Search results for "stuc"
showing 10 items of 91 documents
“Calcina e gesso e polvere di marmo”. Giacomo Serpotta e la plastica dello stucco tra Seicento e Settecento
2020
Il contributo prende in rassegna alcune delle principali opere prodotte dal maggiore stuccatore del Settecento siciliano, Giacomo Serpotta. Il percorso cronologico prende le mosse dalle esperienze della tradizione con gli apparati cinqucenteschi dei Ferraro e del padre Gaspare, proseguendo con le pietre miliari in cui la tecnica di Serpotta e la sua visione compositiva si evolvono. Sono affrontati anche alcuni aspetti tecnici costitutivi e costruttivi degli apparati.
Can vegetation provide indications of ancient lake shorelines after more than one hundred years? A case study of Iskander-kul Lake, Tajikistan
2017
Abstract Bioindication is a common approach to assess and evaluate environmental changes over both short or long periods of time. Here we attempt to highlight that vegetation can provide indications of the palaeoshoreline of Lake Iskander-kul, even after at least 150 years. It is an example of a dammed lake that was created by a huge mass rockfall as a result of a strong earthquake during the late Pleistocene. Applying the two way indicator species analysis (TWINSPAN) we found that the shrubby vegetation is the particular one that can still effectively thrive along the palaeoshoreline despite the lake downlift. Using the phi coefficient as a fidelity measure for certain vegetation type, we …
IL RESTAURO DELLA STATUA LIGNEA DORATA RAFFIGURANTE SANT’AGATA STUDIO SPERIMENTALE SUI MATERIALI PER L’INTEGRAZIONE DI PARTI LIGNEE MANCANTI
2015
In questo articolo si presenta l’intervento di restauro della statua lignea dorata, raffigurante Sant'Agata e scene di vita della Santa, eseguito nell’ambito di una tesi di laurea in Conservazione e Restauro dei Beni Culturali e la sperimentazione, ad essa collegata, sul comportamento meccanico e la compatibilità con il legno di alcuni materiali per stuccatura e reintegrazione. L'opera originariamente conservata presso il magazzino loggiato della Galleria Interdisciplinare Regionale della Sicilia di Palazzo Abatellis, è stata spostata presso l’oratorio dei Bianchi di Palermo per l’intervento di restauro svoltosi a cantiere aperto, per la prova di laurea magistrale in Conservazione e Restaur…
An authentication case study: Antonio Palomino versus Vicente Guillo paintings in the vaulted ceiling of the Sant Joan del Mercat church (Valencia, S…
2012
In 1695, the Valencian artist Vicente Guillo was engaged in painting the vault of the Sant Joan del Mercat church in Valencia, Spain. After preliminary work was carried out, his contract was cancelled. In 1697, Antonio Palomino, renowned for the publication of his technical treatise entitled El Museo Pictorio y Escala Optica, was finally selected as the painter in charge of decorating the vaulted ceiling of Sant Joan del Mercat. This paper reports an analytical study focused on the characterisation and discrimination of the palette and painting procedures used by Palomino and Guillo in the frescoes of Sant Joan del Mercat. For this purpose, Raman spectroscopy combined with light microscopy,…
Festuca valesiacaSchleich. ex Gaudin newly discovered in the Central Apennines (Italy): a further example of steppe relict in the Abruzzo “dry valley…
2019
Festuca valesiaca Schleich. ex Gaudin subsp. valesiaca is acknowledged as one of the most characteristic grasses of the continental grasslands and steppes of Eurasia. In Italy, the species was known almost only from the continental valleys of the Alpine chain (with the exception of two small populations at the northernmost edge of the Apennines). Here, we report on the first confirmed finding of F. valesiaca subsp. valesiaca in the surroundings of the Fucino Basin, Central Apennines. This finding expands by c. 400 km southwards the species’ range in Italy. The identity of the species was first ascertained by means of leaf cross-sections and stomata measurements, and then confirmed by chromo…
IL RESTAURO DELLA STATUA IN STUCCO “LA PENITENZA” NELLA CHIESA DI SANTA NINFA DEI CROCIFERI A PALERMO
2018
In questo lavoro viene presentato il restauro della statua in stucco rappresentante l’allegoria della Penitenza di scuola Serpottesca. L’opera si trova nella chiesa di Santa Ninfa dei Crociferi a Palermo e fiancheggia l’altare della cappella della Madonna della Salute insieme all’allegoria della Giustizia. L’opera non è autografa, nulli sono gli atti che ne documentano con certezza l’identità, ma è inequivocabile la sua appartenenza alla scuola dei Serpotta, la più importante bottega di maestri stuccatori del barocco siciliano, il cui massimo esponente è stato Giacomo. Il manufatto versava in condizioni di conservazione drammatiche principalmente a causa di, ormai risolte, ingenti infiltraz…
Organic Heterojunction Devices Based on Phthalocyanines: A New Approach to Gas Chemosensing.
2020
Organic heterostructures have emerged as highly promising transducers to realize high performance gas sensors. The key reason for such a huge interest in these devices is the associated organic heterojunction effect in which opposite free charges are accumulated at the interface making it highly conducting, which can be exploited in producing highly sensitive and faster response kinetics gas sensors. Metal phthalocyanines (MPc) have been extensively studied to fabricate organic heterostructures because of the large possibilities of structural engineering which are correlated with their bulk thin film properties. Accordingly, in this review, we have performed a comprehensive literature surve…
Analysis of the influence of processor hidden registers on the accuracy of fault injection techniques
2004
Modern processors tend to increase the number of registers, being part of them not accessible by the instruction set. Traditionally, the effect of faults in these hidden registers has not been considered during system validation using fault injection. In this paper, a study of the importance of faults in hidden registers is performed. Firstly, we have analysed the sensitivity of hidden registers to faults in combinational logic. In a second phase, we have analysed the impact of the faults occurred in hidden registers on system behaviour. A broad set of permanent and transient faults have been injected into the models of two typical commercial microcontrollers, using a VHDL-based fault injec…
Stuc. Huit fragments inédits de la cathédrale de Chartres
2011
International audience
Simple Circuit Models for Studying Global Earthing Systems
2007
The paper proposes three simple circuit models for the simulation of the behaviour of a global earthing system during different fault events. The models allow one the evaluation of the maximum earth potential rise at every possible fault location and for every possible fault event. The three considered fault events are: single-line-to-earth fault inside a MV/LV substation, double-earth-fault in a MV line, single-line-to-earth fault inside a HV/MV station. After having illustrated the hypotheses at the basis of the study, the circuit models for the three fault events are presented and a numerical example shows how to use them in order to check the "global safety" of the interconnected earthi…