Dispersion models require as input various geometrical parameters to calculate the flow field and dispersion characteristics in the urban environment. As a result of recent advances in digital photogrammetry and remote sensing, databases of the actual 3-D geometry of city centre areas are now increasingly available. In this work we outline a procedure to reduce this large amount of data to a st...

In this paper, we examine the movement of particles within a continuous powder mixer using PEPT (Positron Emission Particle Tracking). The benefit of the approach is that the particle movement along the vessel can be measured non-invasively. The effect of impeller rotation rate, powder flow rate, and powder cohesion on the particle trajectory, dispersive axial transport coefficient, and residen...

This thesis considers infinite constellations in fading channels, without power constraint and with perfect channel state information available at the receiver. Infinite constellations are the framework, proposed by Poltyrev, for analyzing coded modulation codes. The Poltyrev’s capacity, is the highest achievable normalized log density (NLD) of codewords per unit volume, at possibly large block...

Up until a few years ago, the dispersion parameter of Poisson-gamma models has been assumed to be invariant of the characteristics of the observations under study, but recent research in highway safety has shown that the dispersion parameter can potentially be dependent upon the covariates of the model. To account for this dependence, some researchers have reported that the dispersion parameter...

This contribute deals with the use of surface parameters extracted from satellite remote sensing images for the setup of the input dataset required by pollutants atmospheric dispersion models (PATM). These models need 2D distributions (grids) of many surface parameters to model turbulence parameters, as roughness length, albedo, leaf area index and Bowen ratio. Very often these parameters are s...

Generic arguments lead to the idea that quantum gravity has a minimal length scale. A possible observational signal of such scale is photons should exhibit dispersion. In 2009, observation short gamma ray burst seemed push distances smaller than Planck length. This poses challenge for distance models. Here we propose modification position and momentum operators, xˆ pˆ, which scale, but preserve...