A5101486031- Advanced Thermodynamic Systems and Engines
- Ultrasound and Hyperthermia Applications
- Ultrasound and Cavitation Phenomena
- Refrigeration and Air Conditioning Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Bat Biology and Ecology Studies
- Acoustic Wave Resonator Technologies
- Heat Transfer and Boiling Studies
- Photoacoustic and Ultrasonic Imaging
- Advanced Thermodynamics and Statistical Mechanics
- Marine animal studies overview
- Spacecraft and Cryogenic Technologies
- Animal Vocal Communication and Behavior
- Ultrasonics and Acoustic Wave Propagation
- Thermal Radiation and Cooling Technologies
- Flow Measurement and Analysis
- Underwater Acoustics Research
- Microfluidic and Bio-sensing Technologies
- ZnO doping and properties
- Ferroelectric and Piezoelectric Materials
- Effects of Environmental Stressors on Livestock
- Cardiovascular Health and Disease Prevention
- Innovative Microfluidic and Catalytic Techniques Innovation
- Fluid Dynamics and Mixing
- Ultrasound Imaging and Elastography
Doshisha University
2014-2024
Tohoku University
2021-2022
National Institute of Advanced Industrial Science and Technology
2019
Akita Prefectural University
2018-2019
Kobe City College of Technology
2019
Akita University
2018
Eneos (Japan)
2017-2018
Agricultural Research Center
2008-2015
Chiba University
2013
NTL Institute for Applied Behavioral Science
2003-2011
The cleistogamous flower sheds its pollen before opening, forcing plants with this habit to be almost entirely autogamous. Cleistogamy also provides a means of escape from cereal head blight infection and minimizes pollen-mediated gene flow. lodicule in barley is atrophied. We have isolated cleistogamy 1 (Cly1) by positional cloning show that it encodes transcription factor containing two AP2 domains putative microRNA miR172 targeting site, which an ortholog Arabidopsis thaliana AP2....
An onboard microphone (Telemike) was developed to examine changes in the basic characteristics of echolocation sounds small frequency-modulated echolocating bats, Pipistrellus abramus. Using a dual high-speed video camera system, spatiotemporal observations were conducted on bats during landing flight task laboratory. The Telemike allowed us observe emitted pulses and returning echoes which flying listened flight, acoustic parameters could be precisely measured without traditional problems...
Pulse wave evaluation is an effective method for arteriosclerosis screening. In a previous study, we verified that pulse waveforms change markedly due to arterial stiffness. However, consists of two components, the incident and multireflected waves. Clarification complicated propagation these waves necessary gain understanding nature in vivo. this built one-dimensional theoretical model pressure propagating flexible tube. To evaluate applicability model, compared estimations with measured...
A method for designing frequencies and modes in ultrasonic transducers above the very-high-frequency (VHF) range is required non-destructive evaluation acoustic mass sensors. To obtain desired longitudinal shear wave conversion loss characteristics transducer, we propose use of a c-axis zig-zag structure consisting multilayered 23° tilted ZnO piezoelectric films. In this structure, every layer has same thickness, tilt directions odd even layers are symmetric with respect to film surface...
The direction of the secondary Bjerknes force between a free bubble and an attached was experimentally investigated. behavior two bubbles in ultrasonic standing wave 27 kHz observed using imaging system with high-speed video camera. It demonstrated that reversed at specific separation distance bubbles, which defined as threshold distance. changed radius bubble. In addition, theoretical calculation performed previously derived model coupled vibrations [Ida, Phys. Lett. A 297, 210–217 (2002)]....
The echolocation sounds of Japanese CF-FM bats (Rhinolophus ferrumequinum nippon) were measured while the pursued a moth (Goniocraspidum pryeri) in flight chamber. Using 31-channel microphone array system, we investigated how adjust pulse direction and beam width according to prey position. During search approach phases, horizontal vertical widths ±22±5 ±13±5 deg, respectively. When entered terminal phase approximately 1 m from moth, distinctive evasive by G. pryeri was sometimes observed....
In cancellous bone, longitudinal waves often separate into fast and slow depending on the alignment of bone trabeculae. This interesting phenomenon becomes an effective tool for diagnosis osteoporosis because wave propagation behavior depends structure. We have, therefore, simulated in such a complex medium by finite-difference time-domain (FDTD) method, using three-dimensional X-ray computer tomography (CT) model actual bone. this simulation, experimentally observed acoustic constants...
ZnO film, in which the crystallite c axis lies substrate plane [(112¯0) textured ZnO], is a good candidate for application shear mode piezoelectric devices. The relationships between degree of crystallites alignment and electromechanical coupling coefficient k15 (112¯0) films have been investigated. Forty pure-shear high overtone bulk acoustic resonators consisting film were prepared. was varied thickness. degrees determined by x-ray pole figure analysis. values estimated from conversion...
AbstractAbstractA low cadmium (Cd) concentration in wheat grain is desirable because of Cd toxicity to humans. Grain concentrations Japanese differed among the varieties previous study. In this study, we hypothesized that with a have (1) uptake from soil through roots during early growth and/or (2) translocation shoots, and also, (3) affected by root morphology. These hypotheses were verified investigating quantity root, shoot leaf tissues, examining morphology young seedlings high...
Flight paths of echolocating Japanese house bats, Pipistrellus abramus, were tracked during insect hunting in a natural setting using 32-microphone array. The array surrounded the foraging area, locating each bat, and determined directional aim sonar beam. Successive interceptions, indicated by feeding "buzzes" post-buzz pauses, occurred singly at intervals from over 20 s down to multiple interceptions 2–3 intervals. Bats flew on looping, curved paths. Turning radius tightened as rate...
Biosonar behavior was examined in Taiwanese leaf-nosed bats (Hipposideros terasensis; CF-FM bats) during flight. Echolocation sounds were recorded using a telemetry microphone mounted on the bat’s head. Flight speed and three-dimensional trajectory of bat reconstructed from images taken with dual high-speed video camera system. Bats observed to change intensity emission rate pulses depending distance landing site. Frequencies dominant second harmonic constant frequency component (CF2) calls...
The echolocation behavior of Pipistrellus abramus during exposure to artificial jamming sounds flight was investigated. Echolocation pulses emitted by the bats were recorded using a telemetry microphone mounted on bats' backs, and their adaptation based acoustic characteristics assessed in terms jamming-avoidance responses (JARs). In experiment 1, frequency-modulated (3 ms duration) mimicking P. prepared. All showed significant increases terminal frequency pulse an average 2.1–4.5 kHz when...
A phase adjuster (PA) is proposed to improve the cooling effect of a loop-tube-type thermoacoustic system. PA device for accelerating particle velocity. The embedded in loop tube and narrows cross-sectional area part tube. creates strong boundary condition which velocity accelerated. It confirmed that phases sound pressure are adjusted so generated resonated with total length at one-wavelength resonance. This results great improvement
Seven steroidal glycosides, tentatively named glycosides A, B(1), C(2), D(3), E(4), F(5) and G(6), were isolated from the methanol extract of subterranean part Ophiopogon planiscapus NAKAI (Liliaceae). The structures these established as so-called β-sitosterol-β-D-glucopyranoside, diosgenin 3-O-α-L-rhamnopyranoxyl (1→2)-β-D-glucopyranoside (=prosapogenin A dioscin) (1), 3-O-[α-L-rhamnopyranosyl(1→2)]-[β-D-glucopyranosyl-(1→4)]-β-D-glucopyranoside(=deltonin) (2),...
The use of a phase adjuster (PA) has been proposed to improve the cooling effect loop-tube-type thermoacoustic system. A PA is device for increasing particle velocity sound by narrowing part loop tube. In this experiment, we present discussion efficiency heat-to-sound energy conversion in prime mover, particularly emphasizing on inner diameter change PA. It found that pressure higher larger diameter; and difference between bigger diameter. also intensity different according diameter, it...
Thickness pure-shear mode film bulk acoustic wave resonators (PBARs) made of (112 macr0) textured ZnO films have been fabricated. We also fabricated FBAR structure consisting two layers the with opposite polarization directions. This operated in second overtone and allowed shear-mode FBARs at higher frequency. The effective electromechanical coupling coefficients k <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">eff</sub> <sup...
Using only a microphone array system, echolocation pulses and three-dimensional flight paths in the frequency-modulated bat, Pipistrellus abramus, during natural foraging, were simultaneously examined. During search phase, inter-pulse interval, pulse duration, moving distance of bat between successive emissions relatively constant at around 89.5 ± 18.7 ms, 6.90 1.31 0.50 0.20 m, respectively. The bats started to decrease these acoustical parameters within 2–3 m prey capture point. For every...
Pulse wave evaluation is an effective method for arteriosclerosis screening. The pulse comprises two displacement components, the incident ε(i)(t) and reflected ε(r)(t). Because amplitude of changes markedly with arterial stiffness, analysis this useful such stiffness. In paper, a noninvasive extracting component from proposed. First, + ε(r)(t) blood flow velocity u(i)(t) - u(r)(t) were measured at common carotid artery. A new approach used to estimate -ε(r)(t), in which transform...