Search results for " tecnologia."
showing 10 items of 1339 documents
Editoriale
2020
Il numero 7 di AGATHÓN raccoglie saggi, studi, ricerche e progetti sul tema dal titolo ‘Dal Mega al Nano: la Complessità del Progetto Multiscalare’, tema indissolubilmente legato alla sempre maggiore richiesta di trans e multidisplinarietà del progetto. La capacità di effettuare ‘salti di scala’, di agire su scale diverse e di costruirne di nuove o di mutare il senso di quelle comunemente accettate è una pratica comune dell’approccio al progetto, e riguarda da sempre gli architetti, gli ingegneri, i designer e gli artisti, nei molteplici significati simbolici e reali della misura di un territorio, di una città, di un’architettura e di un oggetto. I concetti di scala e di misura sono indispe…
INTRODUZIONE - PARTE PRIMA
2011
ARCHITECTURE AND INNOVATION FOR HERITAGE a cura di Giuseppe De Giovanni Emanuele Walter Angelico. Il Patrimonio Culturale o Heritage non è di facile definizione, perché racchiude in sé interpretazioni varie, articolate e dalle molteplici accezioni, in quanto riferibile a tutto ciò che riguarda in prima istanza il passato, inteso sia in senso concreto e materiale sia in senso astratto e immateriale, ma anche le relazioni e i collegamenti che appartengono al presente. Oggi, sotto questo termine è possibile riconoscere l’insieme delle tradizioni cosiddette immateriali: leggende, miti, usi e costumi, canoni, proverbi, feste popolari, valori etici e morali, prodotti e marchi (brand) propri di un…
Efficacy of poly(lactic acid)/carvacrol electrospun membranes against Staphylococcus aureus and Candida albicans in single and mixed cultures
2018
Carvacrol (CAR) is one of the most promising essential oil components with antimicrobial activity. New technologies aimed to incorporate this active molecule into carrier matrix to improve the stability and prolong the biological activity. The goal of this study was to investigate the feasibility of incorporating CAR into electrospun membranes of poly(lactic acid) (PLA) for potential applications as active antimicrobial system. To this end, PLA membranes containing homogeneously dispersed CAR were successfully prepared and a series of systematic tests including morpho-mechanical properties, in vitro release rate, and antimicrobial/antibiofilm activities against Staphylococcus aureus and Can…
TOWERS, URNS AND CASTLETS. HISTORICAL EVIDENCE OF ANCIENT SYSTEMS OF WATER SUPPLY AND CONVEYANCE IN PALERMO
2016
Le vestigia del sistema distributivo idrico in uso a Palermo fino agli inizi del ventesimo secolo, sono ancora oggi visibili in alcune vie cittadine. Sono i castella dividicula, ovvero bacini di raccolta e distribuzione idrica. I castella dividicula comprendevano un sistema di urne, torri e castelletti posti ad un livello piezometrico equivalente alla quota della sorgente, sfruttando il principio dei vasi comunicanti. Il perpetuarsi del disuso e l’intensificarsi dell’attività edificatoria ha fatto si che molti di questi manufatti scomparissero inglobati all’interno di fabbricati, cortili, pozzi luce, o abbandonati come ruderi all’angolo di una piazza o lungo una via. Considerate per secoli …
Polysaccharide nanocrystals as fillers for PLA based nanocomposites
2016
The development of green nanocomposites based on biopolymers and bio-based nanofillers has attracted over the recent years the attention of academic and industrial research. Indeed, these nanocomposites could replace some oil-derived polymers and thus helping to overcome environmental problems. In this regard, PLA as matrix and polysaccharide nanocrystals as fillers are the most promising components to obtain high-performance green bio-nanocomposites suitable for different applications, particularly for packaging and biomedical applications. Indeed, at present, due to its processability, mechanical and biological properties, as well as its commercial availability, poly(lactic acid) (PLA) po…
Effect of Sheep Wool Fibers on Thermal Insulation and Mechanical Properties of Cement-Based Composites
2019
The use of sheep wool as a filler of cement in order to produce mortar or plaster involves several advantages for environment and energy. Moreover, it is considered as a waste and, therefore, its use is characterized by low cost. The aim of this paper is to evaluate the influence of wool fibers on thermal conductivity and mechanical properties of cement. The samples were prepared using wool fibers, obtained from a breed of Sicilian sheep, with three different lengths (i.e., 1, 6, and 20 mm). Furthermore, in order to evaluate the influence of fiber content, the samples were prepared by varying the fiber weight fraction. The thermal conductivity of the samples was analyzed by using a heat flo…
Coperture in vetro come opportunità di rigenerazione urbana
2013
Often historic centers preserve archaeological finds unable to talk about themselves, appeared on the scene of the city, that can now live with the people without stopping it. The reading of the historical centers’ layers can regenerate the historic structure and reconstruct the identity of the places. The remains can be protected and shown to the public and the heritage protection can be part of an overall project with attention to the quality of life, creating opportunities for historical memory, enhancement and tourist attraction. In particular, in the last decades, the solutions using mainly glass to cover the finds have become more widespread. The aim of this article is to analyze some…
Il recupero e la messa in valore della Judería di Segovia
2013
The Spanish town of Segovia, World Heritage Site, launched a process of valorisation of its historical centre, supporting conservation and musealisation of monuments as well as encouraging recovery of private houses, particularly in the Judería District. Here, thanks to the Program Área de Rehabilitación de Centro Histórico (ARCH), Segovians were encouraged to go back to the historical center. The Oficina Técnica de Rehabilitación coordinated activities and funding, promoted the participation of owners and entrepreneurs, sensitised citizens on the issues of cultural heritage. The results obtained in the Judería District were so good that ARCH has been adopting in the next district las Canon…
MUTAMENTI E PERMANENZE DELLA PALERMO ANTICA MUTATIONS AND PERMANENCES IN ANCIENT PALERMO
2017
La Palermo Antica si identifica con il Centro Storico, la cui complessità è il frutto dell’incontro di culture succedutesi nei secoli e che ha dato alla città la sua attuale facies. Questi luoghi sono oggi un microcosmo complesso dove i modelli culturali dei nuovi abitanti si relazionano al preesistente generando nuove espressioni dell’intervento antropico. L’analisi è volta ai nuovi scenari urbani, alle impronte, ai segni e ai mutamenti generati da un processo insediativo che vede coinvolti i nuovi residenti e le loro risorse, in un ambito che ha tutte le potenzialità per restituire Palermo al suo ruolo di capitale nell’ottica dell’integrazione, dell’accoglienza, della riqualificazione e v…
Valorisation of industrial iron oxide waste to produce magnetic barium hexaferrite
2016
Barium M-type hexagonal ferrite (BaM, BaFe12O19) is an immensely important magnetic material, which we have successfully made from the simple valorisation of Fe-rich industrial waste from steel wire drawing, with addition of BaCO3 and heating in air to 1000 degrees C. The optimum ratio of Fe. Ba (producing 86 wt% BaM) was found to be 11: 1 (non-stoichiometric), and secondary phases of alpha-Fe2O3 (non-magnetic) and ZnFe2O4 (poorly antiferromagnetic) were always present. This material consisted of small submicron platelets. A hard magnetic ferrite was produced with Ms=48.6 A m(2) kg(-1) and H-c=211.5 kA m(-1). The highest density was achieved by sintering samples with Fe: Ba ratios of 11: 1 …