Conservatoire national des arts et métiers

About: Conservatoire national des arts et métiers is a education organization based out in Paris, France. It is known for research contribution in the topics: Population & Orthogonal frequency-division multiplexing. The organization has 3573 authors who have published 7127 publications receiving 141430 citations. The organization is also known as: CNAM & Conservatoire des arts et métiers.

A framework for quality evaluation in data integration systems

Abstract: Ensuring and maximizing the quality and integrity of information is a crucial process for today enterprise information systems (EIS) It requires a clear understanding of the interdependencies between the dimensions characterizing quality of data (QoD), quality of conceptual data model (QoM) of the database, keystone of the EIS, and quality of data management and integration processes (QoP) The improvement of one quality dimension (such as data accuracy or model expressiveness) may have negative consequences on other quality dimensions (eg, freshness or completeness of data) In this paper we briefly present a framework, called QUADRIS, relevant for adopting a quality improvement strategy on one or many dimensions of QoD or QoM with considering the collateral effects on the other interdependent quality dimensions We also present the scenarios of our ongoing validations on a CRM EIS

Oral rehydration solution in the year 2000: pathophysiology, efficacy and effectiveness

Abstract: The use of oral rehydration solution (ORS) with early refeeding forms the basis of therapy for dehydration secondary to diarrhoea ORS has produced such positive results in dehydrated patients that no further scientific demonstration is needed to confirm its efficacy. This review presents several issues that remain unsettled or controversial. They include the following. 1. The mechanism of water handling by the intestine is discussed; this is more complex than initially thought, at the epithelial, cellular and molecular level. 2. The composition of ORS which has been successfully adapted for the most frequent conditions, except for severely malnourished children, is described. 3. In contrast to the strong scientific basis and obvious efficacy in rehydration of ORS, its consequences for growth, nutrition and mortality are difficult to demonstrate, unless adequate long-term nutritional support is also provided in addition to ORS. 4. Finally, discrepancies between the recommendations and the practice of oral rehydration therapy are now well documented. Analysis of the causes of these discrepancies may participate in improving public health campaigns.

Non-linear vibrations of imperfect free-edge circular plates and shells

Abstract: Large-amplitude, geometrically non-linear vibrations of free-edge circular plates with geometric imperfections are addressed in this work. The dynamic analog of the von Karman equations for thin plates, with a stress-free initial deflection, is used to derive the imperfect plate equations of motion. An expansion onto the eigenmode basis of the perfect plate allows discretization of the equations of motion. The associated non-linear coupling coefficients for the imperfect plate with an arbitrary shape are analytically expressed as functions of the cubic coefficients of a perfect plate. The convergence of the numerical solutions are systematically addressed by comparisons with other models obtained for specific imperfections, showing that the method is accurate to handle shallow shells, which can be viewed as imperfect plate. Finally, comparisons with a real shell are shown, showing good agreement on eigenfrequencies and mode shapes. Frequency-response curves in the non-linear range are compared in a very peculiar regime displayed by the shell with a 1:1:2 internal resonance. An important improvement is obtained compared to a perfect spherical shell model, however some discrepancies subsist and are discussed.