Results 91 to 100 of about 454,599 (183)

Virial mass in DGP brane cosmology

, 2009
We study the virial mass discrepancy in the context of a DPG brane-world scenario and show that such a framework can offer viable explanations to account for the mass discrepancy problem.
Bohmer C G, Carlberg R G, H R Sepangi, Heydari-Fard M, Jackson J C, Mannheim P D, Milgrom M, Mohammedi N, Reiprich T H, S Shahidi   +9 more
core   +1 more source

A Robust Workflow for Acquiring and Preprocessing Ambient Vibration Data from Small Aperture Ocean Bottom Seismometer Arrays to Extract Scholte and Love Waves Phase-Velocity Dispersion Curves. [PDF]

Pure Appl Geophys, 2022
Lontsi AM, Shynkarenko A, Kremer K, Hobiger M, Bergamo P, Fabbri SC, Anselmetti FS, Fäh D.   +7 more
europepmc   +1 more source

Stellar kinematics in double-barred galaxies: the sigma-hollows

, 2008
We present SAURON integral-field stellar velocity and velocity dispersion maps for four double-barred early-type galaxies: NGC2859, NGC3941, NGC4725 and NGC5850.
A. de Lorenzo-Cáceres, A. Vazdekis, Berentzen, Bureau, Corsini, Debattista, Englmaier, Erwin, Friedli, Heller, I. Martínez-Valpuesta, J. Falcón-Barroso, Laine, Maciejewski, Martinet, Martinez-Valpuesta, Moiseev, Shen, Shlosman, Vazdekis, Wozniak, York   +21 more
core   +1 more source

Linear Boltzmann Equation for Solute Dispersion in Heterogeneous Media Under Non-Ergodic Conditions

ARC Geophysical Research
We study solute dispersion under non-ergodic conditions using a Boltzmann equation for the evolution of the joint distribution of the position and speed of solute particles in steady spatially heterogeneous flow fields.
Marco Dentz, Arash Massoudieh
doaj   +1 more source

Two-Particle Dispersion in Model Velocity Fields

, 1999
We consider two-particle dispersion in a velocity field, where the relative two-point velocity scales according to $v^{2}(r)\propto r^{\alpha}$ and the corresponding correlation time scales as $\tau (r)\propto r^{\beta}$, and fix $\alpha =2/3$, as ...
Sokolov, I. M.
core   +1 more source

Optical frequency-dependent opposite effective acoustic velocity dispersion in stimulated Brillouin scattering

APL Photonics
Optical fibers serve not only as optical waveguides but also as acoustic waveguides, a dual functionality stemming from their structural properties and further enhanced by doping techniques.
Juntong Yang, Yuelang Huang, Yuan Wang, Liang Chen, Xiaoyi Bao   +4 more
doaj   +1 more source

Multichannel Analysis of Ambient Noise Surface Waves Based on Semblance Phase-Shift Method

Remote Sensing
Ambient noise surface wave exploration is one of the fields of interest in geophysical research. Extracting dispersion curves and inverting the S-wave velocity structure from the dispersion characteristics is also of primary importance.
Lu Liu, You Tian, Yang Liu, Jiawei Chen, Honghao Li   +4 more
doaj   +1 more source

Increased Molecular Gas Velocity Dispersion and Star Formation Efficiency in Barred Galaxy Centres

The Astronomical Journal
Work by the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) collaboration found higher molecular gas surface densities and velocity dispersions in the centers of barred galaxies compared to unbarred galaxies.
Jennifer M. Laing, Christine D. Wilson
doaj   +1 more source

Regular perturbation on the group-velocity dispersion parameter for nonlinear fibre-optical communications. [PDF]

Nat Commun, 2020
Oliari V, Agrell E, Alvarado A.
europepmc   +1 more source

Research on 3D frequency dispersion inverse imaging of channel wave in coal seam working face

Meitan xuebao
At present, most of the techniques for inverting coal thickness through channel wave dispersion are based on the theoretical dispersion curve to select a single frequency for velocity CT tomography imaging, and the accuracy of the inverted coal thickness
Guangzhong JI, Keyue LIU, Zhiyong LI, Peihong GUO, Man GUO, Guowei FAN, Zean HU   +6 more
doaj   +1 more source