In this report we investigate the linear and nonlinear stability of stationary, constant solutions to the Cauchy problem of quasilinear, symmetric hyperbolic systems of equations. Writing the problem as u t = d X j=0 ? A 0j + "A 1j (x; t; u; ") with u(t = 0) = f(x); we say that the problem is non-linearly stable if, for " small enough, the solution u stays smooth for all t 0 and its maximum nor...

We study a new type of large-scale instability in obliquely rotating stratifi ed fl uids with small-scale nonhelical turbulence. The turbulence is generated by the external force zero helicity and low Reynolds number. theory uses method multiscale asymptotic expansions. nonlinear equations for motions are obtained third order perturbation theory. consider linear stationary modes. Solutions form...

Unconventional reservoir resources are important to supplement energy consumption and maintain the balance of supply demand in oil gas market. However, due complex geological conditions, it is a signi?cant challenge develop unconventional reservoirs ef?ciently economically. At present, exten-sively studied, covering wide range areas, with special attention multiscale characterization pore struc...

The steady ow of viscoplastic uids through brous porous media is studied numerically and theoretically. We consider uids with a plastic yield stress and a rate-dependent viscosity that can be described by the HerschelBulkley model. We rst investigate the pore-scale ow characteristics through numerical simulations for ow transverse to a square array of bers with comprehensive parametric studies ...

The purpose of this study was to elucidate the processes controlling the distribution and behavior of the longerlived Ra isotopes in continuous Paleozoic carbonate aquifers of parts of Missouri, Kansas, and Oklahoma. Activities of (Ra) and (Ra) were analyzed in fresh and saline ground waters, brines, and rocks. The ̄uids have a wide salinity range (200±250,000 mg lÿ1 total dissolved solids). Th...

We report an experimental investigation on the relationship between the thickness of the viscous boundary layer and the highest excitation (or cuto ) frequency of the temperature power spectrum in turbulent convection, using water as working uid. For the range of the Rayleigh number spanned in the experiment (10–10), we con rm that the peak position in the cuto frequency pro le can be used as a...

6th June, 1925.?No response to quinine (grs. 5 t.d.s.) given from 2nd June, 1925, 9-30 p.m. Temperature 106?F. Intravenous injection of quinine bihydrochloride (grs. 3). 7th June, 1925.?8 a.;m. Temperature 98.6?F. Intravenous injection of quinine bihydrochloride (grs. 2i). Urine now distinctly "milky," showed marked chyluria and the microscope revealed a large number of microfilariae. The quini...

The nonlinear Burnett coeecients are the Tay-lor series coeecients for the functional dependence describing how the Thermodynamic Flux responds to a Thermodynamic Force acting on a uid. Ernst et. al. computed the functional dependence exactly for a hard disk/sphere uid (a uid made up of idealised billiard balls) undergoing shear ow, and found that the relationship was non-analytic, i.e. that th...

Well-defi ned, functional colloids provide critical model systems for a variety of fundamental phenomena in materials and soft matter, and enable a broad range of technological applications from optics [ 1 ] to biotechnology. [ 2 ] The ability to fabricate large quantities of colloids with high uniformity and specifi ed shape and function has thus been greatly desired. For example, magnetic col...

The UML suggests the employment of use cases for capturing the requirements and for specifying the interaction between the users and the system being modeled. Use cases are easily understood by users since they are essentially textual descriptions, but lack the precision and the conciseness accomplished by the other diagrammatic tools of UML. Besides, there is no systematic method that helps th...