138,861 research outputs found
Uncovering quasi-degenerate Kaluza-Klein Electro-Weak gauge bosons with top asymmetries at the LHC
No full textBy exploiting the correlation between charge and spin polarisation asymmetries in t-tbar, we show that combining the two observables could identify the presence of quasi-degenerate states in a resonant signal at the LHC. As an example, we investigate experimental signatures emerging in top-antitop final states in the context of a model where the Standard Model Electro-Weak sector is allowed to propagate in large extra--dimensions of TeV-1 size while the colour sector is localised. Assuming current experimental constraints from the 7 and 8 TeV runs and taking into account the estimated top (anti-top) reconstruction efficiencies, we find that the 14 TeV upgraded LHC with the planned integrated luminosity L=100 fb-1 could access these quasi-degenerate multiple resonances and explore for the first time the rich phenomenology in the asymmetry observables. The main outcome would be having measurable quantities, complementary to the usual total and differential cross sections, capable of distinguishing a quasi-degenerate multiply resonant spectrum from a 'standard' single resonance that could present a similar signal in a bump hunt analysis
le ville di Moretti
No full textLa produzione di Moretti sul tema delle ville in una ricognizione esaustiva che va dalle prime case private degli anni trenta sino alla casa Moresca a santa marinella incompiuta
Models for silicate melts viscosity
No full textD. Giordano (1,2), J.K. Russell (2), R. Moretti (3), A. Mangiacapra (3,4), M.
Potuzàk (4), C. Romano (1) & D.B. Dingwell (4
Introduzione ad AWDA 2
No full textIl progetto di AWDA, Aiap Women in Design Award, ha una storia lunga e radici profonde, nasce nel 2009 da un’idea di Laura Moretti, si configura nel 2012 come Premio biennale a cura di Cinzia Ferrara, Daniela Piscitelli e Laura Moretti, diventa nel 2015 internazionale e si prepara ad assumere una dimensione mondiale con la terza edizione del 2017 includendo nella curatela anche Carla Palladino. L’intento del progetto, che affronta un tema importante e ancora poco indagato come quello del design della comunicazione visiva declinato al femminile, non è quello di esaminare un’area protetta, o ricercare peculiarità che caratterizzano una metodologia di progetto al femminile, quanto quello di attraversare un territorio scoprendone le diversità in ogni lembo, date da profonde differenze che derivano dalle diversità di provenienze geografiche, formazioni, committenze pubbliche e private, tessuti sociali nei quali le designer vivono e lavorano.AWDA, Aiap Women in Design Award, has a long history and deep roots: in 2009 it was only Laura Moretti’s idea, in 2012 it took shape as a biennial Award curated by Cinzia Ferrara, Daniela Piscitelli and Laura Moretti, in 2015 it became international – the first step towards the worldwide dimension it would achieve in its third edition, 2017, when Carla Palladino joined the team of curators. The aim of the project, which tackles the important, though still under-explored theme of visual communication design from the perspective of women, is not to examine a protected area, or to search for peculiarities characterising women’s design methodology, but rather to travel across a territory, trying to discover its diversity at every step, by identifying a number of differences resulting from different geographical and educational backgrounds, private or public clients, social contexts in which the designers live and work
Modeling of the interplay of fO2 and fS2 along the FeS-Silicate Melt equilibrium.
No full textIn this paper we will discuss a simplified thermodynamic description for the saturation of FeS, either liquid or
solid, in magmatic melts. The Conjugated-Toop–Samis–Flood–Grjotheim model [Moretti R. and Ottonello G.,
2005. Solubility and speciation of sulfur in silicate melts, the Conjugated-Toop–Samis–Flood–Grjotheim (CTSFG)
model. Geochimica et Cosmochimica Acta, 69, 801–823] has furnished the theoretical reference frame, since it
already accounts for the solubility of gaseous sulfur and the speciation and oxidation state of sulfur in silicate
melts. We provide a new model to predict the saturation of magmatic silicate melts with an FeS phase that is
internally consistent with these previous parameterizations. The derived model provides an effective sulfogeobarometer,
which is superior with respect to previous models. For magmas rising from depth to surface, our
appraisal of molar volumes of sulfur-bearing species in silicate melts allows us to model oxidation–reduction
processes at different pressures, and sulfur concentrations for saturationwith either liquid or solid phases. In this
respect, the nature of the oxygen fugacity buffer is critical. On the basis of model results on some typical
compositions of volcanological interest, the sulfur contents at sulfide saturation (SCSS) have been calculated and
the results duplicate the experimental observations that the SCSS is positively correlatedwith pressure forwatersaturated
acidic melts and negatively correlated with pressure for water-poor basaltic melts. This new model
provides fO2–fS2 pairs of FeS saturation of natural silicatemelts. In caseswhere the redox constraint is lacking, the
model can be used to investigate whether the dissolved sulfur content approaches SCSS or not, and if so, to
estimate at which fO2 value the silicate melt is saturated with a sulfide phase
Terremoto in Emilia Romagna (2012): le attività del Centro Operativo Emergenza Sismica
No full textCome definito negli accordi riportati nell’ambito della Convenzione1 esistente tra l’Istituto Nazionale di Geofisica e Vulcanologia (INGV) e il Dipartimento di Protezione Civile (DPC), a poche ore dal forte terremoto che nella notte del 20 maggio 2012 ha colpito una vasta area dell’Emilia [Moretti et al., 2012; 2013a], è stato attivato il Pronto Intervento Sismico dell’INGV [Govoni et al., 2008; Moretti e Govoni, 2011; Moretti et al., 2010c]. Durante la prima settimana dell’emergenza l’obiettivo principale della struttura emergenziale INGV ha riguardato il miglioramento del monitoraggio sismico; sono state quindi attivate le reti sismiche mobili [maggiori dettagli in Moretti et al., 2012; 2013a] con il fine di integrare le stazioni permanenti della Rete Sismica Nazionale [RSN, Amato e Mele, 2008; Delladio et al., 2011].
Solo in una secondo momento, dopo circa 10 giorni dall’inizio della sequenza sismica è stato ufficialmente attivato il Centro Operativo Emergenza Sismica [COES, Moretti et al., 2010a], a seguito del decreto del Capo del DPC, con il quale è stata costituita la Direzione di Comando e Controllo (Di.Coma.C.2) presso l’Agenzia della Protezione Civile Regionale dell’Emilia Romagna (AgDPC) in Bologna. L’allestimento e il coordinamento del COES sono stati realizzati grazie alla collaborazione tra il Centro Nazionale Terremoti (CNT), a cui afferisce la struttura, e la Sezione INGV di Bologna, sita nel capoluogo della regione colpita dall’emergenza.
In questo lavoro saranno descritte le modalità, le tempistiche e l’impegno di personale che hanno permesso e garantito l'attivazione e il buon funzionamento del COES.Published1-381.1. TTC - Monitoraggio sismico del territorio nazionaleN/A or not JCRope
Ionization and speciation of water in silicate melts
No full textWater in silicate melts is commonly assumed to take the form of molecular water (H2Om) and hydroxyl groups (OH), the latter bounded to network formers (T) as T-OH groups. Although free hydroxyls (OH-) were only recently ascertained in depolymerized melts (Xue and Kanzaki, 2004), the amphoteric behavior of water, was already suggested long ago (Fraser, 1977) and preliminarily modelled considering redox data (Moretti, 2005). However, autoprotolysis of water has not been assessed in silicate melts hitherto, because of the rather complex nature of such a solvent. Here, a simple theoretical frame is developed based on the extended two-sublattice hypothesis of Temkin. The theory accounts for acid-base properties of the melt phase, and reconciles differing notations. An independent proof of our appraisal is given by an algorithmic approach to chemical equilibria between O and H in polymeric silicate melts. The assessment of the ionization constant of water in melts can explain the conditions at which precipitation of hydrous minerals can occur. Because of the amphoteric behavior, melt polymerization can be affected less than that normally perceived and assumed, depending on bulk composition. This has implications for the redox behavior, which is strictly connected to melt acid-base properties, hence polymerization. These connections must be accounted for when modelling magmatic equilibria.
REFERENCES:
FRASER DG (1977) In: Thermodynamics in Geology (D.G. Fraser, ed.), D. Reidel Pub. Co.
MORETTI R. (2005) Ann. Geophysics, 48, 503-608.
XUE, X. AND KANZAKI, M. (2004) Geochim. Cosmochim. Acta, 68, 5027-5057
Contesti territoriali e reti tra organizzazioni museali: cooperazione e processi di valorizzazione
No full text- …
