Search results for "tilings"
showing 3 items of 3 documents
Laminations and tilings of the Hyperbolic upper half plane
2005
This thesis is devoted to the study of dynamical systems associated with tilings of theEuclidean plane or of the Hyperbolic half-plane. A such tiling codes an action of a group ofisometries (namely the group of translations of the plane or the group of affine maps) on a compactmetric space $\Omega$ such that the properties of this action are related with the combinatoricproperties of the tiling. The behaviors of the actions obtained by this way are really various. Insome cases, like for example for the Penrose's tiling, this action is free and minimal. This givesto the set $\Omega$ a structure of a specific lamination called {\it solenoid}. This space islocally the product of a Cantor set w…
Functional genomic analysis of the response to hypoxic and oxidative stress in Candida albicans
2017
Candida albicans es el patógeno humano más prevalente. A pesar de ser un organismo comensal, también es un hongo oportunista que puede causar infecciones de seria gravedad en personas inmunodeprimidas. Aunque los principales factores de virulencia han sido caracterizados, el proceso exacto de patogénesis en Candida todavía se desconoce. Los mecanismos de adaptación a los distintos ambientes a los que se enfrenta durante la invasión del cuerpo humano todavía no están suficientemente caracterizados. En este trabajo se usaron análisis genómicos funcionales para el estudio de la respuesta global de C. albicans a dos estreses que encuentra durante la invasión del cuerpo humano: estrés oxidativo …
Counting Berg partitions via Sturmian words and substitution tilings
2013
We develop the connection of Berg partitions with special substitution tilings of two tiles. We obtain a new proof that the number of Berg partitions with a fixed connectivity matrix is equal to half of the sum of its entries, [12]. This approach together with the formula of Seebold [10], for the number of substitutions preserving a given Sturmian sequence, shows that all of the combinatorial substitutions can be realized geometrically as Berg partitions. We treat Sturmian tilings as intersection tilings of bi-partitions. Using the symmetries of bi-partitions we obtain geometrically the palindromic properties of Sturmian sequences (Theorem 3) established combinatorially by de Luca and Migno…