さ250~1000mm, せん断スパン比2~5としたせん断補強筋のないRCはりのせん断強度を実験的に検討した. その結果, 寸法効果は普通強度コンクリートのそれよりも大きいことを確認した. さらに破壊力学的アプローチに基づき, コンクリート引張強度で正規化したせん断強度は, 特性長さに対する有効高さの比の-1/2乗に比例することを確認した. これらに基づき, 圧縮強度80~125N/mm2の高強度コンクリートに対して, 寸法効果は有効高さの-1/2乗に比例するとした新しいRCはりのせん断強度算定式を提案した.