0000000000931105
AUTHOR
David Langlois
showing 2 related works from this author
Brane cosmology with an anisotropic bulk
2004
In the context of brane cosmology, a scenario where our universe is a 3+1-dimensional surface (the ``brane'') embedded in a five-dimensional spacetime (the ``bulk''), we study geometries for which the brane is anisotropic - more specifically Bianchi I - though still homogeneous. We first obtain explicit vacuum bulk solutions with anisotropic three-dimensional spatial slices. The bulk is assumed to be empty but endowed with a negative cosmological constant. We then embed Z_2-symmetric branes in the anisotropic spacetimes and discuss the constraints on the brane energy-momentum tensor due to the five-dimensional anisotropic geometry. We show that if the bulk is static, an anisotropic brane ca…
New results in the volatile odorous compounds of French cheeses
1990
Les composes volatils odorants de 5 fromages a pâte persillee (3 roqueforts fabriques avec des souches de Penicillium roqueforti differentes, 1 Bleu des Causses et 1 Bleu d'Auvergne) ont ete extraits, separes par chromatographie en phase gazeuse et analyses par spectrometrie de masse. Cent vingt neuf composes ont ete identifies et quantifies