Results 61 to 70 of about 296,267 (293)

Gravitational waves in modified teleparallel theories of gravity

, 2018
Teleparallel theory of gravity and its modifications have been studied extensively in literature. However, gravitational waves has not been studied enough in the framework of teleparallelism.
Abedi, Habib, Capozziello, Salvatore
core   +1 more source

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

Advanced Materials Interfaces, EarlyView.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad, Vandana Molahalli, Apichart Pattanaporkratana, Nattaporn Chattham   +3 more
wiley   +1 more source

Gravity waves generated by the Hunga Tonga–Hunga Ha′apai volcanic eruption and their global propagation in the mesosphere/lower thermosphere observed by meteor radars and modeled with the High-Altitude general Mechanistic Circulation Model [PDF]

Atmospheric Chemistry and Physics
The Hunga Tonga–Hunga Ha′apai volcano erupted on 15 January 2022, launching Lamb waves and gravity waves into the atmosphere. In this study, we present results using 13 globally distributed meteor radars and identify the volcanogenic gravity waves in the
G. Stober, G. Stober, S. L. Vadas, E. Becker, A. Liu, A. Kozlovsky, D. Janches, Z. Qiao, W. Krochin, W. Krochin, G. Shi, G. Shi, W. Yi, J. Zeng, J. Zeng, J. Zeng, P. Brown, P. Brown, D. Vida, N. Hindley, C. Jacobi, D. Murphy, R. Buriti, V. Andrioli, V. Andrioli, P. Batista, J. Marino, S. Palo, D. Thorsen, M. Tsutsumi, M. Tsutsumi, N. Gulbrandsen, S. Nozawa, M. Lester, K. Baumgarten, J. Kero, E. Belova, N. Mitchell, N. Mitchell, T. Moffat-Griffin, N. Li   +40 more
doaj   +1 more source

Gravity waves in three dimensions [PDF]

Physical Review D, 2015
We find the explicit forms of the anti-de Sitter plane, anti-de Sitter spherical, and pp waves that solve both the linearized and exact field equations of the most general higher derivative gravity theory in three dimensions. As a sub-class, we work out the six derivative theory and the critical version of it where the masses of the two spin-2 ...
Gürses, M., Şişman, T.C., Tekin, B.
openaire   +5 more sources

Gravity waves in severe weather [PDF]

, 1986
With a view to determining the role of severe weather in producing gravity waves, two tests were made. In the first, the wind speed measured at two nearby radiosonde stations, Peoria and Salem, was correlated with the stratosphere gravity-wave intensity ...
Bowhill, S. A., Gnanalingam, S.
core   +1 more source

Hydrogel‐Based 3D‐Printable Stretchable Pressure Sensor

Advanced Materials Technologies, EarlyView.
We present a carbon‐black‐functionalized double‐network granular hydrogel (DNGH) pressure sensor capable of detecting pressures from 200 Pa, equivalent to a light finger touch, up to 500 kPa. The sensor exhibits signal drifts below 3.5% after 800 cycles and response times around 80 ms. Leveraging this broad sensing range, we 3D print this material into
Tianyu Yuan, Chenzhuo Li, Antonia Georgopoulou, John M. Kolinski, Esther Amstad   +4 more
wiley   +1 more source

Acoustic gravity wave growth and damping in convecting plasma [PDF]

Annales Geophysicae, 1994
The propagation of acoustic gravity waves through steadily convecting plasma in the thermosphere has been analysed theoretically. The growth and damping rates of internal gravity waves due to the feedback effects of wave-modulated Joule heating and ...
T. R. Robinson
doaj   +1 more source

Geodesic deviation in pp-wave spacetimes of quadratic curvature gravity

, 2003
We write the equation of geodesic deviations in the spacetime of $pp$-waves in terms of the Newman-Penrose scalars and apply it to study gravitational waves in quadratic curvature gravity.
A. Accioly, A. Balakin, A. Balakin, D. Christodoulou, E.C. de Rey Neto, E.C. de Rey Neto, Edgard C. de Rey Neto, F. Canfora, F.A.E. Piran, H.-J. Schmidt, H.A. Buchdahl, J. Bičák, K. Hayashi, M. Kunzinger, M.D. Roberts, P.D. Mannheim, R. Kerner, R. Steinbauer   +17 more
core   +1 more source

Direct Gravity‐Induced Modulation of Cardiac Conduction Pathways Evidenced Through Propagation Features in Electrophysiological Mapping

Advanced Materials Technologies, EarlyView.
A high‐density wearable body‐surface potential mapping array reveals how gravity reshapes cardiac conduction in real time. By resolving spatiotemporal delay patterns invisible to conventional ECG, the platform uncovers posture‐dependent electrophysiological adaptations across the thorax.
Ruben Ruiz‐Mateos Serrano, Matias L. Picchio, Daniele Mantione, David Mecerreyes, George G. Malliaras   +4 more
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