Avant-propos. Pour des musicien·ne·s organiques ?

Avant Propos

Avant-propos.

Kantorovitch's theorem gives su cient conditions for the convergence of Newton's method. We presenta full formalization of this theorem in the case of a real function. The work is accomplished inside the Coqproof assistant and it is based on the Reals library provided by the theorem prover. For the general case ofthe theorem we rst describe a way to represent concepts from multivari...

Fissuration à chaud : des alliages organiques aux superalliages

Hot tearing: from organic alloys to superalloys. The appearance of solidification cracks or hot tears during casting is a serious defect. EPF-Lausanne has developed a criterion for the appearance of hot tears which is based upon a mass balance performed over the liquid and solid phases and which takes into accounts for the tensile deformation of the solid skeleton perpendicular to the growing d...

Fractionnement des lipides du sérum sanguin par les solvants organiques

Propriétés optiques non linéaires du 3e ordre des milieux organiques

2014 Optical nonlinear properties of semiconducting organic polymers with one dimensional 03C0 electron system are described. The third order nonlinear susceptibility of these polymers is specially high (#10-10 esu) and their time response very short (~ 1 ps ). Three and two photon resonances due to even and odd parity excited states are observed by third harmonic generation (THG) and by electr...