M. Matsumura
A5072804809- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Rare-earth and actinide compounds
- Astro and Planetary Science
- Physics of Superconductivity and Magnetism
- Magnetic Properties of Alloys
- Iron-based superconductors research
- Wastewater Treatment and Nitrogen Removal
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Inorganic Chemistry and Materials
- Voice and Speech Disorders
- Speech Recognition and Synthesis
- Phonetics and Phonology Research
- Non-Invasive Vital Sign Monitoring
- Atmospheric Ozone and Climate
- Theoretical and Computational Physics
- Magnetic properties of thin films
- Astronomy and Astrophysical Research
- Speech and Audio Processing
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Dysphagia Assessment and Management
- Obstructive Sleep Apnea Research
- Solar and Space Plasma Dynamics
Kagawa University
2011-2024
Shikoku Cancer Center
2022
University of Tsukuba
1998-2021
Osaka Electro-Communication University
2008-2019
Kōchi University
2005-2015
University of Kochi
1997-2012
Institute of Applied Biochemistry
1993-2009
Takamatsu University
1995-2007
Fujitsu (Japan)
2006
Mitsubishi Electric (Japan)
1999-2002
We present the first results from B-fields In STar-forming Region Observations (BISTRO) survey, using Sub-millimetre Common-User Bolometer Array 2 (SCUBA-2) camera, with its associated polarimeter (POL-2), on James Clerk Maxwell Telescope (JCMT) in Hawaii. discuss survey's aims and objectives. describe rationale behind questions which survey will aim to answer. The most important of these is role magnetic fields star formation process scale individual filaments cores dense regions. data...
Abstract The dependence of the polarization fraction p on total intensity I in polarized submillimeter emission measurements is typically parameterized as ∝ − α ( ≤ 1) and used to infer dust grain alignment efficiency star-forming regions, with an index = 1 indicating near-total lack grains magnetic field. In this work, we demonstrate that non-Gaussian noise characteristics may produce apparent ∼ even data significant signal-to-noise Stokes Q , U emission, so robust angle. We present a...
Journal Article Crystal Structure of Bacillus stearothermophilus a-Amylase: Possible Factors Determining the Thermostability Get access Duvjir Suvd, Suvd *Institute Applied Biochemistry, University TsukubaTsukuba, Ibaraki 305-857†Department Biotechnology, National Institute Agrobiological ResourcesTsukuba, 305-8602 Search for other works by this author on: Oxford Academic PubMed Google Scholar Zui Fujimoto, Fujimoto †Department Kenji Takase, Takase Masatoshi Matsumura, Matsumura 305-857...
We present the results of dust emission polarization measurements Ophiuchus-B (Oph-B) carried out using Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera with its associated polarimeter (POL-2) on James Clerk Maxwell Telescope (JCMT) in Hawaii. This work is part B-fields In Star-forming Region Observations (BISTRO) survey initiated to understand role magnetic fields star formation for nearby star-forming molecular clouds. a first look at geometry and strength Oph-B. The field...
Abstract We present 850 μ m imaging polarimetry data of the ρ Oph-A core taken with Submillimeter Common-User Bolometer Array-2 (SCUBA-2) and its polarimeter (POL-2) as part our ongoing survey project, <?CDATA ${\boldsymbol{B}}$?> -fields In STar forming RegiOns (BISTRO). The polarization vectors are used to identify orientation magnetic field projected on plane sky at a resolution 0.01 pc. 10 subregions distinct fractions angles in 0.2 pc core; some them can be coherent structure Oph...
We present new observations of the active star-formation region NGC 1333 in Perseus molecular cloud complex from James Clerk Maxwell Telescope B-Fields In Star-forming Region Observations (BISTRO) survey with POL-2 instrument. The BISTRO data cover entire (~1.5 pc x 2 pc) at 0.02 resolution and spatially resolve polarized emission individual filamentary structures for first time. inferred magnetic field structure is as a whole, each filament aligned different position angles relative to...
We report 850~$\mu$m dust polarization observations of a low-mass ($\sim$12 $M_{\odot}$) starless core in the $\rho$ Ophiuchus cloud, C, made with POL-2 instrument on James Clerk Maxwell Telescope (JCMT) as part JCMT B-fields In STar-forming Region Observations (BISTRO) survey. detect an ordered magnetic field projected plane sky core. The across $\sim$0.1~pc shows predominant northeast-southwest orientation centering between $\sim$40$^\circ$ to $\sim$100$^\circ$, indicating that is well...
Here we study the MonR2 star forming region, which has a rich network of filaments joining in cluster hub, aiming at understanding hub structure and to examine mass fraction residing filaments, is key factor that influences massive formation. We conducted multi-scale, multi-component analysis Herschel column density maps (resolution 18.2" or $\sim$0.07 pc 830 pc) region using newly developed algorithm "getsf" identify structural components, namely, extended cloud, sources. find cascades...
Abstract We present 850 μ m polarimetric observations toward the Serpens Main molecular cloud obtained using POL-2 polarimeter on James Clerk Maxwell Telescope as part of B-fields In STar-forming Region Observations survey. These probe magnetic field morphology about 6000 au scales, which consists cores and six filaments with different physical properties such density star formation activity. Using histogram relative orientation (HRO) technique, we find that fields are parallel to in...
Abstract Measurement of magnetic field strengths in a molecular cloud is essential for determining the criticality support against gravitational collapse. In this paper, as part JCMT BISTRO survey, we suggest new application Davis–Chandrasekhar–Fermi (DCF) method to estimate distribution OMC-1 region. We use observations dust polarization emission at 450 and 850 μ m, C 18 O (3–2) spectral line data obtained with JCMT. volume density, velocity dispersion, angle dispersion box, 40″ × (5×5...
The high-energy synchrotron x-ray powder diffraction experiments of LaRu${}_{2}$Al${}_{10}$ were carried out to clarify the charge-density distribution, which is derived by maximum entropy method/Rietveld technique. results indicate that charge density between Ru and surrounding Al atoms large, but La small. We propose Ru-Al${}_{10}$ polyhedron fundamental component crystal two-dimensional layer constructed these polyhedra in $ac$ plane stacked along $b$ axis way Al5 atom. Ln ion located...
We have investigated the magnetic properties in well localized compound NdFe${}_{2}$Al${}_{10}$ and Kondo semiconductor Ce${T}_{2}$Al${}_{10}$ ($T=\text{Ru}$, Os) to clarify origin of unusual order Ce${T}_{2}$Al${}_{10}$. In NdFe${}_{2}$Al${}_{10}$, experimental results could be reproduced very by mean-field calculation for two-sublattice model. we reproduce anisotropic susceptibility paramagnetic region above 60--100 K model introducing an exchange interaction recently determined...
We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ hub-filament structure Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on James Clerk Maxwell Telescope (JCMT) as part BISTRO (B-fields in Star-forming Region Observations) survey. orientations magnetic field follow spiral Mon R2, which well-described by an axisymmetric model. estimate turbulent component using angle difference between our best-fit model underlying...
The application of ultrasonic irradiation to control cyanobacterial blooms was evaluated in actual eutrophic lake water. Ten prototype units the Ultrasonic Irradiation System (USIS) were installed 32 ha Lake Senba, and water sediment quality monitored for 2 years. By incorporating ultrasonication process with on-going strategy, particularly flushing induction water, can be controlled effectively. In addition, a significant improvement conditions terms chlorophyll-a, COD T-P attained....
We studied the applied magnetic field direction ($\ensuremath{\theta}$) dependence of and transport properties Ce$T$${}_{2}$Al${}_{10}$ ($T=$ Ru, Os) in $ab$, $bc$, $ca$ planes focusing on anisotropy ordered state. The magnetization NdOs${}_{2}$Al${}_{10}$ was also as a reference Ce$T$${}_{2}$Al${}_{10}$. results antiferromagnetic (AFM) state could be understood normal localized AFM compound. In Ce$T$${}_{2}$Al${}_{10}$, susceptibility exhibits smooth $\mathrm{cos}\ensuremath{\theta}$-like...
Summary Disuse atrophy of swallowing‐related organs due to an excessive decrease in swallowing frequency is suspected occur patients with poor oral intake, especially elderly people. However, daily life has not previously been examined the elderly. This study people and compared these findings those a younger population differences degree activity life. (i) We 20 (82·0 ± 8·3 year) 15 healthy young (26·5 3·5 year). (ii) were divided into two groups according life: semi‐bedridden group...
Abstract We present the 850 μ m polarization observations toward IC 5146 filamentary cloud taken using Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polarimeter (POL-2), mounted on James Clerk Maxwell Telescope, as part of B -fields In STar forming Regions Observations. This work is aimed at revealing magnetic field morphology within a core-scale (≲1.0 pc) hub-filament structure (HFS) located end parsec-scale filament. To investigate whether observed traces in HFS,...
Abstract We present observations of polarized dust emission at 850 μ m from the L43 molecular cloud, which sits in Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on James Clerk Maxwell Telescope as a part BISTRO large program. is dense ( <?CDATA ${N}_{{{\rm{H}}}_{2}}\sim {10}^{22}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>N</mml:mi> </mml:mrow> <mml:mi mathvariant="normal">H</mml:mi> <mml:mn>2</mml:mn>...
We performed the ${}^{27}$Al NMR on CeRu${}_{2}$Al${}_{10}$ single crystal, which exhibits unusual phase transition at ${T}_{0}=27$ K. Below ${T}_{0}$, lines split into two site-selectively depending magnetic-field direction. The spectrum shows different types of splitting below and above ${H}^{*}\ensuremath{\sim}4$ T for ${H}_{\mathrm{ext}}\ensuremath{\parallel}c$ where a metamagneticlike is observed. results measured resonance field ${H}_{0}\ensuremath{\sim}2.8$ were consistent with...
We performed the detailed studies of pressure effect on anisotropic electrical resistivity ($\ensuremath{\rho}$) CeRu${}_{2}$Al${}_{10}$ in order to clarify if is also or not. The results clearly showed large $\ensuremath{\rho}$. By applying pressure, peak $\ensuremath{\rho}$ along $c$ axis below antiferromagnetic transition temperature (${T}_{0}$) rapidly suppressed, and becomes small similar $a$ where already at ambient pressure. On other hand, that $b$ enhanced up 2 GPa. Also, dependence...
We investigated the magnetic properties of antiferromagnetic (AFM) compound Gd$T$${}_{2}$Al${}_{10}$ ($T=\text{Ru}$ and Fe). Although GdRu${}_{2}$Al${}_{10}$ could be understood well as a simple AFM compound, exchange interaction in GdFe${}_{2}$Al${}_{10}$ is found to greatly varied with temperature. The magnitude reduced decreasing ascribed its origin enhancement Fe ion decrease temperature was observed YFe${}_{2}$Al${}_{10}$. ordered moment along [011] direction $bc$ plane both compounds...
We present the POL-2 850 $\mu$m linear polarization map of Barnard 1 clump in Perseus molecular cloud complex from B-fields In STar-forming Region Observations (BISTRO) survey at James Clerk Maxwell Telescope. find a trend decreasing fraction as function total intensity, which we link to depolarization effects towards higher density regions cloud. then use data infer plane-of-sky orientation large-scale magnetic field 1. This runs North-South across most cloud, with exception B1-c where it...
Domestic wastewater is a significant source of nitrogen and phosphorus, which cause lake eutrophication. Among the treatment technologies, constructed wetlands are promising low-cost means treating point diffuse sources domestic in rural areas. However, sustainable operation wetland systems depends upon high rate conversion organic nitrogenous loading into their metabolic gaseous end products, such as N2O CH4. In this study, we examined compared performance three typical types wetlands: Free...