Search results for " Materiali"
showing 10 items of 710 documents
A SICILIAN AUTHOR OF ACCOUNTING: EMANUELE PISANI AND HIS "STATHMOGRAPHY"
2008
The paper intends to present the accounting method 'invented' by Emanuele Pisani, the most relevant Sicilian author of the second half of the XIX century. His method was called "Stathmography" and it can be considered the "middle point" between the "personalistic" approach to accounts - that dominated the scene with Cerboni's work and the "materialistic" approach - that was introduced by Crippa and continued by Besta. Although its premises originated with previous authors, his idea was founded upon a new theoretical basis that was the first step to the greater development of the following accounting thought. Considering the importance of the context. A cross-fertilisation will be made withi…
Cave di Cusa in Sicily: a backdrop of solitude in a wild oasis
2011
I materiali lapidei dell’edilizia storica di Palermo: conoscenza per il restauro
2008
Discontinuità dei materiali in architetture siciliane d’età moderna
2016
Tre serie di esempi, legate alla scelta di operare una cosciente discontinuità dei materiali da costruzione, disegnano altrettante modalità di azione che la storia dell’architettura è chiamata a spiegare. Non si tratta infatti solo di registrare le componenti che delineano una tecnica costruttiva ma di svelarne i quozienti di eccezionalità e le possibili relazioni con esperienze precedenti. Il primo caso (a cura di M.R.Nobile) è legato a un trasferimento di tecniche costruttive (riferite alle volte tabicadas). Ulteriori esempi (a cura di E. Garofalo) ruotano intorno alla “scoperta” o “riscoperta” delle potenzialità di un materiale locale, la pietra pomice. Il terzo ambito di ricerca relativ…
Green and Integrated Wearable Electrochemical Sensor for Chloride Detection in Sweat
2022
Wearable sensors for sweat biomarkers can provide facile analyte capability and monitoring for several diseases. In this work, a green wearable sensor for sweat absorption and chloride sensing is presented. In order to produce a sustainable device, polylactic acid (PLA) was used for both the substrate and the sweat absorption pad fabrication. The sensor material for chloride detection consisted of silver-based reference, working, and counter electrodes obtained from upcycled compact discs. The PLA substrates were prepared by thermal bonding of PLA sheets obtained via a flat die extruder, prototyped in single functional layers via CO2 laser cutting, and bonded via hot-press. The effect of co…
Effect of sodium bicarbonate treatment on mechanical properties of flax-reinforced epoxy composite materials
2017
This paper deals with the evaluation of the effect of an eco-friendly and cost-effective surface treatment based on the use of sodium bicarbonate on the mechanical properties of flax-reinforced epoxy composites. To this aim, unidirectional fabrics were soaked for five days in 5 and 10% in weight of sodium bicarbonate solution at 25℃. Quasi-static and dynamic mechanical tests were performed and the fracture surfaces of the composites were analyzed through scanning electron microscopy. Results evidenced that this treatment improves the fiber–matrix adhesion thus increasing the performances of the composites. Treating the fabrics with 10% w/w of bicarbonate solution leads to improvements of ∼…
PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells
2021
This study explores the processability, mechanical, and thermal properties of biocompostable composites based on poly (butylene adipate-co-terephthalate) (PBAT) as polymer matrix and microcrystalline cellulose (MCC) derived from softwood almond (Prunus dulcis) shells (as-MCC) as filler at two different weight concentration, i.e., 10 wt% and 20 wt%. The materials were processed by melt mixing and a commercial MCC (c-MCC) was used as filler comparison. The fibrillar shape of as-MCC particles was found to change the rheological behavior of PBAT, particularly at the highest concentration. The melt mixing processing allowed obtaining a uniform dispersion of both kinds of fillers, slightly reduci…
Effect of UD carbon on the specific mechanical properties of glass mat composites for marine applications
2009
In this work the influence of a uniaxial carbon fabric layer on the mechanical performances of a glass mat/epoxy composite used for marine applications has been studied. All the structures have been made, at room temperature, by vacuum bagging technique. Tension and flexural tests have been carried out in order to evaluate the specific mechanical properties of the composite and to compare these with those of the marine aluminium alloy 6016-T4. The glass composites have higher specific strength but lower specific modulus than aluminium alloy. To increase the specific modulus of the composites, each layer of glass mat has been replaced with a layer of uniaxial carbon fabric. In addition, a s…
INDAGINI DIAGNOSTICHE PROPEDEUTICHE AL RESTAURO DELLA SALA DEI VENTI DI PALAZZO DEI NORMANNI A PALERMO
2019
La Sala dei Venti è uno dei più suggestivi luoghi del Palazzo dei Normanni a Palermo, si tratta di una struttura sita all’interno della Gioaria, una torre medievale dell’originale nucleo arabo-normanno, antistante la Sala di Ruggero, coperta da un soffitto ligneo dipinto, risalente al XVIII secolo, al centro del quale campeggia una rosa dei Venti che dà il nome all’ambiente. Le porzioni superiori delle pareti e la copertura, soggette nel tempo a numerosi restauri e rifacimenti, presentano una ricca decorazione dipinta suddivisa in tre livelli: quello superiore costituito dal soffitto dipinto (parzialmente incamottato); quello intermedio costituito dai dipinti murali con decorazioni a finto …