221 research outputs found
Le donne di X’oyep : Fotografia, storia, memoria
No full textUscito in Messico nel 2013, Las mujeres de X’oyep di Alberto del Castillo Troncoso propone un’incisiva analisi storico-culturale di una potente fotografia di Pedro Valtierra, scattata all’inizio del 1998 nel Chiapas della resistenza indigena e zapatista. A ormai quasi trent’anni dal levantamiento dell’EZLN (1994), l’edizione italiana si presenta arricchita di nuove piste di ricerca a cura dell’autore, contraddistinguendosi, nell’ambito delle traduzioni internazionali del libro, per la scelta di una formula corale. Il dialogo tra Alberto del Castillo Troncoso, Maria Matilde Benzoni, Massimo De Giuseppe e Simone Ferrari che ne attraversa le pagine invita in effetti il lettore a intrecciare le prospettive di questa importante ricerca con i temi trattati negli altri testi pubblicati all’interno del volume: la diffusione e le traiettorie della fotografia in Messico (secoli XIX-XXI), le radici storiche della crisi in Chiapas, il prisma delle espressioni di attenzione e partecipazione verso tale orizzonte “glocale” maturate in Italia dalla fine del Novecento a oggi.Las mujeres de X’oyep (Mexico, 2013) by Alberto del Castillo Troncoso provides an incisive historical and cultural analysis of a powerful photograph by Pedro Valtierra taken in early 1998 in the Chiapas of indigenous and Zapatista resistance. Almost thirty years after the levantamiento of the EZLN (1994), the Italian edition of the research contains additional approaches by the author, standing out among international translations of the book due to the choice to interweave the perspectives of this study with the themes addressed in the other essays published in the volume. We refer to the diffusion and trajectories of photography in Mexico (19th-20th centuries) (Maria Matilde Benzoni-Alberto del Castillo Troncoso), the historical roots of the crisis in Chiapas (Massimo De Giuseppe), and the prism of expressions of attention and participation toward this glocal horizon that has matured in Italy from the late 20th century to the present (Simone Ferrari).Las mujeres de X'oyep (México, 2013) de Alberto del Castillo Troncoso propone un contundente análisis histórico-cultural de una impactante fotografía de Pedro Valtierra, realizada a principios de 1998 en el Chiapas de la resistencia indígena y zapatista. Casi treinta años después del levantamiento del EZLN (1994), la edición italiana se presenta enriquecida con nuevas perspectivas de investigación por parte del autor, destacándose, entre las traducciones internacionales del libro, por la elección de una fórmula coral. El diálogo entre Alberto del Castillo Troncoso, Maria Matilde Benzoni, Massimo De Giuseppe y Simone Ferrari invita al lector a entrelazar los puntos de vista de esta importante investigación con los temas tratados en otros textos incluidos en el volumen: la difusión y las trayectorias de la fotografía en México (siglos XIX-XX), las raíces históricas de la crisis en Chiapas, el prisma de la participación y las expresiones de atención hacia este horizonte "glocal" maduradas en Italia desde finales del siglo XX hasta nuestros días
Fo, Ruzante e il mito della "lingua composita"
No full textLuca D’Onghia shows how Dario Fo recreates and rewrites Ruzante’s work
Fo, Ruzante e il mito della "lingua composita"
No full textLuca D’Onghia shows how Dario Fo recreates and rewrites Ruzante’s works
Stochastic volatility
No full textGiven the importance of return volatility on a number of practical financial management decisions, the efforts to provide good real- time estimates and forecasts of current and future volatility have been extensive. The main framework used in this context involves stochastic volatility models. In a broad sense, this model class includes GARCH, but we focus on a narrower set of specifications in which volatility follows its own random process, as is common in models originating within financial economics. The distinguishing feature of these specifications is that volatility, being inherently unobservable and subject to independent random shocks, is not measurable with respect to observable information. In what follows, we refer to these models as genuine stochastic volatility models. Much modern asset pricing theory is built on continuous- time models. The natural concept of volatility within this setting is that of genuine stochastic volatility. For example, stochastic-volatility (jump-) diffusions have provided a useful tool for a wide range of applications, including the pricing of options and other derivatives, the modeling of the term structure of risk-free interest rates, and the pricing of foreign currencies and defaultable bonds. The increased use of intraday transaction data for construction of so-called realized volatility measures provides additional impetus for considering genuine stochastic volatility models. As we demonstrate below, the realized volatility approach is closely associated with the continuous-time stochastic volatility framework of financial economics. There are some unique challenges in dealing with genuine stochastic volatility models. For example, volatility is truly latent and this feature complicates estimation and inference. Further, the presence of an additional state variable - volatility - renders the model less tractable from an analytic perspective. We examine how such challenges have been addressed through development of new estimation methods and imposition of model restrictions allowing for closed-form solutions while remaining consistent with the dominant empirical features of the data.Stochastic analysis
Realized volatility
No full textRealized volatility is a nonparametric ex-post estimate of the return variation. The most obvious realized volatility measure is the sum of finely-sampled squared return realizations over a fixed time interval. In a frictionless market the estimate achieves consistency for the underlying quadratic return variation when returns are sampled at increasingly higher frequency. We begin with an account of how and why the procedure works in a simplified setting and then extend the discussion to a more general framework. Along the way we clarify how the realized volatility and quadratic return variation relate to the more commonly applied concept of conditional return variance. We then review a set of related and useful notions of return variation along with practical measurement issues (e.g., discretization error and microstructure noise) before briefly touching on the existing empirical applications.Stochastic analysis
Investing over the life cycle with long-run labor income risk
No full textMany financial advisors and much of the academic literature often argue that young people should place most of their savings in stocks. In contrast, a significant fraction of U.S. households do not hold stocks. Investors typically hold very little in stocks when they are young, progressively increase their holdings as they age, and decrease their exposure to stock market risk when they approach retirement. The authors show how long-run labor income risk helps explain this evidence. Moreover, they discuss the effect of long-run labor income risk on the valuation of pension plan obligations, their funding, and the allocation of pension assets across different investment classes.Income ; Stock market ; Labor market ; Wages
Chiuse poetiche e senso della fine. Spunti per una tipologia
No full textRicordata la sfuggente polisemia del concetto di fine, lo studio (che privilegia l'analisi delle strutture formali, con rilievi di stilistica e metrica) tratta due questioni di carattere generale: quando un testo possa dirsi compiuto e cosa rafforzi una chiusa. Dapprima viene fissata, anche attraverso un'analisi contrastiva, la differenza tra compiutezza e scarto conclusivo, tra effetti di saturazione ed effetti più propriamente clausolari; quindi vengono definite, cercando di valutarne la portata, alcune tra le principali tecniche di intensificazione della chiusa poetica; tecniche sostanzialmente riconducibili a tre ordini di fenomeni: 1) chiuse intensificate da sottolineature tematiche e suggestioni iconiche; 2) chiuse scandite attraverso figure di ricorrenza e variazione; 3) chiuse rilevate da una strategica distribuzione delle informazioni, attraverso dinamiche di attesa e sorpresa, di tensione e soluzione. La varia casistica è illustrata con esempi tratti principalmente, ma non solo, dalla letteratura italiana (e in particolare dalla poesia del Novecento), senza però circoscrivere preliminarmente un corpus omogeneo, coll'intento di mettere in luce come meccanismi conclusivi analoghi ritornino in testi diversissimi per genere ed epoca.Reviewing the ever-fugitive concept of fine, the study (which prioritises the analysis of formal structures, with particular emphasis being given to stylistics and metrics) deals with two questions of a general character: when can a text can be said to be complete, and what elements reinforce a closure? First, also through contrastive analysis, the article sets out the difference between completion and discarded conclusion, between effects of saturation and effects that more properly form part of closure. Thus the author, in an effort to evaluate the scope of this, defines some of the main techniques of the intensification of poetic closure, techniques that are substantially aimed at analysing three types of phenomenon: 1) closures that intensify thematic emphasis and iconic suggestion; 2) closures articulated through figures of recurrence and variation; 3) closures that highlight a strategic distribution of information, through the dynamics of expectation and surprise, of tension and solution. The various types are illustrated with examples taken largely, though not exclusively, from Italian literature (and, in particular, the poetry of the Novecento), without, however, circumscribing an essentially homogenous corpus. The intention is to shed light on the ways in which analogous mechanisms of conclusion recur in the most diverse of texts, throughout different genres and periods
Phage displayed peptides/antibodies recognizing growth factors and their tyrosine kinase receptors as tools for anti-cancer therapeutics.
No full textThe basic idea of displaying peptides on a phage, introduced by George P. Smith in 1985, was greatly developed and improved by McCafferty and colleagues at the MRC Laboratory of Molecular Biology and, later, by Barbas and colleagues at the Scripps Research Institute. Their approach was dedicated to building a system for the production of antibodies, similar to a naïve B cell repertoire, in order to by-pass the standard hybridoma technology that requires animal immunization. Both groups merged the phage display technology with an antibody library to obtain a huge number of phage variants, each of them carrying a specific antibody ready to bind its target molecule, allowing, later on, rare phage (one in a million) to be isolated by affinity chromatography. Here, we will briefly review the basis of the technology and the therapeutic application of phage-derived bioactive molecules when addressed against key players in tumor development and progression: growth factors and their tyrosine kinase receptors
A venti anni dal Nobel. Atti del convegno su Dario Fo (Pavia, Collegio Ghislieri, 23-24 maggio 2017)
No full textIl volume raccoglie dieci saggi che affrontano l’opera letteraria e teatrale di Dario Fo da angolature diverse: considerando sia le specificità stilistiche dei suoi testi, sia le strategie recitative di cui si è servito.
Sul versante letterario, Luca D’Onghia mostra come Fo ami evocare Ruzante, citandolo in forme anche liberamente ricreative; Pietro Trifone analizza la lingua di "Aveva due pistole con gli occhi bianchi e neri"; Angelo Romano riflette sulle rivisitazioni della maschera di Arlecchino; Stefania Stefanelli fornisce un inquadramento sociolinguistico all’uso di dialetto e italiano.
In ambito teatrale, Eva Marinai illustra le strategie mimiche di Fo, dalla bande mimée di Jacques Lecoq al sermo corporis di "Mistero buffo"; Marisa Pizza evidenzia la dimensione militante delle rappresentazioni di Fo e come Franca Rame ne abbia documentato le fasi; Marco De Marinis indaga la dimensione drammaturgica e registica dell’arte attoriale di Fo; Paolo Puppa individua gli aspetti dei monologhi di Fo poi presenti anche nel teatro di narrazione; Simone Soriani sviluppa un confronto tra Fo e Petrolini; Roberto Cuppone, infine, studia la nascita del giullare e della sua lingua 'infernale'
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