Search results for "Clos"
showing 10 items of 1439 documents
Brownian dynamics of polydisperse colloidal hard spheres: Equilibrium structures and random close packings
1994
Recently we presented a new technique for numerical simulations of colloidal hard-sphere systems and showed its high efficiency. Here, we extend our calculations to the treatment of both 2- and 3-dimensional monodisperse and 3-dimensional polydisperse systems (with sampled finite Gaussian size distribution of particle radii), focusing on equilibrium pair distribution functions and structure factors as well as volume fractions of random close packing (RCP). The latter were determined using in principle the same technique as Woodcock or Stillinger had used. Results for the monodisperse 3-dimensional system show very good agreement compared to both pair distribution and structure factor predic…
The Kuratowski convergence and connected components
2012
International audience; We investigate the Kuratowski convergence of the connected components of the sections of a definable set applying the result obtained to semialgebraic approximation of subanalytic sets. We are led to some considerations concerning the connectedness of the limit set in general. We discuss also the behaviour of the dimension of converging sections and prove some general facts about the Kuratowski convergence in tame geometry.
Polybe et Montesquieu : aspects d’une réflexion sur le pouvoir 1
2012
Dans la préparation à l’Esprit des Lois que sont les Considérations sur les causes de la grandeur des Romains et de leur décadence, Montesquieu se réfère, entre autres sources, aux Histoires de Polybe. Si les deux auteurs ont des méthodes différentes pour établir les faits, ni l’un ni l’autre ne proposent cependant à leur lecteur une simple relation de l’histoire de Rome : Polybe veut que ses Histoires forment les responsables politiques et les Considérations sont, selon d’Alembert, une “ histoire romaine à l’usage des hommes d’État et des philosophes ”. Tous deux conduisent donc, à partir de l’exemple romain, une réflexion plus large sur la nature du pouvoir, les conditions de sa conquête …
High Precision Astrometry Over Large Angular Scales with Closure Constraints: The Triplet 1803+784/1928+738/2007+777
1996
The technique of differential astrometry using the phase-delay VLBI observable promises fractional precisions of ~2 × 10−9 in the determination of the separation of sources 5° or 6° apart on the sky (Guirado et al. 1995a; Lara et al. 1996). In our present research we seek further improvement in this technique through using triplets of radio sources, which provide a closure constraint in the determination of relative angular positions. This constraint not only eases the resolution of the phase-cycle ambiguities (a major problem in the least-squares approach to astrometry with phase delays), but it also strongly constrains the space of allowable parameter values.
"La pura superficie" e la traslazione
2018
The article is a reading of the collected poems by Guido Mazzoni "La pura superficie" (Donzelli 2017)
Risk Disclosure in the European Banking Industry: Qualitative and Quantitative Content Analysis Methodologies
2022
This book aims to shed light on the advantages and disadvantages of both qualitative and quantitative content analysis methodologies by examining risk disclosure practices in the European banking industry. Content analysis methodologies allow to assess the level of transparency of financial and non-financial reports by focusing on the information disclosed to the public with reference to their risk exposure and management. There is an ongoing debate in the literature to understand whether qualitative or quantitative content analysis methodologies are more effective and useful to analyse disclosure practices. Some authors contend that qualitative methodologies may be more appropriate because…
I diritti dei consumatori dopo la Direttiva 2011/83/UE
2013
Il saggio offre una disamina critica dei contenuti della Direttiva 2011/83/UE, anche in rapporto agli obiettivi annunciati nella Proposta ( e poi abbandonati), soffermandosi particolarmente sulle regole in tema di obblighi di informazione al consumatore.Alla luce di queste regole, la nuova Direttiva si rivela quale ulteriore significativa conferma della scelta che affida l'obiettivo della trasparenza contrattuale a rigide prescrizioni di forma e contenuto dell'informazione, lungo un processo che qui viene definito di "standardizzazione" delle condotte del professionista. L'obiettivo di disclosure viene affidato non a tecniche di controllo e verifica del concreto livello di informazione offe…
Robust fault tolerant tracking controller design for a VTOL aircraft
2013
This paper deals with the fault tolerant control (FTC) design for a Vertical Takeoff and Landing (VTOL) aircraft subject to external disturbances and actuator faults. The aim is to synthesize a fault tolerant controller ensuring trajectory tracking for the nonlinear uncertain system represented by a Takagi-Sugeno (T-S) model. In order to design the FTC law, a proportional integral observer (PIO) is adopted which estimate both of the faults and the faulty system states. Based on the Lyapunov theory and ℓ2 optimization, the trajectory tracking performance and the stability of the closed loop system are analyzed. Sufficient conditions are obtained in terms of linear matrix inequalities (LMI). …
Monotonicity and enclosure methods for the p-Laplace equation
2018
We show that the convex hull of a monotone perturbation of a homogeneous background conductivity in the $p$-conductivity equation is determined by knowledge of the nonlinear Dirichlet-Neumann operator. We give two independent proofs, one of which is based on the monotonicity method and the other on the enclosure method. Our results are constructive and require no jump or smoothness properties on the conductivity perturbation or its support.
Enclosure method for the p-Laplace equation
2014
We study the enclosure method for the p-Calder\'on problem, which is a nonlinear generalization of the inverse conductivity problem due to Calder\'on that involves the p-Laplace equation. The method allows one to reconstruct the convex hull of an inclusion in the nonlinear model by using exponentially growing solutions introduced by Wolff. We justify this method for the penetrable obstacle case, where the inclusion is modelled as a jump in the conductivity. The result is based on a monotonicity inequality and the properties of the Wolff solutions.