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Search Results: 1 - 10 of 461891 matches for " A. Sarti "
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Semileptonic B Decays in Babar
A. Sarti
Physics , 2004,
Abstract: BaBar measurements involving semileptonic decays of B mesons are reviewed. Attention is focused on the extraction of |Vub| and |Vcb| elements of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. Recent results of inclusive and exclusive approaches are presented.
B Physics at LHC
A. Sarti
Physics , 2008,
Abstract: Three experiments, among the LHC project, are getting ready to explore the b quark flavour sector. While ATLAS and CMS are general purpose experiments, where the study of B mesons is going to proceed in parallel with the Higgs boson and supersymmetry searches, the LHCb experiment is devoted to B physics studies. The key parameters entering the physics analyses and the performances achieved in all the three experiments are presented. Given the large B physics program foreseen in the LHC experiments, the studies reported in this paper have been selected as those with higher likelihood to provide solid and interesting new results on Standard Model validation and New Physics processes search with early data.
LHCb Level-0 Trigger Detectors
A. Sarti
Physics , 2007, DOI: 10.1016/j.nima.2006.10.168
Abstract: The calorimeter and muon systems are essential components to provide a trigger for the LHCb experiment. The calorimeter system comprises a scintillating pad detector and pre-shower, followed by electromagnetic and hadronic calorimeters. The calorimeter system allows photons, electrons and hadrons to be identified, and their energy to be measured. The muon system consists of five measuring stations equipped with Multi-Wire Proportional Chambers (MWPCs) and triple-Gas Electron Multiplier (GEM) detectors, separated by iron filters. It allows the muons identification and transverse momentum measurement. The status of the two systems and their expected performance is presented.
|Vub| Measurements at B-Factories
A. Sarti
Physics , 2003,
Abstract: The determination of the Vub element of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix plays a central role in testing the Standard Model (SM) interpretation of CP violation. Measurements at B-Factories are contributing with results that rely on different theoretical assumptions. Recent inclusive and exclusive results from CLEO, BaBar and BELLE are reviewed.
A dor, o indivíduo e a cultura
Sarti, Cynthia A.;
Saúde e Sociedade , 2001, DOI: 10.1590/S0104-12902001000100002
Abstract: in the pain, the relation between the individual and society appears clearly. the way in which pain is felt and expressed is ruled by cultural codes and pain itself is constituted, as a human fact, by the meanings given to it by society, that sanctions the ways to demonstrate feelings. although pain is a singular experience for the one who feels it, it happens within a symbolic system, making it a cultural fact.
ACTA MATHEMATICA UNIVERSITATIS COMENIANAE
A. SARTI and G. CITTI
ACTA MATHEMATICA UNIVERSITATIS COMENIANAE , 2001,
Abstract: . A geometric model for segmentation of images with missing boundaries is presented. Some classical problems of boundary completion in cognitive images, like the pop up of subjective contours in the famous triangle of Kanizsa, are faced from a surface evolution point of view. The method is based on the mean curvature evolution of a graph with respect to the Riemannian metric induced by the image. Existence, uniqueness and maximum principle of the parabolic partial differential equation are proved. A numerical scheme introduced by Osher and Sethian for evolution of fronts by curvature motion is adopted. Results are presented both for modal completion of cognitive objects and segmentation of medical images with missing boundaries.
On varieties which are uniruled by lines
A. L. Knutsen,C. Novelli,A. Sarti
Mathematics , 2005,
Abstract: Using the $\sharp$-minimal model program of uniruled varieties we show that for any pair $(X, \H)$ consisting of a reduced and irreducible variety $X$ of dimension $k \geq 3$ and a globally generated big line bundle $\H$ on $X$ with $d:= \H^k$ and $n:= h^0(X, \H)-1$ such that $d<2(n-k)-4$, then $X$ is uniruled of $\H$-degree one, except if $(k,d,n)=(3,27,19)$ and a ${\sharp}$-minimal model of $(X, \H)$ is $(\PP^3,\O_{\PP^3}(3))$. We also show that the bound is optimal for threefolds.
Evaluation of a mechanistic mathematical model of a packed-bed anaerobic reactor treating wastewater
Sarti,A.; Foresti,E.; Zaiat,M.;
Latin American applied research , 2004,
Abstract: a mechanistic mathematical model is proposed and evaluated for simulating the performance of a bench-scale packed-bed anaerobic reactor that uses polyurethane foam as biomass support. the model developed under rational criteria was based on the study of mass transfer and biochemical kinetics, also considering the hydrodynamic characteristics of the reactor. the data generated by the model adhered well to the experimental data obtained from the operation of the reactor applied to the treatment of a glucosebased substrate. the liquid-phase mass transfer coefficient was found to be the main parameter in the model, and its precise estimation is essential for the model to be successfully applied. additionally, a case study was used in order to verify the applicability of the model for designing full-scale reactors. the simulations performed permitted to demonstrate the importance of the choice of convenient liquid superficial velocity and polyurethane foam matrix size which have direct influence on the solid- and liquid-phase mass transfers resistance and, consequently on the volume of the designed reactor.
Evaluation of a mechanistic mathematical model of a packed-bed anaerobic reactor treating wastewater
A. Sarti,E. Foresti,M. Zaiat
Latin American applied research , 2004,
Abstract: A mechanistic mathematical model is proposed and evaluated for simulating the performance of a bench-scale packed-bed anaerobic reactor that uses polyurethane foam as biomass support. The model developed under rational criteria was based on the study of mass transfer and biochemical kinetics, also considering the hydrodynamic characteristics of the reactor. The data generated by the model adhered well to the experimental data obtained from the operation of the reactor applied to the treatment of a glucosebased substrate. The liquid-phase mass transfer coefficient was found to be the main parameter in the model, and its precise estimation is essential for the model to be successfully applied. Additionally, a case study was used in order to verify the applicability of the model for designing full-scale reactors. The simulations performed permitted to demonstrate the importance of the choice of convenient liquid superficial velocity and polyurethane foam matrix size which have direct influence on the solid- and liquid-phase mass transfers resistance and, consequently on the volume of the designed reactor.
Two-Dimensional Beam Tracing from Visibility Diagrams for Real-Time Acoustic Rendering
F. Antonacci,A. Sarti,S. Tubaro
EURASIP Journal on Advances in Signal Processing , 2010, DOI: 10.1155/2010/642316
Abstract:
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