Yuya Nakamura
A5084714671- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Spacecraft Design and Technology
- Particle Detector Development and Performance
- Satellite Communication Systems
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Thin-Film Transistor Technologies
- Radiation Detection and Scintillator Technologies
- Silicon and Solar Cell Technologies
- Medical Imaging Techniques and Applications
- Silicon Nanostructures and Photoluminescence
- Particle Accelerators and Free-Electron Lasers
- Nutrition and Health in Aging
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Nuclear Materials and Properties
- Inflammatory Biomarkers in Disease Prognosis
- Gut microbiota and health
- Cancer, Lipids, and Metabolism
- Nuclear Engineering Thermal-Hydraulics
- Heat Transfer and Optimization
Kyushu University
2013-2024
Nagoya University
1989-2023
Okayama University of Science
2023
Kobe University
1993-2023
Gifu University
2023
Institution of Engineering and Technology
2023
Hosei University
2020-2023
Aichi University of Education
2017-2023
RIKEN Nishina Center
2023
Tokyo Institute of Technology
2013-2022
KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected standard assumptions about propagation at 99.95% C.L. In a 162 ton.yr exposure ratio observed inverse beta-decay to number without disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for energies >3.4 MeV. context two-flavor neutrino oscillations with CPT invariance, all solutions solar problem except "large mixing angle" region are excluded.
A new record conversion efficiency of 24.7% was attained at the research level by using a heterojunction with intrinsic thin-layer structure practical size (101.8 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , total area) 98-μm thickness. This is world height for any crystalline silicon-based solar cell (100 and above). Since we announced our former 23.7%, have continued to reduce recombination losses hetero interface between a-Si...
We present results of a study neutrino oscillation based on 766 ton-year exposure KamLAND to reactor anti-neutrinos. observe 258 \nuebar\ candidate events with energies above 3.4 MeV compared 365.2 expected in the absence oscillation. Accounting for 17.8 background events, statistical significance \nuebar disappearance is 99.998%. The observed energy spectrum disagrees spectral shape at 99.6% and prefers distortion from effects. A two-neutrino analysis data gives \DeltaMSq =...
Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found an expected background 1.1+/-0.4 events. This result can be obtain limit on nu;(e) fluxes any origin. Assuming that all flux its origin Sun and characteristic 8B solar nu(e) spectrum, we upper 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) flux. We interpret this limit, 2.8 10(-4) standard model flux, framework spin-flavor precession...
The Kamioka Liquid scintillator Anti-Neutrino Detector is used in a search for single neutron or two-neutron intranuclear disappearance that would produce holes the s-shell energy level of 12C nuclei. Such could be created as result nucleon decay into invisible modes (inv), e.g., n→3ν nn→2ν. deexcitation corresponding daughter nucleus results sequence space and time-correlated events observable liquid detector. We report on new limits one- disappearance: τ(n→inv)>5.8×1029 years...
During a hypothetical core-disruptive accident (CDA) in sodium-cooled fast reactor (SFR), degraded core materials can form roughly conically-shaped debris beds over the core-support structure and/or lower inlet plenum of vessel from rapid quenching and fragmentation material pool. However, coolant boiling may ultimately lead to leveling bed, which is crucial relocation molten heat-removal capability bed. To clarify mechanisms underlying this self-leveling behavior, large number experiments...
This paper reports the track multiplicity and kinematics of muons, charged pions, protons from charged-current inclusive $\bar{\nu}_{\mu}$ $\nu_{\mu}$ interactions on a water target, measured using nuclear emulsion detector in NINJA experiment. A 3-kg target was exposed to T2K antineutrino-enhanced beam with mean energy 1.3 GeV. Owing high-granularity emulsion, momenta down 200 MeV/$c$ neutrino-water were detected. We find good agreement between observed data model predictions for all...
Despite the widespread recognition of global concern regarding onset cardiovascular diseases in a significant number patients following cancer treatment, definitive strategies for prevention and treatment remain elusive. In this study, we established systems to evaluate influence anti-cancer drugs on quality control mitochondria, pivotal energy metabolism, using human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). Osimertinib, an epidermal growth factor receptor tyrosine...
Bifidobacterium longum BB536 supplementation can be used to regulate bowel movements in various people, including healthy subjects and patients with irritable syndrome (IBS); however, individuals vary their responses B. treatment. One putative factor is the gut microbiota; recent studies have reported that microbiota mediates effects of diet or drugs on host. Here, we investigated intestinal features, such as microbiome metabolome, related effectiveness increasing movement frequency....
Precise neutrino--nucleus interaction measurements in the sub-multi GeV region are important to reduce systematic uncertainty future neutrino oscillation experiments. Furthermore, excess of ${\nu_e}$ interactions, as a possible interpretation existence sterile has been observed such an energy region. The nuclear emulsion technique can measure all final state particles with low threshold for variety targets (Fe, C, H${_2}$O, and so on). Its sub-$\mu$m position resolution allows cross-section...
Recent studies have accumulated evidence that the intestinal environment is strongly correlated with host diet, which influences health. A number of dietary products whose mechanisms influence operate via gut microbiota been revealed, but they are still limited. Here, we investigated Chlorella , a green alga commercially available as supplement. randomised, double-blind, placebo-controlled crossover trial including 40 Japanese participants constipation was performed. In this study, primary...