Factors influencing cross-national diffusion of mental health policy are important to understand but complex to research. This commentary discusses Shen’s research study on cross-national diffusion of mental health policy; examines the extent to which the three questions researched by Shen (whether countries are more likely to have a mental health policy (a) the earlier a country becomes a memb...

- The mechanism of diffusion layer growth in plasma nitrided coatings applied on a St52 steel using an active screen is investigated. The nitriding was performed at 450,500 and 550 ◦C temperature nitriding times of 5, 10 and 15 h, in a gas mixture containing 20 vol. % H2: 80 vol. % N2 and DC-pulsed plasma nitriding unit. The surface, cross section and the thickness of diffusion of specimens ...

We propose a cross-sectional piecewise constant model for the segmentation of highly curved fiber tracts in diffusion MRI scans. An "anchor curve", obtained via tractography, provides the overall shape of the tract and allows us to examine the tract's microstructure at the level of cross-sectional planes normal to the curve. Each cross-section is modeled as a piecewise constant image, allowing ...

We measure cross-diffusion coefficients in a five-component system, an aerosol OT (AOT) water-in-oil microemulsion loaded with two constituents of the Belousov-Zhabotinsky (BZ) reaction (H(2) O/AOT/BZ1/BZ2/octane). The species BZ1 is either NaBr, an inhibitor of the BZ reaction, or ferroin, a catalyst for the reaction. As species BZ2, we choose Br(2) , an intermediate in the reaction. The cross...

Abstract We prove that, under a suitable rescaling of the integrable kernel defining nonlocal diffusion terms, corresponding sequence solutions Shigesada–Kawasaki–Teramoto cross-diffusion problem converges to solution usual with local diffusion. In particular, result may be regarded as new proof existence for problem.

We deduce a particular case of the population cross-diffusion model introduced by Shigesada et al [31] by using the ideas of mutation and splitting from a single species, as described by Sánchez-Palencia for ODE’s systems [30]. The resulting equations of the PDE system only differ in the cross-diffusion terms, being the corresponding diffusion matrix self-diffusion dominated, which implies that...

Keller-Segel equations are widely employed to explain chemotaxis-induced bacterial traveling band phenomena. In this system, the dispersal of bacteria is modeled by independently given diffusion and advection terms, growth cell population neglected. paper, we develop a chemotaxis model which consists cross-diffusion growth. particular, consider case that terms form an exact cross-diffusion. The...

We obtain the diffusion matrix, D, consisting of the main and cross-diffusion coefficients for a loaded AOT microemulsion, a quaternary system containing water (1)/AOT (2)/species (3)/octane (4). Here "species" is a component of the Belousov-Zhabotinsky reaction: NaBr, NaBrO(3), bathoferroin, ferroin, or Br(2). The main and cross-diffusion coefficients of each species depend crucially on its so...

We consider element diffusion during the linear growth of structure in the intergalactic medium (IGM) before the redshift of reionization. The elements produced during big bang nucleosynthesis (such as D, 4He or 7Li) condensed in collapsing regions more readily than hydrogen. Diffusion was most effective when the IGM was neutral since the collisional cross–section between neutral species is sma...

The process of particle cross-field diffusion in the presence of finite MHD amplitude wave fields is considered using the Monte Carlo particle simulations. We derive the crossfield diffusion coefficient κ⊥ and the parallel diffusion coefficient κ‖ for the flat and the Kolmogorov wave spectra, including the waves propagating oblique to the mean magnetic field B0. We note a substantial difference...