Search results for "BEC"

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…

Magnetically enhancing the Seebeck coefficient in ferrofluids.

2019

The influence of the magnetic field on the Seebeck coefficient (Se) was investigated in dilute magnetic nanofluids (ferrofluids) composed of maghemite magnetic nanoparticles dispersed in dimethyl-sulfoxide (DMSO). A 25% increase in the Se value was found when the external magnetic field was applied perpendicularly to the temperature gradient, reminiscent of an increase in the Soret coefficient (ST, concentration gradient) observed in the same fluids. In-depth analysis of experimental data, however, revealed that different mechanisms are responsible for the observed magneto-thermoelectric and -thermodiffusive phenomena. Possible physical and physico-chemical origins leading to the enhancemen…

Les dépenses publiques pour l'enseignement universitaire et le rendement fiscal : le cas du Québec et de la France

1989

International audience

Stability in a System subject to Noise with Regulated Periodicity

2011

The stability of a simple dynamical system subject to multiplicative one-side pulse noise with hidden periodicity is investigated both analytically and numerically. The stability analysis is based on the exact result for the characteristic functional of the renewal pulse process. The influence of the memory effects on the stability condition is analyzed for two cases: (i) the dead-time-distorted poissonian process, and (ii) the renewal process with Pareto distribution. We show that, for fixed noise intensity, the system can be stable when the noise is characterized by high periodicity and unstable at low periodicity.

Resonant activation in piecewise linear asymmetric potentials

2011

7 páginas, 8 figuras.-- PACS number(s): 05.40.−a, 05.45.−a, 02.50.Ey

Alla Fondazione Brodbeck è “Tutto da rifare”: la società secondo Adalberto Abbate

2011

The Making of the Ordinary Child in Preschool

2011

The article examines parent-teacher conferences in Finnish and Swedish preschools. Previous research has shown that the conferences are mostly about the evaluation of the child. Based on qualitative data, the article studies how this evaluation is done. It asks how the institutional order regarding children is constructed in parent-teacher conferences and what the ordinary child is like that this order presumes. The theoretical framework is adopted from social constructionist research on childhood and institutions. The analysis applies a discourse analytic framework. The results suggest that being and becoming social is the key expectation for a child in Finnish and Swedish preschools; form…

El registro fósil de vertebrados y patrimonio paleontológico más representativo de los pirineos occidentales

2019

Los Pirineos occidentales son un territorio con una notable diversidad geológica y un importante registro fósil, que constituye un gran archivo de paleobiodiversidad. En lo que respecta al registro fósil de vertebrados, los Pirineos occidentales (Región Vasco-Cantábrica, Cuenca de Pamplona y sector noroccidental de la Cuenca del Ebro) son relevantes tanto desde el punto de vista de los yacimientos paleontológicos como de las colecciones de fósiles procedentes de ellos. Varios yacimientos de vertebrados forman parte del Inventario de Lugares de Interés Geológico (LIG) con alto o muy alto interés paleontológico en la Comunidad Autónoma del País Vasco. Destacan los yacimientos de peces cretáci…

Izquierda en desbandada / 3

2007

Deux plaidoyers mystiques en faveur du « no pensar nada » : le Troisième Abécédaire spirituel (1527) et la Loi d'amour (1530) de Francisco de Osuna

2017

Two mystical pleas for the «no pensar nada»: the Third Spiritual alphabet (1527) and the Law of love (1530) by Francisco de Osuna A mystic principle rooted in negative theology (from Pseudo-Dionysius the Areopagite to Saint John of the Cross), the « no pensar nada » ("thinking-nothing") was strongly defended by Franciscan preacher and spiritual guide of the « Recollection », Francisco de Osuna, in a context of spiritual polemics marked by the condemnation of Toledo's « Alumbrados » ("the Illuminated") in 1525. Despite the Holy Office's strong pressure, and the threat of censorship, Osuna openly advocated the « thinking-nothing » principle in a chapter of the Third Spiritual Alphabet (1527),…