226 research outputs found
La tavolozza di Francesco Hayez. Storia, conversazioni e scienza
No full textLa lunga ed emozionante carriera di Francesco Hayez, indiscusso caposcuola della pittura romantica in Italia, si è svolta in parallelo alle innovazioni dell’industria chimica dell’Ottocento e a contatto con gli ambienti artistici più avanzati dell’epoca.
Questo volume raccoglie i risultati della campagna di indagini - riflettografie e analisi spettroscopiche nell’infrarosso - svolta dal Dipartimento di Scienza e Alta Tecnologia dell’Università degli Studi dell’Insubria su ben sedici dipinti, realizzati tra il 1823 e il 1878. La ricerca ha permesso di aggiungere un importante tassello nella comprensione della tecnica prodigiosa dell’artista, fedele alle tradizionali pratiche di bottega ma sensibile verso la diffusione dei nuovi pigmenti di sintesi, resi disponibili dai progressi della chimica. È la prima occasione di uno studio sistematico con analisi non invasive e sperimentali su un corpus così ampio delle opere di Hayez: i dati raccolti permettono di ripercorrerne le scelte tecniche - disegno preparatorio, pigmenti, leganti - in un esteso arco temporale e attraverso diversi generi pittorici che spaziano dalla ritrattistica, alla pittura di storia, fino ai temi sacri
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Sara Rampazzi: COVID19: Science of using wirelessly powered sensors to quickly scale up verifiable decontamination of individual N95 respirator masks
No full textThis presentation was made by Sara Rampazzi, University of Michigan. The presentation’s title is: “COVID19: Science of using wirelessly powered sensors to quickly scale up verifiable decontamination of individual N95 respirator masks.” Funded by NSF Computer and Information Science and Engineering / Computer and Network Systems.
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Every month, the COVID Information Commons Team (along with the Northeast Big Data Innovation Hub) brings together a group of researchers studying wide-ranging aspects of the current pandemic, to share their research and answer questions from our community. The events showcase scientists' ongoing efforts in the fight against COVID-19, including opportunities for collaboration
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Sara Rampazzi: COVID-19 : Science de l'utilisation de capteurs alimentés sans fil pour étendre rapidement la décontamination vérifiable des masques respiratoires N95 individuels
No full textCette présentation a été faite par Sara Rampazzi. Le titre de la présentation est: “COVID-19 : Science de l'utilisation de capteurs alimentés sans fil pour étendre rapidement la décontamination vérifiable des masques respiratoires N95 individuels.”
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Chaque mois, l'équipe COVID Information Commons (avec le Northeast Big Data Innovation Hub) rassemble un groupe de chercheurs étudiant de nombreux aspects de la pandémie actuelle, pour partager leurs recherches et répondre aux questions de notre communauté. Ces événements mettent en valeur les efforts continus des scientifiques dans la lutte contre le COVID-19, notamment les opportunités de collaboration
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Sara Rampazzi: COVID19: Ciencia del uso de sensores inalámbricos para ampliar rápidamente la descontaminación verificable de máscaras de respirador N95 individuales
No full textDescripción de esta presentación:
Esta presentación fue hecha por Sara Rampazzi, University of Michigan. El título de la presentación es: "COVID19: Ciencia del uso de sensores inalámbricos para ampliar rápidamente la descontaminación verificable de máscaras de respirador N95 individuales."
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Descripción de los seminarios web del CIC:
Cada mes, el equipo del Centro de Información de COVID (junto con el Northeast Big Data Innovation Hub) reúne a un grupo de investigadores que estudian diversos aspectos de la pandemia actual, para compartir sus investigaciones y responder preguntas de nuestra comunidad. Los eventos muestran los esfuerzos continuos de los científicos en la lucha contra la COVID-19, incluyendo oportunidades de colaboración
Calcium oxalate films on works of art: A review
No full textThis work presents a review of the findings of calcium oxalate films, a widespread decay phenomenon recovered on stone and other substrates (mortars, wall and easel paintings, written materials, glass). The specific attention given to the issue in the 1990s has decreased, although articles have documented films until the present day. The review provides critical insights into the literature, focusing on the general properties of films, numerous case studies, the instrumental techniques used to characterise and date films, insights into the possible origin of the decay phenomenon, and an evaluation of the protective role of calcium oxalate layers. The practice of creating artificial films on stone surfaces for protective purposes is also considered. An evaluation of the literature over the last few decades shows various open issues. The origin is still up for debate, and the issue is still of major concern to conservation scientists, conservators, and restorers. The scientific community tends to attribute a biological origin to these films, however further studies are needed to study exactly how they form, focusing for example on simulation tests of the chemical and atmospheric pathway. How these films protect the artwork in terms of the mechanical properties of the surface underneath deserves more study. This would also help restorers to reproduce the calcium oxalate. The bibliography highlights the prevalence of calcium oxalate findings in the Mediterranean Basin and the formation of the least stable form, i.e. weddellite, which has yet to be explained
Gypsum based mixes for conservation purposes: evaluation of microstructural and mechanical features
No full textThis paper presents the study of four gypsum mixtures, focusing on the role of both inorganic and organic additives and on the micro-structural features and mechanical properties. Additives have been chosen among those most reported in historical recipes, for example magnesia, lime putty, rabbit glue. The selected mixes refer to gypsum-based materials used in artworks manufacture, such as plasters, mouldings, stuccoworks, pastiglia. Blank reference materials were prepared on purpose according to the specific recipe, in order to verify the final composition and to highlight the hardening mechanisms and the formation of setting compounds. The chemical composition was related to workability properties and final mechanical resistance and the action of additives as retardants was studied with interesting results. For instance, MgO imparts good properties to the mechanical features, especially with regard to the compressive strength characteristics
Biorestauro. Passato, presente e futuro. Quaderno della tavola rotonda a vent'anni dalla prima biopulitura di un'opera d'arte
No full textIl Quaderno racconta la storia di una rivoluzione silenziosa nel mondo dell’arte: il biorestauro. Per decenni, i maestosi affreschi del Camposanto di Pisa hanno lottato contro i danni della guerra e di restauri fallaci. Quando i metodi tradizionali si sono rivelati inefficaci, un team di scienziati e restauratori ha avuto un’intuizione geniale: usare batteri “golosi” per ripulire le opere d’arte senza intaccarle. Con precisione chirurgica, questi microscopici alleati hanno rimosso colle ostinate, croste nere e alterazioni, salvando capolavori. Questo testo racconta
il viaggio di una collaborazione straordinaria, nata in un laboratorio universitario e culminata in una tecnica innovativa, efficace e sostenibile che ha trasformato per sempre il restauro dei beni cultural
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