A5049756694- Gamma-ray bursts and supernovae
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Ferroelectric and Piezoelectric Materials
- Particle physics theoretical and experimental studies
- Advanced Surface Polishing Techniques
- Astro and Planetary Science
- Advanced Glycation End Products research
- Cardiovascular Function and Risk Factors
- Bladder and Urothelial Cancer Treatments
- Ferroelectric and Negative Capacitance Devices
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Amino Acid Enzymes and Metabolism
- Nitric Oxide and Endothelin Effects
- Atrial Fibrillation Management and Outcomes
- Urinary and Genital Oncology Studies
- Advanced ceramic materials synthesis
- Cancer, Hypoxia, and Metabolism
- Dark Matter and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Metabolism and Genetic Disorders
- Advanced Memory and Neural Computing
Osaka University of Pharmaceutical Sciences
2022-2025
Fukuoka University
2016-2024
The University of Tokyo
2004-2024
Fujitsu (Japan)
2012-2024
Osaka Medical and Pharmaceutical University
2023
Hokusei Gakuen University
2010-2019
Nara Institute of Science and Technology
2017-2018
Tohoku University
2015-2017
Kyoto University
2016-2017
Waseda University
2013-2017
The comparatively high coercive field in Hf0.5Zr0.5O2 (HZO) and other HfO2-based ferroelectric thin films leads to two critical challenges for their application embedded memory: operating voltage due a large thickness-field product poor endurance the close breakdown field. In this study, we demonstrate that thickness scaling of HZO down 4 nm is promising approach overcome these challenges. As scales almost linearly with film thickness, reduced 0.6 V one-shot operation 1.2 stable memory...
A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data Super-Kamiokande detector. This analysis looked electron-type antineutrinos that had produced a positron with an energy greater than 18 MeV. In absence signal, 90% C.L. upper limits on total flux were set several theoretical models; these ranged 20 to 130 macro nu(e) cm(-2) s(-1). Additionally, bound 1.2 s(-1) supernova neutrino in region E(nu)>19.3
The next Galactic supernova is expected to bring great opportunities for the direct detection of gravitational waves (GW), full flavor neutrinos, and multi-wavelength photons. To maximize science return from such a rare event, it essential have established classes possible situations preparations appropriate observations. this end, we use long-term numerical simulation core-collapse (CCSN) 17 solar-mass red supergiant progenitor self-consistently model multi-messenger signals in GW,...
The birth properties of neutron stars yield important information on the still debated physical processes that trigger explosion and intrinsic neutron-star physics. These include high space velocities young with average values several 100 km/s, whose underlying "kick" mechanism is not finally clarified. There are two competing possibilities could accelerate NSs during their birth: anisotropic ejection either stellar debris or neutrinos. We here present new evidence from X-ray measurements...
ABSTRACT We present results from a self-consistent, non-rotating core-collapse supernova simulation in three spatial dimensions using binary evolution progenitor model of SN 1987A. This $18.3\, \mathrm{M}_{\odot }$ is evolved slow merger 14 and $9\, stars, it satisfies most the observational constraints such as red-to-blue evolution, lifetime, total mass, position Hertzsprung–Russell diagram at collapse, chemical anomalies. Our initiated spherically symmetric collapse mapped to...
We present an overview of two-dimensional (2D) core-collapse supernova simulations employing neutrino transport scheme by the isotropic diffusion source approximation. study 101 solar-metallicity, 247 ultra metal-poor, and 30 zero-metal progenitors covering zero-age main sequence mass from $10.8 M_{\odot} $ to $75.0 $. Using 378 in total, we systematically investigate how differences structures these multiple impact hydrodynamics evolution. By following a long-term evolution over 1.0 s after...
Abstract Mapping supernovae to their progenitors is fundamental understanding the collapse of massive stars. We investigate red supergiant problem, which concerns why supergiants with masses ∼16–30 M⊙ have not been identified as Type IIP supernovae, and supernova rate observed cosmic smaller than star formation rate. find key physics solving these in compactness parameter, characterizes density structure progenitor. If stars above ξ2.5 ∼ 0.2 fail produce canonical (i) mass range 16–30...
Accurate description of neutrino opacities is central both to the core-collapse supernova (CCSN) phenomenon and validity explosion mechanism itself. In this work, we study in a systematic fashion role variety well-selected CCSN simulations where multi-energy, three-flavor transport solved by isotropic diffusion source approximation (IDSA) scheme. To verify our code, first present results from one-dimensional (1D) following core-collapse, bounce, up ~ 250 ms postbounce 15 $M_{\odot}$ star...
The JHF-Kamioka neutrino project is a second generation long base line oscillation experiment that probes physics beyond the Standard Model by high precision measurements of masses and mixing. A intensity narrow band beam produced secondary pions created proton synchrotron at JHF (JAERI). energy tuned to maximum ~1 GeV for baseline length 295 km towards world largest water Cerenkov detector, Super-Kamiokande. Its excellent resolution particle identification enable reconstruction initial...
Recent studies indicated that ischemic microvascular damage may be reversible or progressive after coronary reflow. Intramyocardial hemorrhage is a phenomenon reflects severe injury. We examined the relationship between temporal changes in perfusion patterns detected by myocardial contrast echocardiography (MCE) and intramyocardial magnetic resonance imaging (MRI) patients with acute infarction (AMI).The study population consisted of 24 anterior AMI. All underwent MCE shortly reflow chronic...
The chemical oxidative conversion of creatinine (Cr) into methylguanidine (MG) has been followed by 'H-NMR and HPLC. By using active oxygen species generated Fenton's reagent (Fe2+ H2O2) or the similar (Fe3+ H2O2), creatol (CTL), a metabolite newly isolated from urine uremic patients, creatones A B were experimentally detected in reaction mixture implicated as successive intermediates pathway CR to MG. An alternative oxidation Cr demethylcreatinine (glycocyamidine) was also observed....
A pair of novel fluorophores (N-diacetates crosslines and B), (3R,4S)-3,4-dihydroxy-5-[(1S or 1R,2S,3R)-1,2,3,4-tetrahydroxybutyl]-1,7-bis[6-(N-acetyl-L-norleucyl)]-1,2,3,4-tetrahydro-1,7-naphthyridinium chloride its epimer, were isolated from the Maillard reaction mixture α-N-acetyl-L-lysine D-glucose, their properties are similar to those in age- diabetes-related cross-linked proteins, a homologues derived n-pentylamine.
We revisit the diffuse supernova neutrino background in light of recent systematic studies stellar core collapse that reveal quantitative impacts progenitor conditions on process. In general, dependence core-collapse emission is not monotonic initial mass, but we show it can, at first order, be characterized by compactness. For time, incorporate detailed variations over entire mass range $8$-$100 {\rm M}_\odot$, based (i) a long-term simulation $8.8 M}_\odot$ O-Ne-Mg progenitor, (ii) 100...
Core-collapse supernovae (CCSNe) are the final stage of massive stars, marking birth neutron stars (NSs). The aspherical mass ejection drives a natal kick forming NS. In this work we study properties NS based on our long-term hydrodynamics CCSN simulations. We perform two-dimensional (2D) simulations for ten progenitors from 10.8 to 20 $\, M_{\odot}$ star covering wide range progenitor's compactness parameter, and two three-dimensional (3D) an 11.2 star. Our 2D models present variety...
Abstract The electron antineutrino flux limits are presented for the brightest gamma-ray burst (GRB) of all time, GRB221009A, over a range 1.8–200 MeV using Kamioka Liquid Scintillator Antineutrino Detector. Using multiple time windows ranging from minutes to days surrounding event search antineutrinos coincident with GRB, we set an upper limit on under assumption several power-law neutrino source spectra, indices 1.5 3 in steps 0.5. No excess was observed any seconds around trigger T 0 ....