1,160 research outputs found
Above and below equator
No full textThe conception of Global North is referring, from geographical point of view to the Northern Hemisphere located above the Equator and the Global South, but the expres-sion is more used to describe a grouping of countries along socio-economic and political charac-teristics. The namely the part of the earth below the Equator is transforming more and more. Major dynamics of historical, post and new colonisation, greater economic discrepancy, politics power and subsequent accessibility to resources have created and engendered throughout the years the geographical difference. These phenomena inevitably lead to different approaches in spatial planning, territorial governance and particularly, in emergency assessment. This paper illustrates two different approaches to deal with natural hazards that occurred, one in the Global South, specifically the 2019 Tropical Cyclone Idai in the central area of Mozambique, along with the 2016 massive earthquake that took place mainly in the city of Amatrice in the central region of Lazio (Italy). This study seeks to investigate both hazardous events in their overall occurrence, focusing on the undertaken emergency approaches and the variety of diffi-culties encountered along these two challenging processes of recovery: geographical and geo-morphological intrinsic features - the presence of the Indian Ocean and the configuration of the Mozambican country, so as the disposition of the Italian country over the Eurasian and African plate, resulting in a consistent number of faults throughout Italy -, multi-level approach of administrative sectors, legal framework and community awareness. This parallel discussion will eventually highlight the need to improve communities and professionals’ preparedness, learn from previous mistakes, capacity building and raise awareness towards more conscious, fairer strategies to tackle emergencies. To this end, the main advantages identified in the BIM technol-ogy that could make major changes in this field, are certainly interoperability and the possibility of simulating the work process in a virtual way, using a constantly updated template. These and other innovative aspects will be discussed and analysed
Giulia Veronica Varisco
No full textThe headword explains the biography and the contribution of the author Giulia Varisco to the children's literatur
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
Caratterizzazione della microflora degradativa di salsiccia fresca
No full textLa salsiccia fresca è un prodotto costituito da carne macinata, grasso suino, spezie, acqua, sale e zuccheri in bassa percentuale, con una rilevante importanza economica sul mercato nazionale ma per il quale, viste le caratteristiche compositive, la limitata shelf-life costituisce un limite per la commercializzazione. Essa dipende essenzialmente dai microrganismi presenti nella materia prima e, per poter arrivare all’applicazione di diverse strategie atte ad incrementare la shelf-life del prodotto e a controllare l’evoluzione di questa microflora, sono indispensabili dati più precisi circa il microbiota che caratterizza i processi degradativi.
Questo elaborato si inserisce in un più ampio progetto per la valutazione di questi aspetti ed è focalizzato sull’evoluzione del microbiota in diversi lotti prodotti industrialmente e conservati a temperature di 4°C e in abuso termico. Lo studio effettuato con tecniche microbiologiche convenzionali, tecniche analitiche mirate ad aspetti compositivi e studi metatassonomici ha consentito una buona definizione della variabilità che caratterizza il microbiota degradativo delle salsicce fresche poiché ciascun lotto era caratterizzato da un proprio pattern degradativo. In tutti i lotti però (tranne uno) esistono alcune popolazioni prevalenti quali L. sakei, Leuconostoc e B. thermosphacta. Un unico lotto presentava un pattern degradativo difforme dagli altri con le specie dominanti riconducibili alle Enterobacteriaceae.
Questo elaborato ha consentito di chiarire meglio quello che è la potenziale evoluzione del microbiota delle salsicce fresche in rapporto alla loro shelf-life. I risultati hanno mostrato una certa variabilità all’interno di un pattern abbastanza definito, ma hanno anche evidenziato la possibilità di eventi non controllati che alterano in maniera significativa (e potenzialmente rischiosa) questo pattern
For the poetics of deterritorialization: melancholy and environmental estrangement in "Tierra fresca de su tumba" by Giovanna Rivero
No full textreservedEl siguiente análisis de la obra "Tierra fresca de su tumba" de Giovanna Rivero se pone como objetivo el de recorrer en detalle los seis cuentos del libro, subrayando caso por caso la poética de la desterritorialización, la melancolía y el extrañamiento ambiental que la autora pone en práctica a lo largo de la obra. Todos los personajes que encontramos, de hecho, a lo largo del libro, tienen un elemento en común: por un motivo o por otro, todos se encuentran en una condición de extranjería. Veremos como al final estas individualidades tan desterritorializadas parecen encontrar en estos lugares un reconocimiento otro y una pertenencia llegando por fin a "sentirse en casa"
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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
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
Il comparto suinicolo in Europa e in Italia e le motivazioni del progetto di qualificazione genetica della Regione Friuli Venezia Giulia.
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