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Information access in large Arabic textual collections
Given the amount of Arabic textual information available on the web, developing effective Information Retrieval Systems (IRS) has become essential to retrieve relevant information. Most of the current Arabic SRIs are based on the bag-of-words representation, where documents are indexed using surface...
Petrology and bulk chemistry of Yamato-82094, a new type of carbonaceous chondrite
International audience Carbonaceous chondrites are classified into several groups. However, some are ungrouped. We studied one such ungrouped chondrite, Y-82094, previously classified as a CO. In this chondrite, chondrules occupy 78 vol%, and the matrix is distinctly poor in abundance (11 vol%), com...
Why do farmers not convert to organic farming? Modeling conversion to organic farming as a major change
International audience This study aims to better understand why farmers do not convert to organic farming by studying decision trajectories in a dynamic agent-based model. In this model, an agent's decision on transitioning to organic is based on the comparison between satisfaction with its current...
Using Concept Cartoons to investigate future teachers' knowledge
International audience In the study presented here, we address the issue of how to investigate future primary school teachers' responses to more or less expected children's answers and questions. We observe future primary teachers exposed to contingent situations mediated by an educational tool call...
The Arctic: Opportunities, Concerns and Challenges
International audience The Arctic is often thought of as the land of polar bears and explorers. There are already several industries operating in the Arctic, through the Arctic, or at the periphery of the Arctic Circle. Receding and thinning sea ice with climate change provides increased access to n...
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Comonotonic measures of multivariate risks
We propose amultivariate extension of awell-known characterization by S.Kusuoka of regular and coherent risk measures as maximal correlation functionals. This involves an extension of the notion of comonotonicity to random vectors through generalized quantile functions.Moreover, we propose to replac...
Marais de Chavannes: The Long Story of a Small Marsh
International audience The “Marais de Chavannes” (a small marsh located in French Region Centre) is the subject of a multidisciplinary dialogue between researchers in palaeoenvironment, hydrogeomorphology and archeology, but also between researchers and managers of the marsh. The aim of the study is...
Wavelet and evidence theory for object-oriented classification: Application to change detection in Rennes metropolitan area
International audience This paper is concerned with the estimation of the dominant orientation of textured patches that appearin a number of images (remote sensing, biology or natural sciences for instance). It is based on the maximizationof a criterion that deals with the coefficients enclosed in t...
Paris – London: empirical philosophy, invention and the Hartlib Circle
Using the papers of Samuel Hartlib, the author examines the empirical research into the natural world affected in France and England during the early 17th century, the making of the instruments needed for this research, and the transmission of technical ideas between France and England.
Variation in phenotypic response to light availability between diploid and tetraploid populations of the perennial grass Arrhenatherum elatius from open and woodland sites
International audience 1 Phenotypic plasticity and genetic differentiation may influence how natural populations colonize variable environments, and thus help explain differences in distribution of closely related taxa. The response to shading in woodland and open habitat populations of endemic dipl...
Thermal-Induced Wear Mechanisms of Sheet Nacre in Dry Friction
International audience Sheet nacre is a natural biocomposite with a multiscale structure including a mineral phase of calcium carbonate (97 wt.%) and two organic matrices (3 wt.%). The mineral phase is constituted by an arrangement of CaCO3 biocrystal nanograins (ca 40 nm in size) drowned in an ‘‘in...
Quantification and kinetics of H2 generation during hydrothermal serpentinisation experiments
International audience H2-rich hydrothermal fluids generated by serpentinisation of mantle rocks at slow-spreading ridges have been revealed by recent studies [1, 2]. Fluxes and the future of the H2 produced by this process are poorly constrained [1, 3]. In this study, we aim to quantitatively evalu...
Fine-tuning tomato agronomic properties by computational genome redesign
The Pogroms in Ukraine, 1918-19
"It is increasingly clear that the shapes of reality – whether of the natural world, or of the built environment – are in some profound sense mathematical. Therefore it would benefit students and educated adults to understand what makes mathematics itself ‘tick’, and to appreciate why its shapes, pa...
Empirical investigation of indexical externalism about “social-kind” terms
Portuguese Language Teaching and Nature Sciences in the Early Years: a case study of teachers' teaching practice
Neste texto apresenta-se resultado de pesquisa realizada em Programa de Pós-Graduação Strictu Sensu, cujo objetivo foi analisar as práticas de ensino de duas professoras nos anos iniciais do Ensino Fundamental (EF) quando ensinam Língua Portuguesa e Ciências, procurando detectar se há ou não converg...
Building a Model to Reconstruct the Hellenistic and Roman Road Networks of the Eastern Desert of Egypt, a Semi-Empirical Approach Based on Modern Travelers’ Itineraries
International audience The Egyptian Eastern Desert, the part of the Sahara Desert that connects the Nile and the Red Sea, is rich in natural resources and meshed with multiple networks. The adoption of the camel as the main mode of transportation in the 1st millennium BC, faster and with a greater l...
Analysis of the local perception of multi-risks in the region of North-Morocco, Alboran Domain and Gibraltar Arc.
Climate variability in the subarctic area for the last 2 millennia
(IF 3.47; Q1)
Seismic vulnerability assessment of urban environments in moderate-to-low seismic hazard regions using association rule learning and support vector machine methods
International audience The estimation of the seismic vulnerability of buildings at an urban scale, a crucial element in any risk assessment, is an expensive, time-consuming, and complicated task, especially in moderate-to-low seismic hazard regions, where the mobilization of resources for the seismi...
Biomarker distribution along a pedosequence recording a transition from pasture to conifer forest (Massif Central, France)
International audience Anticipating the consequences of future global changes on natural systems requires the understanding of the responses of past ecosystems under climatic and anthropic constraints. As natural archives, soils are particularly relevant since they potentially preserve indications o...
Primary marine aerosol physical flux and chemical composition during a nutrient enrichment experiment in mesocosms in the Mediterranean Sea
International audience While primary marine aerosol (PMA) is an important part of global aerosol total emissions, its chemical composition and physical flux as a function of the biogeochemical properties of the seawater still remain highly uncharacterized due to the multiplicity of physical, chemica...
Adaptive measures for mountain Mediterranean forest ecosystem services under climate and land cover change in the Mont-Ventoux natural Regional Park, France
International audience Climate change (CC) and land use and land cover change (LULCC) threaten Mediterranean forests and the ecosystem services (ES) they provide. In complex socio-ecological systems and under high uncertainties, the resilience of ES has become the target objective for adaptive manag...
OC6 Phase I : Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine
International audience Phase I of the OC6 project is focused on examining why offshore wind design tools underpredict the response (loads/motion) of the OC5-DeepCwind semisubmersible at its surge and pitch natural frequencies. Previous investigations showed that the underprediction was primarily rel...
Agent-based modeling and genetics reveal the Limfjorden, Denmark, as a well-connected system for mussel larvae
International audience Fishery of blue mussels Mytilus edulis constitutes a very important economic activity in Denmark, whereas mussel farming on long-lines or nets is a new, growing sector. Spawning from natural mussel beds takes place during early summer, and larvae disperse via water currents be...