Search results for "Phénomènes"

Political Yardstick Competition and Corporate Governance in the European Union

2006

http://www.dur.ac.uk/john.ashworth/EPCS/Papers_and_Authors.php; The question whether regulatory competition in the area of company law could take place in the European Union (EU) in a way similar to the form it takes in the United States (the Delaware phenomenon) is topical because of some recent judgments of the European Court of Justice (Centros) and documents and projects produced by the European Commission. That question is typically discussed, however, as if voters did not count and as if competition among governments was exclusively based on the mobility of firms across jurisdictions. But intergovernmental competition can also take the form of yardstick, or relative performance, compe…

The unspeakable through the works of some contemporary Spanish composers

2016

The concept of unspeakable, as complex as it may be, can base itself on an experience of the sensitive, and find a common context in the events exceeding the limit and pointing a certain chaos. Those of the Spanish Civil War have constituted, by numerous aspects, examples of these unthinkable excesses. The impact of the environment on the creators has been heard in the thematic traces which are imperative in the works composed on the themes of death, violence or war: from the sound phenomena, some figures making sensitive the exceeding of the limit and chaotic connotation have been highlighted and echo what is beyond belief, as the destruction of man or the inaudibility of death. These figu…

Superior Fischer-Tropsch performance of uniform cobalt nanoparticles deposited into mesoporous SiC

2020

Electrochemically-derived well-crystalline mesoporous silicon carbide (pSiC) was used as a host for cobalt nanoparticles to demonstrate superior catalytic performance during the CO hydrogenation according to Fischer-Tropsch. Colloidal Co nanoparticles (9 ± 0.4 nm) were prepared independently using colloidal recipes before incorporating them into pSiC and, for comparison purposes, into commercially available silica (Davisil) as well as foam-like MCF-17 supports. The Co/pSiC catalyst demonstrated the highest (per unit mass) catalytic activity of 117 µmol.g(CO)-1.g-1(Co).s-1 at 220 °C which was larger by about one order of magnitude as compared to both silica supported cobalt catalysts. Furthe…

Electronic implementation of a non-linear oscillator subjected to noise : application to the modeling of neuronal information coding

2011

We study the nonlinear FitzHugh-Nagumo model witch describes the dynamics of excitable neural element. It is well known that this system exhibits three different possible responses. Indeed, the system can be mono-stable, oscillatory or bistable. In the oscillatory regime, the system periodically responds by generating action potential. By contrast, in the mono-stable state the system response remains constant after a transient. Under certain conditions, the system can undergo a bifurcation between the stable and the oscillatory regime via the so called Andronov-Hopf bifurcation. In this Phd thesis, we consider the FitzHugh-Nagumo model in the stable state, that is set near the Andronov-Hopf…

Angoisses rationnelles et perceptions des corps monstreux

2009

Les stéréotypes nominaux et la combinatoire lexicale

2011

In this article, we are interested in the stereotypes associated with the names of substances and natural phenomena. We try to demonstrate, through their lexical combinatory, that the semantic representation of these names is constituted of the denotative meaning, built on the basis of a knowledge, and the stereotype, i.e. the conventional ideas on the appearance and the nature of the denoted objects.

Obstacles to the problematization of time in an interdisciplinary approach: the explanation of some natural phenomena by Tunisian students and teache…

2009

This research focuses on learning and teaching of biology and geology by students and teachers. The use of geological time in the explanation of some natural phenomena by learners is difficult. We use an epistemological reflection on the teaching and study of this concept in an interdisciplinary approach by using elements of history and philosophy of science. An accurate diagnosis of the difficulties of learners through many research methods let us understand their problems and suggest strategies to facilitate the acquisition not only the concept of time but also other concepts in science. The main objectif of this research is to identify epistemological obstacles to problematization of tim…