A5015557320- Advanced MIMO Systems Optimization
- Cooperative Communication and Network Coding
- Wireless Communication Networks Research
- Antenna Design and Analysis
- Magnetic confinement fusion research
- Magnetic properties of thin films
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Advanced Wireless Communication Techniques
- Superconducting Materials and Applications
- Energy Harvesting in Wireless Networks
- Microwave Engineering and Waveguides
- Magnetism in coordination complexes
- Advanced Wireless Network Optimization
- Electron and X-Ray Spectroscopy Techniques
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Antenna Design and Optimization
- Particle accelerators and beam dynamics
- Quantum and electron transport phenomena
- Full-Duplex Wireless Communications
- X-ray Diffraction in Crystallography
- Advanced Condensed Matter Physics
- Telecommunications and Broadcasting Technologies
- Semiconductor materials and devices
Hiroshima University
2010-2024
Osaka University
1986-2020
University of Fukui
2016-2018
National Institute for Fusion Science
2007-2018
Peking University First Hospital
2017
Peking University
2017
National Institute of Advanced Industrial Science and Technology
2017
University of Electro-Communications
2007-2016
Berry (United States)
2015
Japan Atomic Energy Agency
2006-2015
Magnetic circular x-ray dichroism (MCXD) measurements at the Co ${L}_{2,3}$ and ${M}_{2,3}$ core edges reveal a strongly enhanced perpendicular orbital moment ( ${m}_{\mathrm{orb}}$) in Co/Pt multilayers which show magnetic anisotropy (PMA). MCXD signals Pt ${N}_{6,7}$ ${O}_{2,3}$ edges, arising from $5d\ensuremath{-}\mathrm{Co}3d$ hybridization, persist for thinnest layer. The hybridization is shown to be localized interface cause ${m}_{\mathrm{orb}}$ enhancement drives PMA. Unambiguous...
The forthcoming mobile communication systems are expected to provide a wide variety of services, from high-quality voice high-definition videos, through high data rate wireless channels anywhere in the world. requires broad frequency bands, and sufficient broadband can be achieved higher bands such as microwave, Ka-band, millimeter-wave. Broadband have connected fixed networks Internet local area networks. future-generation will include not only cellular phones, but also many new types...
A novel transmitter diversity scheme that generates forced fading to improve the performance of channel coding is proposed and investigated. Since required phase sweeping frequency much smaller than transmission bit rate, bandwidth expansion negligible. sinusoidal function Delta Theta sin(2 pi f/sub H/t) employed in laboratory experiments using 32 kbit/s quarternary differential shift keying (QDPSK) with detection BCH(23,12) code. It shown =200 degrees H/=67 Hz can be used when m...
The first experimental demonstration of the generation a radially polarized optical beam mode by laser oscillation is reported. In experiment, new type discharge tube having windows perpendicular to optic axis used, and newly designed conical selector inserted in resonator.
We have successfully demonstrated an 8-bit microprocessor using passive transmission lines based on single-flux-quantum LSI technology. In the designed here, called CORE1/spl alpha/6, a simple bit-serial architecture with seven instructions was employed. floor plan consideration toward integration of memory, and superconductive (PTLs) were used to connect circuit blocks. Utilization PTLs helped us reduce propagation delay in long interconnections. The design flexibility enhanced performance...
The complete operation of a microprocessor prototype based on the single-flux-quantum (SFQ) logic is described. 8b SFQ microprocessor, fabricated using niobium Josephson-junction technology, performs computation at 15.2GHz clock rate with power consumption 1.6mW. /spl mu/P contains 5000 Josephson junctions and 1300 cells 5mm/sup 2/ IC.
The growth in mobile multimedia services will accelerate over the next decade. This paper discusses service aspects and system requirements for fourth generation communication (4G) that allow us to provide higher-speed communications deal with user demand also proposes a new radio access network (RAN) structure suited 4G system. principles of proposed cluster-cellular RAN are localized handover processing horizontal structure. advantages discussed.
I. Introduction (Z. Lin, G. Y. Fu, J. Q. Dong) II. Role of theory and simulation in fusion sciences 1. The Impact on tokomak experiments (H. R. Wilson, T.S. Hahm F. Zonca) 2. Tokomak Transport Physics for the Era ITER: Issues Simulations (P.H. Diamond Hahm) III. Status modeling Nonlinear Governing Equations Plasma (T. S. Equilibrium stability (L.L. Lao, Manickam) 3. (R.E. Waltz) 4. MHD (G.Y. Fu) 5. Turbulence Lin R.E. 6. RF heating current drive (D.A. Batchelor) 7. Edge physics (X.Q. Xu C.S....
Software-defined radio technologies are attractive for future mobile communication systems because of reconfigurable and multimode operation capabilities. The feature is useful enhancing functions equipment without replacing hardware. Multimode essential wireless terminals a number standards will still coexist. Research efforts on SDR have become very active in Japan, various kinds prototypes been developed. This article introduces the trends Japanese role systems. R&D activities field...
An eight-bit SFQ processor has been designed and some key components have tested to confirm feasibility of the large-scale digital circuit. The is composed a one-bit ALU, two registers with local clock generators, an instruction register, five-bit program counter, state controller, 32-byte register file. A bit-serial architecture distributed architecture, where each its own generator, employed in order increase frequency. target frequency 16 GHz 10 for NEC 2.5 kA/cm/sup 2/ Hypres 1 Nb...
This work reports a theoretical x-ray absorption near-edge structure (XANES) spectroscopy study at the Ti K-edge in TiO2 rutile. We present detailed ab initio computations of XANES spectrum performed within multiple-scattering framework. An extensive discussion is presented concerning size cluster needed to reproduce experimental spectrum, especially regarding split main line. In addition, role exchange and correlation potential (ECP) reproducing all features discussed. The best agreement...
Recently, the service of cellular phone which is dependent on location spreading widely. Various techniques are suggested for estimation in indoor, however, indoor have many subjects with a cost and an aspect accuracy. To deal these subjects, we propose quite new hybrid method paying attention to smart built-in Wi-Fi camera. The proposal able realized both highly accuracy low by using two-dimensional marker, base stations, radio wave strength ad hoc communications. Verified simulation was...
The design parameters and experimental results for a proposed time-division multiple access (TDMA) digital mobile system are shown. related network architecture, frame structure, signaling structure given. has three-slot TDMA, pi /4 shifted QPSK (quadrature phase shift keying), 25 kHz carrier spacing. A spectrum-efficient can be realized by using radio transmission techniques, such as diversity, bidirectional feed control amplifier, robust CODECs. Field experiments have verified the...
L-Aspartyl-aminomalonic acid diesters are representatives of new group sweet compounds. Chemical synthesis the dipeptide esters was effected by coupling carbobenzoxy-β-benzylaspartic with an aminomalonic diester conventional activated ester method, followed catalytic hydrogenation to remove protecting groups. Among 21 products, trans-2-methyl-cyclohexyl, methyl over 5000 times sweeter than sucrose, 2, 6-dimethyl-cyclohexyl, methyldiester about and fenchyl, 20000 sweeter. These compounds...
A small-size printed inverted-L monopole wideband antenna for mobile application is presented. The simply structured with an L-strip, which occupies a small area of 10 × 14 mm2 on the top portion substrate. simple matching circuit using lumped elements used to introduce two resonance frequencies and further enhance bandwidth. proposed achieves dB impedance bandwidth from 2.23 GHz more than 4 GHz, can cover WLAN2400 WiMAX2300/2500/3500 operation bands, omnidirectional radiation patterns were...
We have designed, implemented and tested several circuit components of a prototype the SFQ microprocessor, CORE1.The CORE1 is synchronously clocked 8-bit microprocessor based on bit-serial architecture.We designed its using cell-based design approach an automated top-down CAD environment.We successfully obtained correct operations all components, including instruction register, program counter controller.
The great success of the i-mode service shows that data communication services are becoming accepted in mobile world. Multimedia will be provided by 3rd generation IMT-2000 systems next year Japan. Thus, time has come to begin research and development for 4th (4G) systems. There exist many difficult issues 4G systems, such as frequency resources, additional investment, higher speed wireless transmission technology so on. Furthermore, a new concept must discussed before solving these issues....