Plans de chutes

Hydraulics of stepped chutes: The transition flow L’hydraulique des chutes en marches d’escalier: L’écoulement de transition

Stepped spillway flows may behave as a succession of free-falling nappes at low flows and as a skimming flow at large discharges. However there is a range of intermediate flow rates characterised by a chaotic flow motion associated with intense splashing: i.e. the transition flow regime. Detailed air–water flow properties in transition flows were measured in two large experimental facilities. T...

Mesure de la fragilité et détection de chutes pour le maintien à domicile des personnes âgées

Population ageing is a major issue for society in the next years, especially because of theincrease of dependent people. The limits in specialized institutes capacity and the wish of theelderly to stay at home as long as possible explain a growing need for new specific at home services.Technologies can help securing the person at home by detecting falls. They can also help in th...

Optimisation de plans de financement immobiliers

PLAGRAM : un algorithme de fouille de graphes plans efficace

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Chutes and Ladders in Markov Chains

We investigate how the stationary distribution of a Markov chain changes when transitions from a single state are modified. In particular, adding a single directed edge to nearest neighbor random walk on a finite discrete torus in dimensions one, two, or three changes the stationary distribution linearly, logarithmically, or only locally. Related results are derived for birth and death chains a...