Results 51 to 60 of about 56,536 (266)

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Observations of acoustic emission activity during gear defect diagnosis. [PDF]

, 2003
It is widely recognised that acoustic emission (AE) is gaining ground as a non- destructive technique (NDT) for health diagnosis on rotating machinery.
Mba, David, Tim Toutountzakis, David Mba, Toutountzakis, Tim   +3 more
core   +1 more source

Thermal Effects of Acoustic-gravity Waves in Titan’s Upper Atmosphere and Their Implications for Atmospheric Jeans Escape

The Astrophysical Journal
Early observations from the Cassini spacecraft revealed the presence of acoustic-gravity waves in Titan’s upper atmosphere. However, the impacts of wave modes with different temporal and spatial scales on the thermal structure and atmospheric escape have
Xing Wang, Jun Cui, Zhaoguo He, Hao Gu, Siqi Yi, Xiaoshu Wu   +5 more
doaj   +1 more source

Tracking tsunami propagation and Island’s collapse after the Hunga Tonga Hunga Ha’apai 2022 volcanic eruption from multi-space observations

Scientific Reports, 2023
The quantity and accuracy of satellite-geodetic measurements have increased over time, revolutionizing the monitoring of tectonic processes. Global Navigation Satellite System (GNSS) and satellite radar signals provide observations beyond ground ...
Mahesh N. Shrivastava, A. S. Sunil, Ajeet K. Maurya, Felipe Aguilera, Simón Orrego, P. S. Sunil, Rodrigo Cienfuegos, Marcos Moreno   +7 more
doaj   +1 more source

Variational Principles for Acoustic-Gravity Waves

The Physics of Fluids, 1963
Variational principles are developed for the dynamics of a fluid under initial stress in an arbitrary potential field and disturbed from equilibrium. They are formulated in terms of the fluid displacement. Two distinct principles are obtained which are mathematically equivalent but differ fundamentally from the physical viewpoint.
openaire   +2 more sources

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Frequency dependence of acoustic waves in marine sediments [PDF]

, 2002
In situ techniques provide the most reliable method of examining the geoacoustical properties of marine sediments. In the past, individual in situ surveys have only been able to examine compressional waves over a maximum frequency range of 100 Hz to 50 ...
Robb, G., Dix, J.K., Best, A.I., Leighton, T.G., Riggs, J.S., Harris, A., Bull, J.M., White, P.R.   +7 more
core  

Horizon effects with surface waves on moving water

, 2010
Copyright © 2010 IOP PublishingSurface waves on a stationary flow of water are considered, in a linear model that includes the surface tension of the fluid. The resulting gravity-capillary waves experience a rich array of horizon effects when propagating
Coullet, P., Philbin, Thomas G., Thomas G Philbin, Philbin, Thomas Gerard, Rousseaux, Germain, Maissa, P., Philippe Maïssa, Germain Rousseaux, Christian Mathis, Pierre Coullet, Leonhardt, Ulf, Maissa, Philippe, Ulf Leonhardt, Rousseau, G., Coullet, Pierre, Mathis, Christian   +15 more
core   +1 more source

Detection of acoustic‐gravity waves in lower ionosphere by VLF radio waves [PDF]

Geophysical Research Letters, 2013
We present a new method to study harmonic waves in the low ionosphere (60–90 km) by detecting their effects on reflection of very low frequency (VLF) radio waves. Our procedure is based on amplitude analysis of reflected VLF radio waves recorded in real time, which yields an insight into the dynamics of the ionosphere at heights where VLF radio waves ...
Nina, Aleksandra, Cadez, Vladimir
openaire   +2 more sources

A Soft Robotic Device for Targeted Massage Therapy of Residual Limbs

Advanced Robotics Research, EarlyView.
Residual limb edema after amputation can hinder recovery and delay prosthetic fitting. This study presents a soft‐robotic wearable device that delivers sequential compression through pneumatic McKibben actuators. By replicating the principles of manual lymphatic drainage, the device generates controlled mechanotherapeutic pressure patterns, providing a
Maria Grazia Polizzotto, Alessio Capecchi, Maartje Van der Lingen, Emanuele Gruppioni, Arianna Menciassi, Linda Paternò   +5 more
wiley   +1 more source