A5089278093- Powder Metallurgy Techniques and Materials
- Aluminum Alloys Composites Properties
- Metallurgy and Material Forming
- Metallurgy and Material Science
- Coastal and Marine Dynamics
- Metal Alloys Wear and Properties
- Engineering Applied Research
- Photovoltaic System Optimization Techniques
- Aluminum Alloy Microstructure Properties
- Advanced materials and composites
- Advanced Battery Technologies Research
- Tribology and Lubrication Engineering
- Thin-Film Transistor Technologies
- Cardiac Imaging and Diagnostics
- Metal and Thin Film Mechanics
- Organic Light-Emitting Diodes Research
- Intermetallics and Advanced Alloy Properties
- Metallurgical and Alloy Processes
- Diabetes Treatment and Management
- Tribology and Wear Analysis
- Solar Radiation and Photovoltaics
- Earthquake and Tsunami Effects
- Gear and Bearing Dynamics Analysis
- Brake Systems and Friction Analysis
- solar cell performance optimization
Hitachi (Japan)
1996-2024
Tokyo Institute of Technology
2019
Tokyo Rinkai Hospital
2017-2018
Keio University Hospital
2017
Asahikawa Medical College Hospital
2000-2010
IRYO Sosei University
1999-2005
Asahi Kasei (Japan)
2004
Niigata University
2003
Mitsubishi Materials (Japan)
1992-1996
Central Research Institute
1992-1996
We have developed a high-speed programming architecture and an image-sticking cancellation technology that utilize pixel circuit with only four TFTs for LTPS active-matrix organic light-emitting-diode (OLED) displays. High-speed is realized through controlled-amplitude precharging. The gate voltage of the drive TFT in data converges fixed on very low short time by This means image-lag-free picture can be achieved low-power high-resolution display. Image-sticking detecting OLED anode...
To reduce implementation, operation, and maintenance costs of large-scale photovoltaic (PV) power plants, we improved upon our previously developed fault-diagnosis architecture that does not require additional sensors. The key technique in this is that, instead using the irradiation module temperature measured pyranometers thermometers, it uses their theoretical values calculated from PV-module characteristics dc voltage current a PV inverter. Failure degradation under both maximum point...
An ice or ice-silica compound system is attractive for electrical insulation at cryogenic temperatures. A sample of without silica was found to have a breakdown strength 0.3 MV/cm ac voltages, and 0.6 impulse voltages. The an ceicesilica 0.7 There were no visible macroscopic cracks in the sample, but microscopic voids may exist, since partial discharges observed about half value voltage. relationship between voids, voltage-time characteristics this studied.
Secondary prevention in patients with myocardial infarction (MI) is critically important to prevent ischaemic heart failure and reduce social burden. Pioglitazone improves vascular dysfunction prevents coronary atherosclerosis, mainly via anti-inflammatory antiatherogenic effects by enhancing adiponectin production addition antihyperglycemic effects, thus suggesting that pioglitazone attenuates cardiovascular events mild (HbA1c levels < 6·5%) diabetes mellitus (DM). Therefore, we evaluated...
A pixel-driving architecture for high-resolution active-matrix organic light-emitting diodes (AMOLEDs)-which eliminates crosstalk-is proposed. The proposed utilizes the fact that hysteresis characteristic of low-temperature-polysilicon thin-film transistors (TFTs) can be controlled by negative bias. high-amplitude negative-bias precharge in suppress one frame length means a simple pixel circuit composed three TFTs and capacitor. result applying this is AMOLED generates no crosstalk. 3.0-in...
A method for generating threshold voltage (V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sub> ) of thin-film transistors (TFTs) is proposed. This applied to the simplest pixel circuit, namely, one composed two TFTs, a drive TFT and an address TFT, capacitor [i.e., TFTs configuration], active-matrix organic light-emitting diode (AM-OLED) displays. It involves steps. First, source quickly precisely detected under condition that carriers,...
We have developed a diagnostic architecture of lithium-ion batteries that finds the variation State Health (SOH) by actively sensing voltage transient response at rest period after discharge, is where each battery cell returns to an equilibrium state. found this represents SOH cells. Since discharge balance controller not activated, we can also predict inside Battery Storage System (BSS). This was applied 20 kVA BSS. experimentally verified architecture. estimate BSS's considering...
Effects of addition sintering aids on aluminum, Al-Si-Cu-Mg-Fe alloy and aluminum bronze were investigated. The AlF3-KF is effective in case but not alloy. It considered that the surface oxide powder removed by eutectic reaction with for formation high melting MgF2, which product KF Mg, prevents was found to reduce temperature although AlF3 alone an aid.
Fine particles of TiB2 were prepared by metallothermic reduction (MTR) TiO2 with Mg or MgO, where we examined the synthesis conditions to obtain smaller fine particles. As a result, found that theory function-building particle preparation could be applied synthesize nano-atomized TiB2. The temperature MTR process also decreased reducing size TiO2. When ST-01, which is smallest in our study, was used as source titanium and treated at 550°C, obtained.
A fluid-film spindle for 2.5 inch hard disk drive is described that effectively reduces nonrepeatable runout to less than 0.05 /spl mu/m, making it possible increase track density. The used with a newly designed three-lobe bearing of which each lobe asymmetrical. influence stiffness and temperature in prototype using this are discussed comparisons made conventional ball-bearing spindle.
A hyper eutectic Al-24mass%Si alloy powder atomized in Ar was consolidated by spark plasma sintering (SPS) and the effect of microstructure on mechanical properties sintered compact examined. The produced SPS method at a temperature 723 K which is 150 lower than that PM fully densified, had good properties. When Al-24mass% SPS, became morphology proeutectic Si regularly arranged boundary between particles. This result indicates occurrence local melting surface. Consequently, stable oxide...
Rapidly solidified niobium aluminides (Nb3Al) have been studied to understand their ability as structural materials for ultra-high temperature applications. A new gas atomization process combined with plasma-skull-melting without any refractory, refractory metal and ceramic, has developed produce ultra-clean powders. In this process, named Plasma-Melt-Gas-Atomization (PMGA), a pouring nozzle molten stream is made of water-cooled copper bottom hole. powders Nb3Al successfully obtained. Mean...
P/M forging of some rapidly solidified aluminum alloy powders was investigated in order to develop an inexpensive production process high strength parts with complex shapes. The results this study are summarized as follows:1. investigation several for Al-18%Si showed that mechanical properties produced by the rigid die hot coining, followed good those extrusion.2. Forging Al-25%Si-3%Cu-1%Mg-1%Fe and Al-10%Fe-1.5%Mo-1%V wear resistance heat parts, respectively were investigated, extrusion. In...
We developed deterioration-detection and failure-detection algorithms for a storage battery succeeded in declaring the timing of future failure by using hysteresis characteristics voltage change only few seconds. The greatest advantage these is caused physical phenomenon battery, i.e., resistance due to deterioration difference thermal reaction energy during discharging. evaluated batteries linking with after charging By capturing or ratio discharging, we could determine health potential...
In this study, the model in which Young’s modules(E) depends on only porosity (P) was investigated by experimental results of sintered iron, and new equation modulus against derived. The confirmed applying to relationship between obtained acoustic pulse method resonance frequency method. derived is E(P)=E0(1−kE·P)·(1−P), where kE E0 are a positive constant E at P=0, respectively. This shows that term 1−P represents effect 1−kE·P pore morphology effect, such as shape, size interconnection...
The relationships among elastic modulus, sound velocity and porosity (P) were investigated by theoretical model experimental results obtained acoustic pulse method. Young's modulus (shear modulus) decreased with increasing P as (E0-KE⋅P)·(1-P), where KE E0 are constants.The square of was a function P. calculated using the relation corresponded to measured against Furthermore, it clarified that can be velocities at P=0 two constants.In these relations, constants changed critical pore...
Carbon fibers have been subjected to surface treatment by amination in order improve adhesion strength between the and an epoxy resin at carbon fiber reinforced plastic (CFRP). XPS measurements confirmed introduction of amino groups on fuming nitric acid followed reduction with sodium dithionate. The tensile a single was not affected surface. interfacial shear (τ) unmodified, nitrated aminated evaluated embedded test specimens. shown about 30 % as compared unmodified fiber.