A5063120024- Electromagnetic Scattering and Analysis
- Electromagnetic Simulation and Numerical Methods
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Electromagnetic Compatibility and Measurements
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Quantum Chromodynamics and Particle Interactions
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Photonic Crystals and Applications
- High-Energy Particle Collisions Research
- Robotic Locomotion and Control
- Numerical methods in inverse problems
- Nuclear physics research studies
- Interactive and Immersive Displays
- Microwave Imaging and Scattering Analysis
- Pulsars and Gravitational Waves Research
- Modular Robots and Swarm Intelligence
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced Numerical Analysis Techniques
- Optical and Acousto-Optic Technologies
- Robot Manipulation and Learning
- Liquid Crystal Research Advancements
Chuo University
2016-2025
Osaka University
1988-2024
The University of Tokyo
1990-2024
Kyoto Pharmaceutical University
2022
Toyohashi University of Technology
2017-2018
China Electronics Corporation (China)
2017
Toyama Prefectural University
2001-2015
Iwate University
2008
Kiryu University
2001-2007
Gunma University
2001-2007
In an emulsion-counter hybrid experiment performed at J-PARC, a $Ξ^-$ absorption event was observed which decayed into twin single-$Λ$ hypernuclei. Kinematic calculations enabled unique identification of the reaction process as $Ξ^{-} + ^{14}$N$\ \rightarrow\ ^{10}_Λ$Be $^5_Λ$He. For binding energy $Ξ^{-}$ hyperon in $Ξ^-$-$^{14}$N system value $1.27 \pm 0.21$ MeV deduced. The level is likely nuclear $1p$ state indicates weak $ΞN$-$ΛΛ$ coupling.
This article reviews the nature and history of discovery high-quality natural modes existing on periodic arrays many subwavelength scatterers; such can be viewed as specific periodically structured open resonators. These grating (GMs), like any other modes, give rise to associated resonances in electromagnetic-wave scattering absorption. Their complex wavelengths are always located very close (but not exactly at) well-known Rayleigh anomalies (RAs), determined only by period angle incidence....
Life-size humanoids which have the same joint arrangement as humans are expected to help in living environment. In this case, they require high load operations such gripping and conveyance of heavy load, holding people at care spot. However, these difficult for existing because their low output. Therefore, purpose study is develop highoutput life-size humanoid robot. We first designed a motor driver with featuring small, water-cooled, output, it performed higher output than utilizing. paper,...
A double-$\Lambda$ hypernucleus, ${}_{\Lambda\Lambda}\mathrm{Be}$, was observed by the J-PARC E07 collaboration in nuclear emulsions tagged $(K^{-},K^{+})$ reaction. This event interpreted as a production and decay of $ {}_{\Lambda\Lambda}^{\;10}\mathrm{Be}$, ${}_{\Lambda\Lambda}^{\;11}\mathrm{Be}$, or ${}_{\Lambda\Lambda}^{\;12}\mathrm{Be}^{*}$ via $\Xi^{-}$ capture ${}^{16}\mathrm{O}$. By assuming atomic 3D state, binding energy two $\Lambda$ hyperons$\,$($B_{\Lambda\Lambda}$) these...
We investigate the emission of waves by a thin silver nanostrip placed into center circular quantum wire (QWR), in visible-light range. Our analysis uses mathematically grounded approach called lasing eigenvalue problem (LEP). Keeping mind that at threshold lasing-mode frequency is real valued (does not attenuate time), LEP formulated as boundary-value for Maxwell equations with exact boundary conditions and Sommerfeld radiation condition. The eigenvalues are pairs numbers, where first...
Abstract The diffraction by a finite parallel‐plate waveguide cavity with perfect electric conductor loading is rigorously analysed for the E‐polarised case using Wiener–Hopf technique. By taking Fourier transform to unknown scattered field and applying boundary conditions in transformed domain, problem formulated terms of simultaneous equations. These equations are solved factorisation decomposition procedure. solution exact but formal because it involves branch‐cut integrals integrands an...
Abstract The Editors thank the 2024 peer reviewers. As you are aware, journal Radio Science (RDS) publishes original research papers on electromagnetic propagation and its applications. In 2024, we received a total of 206 manuscripts for consideration publication in RDS. We tried very carefully to find reviewers who were best fit topics manuscripts. You worked hard peer‐review process gave us excellent evaluations. Our would never have kept high reputation without your continued efforts....
As a generalization of the Gamma function defined for single complex variable, new special called generalized function, two variables and positive integer, is introduced, several important analytical properties are investigated in detail, which include regularity, asymptotic expansions analytic continuations. Furthermore, as closely related to incomplete also some fundamental briefly.
A new method of free-form deformation, t-FFD, is proposed. An original shape large-scale polygonal mesh or point-cloud deformed by using a control mesh, which constituted set triangles with arbitrary topology and geometry, including the cases disconnection self-intersection. For modeling purposes, designer can handle directly indirectly, also locally globally. This works on simple mapping mechanism. First, each point parametrized local coordinate system triangle mesh. After modifying mapped...
The diffraction of a plane electromagnetic wave by thick strip grating is solved rigorously the Wiener-Hopf technique. solution contains an infinite number unknowns, which are shown to satisfy certain set equations. By applying modified residue calculus technique, this equations and approximate derived. Representative numerical examples given transmission characteristics discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
High-frequency diffraction by a strip was previously analyzed approximately the Geometrical Theory of Diffraction (GTD), but GTD solution has an essential difficulty that it is valid only in limited range incidence and observation angles. To overcome this difficulty, paper, plane wave reconsidered using Wiener-Hopf technique complete high-frequency asymptotic obtained, which uniformly everywhere space no restrictions on Further expansion also carried out to derive non-uniform solution,...
We propose a strategy for robot to operate in an environment with movable obstacles using only onboard sensors, no previous knowledge of the objects that environment. Movable are detected active sensing and color range sensor, when obstacle is moved, perception reconstructed. Active defined as classification object either or static after tries push its arm. This collectively based on force sensor inputs, joint angles, inputs. In order gather information from environment, we use consisting...
The diffraction of a plane electromagnetic wave by an open-ended parallel plate waveguide cavity with planar termination is rigorously analyzed for the E -polarized case using Wiener-Hopf technique. Introducing Fourier transform unknown scattered field and applying boundary conditions in domain, problem formulated terms simultaneous equations, which are solved via factorization decomposition procedure. solution exact but formal since branch-cut integrals integrands infinite number unknowns...
In order to achieve robots' working around humans, safe contacts against objects, and environments with broad area of their body should be allowed. Furthermore, it is desirable actively use those for achieving tasks. Considering that, many practical applications will realized by whole-body close interaction others. Therefore, robots are strongly expected behavior objects them. Recently, becomes possible construct tactile sensor network the advancement research sensing system. Using such...
In the Wiener-Hopf analysis of wave scattering problems related to modified geometries, solutions often contain infinite branch-cut integrals with unknown integrands and/or series coefficients. It is therefore required evaluate these and appropriately in order for be complete. this paper, we shall investigate arising boundary value develop efficient methods obtaining approximate based on a rigorous asymptotics. Applications results specific are discussed. Some numerical radar cross section...
Three mathematical models based on approximate surface integral equations for electromagnetic analysis of scalar wave scattering from thin extended target are considered.Such include different systems the second kind singular determined median.The effective algorithm direct (without preliminary regularization) numerical solution is special quadrature formulae integrals.Verification and their comparison performed in case penetrable cylindrical shell homogeneous non-magnetic medium.
The diffraction by a thin material strip is analyzed for the H-polarized plane wave incidence using Wiener-Hopf technique together with approximate boundary conditions. An asymptotic solution obtained case where thickness and width of are small large compared wavelength, respectively. scattered field evaluated asymptotically based on saddle point method far expression derived. Scattering characteristics discussed in detail via numerical results radar cross section.
The diffraction of a plane electromagnetic wave by an inclined parallel plate grating is treated using the Weiner-Hopf technique. problem formulated in terms single Wiener-Hopf equation, which then factorization and decomposition procedure. solution exact but formal sense that there infinite number unknowns. Approximation procedures are presented two forms approximate derived. Based on above analysis, numerical examples given transmission characteristics discussed.< <ETX...
The problem of diffraction an electromagnetic field by a locally nonhomogeneous body in perfectly conducting waveguide rectangular cross section is considered. This reduced to solving volume singular integral equation (VSIE). examination this based on the analysis corresponding boundary value (BVP) for system Maxwell's equations and equivalence BVP VSIE. existence uniqueness VSIE space square-integrable functions are proved. A numerical Galerkin method solution proposed, its convergence
The difiraction by a semi-inflnite parallel-plate waveguide with sinusoidal wall corrugation is analyzed for the E-polarized plane wave incidence using Wiener-Hopf technique together perturbation method. problem formulated in terms of simultaneous equations introducing Fourier transform unknown scattered fleld and applying approximate boundary conditions domain. Employing factorization decomposition procedure series expansion, zero- flrst-order solutions are obtained. Explicit expressions...