1,150 research outputs found
Giulia Veronica Varisco
No full textThe headword explains the biography and the contribution of the author Giulia Varisco to the children's literatur
Evaluation of the Efficacy of Low-Particle-Size Toothpastes against Extrinsic Pigmentations: A Randomized Controlled Clinical Trial
No full textStain-removing domiciliary protocols are focused on the elimination of dental extrinsic pigmentations by the application of abrasive toothpastes, extensively available in commerce. The goal of the present study is to evaluate the efficacy of two different stain removal molecule-formulated toothpastes by the reduction of clinical parameters: the micro-cleaning crystals and activated charcoal. A total of 40 participants with extrinsic dental pigmentations were enrolled and divided into two groups: a Control group, assigned to a toothpaste with micro-cleaning crystals (Colgate Sensation White); and a Trial group, with microparticle-activated charcoal toothpaste (Coswell Blanx Black). At T0 (baseline), T1 (10 days), T2 (1 month), and T3 (3 months), clinical parameters, including Lobene stain index calculated for intensity and extension, plaque control record, and bleeding on probing, were measured. Statistically significant differences were found in both groups (p < 0.05): a reduction of extrinsic pigmentation, both in intensity and extension, was obtained in the Control group, but their total elimination could be achieved only in the Trial group with the activated charcoal molecule, though without significant difference between the groups (p > 0.05). No intergroup differences were found for each timeframe for PCR, BoP, LSI-I, and LSI-E. Both tested toothpastes can be recommended for domiciliary oral hygiene of patients with extrinsic pigmentations
Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure
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Ytterbium Disilicate/Monosilicate Multilayer Environmental Barrier Coatings: Influence of Atmospheric Plasma Spray Parameters on Composition and Microstructure
by Giulia Di Iorio,Laura Paglia *ORCID,Giulia PedrizzettiORCID,Virgilio GenovaORCID,Francesco MarraORCID,Cecilia BartuliORCID andGiovanni PulciORCID
INSTM Reference Laboratory for Materials and Surface Engineering, Sapienza University of Rome, Eudossiana 18, 00184 Rome, Italy
*
Author to whom correspondence should be addressed.
Coatings 2023, 13(9), 1602; https://doi.org/10.3390/coatings13091602
Original submission received: 10 August 2023 / Revised: 31 August 2023 / Accepted: 11 September 2023 / Published: 13 September 2023
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Abstract
SiC/SiC ceramic matrix composites (SiCf/SiC CMCs) are regarded as the new materials for the hot-section components of aircraft gas turbine engines, since they have one-third of the density of metallic superalloys, a higher temperature capability, good mechanical strength, and excellent thermal shock resistance. However, high-temperature water-vapor-rich combustion gases can induce severe surface recession phenomena in SiC/SiC leading to component failure. For this reason, it is necessary to design protective coatings, i.e., environmental barrier coatings (EBCs), able to protect the SiC/SiC surface in combustion environments. In the present work, ytterbium monosilicate (Yb2SiO5), stable when exposed to water vapor at high temperatures, and ytterbium disilicate (Yb2Si2O7), characterized by a thermal expansion coefficient closer to that of the substrate, were selected for a multilayer EBC system. EBCs were processed using the atmospheric plasma spray (APS) technique. A set of deposition parameters were tested, varying the power of the torch, and the composition and microstructure of the deposited coatings were studied in terms of porosity, crack density, and post-deposition phase retention by performing SEM, EDS, and XRD analysis. The results allow for the definition of the influence of deposition parameters on the final properties of multilayer EBC coatings
Correction to: Safety and Psychological Outcomes of Tandem t:Slim X2 Insulin Pump with Control-IQ Technology in Children, Adolescents, and Young Adults with Type 1 Diabetes: A Systematic Review
No full textThe second author name was incorrectly published as Giula Maria Smylie. The correct name is Giulia Marie Smylie. The original article has been corrected
Scrivere senza anestesia. La chiarezza di Giulia Niccolai
No full textIl saggio colloca storicamente la narratrice e poetessa Giulia Niccolai nel canone del Novecento letterario italiano discutendone poetica e cifre stilistiche. L'ampia analisi proposta tocca tutte le opere dell'autrice evidenziandone i legami intertestuali, anche tra poesia e narrativa, e i progressivi sviluppi in un arco cronologico esteso, tra anni Sessanta e primi anni Duemila. Lo studio coglie anche l'importanza dei riferimenti alle arti visive, in particolare alla fotografia, che Giulia Niccolai ha praticato in prima persona negli anni della Neoavanguardia, e alla pittura americana.The essay places the narrator and poet Giulia Niccolai in the canonical twentieth century Italian literary discussing her poetics and stylistic figures. The wide analysis proposed touches all the works of the author highlighting the intertextual links, also between poetry and narrative, and the progressive developments in an extended chronological period, between the Sixties and early Twenties. The study also captures the importance of references to the visual arts, especially photography, which Giulia Niccolai has practiced in the years of the Neo-avant-garde, and to American painting
The role of working memory in Specific Learning Disabilities: evidence and perspectives
No full textopenLa presente tesi si propone di analizzare il ruolo della memoria di lavoro (MdL) nei Disturbi Specifici dell’Apprendimento (DSA), con particolare attenzione alla sua influenza sulle abilità di lettura, scrittura e calcolo. Dopo una prima parte introduttiva dedicata alla definizione di MdL e dei suoi modelli teorici, viene approfondito il legame tra deficit nei meccanismi di memoria e le difficoltà scolastiche tipiche dei DSA, attraverso l’analisi della letteratura scientifica recente. Il secondo capitolo esamina le differenze nei profili cognitivi di bambini con dislessia, discalculia e altri disturbi specifici, evidenziando il ruolo discriminante della MdL nelle diverse manifestazioni cliniche. Infine, il lavoro si concentra su interventi e strategie riabilitative, compensative e tecnologiche volte a potenziare la memoria di lavoro, migliorando così l’apprendimento e l’autonomia degli studenti con DSA. I risultati della revisione evidenziano l’importanza di un approccio personalizzato e multidimensionale nel trattamento dei DSA.This thesis aims to analyze the role of working memory (WM) in Specific Learning Disabilities (SLD), with particular focus on its influence on reading, writing, and mathematical skills. Following an introductory section that defines WM and its theoretical models, the paper explores the connection between memory deficits and the academic difficulties typical of SLD, based on recent scientific literature. The second chapter examines cognitive profile differences among children with dyslexia, dyscalculia, and other specific disorders, highlighting the discriminative role of WM across various clinical presentations. Finally, the thesis focuses on interventions and strategies—rehabilitative, compensatory, and technological—designed to strengthen working memory and, consequently, improve learning outcomes and independence in students with SLD. The review’s findings underscore the importance of a personalized and multidimensional approach in the treatment of SLD
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L'afrofuturismo tra Stati Uniti e Italia. Dalla memoria storica ai viaggi intergalattici per re-immaginare futuri postumani
No full textIn this article the author explores the cultural movement called Afrofuturism, tracing its origins, features, simbology, and its historical and political meanings. Starting from the (supposed) discoursive gap between African and African American people on one side and technology and science fiction on the other, this paradigm addresses themes related to the intersection of African Diaspora and African cultures with technology and science fiction, with the aim to recover the history of slavery and racism through the projections into alternative space-time contexts. In particular, the author explores the feminist afrofuturism perspective in order to examine the specific oppression and cultural production of African and African American women. In doing so, the author analyzes the development of afrofuturism in Italy, focusing on the work of the singer and beatmaker Karima 2G
Effects of cognitive training on attentional skills in a group of healthy elderly people
No full textopenL’aspettativa di vita nell’ultimo secolo è aumentata notevolmente, per questo ora i ricercatori si stanno focalizzando su come promuovere un invecchiamento attivo, sia dal punto di vista fisico che cognitivo. Gli studi si concentrano sull’analisi delle zone che si deteriorano con l’invecchiamento e su come potenziare le funzioni cognitive. Questa ricerca intende approfondire gli effetti di un training cognitivo computerizzato su anziani sani, senza patologie neurodegenerative. Il training si focalizza sulle funzioni attentive (attenzione selettiva, divisa e alternata) e consiste di 8 sessioni di training dalla durata di 40 minuti ciascuna per un periodo di 4 settimane, effettuate al computer attraverso il programma MS-rehab. Sono state effettuate delle valutazioni cognitive prima e dopo il training che hanno permesso di analizzare gli effetti del training. Dall'analisi fatta con il metodo ANOVA a misure ripetute sono risultati significativi i punteggi del Digit San Forward e del Listening San Test, ottenuti dal confronto tra gruppo di controllo e sperimentale. I risultati sono incoraggianti, ma va considerato un limite: il campione è troppo piccolo (20 partecipanti), quindi i risultati non possono essere ritenuti affidabili e generalizzabili
BDC-Decomposition for global influence analysis
No full textIn biochemical networks, the steady-state input-output influence is the sign of the output steady-state variation due to a persistent positive input perturbation; if the sign does not depend on the value of the strictly positive system parameters, the influence is structural. As recently shown for small perturbations, when the linearized system approximation is valid, steady-state input-output influences can be structurally assessed, for biochemical networks with m unknown parameters, by means of a vertex algorithm with complexity 2m. This letter shows that the structural input-output influence of a biochemical network is a global property, which does not require any small-perturbation assumption. It also shows that, using a new algorithm, the complexity can be reduced down to 2m-n , where n is the system order, thus drastically reducing the computation time. Finally, when the uncertain parameters belong to known intervals, non-conservative bounds are given for the steady-state ratio between output and input, allowing for sensitivity analysis.Accepted Author ManuscriptTeam Tamas Keviczk
Luoghi di danza
No full textWriter, journalist, theater and film critic, Marco Ramperti is one of the few that deals with dance in the Italian press of the fascist period. For the newspaper «La Stampa», between 1926 and 1928, he edits the column Luoghi di danza (dance venues), dedicated to ballroom and modern dances. The article investigates the performative nature of Ramperti’s writing, dominated by “staging” devices of the subject matter, as well as by an intrusive presence of the body, first of all that of the author. What emerges is an unprecedented image of the dance in the Twenties, at the same time catalysing the most alienating - and Pirandellian - aspects of modernity, but also a place where genuinely experiencing themselves and the others
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