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Full-Text Articles in Physical Sciences and Mathematics
Concentration Gradient, Diffusion, And Flow Through Open Porous Medium Near Percolation Threshold Via Computer Simulations, Ras B. Pandey, J.F. Gettrust, D. Stauffer
Concentration Gradient, Diffusion, And Flow Through Open Porous Medium Near Percolation Threshold Via Computer Simulations, Ras B. Pandey, J.F. Gettrust, D. Stauffer
Faculty Publications
The interacting lattice gas model is used to simulate fluid flow through an open percolating porous medium with the fluid entering at the source-end and leaving from the opposite end. The shape of the steady-state concentration profile and therefore the gradient field depends on the porosity (p). The root mean square (rms) displacements of fluid and its constituents (tracers) show a drift power-law behavior, R∝t in the asymptotic regime (t→∞). The flux current density (j) is found to scale with the porosity according to, j∝(Δp)β with Δp …
Dirt Road Corrugations, Temple H. Fay, Keith A. Hardie, Stephan V. Joubert
Dirt Road Corrugations, Temple H. Fay, Keith A. Hardie, Stephan V. Joubert
Faculty Publications
WE CONSIDER FACTORS INFLUENCING the build-up of corrugations on dirt roads and the reactions of vehicles to them. We suggest that corrugations are (at least in part) a consequence of a natural tangential oscillation of the tread surface of the car lure that occurs when the vehicle is being driven or braked. Secondly, we suggest that the unpleasant vibration experienced by a vehicle passing over a corrugated road is the result of a beat produced by the difference of the frequency of oscillation of its own tyres and the frequency of the stimulation received by the vehicle due to passage …
Comment On "Observation Of Superluminal Behaviors In Wave Propagation", Harry Ringermacher, Lawrence R. Mead
Comment On "Observation Of Superluminal Behaviors In Wave Propagation", Harry Ringermacher, Lawrence R. Mead
Faculty Publications
No abstract provided.
Design Of Peptides With, Α,Β-Dehydro-Residues: A Dipeptide With A Branched Β-Carbon Dehydro-Residue At The (I+1) Position, Methyl N-(Benzyloxycarbonyl)-Α,Β-Didehydrovalyl-L-Tryptophanate, Vijayaraghavan Rangachari, Pravindra Kumar, Sharmistha Dey, Tej P. Singh
Design Of Peptides With, Α,Β-Dehydro-Residues: A Dipeptide With A Branched Β-Carbon Dehydro-Residue At The (I+1) Position, Methyl N-(Benzyloxycarbonyl)-Α,Β-Didehydrovalyl-L-Tryptophanate, Vijayaraghavan Rangachari, Pravindra Kumar, Sharmistha Dey, Tej P. Singh
Faculty Publications
The structure of the title peptide, C25H27N3O5, has been determined and its conformation analysed. Values of the standard peptide torsion angles are φ(1) = -44.2 (3)°, ψ(1) = 135.9 (2)°, φ(2) = -141.6 (2)° and ψ(T/2) = 168.0 (2)°. The crystal structure is stabilized by an intermolecular hydrogen bond, with an N···O distance of 2.919 (3)Å, which is formed between screw-axis-related NH and CO groups of dehydrovaline residues.