Results 271 to 280 of about 54,131 (295)

Raman solitons with group velocity dispersion

Physical Review E, 2006
We consider the coupled propagation of the pump and Stokes waves in a Raman active medium accounting for the group velocity walk off and group velocity dispersion. Interplay of the Raman coherence and the dispersion can lead to the formation of a complete band gap in the spectrum of linear waves consisting of the two consecutive subgaps located at ...
D V, Skryabin, A V, Yulin
openaire   +2 more sources

Seed Dispersal Velocity in Four Dwarfmistletoes

Science, 1965
By means of a high-speed photographic technique, the initial velocities of seeds were studied as they were expelled from the fruits of four Colorado dwarfmistletoes: Arceuthobium douglasii , A. campylopodum f. cyanocarpum , A. vaginatum f.
T E, Hinds, F G, Hawksworth
openaire   +2 more sources

Dispersion of 3D Velocity Estimators

EAGE/SEG Workshop - Depth Imaging of Reservoir Attributes, 1998
We study the dispersion of the estimators of a 3D velocity model in presence of white noise and with a limited range of azimuths available.
S. Grion, P. Ruffo, F. Rocca
openaire   +1 more source

Dispersion of components in transport processes: Velocity dispersion model

Journal of Colloid and Interface Science, 2005
This paper presents a new model of dispersion of components in transport processes. It is suggested that the flow velocity may be specified by a Gauss function with relative dispersion of flow velocity beta=sigmav/v; the overall dispersion of inert component (in porous as well as in homogeneous medium) may be calculated from the equation sigma=(2Dt ...
openaire   +2 more sources

Dispersion in developing velocity fields

AIChE Journal, 1968
AbstractConvective diffusion in laminar flows which develop from rest and in the velocity entrance region of tubes, is studied. Criteria for the validity of the simple dispersion model are established by comparison of analytical results with numerical experiments.It is found that the extent of dispersion is less in developing velocity fields than in ...
William N. Gill, V. Ananthakrishnan, Richard J. Nunge   +2 more
openaire   +1 more source

Velocity dispersions across bulge types

AIP Conference Proceedings, 2010
We present first results from a long‐slit spectroscopic survey of bulge kinematics in local spiral galaxies. Our optical spectra were obtained at the Hobby‐Eberly Telescope with the LRS spectrograph and have a velocity resolution of 45 km/s (σ*), which allows us to resolve the velocity dispersions in the bulge regions of most objects in our sample.
Fabricius, M., Saglia, R., Drory, N., Fisher, D., Bender, R., Hopp, U.   +5 more
openaire   +3 more sources

VELOCITY DISPERSION OF SEISMIC WAVES*

Geophysical Prospecting, 1971
SummaryIn well velocity surveys made to calibrate Sonic (CV) Logs the calibration survey uses frequencies around 50 Hz whereas the Sonic Logging tool uses frequencies around 20 kHz. There thus exists the possibility of making a direct measure of velocity dispersion. In any one survey the disturbing factors, both instrumental and operational, will often
P. N. S. O'BRIEN, A. L. LUCAS
openaire   +1 more source

Ultrasonic velocity dispersion in methylcyclohexane

Pramana, 1974
Ultrasonic velocity dispersion in methylcyclohexane was studied in the frequency range of 0.5 to 5.0 MHz at 60°, 65°, 70°, 75° and 80°C using a variable path interferometer. Necessary corrections for the diffraction of the ultrasonic beam were applied.
E Rajagopal, S V Subrahmanyam
openaire   +1 more source

Normal group-velocity dispersion Kerr frequency comb

Optics Letters, 2011
We show via numerical simulation that Kerr frequency combs can be generated in a nonlinear resonator characterized with normal group-velocity dispersion. We find the spectral shape of the comb and temporal envelope of the corresponding optical pulses formed in the resonator.
A B, Matsko, A A, Savchenkov, L, Maleki
openaire   +2 more sources

Velocity dispersion in Brillouin scattering

Canadian Journal of Physics, 1969
The dispersion relations for the velocity v for temporally absorbed hypersonic waves and for the velocity vB as determined from the positions of the Doppler-shifted Brillouin peaks are discussed for a single relaxation process. The difference between v and vB is significant whenever the sound absorption per cycle is not much smaller than unity.
A. B. Bhatia, E. Tong
openaire   +1 more source