Search results for "Dame"
showing 10 items of 1466 documents
The parameterized local deduction theorem for quasivarieties of algebras and its application
1996
Let τ be an algebraic type. To each classK of τ-algebras a consequence relation ⊧ K defined on the set of τ-equations is assigned. Some weak forms of the deduction theorem for ⊧ K and their algebraic counterparts are investigated. The (relative) congruence extension property (CEP) and its variants are discussed.CEP is shown to be equivalent to a parameter-free form of the deduction theorem for the consequence ⊧ K .CEP has a strong impact on the structure ofK: for many quasivarietiesK,CEP implies thatK is actually a variety. This phenomenon is thoroughly discussed in Section 5. We also discuss first-order definability of relative principal congruences. This property is equivalent to the fact…
A meshfree method for transverse vibrations of anisotropic plates
2003
A meshfree approach, called displacement boundary method, for anisotropic Kirchhoff plate dynamic analysis is presented. This method is deduced from a variational principle, which uses a modified hybrid functional involving the generalized displacements and generalized tractions on the boundary and the lateral deflection in the domain as independent variables. The discretization process is based on the employment of the fundamental solutions of the static problem operator for the expression of the variables involved in the functional. The stiffness and mass matrices obtained for the dynamic model are frequency-independent, symmetric and positive definite and their computation involves bound…
A Boundary/Interior Element Discretization Method for the Analysis of Two- and Three-Dimensional Elastic-Plastic Structures
1992
A coupled boundary/interior element method is presented for the analysis of elastic-plastic structures with material models endowed of dual internal variables. The domain field modelling is limited to the only plastic strains and strain-like internal variables, represented by their node values at a set of strain points in each interior element. The formulation, based on a Galerkin-type approach, is variationally consistent and leads to a fully symmetric-definite equation system. The backward difference method is adopted for the step-by-step integration procedure, and each step is addressed by an iterative predictor/corrector solution scheme. The analysis method is expected to be most approp…
Les doctorants en sciences humaines sont-ils complexés ?
2008
Article de revue de valorisation; La mise en oeuvre d'une enquête sur la formation doctorale à l'Université de Bourgogne, sous forme de deux questionnaires destinés aux doctorants et aux directeurs de thèse, a permis de mettre en évidence que les habitus et la socialisation professionnelle des doctorants sont très différents selon les champs disciplinaires. Cet article fait un bilan de ces différences
Algorithmic approaches to Siegel's fundamental domain
2017
Siegel determined a fundamental domain using the Minkowski reduction of quadratic forms. He gave all the details concerning this domain for genus 1. It is the determination of the Minkowski fundamental domain presented as the second condition and the maximal height condition, presented as the third condition, which prevents the exact determination of this domain for the general case. The latest results were obtained by Gottschling for the genus 2 in 1959. It has since remained unexplored and poorly understood, in particular the different regions of Minkowski reduction. In order to identify Siegel's fundamental domain for genus 3, we present some results concerning the third condition of thi…
La distribuzione dell'attività proteasica nella blastula e nella giovane gastrula diDiscoglossus pictus
1956
Summary Protease activity has been measured in the animal and vegetal half of the blastula and in the dorsal and ventral regions of the early gastrula of Discoglossus pictus. A higher protease activity was found in the dorsal region of the early gastrula, where presumptive chordamesoderm and presumptive neuroectoderm are localized.
The Existence of Nitrate Radicals in Irradiated TiO 2 Aqueous Suspensions in the Presence of Nitrate Ions
2018
Evidence of the existence of nitrate radical in irradiated aqueous TiO2 suspensions in the presence of nitrate ions are reported for the first time. The joint use of UV/Vis and EPR spectroscopy showed that nitrate radicals are formed by hole induced oxidation of nitrate ions. Photocatalytic degradation of a model alkene compound allowed to highlight the presence of an intermediate organic nitrate deriving from nitrate radical attack to the double bond of the substrate. These results not only allow deeper understanding of photocatalytic processes, but open the route to new green photocatalytic syntheses initiated by nitrate radicals and to new insights in the field of atmospheric chemistry.
Per una Carta de Drets Socials com a procés de construcció de la ciutadania social comunitària
2012
The public system of Social Services is suffering an unprecedented government attack, using the global crisis as an excuse. Their plan is to ruin the social achievements that are the foundations of our Democracy, just when the social inequality is so blatant. Therefore, we would like to do our bit by proposing the implementation of a new process that contributes to strengthen the Community participation.
Taxe d'inhabitation
2000
International audience
Contribution à l'étude des évolutions contemporaines du droit constitutionnel français
2016
Classiquement consacré à l’étude des institutions politiques, le droit constitutionnel s’est enrichi de l’étude du système normatif, notamment dans ses liens avec les systèmes juridiques régionaux et internationaux, et de la protection des droits et libertés fondamentaux. Les travaux de recherche présentés dans ce mémoire ne portent pas sur l’étude des institutions politiques mais intéressent en revanche les deux autres domaines du droit constitutionnel.S’agissant de l’étude du système normatif, il apparaît qu’il s’ajuste progressivement pour mieux intégrer les contraintes liées au développement du droit international en général et du droit de l’Union européenne et de la Convention européen…