Search results for "scienza"
showing 10 items of 1408 documents
Natural stabilization for bio-polymeric systems
2014
Italy in Uncertain Times: Europeanizing Foreign Policy in the Declining Proces of the American Hegemony
2019
Il libro analizza l'influenza dei cambiamenti nell'ordine internazionale egemonico a guida americana sulle variazioni nei pilastri tradizionali della politica estera italiana (USA, UE e multilateralismo) ed il ruolo che l'Italia gioca all'interno di quell'ordine. Per esplorare queste variazioni, il libro propone un'analisi del comportamento di voto e di sponsorizzazione dell'Italia alle Nazioni Unite nel periodo 2000-2017, guardando sia all'Assemblea Generale sia al Consiglio di Sicurezza, ed enfatizza l'importanza di quest'ultima sede per individuare i riflessi dei cambiamenti nel sistema internazionale sul comportamento italiano. Concentrandosi sul comportamento coalizionale, il libro esp…
A specific operative protocol set up during the restoration of San Michele Arcangelo’s marble statue
2009
Questo lavoro descrive le diverse fasi dell’intervento di conservazione di una statua di marmo del XVI secolo, raffigurante San Michele Arcangelo, custodita presso la Galleria Regionale di Palazzo Abatellis di Palermo. Inizialmente è stata effettuata un’indagine di archivio per inquadrare l’opera dal punto di vista storico artistico ed iconografico. Quindi sono stati effettuati: un rilievo grafico e digitale 3D, una mappatura di tutte le forme di degrado rilevate e dei segni di interventi precedenti, le analisi dei materiali costitutivi e dello stato di conservazione, mediante tecniche non distruttive o microdistruttive. Infine è stato progettato ed eseguito l’intervento di conservazione, a…
A specific operative protocol set up during the restoration of the Grammichele slate slab
2009
This work deals with the conservation of a slate slab, representing the map of Grammichele, a small town in the hinterland of South Eastern Sicily. The slab was engraved and painted in 1693, just after the tremendous earthquake that distroyed most of the towns in that area. The conservation process is illustrated through three steps: i) archive research; ii) physical chemical analysis of constitutive materials and degradation products; iii) planning and carrying out of the restoration and conservation operations.
Review of M. Beretta - F. Citti (ed.), 'Lucrezio, la natura e la scienza', Biblioteca di Nuncius / Istituto e Museo di storia della scienza, Firenze;…
2009
Si fornisce una recensione analitica dei diversi contributi che compongono il volume in oggetto, nonché della silloge nel suo insieme. Attraverso tale esame sono messi in luce e discussi alcuni nodi tematici essenziali della contemporanea critica lucreziana, con opportuni riferimenti al più vasto ambito di studi a cui il volume afferisce, ossia le indagini relative alla storia della scienza antica.
On the structural optimization in presence of base isolating devices
2012
The minimum volume design of plane frames constituted by elastic perfectly plastic material and subjected to appropriate combinations of fixed, cyclic and dynamic loads is studied. The influence on the design, in terms of cost (volume) and behavioural features, of seismic protecting devices is particularly focused. The considered protecting device is a lead rubber bearing base isolation system. Two optimal design problem formulations are proposed for the structure with or without the protecting device, both based on the so-called statical approach. The minimum volume frame is reached accounting for three different resistance limits: the purely elastic limit, the (elastic) shakedown limit an…
Il degrado degli stucchi serpottiano a Palermo in relazione alle condizioni ambientali di conservazione
2009
This work is part of a demanding project, called “Progetto Serpotta”, performed since 2000 in cooperation with Soprintendenza Beni Culturali of Palermo. Aim of the project is the restoration of the unique stucco's artworks moulded by Giacomo Serpotta and his co-workers end of 17th -beginning of 18th century. This paper is focused on the problem of salt efflorescences, that are widely present in all of the churches and oratories restored in the framework of “Progetto Serpotta”. Particular attention is given to the relationship between the constitutive matter of the stuccoes, as analysed by means of both X ray diffractometry and optical microscopy, and the salts composition, as analysed by me…
The skill in materials selection and processing at the Serpotta's studio during the baroque period in Palermo
2010
Preliminary Evaluation of Plasmix Compound from Plastics Packaging Waste for Reuse in Bituminous Pavements
2021
Finding an appropriate technical solution for reusing waste plastics is crucial for creating a circular plastic economy. Although mechanical recycling is the best option for recycling post-consumer plastics, some heterogeneous mixed plastics cannot be recycled to produce secondary material due to their very low properties. In this case, alternative routes should be considered in order to limit their disposal as much as possible. Therefore, in order to solve the environmental problems in the landfills of plastic waste recycling, and to improve the mechanical performance of bitumen for road pavement, the reuse of these post-consumer plastic wastes are preliminarily evaluated for the modificat…
Representation of Stationary Multivariate Gaussian Processes Fractional Differential Approach
2011
In this paper, the fractional spectral moments method (H-FSM) is used to generate stationary Gaussian multivariate processes with assigned power spectral density matrix. To this aim, firstly the N-variate process is expressed as sum of N fully coherent normal random vectors, and then, the representation in terms of HFSM is used.