119 research outputs found
A deep learning experiment for semantic segmentation of overlapping characters in palimpsests
Palimpsests refer to historical manuscripts where erased writings have been
partially covered by the superimposition of a second writing. By employing
imaging techniques, e.g., multispectral imaging, it becomes possible to
identify features that are imperceptible to the naked eye, including faded and
erased inks. When dealing with overlapping inks, Artificial Intelligence
techniques can be utilized to disentangle complex nodes of overlapping letters.
In this work, we propose deep learning-based semantic segmentation as a method
for identifying and segmenting individual letters in overlapping characters.
The experiment was conceived as a proof of concept, focusing on the palimpsests
of the Ars Grammatica by Prisciano as a case study. Furthermore, caveats and
prospects of our approach combined with multispectral imaging are also
discussed
Estakhr Project - Third preliminary report of the joint Mission of the Iranian center for archaeological research, the Parsa-Pasargadae research foundation and the Sapienza University of Rome, Italy
This report presents the preliminary results of the study of the pottery collected during the excavation campaign carried out in 2012 in the framework of the joint Iranian-Italian Archaeological Mission in Estakhr. The ceramic finds relate to a time span ranging from the 9th to the 12th century, corresponding to the occupation phases identified within the stratigraphy. Moreover, the use of archaeometry made it possible to identify both imported and locally manufactured wares
Antibacterial effect of zinc oxide-based nanomaterials on environmental biodeteriogens affecting historical buildings
The colonization of microorganisms and their subsequent interaction with stone
substrates under different environmental conditions encourage deterioration of materials by multiple
mechanisms resulting in changes in the original color, appearance and durability. One of the emerging
alternatives to remedy biodeterioration is nanotechnology, thanks to nanoparticle properties such
as small size, no-toxicity, high photo-reactivity, and low impact on the environment. This study
highlighted the effects of ZnO-based nanomaterials of two bacteria genera isolated from the Temple of
Concordia (Agrigento’s Valley of the Temples in Sicily, Italy) that are involved in biodeterioration
processes. The antimicrobial activities of ZnO-nanorods (Zn-NRs) and graphene nanoplatelets
decorated with Zn-NRs (ZNGs) were evaluated against the Gram positive Arthrobacter aurescens and
two isolates of the Gram negative Achromobacter spanius. ZNGs demonstrated high antibacterial
and antibiofilm activities on several substrates such as stones with different porosity. In the case of
ZNGs, a marked time- and dose-dependent bactericidal effect was highlighted against all bacterial
species. Therefore, these nanomaterials represent a promising tool for developing biocompatible
materials that can be exploited for the conservation of cultural heritage. These nanostructures can be
successfully applied without releasing toxic compounds, thus spreading their usability
A multi-analytical study on two International Gothic paintings
info:eu-repo/semantics/publishe
A multi-analytical study on two International Gothic paintings
info:eu-repo/semantics/publishe
SPETTROSCOPIE DEI BENI CULTURALI CON STRUMENTAZIONE PORTATILE
In questo lavoro vengono presentati i principi fisici della fluorescenza dei raggi X e della riflettografia infrarossa, due delle tecniche piĂą utilizzate per rispondere ad alcuni quesiti posti dagli Umanisti nello studio e nella conservazione dei Beni Cultural
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