A5040014010- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- EFL/ESL Teaching and Learning
- Seismic Performance and Analysis
- Second Language Acquisition and Learning
- Seismic Imaging and Inversion Techniques
- Coleoptera Taxonomy and Distribution
- Second Language Learning and Teaching
- Earthquake and Tsunami Effects
- Intergenerational Family Dynamics and Caregiving
- Earthquake Detection and Analysis
- High Temperature Alloys and Creep
- High-pressure geophysics and materials
- Neural dynamics and brain function
- Visual perception and processing mechanisms
- Migration, Aging, and Tourism Studies
- Urban and spatial planning
- Retinal Development and Disorders
- Metallurgy and Material Forming
- Structural Health Monitoring Techniques
- Global Health Care Issues
- Landslides and related hazards
- Gender, Labor, and Family Dynamics
- Geological and Geochemical Analysis
National Research Institute for Earth Science and Disaster Resilience
2015-2025
Miyagi University of Education
2012-2023
National Center of Neurology and Psychiatry
2012-2022
Meiji University
2014-2021
Tohoku University
2008-2020
Hosei University
2006-2020
IBM Research - Tokyo
2020
RIKEN
2009-2019
RIKEN Center for Advanced Intelligence Project
2019
RIKEN Center for Brain Science
2000-2018
Choosing an action that leads to a desired goal requires understanding of the linkages between actions and their outcomes. We investigated neural mechanisms such goal-based selection. trained monkeys on task in which relation visual cues, types, reward conditions changed regularly, selected based anticipated conditions. A significant number neurons medial prefrontal cortex were activated, after cue presentation before motor execution, only by particular action-reward combinations. This...
In this article we explore the process and product of languaging as it concerns learning grammatical concept voice (active, passive, middle) in French. We examine analyze amount type produced by a small sample university students they struggle to understand voice. Students who are high languagers learn about French with greater depth understanding than low languagers. demonstrate that there is relationship between quality quantity performance measured immediate delayed posttest stages. These...
The study compared the effects of two types form‐focused written feedback—direct corrective feedback (DCF) and metalinguistic explanation (ME) given to whole class—on Japanese university students’ accuracy use grammatical structures: indefinite article hypothetical conditional. Both were with without an opportunity rewrite. Accuracy was measured in new pieces writing. led increased for conditional but not article. effectiveness DCF proved longer lasting than ME. Also, providing revision...
[1] We investigate the rupture process of M9.0 Tohoku-Oki mega-thrust earthquake using relatively low-frequency strong-motion records (0.01–0.125 Hz) observed at 36 K-NET and KiK-net stations, epicentral distances which range from 120 km to 400 km. The fault model is a rectangular plane, length width are 510 along Japan Trench 210 subducting direction Pacific Plate, respectively. We perform multi-time-window inversion analysis with 30 × km2 subfault. derived slip has one large area. This...
The detailed source rupture process of the M 7.3 event (April 16, 2016, 01:25, JST) 2016 Kumamoto, Japan, earthquakes was derived from strong-motion waveforms using multiple-time-window linear waveform inversion. Based on observations surface ruptures, spatial distribution aftershocks, and geodetic data, a realistic curved fault model developed for source-process analysis this event. seismic moment maximum slip were estimated as 5.5 × 1019 Nm (M w 7.1) 3.8 m, respectively. had two...
We examined the connections between anterior inferotemporal cortex and superior temporal sulcus (STS) in macaque monkey by injecting Phaseolus vulgaris leucoagglutinin (PHA-L) or wheat germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) into dorsoanterior ventroanterior subdivisions of TE (TEad TEav, respectively) observing labeled terminals cell bodies STS. found a clear dichotomy rostral part STS: injections TEad resulted dense distribution upper bank STS, whereas labeling was...
In this study we compared the effects of two types form-focused instruction (FFI) on second language (L2) learning and their potential contributions to development different L2 knowledge. Both were pre-emptive in nature, that is planned teacher generated. Integrated FFI attention form was embedded within communicative practice; Isolated it separated from practice. Two groups adult learners English as a (ESL) received 12 hours or ‘passive’ construction. Learners’ progress written grammar test...
It has been argued that languaging plays a crucial role in learning second language (L2). The effects of languaging, especially oral (e.g., collaborative dialogue, private speech), have tested on the L2 knowledge domains. This study explored written by asking 24 Japanese learners English to write out their own explanations corrections they received draft had written. type grammar based vs. lexis based) were then assessed inspecting success immediate subsequent text revisions. Two major...
Abstract The use of strongly biased data generally leads to large distortions in a trained machine learning model. We face this problem when constructing predictor for earthquake-generated ground-motion intensity with learning. constructed study has an underestimation strong motions, although the fit on relatively weak ground motions is good. This caused by bias available records; there are few records dataset. Therefore, we propose hybrid approach and conventional prediction equation....
Limonius sapphirus sp. n. and L. onyx are described from Taiwan, representing the first record of genus in Taiwan. We provide an updated key to genera subtribe Athouina Taiwan general morphological information eximius Lewis, 1894 ignicollis 1894, which endemic Japan, for comparison with two Taiwanese species. believe that species closely allied, sharing characteristics lateral carina prothorax, prosternal spine aedeagus.
Abstract We derive the rupture process of 2008 Iwate–Miyagi Nairiku, Japan, earthquake ( M JMA 7.2), during which largest ground acceleration to date, namely, 4022 cm/sec 2 , was recorded at a hanging-wall station, IWTH25 station KiK-net, just above hypocenter. Velocity waveform data (0.1–1 Hz) 14 strong-motion stations K-NET and including borehole records IWTH25, are inverted using multi-time-window linear inversion method. assume horizontally layered velocity structure model having...
We developed a real-time tsunami forecast method using only pressure data collected from the bottom of ocean via dense offshore observation network. The key feature is rapid matching between observations and pre-calculated spatial distributions. first calculate waveforms at stations maximum coastal heights any possible source model register them in proposed Tsunami Scenario Bank (TSB). When occurs, we use multiple indices to quickly select dozens appropriate scenarios that can explain...
Abstract Ocean-bottom pressure gauges of wide and dense ocean-bottom observation networks around Japan, S-net DONET, observed ocean waves caused by the Tonga eruption that started at approximately 13:00 JST (UTC + 0900) on January 15, 2022. We scrutinized waveform records arriving to evaluate their nature found two significant disturbances between 20:00 21:00 after 22:00. The first disturbance with a positive-polarity pulse dominated long-period components (1000–3000 s) arrived DONET...
Mirror neurons respond when executing a motor act and observing others' similar act. So far, mirror have been found only in macaques, humans songbirds. To investigate the degree of phylogenetic specialization during course their evolution, we determined whether with properties to macaques occur New World monkey, common marmoset (Callithrix jacchus). The ventral premotor cortex (PMv), where reported is difficult identify marmosets, since no sulcal landmarks exist frontal cortex. We addressed...
Research Article| April 16, 2019 Ground‐Motion Characteristics and Nonlinear Soil Response Observed by DONET1 Seafloor Observation Network during the 2016 Southeast Off‐Mie, Japan, Earthquake Hisahiko Kubo; Kubo Corresponding Author aNational Institute for Earth Science Disaster Resilience, 3‐1, Tennodai, Tsukuba, Ibaraki 305‐0006, hkubo@bosai.go.jp Search other works this author on: GSW Google Scholar Takeshi Nakamura; Nakamura Wataru Suzuki; Suzuki Yadab P. Dhakal; Dhakal Kimura; Kimura...
Abstract A new dense and widely distributed tsunami observation network installed off northeast Japan detected millimeter‐scale tsunamis from an Mw 6.0 shallow interplate earthquake on 20 August 2016. Based the fault model deduced this data set, we obtained a stress drop of 1.5 MPa for event, similar to those associated with typical earthquakes. The rupture area was unlikely overlap regions where slow earthquakes occur, such as low‐frequency‐tremors very‐low‐frequency‐earthquakes. results...
ABSTRACT A large-scale permanent ocean-bottom seismograph network, named S-net, has been established in the Japan Trench area and consists of 150 observatories equipped with seismometers tsunamimeters. Most stations at water depths <1500 m were buried to a depth about 1 while they sited freely on seafloors greater depths. To understand characteristics strong ground motions offshore area, we compared horizontal vector peak accelerations (PGA), velocities (PGVs), acceleration response...
Hic-5 is a focal adhesion protein belonging to the paxillin LIM family that shuttles in and out of nucleus. In present study, we examined expression among mouse tissues by immunohistochemistry found its only smooth-muscle cells several tissues. This result consistent with previous report on adult human contradicts relatively ubiquitous paxillin, most homologous Hic-5. One factor characterizing vivo continuous exposure mechanical stretching organs. To study involvement cellular responses...
We analyzed S-wave horizontal-to-vertical (S-H/V) spectral ratios at six ocean bottom seismograph (OBS) sites of K-NET located in the Sagami Bay area Japan for nonlinear site responses. The degree nonlinearity was computed by comparing S-H/V strong motions (PGA ≥ 20 cm/s2) with those weak < cm/s2). Our analyses, which showed that weak-motion differ from to site, indicate underlying geology is not uniform OBS sites. It found threshold PGA causing a response generally different site....
The source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) was estimated from strong motion waveforms using a multiple-time-window kinematic waveform inversion. A large slip region with maximum 0.6 m extends hypocenter to shallower part, caused by first propagating upward 0–3 s after initiation. contribution this seismic waves in frequency band inversion is significant at all stations. Another smaller slips found north-northwest hypocenter, second direction 3–5 s....