Search results for " TECNOLOGIA"
showing 10 items of 1359 documents
Novel organo-modifier for thermally-stable polymer-layered silicate nanocomposites
2015
A new novel approach for the stabilisation of polymer-clay nanocomposites has been investigated based on reacting chemically an antioxidant function, a hindered phenol moiety, with an organic modifier based on a quaternary ammonium salt. The chemically linked antioxidant-containing organic modifier (AO-OM) was then introduced into natural montmorillonite (MMt) through a cation-exchange reaction resulting in antioxidant-containing organo-modified clay (AO-OM-MMt). The new antioxidant-containing modified clay, along with other organo-modified clays having a similar organo-modifier but without the reacted antioxidant, were characterised by spectroscopic, thermogravimetric and x-ray diffraction…
Los interlocutores y las interlocutoras con los que comunica el trabajo social
2013
en trabajo social existen muchos mecanismos de comunicación en función del destinatario, del contexto en el que nos encontremos y de la institución para la que trabajamos. Debemos pues adaptarnos al tipo de interlocutora con que nos encontremos
MALTE INNOVATIVE PER LA COPERTURA DELLE CRESTE MURARIE IN AMBITO ARCHEOLOGICO
2014
The main objective of this study is to evaluate the opportunities offered by nanotechnologies to the production of innovative mortars with enhanced performances for the reconfiguration of walls ridges in the archaeological field. In particular, an already existing additive, based on silica nano-particles in aqueous solution, was tested mixing it in varying percentages to a hydraulic lime mortar and pozzolana. The following tests were carried out on different samples: resistance to bending and compression, adhesion to the surface, water absorption coefficient through capillarity, accelerated ageing test using salt mist. In the final stage, some comparative considerations among the different …
Involucri complessi
2010
Ultrasensitive and highly specific detection of iodine ions using zirconium (IV)-enhanced oxidation
2022
Nuclear energy has significantly promoted the development of human society. However, nuclear pollution caused by nuclear accidents can lead to significant hazards to the environment and human health. As a major radioactive product, radioactive iodine (mainly existing as I−) detection has attracted significant attentions. In this study, zirconium(IV) is used to enhance the oxidation of environmental I− to form I2. Subsequently, the generated I2 oxidizes the chemical chromogenic substrate 3,3′,5,5′-tetramethylbenzidine, which is used for I− detection and realizes an ultralow limit of detection (LoD) of 0.176 nM. The LoD of our method, to the best of our knowledge, is the lowest among those of…
IL SANTUARIO IPOGEO DEL "POZZO SACRO" DI SANTA CRISTINA A PAULATINO (OR) IN SARDEGNA
2007
Emblematic example of old architecture linked to the veneration of a natural place and its elements, the Sanctuary of Santa Cristina in Paulilatino in the province of Oristano in Central Sardinia; it will help us to understand how the search for formal, symbolic solutions was a stimulus enabling the nuraghic pre-historic civilisations to create and build this “Holy Well” tomb. An example of high architecture and technology for its innovative building systems and sophisticated static calculations, this Bronze Age Sanctuary, in exalting the use of stone, transmits refined building aspects as evidence of the advanced technological nuraghic culture.
2.3.4. Il processo di alienazione: Palazzo Barlotta di San Giuseppe e Palazzo Miano
2010
Il processo di alienazione del patrimonio costruito messo in atto dalle pubbliche amministrazioni impossibilitate a far fronte a costi di gestione e manutenzione dei beni in loro possesso ha posto la necessità di indirizzare e controllare i processi di trasformazione cui inevitabilmente i beni alienati saranno sottoposti. Ciò ha imposto che le pubbliche amministrazioni si dotino di nuove procedure e strumenti attraverso cui esercitare l’azione di indirizzo e di controllo sugli interventi previsti in modo da garantire funzioni compatibili e la permanenza dei valori espressi dai beni stessi. Nel contributo si riporta l’iter di alienazione seguito per alcuni immobili di proprietà comunale inse…
Comportamento al creep di biocompositi a base di PLA in presenza di irraggiamento UV
2018
Negli ultimi anni, l’interesse nei confronti dei biocompositi (spesso chiamati “compositi verdi”), realizzati con matrici polimeriche biodegradabili/compostabili e riempitivi organico-naturali ha conosciuto un livello crescente di interesse, sia da parte del mondo accademico che dell’industria. La letteratura fornisce numerose informazioni riguardo il comportamento di tali materiali (in particolare, riguardo il comportamento meccanico), ma di contro sono disponibili solo pochi dati riguardo il comportamento a creep [1] e, a nostra conoscenza, non sono disponibili studi sistematici riguardo il comportamento a creep sotto azione di raggi ultravioletti. Ci siamo quindi occupati di condurre uno…
Problemi di Conservazione di un'opera di Land Art di straordinarie dimensioni: il Grande Cretto di Alberto Burri a Gibellina (TP)
2009
This work deals with the conservation of one of the largest land art works in the world. It is a sort of white shroud laid on the ruins of the town of Gibellina, Sicily, after the tremendous earthquake of January 1968. The most significant aspects of the degradation phenomena observed on site are related to some faults in the construction, due to the prevailing of the artistic requirements over the good rules of concrete technology. Furthermore the guidelines for both a conservation intervention and the subsequent maintenance of the art work are also indicated.
Elementos para la comunicación en un caso de inflexibilidad autista
2019
Las tecnologías han abierto un mundo de posibilidades para la mejora del aprendizaje del alumnado con necesidades educativas especiales. En el caso del alumnado con TEA dos de los ámbitos en los que tienen más dificultades son la comunicación y la interacción social. En estas líneas, se describe un estudio de caso único realizado en una modalidad educativa no convencional, un centro de educación especial, centrado en el entrenamiento llevado a cabo con un autista de 18 años de edad, con altos grados de inflexibilidad para incluir nuevos pictogramas en la aplicación LetMeTalk de su comunicador. La intervención consistió en el diseño y configuración de una plantilla física para introducir pic…