Results 101 to 110 of about 252,409 (330)

Design and Modeling of a High‐Displacement, Skin‐Integrated Flexible Electromagnetic Actuator for Haptic Interfaces in Virtual Reality

Advanced Robotics Research, EarlyView.
A flexible, skin‐integrated electromagnetic actuator is developed for wearable virtual/augmented reality (VR/AR) haptic systems. A tunable design model enables control over displacement and resonance frequency. The system is validated through a custom VR application with a 6 × 4 actuator array, demonstrating real‐time, spatially targeted tactile ...
Naji Tarabay, Alexandra Zhang Jiang, Ziteng Liu, Rachel Villamor, Derek Cha, Ananya Renuka Balakrishna, Tianshu Liu, Priyanshu Agarwal, Rainer Dömer, Camilo Velez   +9 more
wiley   +1 more source

Characterization of the Normal Portal and Hepatic Blood Flow of Adult Holstein-Friesian Cows

Animals, 2019
In the past, hepatic blood flow in cows was invasively characterized to investigate different pathologies and physiological conditions. However, hepatic blood flow can be easily evaluated with transabdominal Doppler ultrasound.
J. Daniel Barreiro-Vázquez, Marta Miranda, M. Isabel Barreiro-Vilanova, F. Javier Diéguez, Andrés Barreiro-Lois   +4 more
doaj   +1 more source

Oscillations in Ionospheric Virtual Height, Echo Amplitude and Doppler Velocity: Theory and Observations.

Journal of geomagnetism and geoelectricity, 1993
Applying perturbation theory to the Appelton-Hartree formulas, a detailed derivation of ionospheric parameters for ionospherically reflected echoes shows that: 1) oscillations of Doppler velocity, virtual height and echo amplitude have the same power spectrum; 2) the temporal variations in Doppler velocity lead or lag those in phase height by 90° and 3)
J. Y. Liu, F. T. Berkey
openaire   +2 more sources

Sleep Alters the Velocity of Physiological Brain Pulsations in Humans

Advanced Science, EarlyView.
Sleep alters I/CSF oscillatory flow, driven by increased respiratory (29%) and vasomotor pulsation (21%) velocities, while cardiovascular pulsations decreased by (22%). Velocity is quantified using optical flow analysis of MREG data. Spectral power increases alongside these pulsations (spatial correlation, r = 0.35 and r = 0.39, respectively ...
Ahmed Elabasy, Heta Helakari, Tommi Väyrynen, Zalán Rajna, Niko Huotari, Lauri Raitamaa, Ville Isokoski, Matti Järvelä, Mika Kaakinen, Johanna Piispala, Mika Kallio, Vesa Korhonen, Tapio Seppänen, Vesa Kiviniemi   +13 more
wiley   +1 more source

Low Latitude Ionospheric TEC Oscillations Associated With Periodic Changes in IMF Bz Polarity

Geophysical Research Letters, 2019
An Ionospheric Observation Network for Irregularity and Scintillation in East/Southeast Asia was recently deployed. Using ionospheric total electron content (TEC) from the two crossed Beidou geostationary satellite receiver chains of the network along ...
Guozhu Li, Baiqi Ning, Xiukuan Zhao, Wenjie Sun, Lianhuan Hu, Haiyong Xie, Kangkang Liu, K. K. Ajith   +7 more
doaj   +1 more source

Investigation into the selection of viewing configurations for three-component planar Doppler velocimetry measurements. [PDF]

, 2007
A method for the calculation of three orthogonal velocity components in planar Doppler velocimetry (PDV) using four or more measured velocity components (to the three typically used) is presented.
Charrett, Thomas O. H., Nobes, David S., Tatam, Ralph P.   +2 more
core  

Absolute velocity measurements in sunspot umbrae

, 2018
In sunspot umbrae, convection is largely suppressed by the strong magnetic field. Previous measurements reported on negligible convective flows in umbral cores.
Doerr, H. -P., Holzwarth, R., Löhner-Böttcher, J., Schlichenmaier, R., Schmidt, W., Steinmetz, T.   +5 more
core   +1 more source

Amyloid β Instigates Cardiac Neurotrophic Signaling Impairment, Driving Alzheimer's Associated Heart Disease

Advanced Science, EarlyView.
This research identified cardiac amyloid pathology, neurotrophic factor depletion, and reduced myocardial nerve function in a transgenic model of cerebral amyloidosis (Tg2576), Aβ‐challenged cardiomyocytes, and in human AD heart tissue. These findings carry significant diagnostic and therapeutic implications, emphasizing the role of neuro‐signaling ...
Andrea Elia, Rebecca Parodi‐Rullan, Rafael Vazquez‐Torres, Ashley Carey, Huaqing Zhao, Sabzali Javadov, Silvia Fossati   +6 more
wiley   +1 more source

Hinode/EIS Observation of the Alfvénic Fluctuations in the Quiet Sun

The Astrophysical Journal
Alfvénic fluctuations in the corona are regularly observed in EUV imaging and infrared spectroscopic data. We report here on the Doppler velocity fluctuations within the data from the Extreme-Ultraviolet Imaging Spectrometer (EIS) on board Hinode.
Edris Tajfirouze, Richard Morton, Peter R. Young   +2 more
doaj   +1 more source

The inhomogeneous response across the solar disc of unresolved Doppler velocity observations

, 2008
4 pages, 4 figures, proceedings of GONG 2008/SOHO XXI ...
Broomhall, A. M., Chaplin, W. J., Elsworth, Y., New, R.   +3 more
openaire   +2 more sources