Results 21 to 30 of about 1,372,433 (300)

Noise sensitivity of an atomic velocity sensor [PDF]

, 2005
We use Bloch oscillations to accelerate coherently Rubidium atoms. The variation of the velocity induced by this acceleration is an integer number times the recoil velocity due to the absorption of one photon. The measurement of the velocity variation is
Battesti, C. Schwob, Dahan, F. Biraben, F. Nez, Gupta, Hall, Kasevich, L. Julien, Moler, P. Cladé, Peik, Peters, S. Guellati-Khélifa, Taylor, Weiss   +15 more
core   +3 more sources

Comparison of Linear Methods for the Determination of Propagation Coefficient in Arterials Systems: Numerical Investigation

Journal of Biomechanical Science and Engineering, 2009
To get a deeper insight into the factors affecting the vascular hemodynamic, the propagation coefficient (γ) should be calculated. However, results from estimated method of this quantity are conflicting.
Khaled BEN ABDESSALEM, Saber BEN ABDESSALEM, Wasila SAHTOUT   +2 more
doaj   +1 more source

Attenuation and Phase Velocity of Elastic Wave in Textured Polycrystals with Ellipsoidal Grains of Arbitrary Crystal Symmetry

Acoustics, 2020
This study extends the second-order attenuation (SOA) model for elastic waves in texture-free inhomogeneous cubic polycrystalline materials with equiaxed grains to textured polycrystals with ellipsoidal grains of arbitrary crystal symmetry.
Gaofeng Sha
doaj   +1 more source

Negative phase velocity in nonlinear oscillatory systems --mechanism and parameter distributions

, 2007
Waves propagating inwardly to the wave source are called antiwaves which have negative phase velocity. In this paper the phenomenon of negative phase velocity in oscillatory systems is studied on the basis of periodically paced complex Ginzbug-Laundau ...
GANG HU, Grigorenko A. N., HONG ZHANG, PENGFEI LI, ZHOUJIAN CAO   +4 more
core   +1 more source

Phase Transitions in Rotating Neutron Stars [PDF]

, 1998
As rotating neutron stars slow down, the pressure and the density in the core region increase due to the decreasing centrifugal forces and phase transitions may occur in the center.
A. Akmal, C. P. Lorenz, D. B. Kaplan, D. G. Ravenhall, G. Baym, G. Baym, G. Baym, G. F. Chapline, H. A. Bethe, H. Heiselberg, H. Heiselberg, H. Heiselberg, Henning Heiselberg, J. B. Hartle, J. C. Collins, J. R. C. Tolman, J. R. Oppenheimer, J. Schaffner, J. Tassoul, Morten Hjorth-Jensen, N. Glendenning, N. K. Glendenning, W. L. Slattery, Ø. Elgarøy   +23 more
core   +2 more sources

Ambient Noise Tomography of the Shandong Province and its Implication for Cenozoic Intraplate Volcanism in Eastern China

Geochemistry, Geophysics, Geosystems, 2018
New images of shear wave velocity (VS) structure of the crust and uppermost mantle in the Shandong province of China are presented based on inversion of ambient seismic noise data from 47 broadband stations.
Cuilin Li, Chuanxu Chen, Dongdong Dong, Ayodeji Paul Kuponiyi, Stan E. Dosso, Daolei Su   +5 more
doaj   +1 more source

Characterization of soil stiffness anisotropy at small strains based on phase velocities of shear waves measured by novel testing apparatus [PDF]

E3S Web of Conferences
For the characterization of soil stiffness anisotropy at small strains and the calculation of soil elastic constants derived from the cross-anisotropic model, it is important to obtain stress wave phase velocities of soils in both principal and oblique ...
Liu Junming, Otsubo Masahide, Kuwano Reiko   +2 more
doaj   +1 more source

Volume-averaged macroscopic equation for fluid flow in moving porous media

, 2014
Darcy's law and the Brinkman equation are two main models used for creeping fluid flows inside moving permeable particles. For these two models, the time derivative and the nonlinear convective terms of fluid velocity are neglected in the momentum ...
Guo, Zhaoli, Mi, Jianchun, Wang, Lian-Ping, Wang, Liang   +3 more
core   +1 more source

Coronal Mass Ejections Associated with Slow Long Duration Flares [PDF]

, 2013
It is well known that there is temporal relationship between coronal mass ejections (CMEs) and associated flares. The duration of the acceleration phase is related to the duration of the rise phase of a flare.
Bak-Steslicka, U., Kolomanski, S., Mrozek, T.   +2 more
core   +2 more sources

Fully nonlinear inversion of fundamental mode surface waves for a global crustal model [PDF]

, 2007
We use neural networks to find 1-dimensional marginal probability density functions (pdfs) of global crustal parameters. The information content of the full posterior and prior pdfs can quantify the extent to which a parameter is constrained by the data.
A. Curtis, Bassin, Beghein, Boschi, Brocher, Christensen, Devilee, Ekström, J. Trampert, Meier, Mitra, Montagner, Mosegaard, Ritzwoller, Sambridge, Sambridge, Shapiro, Tarantola, Tarantola, Trampert, U. Meier, Woodhouse   +21 more
core   +1 more source