showing 36 of ~574560 from 574555 documents
An Original Convolution Model to analyze Graph Network Distribution Features
2022
Modern Graph Theory is a newly emerging field that involves all of those approaches that study graphs differently from Classic Graph Theory. The main difference between Classic and Modern Graph Theory regards the analysis and the use of graph's structures (micro/macro). The former aims to solve tasks hosted on graph nodes, most of the time with no insight into the global graph structure, the latter aims to analyze and discover the most salient features characterizing a whole network of each graph, like degree distributions, hubs, clustering coefficient and network motifs. The activities carried out during the PhD period concerned, after a careful preliminary study on the applications of the…
Hölder regularity for stochastic processes with bounded and measurable increments
2022
We obtain an asymptotic Hölder estimate for expectations of a quite general class of discrete stochastic processes. Such expectations can also be described as solutions to a dynamic programming principle or as solutions to discretized PDEs. The result, which is also generalized to functions satisfying Pucci-type inequalities for discrete extremal operators, is a counterpart to the Krylov-Safonov regularity result in PDEs. However, the discrete step size $\varepsilon$ has some crucial effects compared to the PDE setting. The proof combines analytic and probabilistic arguments.
Influence of Calcium Carbonate Nanoparticles on the Soil Burial Degradation of Polybutyleneadipate-Co-Butylenetherephthalate Films.
2022
A polybutyleneadipate-co-butylenetherephthalate (PBAT) sample, commercially known as Ecoflex®, was processed via melt extrusion with CaCO3 nanoparticles coated with a hydrophobic coating. Blown films of PBAT and two composites with nanofiller (2% and 5%wt) were prepared and degradation tests in soil at 30 °C up to 180 days were carried out with weight loss measurements. Furthermore, biodegradation test according to ISO 14851 was carried out at 30 °C. The effect of CaCO3 on soil burial degradation was assessed by surface wettability and SEM. ATR-FTIR and XPS analyses highlighted chemical modifications induced by soil degradation. CaCO3 nanoparticles decreased surface wettability …
Somatosensory Deviance Detection ERPs and Their Relationship to Analogous Auditory ERPs and Interoceptive Accuracy
2022
Abstract. Automatic deviance detection has been widely explored in terms of mismatch responses (mismatch negativity or mismatch response) and P3a components of event-related potentials (ERPs) under a predictive coding framework; however, the somatosensory mismatch response has been investigated less often regarding the different types of changes than its auditory counterpart. It is not known whether the deviance detection responses from different modalities correlate, reflecting a general prediction error mechanism of the central nervous system. Furthermore, interoceptive functions have been associated with predictive coding theory, but whether interoceptive accuracy correlates with devian…
PROGETTARE L’ADATTAMENTO. Resilienze di agricoltura urbana nel contesto europeo
2022
I crescenti fenomeni legati al cambiamento climatico spingono le città a sviluppare piani di resilienza che possano rispondere in termini di sostenibilità ambientale, sociale ed economica. Le strategie nature-based possono rappresentare una soluzione; tra queste l’agricoltura urbana può contribuire ad aumentare la resilienza dei tessuti urbani europei. Questa attività è stata più volte oggetto di interesse in periodi di crisi come impegno comunitario dai caratteri sociali, oltre che produttivi ed educativi. Attraverso un excursus storico e una successiva analisi di casi studio contemporanei, il paper fornisce strumenti progettuali per intervenire nel costruito con strategie che spaziano dal…
Evidence suggests an opportunistic entomophagous diet of the White Stork Ciconia ciconia in Sicily during breeding and post-breeding periods
2022
Insects are known to represent a critical part of the White Stork Ciconia ciconia diet throughout its breeding range. Yet, the composition of the diet in the storks breeding in the Mediterranean regions remains poorly explored. Here, we investigated the diet of a population of white storks from Sicily through pellets collected in 2003, 2007, and 2020. A total of 1,928 prey items were identified and classified into six categories. Insects dominated the diet in all years and represented 99.06% of the whole prey number. Two orders of insects were mainly consumed, namely Orthoptera, which were the most frequent prey, followed by Coleoptera. Within these, carabid beetles were dominant, followed …
Nucleo-cytoplasmic shuttling of RNA-binding factors: mRNA buffering and beyond.
2022
Gene expression is a highly regulated process that adapts RNAs and proteins content to the cellular context. Under steady-state conditions, mRNA homeostasis is robustly maintained by tight controls that act on both nuclear transcription and cytoplasmic mRNA stability. In recent years, it has been revealed that several RNA-binding proteins (RBPs) that perform functions in mRNA decay can move to the nucleus and regulate transcription. The RBPs involved in transcription can also travel to the cytoplasm and regulate mRNA degradation and/or translation. The multifaceted functions of these shuttling nucleo-cytoplasm RBPs have raised the possibility that they can act as mRNA metabolism coordinator…
Onset of the Messinian Salinity Crisis: Sedimentological, petrographic and geochemical characterization of the pre-salt sediments from a new core (Ca…
2022
The present study aims to reconstruct the environmental changes leading to the Messinian Salinity Crisis during the transition from the Tortonian-Messinian marine conditions to the Messinian evaporitic environments. The core 3AGN2S04, recently drilled in the Caltanissetta Basin (Sicily), was analyzed to reveal the petrographic, mineralogical and geochemical characteristics of the late Tortonian – early Messinian pre-salt sediments. In particular, the facies characterization of the carbonates and organic-rich shales of the Calcare di Base (CdB) member allowed to understand its significance in the paleoenvironmental evolution towards salt deposition and to the reconstruct the brecciation proc…
La relación de Amparo y José Iturbi con Eduardo López-Chavarri: un estudio a través de su correspondencia
2022
En este artículo se pretende analizar la relación entre el polifacético músico valenciano Eduardo López-Chavarri Marco (1871-1970) y los hermanos Iturbi: Amparo (1898-1969) y José (1895-1980), pianistas valencianos de gran proyección internacional en la primera mitad del siglo XX. El contenido principal de este trabajo se basa en el epistolario de Chavarri, centrando la atención en las cartas enviadas por José y Amparo. Gracias a estos materiales obtenemos la información y, sobre todo, el tipo de relación establecida entre los hermanos Iturbi y Chavarri en la etapa que va de 1911 a 1965. También se utilizan cartas de otros corresponsales de Chavarri y algunos escritos del propio compositor,…
Non-commutative Ring Learning with Errors from Cyclic Algebras
2022
AbstractThe Learning with Errors (LWE) problem is the fundamental backbone of modern lattice-based cryptography, allowing one to establish cryptography on the hardness of well-studied computational problems. However, schemes based on LWE are often impractical, so Ring LWE was introduced as a form of ‘structured’ LWE, trading off a hard to quantify loss of security for an increase in efficiency by working over a well-chosen ring. Another popular variant, Module LWE, generalizes this exchange by implementing a module structure over a ring. In this work, we introduce a novel variant of LWE over cyclic algebras (CLWE) to replicate the addition of the ring structure taking LWE to Ring LWE by add…
Time series momentum in the US stock market: Empirical evidence and theoretical analysis
2022
There is much controversy in the academic literature on the presence of short-term trends in financial markets and the trend-following strategy’s profitability. We restrict our attention to studying the time series momentum in the S&P Composite stock price index. Our contributions are both empirical and theoretical. On the empirical side, we present compelling evidence of the presence of short-term momentum. For the first time, we suppose that the returns follow a -order autoregressive process and evaluate this process’s parameters. On the theoretical side, we develop a tractable theoretical model that contributes to our fundamental understanding of the trend-following strategy’s risk, retu…
Autonomous Robotic Sensing for Simultaneous Geometric and Volumetric Inspection of Free-Form Parts
2022
Robotic sensing is used in many sectors to improve the inspection of large and/or complex parts, enhancing data acquisition speed, part coverage and inspection reliability. Several automated or semi-automated solutions have been proposed to enable the automated deployment of specific types of sensors. The trajectory to be followed by a robotic manipulator is typically obtained through the offline programmed tool paths for the inspection of a part. This method is acceptable for a part with known geometry in a well-structured and controlled environment. The part undergoing assessment needs to be precisely registered with respect to the robot reference system. It implies the need for a setup p…
Prevalence of Dens Invaginatus assessed by CBCT: Systematic Review and Meta-Analysis
2022
Dens invaginatus is a developmental dental anomaly resulting from an invagination of dental tissues folding from the outer surface towards dental pulp. The aim of this systematic review and meta-analysis was to determine the prevalence of dens invaginatus using cone beam computed tomography (CBCT).A systematic review was conducted following PRISMA statements. The research question was: What is the prevalence of dens invaginatus in the adult population assessed by CBCT? The MeSH terms were used to search articles published in the electronic database PubMed. Studies were selected considering predetermined eligibility criteria. The Robins-I tool developed by Cochrane was used to assess methodo…
Corrigendum to ‘Baveno VII – Renewing consensus in portal hypertension’ [J Hepatol (2022) 959-974]
2022
Influence of Guideline Operationalization on Youth Activity Prevalence in the International Children's Accelerometry Database
2022
Introduction: The United Kingdom and World Health Organization recently changed their youth physical activity (PA) guidelines from 60 minutes of moderate-vigorous PA (MVPA) every day, to an average of 60 minutes of MVPA per day, over a week. The changes are based on expert opinion due to insufficient evidence comparing health outcomes associated with different guideline definitions. Further, inconsistent guideline operationalization impairs understanding of physical inactivity prevalence. This study used the International Children’s Accelerometry Database to compare approaches to calculating PA compliance among youth and associations with health indicators. Methods: Cross-sectional accelero…
Changing the ownership of ideas: Multimedial accomplishment of collaborative reflection in an organizational workshop
2022
Reflecting on work processes together with one's co-workers is becoming increasingly important in workplaces. This study examined collaborative reflection in the organizational context through analyzing a case of a complex workplace setting where an enterprise social media platform, talk-in-interaction, and handwriting were used to engage participants in the process of reflection. Drawing on the concept of remediation, the results show that collaborative reflection is interactionally accomplished through a multimedial activity chain, in which the ownership of presented ideas is transformed from individual ideas into shared views of the team. The study shows in detail how the process of coll…
Mobilizing ‘context’: Vocabulary checks in ESL tutoring sessions
2022
This study investigates the practice of unplanned and emergent vocabulary checks, i.e. turns through which a speaker explicitly checks whether the recipient knows a word, in small-group tutorial instruction. The data are video-recorded English as a second language (ESL) tutoring sessions between a native English speaker tutor and ESL students at an urban community college in the United States. By drawing on conversation analysis, we analyze how vocabulary checks emerge sequentially and with the help of contextual interactional resources. Findings suggest that vocabulary checks constitute a practice for managing both shared understanding and pedagogical concerns. By singling out a vocabulary…
Advances and innovations in manufacturing systems research 2022
2022
Development and application of an alternative modelling approach for the thermo-mechanical analysis of a DEMO water-cooled lithium lead breeding blan…
2022
In the frame of the EUROfusion research activities devoted to the design of the DEMO breeding blanket (BB), the Water-Cooled Lithium-Lead BB (WCLL) concept is one of the candidates currently assessed in EU. To this end, an intense research campaign is ongoing to develop a robust geometric configuration for the WCLL BB Central Outboard Segment (COB). Since the current reference design of the WCLL COB segment is not mature enough to allow a full thermal-hydraulic assessment, an alternative procedure aimed at obtaining a thermal field for the whole segment without performing its complete thermal-hydraulic analysis is presented and applied in this work. The scope of the work is to obtain a ther…
Miti politici e attori collettivi. Orlando e lo spettacolo dell'antimafia
2022
From the 1980s to 2022, the role of mayor of Palermo is inextricably linked to the name of Leoluca Orlando. The hegemony of his political narrative is such that commissionerships and defeats are considered, in this period, mere parentheses in the history of the Municipality. In this contribution, we analyze the semantic device that, at the end of his first, glorious term as 'anti-mafia mayor', avoided Orlando’s discharge to be perceived as a defeat. A book-interview, in particular, had a strategic role in this resemantization. It’s a text by Michele Perriera (1988), journalist for L’Ora and theatre author, that operates a narrative shift of the political scene of Palermo from a fabulous to …
Rubens e Van Dyck a Zaventem: appunti su un aneddoto romantico
2022
The subject of the essay is Antoon van Dyck's stay in the small town of Zaventem, on the outskirts of Brussels, where the artist painted St Martin and the Pauper together with the image of a Madonna bearing - according to tradition - the features of the painter's lover. The anecdote of the love affair, which is said to have led to the delayed departure for Italy, is the subject of particular attention in the Romantic period, as theatrical plays, artist's novels and genre paintings show.
Parental Burnout Across the Globe During the COVID-19 Pandemic
2022
Abstract. The COVID-19 pandemic has affected all societies worldwide. The heightened levels of stress that accompanied the crisis were also expected to affect parenting in many families. Since it is known that high levels of stress in the parenting domain can lead to a condition that has severe consequences for health and well-being, we examined whether the prevalence of parental burnout in 26 countries (9,923 parents; 75% mothers; mean age 40) increased during COVID-19 compared to few years before the pandemic. In most (but not all) countries, analyses showed a significant increase in the prevalence of parental burnout during the pandemic. The results further revealed that next to governm…
Towards Process Centered Architecting for Quantum Software Systems
2022
Quantum Software Engineering (QSE) is a recent trend - focused on unifying the principles of quantum mechanics and practices of software engineering - to design, develop, validate, and evolve quantum age software systems and applications. Software architecture for quantum computing (a.k. a. quantum software architectures (QSA)) supports the design, development, and maintenance etc. phases of quantum software systems using architectural components and connectors. QSA can enable quantum software designers and developers to map the operations of Qubits to architectural components and connectors for implementing quantum software. This research aims to explore the role of QSAs by investigating (…
Challenges of the Covid-19 pandemic and design responses in public space: Towards strategies for resilient post-Covid cities
2022
The Covid-19 pandemic triggered governments and designers to revalue and redesign public spaces. This paper focuses on the various design responses to Covid-19 proposed and implemented in public spaces. In particular, we identify the kinds of challenges that such design responses address and the strategies that they use. We selected 56 design examples, largely collected from internet sources. By analyzing the design examples we identified five Covid-related challenges that were addressed in public space: sustaining amenities, keeping a distance, feeling connected, staying mentally healthy, and expanding health infrastructures. For each challenge, we articulated 2 to 6 design strategies. The…
EDITORIALE Servizio sociale nelle misure di contrasto alle povertà - introduzione al secondo numero
2022
Il tema della povertà e degli strumenti di sostegno di natura reddituale viene riproposto in questo numero della rivista il prosecuzione del precedente. L'accento è però posto sulle sperimentazioni che enti e istituzioni hanno avviato anche in forma autonoma o con l'ausilio del terzo settore. The theme of poverty and income support tools is re-proposed in this issue of the magazine as a continuation of the previous one. The emphasis, however, is placed on the experiments that bodies and institutions have also started autonomously or with the help of the third sector.
Effect of grape pomace from red cultivar 'Nero d’Avola' on the microbiological, physicochemical, phenolic profile and sensory aspects of ovine Vasted…
2022
Abstract Aims The purpose of this study was to functionalize an ovine stretched cheese belonging to 'Vastedda' typology with red grape pomace powder (GPP) of Nero d’Avola cultivar and to characterize the microbiological, physicochemical, phenolic profile and sensory characteristics of the final cheeses. Methods and Results Before cheeses production, GPP was characterized for its microbiological profile, antibacterial activity and polyphenolic content. No colonies of bacteria and yeasts were detected in the GPP. GPP showed a large inhibition spectrum against spoilage and pathogenic bacteria. Three classes of polyphenolic compounds belonging to flavan-3-ols, flavonol and phenolic acids were i…
A fog-assisted system to defend against Sybils in vehicular crowdsourcing
2022
Technological advancements in vehicular transportation systems have led to the growth of novel paradigms, in which vehicles and infrastructures collaborate to infer high-level knowledge about phenomena of interest. Vehicular Social Network (VSN) is one such paradigm in which vehicular network entities are considered as part of an Online Social Network (OSN), paving the way for new services derived from social context. Although vehicular crowdsourcing has tremendous benefits, its deployment in real systems requires to solve important challenges including defense against Sybil attacks. This paper proposes a novel fog-assisted system that uses SybilDriver to minimize the presence of Sybil enti…
MOLECULAR CHAPERONES IN HUMAN SALIVARY GLANDS: HSP90 A BIOMARKER IN HEALTH AND DISEASE
2022
Editorial Comment: LI-RADS Provides High Accuracy for Liver Transplant Eligibility in High-Risk Patients.
2022
Ornella Spataro, Sindacato di legittimità costituzionale e legalità penale
2022
This bibliographic sheet gives some indications on a book dedicated to the constitutional review and criminal legality in the delicate balance between legislative discretion and the role of the Constitutional Court
Una Praeparatio ad Missam Pontificalem miniata da Jacopo Ravaldi per l’arcivescovo Ausiàs Despuig ritrovata a Monreale. Prime considerazioni
2022
Il saggio presenta alla comunità scientifica un manoscritto miniato quattrocentesco del Tesoro della Cattedrale di Monreale già noto ad Angela Daneu Lattanzi e recentemente ritrovato, attribuendone la committenza al cardinale Ausias Despuig e la paternità al miniatore francese Jacopo Ravaldi attivo a Roma. The essay presents to the scholarly community a 15th-century illuminated manuscript from the Treasury of the Cathedral of Monreale already known to Angela Daneu Lattanzi and recently rediscovered, attributing its commission to Cardinal Ausias Despuig and its authorship to the French illuminator Jacopo Ravaldi active in Rome.
Force/Torque-Sensorless Joint Stiffness Estimation in Articulated Soft Robots
2022
Currently, the access to the knowledge of stiffness values is typically constrained to a-priori identified models or datasheet information, which either do not usually take into ac- count the full range of possible stiffness values or need extensive experiments. This work tackles the challenge of stiffness estimation in articulated soft manipulators, and it proposes an innovative solution adding value to the previous research by removing the necessity for force/torque sensors and generalizing to multi-degree- of-freedom robots. Built upon the theory of unknown input-state observers and recursive least-square algorithms, the solution is independent of the actuator model parameters and its in…
Palermo 2000–2020: Sicilian in Old and New Migrations
2022
This article will focus on the comparison between language attitudes and the status and functions of local dialect into migrant communities over the last twenty years. The first research started in the first years on the third Millennium and is being conducted (using narrative interview) within hundred young and adult migrants born in Palermo or residents in the city for years. In D’Agostino ( 2004, 2006, 2010), I suggested that very often the dialect was seen by migrants as a bridge thrown by the host society to favour their insertion, like “we code” shared by foreigners and natives who live in the same spaces within the city. It is been several years that the older migration has integrate…
Tralci d’argento: busti reliquari e paliotti in Sicilia tra Sei e Settecento
2022
Si indagano alcune opere in argento eseguite in Sicilia tra Sei e Settecento caratterizzate da simili repertori decorativi che, seguendo di volta in volta gli stilemi della pertinente temperie culturale, si rintracciano indistintamente sia sui manufatti d'arte figurative sia su intagli, statue, tessuti, gioielli, utensili e suppellettili liturgiche. Nello specifico sono indagati, per la prima volta, il busto reliquiario di Santa Rosalia della Matrice di Santa Margherita Belìce (Ag) e il paliotto architettonico della Chiesa Madre di Naro (Ag) Some silver works made in Sicily between the seventeenth and eighteenth centuries are investigated, characterized by similar decorative repertoires whi…
Questioni in tema di istituzione di erede ex re certa
2022
Il contributo affronta taluni nodi problematici dell’attribuzione da parte del testatore di uno o più beni come quota del patrimonio ereditario: l’individuazione dei criteri che orientano l’interprete nel qualificare la disposizione come legato o come institutio ex re certa; la verifica di una sovrapposizione o meno di una siffatta volontà testamentaria con la divisione compiuta dal testatore; l’accertamento di quale sia la sorte dei beni ignorati al momento del lascito, o sopravvenuti rispetto ad esso, e della caduta o della permanenza dell’istituzione ex re certa nel caso in cui il testatore, prima dell’apertura della successione, abbia alienato o trasformato il bene attribuito o quest’ul…
Introduction : language, work and affective capitalism
2022
Abstract This special issue contributes to scholarship on language and affective economy by exploring the role played by affect in shaping work and workers under current configurations of capitalism. We take as a starting point the observation of increased valorisation and instrumentalisation of affect in the contemporary phase of capitalism. In this editorial introduction to the special issue, we set the scene by first outlining our questions, aims and objectives. Subsequently, we situate the contribution made by this issue in a larger social theorisation of affect and capitalism, particularly the notion of affective capitalism, and reflect on how this theorisation can contribute to sociol…