Search results for "Analyse"
showing 10 items of 1155 documents
Comparative Cytocompatibility and Mineralization Potential of Bio-C Sealer and TotalFill BC Sealer
2019
The aim of this study was to investigate the cytocompatibility and mineralization potential of two premixed hydraulic endodontic sealers compared with an epoxy resin-based root canal sealer. The cellular responses and mineralization capacity were studied in human periodontal ligament stem cells (hPDLSCs) that were exposed to premixed hydraulic sealers, Bio-C Sealer (Angelus, Londrí
Ultrafast optics in coherently spinning molecules
2020
This thesis reports on the study of unidirectional rotation of molecules and focuses on the rotational Doppler effect occuring in the course of third-harmonic generation in coherently spinning molecules.The rotational Doppler effect appears when a circularly polarized wave interacts with an anisotropic rotating object. During the interaction, an exchange of angular momentum and energy between the field and the object occurs, leading to a frequency shift of the wave. In this work, the frequency shift of the third-harmonic generated in unidirectionaly rotating molecules has been observed. An anlytical model developped in the mansucript forsees four kinds of frequency shifts depending on the m…
Evaluation of reverse transcription and polymerase chain reaction (RT/PCR) for the detection of rotaviruses: applications of the assay.
1996
Summary Our aim was to evaluate the reverse transcription and polymerase chain reaction (RT/PCR) technique for the detection of rotavirus shedding by infected children as a routine diagnostic procedure, in comparison to the enzyme-linked immunosorbent assay (ELISA), electron microscopy (EM) and polyacrylamide gel etectrophoresis (PAGE) of rotavirus double stranded RNA. Two-hundred and twenty stool specimens were collected from infants and young children with diarrhoea, and 10–20% faecal suspensions were made. Several methods of rotavirus dsRNA extraction were assayed. Electrophoretic analysis of viral RNA was carried out on 10% polyacrylamide gols followed by silver staining. RT/PCR was per…
Known knowns and known unknowns on behavior change interventions and mechanisms of action.
2020
Systematic reviews and meta-analyses of research play an important role in summarizing current knowledge on the efficacy of the behavior change techniques and mechanisms of action that comprise behavioral interventions. The current reviews in the science of behavior change (SOBC) special issue represent a ‘step change’ in evaluating current evidence on behavior change interventions and mechanisms. This concluding article outlines the key findings and emerging issues identified in the reviews (‘known knowns’), and summarizes the evidence gaps highlighted by the reviews that need to be addressed in future research (‘known unknowns’). Specifically, findings of the reviews indicate that: tests …
Rénovation pédagogique des lycées : continuité ou rupture ?
1992
International audience; La classe de seconde générale et technologique et la classe de seconde professionnelle connaissent une nouvelle organisation à compter de la rentrée 1992. La rénovation pédagogique des lycées s'étendra ensuite en 1993 aux classes de première puis aux classes terminales en 1994. Le texte qui suit vise à identifier formellement les facteurs de continuité ou de rupture introduits par la rénovation. Afin de donner quelque consistance à l'analyse, deux champs sont privilégiés. Le premier concerne trois thèmes de comparaison : la démocratisation de l'enseignement, la théorie du capital humain, la place de l'acteur dans le système. Le second champ retenu est historique, il …
Un point de vue historique sur l'articulation entre politique nationale et politiques locales d'éducation
2005
International audience
Premiers résultats de l'enquête longitudinale sur les conditions de la réussite, de l'échec et de l'abandon à l'université de Dijon
1976
International audience
Que faire des enquêtes sur la réussite à l'université ?
1989
International audience; Ce texte propose une réflexion sur les possibilités et les limites de l'utilisation des données empiriques de plus en plus nombreuses dont on dispose aujourd'hui tant sur le passage secondaire / supérieur que sur les conditions de réussite dans le supérieur lui-même. On y recense les problèmes méthodologiques qui se posent à qui veut utiliser ces enquêtes, tout en soulignant combien il est délicat de les intégrer dans le débat politique sur l'accès à l'enseignement supérieur. L'objectif est de faire en sorte que le conseiller d'orientation puisse jouer en l'occurence un rôle d'"utilisateur averti", extrêmement précieux tant au niveau individuel qu'au niveau instituti…
Smarter Teachers, Smarter Pupils? Some New Evidence from Sub-Saharan Africa
2017
Document de travail du BETA, n°2017-35. En ligne sur : http://www.beta-umr7522.fr/productions/publications/2017/2017-35.pdf; We study the effect of teacher subject knowledge on student achievement in mathematics and reading by using a dataset from six Sub-Saharan African countries. By using a difference-indifference between pupils' and teachers' scores in two skills, we are able to avoid potential endogeneity bias. In most estimations, we do not find a significant teacher knowledge effect in most countries. The main reason is teacher absenteeism and the need to focus on core knowledge. Indeed, more knowledgeable teachers improve student learning only if certain conditions are met. For insta…
Primitives detection by a discrete and non linear approach : application to the detection and caracterization of interest points for 3D meshes
2010
This manuscript is dedicated to the detection and caracterization of interest points for 3D meshes. First of all, we show the limitations of the curvature measure on sharp edges, the measure usually used for the analysis of meshes. Then, we present a generalization of the SUSAN operator for meshes, named SUSAN-3D. The saliency measure proposed quantify the local variation of the surface and classify directly the analysed vertices in five classes: salient, crest, flat, valley and cavity. The meshes under consideration are manifolds and can be closed or non-closed, regulars or irregulars, dense or not and noised or not. The accuracy of the SUSAN-3D operator is compared to two curvature operat…