The present manuscript presents a framework for automating the formulation and resolution of limit analysis problems in a very general manner. This framework relies on FEniCS domain-specific language and the representation of material strength criteria and their corresponding support function in the conic programming setting. Various choices of fin...
This contribution is addressing the ultimate limit state design of massive three-dimensional reinforced concrete structures based on the finite element implementation of both the upper and lower bound methods of yield design. The strength properties of plain concrete are modelled by means of a tension cutoff Mohr Coulomb condition, while the contri...
Efficiency in use of non-renewable resources is becoming critical to favor sustainability and resilience goals of agricultural systems. In Southern Mediterranean countries, agricultural development leads to environmental concerns such as water-table decrease due to over-irrigation, and water pollution, together with issues related to the unequal ac...
We study experimentally the rheological behavior of carbon black (CB) suspensions in water, at different ionic strengths and concentrations. We show by means of standard rheometry completed by local MRI-rheometry that these suspensions first appear to be thixotropic yield stress fluids: they exhibit a yield stress increasing with the time of rest, ...
International audience
The labor shortage, the need to increase the forest density and the great increase in surface for planting trees has led to a reflection in R&D. This article discusses the abilities of a tree planting machine which works automatically. The need to design this type of machine was due to the massive exploitation of forests done by the wood industry a...
Dans les années 1980, la gestion forestière des autorités fédérales aux États-Unis a été remise en cause dans une controverse qui s'est cristallisée autour de la chouette tachetée nordique. À partir d'une revue critique des arguments écologiques utilisés dans la controverse et des enjeux socio-politiques de cette polémique, cet article met en évide...
In Sudano-Sahelian agriculture, organic amendments are often limited by resource availability. Small branches (ramial wood, RW) represent an organic resource found in many landscapes but little is known about their effects. This field trial (2007–2009) studied the effects of RW or straw at low application rate (0.69 Mg C ha−1 year−1) on topsoil car...
In Sudano-Sahelian agriculture, organic amendments are often limited by resource availability. Small branches (ramial wood, RW) represent an organic resource found in many landscapes but little is known about their effects. This field trial (2007–2009) studied the effects of RW or straw at low application rate (0.69 Mg C ha−1 year−1) on topsoil car...
