Search results for "Carlo"
showing 5 items of 1845 documents
An Updated Guideline for Assessing Discriminant Validity
2022
Discriminant validity was originally presented as a set of empirical criteria that can be assessed from multitrait-multimethod (MTMM) matrices. Because datasets used by applied researchers rarely lend themselves to MTMM analysis, the need to assess discriminant validity in empirical research has led to the introduction of numerous techniques, some of which have been introduced in an ad hoc manner and without rigorous methodological support. We review various definitions of and techniques for assessing discriminant validity and provide a generalized definition of discriminant validity based on the correlation between two measures after measurement error has been considered. We then review te…
Vertex corrections for positive-definite spectral functions of simple metals
2016
We present a systematic study of vertex corrections in the homogeneous electron gas at metallic densities. The vertex diagrams are built using a recently proposed positive-definite diagrammatic expansion for the spectral function. The vertex function not only provides corrections to the well known plasmon and particle-hole scatterings, but also gives rise to new physical processes such as generation of two plasmon excitations or the decay of the one-particle state into a two-particles-one-hole state. By an efficient Monte Carlo momentum integration we are able to show that the additional scattering channels are responsible for the bandwidth reduction observed in photoemission experiments on…
«L’ORDRE DANS LE MOUVEMENT». DAL SEMPIONE STRIZZA L’OCCHIO AL FREJUS AL BARBIERE DI CARLO MARX. GENESI ED EDIZIONI DIGITALI DI DUE INCOMPIUTI DI ELIO…
2020
Beam-induced and cosmic-ray backgrounds observed in the ATLAS detector during the LHC 2012 proton-proton running period
2016
This paper discusses various observations on beam-induced and cosmic-ray backgrounds in the ATLAS detector during the LHC 2012 proton-proton run. Building on published results based on 2011 data, the correlations between background and residual pressure of the beam vacuum are revisited. Ghost charge evolution over 2012 and its role for backgrounds are evaluated. New methods to monitor ghost charge with beam-gas rates are presented and observations of LHC abort gap population by ghost charge are discussed in detail. Fake jets from colliding bunches and from ghost charge are analysed with improved methods, showing that ghost charge in individual radio-frequency buckets of the LHC can be resol…
I MONUMENTI AI SOVRANI SPAGNOLI IN SICILIA NELLA SECONDA METÀ DEL SEICENTO: IL CASO DI FILIPPO IV A PALERMO E DI CARLO II A MESSINA
2018
I MONUMENTI AI SOVRANI SPAGNOLI IN SICILIA NELLA SECONDA METÀ DEL SEICENTO: IL CASO DI FILIPPO IV A PALERMO E DI CARLO II A MESSINA-Nella seconda metà del Settecento vennero eretti in Sicilia due grandiosi monumenti per celebrare gli ultimi re di Spagna della Casa d'Asburgo: il “teatro” di Filippo IV nel piano del palazzo Reale di Palermo (dal 1661) e il gruppo scultoreo con la statua equestre di Carlo II (dal 1680) nella piazza della cattedrale di Messina. I due monumenti rendevano omaggio in Sicilia, nei luoghi eletti simbolo del potere della corona spagnola, i trionfi di sovrani ancora in vita e secondo parametri compositivi articolati e meritevoli di attenzione. L’adozione di un reperto…