The connective constant μ(G) of a quasi-transitive graph G is the asymptotic growth rate of the number of selfavoiding walks (SAWs) on G from a given starting vertex. We survey several aspects of the relationship between the connective constant and the underlying graph G. • We present upper and lower bounds for μ in terms of the vertex-degree and girth of a transitive graph. • We discuss the qu...

Vegetation provides important functions and services in urban areas, and vegetation heights divided into vertical and horizontal units can be used as indicators for its assessment. Conversely, detailed area-wide and updated height information is frequently missing for most urban areas. This study sought to assess three vegetation height classes from a globally available TanDEM-X digital elevati...

We define and study here the class of rational functions that are finite union of sequential functions. These functions can be realized by cascades of sequential transducers. After showing that cascades of any height are equivalent to cascades of height at most two and that this class strictly contains sequential functions and is strictly contained in the class of rational functions, we prove t...

Abstract. The Delft3D hydrodynamic and wave model is used to hindcast the storm surge waves that impacted La Rochelle, France, surrounding area (Aytré, Châtelaillon-Plage, Yves, Fouras, Île de Ré) during Xynthia. These models are validated against tide measurements. then estimate footprint of flow depth, speed, unit discharge, momentum flux, significant height, energy total water depth (flow pl...

A two-layer shallow-water model with R15 truncation and topographic forcing is used to study intraseasonal variability in the Northern Hemisphere's (NH) extratropical atmosphere. The model's variability is dominated by oscillations with average periods near 65-70 and 40-50 days. These periods are also found in 13.5 years of daily upper-air data from January 1980 to July 1993. The spatial variab...