A5081667035- Advanced Wireless Communication Techniques
- Advanced MIMO Systems Optimization
- Wireless Communication Networks Research
- Cooperative Communication and Network Coding
- Landslides and related hazards
- Blind Source Separation Techniques
- Advanced Adaptive Filtering Techniques
- Sparse and Compressive Sensing Techniques
- Full-Duplex Wireless Communications
- Advanced Wireless Network Optimization
- Optical Network Technologies
- Advanced Wireless Communication Technologies
- Relativity and Gravitational Theory
- Advanced Photonic Communication Systems
- Antenna Design and Analysis
- PAPR reduction in OFDM
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Direction-of-Arrival Estimation Techniques
- Indoor and Outdoor Localization Technologies
- Particle accelerators and beam dynamics
- Energy Harvesting in Wireless Networks
- Speech and Audio Processing
- Metal and Thin Film Mechanics
- Distributed Sensor Networks and Detection Algorithms
Kyoto University
2014-2024
Kyoto College of Graduate Studies for Informatics
2009-2024
Industrial Technology Center of Okayama Prefecture
2012-2024
Institute for Molecular Science
2001-2024
National Institutes of Natural Sciences
2024
Dokkyo Medical University Saitama Medical Center
2021-2022
Social Insurance Saitama Chuo Hospital
2019-2022
Gifu University
2022
RIKEN Center for Advanced Intelligence Project
2019-2021
Osaka City University
2017-2021
We present results for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ oscillation in the KEK to Kamioka (K2K) long-baseline neutrino experiment. K2K uses an accelerator-produced beam with a mean energy of 1.3 GeV directed at Super-Kamiokande detector. observed energy-dependent disappearance ${\ensuremath{\nu}}_{\ensuremath{\mu}}$, which we presume have oscillated ${\ensuremath{\nu}}_{\ensuremath{\tau}}$. The probability that would observe these if there is no 0.0050% ($4.0\ensuremath{\sigma}$).
This survey provides a brief introduction to compressed sensing as well several major algorithms solve it and its various applications communications systems. We firstly review linear simultaneous equations ill-posed inverse problems, since the idea of could be best understood in context equations. Then, we consider problem an underdetermined system with prior information that true solution is sparse, explain sparse signal recovery based on l1 optimization, which plays central role sensing,...
We present the results of indirect searches for Weakly Interacting Massive Particles (WIMPs), with 1679.6 live days data from Super-Kamiokande detector using neutrino-induced upward through-going muons. The search is performed by looking an excess high energy muon neutrinos WIMP annihilations in Sun, core Earth, and Galactic Center, as compared to number expected atmospheric neutrino background. No statistically significant was seen. calculate flux limits various angular cones around each...
We study Poincaré gauge theory with linear and quadratic Lagrangians, where there are the translation Lorentz fields whose sources energy-momentum tensor spin tensor, respectively. Ten parameters, a, α, β, γ, a1 , …, a6, contained in gravity action. Most general field equations covariant under group derived, also their alternative forms obtained. For geometrical analysis present space-time is that of Riemann-Cartan, endowed curvature torsion. General Relativity recovered when a source...
Particle spectrum of Poincaré gauge theory is investigated in detail, particular paticle's mass and energy. Besides usual graviton, the torsion field gives rise to massive 2+, 2-, 1+, 1-, 0+ 0- particles, each which obeys Klein-Gordon equation. We find that there are at most three normal defined by having positive energy; namely, only nine possible triplets, (2+, 0-), 0+, 0-) their parity conjugate, (1+, its conjugate finally 0-). Further reduction two one particles also provided 2+ 2-...
We apply the weak field approximation to most general gravitational equations in Poincaré gauge theory. The hµν is a multimass obeying fourth-order equation. In Newtonian we show that there are two routes arrive at potential. torsion decomposed into six irreducibe building blocks with spinparity, 2+, 2-, 1+, 1-, 0+ and 0-, each of which obeys Klein-Gordon Finally, construct possible candidate for massless graviton linearized Einstein
This paper presents a deep learning-aided iterative detection algorithm for massive overloaded multiple-input multiple-output (MIMO) systems where the number of transmit antennas $n$ is larger than that receive $m$ . Since proposed based on projected gradient descent method with trainable parameters, it named gradient-detector (TPG-detector). The internal such as step-size parameter, can be optimized standard learning techniques, i.e., back propagation and stochastic algorithms. approach...
We report the results for nucleon decay searches via modes favored by supersymmetric grand unified models in Super-Kamiokande. Using 1489 days of full Super-Kamiokande-I data, we searched $p\ensuremath{\rightarrow}\overline{\ensuremath{\nu}}{K}^{+}$, $n\ensuremath{\rightarrow}\overline{\ensuremath{\nu}}{K}^{0}$, $p\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{K}^{0}$, and $p\ensuremath{\rightarrow}{e}^{+}{K}^{0}$ modes. found no evidence any these set lower limits partial lifetime...
We study the equations of motion for test bodies and various limits in Poincaré gauge theory with linear quadratic Lagrangians. The classical are derived both spin-1/2 particles macroscopic bodies. It is also shown that can be taken, including General Relativity New Relativity.
We propose generic relay and subcarrier allocation schemes for multicarrier (MC) system with amplify-and-forward (AF) relays. The outage probability bounds are derived analytically each scheme. Simulation results show that these very tight better than the obtained straightforwardly from analysis in Single-Carrier (SC) case. This is because our we reckon increased degree of freedom brought by parallel channels. One proposed schemes, Average Best Relay Selection scheme, best suited practical...
In the Riemann-Cartan space-time we prove extended form of Bach-Lanczos identity, where δ denotes that infinitesimal variations in integral are taken with respect to both translation gauge field and Lorentz field, Fijmn stands for curvature tensor formed field; Fij=ηmnFimjn F=ηijFij. By virtue this there five independent invariants quadratic strength, when one derives equations from action principle.
This paper proposes signal detection schemes for massive multiple-input multiple-output (MIMO) systems, where the number of receive antennas is less than that transmitted streams. Assuming practical baseband digital modulation and taking advantage discreteness symbols, we formulate problem as a convex optimization problem, called sum-of-absolute-value (SOAV) optimization. Moreover, extend SOAV into weightedSOAV (W-SOAV) propose an iterative approach to solve W-SOAV with updating weights in...
The paper presents a deep learning-aided iterative detection algorithm for massive overloaded MIMO systems. Since the proposed is based on projected gradient descent method with trainable parameters, it named as descent-detector (TPG-detector). internal parameters can be optimized standard learning techniques such back propagation and stochastic algorithms. This approach referred to data-driven tuning brings notable advantages of scheme fast convergence. numerical experiments show that...
The aim of this study was to evaluate the possible role prostacyclin (PGI2) in pathogenesis hypertension spontaneously hypertensive rats (SHR).Measurement mRNA and protein levels PGH synthase (PGHS)-1, PGI2 receptor, thoracic aorta performed SHR aged 5, 10, 20, 40 weeks old age-matched normotensive Wistar-Kyoto (WKY) with a competitive polymerase chain reaction method immunoblotting. Aortic production 6-keto-PGF1 alpha, main metabolite PGI2, also measured.Compared WKY rats, PGHS-1 increased...
Received 10 November 2004DOI:https://doi.org/10.1103/PhysRevD.70.109901©2004 American Physical Society
One limiting issue in implementing high-speed wireless systems is the impairment associated with analog processing due to component imperfections. In uplink transmission of multiuser systems, a major source such in-phase/quadrature-phase imbalance (IQI) introduced at multiple transmitters. this paper, we deal orthogonal-frequency-division access (OFDMA) and single-carrier frequency-division (SC-FDMA) which have received attention recent years as physical layer protocol WiMAX 3GPP Long Term...
Radio resource allocation for downlink transmissions in a cellular system based on orthogonal frequency-division multiple access (OFDMA) has been the subject of many research studies over past few years. Nowadays, increasing attention turned to systems with relays, but only algorithms have designed OFDMA-based relay systems. In this paper, resource-allocation schemes are proposed cases one station (RS) and RSs cell. Due specific design these algorithms, which operate an RS-aided base...
The main objective of the Low Aspect Ratio Torus Experiment (LATE) device is to demonstrate formation spherical torus (ST) plasmas by electron cyclotron heating (ECH) alone without a centre solenoid and establish its physical bases. By injecting 2.45 GHz microwave pulse for 4 s, plasma current 1.2 kA spontaneously initiated P = 5 kW under weak steady vertical field Bv 12 G then ramped up slowly with slow ramp-up equilibrium loop finally reaches 6.3 30 at 70 G. This amounts 10% total coil...
In the conventional theory of conformal transformation metric tensor, only tensor fields can be treated. A general theoretical framework is presented such that both and spinor incorporated. We define a spinor, for which basis invariant, we also scale basis, invariant. It shown particular mixing gives rise to usual tensor. Furthermore, it proven Weyl's gauge field does not couple any elementary particle spin 1/2, quite independently its weight.