Molecular dynamics simulations on devitrification: the PbF2 case

In this work molecular dynamics simulations were performed to reproduce the kinetic and thermodynamic transformations occurring during melt crystallization, vitrification, and glass crystallization (devitrification) of PbF2. Two potential parameters were analyzed in order to access the possibility of modeling these properties. These interionic potentials are models developed to describe specific characteristic of PbF2, and thermodynamic properties were well reproduced by one of them, while the other proved well adapted to simulate the crystalline structure of this fluoride. By a modeled nonisothermal heat treatment of the glass, it was shown that the devitrification of a cubic structure in which the Pb-Pb distances are in good agreement with theory and experiment. (C) 2002 American Institute of Physics.

Alignment of the CMS tracker with LHC and cosmic ray data

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Description and performance of track and primary-vertex reconstruction with the CMS tracker

A description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the positions of the LHC luminous region and individual primary-interaction vertices. Despite the very hostile environment at the LHC, the performance obtained with these algorithms is found to be excellent. For t (t) over bar events under typical 2011 pileup conditions, the average track-reconstruction efficiency for promptly-produced charged particles with transverse momenta of p(T) > 0.9GeV is 94% for pseudorapidities of vertical bar eta vertical bar < 0.9 and 85% for 0.9 < vertical bar eta vertical bar < 2.5. The inefficiency is caused mainly by hadrons that undergo nuclear interactions in the tracker material. For isolated muons, the corresponding efficiencies are essentially 100%. For isolated muons of p(T) = 100GeV emitted at vertical bar eta vertical bar < 1.4, the resolutions are approximately 2.8% in p(T), and respectively, 10 m m and 30 mu m in the transverse and longitudinal impact parameters. The position resolution achieved for reconstructed primary vertices that correspond to interesting pp collisions is 10-12 mu m in each of the three spatial dimensions. The tracking and vertexing software is fast and flexible, and easily adaptable to other functions, such as fast tracking for the trigger, or dedicated tracking for electrons that takes into account bremsstrahlung.

Observation of the rare B-s(0)->mu(+)mu(-) decay from the combined analysis of CMS and LHCb data

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Traité de matériaux manuscrits de divers genres d'histoire,

Mode of access: Internet.

Histoire des français des divers etats ou histoire de france aux cinq derniers siecles.

Mode of access: Internet.

Histoire des français des divers etats ou histoire de france aux cinq derniers siecles.

Mode of access: Internet.

Histoire des français des divers etats ou histoire de france aux cinq derniers siecles.

Mode of access: Internet.

Histoire des français des divers etats ou histoire de france aux cinq derniers siecles.

Mode of access: Internet.

Histoire des français des divers etats ou histoire de france aux cinq derniers siecles.

Mode of access: Internet.

Lettres choisies de Mmes. De Sévigné, de Grignan, de Simiane, et de Maintenon : précédées des réflexions de m. l'abbé de Vauxcelles, et accompagnés des notes historiques de M. Grouvelle.

Spine title: Lettres de Sévigné.

Nouveau choix des lettres de Madame de Sévigné : spécialement destiné aux petits séminaires et aux pensionnats de demoiselles /

On spine: Choix des lettres de Mme de Sévigné.