0000000000892986
AUTHOR
Elisabeth Lemaire
Interdisciplinarité et recherche opérationnelle sur le paysage : l'exemple du potentiel ornitho-écologique du pays d'Apance-Amance en Haute-Marne
Landscape is a major object concerned by sustainable development. Thus, this study aims to explore the relationship between landscape and biodiversity. It is a contribution to a local land planning operation on the Apance-Amance area (Haute-Marne, France). Different ornitho-ecological units are defined by field investigations and then classification processing. This one leads us to identify some discriminant landscape criteria related to each ornitho-ecological unit. Then, the link between the recognized landscape criteria and different G.I.S. information layers is established. Most of the used data are obtained from a satellite image (SPOT XS+P channels) and a digital elevation model. The …
Experimental and Theoretical Study of the Field Induced Phase Separation in Electro- and Magnetorheological Suspensions
We present here the study of field induced phase separation in E.R. and M.R. fluids. Two thermodynamic models — one for the formation of chais of particles and the other for phase separation are presented and compared with experimental results obtained with two kinds of suspensions. One was made of silica particles in silicone oil and the other was made of magnetic polystyrene particles in water. In the presence of a flow the phase separation occurs with the dense phase forming a regular pattern of stripes. The dependence of the period of these stripes on the intensity of the magnetic field is well reproduced by the same kind of thermodynamic model if we add the effect of normal stresses i…