On characters of Chevalley groups vanishing at the non-semisimple elements

Let G be a finite simple group of Lie type. In this paper we study characters of G that vanish at the non-semisimple elements and whose degree is equal to the order of a maximal unipotent subgroup of G. Such characters can be viewed as a natural generalization of the Steinberg character. For groups G of small rank we also determine the characters of this degree vanishing only at the non-identity unipotent elements.Comment: Dedicated to Lino Di Martino on the occasion of his 65th birthda

Territori lenti e resilienza locale. Il paradigma della lentezza come opportunità nel territorio sicano

Il contributo propone alcune riflessioni sulle opportunità di trasformazione dei territori interni e descrive i primi esiti di ricerca condotti nell’ambito del Laboratorio di Sviluppo Locale del “Polo Universitario di Ricerca di Bivona e Santo Stefano Quisquina per l’energia, l’ambiente e le risorse del territorio” , come motore dello sviluppo locale e dell’innovazione sociale dell’area interna dei Monti Sicani

The Density Effect in (W-S-W) Wood Connections with Internal Steel Plate and Passive Protection under Fire

The main objective of this work is to understand the fire behaviour of unprotected wood-to-wood connections with internal steel plate (W-S-W) in comparison with connections using passive protection with gypsum plasterboard. Passive fire protection uses systems that help prevent the spread of fire. Analytical methodologies according Eurocode 5 part 1-1 were used to the designed connections in different wood densities material. After that, to predict the fire exposure and the connection capacity a computational modelling was performed. Results of the temperature field and the char layer formation, for unprotected and protected members, were compared. Two different cross sections, only in wood or in wood-steel, were chosen to verify the evolution of charring rate effect.info:eu-repo/semantics/publishedVersio