83 research outputs found
Un variant clair du Mouflon Corsico-Sarde (Ovis musimon) dû à un allèle au locus B (Brun)
International audienc
Surface tension in the dilute Ising model. The Wulff construction
We study the surface tension and the phenomenon of phase coexistence for the
Ising model on \mathbbm{Z}^d () with ferromagnetic but random
couplings. We prove the convergence in probability (with respect to random
couplings) of surface tension and analyze its large deviations : upper
deviations occur at volume order while lower deviations occur at surface order.
We study the asymptotics of surface tension at low temperatures and relate the
quenched value of surface tension to maximal flows (first passage
times if ). For a broad class of distributions of the couplings we show
that the inequality -- where is the surface
tension under the averaged Gibbs measure -- is strict at low temperatures. We
also describe the phenomenon of phase coexistence in the dilute Ising model and
discuss some of the consequences of the media randomness. All of our results
hold as well for the dilute Potts and random cluster models
Hybridation entre un Mouflon de Corse (Ovis ammon musimon Schreber, 1872) et des brebis de divers génotypes : gènes pour la coloration pigmentaire
Hybridation entre un Mouflon de Corse (Ovis ammon musimon Schreber, 1872) et des brebis de divers génotypes: gènes pour la coloration pigmentaire
International audienc
Hypotrichose congénitale en race bovine normande. I. – Étude descriptive
International audienc
Analyse des liaisons entre la morphologie et l'aptitude au galop au trot et au saut d'obstacles chez le Cheval
Analyse des liaisons entre la morphologie et l'aptitude au galop au trot et au saut d'obstacles chez le Cheval
International audienc
37<sup>th</sup> plenary meeting report of the scientific, technical and economic committee for fisheries (PLEN-11-02)
The Scientific, Technical and Economic Committee for Fisheries hold its 37th plenary on 11-15 July 2011 in Copenhagen (Denmark). The terms of reference included both issues assessments of STECF Expert Working Group reports and additional requests submitted to the STECF by the Commission. Topics dealt with ranged from fisheries economics to management plan evaluation issues
Simple Shared Motifs (SSM) in conserved region of promoters: a new approach to identify co-regulation patterns
<p>Abstract</p> <p>Background</p> <p>Regulation of gene expression plays a pivotal role in cellular functions. However, understanding the dynamics of transcription remains a challenging task. A host of computational approaches have been developed to identify regulatory motifs, mainly based on the recognition of DNA sequences for transcription factor binding sites. Recent integration of additional data from genomic analyses or phylogenetic footprinting has significantly improved these methods.</p> <p>Results</p> <p>Here, we propose a different approach based on the compilation of Simple Shared Motifs (SSM), groups of sequences defined by their length and similarity and present in conserved sequences of gene promoters. We developed an original algorithm to search and count SSM in pairs of genes. An exceptional number of SSM is considered as a common regulatory pattern. The SSM approach is applied to a sample set of genes and validated using functional gene-set enrichment analyses. We demonstrate that the SSM approach selects genes that are over-represented in specific biological categories (Ontology and Pathways) and are enriched in co-expressed genes. Finally we show that genes co-expressed in the same tissue or involved in the same biological pathway have increased SSM values.</p> <p>Conclusions</p> <p>Using unbiased clustering of genes, Simple Shared Motifs analysis constitutes an original contribution to provide a clearer definition of expression networks.</p
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