A5101580571- Magnetic confinement fusion research
- Chemical Looping and Thermochemical Processes
- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- X-ray Diffraction in Crystallography
- Solar Thermal and Photovoltaic Systems
- advanced mathematical theories
- Superconducting Materials and Applications
- Conducting polymers and applications
- Catalytic Processes in Materials Science
- Crystallization and Solubility Studies
- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
- Solar and Space Plasma Dynamics
- Industrial Gas Emission Control
- Image Retrieval and Classification Techniques
- Mathematical Dynamics and Fractals
- Topological and Geometric Data Analysis
- Catalysts for Methane Reforming
- Microstructure and Mechanical Properties of Steels
- Analytical Chemistry and Chromatography
- Fusion materials and technologies
- Solar-Powered Water Purification Methods
- Organometallic Complex Synthesis and Catalysis
Kyushu University Hospital
2022-2024
Tokyo University of Science
2009-2024
Kanazawa University
2005-2023
Kyushu University
2021
Kyushu Dental University
2021
Toshima Manufacturing (Japan)
2020
Kokushikan University
2019
Kaneka (United States)
2018
University of Miyazaki
2014-2017
Furukawa Electric (United States)
2012-2017
Electrical resistivities of heavily doped polyacetylene and polypyrrole exhibit a wide range temperature variation as function the degree disorder. Thermal activation behavior is found for strongly disordered state, while weak dependence down to mK region weakly state. In intermediate we resistivity represented by logT dependence, in manner similar amorphous metals. As cause possibility scattering via interaction with molecular configurations possessing low-energy internal degrees freedom considered.
The metallic state of the very highly conducting doped polymers, such as polyacetylene, polypyrrole and polyaniline, is shown to have remarkable similarities. Though each these polymers has a different temperature-dependent conductivity, polymer systems similar metal-like Pauli susceptibility density states at Fermi level. Also, displays universal electronic response (dielectric constant conductivity) function frequency from microwave regime (109 Hz) through 'all conduction electron plasma...
The very highly conducting state of polypyrrole is investigated. A Drude metallic response, similar to the behavior usual metals, determined, based on coincidence dc and microwave conductivities, measurement a huge negative dielectric constant, optical determination an unusual plasma frequency in far ir. Only fraction conduction electrons participate behavior. real part function shows second near ir, attributed remaining electrons, confined due lack homogeneous, three-dimensional order.
The rotary-type solar reactor has been developed and fabricated for hydrogen production by a two-step water-splitting process using the reactive ceramics of CeO2 Ni,Mn-ferrite (Ni0.5Mn0.5Fe2O4). It cylindrical rotor dual cells discharging O2 H2O splitting reaction. A detailed specification efficiency were examined process. maximum temperature mounted on was ca. 1623 K irradiation with simulator an infrared imaging lamp. Repetition achieved, successive evolution H2 observed in H2O-splitting...
We successfully introduced end-capping functional groups to poly(2-vinylpyridine)s by initial introduction of the on yttrium catalysts through C-H bond activation heteroaromatics and internal alkynes Y center via alkylyttrium-mediated σ-bond metathesis.
This perspective summarizes direct C-H bond functionalization reactions catalyzed by group 3-5 metal alkyl complexes. Metal-carbon bonds of metals have potentially high reactivity toward both activation through the intrinsic σ-bond metathesis pathway and insertion unsaturated organic molecules. Upon combination these two elemental steps, (hetero)aromatic compounds, methane, alkylamines, terminal alkynes, proceed C(sp)-H, C(sp(2))-H, C(sp(3))-H reactions. Here we review as catalysts for...
The temperature dependence of the electrical conductivity and low-temperature magnetoresistance for iodine-doped highly conducting polyacetylenes are reported. overall behavior is explained in terms phenomenological Sheng model, but selection parameter values not unique, suggesting that model sufficient to characterize samples. changes rather drastically with conductivity, which determined by doping concentration chemical reactions within (CH${)}_{\mathit{x}}$. magnetic-field effect...
Expert drivers' deceleration patterns in last-second braking will be formulated using a perceptual risk index for the approach and proximity of preceding vehicle as examples comfortable patterns. It shown that pattern can uniformly generate smooth profile many conditions. In addition, brake initiation timing expert drivers successfully modified index. Finally, an automatic system collision avoidance proposed based on brake-initiation model pattern. Twenty five experience is installed...
We successfully prepared and characterized a wide variety of group 3 metal complexes containing dianionic or monoanionic glyoxal-based N,N′-bis(2,6-diisopropylphenyl)-1,4-diaza-1,3-butadiene (DAD) ligand using salt metathesis reaction trichlorides with the dipotassium DAD direct reduction 1:1 mixture powders halides. The coordinated to in σ2-enediamide manner for dimeric yttrium, ytterbium, europium complexes, whereas σ2,π-enediamide coordination was observed lanthanum complex, due different...
Confinement of a plasma initiated and heated by electron cyclotron-resonance-frequency waves has been studied in the Heliotron-E. The observed parameters were ${T}_{e}=500\ensuremath{-}100$ eV, ${T}_{i}\ensuremath{\simeq}100$ ${\overline{n}}_{e}=4\ifmmode\times\else\texttimes\fi{}{10}^{12}$ ${\mathrm{cm}}^{\ensuremath{-}3}$ at $B=10$ kG. energy decay time was 40\ifmmode\pm\else\textpm\fi{}8 msec particle confinement estimated to be more than 70 msec. These results offer considerable...
Access to the MHD second stability regime has been achieved in ATF torsatron. Experimental \ensuremath{\beta} values (${\ensuremath{\beta}}_{0}$\ensuremath{\le}3%, with fast ions contributing \ensuremath{\approxeq}(1/3 of pressure at high \ensuremath{\beta}) are well above theoretical transition value (${\ensuremath{\beta}}_{c}$\ensuremath{\approxeq}1.3% for ideal modes) required reach this regime. The relatively low ${\ensuremath{\beta}}_{c}$ results from operation peaked profiles. measured...
Abstract The high-precision gamma-ray spectrometer (GRS) on the lunar polar orbiter SELENE is designed to measure 200 keV—12 MeV gamma rays in order determine elemental compositions of surface. GRS consists a large germanium (Ge) crystal as main detector and massive bismuth germanate plastic scintillator anticoincidence detectors. Ge cooled by Stirling cryocooler with its compressor attached passive radiator facing cold space. cooling system maintains below 90 K during observation. flight...
Electron-cyclotron and neutral-beam heating have been used to produce currentless plasma with $〈\ensuremath{\beta}〉\ensuremath{\approx}(1\ensuremath{-}2)%$ in the Heliotron-$E$ device. For moderately peaked profiles, magnetohydrodynamic activity that peaks at $t=1$ surface has observed. The characteristics of fluctuations are consistent theoretical expectations for an $m=1$ pressure-driven instability. is associated particle energy losses but not yet directly linked global confinement.
Reactions of M(CH2Ph)4 (M = Zr, Hf) with various α-diimine ligands afforded amido-imino or diamido complexes through intramolecular benzylation the C═N bonds ligands. Selective ligands, i.e., single- and double-benzylation, was accomplished by varying substituent on nitrogen atom imine moiety ligand backbone. Kinetic analysis second step indicated that benzyl group migrated from metal center to via an ordered four-center transition state (ΔS⧧ −3(4) eu for 3a; −5(9) 5b). Upon activation...