Numerical Study of Finite Size Scaling for First Order Phase Transitions

I present results of simulations of the q=10 and q=20 2-d Potts models in the transition region. The asymptotic finite size behavior sets in only for extremely large lattices. We learn from this simulation that finite size scaling cannot be used to decide that a transition is first order.Comment: Talk presented at the Workshop on Dynamics of First Order Transitions, HLRZ, Forschungszentrum J\"ulich,Germany, June 1-3, 1992, 7 pages, 2 PostScript Figures (typing mistakes in figure captions corrected

Société et l\u27économie à l\u27aune de la révolution numérique (la)

Rapport de la Commission "Économie numérique" présidée par Alain Bravo, du Centre d\u27analyse stratégique, et remis au Secrétaire d\u27État en charge du développement de l\u27économie numérique proposant un exercice prospectif sur les enjeux et perspectives des prochaines décennies (2015-2025). Ce rapport et l\u27ensemble des documents (42 fiches variables et 6 scénariis) sont disponibles sur le site : www.stratégie.gouv.fr/article.php3?id_article=99

Systematic comparison between the ground based automated Dobson of the Observatory of Haute-Provence and TOMS since 1983

The total ozone quantity has been obtained since September 1983 at O.H.P. using the conventional AD wavelength technique. An average of 180 measurements per year is obtained with the Dobson n deg 85. Each of these daily total quantities is in fact an average of at least 5 measurements. The preliminary comparison with TOMS data show good agreement. We discuss systematic daily and monthly comparisons

Repeated applications of compost and manure mainly affect the size and chemical nature of particulate organic matter in a loamy soil after 8 years

Repeated applications of compost and manure mainly affect the size and chemical nature of particulate organic matter in a loamy soil after 8 years. EGU2013 European Geosciences Union General Assembly 201

Validating metabolic syndrome through principal component analysis in a medically diverse, realistic cohort

Abstract: Background: The concept of metabolic syndrome has been subject to etiological and clinical controversies in recent years. Associations among the five risk factors (obesity, high blood pressure, high blood sugar, high triglyceride levels and low HDL cholesterol) may help establish the validity of the concept and its application, but most such studies have been conducted on targeted cohorts not representative of an actual population. Methods: We used principal component analysis (PCA) to analyze the structure of the physiological components of metabolic syndrome in 7213 patients contained in an administrative database for the CHUS hospital in Sherbrooke, Quebec, a realistic cohort with diverse medical histories. We validated the results by repeating the analysis on stratified and random subgroups of patients, and on different combinations of risk factors. The first axis of the PCA was used to predict coronary heart disease (CHD) and diabetes. Results: The two first axes explained 53% of the variance. The first axis (33%) was associated in the expected direction with all five predictor variables, consistent with its interpretation as metabolic syndrome. All validation analyses strongly confirmed this interpretation. The scores from the first axis were more predictive of subsequent CHD and diabetes than the formal definition of metabolic syndrome. Conclusions: These results suggest that the concept of metabolic syndrome accurately captures an existing underlying physiological process. A continuous indicator could be constructed to identify more accurately metabolic syndrome thus improving risk assessment for CHD and diabetes mellitus. Metabolic syndrome can be measured well even without all five predictors, though measurement is improved by PCA relative to dichotomized definitions. However, discrepancies with other studies suggest that our results may not be generalizable, perhaps because our cohort tends to be sicker

Etat des savoirs sur les relations entre les étudiants, les enseignants et les IATOSS dans les établissements d\u27enseignement supérieur

Cette étude a pour objet d\u27établir un état des savoirs sur les relations entre les étudiants, les enseignants et les personnels administratifs (IATOSS) dans les établissements d\u27enseignement supérieur. Elle présente tout d\u27abord un état des savoirs en la matière, s\u27appuyant sur des publications et documents relatifs aux aspects relationnels dans l\u27enseignement supérieur en France. Elle aborde ensuite les conséquences que la massification de l\u27université française a engendrée, à partir des années 1980, sur le contexte humain de l\u27université. Puis elle expose successivement les points de vue des étudiants (y compris les étrangers) sur leurs relations avec les enseignants ; les représentations des enseignants vis-à-vis de leur travail et les perceptions qu\u27ils ont des étudiants ; la relation entre les étudiants eux-mêmes, et le rôle des personnels IATOSS