Search results for "AFRICA"
showing 10 items of 962 documents
Sensitivity of low-level clouds and precipitation to anthropogenic aerosol emission in southern West Africa: a DACCIWA case study
2021
Abstract. During the West African summer monsoon, pollutants emitted in urbanized coastal areas modify cloud cover and precipitation patterns. The Dynamics-Aerosol-Chemistry-Cloud-Interactions in West Africa (DACCIWA) field campaign provided numerous aircraft-based and ground-based observations, which are used here to evaluate two experiments made with the coupled WRF-CHIMERE model, integrating both the direct and indirect aerosol effect on meteorology. During one well-documented week (1–7 July 2016), the impacts of anthropogenic aerosols on the diurnal cycle of low-level clouds and precipitation are analyzed in detail using high and moderate intensity of anthropogenic emissions in the expe…
Typification and taxonomic status of Portulaca macrantha (Portulacaceae)
2010
The name Portulaca macrantha (Maire) Ricceri & Arrigoni and its basionym, P. oleracea var. macrantha Maire, from Morocco, are lectotypified. Seed micromorphology demonstrates that the species is distinct from the closely related P. papillatostellulata and P. rausii. It does not occur in Italy.
The Mediterranean, or Where Africa Does (Not) Meet Italy: Andrea Segre's A Sud di Lampedusa (2006)
2013
The essay studies the crossing (or "burning") of the hundred thousand Africans who have traversed the Mediterranean in the past decades to look for better life conditions in Europe, through an analysis of Andrea Segre's documentaries, in particular South of Lampedusa (2006).
Practices of Citizenship in East Africa
2019
La relation entre réformes des programmes scolaires et acquisitions à l'école primaire en Afrique : réalité ou fantasme ? L'exemple de l'approche par…
2007
This paper proposes a critical analysis of the introduction and implementation of new school curricula in Africa based on the example of the skills based approach (SBA). In many countries, the SBA has been chosen as the most appropriate and relevant method to change their school curriculum and improve education quality. We analyse the implementation of those new curricula based on the SBA in primary schools in Mauritania. The results show that the main problems about pupil's achievement lie rather in the effective implementation of curricula in the classrooms than in their contents. Additional analyses show that this result is confirmed, as well, in other African countries. As a background …
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…
L'éducation en Afrique sub-saharienne. Les indicateurs d'efficience et leur utilisation politique
2005
05047; National audience; Cet article examine l'idée selon laquelle les systèmes éducatifs africains ne souffriraient pas tant d'un manque de ressources que d'une mauvaise utilisation de celles-ci. Deux arguments soutiennent cette idée. Le premier relève d'une comparaison internationale de l'efficience fondée sur un indicateur -part des dépenses d'éducation dans le PIB / durée moyenne de scolarisation- défectueux. Le second rrelève de l'estimation des fonctions de production scolaire dont l'interprétation commune des résultats est incorrrecte. Cette double argumentation, discutable, dissuade une forte augmentation de l'aide et encourage l'expansion de systèmes dont la médiocrité, conforme à…
Profiling in Algorithm-Based Decisions: An African Perspective
2023
The chapter explores the experience of algorithm-based decisions in Africa, and how non-African players are using artificial intelligence to enhance their presence in Africa. The chapter then looks at how some of the legal systems of Africa are adapting to deal with this phenomenon in the related jurisdictions.
Sialotranscriptomics of the argasid tick ornithodoros moubata along the trophogonic cycle
2021
32 páginas, 8 tablas, 6 figuras
Mise en évidence de corps d'origine cosmique probable au sein de la formation de Carnot (République Centrafricaine)
1992
Resume Deux etudes realisees independamment l'une de l'autre, ont permis de mettre en evidence, au sein de la Formation de Carnot, formation fluviatile mesozoique, d'une part des spherules magnetiques recuperees dans les residus d'un forage (zone de Boyali), d'autre part une anomalie magnetique tres localisee (sur 270 metres de long) traduisant la presence d'un corps decametrique a forte magnetisation remanente (zone de Gambondo). Ces deux elements magnetiques ont une origine cosmique probable. Ils correspondent a des micrometeorites et a une meteorite ayant atteint l'ouest de la Republique Centrafricaine entre l'Albien et le Maastrichtien.