Effect of continuum couplings in fusion of halo 11^{11}Be on 208^{208}Pb around the Coulomb barrier

The effect of continuum couplings in the fusion of the halo nucleus $^{11}$Be on $^{208}$Pb around the Coulomb barrier is studied using a three-body model within a coupled discretised continuum channels (CDCC) formalism. We investigate in particular the role of continuum-continuum couplings. These are found to hinder total, complete and incomplete fusion processes. Couplings to the projectile $1p_{1/2}$ bound excited state redistribute the complete and incomplete fusion cross sections, but the total fusion cross section remains nearly constant. Results show that continuum-continuum couplings enhance the irreversibility of breakup and reduce the flux that penetrates the Coulomb barrier. Converged total fusion cross sections agree with the experimental ones for energies around the Coulomb barrier, but underestimate those for energies well above the Coulomb barrier.Comment: 15 pages, 7 figures, accepted in Phys. Rev.

Projectile breakup dynamics for 6^{6}Li + 59^{59}Co: kinematical analysis of α\alpha-dd coincidences

A study of the kinematics of the $\alpha$-$d$ coincidences in the $^{6}$Li + $^{59}$Co system at a bombarding energy of $E_{lab} = 29.6$ MeV is presented. With exclusive measurements performed over different angular intervals it is possible to identify the respective contributions of the sequential projectile breakup and direct projectile breakup components. A careful analysis using a semiclassical approach of these processes provides information on both their lifetime and their distance of occurrence with respect to the target. Breakup to the low-lying (near-threshold) continuum is delayed, and happens at large internuclear distances. This suggests that the influence of the projectile breakup on the complete fusion process can be related essentially to direct breakup to the $^6$Li high-lying continuum spectrum. %Comment: Revised version including new Fig.3 and Fig.4 with new CDCC calculations. Accepted for publication at Eur. Phys. Jour. A. 11 pages, 6 figure

Localismo, spirito cooperativo ed efficienza: elementi per un'analisi economica delle banche di credito cooperativo

Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

L'analisi discriminante per la previsione delle crisi delle "micro-banche"

Published December 1995Consiglio Nazionale delle Ricerche (CNR). Biblioteca Centrale / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Herd-level predictive values and sensitivity of mastitis base on individual-animal mastitis characteristics and sample size.

Our objective was to build a simulation model to illustrate the difficulties in interpreting the results of intramammary infections diagnostic test and its relationship with the herd sanitary status and the sample size. Data used in this study corresponded to microbiological testing of composite milk samples of lactating cows from dairy farms located in the Provinces of Santa Fe, Córdoba and Buenos Aires (Argentina) between May 1999 and August 2007. The results reinforce the importance to be given to the type or test used to studies at herd-level and the consideration to interpreting the diseases prevalence.Fil: Signorini, M.L. CONICET. ArgentinaFil: Signorini, M.L. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Santa Fé, ArgentinaFil: Canavesio, V.R. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaFil: Neder, V.E. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaFil: Molinieri A.I. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaFil: Vitulich,C.A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaFil: Tarabla, H.D. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaFil: Calvinho, L.F. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria (EEA) Rafaela. Departamento de Epidemiología y Enfermedades Infecciosas. Santa Fé, ArgentinaEl objetivo del presente trabajo fue ilustrar las dificultades para interpretar los resultados de las principales pruebas diagnósticas individuales para infecciones intramamarias (IIM) y su relación con el estatus sanitario del rodeo y el tamaño del muestreo. Los datos empleados correspondieron a muestreos realizados en tambos de las provincias de Santa Fe, Córdoba y Buenos Aires (Argentina) entre mayo de 1999 y agosto de 2007, seleccionados sobre la base de presentar problemas de IIM. Los resultados refuerzan la importancia que debe darse al tipo de prueba empleada para estudios a nivel de rodeo y las consideraciones que deben realizarse para interpretar la distribución de las prevalencias de las enfermedades antes de realizar cualquier extrapolación a partir de pruebas diagnósticas individuales. Para clasificar correctamente la prevalencia de IIM a nivel de rodeos en los que se presume una baja prevalencia, se debe muestrear una proporción de animales cercana al 15% y tender al empleo de técnicas diagnósticas con alta sensibilidad, mientras que la especificidad de la técnica es importante cuando se presumen prevalencias altas