Archivio Istituzionale della Ricerca- Università del Salento
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A Preliminary Study on the Experimental Characterization and Modelling of a 20kW Fuel Cell System for Ultralight Aviation
No full textDifferential cross-section measurements of Higgs boson production in the H → τ+τ− decay channel in pp collisions at sqrt(s) = 13 TeV with the ATLAS detector
Get PDFDifferential measurements of Higgs boson production in the τ-lepton-pair decay channel are presented in the gluon fusion, vector-boson fusion (VBF), VH and ttH associated production modes, with particular focus on the VBF production mode. The data used to perform the measurements correspond to 140 fb−1 of proton-proton collisions collected by the ATLAS experiment at the LHC. Two methods are used to perform the measurements: the Simplified Template Cross-Section (STXS) approach and an Unfolded Fiducial Differential measurement considering only the VBF phase space. For the STXS measurement, events are categorized by their production mode and kinematic properties such as the Higgs boson’s transverse momentum (pHT), the number of jets produced in association with the Higgs boson, or the invariant mass of the two leading jets (mjj). For the VBF production mode, the ratio of the measured cross-section to the Standard Model prediction for mjj > 1.5 TeV and pH T> 200 GeV (pH T < 200GeV)< 200 GeV) is 1.29+0.39 −0.34 (0.12+0.34 −0.33). This is the first VBF measurement for the higher-criteria, and the most precise for the lower-criteria. The fiducial cross-section measurements, which only consider the kinematic properties of the event, are performed as functions of variables characterizing the VBF topology, such as the signed ∆φjj between the two leading jets. The measurements have a precision of 30%–50% and agree well with the Standard Model predictions. These results are interpreted in the SMEFT framework, and place the strongest constraints to date on the CP-odd Wilson coefficient CHW
La devoluzione del Principato di Taranto alla Corona. Riorganizzazione dei quadri territoriali, ridistribuzione feudale e rinnovamento della componente signorile in Terra d'Otranto (1463-1500)
No full textIl saggio ricostruisce la geografia feudale della provincia di Terra d’Otranto nel XV secolo. Il censimento delle famiglie titolari di feudi consente di delineare la composizione della piccola nobiltà provinciale, direttamente soggetta al sovrano o vassalla dei signori di Taranto. La ricerca, fondata sul confronto incrociato di fonti in gran parte inedite (Repertori di privilegi feudali, Cedularia e Relevi), elabora una serie di carte storiche che ricostruiscono le principali circoscrizioni feudali idruntine. L'obiettivo è quello di mettere in luce le trasformazioni della geografia del potere signorile tra la prima e la seconda metà del Quattrocento, epoca in cui, a seguito della devoluzione alla Corona di Napoli del principato orsiniano, si assiste alla disgregazione dei grandi complessi feudali e all’emergere della media e piccola signoria
Descrivere l’arte pittorica per la disabilità visiva. Dalla comparazione dei modelli descrittivi allo sviluppo di un protocollo di audio descrizione integrato
Get PDFNegli ultimi anni, il tema dell’accessibilità dell’arte pittorica per le persone con disabilità visiva ha favorito lo sviluppo di protocolli descrittivi volti a tradurre il linguaggio artistico in narrazioni verbali dense e percettivamente efficaci. In questo ambito, diverse istituzioni, sia nazionali che internazionali, hanno elaborato linee guida che, pur condividendo principi comuni, si distinguono per finalità, approccio metodologico e grado di coinvolgimento sensoriale. Il presente contributo propone un’analisi comparativa di tre tra le principali linee guida attualmente disponibili: le Guidelines for Verbal Description del progetto statunitense Art Beyond Sight, le descrizioni accessibili della National Gallery of Art di Washington, concepite per la fruizione digitale autonoma, e il protocollo italiano DescriVedendo, sviluppato dall’Associazione Nazionale Subvedenti (ANS). Il confronto, che mette in luce punti di contatto e differenze significative, delinea tre visioni complementari dell’accessibilità estetica e apre un dialogo metodologico fertile, da cui scaturisce la proposta di un protocollo descrittivo integrato volto a valorizzare gli elementi più efficaci di ciascun modello e, conseguentemente, a promuovere una maggiore coerenza ed efficacia comunicativa
Progress in the IRIS Project in Italy
No full textIn the frame of the EU Next Generation Europe program, the Italian Minister of University and Research has approved the IRIS project (Innovative Research Infrastructure for applied Superconductivity). IRIS will be active in six poles. The six poles are spread all over Italy: Milano, hub of the infrastructure; Genova, Frascati, Napoli, Salerno, and Lecce. The scope of IRIS is to provide an infrastructure to accompany the development of applied superconductivity for basic research like accelerators. It also aims at developing societal applications of superconductivity, especially in the fields of sustainability and medicine. The new facility will support basic research on magnetism and superconducting materials, wires, tapes and large current cable tests; superconducting magnet construction with advanced instrumentation, superconducting magnet, and power transmission line tests. The program, which represents an investment of about €60 million, has passed halfway of its three-year life; once finished will be followed by at least 10 years of infrastructure exploitation. The IRIS construction program also includes two demonstrators: a 10 T dipole HTS magnet to be operated at 10–20 K and an electric superconducting transmission line capable of 1 GW (40kA–25 kV) of about 130 m long
Traveling around the Mediterranean Sea: the bryozoan Amathia verticillata (Delle Chiaje, 1822) together with non-indigenous and endemic overlooked nudibranchs (Mollusca, Gastropoda)
Get PDFThe Mediterranean Sea is recognized as a hot spot of biodiversity, but the ever-increasing commercial and recreational marine traffic and global warming pose significant threats to its fauna by enabling and facilitating, respectively, the introduction of non-indigenous species (NIS). To mitigate negative effects in the native communities, greater efforts are being made to generate updated lists of NIS and to monitor their spread over space and time. In this regard, Amathia verticillata (delle Chiaje, 1822), a worldwide distributed arborescent bryozoan, can play an important role as a vector of NIS due to its ability to be a species ‘carrier of other species’. Despite its importance, a detailed study on the highly specialized Nudibranchia molluscs associated with A. verticillata is still lacking. Given that some nudibranchs serve as powerful bioindicators of changes in the Mediterranean Sea, and considering that A. verticillata is an invasive species capable to facilitating the establishment and spread of NIS, a broad bibliographic study coupled with field investigations in different anthropized areas of the Central Mediterranean Sea were conducted. The nudibranch fauna associated with A. verticillata in the Mediterranean Sea was assessed for the first time. Nine species were found associated with this bryozoan, five of which were directly observed and analysed using morphological and molecular techniques. A case of cryptic diversity was revealed, with Polycerella recondita Schmekel, 1965 resurrected as a valid species, and the neglected Tenellia granosa (Schmekel, 1966) reported for the fourth time in the Mediterranean Sea. Notably, only three out of the nine species are Indo-Pacific, while the remaining six taxa have an Atlantic/Mediterranean distribution. This finding prompted further phylogenetic and haplotype network analyses on the two nudibranch species directly associated with A. verticillata: Bermudella polycerelloides and P. recondita. These analyses revealed different and previously unknown ecological traits of the spread of these two species
Intertidal biodiversity hotspot strikes again: first record of Caliphylla mediterranea A. Costa, 1867 (Mollusca, Sacoglossa) in the Adriatic Sea, Italy
No full textThe Mediterranean Sea is considered a hotspot of molluscan diversity even if many marine envi- ronments are still poorly explored and could mask rare and/or neglected diversity. During a night survey in a rocky tide pool in the Adriatic Sea, near Ancona, Italy, Caliphylla mediterranea A. Costa, 1867, a rare sacog- lossan mollusc, was observed and documented. This finding constitutes the first record of this species for the Adriatic Sea and one of the few for the whole Mediterranean basin extending the known distributional range of this poorly known species
Emersione anticipata della crisi, adeguati assetti e responsabilità degli organi sociali.
Get PDFIl contributo affronta il tema dell'emersione anticipata della crisi, quale Leitmotiv del Codice della Crisi di Impresa e dell’Insolvenza, quello complementare degli assetti organizzativi, amministrativi e contabili adeguati e quello conseguenziale dei profili di responsabilità degli organi sociali, rilevando le criticità che il sistema ancora presenta
I reperti lignei dal pozzo di Campo della Fiera: ambiente, tecnologia e vita quotidiana dal Convento alla Fiera
No full textDoes Board Gender Diversity Make Firms Less Greenwashed?
No full textThis study contributes to the literature on corporate environmental responsibility by investigating the impact of female board directorship on the environmental performance of listed financial and non-financial firms in Europe from 2013 to 2022. We propose a novel proxy for greenwashing that has not yet been implemented at the firm level in financial studies. We applied panel regression estimation with fixed effects to 1300 firm-year observations. The misleading baseline results show a negative relationship between female board directorship and environmental performance. Conversely, the second layer of analysis indicates a negative relationship between our greenwashing measure and female board directorship, supporting the positive role of women on boards of directors; spurious environmental performance measures obscure this significant association. A set of robustness checks and alternative specifications (generalized least squares and two-stage least squares) confirmed the consistency of our empirical results. This study has theoretical and managerial implications by reinforcing the crucial role of women in top management positions as supporters of environmental initiatives