A5026711663- Magnetic Properties of Alloys
- Advanced MIMO Systems Optimization
- Magnetic properties of thin films
- Nonlinear Waves and Solitons
- Cooperative Communication and Network Coding
- Nonlinear Photonic Systems
- Rare-earth and actinide compounds
- Millimeter-Wave Propagation and Modeling
- Magnetic Properties and Applications
- Energy Harvesting in Wireless Networks
- Numerical methods for differential equations
- High-pressure geophysics and materials
- Advanced Differential Equations and Dynamical Systems
- Advanced Wireless Communication Techniques
- Physics of Superconductivity and Magnetism
- Meat and Animal Product Quality
- Freezing and Crystallization Processes
- Craniofacial Disorders and Treatments
- Algebraic structures and combinatorial models
- Sensory Analysis and Statistical Methods
- Polynomial and algebraic computation
- Advanced Mathematical Physics Problems
- Microwave Dielectric Ceramics Synthesis
- Fungal Biology and Applications
- Hydrogen Storage and Materials
KDDI Research (Japan)
2021-2025
Aichi Gakuin University
2021-2025
Hanoi Medical University
2025
University of Southern California
2022-2023
Toyota Motor Corporation (Japan)
2014-2022
University of California, Davis
2020
Sheffield Hallam University
2020
University of York
2020
Universität für Weiterbildung Krems
2020
University of Exeter
2020
An extension of nonlinear evolution equations to higher orders is investigated. Included are (i) a order Sawada-Kotera equation which cannot be derived from the functional derivative conserved quantities equation; (ii) N -soliton solution and inverse scattering form for (iii) solutions, Bäcklund transformation modified K-dV equations; (iv) list several bilinear some conjectured have 3-soliton solutions.
Resonances of solitons in one-dimensional space are studied theoretically taking the Sawada-Kotera equation with a nonvanishing boundary condition as an example. Two near resonant state exhibit new phenomena. They interact each other through emitting and absorbing third soliton. transmuted into singular after colliding other. at fuse other, or soliton splits two solitons.
The coercive field of permanent magnets decreases with increasing grain size. size dependence coercivity is explained by a dependent demagnetizing factor. In Dy free Nd2Fe14B magnets, the factor ranges from 0.2 for 55 nm to 1.22 8300 nm. comparison experimental data micromagnetic simulations suggests that in hard due non-uniform magnetostatic polyhedral grains.
Ce-based R2Fe14B (R= rare-earth) nano-structured permanent magnets consisting of (Ce,Nd)2Fe14B core-shell grains separated by a non-magnetic grain boundary phase, in which the relative amount Nd to Ce is higher shell magnetic than its core, were fabricated Nd-Cu infiltration into hot-deformed magnets. The coercivity values infiltrated structured are superior those as-hot-deformed with same overall content. This attributed value magnetocrystalline anisotropy phase compared homogeneous...
Background Cleft lip and/or palate (CL/P) are congenital malformations that require multidisciplinary treatment and in-depth knowledge for effective management, especially in countries like Vietnam, where the incidence rate is 1.4 per 1,000 live births. This study aimed to develop validate a questionnaire assess awareness, knowledge, attitudes of undergraduate medical dental students at Hanoi Medical University, regarding CL/P management. Materials methods The was administered using Google...
We investigate solutions to the two-dimensional Toda lattice equation and related ones including (i) cylindrical (ii) in coordinates (iii) discrete where symbols Δ+l Δ−m are forward backward difference operators, respectively. Exact all of them expressed with Casorati determinants.
A 61-year-old male with leukemia manifested multiple cutaneous nodules on his whole body surface, subcutaneous arms and a tongue tumor. Septate hyphae were observed microscopically in scrapings from the surfaces of lesions. Fusarium solani F. anthophilum isolated several skin Histological examination revealed presence numerous septate lumina vessels dermis. The fungal elements tissues suggested to be by an immunoperoxidase method using genus-specific anti-Fusarium antibody. Although no...
The direct method of calculating the multi-periodic wave solutions by Nakamura are applied to following equations; Korteweg-de Vrics equation, Toda Sawada-Kotera equation and model for shallow water waves, obtained three-periodic expressed in terms Riemann's θ-function. All parameters determining characters numerically.
The rare-earth (R) uniaxial anisotropy of R2Fe14B compounds with magnetic R atoms (e.g., Nd or Pr) is at the origin exceptional hard properties achieved in magnets based on these compounds. found Ce2Fe14B attributed mainly to magnetism Fe. Ce most abundant element and there has been much recent effort fabricate which partially substituted for Nd. In present neutron study (R1−xCex)2Fe14B (R = La Nd), enter phase over entire composition range. crystallographic parameters decrease increasing...
Measurements of the propagation channels in real-world environments form basis all realistic system performance evaluations, as foundation statistical channel models or to verify ray tracing. This is also true for analysis cell-free massive multi-input multi-output (CF-mMIMO) systems. However, such experimental data are difficult obtain, due complexity and expense deploying tens hundreds sounder nodes across wide area a CF-mMIMO expected cover, especially when different configurations number...
Nd 2 Fe 14 B has generated significant interest since its discovery in the 1980s due to impressive energy density, which makes it a prime candidate for use permanent magnet applications. Its performance is known suffer greatly at high temperatures required motor applications around 450K. Core/shell nanocomposites provide potential route improve material by combining highly anisotropic with moment and Curie temperature. We have used an atomistic spin model investigate magnetic properties of...
In this paper compartmental systems are modeled by a class of linearly parameterized matrix pairs and the controllability characteristics expressed in terms graph. The result gives intuitive physical information about it extends well-known on single-sink case to multisink case. Furthermore, is applied more special models, called undirected which such as liquid network systems, etc., can be concisely modeled.
Cell-free massive MIMO (CF-mMIMO) provides wireless connectivity for a large number of user equipments (UEs) using access points (APs) distributed across wide area with high spectral efficiency (SE). The energy (EE) the uplink is determined by (i) transmit power control (TPC) algorithms, (ii) numbers, configurations, and locations APs UEs, (iii) propagation channels between UEs. This paper investigates all three aspects, based on extensive (~30,000 possible AP 128 UE locations) channel...
Cell-free massive multiple-input multiple-output (CF-mMIMO) systems are expected to provide faster and more robust connections user equipments by cooperation of a number distributed access points (APs), be one the key technologies for beyond 5G (B5G). CF-mMIMO with multiple-antenna APs have been investigated from various viewpoints recently. However, no comprehensive analysis impact antenna distribution on system performance has done so far, which is important practical deployment. Besides...
We report the results of a comparative study magnetic microstructure textured and isotropic $\mathrm{Nd}_2\mathrm{Fe}_{14}\mathrm{B}/\alpha$-$\mathrm{Fe}$ nanocomposites using magnetometry, transmission electron microscopy, synchrotron x-ray diffraction, and, in particular, small-angle neutron scattering (SANS). Analysis data specimen computation correlation function spin misalignment SANS cross section suggests existence inhomogeneously magnetized regions on an intraparticle nanometer...
We propose a data assimilation method for evaluating the finite-temperature magnetization of permanent magnet over high-dimensional composition space. Based on general framework constructing predictor from two sets including missing values, practical scheme magnetic materials is formulated in which small number experimental limited space are integrated with larger first-principles calculation data. apply to...
[in Japanese]
Cell-free massive multiple-input multiple-output systems are expected to provide faster and more robust connections user equipments (UEs) by cooperation of a number distributed access points (APs). Energy efficiency (EE) is becoming an important indicator design operate networks; improve EE, use sleep-mode APs (SMA), also called AP switch on/off, for selected has been investigated. Although previous works analyze the performance SMA in presence user-centric clustering (UCC), these two...