Search results for "passage"

Reliability analysis of processes with moving cracked material

2015

Abstract The reliability of processes with moving elastic and isotropic material containing initial cracks is considered in terms of fracture. The material is modelled as a moving plate which is simply supported from two of its sides and subjected to homogeneous tension acting in the travelling direction. For tension, two models are studied: (i) tension is constant with respect to time, and (ii) tension varies temporally according to an Ornstein–Uhlenbeck process. Cracks of random length are assumed to occur in the material according to a stochastic counting process. For a general counting process, a representation of the nonfracture probability of the system is obtained that exploits condi…

L'insertion professionnelle : plus de chômage, moins d'emploi pour les filles

1988

Bourgogne : l'entrée des filles dans la vie active

1986

Two-laser multiphoton adiabatic passage in the frame of the Floquet theory. Applications to (1+1) and (2+1) STIRAP

1998

We develop an adiabatic two-mode Floquet theory to analyse multiphoton coherent population transfer in N-level systems by two delayed laser pulses, which is a generalization of the three-state stimulated Raman adiabatic passage (STIRAP). The main point is that, under conditions of non-crossing and adiabaticity, the outcome and feasibility of a STIRAP process can be determined by the analysis of two features: (i) the lifting of degeneracy of dressed states at the beginning and at the end of the laser pulses, and (ii) the connectivity of these degeneracy-lifted branches in the quasienergy diagram. Both features can be determined by stationnary perturbation theory in the Floquet representation…

Note critique de "De la formation initiale à la vie active. Faciliter les transitions" (OCDE). 2000

2002

International audience

L'oralità dell'immagine. Etnografia visiva nelle comunità rurali siciliane

2018

L’opposizione ipotizzata fra tradizioni orali e scritte, che prevale in antropologia, è ingannevole: in primis perché tende ad annullare l’orale nel contrario dello scritto, e non ne comprende il modo di funzionare specifico; in secondo luogo perché non contempla la possibilità che, tra gli estremi dell’orale puro e dello scritto puro, esistano molte situazioni intermedie. Paradossalmente oggi, nella nostra società così impregnata di immagini, l’oralità è ritornata ad assumere un ruolo centrale proprio per la produzione e la comprensione del codice visivo. Questa «oralità dell’immagine» è connaturata nei nostri comportamenti quotidiani e per questo motivo risulta difficile individuarla e an…

Logistic Growth Described by Birth-Death and Diffusion Processes

2019

We consider the logistic growth model and analyze its relevant properties, such as the limits, the monotony, the concavity, the inflection point, the maximum specific growth rate, the lag time, and the threshold crossing time problem. We also perform a comparison with other growth models, such as the Gompertz, Korf, and modified Korf models. Moreover, we focus on some stochastic counterparts of the logistic model. First, we study a time-inhomogeneous linear birth-death process whose conditional mean satisfies an equation of the same form of the logistic one. We also find a sufficient and necessary condition in order to have a logistic mean even in the presence of an absorbing endpoint. Then…

Idrarchia, resistenza marittima e la produzione della razza. Intervista a Marcus Rediker

2021

Marcus Rediker torna sul tema della tratta atlantica per discutere l’attualità della schiavitù quale costante nella storia e sviluppo del capitalismo. È sulle navi negriere durante il Middle Passage, «ancora ai margini della nostra coscienza moderna», che si produce la razza per come oggi la conosciamo, che si organizza l’accumulazione del capitale, che inizia a prender forma il capitalismo globale. Ma è nello stesso spazio atlantico che si costruisce la resistenza allo sfruttamento, la cooperazione radicale, la solidarietà conflittuale di schiavi ammutinati, marinai ribelli, fuggitivi e pirati. Il mare come luogo reale di comando e tensione al cambiamento, «come spazio delle principali tra…

Discussing Tourism as a Rite of Passage

2018

This chapter recapitulates the discussion originated by John Tribe respecting to the dispersion of produced knowledge in tourism. We critically give a new fresh paradigm in order for readers to understand what tourism is. This chapter centers on themes I am not accustomed to discuss but are very important to the epistemological advance of the discipline, precisely in a moment where the epistemology of tourism enters in a serious crisis. Though I here am synthesizing my experience as author, reviewer and editor, no less true is that it situates as a complementary platform to expand the current understanding of tourism and its intersection in culture.

Does Animation Facilitate Comprehension of Public Information Graphics? Evidence from Eye Tracking.

2011

Graphic information displays have the potential to communicate public information in situations where normal announcement types are ineffective. This study used eye tracking techniques to analyze comprehension mechanism of event-related information on railway traffic disruptions presented via different graphic formats. One hundred thirteen participants were asked to understand and compare series of traffic disruption messages delivered via three purely visual formats. Animated displays were the most effective presentation type. Eye tracking data showed why an animation facilitates comprehension: it enhances processing strategies which provide the best condition for segmenting the causal cha…