A5079060909- Advanced X-ray Imaging Techniques
- Polymer Nanocomposites and Properties
- Advanced Memory and Neural Computing
- X-ray Spectroscopy and Fluorescence Analysis
- Polymer crystallization and properties
- Enzyme Structure and Function
- Protein Structure and Dynamics
- Photonic and Optical Devices
- Medical Imaging Techniques and Applications
- X-ray Diffraction in Crystallography
- Cardiomyopathy and Myosin Studies
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- Material Dynamics and Properties
- Neural dynamics and brain function
- Crystallography and Radiation Phenomena
- Block Copolymer Self-Assembly
- Surfactants and Colloidal Systems
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- Neural Networks and Applications
- Semiconductor materials and devices
- Liquid Crystal Research Advancements
- biodegradable polymer synthesis and properties
- Force Microscopy Techniques and Applications
Osaka University of Pharmaceutical Sciences
2023-2025
Japan Synchrotron Radiation Research Institute
2007-2021
The University of Tokyo
2009-2018
Hiroshima University
2008-2017
Japan Science and Technology Agency
2006-2014
Kanagawa University
2013
Centre for Research in Engineering Surface Technology
2011-2012
National Institute of Advanced Industrial Science and Technology
2012
Hokkaido University
2000-2011
University of Tsukuba
2004-2008
Significance Understanding ultraintense light–matter interactions is an intriguing subject from viewpoints of basic science and practical applications. For the X-ray region, such research fields have opened up with emergence free-electron lasers (XFELs). By using X-ray–X-ray pump–probe scheme, we firstly measured atomic response to XFEL light femtosecond–ångstrom time–space resolutions. It was found that position freezing until 20 fs after irradiation, which supports feasibility damageless...
In order to obtain reliable data on d values and integrated intensities, an imaging plate (IP) has been applied high-pressure diffraction experiments with a diamond anvil cell using synchrotron radiation. The IP was found be more effective than conventional x-ray film by factor of 30, energy dispersive method several times. integrate the intensity IP, histogram successfully developed. This combination proved give lattice constant relative accuracy 2×10−4, observed intensities which...
The unit device consists of four tunnel junctions and operates as a two-way switch for single-electron transport. Any combinational logic can be implemented by connecting identical devices into cascade to build the tree BDD graph. Several sample designs are presented circuits NAND, NOR, exclusive-OR, AND-OR logic. Computer simulation shows that designed perform operations correctly.
Rotation of the plane polarization following transmission a synchrotron x-ray beam through thin sample has been directly observed. Within few eV cobalt K-absorption edge, rotations up to 2 mrad were obtained in cubic ${\mathrm{Co}}_{0.9}$${\mathrm{Fe}}_{0.1}$, and somewhat less metallic glass chiral organometallic samples. These effects observed using high-extinction tunable perfect-crystal Bragg-reflection polarimeter novel design which can detect optical as small 70 \ensuremath{\mu}rad.
In the energy transduction of muscle contraction, it is important to know nature and extent conformational changes head portion myosin molecules. presence magnesium adenosine triphosphate (MgATP), fairly large [subfragment-1 (S1)] in solution were observed by small-angle x-ray scattering with use synchrotron radiation as an intense stable source. The MgATP reduced radius gyration molecule about 3 angstrom units maximum chord length 10 angstroms, showing that shape S1 becomes more compact or...
An integrating x-ray area detector that operates on the basis of laser-stimulated luminescence was used in a diffraction study muscle contraction. The has dynamic range 1 to 10 5 , sensitivity about 60 times greater with approximately 1/300 as much fog background film. It is erasable and reusable but, like film, can integrate at practically unlimited counting rate. high wide resulted sufficient reduction exposure time make possible recording clear pattern, up 2.0-nanometer axial spacing,...
Small-angle X-ray scattering experiments for supercritical CO2 have been carried out. In the previous study, it was pointed out that correlation lengths and density fluctuations form a ridge along extension of coexistence curve to region singular points various quantities are also on this curve. The present in better experimental conditions, confirms preliminary results correct shows dependence fluctuation length differs across boundary curve, which we argue correspond higher-order phase transition.
We describe a majority-logic gate device suitable for use in developing single-electron integrated circuits. The consists of capacitor array input summation and an irreversible box threshold operation. It accepts three binary inputs produces corresponding output, complementary by using the change its tunneling caused signals; it logical 1 output if two or are 0 1. combined several these devices to form subsystems, shift register full adder, confirmed their operation computer simulation. is...
A large-aperture (150 mm and 230 in diameter) x-ray TV-type detector has been developed for diffraction with synchrotron radiation. The consists of a beryllium-windowed image intensifier, an optical lens, charge coupled device (CCD) sensor, data acquisition system. spatial resolution is 270 μm(FWHM), the dynamic range 6000:1. noise level quantum limited. nonuniformity response distortion corrected by software. When TV-rate (NTSC-mode) CCD used as time-resolved measurements rate 30 frame/s...
The phase behavior of PPO (sn-1,2-dipalmitoyl-sn-3-oleoylglycerol) and POP (sn-1,3-dipalmitoyl-sn-2-oleoylglycerol) binary mixture was examined using differential scanning calorimetry, conventional synchrotron radiation X-ray diffraction (XRD), highly pure samples. A molecular compound, βC, formed at the 1:1 concentration ratio POP, giving rise to two monotectic phases PPO/compound compound/POP in a juxtapositional way. βC has long spacing value 4.1 nm double chain length structure. In...
This paper proposes an all-analog neural network LSI architecture and a new learning procedure called contrastive backpropagation learning. In analog LSI's with on-chip learning, inevitable offset errors that arise in the circuits seriously degrade performance. Using proposed here, are canceled to large extent effect of on performance is minimized. also describes prototype 9 neurons 81 synapses based which capable continuous neuron-state continuous-time operation because its fully parallel...
The structure of slide-ring (SR) gels in various types solvents was investigated by small-angle X-ray scattering (SAXS). SR have a unique characteristic called the "pulley effect" that cross-links made α-cyclodextrin molecules figure-eight shape can slide along polymer chain. SAXS results show that, poor solvent, sliding form aggregates prevent pulley effect, while chains freely pass through acting like pulleys good solvent. A vertically elliptic pattern observed two-dimensional profiles for...
Polymorphic crystallization of SOS (sn-1,3-distearoyl-2-oleoyl glycerol) has been studied with a time-resolved synchrotron radiation X-ray diffraction method (SR-XRD) using pure samples. five polymorphs: α, γ, β', β2, and β1. Emphasis was placed on analyzing the events melt-mediated transformation, in which more stable forms (γ, β2) induced by rapid melting less forms. This mode is closely related to long running dispute concerning "memory effect" possibly occurring polymorphic...
Synchrotron x-ray diffraction studies using a diamond-anvil cell and an imaging plate reveal that solid bromine begins to undergo molecular-to-monatomic phase transition near 80 GPa. The structure of the high-pressure is found be body-centered orthorhombic (${D}_{2h}^{25}$-Immm), as previously observed in iodine above 21 These results on plus previous data monobromide show molecular dissociation takes place when scaled unit-cell volume v\ifmmode \tilde{}\else \~{}\fi{}=v/8${r}_{s}^{3}$...
New tiling patterns with complex arrangements have been identified for ABC star-shaped terpolymers and ABC/A/B copolymer/homopolymer blends characterized by transmission electron microscopy microbeam small-angle X-ray scattering. The samples are composed of polyisoprene (I), polystyrene (S), poly(2-vinylpyridine) (P), whose volume ratios I:S:P 1.0:1.8:X, where X covers the range 0.8 ≤ 3.2. other series type I1.0SYP2.0 Y in 1.1 2.7 was also prepared adding I or S homopolymers to I1.0S1.8PX....
The process of rearranging lamella crystal structures in isotactic polypropylene (iPP) and butene randomly copolymerized iPP (bPP) spherulites during hot drawing was investigated by in-situ microbeam small-angle X-ray scattering (SAXS)−wide-angle (WAXS)−polarized optical microscopy (POM) simultaneous measurements. We subjected a fixed position an upper quadrant spherulite, which is stretched the horizontal direction, to irradiation, observed local structural changes, such as those ordered...