Search results for "Island"
showing 10 items of 761 documents
L'école à La Réunion -approches plurielles
2005
05024; Le devenir du système éducatif à La Réunion constitue un défi important et complexe, qui nécessite une pluralité d'approches. L'ouvrage commence par une étude sur le développement de la scolarisation dans l'île, incluant les évolutions les plus récentes. Vient ensuite une analyse quantitative des déterminants de la réussite et de l'échec scolaires en comparaison avec ceux de la métropole.
Temperature Inversion Breakup with Impacts on Air Quality in Urban Valleys Influenced by Topographic Shading
2015
AbstractUrban valleys can experience serious air pollution problems as a combined result of their limited ventilation and the high emission of pollutants from the urban areas. Idealized simulations were analyzed to elucidate the breakup of an inversion layer in urban valleys subject to a strong low-level temperature inversion and topographic effects on surface heating such as topographic shading, as well as the associated air pollution transport mechanisms. The results indicate that the presence and evolution in time of the inversion layer and its interplay with an urban heat island within the valley strongly influence the venting of pollutants out of urban valleys. Three mechanisms of air …
Trends in soil mercury stock associated with pollution sources on a Mediterranean island (Majorca, Spain)
2021
8 Pág. Centro de Biotecnología y Genómica de Plantas
Wave Energy Assessment and Performance evaluation in Mediterranean Sea
2020
The paper proposes a revolutionary device for the utilization of a new entry of renewable energy sources: sea wave. This technology is based on linear generators, able to converts directly a linear motion into electrical output, limiting to minimum the chain of energy conversion. A preliminary feasibility assessment considers a case study applied in Lampedusa, a small island in the Mediterranean Sea. Economic and environmental evaluations are here reported.
A distributed minimum losses optimal power flow for islanded microgrids
2017
Abstract In this work, the minimum losses optimal power dispatch problem for islanded microgrids with distributed energy resources (DER) is solved by means of a distributed heuristic approach. Optimal power management is performed almost in real time, with a predefined schedule, i.e. every 5 min, and the solution is applied to generators when the current operating solution violates voltage or current constraints or when the current configuration produces too large power losses. The operating point of both inverter-interfaced generation units as well as rotating production systems can be modified simply using local information. The latter are voltage measurements and power injections or load…
Detrital and igneous zircon ages for supracrustal rocks of the Kyrgyz Tianshan and palaeogeographic implications
2014
Abstract We report detrital zircon ages for Precambrian and early Palaeozoic metasediments from the Tianshan orogen in Kyrgyzstan, an important component of the Central Asian Orogenic Belt and compare these with published ages from the Chinese Tianshan and the Tarim craton. These data provide information on possible source terrains and suggest that Precambrian basement is widespread in the Tianshan and may, at least in part, represent continental fragments rifted off the Tarim craton during the early history of the Central Asian Orogenic Belt. Distinct differences in the Precambrian zircon age distribution between the North and Middle Tianshan of Kyrgyzstan support earlier ideas that these …
Germline correction of an epimutation related to Silver-Russell syndrome.
2015
Like genetic mutations, DNA methylation anomalies or epimutations can disrupt gene expression and lead to human diseases. However, unlike genetic mutations, epimutations can in theory be reverted through developmental epigenetic reprograming, which should limit their transmission across generations. Following the request for a parental project of a patient diagnosed with Silver-Russell syndrome (SRS), and the availability of both somatic and spermatozoa DNA from the proband and his father, we had the exceptional opportunity to evaluate the question of inheritance of an epimutation. We provide here for the first time evidence for efficient reversion of a constitutive epimutation in the sperm…
Tourism planning and innovation: The Caribbean under the spotlight
2018
International audience; The importance of the islands working together toward a multicentre product for tourists has been highlighted asearly as the 1980s, and yet hardly anything has been done in that sense. Can cluster be considered as the wayforward for the sustainable development of the Caribbean? This question could be considered as the first step ofthe tourism planning process. Hierarchical method or linkage method that works by identifying entities thatmatch each other based on the investigator selection of similar attribute categories is the most suitable clusteringapproach for the Caribbean. Despite the fact that cluster appears as a potential solution for issues faced by someCarib…
Geochronology and palaeomagnetism of a late Proterozoic island arc terrane from the Red Sea Hills, northeast Sudan
1992
Abstract Size fractions and single grains of zircon, hornblende and biotite have been dated to define the formation age and thermal history of the northern Haya Terrane (NHT), a late Proterozoic island arc terrane of the Red Sea Hills (RSH), northeast Sudan. U Pb and 207 Pb/ 206 Pb zircon data for acidic volcanics and granitoid rocks bracket the time of formation of the NHT between 887 ± 20 and 854 ± 9 Ma. 40 Ar/ 39 Ar hornblende and biotite ages of a gabbro near Suakin suggest passage through the argon closing temperature for hornblende at about 841 ± 4 Ma and 782 ± 6 Ma for biotite. The hornblende age is considered to be representative of the age of magnetic blocking and, hence, the age o…
Pédagogie muséale et enseignement du volcanisme à la Réunion
2003
Research into pedagogy in museums underlines the double tranposition of the theory principles of the science media and of psycho-pedagogy. At stake is understanding why and how pupils can build their scientific learning in a museum environment. This present contribution will propose a reflection on this issue based on the example of the teaching of volcanism on Réunion Island. The analysis of interviews conducted with teachers in first schools and secondary schools shows to what extent the pupils benefit from a significant pedagogical impact in the framework of their visits to the thematic museum in Piton de la Fournaise. The results show that the teachers, going further than the objectives…