Archaeometric identification of Maltese imports in prehistoric Sicily : Zebbug phase pottery from Licata-Caduta (Agrigento)

During the study of a pottery assemblage collected at the Sicilian site of Licata-Caduta (Agrigento), continuously occupied between the Neolithic and Early Bronze Age, some ceramics presented typologies, fabrics and surface treatments alien to Sicilian repertoires and closer to Maltese productions. Sampled for petrographic (OM) and chemical (XRF) analyses one artefact turned out to be produced in Malta and imported into Sicily. The search for its chronological and cultural placement has led to the discovery of the first certified Zebbug phase import in Sicily.peer-reviewe

Molecular and physical characteristics of aerosol at a remote free troposphere site: Implications for atmospheric aging

Aerosol properties are transformed by atmospheric processes during long-range transport and play a key role in the Earth\u27s radiative balance. To understand the molecular and physical characteristics of free tropospheric aerosol, we studied samples collected at the Pico Mountain Observatory in the North Atlantic. The observatory is located in the marine free troposphere at 2225m above sea level, on Pico Island in the Azores archipelago. The site is ideal for the study of long-range-transported free tropospheric aerosol with minimal local influence. Three aerosol samples with elevated organic carbon concentrations were selected for detailed analysis. FLEXPART retroplumes indicated that two of the samples were influenced by North American wildfire emissions transported in the free troposphere and one by North American outflow mainly transported within the marine boundary layer. Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry was used to determine the detailed molecular composition of the samples. Thousands of molecular formulas were assigned to each of the individual samples. On average  ∼ 60% of the molecular formulas contained only carbon, hydrogen, and oxygen atoms (CHO),  ∼ 30% contained nitrogen (CHNO), and  ∼ 10% contained sulfur (CHOS). The molecular formula compositions of the two wildfire-influenced aerosol samples transported mainly in the free troposphere had relatively low average O∕C ratios (0.48±0.13 and 0.45±0.11) despite the 7–10 days of transport time according to FLEXPART. In contrast, the molecular composition of the North American outflow transported mainly in the boundary layer had a higher average O∕C ratio (0.57±0.17) with 3 days of transport time. To better understand the difference between free tropospheric transport and boundary layer transport, the meteorological conditions along the FLEXPART simulated transport pathways were extracted from the Global Forecast System analysis for the model grids. We used the extracted meteorological conditions and the observed molecular chemistry to predict the relative-humidity-dependent glass transition temperatures (Tg) of the aerosol components. Comparisons of the Tg to the ambient temperature indicated that a majority of the organic aerosol components transported in the free troposphere were more viscous and therefore less susceptible to oxidation than the organic aerosol components transported in the boundary layer. Although the number of observations is limited, the results suggest that biomass burning organic aerosol injected into the free troposphere is more persistent than organic aerosol in the boundary layer having broader implications for aerosol aging

Bio-inspired kinematical control of redundant robotic manipulators

Purpose – This paper aims to propose an innovative kinematic control algorithm for redundant robotic manipulators. The algorithm takes advantage of a bio-inspired approach. Design/methodology/approach – A simplified two-degree-of-freedom model is presented to handle kinematic redundancy in the x-y plane; an extension to three-dimensional tracking tasks is presented as well. A set of sample trajectories was used to evaluate the performances of the proposed algorithm. Findings – The results from the simulations confirm the continuity and accuracy of generated joint profiles for given end-effector trajectories as well as algorithm robustness, singularity and self-collision avoidance. Originality/value – This paper shows how to control a redundant robotic arm by applying human upper arm-inspired concept of inter-joint dependency

Petro-archaeometric characterization of potteries from a kiln in Adrano, Sicily

Background: This work is part of a wide scientific project finalized to characterize the Sicilian pottery productions from Greek to Roman Age. In this prospective, local reference groups have been analysed in order to create a database of the circulation and production centres in Sicily during this period. In this framework, a set of 28 waste pottery fragments (III-II century B.C.) from a pit found during excavations at the fortification of Adrano (Sicily) have been studied. Characterization of the samples has been obtained by macroscopic, petrographic (OM), mineralogical (XRD) and chemical (XRF) analyses. Results: Macroscopic analysis of the studied potteries has allowed to distinguish four groups on the basis of grain size, porosity and clay paste color. Petrographic and mineralogical analysis, carried out on a selection of representative samples have allowed us to obtain useful information on the production technology of the studied samples. Moreover, information about raw materials and provenance of clay sediments has been obtained by comparing chemical data of the analysed samples with locally outcropping clay sediments reference data. Finally, chemical results on Adrano potteries have been compared with kiln wastes from Siracusa and Gela. Conclusions: The aim of the present work is to obtain fabric characterizations and technological information on a local reference group of ceramic specimens manufactured in Adrano (Sicily). Petrographic and mineralogical results allow us to esteem high firing temperature suggesting a good technological level of local production; in addition, chemical data suggest a local provenance of raw materials used in the production of the studied samples. The comparison with local production from Siracusa and Gela highlights several differences in the use of raw material and in the technological levels achieved in the different sites, over time. Therefore, this work provides a valuable contribution in defining the local scenario of ceramic production in South-Eastern Sicily during the Hellenistic Age and in producing local reference groups in the petro-archaeometric studies of archaeological potteries

Evaluation of the technological features of late roman cooking ware classes from Akrai (Syracuse, Sicily)

In this work, a provenance and technological investigation on cooking-ware potteries from the ancient Greek -Roman town of Akrai (Palazzolo Acreide, Syracuse, Sicily) has proposed. A multi-methodological approach have been used to study the manufacture quality of analysed materials; in detail, petrograp hic, mineralogical, spectroscopic, chemical, porosimetric and micro-morphological analyses have been applied. The study providesfundamental contribute in archeological issues related to circulation in Sicily of cooking -ware productions during Late Roman Age; in fact, the obtained results allow to recognize in the site the presence of different well-known cooking-ware Roman productions, highlighting interesting questions about the technological and manufacture properties of this class of materials

Elongated styloid process : an epidemiological study on digital panoramic radiographs

The styloid process is a projecton of the temporal bone, its lenght is between 20 to 30 mm, when it is longer than 30 mm it is defined elongated styloid process. The aim of this study is an epidemiological evaluation of 1003 digital panoramic radiographs in an Italian population between 5 and 90 years old. This is a retrospective analysis and the radiographs were selected from the Complex Operating Unit of Dentistry of Padua University Hospital database. The radiographs were performed using a Sirona Ortophos XG and the styloid process length was measured using the measuring tool of Sidexis Software. It was measured from the point where it left the temporal bone plate to its tip. Styloid processes measuring more than 30 mm were considered elongated. Chi-squared test, Fligner-Killeen test, Shapiro-Wilk test and t-test with Welch correction were performed. In the study 33.40% of the patients showed an elongated styloid process. The number of patients with elongated styloid process and the mean length of the process increase with the age confirming the chronic development of the calcification described in literature. No statistically significant correlation is found between the presence of elongated styloid process and the gender and affected side (bilateral or unilateral)

ISLAMIC POTTERY PRODUCTION IN EASTERN SICILY (10th-11th CENTURIES): PRELIMINARY ARCHAEOMETRIC DATA ON LOCAL AND IMPORTED PRODUCTS FROM PATERNÒ (SICILY).

From the 9th to the 11th century, Sicily has been part of the Islamic oecumene, the dār al-Islām. Up until now, very few studies have been carried out on the centres of pottery production of this period, and most of them concern the Emiral capital of the isle, Palermo. The archaeometric data obtained with chemical and minero-petrographic analyses on Islamic pottery found in Paternò – a town situated in the southwestern slope of Mt. Etna – has provided a certain number of issues of very important matter. The selection of the samples has been made among the archaeological finds coming from the excavation near the church of Cristo al Monte, on the hilltop, which represented the inner part of the medieval madīna. The mineralogical and chemical characterization of the ceramic body has been attained using optical microscopy on thin sections and X-ray fluorescence respectively, in order to define the probable provenance of each sample. Further information of technological matter has been provided using X-Ray diffraction on powdered samples, which furnishes mineralogical data useful to hypothesise the firing temperatures: the main task attained on this issue was the focus on the self-slipped ware with salted water, one of the main technological class in Islamic Sicily. Finally, energy dispersive X-Ray fluorescence was adopted for a preliminary investigation of pigments used to decorate the lead glazed pottery. The issues related to both the local and imported pots – the latter represented almost completely by Palermo"s products – provided some important historical and archaeological information about the means of Sicilian pottery production during this important period

Pottery production during "romanization" of Sicily: an archaeometric study of plain table-ware classes from ancient Akrai (Sicily)

In this paper, petrographic, mineralogical and chemical analyses have been performed on plain table-ware fragments discovered in the ancient town of Akrai (modern Palazzolo Acreide, Syracuse, Sicily) and dated between the Hellenistic and the Late Roman periods (4th-5th/6thcentury A.D.). The project is developed in the context of the archeological debate on the cultural and political process occurred in Sicily since the 3rd century B.C. and known in archaeological literature as Romanization. In this framework, a gradually substitution of Greek-Hellenistic materials with the Roman ones has occurred in Sicilian colonies and the city of Akrai was deepened involved in this process. As the sensitiveness of material culture to cultural and social changes, the archaeometric investigation has been focused on provenance and technological manufacture aspects of table-ware production, in order to delineate the eventually changes took place in the area during the investigated period. The comparison of obtained data with numerous references local groups of ceramics allows to identify different highly specialized local productions, drawing-back the commercial movements of potteries in Sicily during Roman Age

Durability tests on lime-based mortars from the historic built heritage of Catania (Eastern Sicily, Italy): An experimental study

Supplementary data to this article can be found online at https://doi.org/10.1016/j.jobe.2023.108137Mortars, like any other natural and artificial stone materials, are subject to atmospheric weathering agents which affect their durability according to the intrinsic characteristics of the material, such as mineralogical composition, texture and pore structure. This paper aims to investigate the physical-chemical durability of lime-based mortars made with two different volcanic aggregates, locally known as azolo and ghiara, peculiar of the historic built heritage of Catania (Eastern Sicily, Italy). An experimental approach has been used, based on the reproduction in laboratory of historic mortars by using ancient recipes. The experimental samples have been characterized from a physical point of view and then subject to accelerated aging tests. Specifically, the samples have undergone: i) mineralogical investigations through X-ray diffraction (XRD); ii) thin section analysis by polarized optical microscopy; iii) pore structure analysis through mercury intrusion porosimetry (MIP); iii) water absorption by capillarity; iii) water vapor permeability test; iv) accelerated aging test by salt crystallization; v) decay by sulfur dioxide. Results obtained highlight that the higher microporosity which characterizes the ghiara mortars is certainly responsible for their greater water absorption by capillarity as well as for their lower resistance to salt crystallization and exposure to sulfur dioxide, with respect to azolo-based ones.PNRR project PE5 “CHANGES - Cultural Heritage Active Innovation for Sustainable Society” – Spoke 5 (CUP E63C22001960006)EU-funded PON REACT project (CUP E65F21002200005)RNM 179 of the Junta de Andalucía (Spain