Aim At broad geographical scales, species richness is a product of three basic processes: speciation, extinction and migration. However, determining which of these processes predominates is a major challenge. Whilst palaeontological studies can provide information on speciation and extinction rates, data are frequently lacking. Here we use a recent dated phylogenetic tree of mammals to explore ...

Michael Atlan, Michel Gross, Pierre Desbiolles, Émilie Absil, Gilles Tessier, and Mäıté Coppey-Moisan Laboratoire Kastler-Brossel de l’École Normale Supérieure, CNRS UMR 8552, Université Pierre et Marie Curie Paris 6, 24 rue Lhomond 75231 Paris cedex 05. France École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris, CNRS UPR 5, Université Pierre et Marie Curie Paris 6, 10 ...

(Dated: May 3, 2004) Abstract It is shown how a bare three–nucleon force is incorporated into the formalism of the effective interaction approach for hyperspherical harmonics. As a practical example we calculate the ground state properties of 3H and 3He using the Argonne V18 nucleon–nucleon potential and the Urbana IX three–nucleon force. A very good convergence of binding energies and matter r...

conclusion vr reconstruction for both single-direction images and sushi using dti25 raw data provides excellent 3d displays of the peripheral nerves in the wrist region. sushi post-processing is a useful denoising tool because it automatically reduces the majority of isotropic object noise. results single-direction vr reconstruction clearly showed the nerves for both dti6 and dti25 but with obv...

Polycyclic aromatic hydrocarbons in three sections of a dated sediment core from Buzzards Bay, Massachusetts, have been analyzed by gas chromatographic spectrometry. This historical information suggests that sedimentary polycyclic aromatic hydrocarbons, at least at this location, result primarily from the anthropogenic combustion of fossil fuels.

Paolo Dai Pra, Michele Pavon, Neeraja Sahasrabudhe∗ Dipartimento di Matematica, Università di Padova, via Trieste 63, 35121 Padova, Italy (Dated: April 15, 2013) Abstract Using results of Pitowsky and Gupta, we show in a direct, elementary fashion that, in the case of three spins, Bell’s inequalities indeed provide a representation of the tetrahedron of all spin correlation matrices as intersec...

In this paper, methods of differential geometry and properties of Lie groups are used to show that in any conservative system subjected to a non zero external load, if one examines motions in SE(3), the special Euclidean group of rigid body motions in three dimensions, the resulting 6 ́6 stiffness matrix is asymmetric in any inertial (fixed) or body-fixed reference frame. We prove that in any su...