Archivio istituzionale della ricerca - Alma Mater Studiorum Università di Bologna
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Racconto antico e altre poesie disperse
No full textTraduzione delle poesie disperse di W. Szymborska, premio Nobel 1996, tradotte per la prima volta in una lingua straniera, accompagnate da note e da un ampio saggio critico finale
Search for quantum decoherence in neutrino oscillations with six detection units of KM3NeT/ORCA
No full textNeutrinos described as an open quantum system may interact with the environment which introduces stochastic perturbations to their quantum phase. This mechanism leads to a loss of coherence along the propagation of the neutrino - a phenomenon commonly referred to as decoherence - and ultimately, to a modification of the oscillation probabilities. Fluctuations in space-time, as envisaged by various theories of quantum gravity, are a potential candidate for a decoherence-inducing environment. Consequently, the search for decoherence provides a rare opportunity to investigate quantum gravitational effects which are usually beyond the reach of current experiments. In this work, quantum decoherence effects are searched for in neutrino data collected by the KM3NeT/ORCA detector from January 2020 to November 2021. The analysis focuses on atmospheric neutrinos within the energy range of a few GeV to 100 GeV. Adopting the open quantum system framework, decoherence is described in a phenomenological manner with the strength of the effect given by the parameters Γ21 and Γ31. Following previous studies, a dependence of the type Γij ∝ (E/E0)n on the neutrino energy is assumed and the cases n = -2,-1 are explored. No significant deviation with respect to the standard oscillation hypothesis is observed. Therefore, 90% CL upper limits are estimated as Γ21 < 4.6· 1021GeV and Γ31 < 8.4· 1021GeV for n = -2 and Γ21 < 1.9· 10-22GeV and Γ31 < 2.7· 10-22GeV for n = -1, respectively
5G Architectures Enabling Remaining Useful Life Estimation for Industrial IoT: A Holistic Study
Full text linkIn the ever-evolving landscape of industrial connectivity, significant strides have been made in the integration of 5th generation (5G) cellular technology with industrial internet of things (IIoT) systems. At the same time, data-driven analytics has become an effective tool for leveraging information from interconnected industrial devices, enabling organizations to gain valuable insights and make informed decisions. However, among these advancements, the holistic perspective of end-to-end analysis related to their integration remains a critical aspect that has yet to be comprehensively addressed. To this end, we investigate 5G IIoT network architectures that support automated guided vehicles (AGVs) on a factory floor as an illustrative example. In particular, we leverage real sensor data collected by AGVs to estimate their remaining useful life (RUL) using a deep learning (DL)-based pipeline. We conduct an in-depth analysis to assess the compatibility of 5G New Radio infrastructures with the aforementioned case study, focusing on round trip time (RTT) requirements and emphasizing the inter-dependencies between communication network and data-driven application
Nuova vita per l’Istituto Cavazza : idee progettuali per una palazzina polifunzionale
No full textL’Istituto Cavazza oggi sente l’esigenza di adeguare i propri spazi in cui, ogni giorno, svolge in favore degli utenti attività di supporto all’istruzione e arricchimento culturale, formazione professionale, alfabetizzazione tecnologica e sviluppo di capacità tecniche per facilitarne l’autonomia personale e l’integrazione sociale. La necessità di affrontare nuove forme di disabilità, sempre più complesse, richiede una revisione e valorizzazione degli spazi ambulatoriali e residenziali. Per questo fine, l’Istituto intravede grandi potenzialità nella “palazzina”, posta in una posizione baricentrica per il complesso edilizio in cui esso ha sede, realizzata negli anni ’50 con una struttura in cemento armato, e sviluppata su quattro livelli fuori terra. Dalla volontà di esplorare le potenzialità della palazzina, è nata l’idea di creare una sinergia tra l’Istituto e l’Università di Bologna (UNIBO) per raccogliere suggestioni progettuali per la “nuova vita” di questo edificio. Così, gli studenti del primo anno della Laurea Magistrale in Ingegneria Edile-Architettura, nell’ambito del corso di Architettura Tecnica 2, hanno sviluppato un progetto partecipato in cui il dialogo con l’Istituto ha assunto un ruolo centrale per la realizzazione di nuovi spazi versatili e facilmente adattabili, intuitivamente distribuiti e dunque agevolmente accessibili agli utenti
Editorial: Surface EMG and other measurement techniques in rehabilitation research and practice: are new educational programs needed?
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Am I Still Creative? The Effect of Artificial Intelligence on Creative Self‐Beliefs
Full text linkThe advent of Artificial Intelligence (AI) is reshaping society, highlighting the need to better understand its implications for human creativity. This investigation explores the relationship and differences between people's general creative self-beliefs and their creative self-beliefs in an AI-specific context (i.e., while using AI tools). It further investigates the role played by AI-specific creative self-beliefs and AI-augmented creative activity for creative achievement. In a study on Prolific panel members (N = 273), we found that people's general creative self-beliefs were notably higher than their AI-specific beliefs (d = 0.75). Moreover, the relationship between general and AI-specific creative self-beliefs followed a necessary-yet-not-sufficient pattern; feeling creative in AI settings was unlikely when general creative self-beliefs were low, yet strong general creative self-beliefs did not guarantee feeling creative when using AI. Finally, although general creative self-beliefs were both directly and indirectly (via creative activity) positively associated with creative achievement, AI-specific beliefs were only indirectly linked to achievement via AI-augmented creative activities, with more puzzling direct links observed. We discuss the implications of these findings and offer some future research avenues
Transformational leadership and teacher satisfaction : the enhancing roles of professional development and learning program management
No full textCurrently, educational institutions are going through significant challenges across all EU countries. Therefore, school principals need an appropriate leadership style to support teachers through these obstacles, supporting them in their professional development and promoting their satisfaction. This study explores the relationship between transformational leadership and teachers' job satisfaction through professional development attitudes. Moreover, we investigate the moderating role of learning program management, namely the leader's strategies and practices that integrate teacher development within a school-wide learning system. A sample of N = 1,091 tenured teachers answered our paper-and-pencil questionnaire. Study hypotheses were tested using structural equation modelling. The results of our study confirmed mediating and moderating hypotheses, emphasising the importance of supporting teachers' professional development to promote their satisfaction and foster their positive attitudes towards their development. Furthermore, we underline the importance of investing in school principals' leadership skills, which can be directly associated with teachers' personal and professional outcomes
Volition ascription to the addressee in a diachronic perspective. A unifying hypothesis for some post-volitional developments of Latin uolo
No full textPragmatic studies have recently shown that volition ascription to the addressee corresponds to specific strategies and deserves more attention. This paper discusses a series of post-volitional developments attested by second-person forms of the Latin verb uolo (‘I want’). Whilst these
grammaticalisation phenomena — some of which are also attested crosslinguistically — have mainly been dealt with separately, this paper shows that they can be treated in a unified manner, as all originally employ volition ascription as a conversational strategy. In Latin, uolo constructions
featuring the verb in the second person allowed the speaker to offer the addressee options to choose from or, in the case of prohibitive sentences, to preclude them from a specific choice. In this way, this paper sheds new light on volition ascription strategies as a pragmatic device and their diachronic developments in Latin as well as cross-linguistically
Diagnostic Performance of PIVKA-II in Italian Patients with Hepatocellular Carcinoma
Full text linkBackground and Aims: Hepatocellular carcinoma (HCC) represents the second leading cause of cancer deaths worldwide. Six-month imaging along with alpha-fetoprotein (AFP) serum levels detection are the current gold standard to exclude HCC. Protein induced by vitamin K absence (PIVKA-II) has been proposed as a potential screening biomarker for HCC. This study was designed to evaluate the role of PIVKA-II as diagnostic HCC marker, and the correlation between PIVKA-II levels and HCC stage. Methods: PIVKA-II levels were assessed on serum samples of Italian patients. The study population included 80 patients with HCC, 111 with liver cirrhosis (LC), and 111 with chronic hepatitis C (CHC). Results: PIVKA-II serum levels progressively increase from patients with CHC to patients with HCC. In the HCC group, PIVKA-II values are higher in the more advanced stages of the disease, assessed by the Barcelona Clinic Liver Cancer (BCLC) staging system (BCLC-B vs. BCLC-A vs. BCLC-0). Youden’s index analysis identified a value >37 mAU/mL as the optimal threshold for the best combination of sensitivity and specificity (80% and 76%, respectively) and, at the best cut-off of 5.2 ng/mL, AFP yielded 53% specificity and 78% sensitivity. The combination of PIVKA-II and AFP reached positive and negative predictive values of 73.9% and 94.2%, respectively. Conclusions: PIVKA-II levels are increased in the HCC patients, compared to control groups. The increase is more evident in patients with advanced HCC. The diagnostic performance of PIVKA-II seems more sensitive than AFP while the combination of PIVKA-II and AFP resulted in the best diagnostic accuracy, reaching 73.9% positive predictive value and 94.2% negative predictive value, thus improving the diagnostic capability of the single marker
Correlation between in vivo imaging and post‐mortem autopsy findings for the medico-legal evaluation of a right hepatic artery pseudoaneurysm as a fatal complication of laparoscopic cholecystectomy
Full text linkA 36-year-old woman diagnosed with complicated cholecystolithiasis underwent elective laparoscopic cholecystectomy (LC), then converted to open cholecystectomy because of a massive intraoperative bleeding. Hemostasis was performed with clipping and suturing the source of bleeding. In post-operative period, the patient suffered from persistent anemia associated with hemoperitoneum diagnosed through abdominal CT scanning, in absence of any sign of active bleeding. She died 16 days after the surgical procedure. Autopsy revealed the presence of 2 clips adjacent to the suture used for ligating the cystic artery and the presence of 3 surgical metal clips on the right hepatic artery, that should not be present in a routine cholecystectomy. The review of CT scans performed during the hospital stay revealed contrast extravasation from the right hepatic artery, near the 3 clips, allowing the post-mortem diagnosis of pseudoaneurysm (PA). The diagnosis of PA of right hepatic artery is typically made in living patients, through imaging, and autoptic identification is rarely obtained. The innovation of this report is to present an iconographic correlation between in vivo imaging and autopsy data, allowing for the tracing of the PA’s origin to the wall weakening caused by the placement of 3 clips on the right hepatic artery, and having significant medico-legal implications