Search results for "passage"

Analysis of random walks on a hexagonal lattice

2019

We consider a discrete-time random walk on the nodes of an unbounded hexagonal lattice. We determine the probability generating functions, the transition probabilities and the relevant moments. The convergence of the stochastic process to a 2-dimensional Brownian motion is also discussed. Furthermore, we obtain some results on its asymptotic behavior making use of large deviation theory. Finally, we investigate the first-passage-time problem of the random walk through a vertical straight-line. Under suitable symmetry assumptions we are able to determine the first-passage-time probabilities in a closed form, which deserve interest in applied fields.

Ethnography on tourist spaces

2017

Tourism-related research, despite the great number of books and studies, seems to face one of its worst epistemological crises. At some extent, scholars have serious difficulties to define what tourism means. Though anthropology was the discipline more prone to tourism, as it is, a rite of passage, the current state of indiscipline claimed by Tribe, de Escalona and Korstanje as well as the autonomy of an international academy is more oriented to marketing than to science, are some of the problems tourism research faces today (Tribe, 1997, 2010; Korstanje, 2010; de Escalona, 2015). In this difficult context, Nogues Pedregal provides readers with a masterful ethnography which serves to interp…

Gender and the gynecological examination: women's identities in doctors' narratives.

2007

The authors explore the constructions of gender in male doctors' narratives of gynecological examinations. Focusing on the ways in which gender identities are constructed in the stories of the medical encounter, they argue, first, that gender is more flexible during the visit with a gynecologist than has been suggested. Gendered identities are assumed and put aside as the interaction progresses, with its final stage—the pelvic examination—being constructed with gender removed. Second, they argue that undressing is invested with a special status during the examination. It is a gendered rite of passage between the two different ungendered subject positions of the doctor and the patient. They …

Genèse et création du réalisme mythologique de Michel Butor

2023

Si La Modification est le roman où le mythe s’incorpore au réel, le premier roman de Butor nous permet de comprendre le processus par lequel cette conjonction s’est imposée. Il s’agira d’une part de démontrer la fonction que Passage de Milan joue dans l’affirmation des principes stylistiques de l’écriture butorienne, et, d’autre part, de laisser entrevoir à travers une analyse génétique les transformations du texte qui ont permis de renouveler la représentation du réel et d’aboutir à un système d’échos intertextuels capable de faire dialoguer les romans butoriens entre eux.

I ricordi figurati: «foto di famiglia» in Sicilia

2006

Today we are witnessing the increasingly insistent formation of visual stereotypes. The continuous repetition of these modules, used in similar situations, makes it easier to interpret them, so much so that they can now be considered elements of a common language: a figurative language to be investigated in the context of the anthropology of visual communication. The Sicilian family photos collected in this essay belong to this category of cultural products and allow us to reflect on the different articulations of cultural phenomena.

Insertion des jeunes : 1986, l'année stage

1986

Understanding the determinants of volatility clustering in terms of stationary Markovian processes

2016

Abstract Volatility is a key variable in the modeling of financial markets. The most striking feature of volatility is that it is a long-range correlated stochastic variable, i.e. its autocorrelation function decays like a power-law τ − β for large time lags. In the present work we investigate the determinants of such feature, starting from the empirical observation that the exponent β of a certain stock’s volatility is a linear function of the average correlation of such stock’s volatility with all other volatilities. We propose a simple approach consisting in diagonalizing the cross-correlation matrix of volatilities and investigating whether or not the diagonalized volatilities still kee…

Boosting working memory with accelerated clocks

2021

Our perception of time varies with the degree of cognitive engagement in tasks. The perceived passage of time accelerates while working on demanding tasks, whereas time appears to drag during boring situations. Our experiment aimed at investigating whether this relationship is mutual: Can manipulated announcements of elapsed time systematically affect the attentional resources applied to a cognitive task? We measured behavioral performance and the EEG in a whole report working memory paradigm with six items of different colors that each had to be reported after a short delay period. The 32 participants were informed about the current time after each 20 trials, while the clock was running at…

EFFECT OF LOW-FREQUENCY NOISE ON ADIABATIC PASSAGE IN A SUPERCONDUCTING NANOCIRCUIT

2011

Recent experiments have demonstrated coherent phenomena in three-level systems based on superconducting nanocircuits. This opens the possibility to detect Stimulated Raman Adiabatic Passage (STIRAP) in artificial atoms. Low-fequency noise (often 1/f) is one of the main sources of decoherence in these systems, and we study its effect on the transfer efficiency. We propose a way to analyze low frequency fluctuations in terms of fictitious correlated fluctuations of external parameters. We discuss a specific implementation, namely the Quantronium setup of a Cooper-pair box, showing that optimizing the trade-off between efficient coupling and protection against noise may allow us to observe co…

La scoperta, sistemazione e conservazione della grande Iscrizione di Gortina, nell'isola di Creta (1884-1921): la protezione delle testimonianze e le…

2013

La scoperta e la conservazione della Grande Iscrizione di Gortina a Creta, da parte degli studiosi italiani, fra la fine del XIX sec. e i primi decenni del XX sec., rappresentò un grande riconoscimento scientifico-culturale per la giovane nazione italiana. Nel passato, l’isola di Creta era stata legata alla Repubblica di Venezia e anche questo rapporto favorì l’invio a Creta del giovane epigrafista F. Halbherr, il quale fra notevoli peripezie rinvenne, assieme all’epigrafista tedesco E. Fabricius, la famosa l’iscrizione nell’antica città di Gortina. L’iscrizione, fra le più antiche e complete finora conosciute in tutta Europa, conteneva le norme sulla famiglia, l’eredità e in generale i dir…