We discuss and compare different approaches to calculating the dynamics of anisotropic flow structure formation in quasi two-dimensional turbulence based on potential vorticity (PV) transport in real space. The general structure of the PV flux in the relaxation processes is deduced non-perturbatively. The transport coefficients of the PV flux are then systematically calculated using perturbatio...

The recently approved Juno mission will orbit Jupiter for one year in a highly eccentric (rmin = 1.06RJup, rmax = 39RJup) polar orbit (i = 90 deg) to accurately map, among other things, the jovian magnetic and gravitational fields. Such an orbital configuration yields an ideal situation, in principle, to attempt a measurement of the general relativistic Lense-Thirring effect through the Juno’s ...

Up to now attempts to measure the general relativistic LenseThirring effect in the gravitational field of Earth have been performed by analyzing a suitable J2 − J4−free combination of the nodes Ω of LAGEOS and LAGEOS II and the perigee ω of LAGEOS II with the Satellite Laser Ranging technique. The claimed total accuracy is of the order of 20-30%, but, according to some scientists, it could be a...

The re-isolation of trace anlOunts of virus added to tissue hOInogenates has been taken as a Inodel probleIll in the developIllent of high-resolution Illethods for separating particles. FroIll a review of data on these particles, it was found that, when sediIllentation rates are plotted against their banding or buoyant densities, IllOst viI'uses fall in a "window" which appears to be free of ot...

A system of remotely detecting vocal fold pathologies using telephone quality speech is presented. Using VoiceXML, a database of 631 clean speech files of the sustained phonation of the vowel sound /a/ (58 normal subjects, 573 pathologic) from the Disordered Voice Database Model 4337 was transmitted over telephone channels to produce a test corpus. Pitch perturbation features, amplitude perturb...

There are typically several perturbation methods for approaching the solution of weakly nonlinear vibrations (where terms “small” compared to linear ones): Method Strained Parameters, Naive Singular Perturbation Method, Multiple Scales, Harmonic Balance and Averaging. The Straightforward Expansion (SEPM) applied does not usually yield correct solutions. In this manuscript, we provide mathematic...

Other than scattering problems where perturbation theory is applicable, there are basically two ways to solve problems in physics. One is to reduce the problem to harmonic oscillators, and the other is to formulate the problem in terms of two-by-two matrices. If two oscillators are coupled, the problem combines both two-by-two matrices and harmonic oscillators. This method then becomes a powerf...

Zonal centrifugation, based either on sediInentation rate or on isopycnic banding in liquid density gradients, is useful for high-resolution separation of subcellular particles. However, the amoun t of material which may be separated is extremely limited when conventional centrifuges are employed. To increase the capacity and, in certain instances, the resolution of the method, the possibility ...

Sufficient amounts of influenza virus (density, 1.185; size, 722S) can be highly purified (22,000 chicken cell agglutinating units per milligram of protein) with a zonal ultracentrifuge, used first in a rate process followed by isopycnic banding, to permit its detailed biological and physical-chemical evaluation.

We examine how the new forthcoming Earth gravity models from the CHAMP and, especially, GRACE missions could improve the measurement of the general relativistic Lense–Thirring effect according to the various kinds of observables which could be adopted. In a very preliminary way, we use the first recently released EIGEN2 CHAMP– only and GGM01C GRACE–based Earth gravity models in order to assess ...