Search results for "Clos"
showing 10 items of 1439 documents
Topological properties of cellular automata on trees
2012
We prove that there do not exist positively expansive cellular automata defined on the full k-ary tree shift (for k>=2). Moreover, we investigate some topological properties of these automata and their relationships, namely permutivity, surjectivity, preinjectivity, right-closingness and openness.
A Symplectic Kovacic's Algorithm in Dimension 4
2018
Let $L$ be a $4$th order differential operator with coefficients in $\mathbb{K}(z)$, with $\mathbb{K}$ a computable algebraically closed field. The operator $L$ is called symplectic when up to rational gauge transformation, the fundamental matrix of solutions $X$ satisfies $X^t J X=J$ where $J$ is the standard symplectic matrix. It is called projectively symplectic when it is projectively equivalent to a symplectic operator. We design an algorithm to test if $L$ is projectively symplectic. Furthermore, based on Kovacic's algorithm, we design an algorithm that computes Liouvillian solutions of projectively symplectic operators of order $4$. Moreover, using Klein's Theorem, algebraic solution…
Variable Length Markov Chains, Persistent Random Walks: a close encounter
2020
This is the story of the encounter between two worlds: the world of random walks and the world of Variable Length Markov Chains (VLMC). The meeting point turns around the semi-Markov property of underlying processes.
The Influence of the feedback control of the hexapod platform of the SAAM dynamic driving simulator on neuromuscular dynamics of the drivers
2012
Multi sensorial cues (visual, auditory, haptic, inertial, vestibular, neuromuscular) [Ang2] play important roles to represent a proper sensation (objectively) and so a perception (subjectively as cognition) in driving simulators. Driving simulator aims at giving the sensation of driving as in a real case. For a similar situation, the driver has to react in the same way as in reality in terms of ‘self motion’. To enable this behavior, the driving simulator must enhance the virtual immersion of the subject in the driving situation. The subject has to perceive the motion of his own body in the virtual scene of the virtual car as he will have in a real car. For that reason, restituting the iner…
On the radiative impact of aerosols on photolysis rates: comparison of simulations and observations in the Lampedusa island during the ChArMEx/ADRIME…
2016
The Mediterranean basin is characterized by large concentrations of aerosols from both natural and anthropogenic sources. These aerosols affect tropospheric photochemistry by modulating the photolytic rates. Three simulations of the atmospheric composition at basin scale have been performed with the CHIMERE chemistry-transport model for the period from 6 June to 15 July 2013 covered by the ADRIMED campaign, a campaign of intense measurements in the western Mediterranean basin. One simulation takes into account the radiative effect of the aerosols on photochemistry, the second one does not, and the third one is designed to quantify the model sensitivity to a bias in the ozone column. These s…
Étude paléoenvironnementale et paléoclimatique multi-proxies des bassins fini-carbonifères à permiens du N-E du Massif central.
2021
International audience
From Neolithic to Iron age in Les Mureaux (Yvelines, France)
2018
De l’enclos laténien au sanctuaire julio-claudien : Apollon Moritasgus à Alésia, hiatus et superpositions
2019
International audience
Neolithic enclosures with pseudo-ditches
2020
The recent discovery of seven Neolithic sites in the Alsace Plain with “Rosheim” enclosures has renewed the interpretation of these extensive complexes dated to the 5th millennium BC. This very particular type of enclosure, whose eponymous site is located about twenty kilometres from Strasbourg, is made up of discontinuous ditches, following a pre-established layout, which are progressively filled in. New analysis of these monuments is accompanied by a reflection on their function (ceremonial or defensive), enabling us to provide a coherent account of the origin and important geographical extension of these enclosures, which are found in numerous cultural groups over more than two millennia…
Ruitz (Pas-de-Calais) : la zone d'activité intercommunale de Ruitz, tranche 1 : rapport de diagnostic
2010
Cette nouvelle phase de sondages menée sur la zone d'activité de Ruitz et des communes limitrophes a été l'occasion de reconna\ⁱtre sur une surface de 33 hectares, deux importantes occupations datées de La Tène moyenne au milieu du IIe s. de notre ère. Elles complétent ainsi nos connaissances sur l'occupation du territoire et l'organisation du monde rural à la fin du second âge du Fer et au début de la période gallo-romaine. La période laténienne est caractérisée par un enclos quadrangulaire. Il enferme sur une surface minimum de 2500 m² des structures à vocation domestique, de stockage. La présence de fossés à l'intérieur de l'enclos indique un possible cloisonnement de l'espace et une sub…