IRIS Università degli Studi dell'Aquila
Not a member yet
68355 research outputs found
Sort by
Modeling habitat suitability and connectivity for the sole endemic genus of Italian vertebrate: present and future perspectives
Get PDFBackground: Amphibians are the most globally threatened vertebrates, facing a particularly high risk of extinction in some regions, such as the Mediterranean basin. Within this region, the genus Salamandrina, comprising two species of notable conservation concerns, managed to persist throughout historical climate changes exclusively along the Italian peninsula. Among the main threats to this genus are habitat loss and climate change, as this salamander is adapted to humid forests and relies heavily on water sources, such as small streams, for reproduction. In this study, we employed fine-scale species distribution models (SDMs) to estimate areas projected to remain suitable for Salamandrina species in the future and areas expected to become unsuitable, incorporating bioclimatic, topographic, and habitat variables. We also evaluated landscape connectivity and identified ecological corridors that could facilitate movement through circuit-theory techniques, analyzing potential changes under different scenarios. Additionally, considering known hybridization events in a contact zone between the two species, we measured connectivity to assess whether this process might change in the future. Results: We found several suitable areas that mostly align with the known ranges of both species. Future projections showed an overall decline in habitat suitability, with a northwestern shift. While strong in certain areas, landscape connectivity is expected to decrease overall. Specifically, our results revealed several corridors for S. perspicillata (the northern species), with higher connectivity values in the Central Apennines. For S. terdigitata (the southern species), a crucial corridor in the Catena Costiera Massifs, in the western southernmost region of the Italian peninsula, connects two key conservation areas. In the contact zone, we identified corridors that could favor hybridization between the species, with predictions suggesting an increase. Conclusions: Our findings inform the long-term conservation of a unique salamander genus. Strengthening conservation measures on Salamandrina species in areas predicted to become unsuitable or in areas that could become suitable and serve as ecological corridors will be critical. Furthermore, future monitoring efforts should focus on the corridors identified in the contact zone to assess whether the hybridization process is ongoing and at what rate
Tra continuità e italianizzazione. Qualche aggiornamento sullo status dei dialetti in Abruzzo
No full textIl contributo fa il punto sulla situazione attuale dei dialetti abruzzesi. Nella prima parte viene messa in luce la notevole continuità esistente tra il dialetto documentato a fine Ottocento a Lanciano da Gennaro Finamore e quello usato a partire dagli anni Settanta del Novecento dalla signora Margherita Anzellotti, la quale ha fissato per iscritto, usando il dialetto de suo paese (Miglianico, Ch), usi, tradizioni, aneddoti e ricordi di vita paesana e familiare, creando così un inedito ed efficacissimo “(auto)ritratto” della sua comunità. Nella seconda parte vengono invece analizzati alcuni concreti casi di italianizzazione fono-morfologica e lessicale oggi osservabili nella parlata, di tipo mediano, di Tagliacozzo (Aq) e in quella, di tipo alto-meridionale, di Bugnara, presso Sulmona (Aq)
Diagnosis, management and outcomes of incarceration or intussusception of Fallopian tubes following uterine perforation after vacuum aspiration or dilatation and curettage of the uterine cavity: a systematic review of the literature
Get PDFSetting higher standards for migraine prevention: A position statement of the International Headache Society
Get PDFMigraine is one of the most prevalent and disabling neurological diseases, significantly affecting quality of life and productivity, as well as contributing to substantial societal costs. Recent innovations, including calcitonin gene-related peptide (CGRP) pathway inhibitors and onabotulinumtoxinA, have transformed migraine prevention by offering high efficacy and excellent tolerability, thus improving adherence. Clinical trials and real-world studies show that significant reductions in migraine frequency and, in some cases, complete migraine freedom is achievable. In this Position Statement, we advocate for raising the standards of migraine prevention by setting ambitious treatment goals aimed at optimal outcomes, such as migraine freedom or very low number of days with migraine or moderate/severe headache. We emphasize the importance of addressing residual migraine burden, highlighting that achieving a ≥50% reduction in monthly migraine days, although often considered a successful response, may not fully restore quality of life. Relying solely on percentage-based improvements can obscure the persisting impact of residual burden. This Position Statement does not want to change the standards for clinical trials but aims primarily at real-world clinical practice and proposes a shift from percentage-based measures of success to absolute goals while on treatment. We outline a framework that categorizes outcomes into four tiers: migraine freedom (no days with migraine or moderate-to-severe headache), optimal control (less than four days with migraine or moderate-to-severe headache), modest control (four to six days with migraine or moderate-to-severe headache) and insufficient control (more than days with migraine or moderate-to-severe headache). Focusing on residual burden while on treatment aims to further improve patient quality of life and drive innovation in preventive therapies and non-pharmacological approaches. By advocating for higher standards, this Position Statement, is not aimed primarily to drive reimbursement policies for migraine preventive treatments, but seeks to inspire clinicians, researchers and policymakers to prioritize ambitious goals in migraine prevention, ultimately enhancing patient outcomes and reducing the broader societal and economic impact of this debilitating condition
AI-Powered Analysis of Eye Tracker Data in Basketball Game
Get PDFThis paper outlines a new system for processing of eye-tracking data in basketball live games with two pre-trained Artificial Intelligence (AI) models. blueThe system is designed to process and extract features from data of basketball coaches and referees, recorded with the Pupil Labs Neon Eye Tracker, a device that is specifically optimized for video analysis. The research aims to present a tool useful for understanding their visual attention patterns during the game, what they are attending to, for how long, and their physiological responses, blueas is evidenced through pupil size changes. AI models are used to monitor events and actions within the game and correlate these with eye-tracking data to provide understanding into referees’ and coaches’ cognitive processes and decision-making. This research contributes to the knowledge of sport psychology and performance analysis by introducing the potential of Artificial Intelligence (AI)-based eye-tracking analysis in sport with wearable technology and light neural networks that are capable of running in real time
Benefits assessment of a dual-intake-port sliding vane rotary expander replacing the high pressure throttling valve of a trans-critical CO2 refrigeration unit
Get PDFRefrigeration sector is responsible of the 7.8 % of the worldwide greenhouse gases emissions pushing participants
to COP 28 to commit a reduction close to 70 % by 2050 of the 2022 CO2 emissions level. To this aim, the
adoption of the CO2 as working fluid is particularly suitable. In refrigeration compression system, to the valve
throttling is associated the most severe cycle irreversibility wasting up to the 20 % of compressor input work. To
overcome this issue, the replacement of these devices with volumetric expanders is one of the most effective
solutions. Despite the huge interest about this topic, a knowledge gap is observed on impact the expander would
produce on the refrigeration plant. In fact, the valve replacement with an expander must keep the same cooling
performances as well as the same thermodynamic properties on most relevant variables the refrigeration unit had
before the substitution. To reach this result, the availability of detailed model of the refrigeration unit is needed,
able to represent the whole complexity of the processes occurring (propagative, inertial and volumetric properties).
To fill this gap, in the present paper a novel comprehensive model of the unit was developed and
experimentally validated against experimental data collected on a fully instrumented test bench in which an
industrial refrigeration unit (18 kW as refrigeration power) was operated. Once the model resulted validated, it
was used to predict the plant behaviour if the throttling valve was replaced by a Sliding Rotary Vane Expander
(SVRE). Concerning the expander design, a further innovation was considered referring to a dual intake port
technology DIP. To assess the introduced benefits, an expander model validated in previous works developed by
the authors was used. Adapting this model for the application at hand and integrating it with the plant whole
model, it was found that an improve up to 20 % the whole efficiency with respect to the baseline case was
achieved for the maximum considered external temperature (31 ◦C-33 ◦C)
Efficient Fault-Tolerant Search by Fast Indexing of Subnetworks
Get PDFWe design sensitivity oracles for error-prone networks. For a network problem Π, the data structure preprocesses a network G = (V, E) and sensitivity parameter f such that, for any set F ⊆ V ∪ E of up to f link or node failures, it can report the solution of Π in G−F. We study three network problems Π. • L-HOP SHORTEST PATH: Given s, t ∈ V, is there a shortest s-t-path in G−F with at most L links? • k-PATH: Does G−F contain a simple path with k links? • k-CLIQUE: Does G−F contain a clique of k nodes? Our main technical contribution is a new construction of (L, f)-replacement path coverings ((L, f)-RPC) in the parameter realm where f = o(log L). An (L, f)-RPC is a family G of subnetworks of G which, for every F ⊆E with |F|< f, has a subfamily GF ⊆G such that (i) no subnetwork in GF contains a link of F and (ii) for each s, t∈V, if G−F contains a shortest s-t-path with at most L links, then some subnetwork in GF retains at least one such path. Our (L, f)-RPC has almost the same size as the one by Weimann and Yuster (2013) but it improves the time to query GF from Oe(f2Lf) to Oe(f25 Lo(1)). It also improves over the size and query time of the (L, f)-RPC by Karthik and Parter (2021) by nearly a factor of L. From this construction, we derive oracles for L-HOP SHORTEST PATH, k-PATH, and k-CLIQUE. Notably, our solution for k-PATH improves the query time of the one by Bilò et al. (2022a) for f = o(log k)
Conveyor-Based Single-Input Triple-Output Second-Order LP/BP and Cascaded First-Order HP Filters
Get PDFIn this paper a new single-input independent multiple-output universal tunable filter employing second-generation current conveyors (CCII) and second-generation voltage conveyors (VCII) as active elements is presented. The proposed filter has been analyzed at transistor level, using a CMOS standard AMS 0.35 μm technology, and implemented using discrete components based on the commercially available AD844. A detailed mathematical analysis is carried out, considering also parasitic impedances and non-ideal parameters. The low-pass, band-pass, and high-pass responses are simultaneously obtained and experimentally verified at 10 kHz central frequency where the voltage gain is about 27 dB for each output. THD analysis has been performed to evaluate the proposed work
Modelli 3D per la fruizione online del patrimonio museale
No full textThe paper presents the 3D digitization activities of the San Domenico ceramics collection
preserved at the PoMAq Museum of the University of L’Aquila, carried out within the framework of the Depositi project of the interuniversity research center CeDiPa, with the aim of communicating and enhancing them online. Starting from structured light scans and subsequently photogrammetry,
the goal is to test a procedure for defining suitable characteristics of the digital models of the heritage under study.Il contributo presenta le attività di digitalizzazione 3D della collezione di ceramiche di
San Domenico conservate presso il museo PoMAq dell’Università degli Studi dell’Aquila,
condotta nell’ambito del progetto Depositi del Centro di Ricerca interateneo CeDiPa, al fine della loro comunicazione e valorizzazione online. Prendendo avvio da scansioni a luce strutturata e quindi fotogrammetria, l’obiettivo è sperimentare una procedura per la definizione di adeguate caratteristiche dei modelli digitali del patrimonio in oggetto
