Projets Terminés

Soils contain three times more carbon than atmosphere, as organic matter emitting greenhouse gases. However, current models do not satisfactorily predict soil organic matter biodegradation, particularly in the context of climate change. A proposed explanation is that these models consider soil as a black box and do not take into account how organisms function in their habitat, which is a complex and heterogeneous network of pores, partially filled with water and air, ...  En savoir plus ...

Estimer la connectivité, c’est-à-dire l’échange d’individus, entre aires marines protégées (AMP), est indispensable pour pouvoir déterminer si ces AMP constituent des entités séparées ou bien si elles forment un véritable réseau, renforçant ainsi leur impact individuel. Étudier la connectivité entre habitats fragmentés permet aussi de mieux connaître et comprendre la dynamique et la structuration spatiale des populations marines. Pour les organismes marins ...  En savoir plus ...

Agent-based social simulation is gaining ground as a candidate of choice for building decision-support tools in the management of complex socio-environmental systems, and the resulting models are therefore being driven to produce more realistic outcomes. Hence, integrating large data corpuses (demographical, environmental, geographical...) as an input to these models becomes more critical ...  En savoir plus ...

During the last century, WHO have led public health interventions that resulted in spectacular achievements such as the worldwide eradication of smallpox and the elimination of malaria from the Western world. However, besides major successes achieved in control of infectious diseases, most elimination/control programs remain frustrating in many tropical countries where specific biological and socio-economical features have prevented implementation of ... En savoir plus ...

Studies of infectious disease systems have typically tended to focus solely on the interaction between the host and the causative agent. This approach, inherited from medical methodology, has served epidemiologists well. Indeed, it has allowed understanding how pathogen spread through space (Grenfell, Bjornstad, & Kappey, 2001) and time (Keeling & Grenfell, 1997) in order to inform public health policies. En savoir plus ...

Researchers in several institutions are currently attempting to understand how the microscale heterogeneity of soils influences the activity of microorganisms and the fate of organic matter, whose mineralization could have a significant effect on climate change. In Qatar, similar preoccupations arise about the microscale heterogeneity of porous media, but for reasons that are very different. Indeed, here, the need to understand better how the complex geometry ...  En savoir plus ...