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Reaction-Transport Systems - Mesoscopic Foundations, Fronts, and Spatial Instabilities (Hardcover, Edition.): Vicenc Mendez,... Reaction-Transport Systems - Mesoscopic Foundations, Fronts, and Spatial Instabilities (Hardcover, Edition.)
Vicenc Mendez, Sergei Fedotov, Werner Horsthemke
R2,957 Discovery Miles 29 570 Ships in 10 - 15 working days

This book is an introduction to the dynamics of reaction-diffusion systems, with a focus on fronts and stationary spatial patterns. Emphasis is on systems that are non-standard in the sense that either the transport is not simply classical diffusion (Brownian motion) or the system is not homogeneous. A important feature is the derivation of the basic phenomenological equations from the mesoscopic system properties. Topics addressed include transport with inertia, described by persistent random walks and hyperbolic reaction-transport equations and transport by anomalous diffusion, in particular subdiffusion, where the mean square displacement grows sublinearly with time. In particular reaction-diffusion systems are studied where the medium is in turn either spatially inhomogeneous, compositionally heterogeneous or spatially discrete. Applications span a vast range of interdisciplinary fields and the systems considered can be as different as human or animal groups migrating under external influences, population ecology and evolution, complex chemical reactions, or networks of biological cells. Several chapters treat these applications in detail.

Fractional Dynamics In Comb-like Structures (Hardcover): Alexander Iomin, Vicenc Mendez, Werner Horsthemke Fractional Dynamics In Comb-like Structures (Hardcover)
Alexander Iomin, Vicenc Mendez, Werner Horsthemke
R2,566 Discovery Miles 25 660 Ships in 10 - 15 working days

Random walks often provide the underlying mesoscopic mechanism for transport phenomena in physics, chemistry and biology. In particular, anomalous transport in branched structures has attracted considerable attention. Combs are simple caricatures of various types of natural branched structures that belong to the category of loopless graphs. The comb model was introduced to understand anomalous transport in percolation clusters. Comb-like models have been widely adopted to describe kinetic processes in various experimental applications in medical physics and biophysics, chemistry of polymers, semiconductors, and many other interdisciplinary applications.The authors present a random walk description of the transport in specific comb geometries, ranging from simple random walks on comb structures, which provide a geometrical explanation of anomalous diffusion, to more complex types of random walks, such as non-Markovian continuous-time random walks. The simplicity of comb models allows to perform a rigorous analysis and to obtain exact analytical results for various types of random walks and reaction-transport processes.

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