A5101771256- CCD and CMOS Imaging Sensors
- Thin-Film Transistor Technologies
- Advanced Memory and Neural Computing
- Meteorological Phenomena and Simulations
- 3D IC and TSV technologies
- Climate variability and models
- Infrared Target Detection Methodologies
- Silicon Nanostructures and Photoluminescence
- Semiconductor materials and devices
- Diamond and Carbon-based Materials Research
- Precipitation Measurement and Analysis
- Retinal Diseases and Treatments
- Analytical Chemistry and Sensors
- Image Processing Techniques and Applications
- Transition Metal Oxide Nanomaterials
- Particle physics theoretical and experimental studies
- Synthesis and properties of polymers
- Quantum Chromodynamics and Particle Interactions
- Metal and Thin Film Mechanics
- Advanced MEMS and NEMS Technologies
- Advanced Optical Sensing Technologies
- Advanced Semiconductor Detectors and Materials
- Glaucoma and retinal disorders
- Nuclear reactor physics and engineering
- Tropical and Extratropical Cyclones Research
Kyoto University
2003-2024
World Meteorological Organization
2024
Shitennoji University
2024
Chiba University
2021-2022
Tokai University
2009-2022
Kyushu University
1992-2022
Japan Meteorological Agency
2004-2021
Tohoku University
2016-2020
University of Science and Technology of China
2020
The University of Tokyo
2017-2020
The effects of sp2-bonded carbon impurities on the electrochemical properties boron-doped diamond were investigated in moderately ([B] < 1020 cm−3) and heavily > 1021 boron doping levels. Significant influences impurities, which show glassy carbon-like after anodic oxidation, observed diamond. This indicated that significant enhanced adsorption possibly caused by surface relaxation strains induced heavy impurities. On other hand, their durability was still similar to electrodes rather than...
Abstract The emergence of exascale computing and artificial intelligence offer tremendous potential to significantly advance Earth system prediction capabilities. However, enormous challenges must be overcome adapt models systems use these new technologies effectively. A 2022 WMO report on recommends “ urgency in dedicating efforts attention disruptions associated with evolving that will increasingly difficult overcome, threatening continued advancements weather climate capabilities .”...
The Meteorological Research Institute of the Japan Agency has developed a cloud-resolving nonhydrostatic 4-dimensional variational assimilation system (NHM-4DVAR), based on Nonhydrostatic Model (JMA-NHM), in order to investigate mechanism heavy rainfall events induced by mesoscale convective systems (MCSs). A horizontal resolution NHM-4DVAR is set 2 km resolve MCSs, and length window 1-hour. control variables are wind, vertical pressure, potential temperature, surface pressure pseudo...
Abstract The regional model‐based Mesoscale Ensemble Prediction System (MEPS) has been operational since June 2019 at the Japan Meteorological Agency (JMA). primary objective of newly MEPS is to provide uncertainty information for JMA's model, Model (MSM), which provides support disaster prevention and aviation safety. This article describes in detail discusses issues be addressed future. For effective evaluation uncertainties MSM, forecast model configured same way as that except initial...
The regional data assimilation system at the Japan Meteorological Agency employs a variational on basis of non-hydrostatic model ASUCA (named ASUCA-Var). This paper reviews configurations and current status ASUCA-Var. To consider consistency analysis prognostic variables, control variables ASUCA-Var include soil basic atmospheric variables. background-errors based are calculated every three hours for land sea grid points to better reflect representative error covariance structure, taking...
We have developed a quarter video graphics array (QVGA) digital pixel image sensor by using the 3-D integration technology. The pulse-frequency modulation (PFM) analog-to-digital converter (ADC) operates as pixel, which overcomes signal saturation due to full well capacity of photodiode (PD). also newly designed PFM-ADC for pixels with pinned PD and floating diffusion comply CMOS process used attain high sensitivity low noise. PDs, comparators, logic circuits, counters are integrated into...
The preparation of organic–inorganic polymer hybrids consisting carbon–carbon and siloxane chains was investigated by radical polymerization 3-methacryloxypropyltrimethoxysilane (MAS) followed acid-catalyzed hydrolytic polycondensation. condensation poly(3-methacryloxypropyltrimethoxysilane) (S-PMA) various molecular weights Mn =830–12000 prepared polyaddition provided transparent flexible free-standing hybrid gel films. mechanical properties these films were highly dependent on the chain...
A 640×480 pixel field emitter array (FEA) image sensor with a high-gain avalanche rushing amorphous photoconductor (HARP) target was fabricated and tested as step toward the development of ultrahigh-sensitivity compact sensors for high-definition television cameras. For this sensor, an active-matrix Spindt-type FEA integrated scanning circuits magnetic electron focusing system were designed, 15-μm-thick-HARP used. The experimental results revealed that prototype had enough resolution its...
This study reports pixel-parallel three-layer stacked complementary metal–oxide–semiconductor image sensors developed for the first time. The hybrid bonding of silicon-on-insulator (SOI) wafers with Au electrodes embedded in SiO2 surfaces enabled face-to-back as well face-to-face bonding, facilitating multilayer stacking, and signal processing. A three-layered pixel, comprising a photodiode (PD), pulse generation circuit, counters, served analog-to-digital converters (ADCs), reducing its...
We have developed a highly sensitive, compact image sensor that comprises field emitter array (FEA) and high-gain avalanche-rushing amorphous photoconductor target, with the ultimate aim of developing an ultrahighly compact, high-definition television camera. Double-gated FEs advantage having electron beam focusing system; however, intensities reproduced by were nonuniform due to low current. Furthermore, simulated current disagreed measured The characteristics two types double-gated,...
The authors have developed a highly sensitive, compact image sensor comprising field emitter array (FEA) and high-gain avalanche rushing amorphous photoconductor (HARP) target with the ultimate aim of developing an ultrahigh sensitivity, compact, high-definition television camera. Double-gated emitters advantage electron beam focusing system; however, intensities reproduced by double-gated, Spindt-type electrode stacked 1.5 μm above gate were nonuniform owing to low current. minimum required...
Abstract The recent improvements of complementary metal–oxide–semiconductor (CMOS) image sensors are playing an essential role in emerging high-definition video cameras, which provide viewers with a stronger sensation reality. However, the devices suffer from decreasing sensitivity due to shrinkage pixels. We herein address this problem by introducing hybrid structure comprising crystalline-selenium (c-Se)-based photoconversion layers and 8 K resolution (7472 × 4320 pixels) CMOS field-effect...
From the perspective of stable operation power transmission system, system operators (TSO) needs to procure reserve adjustment at stage previous day based on solar forecast information from global horizontal irradiance (GHI). Because is determined major outliers in past forecasts, reducing maximum error addition improving average accuracy extremely important grid operation. In past, researchers have proposed various methods combining numerical weather prediction (NWP) and machine learning...
Abstract— A prototype ballistic electron surface‐emitting display (BSD) was fabricated on a TFT or PDP glass substrate by using low‐temperature process. 84 × 63‐pixel, 7.6‐in.‐diagonal full‐color BSD shows excellent performance, comparable to the previously reported 2.6‐in. model. This result demonstrates strong possibility of large‐panel BSDs.
Wafer-scale hermetic sealing in air and vacuum was achieved by using Au–Au surface activated bonding (SAB) sputtered ultrathin Au films (thickness: 15 nm). Because such with small grains have smooth surfaces (root mean square roughness: around 0.3 nm), pressureless at room temperature is feasible. For sealing, the leakage rate an He leak test less than lower limit of tester (<1.6 × 10−10 Pa m3 s−1). thin glass caps 50 μm) over vacuum-sealed cavities exhibited deflection after due to pressure...
A novel active-matrix driving circuit, consisting of a level-shifter in each pixel and low-voltage (5 V) vertical horizontal scanning circuits, was simulated fabricated as part an effort to develop flat image sensor Spindt-type field emitter array (FEA) high-gain avalanche rushing amorphous photoconductor target for ultrahigh-sensitivity compact high-definition television (HDTV) cameras. Although the circuit developed our previous work could not drive FEA quickly enough meet HDTV standard,...
Abstract Nanocomposite materials based on polyamide‐imide have not been able to prevent nano‐particles from aggregating, and therefore the development of this material has extremely difficult. However, we prevented aggregation by developing low‐hygroscopicity solvent copolyamide‐imide, commercialized a new partial discharge‐resistant enameled wire with nanocomposite insulating in 2010. The lifetime newly developed is 1000 or more times that ordinary organic‐enameled wire. also excellent...