A5027973157- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Remote-Sensing Image Classification
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Gamma-ray bursts and supernovae
- Remote Sensing and Land Use
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Remote Sensing and LiDAR Applications
- Landslides and related hazards
- earthquake and tectonic studies
- Solar and Space Plasma Dynamics
- Particle Detector Development and Performance
- Earthquake Detection and Analysis
- 3D Surveying and Cultural Heritage
- Galaxies: Formation, Evolution, Phenomena
- Seismology and Earthquake Studies
- Seismic Performance and Analysis
- Calibration and Measurement Techniques
- Nuclear Physics and Applications
- Statistical and numerical algorithms
- Earthquake and Disaster Impact Studies
- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
Tokyo Institute of Technology
2015-2024
Institute of Science Tokyo
2024
University of Tabriz
2022
ORCID
2021
Universidade Federal de Santa Maria
2019
RIKEN
1996-2018
National Institute of Advanced Industrial Science and Technology
2007-2018
RIKEN Center for Advanced Intelligence Project
2018
Nagoya Institute of Technology
2017
Geological Survey of Japan
2011-2012
Earth observation (EO) technologies, such as optical imaging and synthetic aperture radar (SAR), provide excellent means to continuously monitor ever-growing urban environments. Notably, in the case of large-scale disasters (e.g., tsunamis earthquakes), which a response is highly time-critical, images from both data modalities can complement each other accurately convey full damage condition disaster aftermath. However, due several factors, weather satellite coverage, modality will be first...
We report on the variability of iron K emission line in Seyfert 1 galaxy MCG--6-30-15 during a four-day ASCA observation. The consists narrow core at an energy about 6.4 keV, and broad red wing extending to below 5 which are interpreted as arising from inner parts accretion disk. correlates well with continuum flux whereas weakly anti-correlates. When source is brightest, dominated by core, whilst deep minimum, very weak huge tail appears. However, other times when shows rather rapid...
Synthetic aperture radar (SAR) is remarkable for its capability to record the backscattering coefficient, physical value of earth's surface, regardless weather condition or sun illumination. Therefore, SAR a powerful tool that can be utilized develop universal method comprehend damaged areas in disasters such as earthquakes, forest fires, and floods. We performed feasibility study on characteristics 1995 Hyogoken-Nanbu (Kobe), Japan, earthquake using pre- post-event ERS images, revealing...
In this paper, we propose a method for cloud removal from visible light RGB satellite images by extending the conditional Generative Adversarial Networks (cGANs) to multispectral images. Satellite have been widely utilized various purposes, such as natural environment monitoring (pollution, forest or rivers), transportation improvement and prompt emergency response disasters. However, obscurity caused clouds makes it unstable monitor situation on ground with camera. Images captured longer...
Polygon-based terrain classification data were created globally using 280 m digital elevation models (DEMs) interpolated from the multi-error-removed improved-terrain DEM (MERIT DEM). First, area segmentation was performed with logarithmic value of slope gradient and local convexity calculated DEM. Next, by adding surface texture, k-means clustering polygons grouped into 40 clusters. Then, we tried to reclassify these clusters geomorphologic groups. In this study, attempted reclassification...
A strong earthquake struck the city of Bam in southeast Iran on 26 December 2003. The brought massive destruction to and its surrounding rural areas. QuickBird, a high-resolution satellite, captured clear image 03 January 2004, eight days after event. was also observed by QuickBird 30 September 2003, about three months before In this paper, using pre-event image, location individual buildings registered GIS blocks surrounded major roads were assigned. Then, visual damage interpretation based...
In this paper a new transformation which enables us to detect boundaries of cast shadows in high resolution satellite images is introduced. The based on color invariant indices. Different radiometric restoration techniques such as gamma correction, linear-correlation correction and histogram matching are introduced order restore the brightness detected shadow area
Abstract. On 27 February 2010, a megathrust earthquake of Mw = 8.8 generated destructive tsunami in Chile. It struck not only Chilean coast but propagated all the way to Japan. After event occurred, post-tsunami survey team was assembled, funded by Japan Science and Technology Agency (JST), area severely affected tsunami. The damaged destroyed numerous houses, especially town Dichato. In order estimate structural fragility against hazard this area, curves were developed. Surveyed data...
A methodology for the automated identification of building damage from post-disaster aerial images was developed based on convolutional neural network (CNN) and inventories. The data obtained in 2016 Kumamoto, 1995 Kobe, Japan earthquakes were analyzed. Since roofs many moderately damaged houses are covered with blue tarps immediately after disasters, not only collapsed non-collapsed buildings but also identified by proposed method. CNN architecture this study correctly classifies accuracy...
Burned area (BA) mapping of a forest after fire is required for its management and the determination impacts on ecosystems. Different remote sensing sensors their combinations have been used due to individual limitations accurate BA mapping. This study analyzes contribution different features derived from optical, thermal, Synthetic Aperture Radar (SAR) images extract information Turkish red pine (Pinus brutia Ten.) in Mediterranean ecosystem. In addition reflectance values optical images,...
A strong earthquake occurred beneath the city of Bam, Iran, on 26 December 2003. High-resolution optical satellite images, such as Ikonos and QuickBird, obtained after indicate that severely damaged areas were widely distributed in city. European radar satellite, Envisat, also captured hard-hit 07 January 2004. This paper introduces an automated damage detection technique was developed based data set 1995 Kobe, Japan, applied to Envisat/ASAR images Bam. detailed investigation characteristics...
This paper highlights the recent applications of remote sensing technologies in post-disaster damage assessment, especially 2004 Indian Ocean tsunami and 2006 Central Java earthquake. After tsunami, satellite images which captured affected areas before after event were fully employed field investigations mapping. Since are vast, moderate resolution quite effective change detection due to tsunami. Using high-resolution optical acquired earthquake, building extracted based on pixel-based...
We report the first pointed X-ray observation, made by ASCA, of nearby Seyfert 2 galaxy in Circinus. The spectrum consists a very prominent (EW∼2 keV) fluorescent 6.4-keV iron line, flat continuum (photon spectral index less than 1) and other lines, including one at ∼7 keV that is probably due, least part, to K β emission. consistent with Compton scattering emission from cold matter illuminated an obscured active nucleus.
Abstract Effects of various substituents including chromophores on the second harmonic generation (SHG) Cyanovinylheteroaromatics were examined. The molecular polarizability was calculated by PPP MO method to correlate SHG responsiveness with chemical structures. 3-[(2-cyano-2-ethoxycarbonyl)ethenyl]indole 8b exhibited good efficiency (PE = 25 U). X-ray analysis showed that crystals belong novel and most favorable P1 space group.
The authors have prepared Ba–ferrite film disks and evaluated their magnetic read/write characteristics. c-axis-oriented thin films were formed epitaxially on ZnO by means of a targets-facing-type sputtering system. direction easy magnetization in the with perpendicular crystalline anisotropy is almost to plane. Thus, remanence more than 60 times as large in-plane one. simple films, however, coercive force, Hc⊥ above 2 kOe which too write conventional head. substitution In3+ makes values...
Ba-ferrite films have been prepared by means of Targets-Facing type sputtering method which is very useful to prepare magnetic at high rate without any bombardment energy particles such as γ-electrons and negative ions emitted from the targets favorable obtain stoichiometric good quality. C-axis orientation depends strongly on substrate temperature crystal structure substrate. well oriented BaM are deposited amorphous materials a-SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Damage to individual buildings in an urban area of Port-au-Prince, Haiti, from the 2010 Haiti earthquake was assessed by means high-resolution synthetic aperture radar (SAR) intensity images and ancillary building footprints. A comparison pre- post-event a damage inventory showed that backscattering between more significantly changed collapsed than less damaged buildings. The linear discriminant function, based on difference correlation coefficient developed detect result almost 75% were...
Local geological and ground conditions play important roles in characterizing estimating hazards seismic hazard assessment. The authors recently constructed the Japan Engineering Geomorphologic Classification Map (JEGM), which is a systematically standardized GIS-based ground-condition map containing attributes of geomorphologic classification grid cells 7.5 arc-seconds latitude × 11.25 longitude for nationwide. This paper introduces concept developing 7.5-arc-second JEGM, presents sample...
In this paper, we propose a method for the translation from Synthetic Aperture Radar (SAR) to optical images using conditional Generative Adversarial Networks (cGANs). Satellite have been widely utilized various purposes, such as natural environment monitoring (pollution, forest or rivers), transportation improvement and prompt emergency response disasters. However, obscurity caused by clouds leads unstable of ground situation while camera. Images captured longer wavelength are introduced...
Remote sensing data can be utilized to help developing countries monitor the use of land. However, problem constant cloud coverage prevents us from taking full advantage satellite optical images. Therefore, we instead opt synthetic-aperture radar (SAR), which capture images Earth’s surface regardless weather conditions. In this study, SAR identify newly built constructions. Most studies on change detection tend detect all changes that have a similar temporal characteristic occurring two...
This study is a new assessment of damaged roads after the Kumamoto earthquake in southern Japan (2016) using remotely sensed synthetic aperture radar (SAR) data, field data and deep learning. Three SAR images from descending orbits Sentinel-1 VV (vertical-vertical) polarizations are considered for radiometric calibration, geocoding interferometric analyses. Field terms IRI (international roughness index) were gathered over more than 530 km smartphone accelerometer BumpRecorder application....