Results 271 to 280 of about 1,492,115 (344)
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Mechanics of Advanced Materials and Structures, 2023
Seismic metamaterials (SMs) have potential applications in the protection of buildings from earthquake hazards, while research on the attenuation of low-frequency seismic waves is still limited.
Weiwei Wang +3 more
semanticscholar +1 more source
Seismic metamaterials (SMs) have potential applications in the protection of buildings from earthquake hazards, while research on the attenuation of low-frequency seismic waves is still limited.
Weiwei Wang +3 more
semanticscholar +1 more source
ACS Nano, 2021
The increasing population of the elderly and motion-impaired people brings a huge challenge to our social system. However, the walking stick as their essential tool has rarely been investigated into its potential capabilities beyond basic physical ...
Xinge Guo +8 more
semanticscholar +1 more source
The increasing population of the elderly and motion-impaired people brings a huge challenge to our social system. However, the walking stick as their essential tool has rarely been investigated into its potential capabilities beyond basic physical ...
Xinge Guo +8 more
semanticscholar +1 more source
International Journal of Electrical Power & Energy Systems, 2022
Hydropower is probably the largest sustainable energy source in use and plays an important role in maintaining power and frequency stability of the power system.
Dong Liu, Chaoshun Li, O. Malik
semanticscholar +1 more source
Hydropower is probably the largest sustainable energy source in use and plays an important role in maintaining power and frequency stability of the power system.
Dong Liu, Chaoshun Li, O. Malik
semanticscholar +1 more source
Underwater ultra-low frequency seismic source
The Journal of the Acoustical Society of America, 2021The ultra-low frequency band (2–8 Hz) is of interest for geophysical research due to advances in the field of full waveform inversion and elastic impedance measurements. Generating sound in the ultra-low frequency range is a difficult task. A powerful source with an ultra-low frequency should be able to displace hundreds of liters of water per cycle ...
openaire +2 more sources
Ultra-low-noise regenerative frequency divider
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2012We designed ultra-low-noise regenerative divide-by- 2 circuits that operate at input frequencies of 10, 20, and 40 MHz. We achieved output-referred single-sideband residual phase noise equal to -164 dBc/Hz at 10 Hz offset and estimated residual Allan deviation, σ(y)(τ) less than 3 × 10(-15)τ(-1) for a single divider, which is, to our knowledge, the ...
Archita, Hati +5 more
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Journal of Cosmology and Astroparticle Physics, 2022
Ultra-low-frequency gravitational waves (GWs) generated by individual inspiraling supermassive black hole binaries (SMBHBs) at the centers of galaxies may be detected by pulsar timing arrays (PTAs) in the future.
Ling-Feng Wang +4 more
semanticscholar +1 more source
Ultra-low-frequency gravitational waves (GWs) generated by individual inspiraling supermassive black hole binaries (SMBHBs) at the centers of galaxies may be detected by pulsar timing arrays (PTAs) in the future.
Ling-Feng Wang +4 more
semanticscholar +1 more source
A simple, calibrated, ultra-low frequency ballistocardiograph
Medical & Biological Engineering, 1966The physical basis of ballistocardiography has now been thoroughly investigated and there is general agreement that the ultra-low frequency system is the most satisfactory. The physiological basis of ballistocardiography and its clinical application require further study.
C K, Battye +4 more
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Dielectric Relaxation at Ultra Low Frequency
Ferroelectrics, 2003The isothermal charging and discharging currents were recorded for polyamide 11, polyethylene terephthalate and low density polyethylene in a large range of temperatures below and above the glass-rubber transition temperature of the amorphous phase, for different electrical fields and different charging and discharging times.
E. R. Neagu +2 more
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Ultra-low-frequency gravitational waves from cosmological and astrophysical processes
Nature Astronomy, 2021Gravitational waves at ultra-low frequencies (≲100 nHz) are key to understanding the assembly and evolution of astrophysical black hole binaries with masses ~106–109 M⊙ at low redshifts1–3. These gravitational waves also offer a unique window into a wide
C. Moore, A. Vecchio
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Science Translational Medicine, 2021
Nerve conduction and chronic pain are safely inhibited by an ultra low frequency current waveform. Aiming Ultra low Neuromodulation has been shown to reduce pain perception in patients with chronic pain; however, the existing technologies have limited ...
Martyn G. Jones +7 more
semanticscholar +1 more source
Nerve conduction and chronic pain are safely inhibited by an ultra low frequency current waveform. Aiming Ultra low Neuromodulation has been shown to reduce pain perception in patients with chronic pain; however, the existing technologies have limited ...
Martyn G. Jones +7 more
semanticscholar +1 more source