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Les réseaux WiFi font maintenant partie de la vie
quotidienne, que ce soit à la maison, dans les lieux publics ou encore au
travail. Ces réseaux ont l'avantage d'être très souvent gratuits et faciles
d'utilisation. Depuis le milieu des années 90 jusqu'à maintenant, les réseaux
WiFi ont fortement évolué permettant une augmentation très significative ...
Plus de 40% de l’énergie totale consommée en
France provient des habitations. La plupart des recherches dans le domaine du
bâtiment se concentrent sur leur efficacité énergétique mais prennent peu en
compte le comportant des utilisateurs qui est une part de plus en plus
importante de cette consommation. Je présenterais nos premiers résultats dans
le ...
De
nombreux systèmes informatiques (centre de calculs, réseaux) sont composées
d'un grand nombre d'ordinateurs qui interagissent. La conception d’algorithmes
efficaces pour de tels systèmes passe par la création de modèles capables de
prédire leurs performances. Un des défis est la compréhension des phénomènes
aléatoires, par exemple liés à des pannes ou à des événements extérieurs.
Dans ...
Mathematicians have always been prone to
error. As proofs get longer and more complicated, the question of
correctness looms ever larger. Andrew Wiles’ proof of Fermat’s last
theorem contained a flaw that was only fixed a year later. Meanwhile,
proof assistants — formal tools originally developed in order to verify ...
Last week we studied genes and proteins and so how genes, portions of DNA, are translated into proteins.We also saw the very fast evolutionof the sequencing technology which allows for producing large genomic texts, it is now possible to sequence a whole genome. But it is just thebeginning of the story. The challenge to ...
Based on the principle we statedin the last session, we will now write in pseudo code a firstalgorithm for locating genes on a bacterial genome. Remember first how this algorithm should work, we first need to find two consecutive stop triplets in the same phase, same phase meansthe number of letters between these two ...
We have written an algorithm for finding genes. But you remember that we arestill to write the two functions for finding the next stop codonand the next start codon. Let's see how we can do that. We are looking for triplets. We use the term triplets as long as wehave no proof that they ...
We have written an algorithm whichis able to locate potential genes on a sequence but only on one phase because we are looking triplets after triplets. Now remember that the genes maybe located on different phases and on the two strands. It means that to retrieve all the genes on a genome we have ...
We have got a bacterial gene predictor but the way this predictor works is rather crude and if we want to have more reliable results, we have to inject into this algorithmmore biological knowledge. We will use a notion of RBS, RBS stands for Ribosome Binding Sites. What is it? OK. Let's have ...
We have seen how we can make gene predictions more reliable through searching for all the patterns,all the occurrences of patterns. We have seen, for example, howif we locate the RBS, Ribosome Binding Site, upstream gene we can make the prediction of the coding sequence more reliable. So it is clear that pattern searching ...
