Search results for "arisa"
showing 10 items of 310 documents
Synthèse de nouveaux agents bimodaux hydrosolubles pour l'IRM, l'imagerie nucléaire, l'imagerie biphotonique et la génération de second harmonique
2015
The goal of my PhD studies was to synthesize new compounds for possible medical imaging applications. The first part of my thesis focused on the synthesis of heteroleptic ligands to achieve the chelation of two different metals aimed at addressing two types of medical imaging. We first synthesized porphyrins, which are well-known for the chelation of numerous transition metals. We focused on copper, whose copper-64 isotope is a β+ emitter usable in Positron Emission Tomography (PET). These porphyrins have been coupled with a DOTA derivative. This molecule, metallated with gadolinium, is well-known in Magnetic Resonance Imaging (MRI). Our compounds display encouraging relaxivities for MRI ap…
Scolarisation précoce en France : quels bénéfices pour les élèves ?
2002
02039http://www.ordp.vsnet.ch/fr/resonance/2002/doc/No%2010-Resonances%20juin%2002.pdf
Teacher Shortages, Teacher Contracts and their Impacton Education in Africa
2007
Primary school enrolment rates are very low in francophone Africa. In order to enhance education supply, manycountries have launched large teacher recruitment programmes in recent years, whereby teachers are no longer engaged on civil servant positions, but on the basis of (fixed-term) contracts typically implying considerably lower salaries and a sharply reduced duration of professional training. While this policy has led to a boost of primary enrolment, there is a concern about a loss in the quality of education. In this paper we analyse the impact on educational quality, by estimating nonparametrically the quantile treatment effects for Niger, Togo and Mali, based on very informative dat…
Socio-spatial polarisation and policy response: Perspectives for regional development in the Baltic States
2022
Based on a relational understanding of socio-spatial polarisation as a nested, multidimensional and multi-scalar process, the paper applies a comparative perspective on current trends of socio-spatial development in Estonia, Latvia and Lithuania. Comparing current scholarship and data on demographic and economic processes of centralisation and peripheralisation, we also examine political debates around issues of polarisation in different scholarly national perspectives. Despite variations in national discourses, our comparative perspective conveys strong similarities between the three Baltic countries in terms of socio-economic and demographic concentration in the capital regions to the di…
Quantifier Elimination and Rectilinearisation Theorem for Generalised Quasianalytic Algebras
2013
International audience; An algebra of germs of real functions is generalised quasianalytic if to each element of the algebra we can associate, injectively, a power series with nonnegative real exponents. We prove a quantifier elimination and a rectilinearisation result for generalised quasianalytic algebras.
La scolarisation à Djibouti
2011
La recherche présentée, menée à Djibouti, interroge les enjeux actuels de l'école de base sous ses principales déclinaisons. Situant historiquement l'école primaire (publique et privée catholique) d'inspiration occidentale face à son héritage de la colonisation, elle la confronte anthropologiquement à l'éducation traditionnelle d'une part et la renvoie au contexte de scolarisation orientale (école coranique et madrasa) coexistant d'autre part. Une fois établie la typologie scolaire, l'étude éclaire les enjeux philosophique, pédagogique et socio-professionnel inhérent ou résultant du choix de scolarisation.
Le nouvel ordre des violences carcérales
2022
National audience
Resonant X-ray scattering in biological structure research
2007
The use of anomalous X-ray scattering of light elements like sulfur and phosphorus is of particular interest in biological structure research. These elements serve as native labels in proteins, nucleic acids and membranes. Their medium scattering power is drastically changed at their K absorption edges at wavelengths between 5 and 6 A where X-ray absorption excludes the use of open air diffractometers. The construction of a new diffractometer tunable to wavelengths between 1.2 and 7 A is presented. First results of anomalous scattering from sulfur in bacteriorhodopsin near the K absorption edge have been obtained recently. Their possible impact on crystallography will be considered. A compa…
Les cultures de sciences en Europe : dispositifs. Quelles actions, quelles recherches, quelles recherches-actions, quelles actions-recherches ?
2012
International audience
3D digitization of transparent objects by polalization techniques in IR & by triangulation in UV
2011
Two non-conventional methods for the 3D digitization of transparent objects via non-contact measurement are reported in this thesis. 3D digitization is a well acknowledged technique for opaque objects and various commercial solutions based on different measurement approaches are available in the market offering different types of resolution at different prices. Since these techniques require a diffused or lambertian surface, their application to transparent surfaces fails. Indeed, rays reflected by the transparent surface are perturbed by diverse inter-reflections induced by the refractive properties of the object. Therefore, in industrial applications like quality control, the transparent …