Search results for "ARISA"
showing 10 items of 310 documents
Les soubassements religieux de la vulgarisation scientifique dans la France du XIXè siècle
2014
International audience
Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations
2007
The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…
Scolarisation primaire universelle et pilotage par les résultats dans le contexte africain
2010
Cet article met en évidence que pour rendre compte de l'effectivité de la scolarisation primaire universelle, il est nécessaire d'avoir recours à des indicateurs qui intègrent à la fois la dimension quantitative : quelle est la proportion d'enfants qui suivent une scolarité primaire complète ? Et la dimension qualitative : est-ce que les élèves maîtrisent les compétences de base à l'issu du cycle primaire ? En suivant cette approche, de nouveaux indicateurs peuvent être pris en considération au niveau des systèmes éducatifs. Toutefois, ce questionnement permet de signaler la faiblesse actuelle du pilotage de la qualité de l'éducation dans les systèmes éducatifs africains. S'inspirant de la …
La dimension rurale des scolarisations dans les pays d'Afrique au Sud du Sahara : situation actuelle et défis pour le développement de la couverture …
2008
08065; Texte présenté lors du séminaire de l'Iredu, 28 octobre 2008. Ce texte est une version réduite d'un texte de 76 pages portant le même nom.; Dans cette étude, nous avons examiné sous divers aspects la situation de l'éducation en milieu rural, et cela dans un nombre aussi grand que possible de pays d'Afrique sub-saharienne à faible revenu. Les domaines analysés ont été de façon principale i) la scolarisation des ruraux (quelle est l'ampleur de leur retard par rapport aux urbains, et dans quels processus se construit ce retard le long du système éducatif ?) ii) l'organisation et le coût des services éducatifs en milieu rural, notamment au niveau du premier cycle de l'enseignement second…
Per una secolarizzazione della scienza. Scienziati o terrapiattisti?
2020
Le teorie scientifiche, quando pretendono di imporsi come descrizioni metafisiche del cosmo, senza l’attenta vigilanza di una disciplina critico-filosofica, rischiano di straripare in una terra di nessuno in cui nani e giganti si combattono senza regole e con la sola arma spuntata dell’opinione indiscriminata.
Rethinking Secular Time in Victorian England
2022
This open access book draws on conceptual resources ranging from medieval scholasticism to postmodern theory to propose a new understanding of secular time and its mediation in nineteenth-century technological networks. Untethering the concept of secularity from questions of ‘religion’ and ‘belief’, it offers an innovative rethinking of the history of secularisation that will appeal to students, scholars, and everyone interested in secularity, Victorian culture, the history of technology, and the temporalities of modernity. Rethinking Secular Time in Victorian England
Temporal dynamic of biofilms enhances the settlement of the central-1 Mediterranean reef2 builder Dendropoma cristatum (Biondi, 1859)
2021
Research on marine invertebrate settlement provides baseline knowledge for restoration technique implementation, especially for biogenic engineers with limited dispersion ability. Previously, we determined that the maturity of a biofilm strongly enhances the settlement of the vermetid reef-builder Dendropoma cristatum . In order to elucidate which biofilm features support a higher settlement of this species, we analyse the structure and composition of a marine biofilm over time, through microscopic observations, eukaryotic and prokaryotic fingerprinting analyses and 16S rDNA Illumina sequencing. The vermetid settlement temporal increase matched with the higher biofilm extent on the substrat…
Modification of the Selectivity Properties of Tubular Ceramic Membranes after Alkaline Treatment
2017
International audience; This work focuses on the selectivity modification of ceramic membranes after a mild alkaline treatment. Filtration of pure saltwater solutions was carried out with commercial titania membranes before and after the treatment. After treatment, the rejection of NaF significantly decreased, while the rejection of NaCl and NaBr increased. Additionally, NaI and Na 2 SO 4 remained close to zero. Pore size and electrical charge being almost unchanged, only significant modifications in the dielectric effects can explain this modification of selectivity. Therefore, the surface chemistry and the interaction (nature and magnitude) with the solvent and with the species present in…
The dynamics of soil bacterial community structure in response to yearly repeated agricultural copper treatments
2008
International audience; The annual dynamics of soil bacterial community structure, including early, dose-dependent and transient modifications, was observed consecutively at different levels of copper contamination (high: 48 kg Cu ha−1, low: 16 kg Cu ha−1) repeated yearly over a three-year field experiment. Repeated low-level Cu contamination led to an increase in community stability to metal stress without a long-term shift in the population structure, whereas repeated high-level Cu contamination induced a novel and stable bacterial community structure. Furthermore, field experimentation highlighted that episodic climatic stress can modulate copper impact by enhancing community stability.
Effects of solarisation on soil thermal-physical properties under different soil treatments: A review
2020
Solarisation technology allows for improving soil quality as well as crop productivity. The influence of the properties and method of use of plastic materials used to cover soils, such as the number and thickness of layers, and colour of the material, significantly alters soil thermal-physical properties. These effects can be managed and modified to increase solarisation efficiency by achieving a decrease in vapour movement between the soil surface and the atmosphere. Also, soil solarisation establishes microclimates that increase the effectiveness of fertilisers, thus modifying the soil thermal-physical properties. However, there is a lack of complete and general overview of this widely us…