Search results for "Fiabilité"
showing 7 items of 7 documents
Etude diagnostique de nouvelles données climatiques : les réanalyses. Exemples d'application aux précipitations en Afrique tropicale
2000
This study establishes an objective diagnosis of NCEP/NCAR reanalysis data reliability over tropical Africa at intra-seasonal to interannuel space scale. The reanalysis data are an original database available over 1958-1998 period which combines observations and atmospheric model outputs and allows us to better understand global scale atmospheric dynamics. The study of data reliability allows us to identify a great number of recommendations for using them. Over tropical Africa, the homogeneous period which should be extracted goes from 1968 to 1998. Before this year, reanalysed datasets should be used with greatest caution. However, during this period, the SMWDA, a statistical method used t…
Quantification des Brettanomyces par qPCR
2017
International audience; Brettanomyces bruxellensis est une levure d’altération du vin avec de faibles besoins nutritionnels, résistante à l’éthanol et aux faibles pH, lui permettant une implantation en vin durant ou après la fermentation alcoolique (Conterno et al., 2006). B. bruxellensis est capable de produire des phénols volatils (éthyl-4-phénol, éthyl-4-gaïacol et éthyl-4-catéchol) (Oelofse et al., 2008). Ces molécules volatiles odorantes amènent un caractère phénolé et animal au vin connu sous le nom de « caractère Brett ». D’autres molécules (2-acétyltétrahydropyridine et 2-éthyltétrahydropyridine) produites par B. bruxellensis sont également responsables d’une déviation organoleptiqu…
Incertitude de mesure : de la pratique au calcul
2018
Validité et fiabilité des questionnaires d'évaluation de la qualité de vie : une étude appliquée aux accidents vasculaires cérébraux
1996
This article deals with various means, which could be used by designers in order to estimate error terms in questionnaire tests results, thanks to psychometry. The study must be conceived so as to minimize systematic errors (validity) and random errors (reliability). Methods settled to test the validity of a study are very subjective, even if some of them seem to be more "scientific", being based on the principle of correlation. However the last-mentined don't stand up to some theoretic weakness and other explicit subjective methods should be chosen instead : for instance experts consensus.Methods of reliability evaluation have been developed under strong hypothesis to estimate a reliabilit…
Models and tools for territorial dynamic studies (chapter 1)
2012
As part of the ArchaeDyn project, a workgroup was formed to coordinate the development, implementation and application of methods and tools for spatial analysis. The workgroup's activities were directed at various problems. The first was to construct a grid common to all the workgroups and to homogenize the study areas used by the different workgroups in their databases. The 'confidence maps' method was suggested for assessing the quality and quantity of information inventoried in the databases. Confidence maps are produced from representation and reliability maps by simple map algebra and they can be considered as 'masks' for interpreting spatial analysis results. Finally, the research tea…
La juste valeur satisfait-elle les qualités essentielles de l’information financière ? Le point de vue des analystes financiers français
2010
The primary purpose of the application of fair value accounting is to provide financial informations that investors find most helpful in their decision making. To help better understand this issue, this research project examines the decision usefulness of fair value information to investors. Using a survey of French financial analysts, this study investigates the principal qualitative characteristics of fair value information. We examine especially whether this information is relevant, reliable and comparable. The results document that financial analysts consider fair value as an approach able to r eflect the current economic reality of the firm and to ameliorate the assessment of financial…
Confidence maps: a tool to evaluate archaeological data's relevance in spatial analysis
2007
L'article est disponible en ligne sur Virtual Library Propylaeum : http://archiv.ub.uni-heidelberg.de/propylaeumdok/volltexte/2010/551/pdf/08_05_ostir_et_al_confidence.pdf; International audience