Results 71 to 80 of about 1,009,021 (294)

Fundamental Gravity and Gravitational Waves [PDF]

Symmetry, 2021
While being as old as general relativity itself, the gravitational two-body problem has never been under so intense investigation as it is today, spurred by both phenomenological and theoretical motivations. The observations of gravitational waves emitted by compact binary coalescences bear the imprint of the source dynamics, and as the sensitivity of ...
openaire   +1 more source

Life‐Like Ferrous Oxide Microspheres from Kombucha

Advanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis, Anna Nikolaidou, Andrew Adamatzky   +2 more
wiley   +1 more source

Lidar soundings of the middle atmosphere: Temperature, gravity waves and noctilucent clouds [PDF]

, 2019
Earth’s middle atmosphere between 10 and 100 km is home to gigantic waves, storms and mysterious clouds. High-repetition soundings with a pulsed Nd:Yag laser at 532 nm (a Rayleigh lidar) open the window into this middle-world between ground and space. We
Kaifler, Natalie
core  

Millifluidic Synthesis of Core–Shell Resonators For Tunable Sonic BandGaps in Acoustic Metamaterials

Advanced Materials Interfaces, EarlyView.
Millimeter‐scale core–shell acoustic resonators are fabricated by a gravity‐assisted dripping approach and incorporated into epoxy composites at controlled volume fractions. The resulting alumina–core resonator composites show tunable low‐frequency acoustic attenuation, demonstrating a scalable route for integrating locally resonant metamaterial units ...
Colton Steiner, Xiaohui Shen, Bianka Pajo, Chin‐Teh Sun, Jeffrey P. Youngblood, Carlos Martinez   +5 more
wiley   +1 more source

PARAMETRIC GRAVITY WAVE DETECTOR [PDF]

Electromagnetic Probes of Fundamental Physics, 2003
Since 1978 superconducting coupled cavities have been proposed as a sensitive detector of gravitational waves. The interaction of the gravitational wave with the cavity walls, and the esulting motion, induces the transition of some energy from an initially excited cavity mode to an empty one.
GEMME, G., CHINCARINI, A., PARODI, R., BERNARD, PH., PICASSO, E.   +4 more
openaire   +3 more sources

An intrusion layer in stationary incompressible fluids: Part 1: Periodic waves [PDF]

, 2006
Waves on a neutrally buoyant intrusion layer moving into otherwise stationary fluid are studied. There are two interfacial free surfaces, above and below the moving layer, and a train of waves is present.
DUNCAN E. FARROW, Forbes, L.K., Farrow, D.E., LAWRENCE K. FORBES, GRAEME C. HOCKING, Hocking, G.C.   +5 more
core   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Observations of in-situ generated gravity waves during a stratospheric temperature enhancement (STE) event [PDF]

Atmospheric Chemistry and Physics, 2011
Evidence for in situ generated atmospheric gravity waves associated with a stratospheric temperature enhancement (STE) are presented. The signatures of two sets of gravity waves are observed by molecular-aerosol lidar in conjunction with the early ...
A. J. Gerrard, Y. Bhattacharya, J. P. Thayer   +2 more
doaj   +1 more source

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

Mathematical modelling for gravity waves interactions coupled with localized water vapor and ozone in the atmosphere

Frontiers in Earth Science
In the atmosphere, the interrelationship between dynamics and chemistry results in mutual influence and interaction. The behavior of internal gravity waves is influenced by the thermal effects caused by chemical components present in the atmosphere.
Ahmed S. Almohaimeed
doaj   +1 more source