## Search

Now showing items 31-40 of 62

#### Crossover from anomalous to normal diffusion: truncated power-law noise correlations and applications to dynamics in lipid bilayers

(2018-10-18)

The emerging diffusive dynamics in many complex systems shows a
characteristic crossover behaviour from anomalous to normal diffusion which
is otherwise fitted by two independent power-laws. A prominent example for
a ...

#### Langevin equation in complex media and anomalous diffusion

(2018-07-30)

The problem of biological motion is a very intriguing and topical issue.
Many efforts are being focused on the development of novel modelling
approaches for the description of anomalous diffusion in biological systems,
such ...

#### The role of the environment in front propagation

(2018-07-09)

In this work we study the role of a complex environment in the propagation of a front
with curvature-dependent speed. The motion of the front is split into a drifting part and
a fluctuating part. The drifting part is ...

#### Quasi-probability Approach for Modelling Local Extinction and Counter-gradient in Turbulent Premixed Combustion

(2018-05-23)

In opposition to standard probability distributions, quasi-probability distributions
can have negative values which highlight nonclassical properties of the
corresponding system. In quantum mechanics, such negative values ...

#### Modeling of birth-death and diffusion processes in biological complex environments

(2018-04-20)

This thesis is centered on the theory of stochastic processes and their applications in biological systems characterized by a complex environment. Three case studies have been modeled by the use of the three fundamental ...

#### Effective self-similar expansion for the Gross-Pitaevskii equation

(2018-04)

We consider an effective scaling approach for the free expansion of a one-dimensional quantum wave packet, consisting in a self-similar evolution to be satisfied on average, i.e., by integrating over the coordinates. A ...

#### Random diffusivity from stochastic equations: comparison of two models for Brownian yet non-Gaussian diffusion

(2018-04)

A considerable number of systems have recently been reported in which Brownian yet non-Gaussian dynamics was observed. These are processes characterised by a linear growth in time of the mean squared displacement, yet the ...

#### Concurent multi-scale physical parametrization of fire-spotting: A study on the role of macro- and meso-scale characteristics of the system

(2018)

The strong impact of wildfires in terms of lives and homes lost and of damage to ecosystems, calls
for an urgent improvement in the risk management. The aim of the present research is the
improvement of these software ...

#### Wildfire propagation modelling

(2018)

Wildfires are a concrete problem with a strong impact on human life, property and the environment, because
they cause disruption and are an important source of pollutants. Climate change and ...

#### Wildland fire propagation modelling

(2017-12)

Wildfire propagation modelling is a challenging problem due to its complex
multi-scale multi-physics nature. This process can be described by a reaction-
diffusion equation based on the energy balance principle. Alternative ...