A5019902418- Muscle activation and electromyography studies
- EEG and Brain-Computer Interfaces
- Neuroscience and Neural Engineering
- Stellar, planetary, and galactic studies
- Solar and Space Plasma Dynamics
- Motor Control and Adaptation
- Non-Invasive Vital Sign Monitoring
- Heart Rate Variability and Autonomic Control
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Balance, Gait, and Falls Prevention
- Geotechnical Engineering and Soil Stabilization
- Advanced Sensor and Energy Harvesting Materials
- Tactile and Sensory Interactions
- Blind Source Separation Techniques
- Geomagnetism and Paleomagnetism Studies
- Optical Imaging and Spectroscopy Techniques
- Speech and Audio Processing
- Sports Performance and Training
- Adaptive optics and wavefront sensing
- Geotechnical Engineering and Analysis
- Infrared Thermography in Medicine
- Advanced X-ray Imaging Techniques
- Prosthetics and Rehabilitation Robotics
- Effects of Vibration on Health
Kobe City Nishi-Kobe Medical Center
2024
National Astronomical Observatory of Japan
1998-2022
The Graduate University for Advanced Studies, SOKENDAI
2018-2022
Osaka Electro-Communication University
2011-2021
Saitama Medical University
2021
Iwatani Naoji Foundation
2019
High Energy Accelerator Research Organization
2013-2017
University of Electro-Communications
2011-2013
Kyoto Prefectural University of Medicine
2013
University Hospital Kyoto Prefectural University of Medicine
2013
Photoplethysmography (PPG) technology has been used to develop small, wearable, pulse rate sensors. These devices, consisting of infrared light-emitting diodes (LEDs) and photodetectors, offer a simple, reliable, low-cost means monitoring the noninvasively. Recent advances in optical have facilitated use high-intensity green LEDs for PPG, increasing adoption this measurement technique. In review, we briefly present history PPG recent developments wearable sensors with LEDs. The application...
A novel space experiment achieves an unprecedented map of solar magnetic fields from the photosphere to base corona.
To make clear the control mechanism of force generation in human muscle, electrical activity brachialis muscle was studied at various levels contraction by recording single motor unit discharges as well mass electromyograms (EMGs).The firing rate units increased with along an S-shaped curve. At low force, their rates steeply force. intermediate each its linearly lower rates. As maximum approached, very steeply, reaching high 50 Hz or more.By applying a new method statistical processing to...
Root mean square (RMS) of trunk acceleration is seen frequently in gait analysis research. However, many studies have reported that the RMS value was related to walking speed. Therefore, relationship between and speed should be considered when used assess abnormality. We hypothesized values three sensing axes exhibit common proportions for healthy people if they walk at their own preferred abnormal deviate from proportions. In this study, we proposed ratio (RMSR) as a abnormality measure...
In this paper, we present an unobtrusive cuffless blood pressure (BP) monitoring system based on pulse arrival time (PAT) for facilitating long-term home BP monitoring. The proposed consists of electrocardiograph (ECG), a photoplethysmograph (PPG), and control circuit with Bluetooth module, all which are mounted common armchair to measure ECG PPG signals from users while sitting the in order calculate continuous PAT. Considering good linear correlation systolic (SBP) nonlinear diastolic...
Abstract The CLASP2 (Chromospheric LAyer Spectro-Polarimeter 2) sounding rocket mission was launched on 2019 April 11. measured the four Stokes parameters of Mg ii h and k spectral region around 2800 Å along a 200″ slit at three locations solar disk, achieving first spatially spectrally resolved observations polarization in this near-ultraviolet region. focus work presented here is center-to-limb variation linear across these resonance lines, which produced by scattering anisotropic...
We examined whether we could identify activity patterns of elderly people in a nursing home from sensor outputs an infrared monitoring system. The subjects consisted three people. A single passive installed on the ceiling each subject's usual dwelling room provided digital output whenever subject moved. subjects' actual daily activities were established questionnaires with which patients documented their living for 7 days. Activities classed as sleeping, getting up/breakfast, indoor...
The sounding rocket Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) was launched on September 3rd, 2015, and successfully detected (with a polarization accuracy of 0.1 %) the linear signals (Stokes Q U) that scattering processes were predicted to produce in hydrogen Lyman-alpha line (Lyα; 121.567 nm). Via Hanle effect, this unique data set may provide novel information about magnetic structure energetics upper solar chromosphere. CLASP instrument safely recovered without any damage we...
Abstract Following the coronavirus disease 2019 (COVID‐19) outbreak in February 2020, incidences of various infectious diseases decreased notably Hokkaido Prefecture, Japan. However, Japan began gradually easing COVID‐19 infection control measures 2022. Here, we conducted a survey children hospitalized with human metapneumovirus (hMPV), influenza A and B, respiratory syncytial virus infections 18 hospitals across Japan, spanning from July to June 2023. From March 2020 2022 (28 months), only...
We performed a quantitative analysis of the fall-risk assessment test using wearable inertia sensor focusing on two tests: time up and go (TUG) four square step (FSST). These tests consist various daily activities, such as sitting, standing, walking, stepping, turning. The TUG was by subjects at low high fall risk, while FSST healthy elderly hemiplegic patients with risk. In general, total performance activities evaluated. Clinically, it is important to evaluate each activity for further...
Magnetic and inertial sensors are becoming increasingly popular to measure three-dimensional (3D) orientation, because they well suited the ambulatory monitoring of posture movements subjects. This paper presents a complete implementation measurement estimation 3D orientation based on magnetic unit (MIMU) that we developed. The was combination accelerometer, gyroscope, magnetometer. A Kalman filter-based sensor fusion algorithm proposed implement measurements estimates. accuracy estimation,...
A novel myoelectric hand prosthesis consisting of electromyogram (EMG) signal processing units, a microprocessor-based dc motor servo system, and 1 degree-of-freedom (DOF) end effector has been developed. The flexion angle compliance the finger this can be voluntarily controlled with EMG signals. biomimetic controller for incorporated model neuromuscular control system constructed from an analysis force response to length perturbation flexor pollicis longus muscle, signals, configuration...
We tested a new model that involves monitoring physiological parameters and the use of rehabilitation training system to improve team-based healthcare. The consisted unobtrusive monitoring, highly efficient database, interventions by health professionals. This report discusses core technologies, especially those involved in which have been developed. blood pressure (BP) estimation system, electrocardiogram (ECG), Kinect-based web-based care including its were designed separately. BP was...
We have determined the isotopic abundance ratio of 7Li/6Li in interstellar media (ISMs) along lines sight to HD169454 and HD250290 using High-Dispersion Spectrograph on Subaru Telescope. also observed ζ Oph for comparison with previous data. The ratios were = 8.1+3.6−1.8 6.3+3.0−1.7 HD250290, respectively. These values are reasonable agreement those previously solar neighborhood ISMs within ±2σ error bars consistent our measurement 7.1+2.9−1.6 a cloud line Oph. This is good evidence...
Recently, design of Flip Chip (FC) Package is changing with the higher density Package. Conventional process Capillary Underfill (CUF) not applicable to PKGs such as 3D and chip stacked types. To solve these problems, other processes are being developed in which an encapsulant applied on a substrate before bonding IC. One those Non Conductive Film (NCF). In this process, after NCF applied, IC bonded. Interconnection cure done at same time. Therefore, has great influences FC assembly terms...
Abstract The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) sounding rocket experiment, launched in 2015 September, observed the hydrogen Ly α line (121.6 nm) an unprecedented high temporal cadence of 0.3 s. CLASP performed sit-and-stare observations quiet Sun near limb for 5 minutes with a slit perpendicular to and successfully captured off-limb spicule evolving along slit. is well suited investigating how spicules affect corona because it sensitive higher temperatures than other...
Chromospheric LAyer Spectro-Polarimeter (CLASP2) was a sounding rocket experiment, which is follow-up mission to the Lyman-Alpha (CLASP1) in 2015. To measure magnetic fields upper solar atmosphere highly quantitative manner, CLASP2 changes target wavelengths from hydrogen Ly-α line (121.567 nm) Mg II lines near 280 nm. We reused main structure and most of optical components CLASP1 instrument, reduced turnaround time cost. added magnifying system maintain wavelength resolution, even at longer...