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Université de Fribourg

CPG graphs : Some Structural and Hardness Results

Champseix, Nicolas ; Galby, Esther ; Munaro, Andrea ; Ries, Bernard

In: Discrete Applied Mathematics, 2021, vol. 290, p. 17-35

In this paper we continue the systematic study of Contact graphs of Paths on a Grid (CPG graphs) initiated in Deniz et al. (2018). A CPG graph is a graph for which there exists a collection of pairwise interiorly disjoint paths on a grid in one-to-one correspondence with its vertex set such that two vertices are adjacent if and only if the corresponding paths touch at a grid-point. If every...

Université de Fribourg

Understanding uncertainty in the Impact Classification for Alien Taxa (ICAT) assessments

Probert, Anna F. ; Volery, Lara ; Kumschick, Sabrina ; Vimercati, Giovanni ; Bacher, Sven

In: NeoBiota, 2020, vol. 62, p. 387–405

The Environmental Impact Classification for Alien Taxa (EICAT) and the Socio- Economic Impact Classification of Alien Taxa (SEICAT) have been proposed to provide unified methods for classifying alien species according to their magnitude of impacts. EICAT and SEICAT (herein “ICAT” when refered together) were designed to facilitate the comparison between taxa and invasion contexts by using a...

Université de Fribourg

Seismic monitoring in the Gugla rock glacier (Switzerland): ambient noise correlation, microseismicity and modelling

Guillemot, Antoine ; Helmstetter, Agnès ; Larose, Éric ; Baillet, Laurent ; Garambois, Stéphane ; Mayoraz, Raphaël ; Delaloye, Reynald

In: Geophysical Journal International, 2020, vol. 221, no. 3, p. 1719–1735

A network of seismometers has been installed on the Gugla rock glacier since October 2015 to estimate seismic velocity changes and detect microseismicity. These two processes are related to mechanical and structural variations occurring within the rock glacier. Seismic monitoring thus allows a better understanding of the dynamics of rock glaciers throughout the year. We observed seasonal...