Messinian coral reefs and erosion surfaces in Cabo de Gata (Almeria, Spain)

Excellent exposures in Cabo de Gata area reveal two major Messinian depositional sequences, the Reef Complex and the Terminal Complex, which are overlying a complicated erosional morphology with several terraces on the volcanic basement. A typical Porites reef developed on the 200 m platform and originated extense fore slope deposits adosed to the terraced volcanic basernent. This Reef Complex is severely truncated by an important erosion surface, which also presents a terraced morphology (80,160,220 m) and follows similar trends than the erosion surface on the volcanic basement. This intra-Messinian erosion surface is onlaped by the Terminal Complex, consisting in alternating layers of oolites, stromatolites and Porites thickets. Hypothetically, layers of evaporites could had been associated to the stromatolites in the lower section of the Terminal Complex before the pre-Pliocene erosional episode

Accurate nonrelativistic ground-state energies of 3d transition metal atoms

We present accurate nonrelativistic ground-state energies of the transition metal atoms of the 3d series calculated with Fixed-Node Diffusion Monte Carlo (FN-DMC). Selected multi-determinantal expansions obtained with the CIPSI method (Configuration Interaction using a Perturbative Selection made Iteratively) and including the most prominent determinants of the full CI expansion are used as trial wavefunctions. Using a maximum of a few tens of thousands determinants, fixed-node errors on total DMC energies are found to be greatly reduced for some atoms with respect to those obtained with Hartree-Fock nodes. The FN-DMC/(CIPSI nodes) ground-state energies presented here are, to the best of our knowledge, the most accurate values reported so far. Thanks to the variational property of FN-DMC total energies, the results also provide lower bounds for the absolute value of all-electron correlation energies, $|E_c|$.Comment: 5 pages, 3 table

Non-noble electrocatalysts for alkaline fuel cells

The doping of solid phase precursors followed by pyrolysis or the copyrolysis of gas phase precursors has allowed us to produce catalysts with good activity toward oxygen reduction. Efforts are currently underway to better understand the reasons for the catalytic activity of the bulk doped catalysts with a view toward further improving their activity

Messinian coral reefs and erosion surfaces in Cabo de Gata (Almeria, SE Spain)

Los excelentes afloramientos de este área revelan dos grandes secuencias deposicionales en el Messiniense, el Complejo Arrecifal y el ComplejoTerminal, las cuales recubren una complicada morfología erosional con varias terrazas sobre el basamento volcanico. En la plataforma de 200 m se desarrolló un típico arrecife de Porites que originó extensos depósitos de talud adosados a las terrazas del basamento volcánico. Este Complejo Arrecifal está profundamentetruncado por una importante superfície de erosión, la cual también presenta una morfología de terrazas (80, 160, 220 m) siguiendo una tendencia similar a la superficie de erosión sobre el basamento volcánico. Esta superfície de erosión intra-Messiniense está solapada expansivamente (onlapada) por el complejo Terminal, el cual consiste en capas alternantes de oolitos, estromatolitos y biostromas de Porites. Hipotéticamente, en las partes mas bajas del Complejo Terminal, capas de evaporitas pudieran haber estado asociadas con los estromatolitos antes del episodio erosional pre-Plioceno

Several new catalysts for reduction of oxygen in fuel cells

Test results prove nickel carbide or nitride, nickel-cobalt carbide, titanium carbide or nitride, and intermetallic compounds of the transition or noble metals to be efficient electrocatalysts for oxygen reduction in alkaline electrolytes in low temperature fuel cells

Resonant hyper-Raman scattering in spherical quantum dots

A theoretical model of resonant hyper-Raman scattering by an ensemble of spherical semiconductor quantum dots has been developed. The electronic intermediate states are described as Wannier-Mott excitons in the framework of the envelope function approximation. The optical polar vibrational modes of the nanocrystallites (vibrons) and their interaction with the electronic system are analized with the help of a continuum model satisfying both the mechanical and electrostatic matching conditions at the interface. An explicit expression for the hyper-Raman scattering efficiency is derived, which is valid for incident two-photon energy close to the exciton resonances. The dipole selection rules for optical transitions and Fr\"ohlich-like exciton-lattice interaction are derived: It is shown that only exciton states with total angular momentum $L=0,1$ and vibrational modes with angular momentum $l_p=1$ contribute to the hyper-Raman scattering process. The associated exciton energies, wavefunctions, and vibron frequencies have been obtained for spherical CdSe zincblende-type nanocrystals, and the corresponding hyper-Raman scattering spectrum and resonance profile are calculated. Their dependence on the dot radius and the influence of the size distribution on them are also discussed.Comment: 12 pages REVTeX (two columns), 2 tables, 8 figure

Community, Autonomy and Divinity Scale items and coding, English version, 2011: Scale validated in Guerra and Giner-Sorolla (Journal of Cross-Cultural Psychology, 2010)

This document presents the scale items and a revised instruction protocol for this scale, intended to measure endorsement of the three factors in Shweder's CAD model of morality