Towards a statistical theory of transport by strongly-interacting lattice fermions

We present a study of electric transport at high temperature in a model of strongly interacting spinless fermions without disorder. We use exact diagonalization to study the statistics of the energy eigenvalues, eigenstates, and the matrix elements of the current. These suggest that our nonrandom Hamiltonian behaves like a member of a certain ensemble of Gaussian random matrices. We calculate the conductivity $\sigma(\omega)$ and examine its behavior, both in finite size samples and as extrapolated to the thermodynamic limit. We find that $\sigma(\omega)$ has a prominent non-divergent singularity at $\omega=0$ reflecting a power-law long-time tail in the current autocorrelation function that arises from nonlinear couplings between the long-wavelength diffusive modes of the energy and particle number

Fluoride poisoning and the effect on collagen biosynthesis of osseus and non-osseus tissues of rabbit

Fluoride poisoning Is known to cause a debilitating condition clinically referred to as Fluorlsls. The present Investigation on the experimental animal model has been carried out to collect Information on the precise nature of fluoride action, with special reference to collagen biosynthesis. Rabbits subjected to Fluoride poisoning for varying time Intervals were administered with carbon labelled proline. Both osseus and non-osseus tissues were analyzed to measure the rate of Incorporation of labelled proline, and Index for collagen biosynthesis. Part I of the article is dealing with 14C proline uptake by Hydrolyzed collagen (obtained by centrifugation at 5000 × g) and residual protein of tissues viz: Bone, Tendon, Muscle, Kidney cortex, Skin, Lung, Pinna and Trachea. Part II of the article Is dealing with 14C proline uptake by different fraction of collagen Viz: collagenase digested fraction and separated by centrifugation at 9000 × g ; native collagen fibril, acid soluble collagen, alkali soluble collagen and non-collagenous protein. The results obtained In Part I, suggest that In Fluoride poisoning collagen biosynthesis has been greatly impaired both In osseus and non-ossues tissues. This has been further confirmed by the results obtained in Part II of the investigation

Nernst effect in the vortex-liquid regime of a type-II superconductor

We measure the transverse thermoelectric coefficient $\alpha_{xy}$ in simulations of type-II superconductors in the vortex liquid regime, using the time-dependent Ginzburg-Landau (TDGL) equation with thermal noise. Our results are in reasonably good quantitative agreement with experimental data on cuprate samples, suggesting that this simple model of superconducting fluctuations contains much of the physics behind the large Nernst effect observed in these materials.Comment: 6 pages. Expanded version of text. New Fig.

Analysis of physical-chemical processes governing SSME internal fluid flows

The efforts to adapt CHAM's computational fluid dynamics code, PHOENICS, to the analysis of flow within the high pressure fuel turbopump (HPFTP) aft-platform seal cavity of the SSME are summarized. In particular, the special purpose PHOENICS satellite and ground station specifically formulated for this application are listed and described, and the preliminary results of the first part two-dimensional analyses are presented and discussed. Planned three-dimensional analyses are also briefly outlined. To further understand the mixing and combustion processes in the SSME fuelside preburners, a single oxygen-hydrogen jet element was investigated