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Transformations of crude oil into tar: a case study from a plastitar-contaminated site in NE Sicily, Italy (Western Mediterranean)
No full textThis study examines the aging of industrial crude oil to simulate the chemical transformations that occur when it is exposed to environmental conditions over time. It was triggered by the finding of plastitar — a mixture of tar and plastic waste — on the coast of Milazzo, Sicily. Research began with a chemical characterization of the tar component of plastitar, followed by aging experiments designed to simulate environmental conditions such as seawater, UV light and sunlight. Fourier transform infrared spectroscopy (FTIR) was used to analyze the chemical changes during the aging process and compare the results with local tar samples. The results showed significant chemical changes in the aged crude oil, including oxidation, degradation of hydrocarbons and the formation of oxygenated compounds. In particular, the FTIR spectra of the aged crude oil closely matched those of the local tar and provided valuable insights that could help address similar coastal pollution issues in other regions
Gender Potential in Italian Youth Activism: The Intersectional Assimilation of Gender Cultures After the Pandemic
No full textAbstract. The article focuses on the intersection of youth and gender studies, analysing the complex relationships between gender and youth identity as experienced both in individual biographies, and within the context of participatory practices. Thus, the focus is on the legacy of feminisms in current mobilization practices. In the article, we refer to empirical material collected in Italy from 2017 to the present. What emerges from our empirical material is that the pandemic accelerated the inclusion of gender issues in many youth mobilizations and in local youth activism generally, by highlighting the themes of care, inclusion and sharing. The paper is based on 150 qualitative interviews, and a number of ethnographic moments conducted in several Italian towns between 2017 and 2024, and therefore includes a period spanning the pre-pandemic, pandemic and post-pandemic phases; however, for this article we will focus primarily on the interviews conducted immediately after the Covid emergency, which best highlight the assimilation of the gender culture of care in activism practices. Interviewswere conducted with young women activists, but also with young men, including representatives from national student organisations. The empirical findings collected testify to the manifold nature of young people’s participatory practices, which range from climate issues to gender identity, from student claims to antiracism. In this article we focus on the relationship between gender identity and participatory practices based on mutual care
GRAD’S 14-MOMENTS MODEL FOR DENSE GASES OF SPHERES SUBJECTED TO INELASTIC COLLISIONS
No full textA 14-moments model for a dense granular gas is developed in the context of Grad’s theory. The gas consists of spheres subjected to inelastic collisions. This condition implies that the energy is not conserved, but a part of it is transformed into heat and this determines a dissipation of temperature. Furthermore, dense gases are characterized by two phenomena in inelastic collisions: the transfer and the transport of particle properties. The balance laws for mass, momentum, energy, stress tensor, heat flux and the fourth scalar moment are derived. The fluxes and the source terms are computed for each balance equation following the procedures elaborated by J. T. Jenkins and M. W. Richman [Arch. Rational Mech. Anal. 87, 355 – 377 (1985)]. The results are compared with the dilute elastic and inelastic gases. This new set of field equations can be useful in different applications
XXX National Annual Congress Italian Psychological Association Experimental Section, Noto (SR), 22nd – 25th September 2024
No full textProceeding
Particle production as a function of charged-particle flattenicity in pp collisions at sqrt(s) = 13TeV
No full textThis paper reports the first measurement of the transverse momentum (pT) spectra of primary charged pions, kaons, (anti)protons, and unidentified particles as a function of the charged-particle flattenicity in pp collisions at s=13 TeV. Flattenicity is a novel event shape observable that is measured in the pseudorapidity intervals covered by the V0 detector, 2.8<η<5.1 and -3.7<η<-1.7. According to QCD-inspired phenomenological models, it shows sensitivity to multiparton interactions and is less affected by biases toward larger pT due to local multiplicity fluctuations in the V0 acceptance than multiplicity. The analysis is performed in minimum-bias (MB) as well as in high-multiplicity events up to pT=20 GeV/c. The event selection requires at least one charged particle produced in the pseudorapidity interval |η|<1. The measured pT distributions, average pT, kaon-to-pion and proton-to-pion particle ratios, presented in this paper, are compared to model calculations using pythia 8 based on color strings and EPOS LHC. The modification of the pT-spectral shapes in low-flattenicity events that have large event activity with respect to those measured in MB events develops a pronounced peak at intermediate pT (2<8 GeV/c), and approaches the vicinity of unity at higher pT. The results are qualitatively described by pythia, and they show different behavior than those measured as a function of charged-particle multiplicity based on the V0M estimator
Spectral CT for non-invasive evaluation of bladder cancer grade
No full textObjectiveTo investigate the potential role of dual-energy spectral computer tomography (CT) quantitative parameters in the definition of bladder cancer (BCa) pathological grading.MethodsThis retrospective study evaluated the use of spectral CT imaging features for BCa. From 2021 to 2023, 63 patients with histologically-confirmed BCa diagnosis were examined at our Institution. The patients were pathologically divided, following international guidelines, into two groups: low-grade (n = 24) and high-grade urothelial carcinoma group (n = 39). The iodine concentrations (IC), the normalized iodine concentrations (NIC), and the slope of the spectrum curve (SLOPE) were calculated along with the measure of each lesion CT value on the monochromatic image from 40 to 120 keV. The diagnostic performance was assessed by Receiver operator characteristic curve (ROC) analysis.ResultsThe high-grade group showed significantly higher mean values of IC, SLOPE, and HU in 40 KeV monoenergetic images (VMI40 HU). AUC values for NIC, SLOPE, IC, and VMI40 HU were 0,677, 0,745, 0,745, and 0,755 respectively. In multivariate logistic regression models with backward stepwise, including all quantitative parameters, only VMI40 HU remained statistically significant to correlate with high-grade tumors.ConclusionPreliminary data shows that quantitative parameters of dual-energy spectral CT can be helpful to characterize low-grade and high-grade urothelial bladder tumors. The prediction of high-grade BCa with non-invasive methods (e.g. dlCT) can aid in early detection of muscle-invasive and worse prognostic tumors that need more aggressive and timely treatments, personalizing the management on the risk of recurrence
IL PILOTAGGIO COME SISTEMA DI GESTIONE DEL RISCHIO
No full textOn July 6, 1988 an offshore platform, the Piper Alpha, exploded in the North Sea. As a consequence, IMO developed the Formal Safety Assessment (FSA). FSA aims at reducing any risk when practicable and managing those that cannot be eliminated by developing mitigation measures. A mitigation system can be an external and/or internal measure to the ship.
The pilot's activity in pilotage in a modern risk management perspective can be considered an external and active component of risk mitigation for the ship.
The article examines pilotage and the international regulations adopted by IMO for the training of pilots, highlighting its role as a link between board and land
Impact of the pixelation method on the FARCOS telescope performances
No full textIn this contribution, the results achieved using the pixelation method for the FARCOS array will be presented. The α coincidence data in events produced in the reaction16O +12C will be analysed. A good energy resolution has been obtained in the reconstruction of the excitation energy of the populated resonances. The correction of inter-strip effects and the accurate reconstruction of the detection angles, also in events with 3 or more touched strips, improves the detection efficiency