A5064506040- Pulsars and Gravitational Waves Research
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Geophysics and Sensor Technology
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Mechanical and Optical Resonators
- Nuclear and radioactivity studies
- High-pressure geophysics and materials
- Astrophysical Phenomena and Observations
- Seismic Waves and Analysis
- Thermal Analysis in Power Transmission
- Radio Astronomy Observations and Technology
- Quantum Information and Cryptography
- Radioactive element chemistry and processing
- Astrophysics and Cosmic Phenomena
- Climate Change Policy and Economics
- Advanced Frequency and Time Standards
- Photonic and Optical Devices
- Nuclear reactor physics and engineering
- Advanced Fiber Laser Technologies
- Graphite, nuclear technology, radiation studies
- Renal Diseases and Glomerulopathies
Japan Aerospace Exploration Agency
2020-2024
Institute of Space and Astronautical Science
2020-2024
Muroran Institute of Technology
1996-2024
The University of Tokyo
1987-2023
California Institute of Technology
2023
Saiseikai Kumamoto Hospital
2017-2023
Kumamoto University
1997-2022
Kavli Institute for the Physics and Mathematics of the Universe
2016-2022
Sumitomo Electric Industries (United States)
2021
Luleå University of Technology
2017
Abstract KAGRA is a newly built gravitational-wave telescope, laser interferometer comprising arms with length of 3 km, located in Kamioka, Gifu, Japan. was constructed under the ground and it operated using cryogenic mirrors that help reducing seismic thermal noise. Both technologies are expected to provide directions for future telescopes. In 2019, finished all installations designed configuration, which we call baseline KAGRA. For this occasion, present an overview from various viewpoints...
Abstract The Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is a future Japanese space mission with frequency band of 0.1 Hz to 10 Hz. DECIGO aims at the detection primordial gravitational waves, which could have been produced during inflationary period right after birth Universe. There are many other scientific objectives DECIGO, including direct measurement acceleration expansion Universe, and reliable accurate predictions timing locations neutron star/black hole binary...
Experimental injury is useful to induce tissue stem cells, which may exist in small numbers under normal conditions. The salivary glands originate from the endoderm and consist of acinar ductal epithelial have exocrine function. After gland duct ligation, cells disappear as a result apoptosis, epithelium subsequently proliferates. In this study, we analyzed induced by ligation mice using immunohistochemistry flow cytometry. We sorted Sca-1 + /c-Kit fraction adult way fluorescence-activated...
Tissue damage can be assessed based on regenerative responses, including progenitor cell proliferation. In the salivary gland, tissue induced by ligation of main ducts leads to disappearance acinar cells and marked proliferation ductal cells. Reopening repopulation within 1 2 weeks, which suggests activation in a damaged state. Because submandibular glands derive from endoderm ectoderm, we investigated possibility presence endodermal We cultured obtained ligated gland identified colonies...
Axion dark matter differentiates the phase velocities of circular-polarized photons. In this Letter, a scheme to measure difference by using linear optical cavity is proposed. If applied Fabry-Pérot arm Advanced-LIGO-like (Cosmic-Explorer-Like) gravitational wave detector, potential sensitivity axion-photon coupling constant, g_{aγ}, reaches g_{aγ}≃8×10^{-13} GeV^{-1}(4×10^{-14} GeV^{-1}) at axion mass m≃3×10^{-13} eV (2×10^{-15} eV) and remains around for three orders magnitude in mass....
Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is the future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO aims at detection primordial gravitational waves, which could be produced during inflationary period right after birth universe. There are many other scientific objectives DECIGO, including direct measurement acceleration expansion universe, and reliable accurate predictions timing locations neutron star/black hole binary coalescences....
Gravitational waves have only two polarization modes in general relativity. However, there are six possible of a generic metric theory gravity. Thus, tests gravitational-wave can be tools for pursuing the nature space-time structure. The observations gravitational with worldwide network interferometric detectors such as Advanced LIGO, Virgo, and KAGRA will make it to obtain information from detector signals. We study separability inspiral compact binary coalescences systematically. Unlike...
Axions are one of the well-motivated candidates for dark matter, originally proposed to solve strong $CP$ problem in particle physics. Dark matter Axion search with riNg Cavity Experiment (DANCE) is a new experimental project broadly axion mass range ${10}^{\ensuremath{-}17}\text{ }\text{ }\mathrm{eV}<\phantom{\rule{0ex}{0ex}}{m}_{a}<{10}^{\ensuremath{-}11}\text{ }\mathrm{eV}$. We aim detect rotational oscillation linearly polarized light caused by axion-photon coupling bow-tie cavity. The...
We have proposed using laser interferometric gravitational wave detectors to search for ultralight vector and axion dark matter. Vector matter can be probed through oscillating forces on suspended mirrors, while detected via polarization rotation of beams. This paper reviews these searches with the KAGRA detector in Japan, including first KAGRA's 2020 data installation optics during upcoming 2025 observing run.
Graphics processing unit (GPU) accelerated performs significant efficiency in many multimedia applications. With the development of GPU cloud computing, more and providers focus on GPU-accelerated services. Since high maintenance cost different speedups for various applications, services still need a pricing strategy. Thus, this paper, we propose an optimal strategy maximizing profits both provider users. We first analyze revenues costs users when adopt then state profit functions game...
In patients with Wilson's disease, both copper incorporation into ceruloplasmin and excretion of this metal bile are impaired. These conditions caused by a genetic defect in the disease gene (ATP7B). To investigate protein (ATPase7B) hepatocytes, we constructed an expression plasmid carrying full-length complementary DNA for human attempted to express hepatocytes LEC rats, animal model disease. Transfection either vitro or vivo, was done using newly developed cationic liposome containing...
Axion is a promising candidate for ultralight dark matter which may cause polarization rotation of laser light. Recently, new idea probing the axion by optical linear cavities used in arms gravitational wave detectors has been proposed [Phys. Rev. Lett. 123, 111301 (2019). In this article, realistic scheme search with arm cavity transmission ports revisited. Since photons detected travel odd-number times, effect on their phases not canceled out and sensitivity at low-mass range significantly...
Ultralight bosonic particles are fascinating candidates of dark matter (DM). It behaves as classical waves in our Galaxy due to its large number density. There have been various methods proposed search for the wavelike DM, such utilizing interferometric gravitational-wave detectors. Understanding characteristics DM signals is crucial extract properties from data. While signal nearly monochromatic with angular frequency mass, amplitude and phase gradually changing velocity dispersion DMs...
We have developed a precise relative source location technique using acoustic emission doublets (AE doublets) in the triaxial hodogram method to evaluate direction and distance of subsurface extension cracks. An AE doublet is pair emissions with similar waveforms adjacent locations on same crack but which occur at different times. The estimated by an analysis frequency domain. between two sources determined from difference P-S arrival time delays cross‐spectrum analysis. derived spectral...
There exist six possible polarization modes of gravitational waves in a general metric theory gravity, while two tensor are allowed relativity. The properties and number depend on gravity theories. For transient signals, the detectors needs to be basically equal gravitational-wave for separation polarizations. However, single detector having great sensitivity at lower frequency could effectively regarded as virtual network including set along its trajectory due long signal from compact...
Abstract We have proposed a new approach to search for axion dark matter with an optical ring cavity [Phys. Rev. Lett. 121, 161301 (2018)]. The coupling of photons axions or axion-like particles makes modulated difference in the phase velocity between left- and righthanded photons. Our method is measure this cavity, by measuring resonant frequency two circular polarizations. estimation shows that sensitivity axion-photon constant g γ mass m ≲ 10 −10 eV can be improved several orders...
Upgrades to improve the sensitivity of gravitational wave detectors enable more frequent detections and precise source parameter estimation. Unlike other advanced interferometric such as Advanced LIGO Virgo, KAGRA requires a different approach for upgrade since it is only detector which employs cryogenic cooling test masses. In this paper, we describe possible upgrades with technologies focusing on bands compare impacts detection compact binary coalescences. We show that either fivefold...
DECIGO is the future Japanese gravitational wave detector in outer space. We previously set default design parameters to provide a good target sensitivity detect primordial waves (GWs). However, updated upper limit of GWs by Planck observations motivated us for further optimization sensitivity. Previously, we had not considered optical diffraction loss due very long cavity length. In this paper, optimize various maximizing signal-to-noise ratio (SNR), quantum noise including effects loss....
Cryogenic cooling of the test masses interferometric gravitational wave detectors is a promising way to reduce thermal noise. However, cryogenic limits incident power masses, which freedom shaping quantum also requires short and thick suspension fibers extract heat, could result in worsening Therefore, careful tuning multiple parameters necessary designing sensitivity detectors. Here, we propose use particle swarm optimization optimize these We apply it for KAGRA detector, show that binary...
KAGRA is a new gravitational wave detector which aims to begin joint observation with Advanced LIGO and Virgo from late 2019. Here, we present KAGRA's possible upgrade plans improve the sensitivity in decade ahead. Unlike other state-of-the-art detectors, requires different investigations for since it only employs cryogenic cooling of test mass mirrors. In this paper, on can be realized by changing input laser power, increasing mirror mass, injecting frequency dependent squeezed vacuum are...
To investigate the possibility of chronotherapy with antidepressants for patients depression, we gave single daily doses clomipramine 150 mg/day to 30 depression at three different times day, i.e., morning, noon, or before bedtime, using a double-blind method over 4-week period. Beneficial effects differed according administration time most effective result being found noon. Time-dependent differences in side were observed tremors and dryness mouth. An additional 10 administered their...
The DECi-hertz Interferometer Gravitational-Wave Observatory (DECIGO) is a space gravitational wave (GW) detector. DECIGO was originally designed to be sensitive enough observe primordial GW background (PGW). However, due the lowered upper limit of PGW by Planck observation, further improvement target sensitivity required. In previous studies, DECIGO’s parameters were optimized maximize signal-to-noise ratio (SNR) quantum noise including effect diffraction loss. To simulate SNR more...
We propose and demonstrate a method to, in principle, completely remove shot noise of optical beat-note detection using squeezed light. This leads to improving the sensitivity various spatial/temporal measurements.