Search results for " TECNOLOGIA"
showing 10 items of 1359 documents
Le cinte murarie medievali nella provincia di Catania. Problematiche conservative e ipotesi di conservazione della cinta muraria di Randazzo.
2011
Le cinte murarie urbane hanno costituito una presenza architettonica molto importante nell’impianto urbano della città antica, in particolar modo in quella medievale. Il loro studio e le problematiche conservative, che derivano dalla loro parziale demolizione e dall’integrazione con le nuove città, sono state un argomento di discussione in diverse città italiane. Di queste strutture oggi nelle maggiori città esistono resti che hanno un estremo bisogno di un recupero storico-architettonico. Prendendo spunto da una proposta di Legge Regionale, che prevede incentivi per gli interventi per la riqualificazione e il recupero dei centri storici medievali delimitati da cinte murarie , la ricerca me…
Sustainable recycling technologies for thermoplastic polymers and their composites: A review of the state of the art
2022
This review article discusses the environmental and economic effects of recycling, as well as sustainable thermoplastic polymer recycling technologies. Several researchers have utilized recycled thermoplastics as matrices in the production of a variety of natural and synthetic-based composites, which is also the focus of this study. All of the industries (food and packaging, construction and building, transportation, and indoor usage) where recycled thermoplastics have a large market share (food and packaging, construction and building, transportation, and indoor usage) are covered in this review. The desirable properties of thermoplastic polymers, such as corrosion resistance, low density,…
Configuración smart para el patrimonio Euro-Mediterráneo: el dibujo smart para el Rabàto de Agrigento
2014
Research on the rehabilitation of a district of the suburbs of the historic Italian city of Agrigento, from reinterpreting historical frame in a new key to space utilization invites reflection on the concept of urban regeneration in historic areas medium cities of Euro-Mediterranean context, at a time when the growth of cities seems to enter a phase of stagnation in which the tourism component of these areas reveals a possibility of urban transformation. The article proposes a methodology for analysis and intervention Rabato district in which energy efficiency, implementation of smart technologies and citizen participation are complemented by the incorporation of economic, cultural and soci…
On the mechanism of compatibilization of polyolefin/liquid crystalline polymer blends with graft copolymers
2000
The compatibilization mechanism of some compatibilizers for blends of polyolefins with a liquid crystalline polymer (LCP) was studied. Polyethylene (PE) and polypropylene (PP) were blended with a semirigid LCP (SBH) in a batch mixer, either with and without compatibilizers. The latter were two commercially available samples of functionalized polyolefins, that is, a PE-g-MA (HDM) and a PP-g-AA (Polybond 1001) copolymer and some purposely synthesized PE-g-LCP and PP-g-LCP copolymers. Microtomed films of the binary and the ternary blends were annealed at 240 degrees C on the hot stage of a polarizing microscope and the changes undergone by their morphology were recorded as a function of time. …
Behavior of Calcium Phosphate–Chitosan–Collagen Composite Coating on AISI 304 for Orthopedic Applications
2022
Calcium phosphate/chitosan/collagen composite coating on AISI 304 stainless steel was investigated. Coatings were realized by galvanic coupling that occurs without an external power supply because it begins with the coupling between two metals with different standard electrochemical potentials. The process consists of the co-deposition of the three components with the calcium phosphate crystals incorporated into the polymeric composite of chitosan and collagen. Physical-chemical characterizations of the samples were executed to evaluate morphology and chemical composition. Morphological analyses have shown that the surface of the stainless steel is covered by the deposit, which has a very r…
Effectiveness of Preservative Treatments on Coloured Ruditic Building Stones
2009
: The dark grey Breccia di Billiemi and the Ammonitico Rosso of Piana degli Albanesi, two coloured stones widely used in monuments both outdoor and indoor in Sicily, undergo significant decay as effect of weathering: colour change and development of surface microcracks which affect not only the chromatic aspect but also the state of aggregation. In a previous study (Fracture and Failure of Natural Building Stones, 2006, Springer, Dordrecht, The Netherlands: 329), such effects were successfully reproduced on laboratory samples by means of artificial accelerated weathering and the different response of veins and grains to the ageing agents was related to the microstructure of stones. In this…
AMBIENTE COSTRUITO E SOSTENIBILITÀ – Materiali riciclati e Design for Disassembly tra ricerca e buone pratiche
2020
In the context of environmental emergency of which the construction sector is one of the main causes – since it consumes 40% of the (embodied and operational) energy and produces about a third of the total waste – and due to the ambitious objectives set by the international community and by many countries to reduce the environmental impact of buildings during their whole life cycle, this paper wants to make a contribution to the understanding of the state of the art on cycle-based research activities, sustainable experiments and good practices that the building industry and the academy have implemented in recent years. In particular, it refers to cycle-based theoretical and experimental act…
Sustainable conservation: the state of art and the need of guidelines about protection and enjoyment of the archeological Heritage
2019
Within the scientific debate about the conservation, in general, of Cultural Heritage and, in particular, of Archaeological Heritage which are characterized by a dual tangible and intangible nature; and in consistence with Technological Culture for its features concerning the right development and enjoyment of the Heritage, the present essay offers a critical interpretation of the literature about a protection system with an architectural shelter for archaeological sites. On the basis of the critical elements detected in the activities that took place over the past sixty years, this essay underlines the absolute impossibility to postpone the definition of the guidelines which need to be alw…
PROTEGGERE E VALORIZZARE: RIFLESSIONI PER UNA BUONA PRATICA SUI SITI ARCHEOLOGICI
2014
Tra i beni culturali quelli archeologici hanno più animato il dibattito culturale sul rapporto fra conservazione e valorizzazione. La fragilità con cui la materia ci viene consegnata dalla storia, la frammentarietà del reperto, la scarsa disponibilità di risorse finanziarie, in relazione anche alla vastità del patrimonio a noi pervenuto, impongono interventi mirati e talvolta urgenti per la salvaguardia e la conservazione di tali beni. Ma la sola conservazione non può costituire l’obiettivo ultimo dell’intervento: essa deve interessare anche azioni di messa in valore, di fruizione e di comunicazione, necessarie per favorire un nuovo ruolo a queste realtà private dell’originaria identità. Qu…
Permanenze e innovazioni nell’architettura antica
2011
Il testo esamina brevemente il rapporto tra permanenze e innovazioni nell’architettura antica del mediterraneo con tre esempi, descritti sinteticamente e tratti dalle ricerche di dottorato degli autori.