The GANIL control system as seen from the control room

http://accelconf.web.cern.ch/AccelConf/c81/papers/fp-08.pdfInternational audienc

Instabilities in crystal growth by atomic or molecular beams

The planar front of a growing a crystal is often destroyed by instabilities. In the case of growth from a condensed phase, the most frequent ones are diffusion instabilities, which will be but briefly discussed in simple terms in chapter II. The present review is mainly devoted to instabilities which arise in ballistic growth, especially Molecular Beam Epitaxy (MBE). The reasons of the instabilities can be geometric (shadowing effect), but they are mostly kinetic or thermodynamic. The kinetic instabilities which will be studied in detail in chapters IV and V result from the fact that adatoms diffusing on a surface do not easily cross steps (Ehrlich-Schwoebel or ES effect). When the growth front is a high symmetry surface, the ES effect produces mounds which often coarsen in time according to power laws. When the growth front is a stepped surface, the ES effect initially produces a meandering of the steps, which eventually may also give rise to mounds. Kinetic instabilities can usually be avoided by raising the temperature, but this favours thermodynamic instabilities. Concerning these ones, the attention will be focussed on the instabilities resulting from slightly different lattice constants of the substrate and the adsorbate. They can take the following forms. i) Formation of misfit dislocations (chapter VIII). ii) Formation of isolated epitaxial clusters which, at least in their earliest form, are `coherent' with the substrate, i.e. dislocation-free (chapter X). iii) Wavy deformation of the surface, which is presumably the incipient stage of (ii) (chapter IX). The theories and the experiments are critically reviewed and their comparison is qualitatively satisfactory although some important questions have not yet received a complete answer.Comment: 90 pages in revtex, 45 figures mainly in gif format. Review paper to be published in Physics Reports. Postscript versions for all the figures can be found at http://www.theo-phys.uni-essen.de/tp/u/politi

Interplane cross-saturation in multiphase machines

The use of electrical machines in electric vehicles and high-power drives frequently requires multiphase machines and multiphase inverters. While appropriate mathematical models under the linear magnetic conditions are readily available for multiphase machines, the same cannot be said for the models of the saturated multiphase machines. This paper examines the saturation in an asymmetrical six-phase induction machine under different supply conditions and addresses the applicability of the existing saturated three-phase machine models for representation of saturated multiphase machines. Specifically, the mutual coupling between different sequence planes in the vector space decomposed model under saturated conditions is analyzed. The paper relies on analytical considerations, finite element analysis and experimental results. It is shown that the saturation of the main flux path is influenced by the current components in the orthogonal (non-fundamental) sequence plane. This implies the need to develop new multiphase machine models which take this effect into account

Transitioning to safety II : understand how the health care team’s modes of success could turn into risks for patients.

International audienceA recent thesis work sought to develop a new method to analyse the risks incurred by radiotherapy patients in France, in order to overcome the difficulties met when applying Failure Mode and Effects Analysis (FMEA) for complex socio-technical system. We would like to present this method in line with the Safety-II perspective. Actually, participating to the Workshop will be an opportunity to place this research in relation to other Safety-II approaches, and to discuss its strengths and weaknesses

Transitioning to safety II : understand how the health care team’s modes of success could turn into risks for patients.

International audienceA recent thesis work sought to develop a new method to analyse the risks incurred by radiotherapy patients in France, in order to overcome the difficulties met when applying Failure Mode and Effects Analysis (FMEA) for complex socio-technical system. We would like to present this method in line with the Safety-II perspective. Actually, participating to the Workshop will be an opportunity to place this research in relation to other Safety-II approaches, and to discuss its strengths and weaknesses

Radiation damage effects on the leach resistance of glasses and minerals: implications for radioactive waste storage

Truth and fiction on the Net Yannick Maignien The Internet and the World Wide Web are often praised for their prodigious informational power, but criticised at the same time for the difficulty of determining the veracity of information obtained. The present article attempts to reflect on the necessity of moving beyond this contradiction. With the advent of the Web, fundamental questions regarding the relation of language to the world are once again at stake. Thus, relationships of reference, denotation, veridiction, symbolic denotation and fiction, proposed by logical and analytic philosophy, should be increasingly employed. Moreover, the patterns of human behaviour underlying the Web could be more accurately analysed using pragmatic theories, in order to integrate procedural metadata. Finally, the question of the emergence of fictional or “possible” worlds within the Web heuristic seems essential if we hope to move beyond the error/truth dichotomy. Automatic linguistic tools (metalanguage, RDF syntax) must take into account richer logical dimensions than those currently envisaged. Date of publication: 25 November 200

Contribution a la modelisation des moteurs asynchrones par la methode des elements finis

SIGLEINIST T 74756 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc