Results 261 to 270 of about 145,583 (300)
Some of the next articles are maybe not open access.
The Kirkendall effect in multiphase diffusion
Acta Materialia, 2004Recently, the presence of two Kirkendall planes has been discovered in solid-state diffusion couples in various binary metallic systems in our laboratory, and in this work even three Kirkendall marker planes were found in a couple Ti/TiAl3. The bifurcation and trifurcation of the Kirkendall plane can quantitatively be described using the classical ...
Paul, A. +3 more
openaire +2 more sources
Baro-Diffusion Effect on Diffusion Time
The Physics of Fluids, 1967The evolution of the concentration distribution of a small quantity of a heavy gas diffusing in the steady flow field of a lighter gas is investigated. Two cases are treated: (1) the lighter parent gas is initially in rigid body rotation, (2) it is initially at rest under a strong body force.
openaire +1 more source
Ternary diffusion and effective diffusion coefficients in alveolar spaces
Respiration Physiology, 1980An experimentally verified mathematical model of non-equimolar ternary gas diffusion is applied to simulate the conditions existing in the alveolar spaces. When a fictitious gas film is erected a certain distance away from the alveolar membrane, and when the compositions at the two boundaries of the film are, respectively, the alveolar gas composition ...
H K, Chang, L E, Farhi
openaire +2 more sources
Ecology, 2000
In order to explore the extent to which interactions between pairs of species embedded in complex multispecies food webs are nonlocalized, in terms of the number of other species that need to be taken into account, the influence of other species in the system on the response of the hake fishery to a cull of fur seals is calculated in a 29-species food ...
openaire +1 more source
In order to explore the extent to which interactions between pairs of species embedded in complex multispecies food webs are nonlocalized, in terms of the number of other species that need to be taken into account, the influence of other species in the system on the response of the hake fishery to a cull of fur seals is calculated in a 29-species food ...
openaire +1 more source
Dopant diffusion in silicides: Effect of diffusion paths
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1992While dopants implanted in well annealed WSi2 show no lattice diffusion and only limited grain-boundary diffusion at temperatures up to 900 °C, on the contrary, rapid diffusion is observed at temperatures as low as 300 °C when the implantation takes place in the as-deposited amorphous silicide.
C. Stanis +5 more
openaire +1 more source
Biotechnology and Bioengineering, 1998
Experimental measurements of effective diffusive permeabilities and effective diffusion coefficients in biofilms are reviewed. Effective diffusive permeabilities, the parameter appropriate to the analysis of reaction-diffusion interactions, depend on solute type and biofilm density.
openaire +2 more sources
Experimental measurements of effective diffusive permeabilities and effective diffusion coefficients in biofilms are reviewed. Effective diffusive permeabilities, the parameter appropriate to the analysis of reaction-diffusion interactions, depend on solute type and biofilm density.
openaire +2 more sources
Measurements of the effect of molecular diffusivity in turbulent diffusion
Journal of Fluid Mechanics, 1960Townsend (1954) has shown that turbulent vorticity may rotate and strain a diffusion wake, thereby increasing the contribution of molecular diffusion to the total mean dispersion over short diffusion times. To test whether any such effect occurs at longer diffusion times, the lateral dispersion of both helium and of carbon dioxide in air were measured ...
openaire +2 more sources
Effect of Diffusion on Dispersion
SPE Annual Technical Conference and Exhibition, 2008AbstractWe study dispersion in porous media by tracking movement of a swarm of solute particles through a physically representative network model. We developed deterministic rules to trace paths of solute particles through the network. These rules yield flow streamlines through the network comparable to those obtained from a full solution of Stokes ...
Raman K. Jha +2 more
openaire +1 more source
Effects of differential diffusion on unsteady diffusion flames
International Communications in Heat and Mass Transfer, 1998The effects of differential diffusion on unsteady diffusion flames are considered for one-dimensional geometries. A Stefan problem is obtained for a single planar flame separating two semi-infinite regions containing fuel and oxidizer. Non-unity diffusivity ratio and the stoichiometry affect strongly the flame evolution and determine the conditions to ...
openaire +1 more source
Diffusion of Intervention Effects
Journal of Adolescent Health, 2016Dennis M. Gorman +2 more
openaire +2 more sources