A5029725902- earthquake and tectonic studies
- High-pressure geophysics and materials
- Astronomical Observations and Instrumentation
- Geological and Geochemical Analysis
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Performance and Analysis
- Earthquake and Disaster Impact Studies
- Astrophysics and Cosmic Phenomena
- Earthquake and Tsunami Effects
- Synthesis and Reactivity of Heterocycles
- Animal Virus Infections Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Urinary Tract Infections Management
- Geophysics and Sensor Technology
- Geochemistry and Geologic Mapping
- Synthesis and Reactions of Organic Compounds
- Urinary Bladder and Prostate Research
- Food Allergy and Anaphylaxis Research
- Arctic and Russian Policy Studies
- Island Studies and Pacific Affairs
- International Maritime Law Issues
Kyoto University
2013-2024
Toyama City Hospital
2005
The University of Tokyo
2001
Keio University
2001
Kyorin University
2000
Massachusetts Institute of Technology
1999
Zenyaku Kogyo (Japan)
1997
Hokuriku University
1989
Nagoya University
1986
Furukawa Electric (United Kingdom)
1967
Indications of lower mantle discontinuities have been debated for decades, but still little is known about their properties, and origins are enigmatic. In our study broad-band recordings deep events examined the presence signals from lower-mantle with a novel technique. We deconvolve vertical component P-wave coda in period range around 10s by S waveform stack many deconvolved traces moveout time corrections. synthetic seismograms an earth model without discontinuities, strongest signal thus...
We investigate the magnitude of shear‐wave velocity and density jumps across 410‐km 660‐km discontinuities in Earth's mantle. estimate SS reflection PS conversion coefficients from ScS reverberations receiver‐side P‐S converted phases, respectively, using broadband seismograms recorded at stations western Japan. Fractional changes model parameters that satisfy our observations northwest Pacific are (Δ Vs , Δ ρ )=(8.5%, 5.4%) for discontinuity, (4.9%, 1.9%) discontinuity.
We investigate layering structure in the mantle beneath Japan using ScS reverberation waveforms of two recent large deep events northwest Pacific. estimate regional variation elastic and anelastic as well properties major velocity discontinuities by modeling broadband seismograms recorded at dense networks, J‐Array FREESIA. The 660‐km discontinuity is deepest region where stagnant subducting slab transition zone tomographically imaged, but subsidence ∼10 km, much smaller than previous...
The complete nucleotide sequence of the avian leukosis virus causing so-called fowl glioma has been previously determined. Primers were designed for detection glioma-causal (FGV) based on 3′ untranslated region viral genome. provirus and RNA FGV specifically detected in various organs tissues, including feather pulp, from experimentally infected birds using nested polymerase chain reaction (PCR) reverse transcription PCR. prevalence was evaluated 131 Japanese fowls a zoological garden Japan...
Reports on the sky being brightly illuminated before, during, or after large earthquakes have existed for many centuries. Physical processes behind this phenomena, however, has not been fully explained despite public interest in phenomena. In report, we present photographic evidence that visible light is emitted from faults. We observe luminescence occurs simultaneously with brittle faulting, and spatial distribution of coincides faulting pattern. This consists several colors recordable...
To compare the ratio of free prostate specific antigen (fPSA), total PSA (tPSA) and complexed (cPSA, measured using a novel immunoassay) with other variables used to detect cancer in patients intermediate serum levels 4.1-10.0 ng/mL.From July 1997 August 1998, 140 consecutive were assessed; all had and/or abnormal findings on digital rectal examination. All underwent transrectal ultrasonography (TRUS)-guided biopsy, transition zone volumes determined by TRUS. Free tPSA Tandem-R assay...
Triamino-substituted 1,3,5-triazine derivatives were synthesized and tested for inhibitory activities against the aromatase of human placental microsomes cytochrome P450 side chain cleavage cholesterol (P450SCC) pig adrenal mitochondria. The compounds having imidazolyl tertiary amino groups as substituents in ring showed significant aromatase-inhibitory activity. Among them, 17, 23, 26, 27 28 more active than reference compound, CGS 16949A. these P450SCC much weaker their activities. These...
Research Article| April 10, 2019 On the Apparently Inappropriate Use of Multiple Hypothesis Testing in Earthquake Prediction Studies Mamoru Kato aEarth Science Group, Graduate School Human and Environmental Studies, Kyoto University, Yoshida‐Nihonmatsu, Sakyo, 606‐8501, Japan, mkato@gaia.h.kyoto-u.ac.jp Search for other works by this author on: GSW Google Scholar Author Article Information Publisher: Seismological Society America First Online: 10 Apr Online Issn: 1938-2057 Print 0895-0695 ©...
We investigate lateral variation of the upper mantle P-wave velocity structure in western Pacific rim using travel times P phases from regional shallow events. Onsets direct and later arrivals are manually picked up short-period waveforms at Matsushiro Seismic Array System central Japan by consulting correlation among seven array stations. For path along Kurile Alaska seismic zones, observed first events (d = 5–50 km) well explained a standard time table for Japan. Observations provide no...
We analyzed digital waveform data recorded at J-Array, a large-aperture short-period seismic array in Japan, order to search for P-waves reflected and/or refracted velocity discontinuity possibly existing the top of D" layer. During period April 1991-June 1992, we selected with good quality 8 events; 3 events California-Nevada, and 5 Fiji-Tonga-New Zealand. They are located distances 70 ti 85° from where phases originating layer expected. However, display no clear later arrivals...
AlBr3, N2, H2及びArからなる反応混合ガスを用いるプラズマCVDにより, 黒鉛基板上に均一な密着性のよい窒化アルミニウム (AlN) 膜がコーティングされた. AlN被覆黒鉛試料 (15×10×1mm) の耐酸化性試験を空気中 (相対湿度: 約50%) で, 室温-1200℃の温度範囲で行った. 熱重量分析の結果, 試料の耐酸化性はAlN膜の配向性と膜厚に依存することが分かった. c軸配向性の高いAlN厚膜 (膜厚>15μm) で均一にコーティングを行うと, 1200℃においても黒鉛基板の酸化は認められなかった.1050°-1200℃の高温では, これらの配向性AlN膜は, 放物線則に従う酸化挙動を示し, 表面のα-Al2O3層はAlN膜の酸化に対して不働態膜として働くことが確認された. しかし, 低配向性のAlN膜は, 1200℃で酸化時間とともにほぼ直線的に酸化され, 黒鉛の耐酸化性膜としては適さない.
Grid representation of 3‐D media and linear interpolation functions have been widely used in recent seismic traveltime tomographic studies. Either velocity or slowness is as a model parameter such studies, which are by definition mutually reciprocal. Field representations grid‐based models are, however, inconsistent when respectively used, do not hold the reciprocal relationship between fields. As consequence these two field lead to results from one set data, difference systematic cannot be...
Abstract Frequency distribution of the maximum amplitude seismograms at a station exhibits power‐law relation, which is Ishimoto–Iida law (II law). We investigate whether II applicable to modern strong‐motion seismograms. Distribution amplitudes records stations The Committee Earthquake Observation and Research in Kansai Area (CEORKA) network, western Japan, properties power or law. observation matches well with prediction, based on existing ground‐motion prediction equations for Japan....