Encuentros en Second Life : presentación y explotación didáctica del E-LE en Second Life de acuerdo con los diferentes niveles del MCEL.

Se reflexiona sobre el uso de nuevas tecnologías, especialmente la virtual y muy específicamente en el mundo virtual de Second Life (SL), donde el Instituto Cervantes tiene representada su institución en una de las islas que componen dicho mundo. Se explica qué es Second Life y como se puede introducir y explotar en el aprendizaje de segundas lenguas proporcionando, además, una visita guiada. Se desarrollan actividades comunicativas para los niveles A1, A2, B1, B2 y C1.

Second Life : más que publicidad en un videojuego.

Se analizan las características publicitarias que rodean al mundo del videojuego, mencionando los diferentes modos que se emplean para la inclusión de la publicidad y los tipos de consumidores de videojuegos existentes. Se analiza el caso concreto de Second Life y se ofrecen una serie de actividades para analizar los videojuegos y descubrir cuáles son sus 'mensajes ocultos'. Por último, se propone una escala de baremación de valores que emergen de la publicidad en los videojuegos para favorecer la discusión y el análisis crítico de la publicidad.

Incorporación de las TIC a la educación mediante el uso de los videojuegos y el chat (el caso de Second Life).

Monográfico con el título: 'Aplicabilidad de las TIC a la educación escolar'

El uso de metaversos en el mundo educativo : Gestionando conocimiento en Second Life.

Resumen basado en el de la publicación

Second Life en el aprendizaje de idiomas y la interacción social

Resumen en inglés. Resumen basado en el de la publicación. Capítulo incluido en el monográfico número 8 de la revista 'Tejuelo. Didáctica de la lengua y la literatura. Educación', titulado 'Comunicación social y educación'

La construcción identitaria de Second Life : contradicciones desde el contexto educativo

El artículo forma parte de un monográfico titulado Jóvenes sin red.

Anharmonicity contributions to the vibrational second hyperpolarizability of conjugated oligomers

Restricted Hartree-Fock 6-31G calculations of electrical and mechanical anharmonicity contributions to the longitudinal vibrational second hyperpolarizability have been carried out for eight homologous series of conjugated oligomers - polyacetylene, polyyne, polydiacetylene, polybutatriene, polycumulene, polysilane, polymethineimine, and polypyrrole. To draw conclusions about the limiting infinite polymer behavior, chains containing up to 12 heavy atoms along the conjugated backbone were considered. In general, the vibrational hyperpolarizabilities are substantial in comparison with their static electronic counterparts for the dc-Kerr and degenerate four-wave mixing processes (as well as for static fields) but not for electric field-induced second harmonic generation or third harmonic generation. Anharmonicity terms due to nuclear relaxation are important for the dc-Kerr effect (and for the static hyperpolarizability) in the σ-conjugated polymer, polysilane, as well as the nonplanar π systems polymethineimine and polypyrrole. Restricting polypyrrole to be planar, as it is in the crystal phase, causes these anharmonic terms to become negligible. When the same restriction is applied to polymethineimine the effect is reduced but remains quantitatively significant due to the first-order contribution. We conclude that anharmonicity associated with nuclear relaxation can be ignored, for semiquantitative purposes, in planar π-conjugated polymers. The role of zero-point vibrational averaging remains to be evaluated

The curvature of the conical intersection seam: an approximate second-order analysis

We present a method for analyzing the curvature (second derivatives) of the conical intersection hyperline at an optimized critical point. Our method uses the projected Hessians of the degenerate states after elimination of the two branching space coordinates, and is equivalent to a frequency calculation on a single Born-Oppenheimer potential-energy surface. Based on the projected Hessians, we develop an equation for the energy as a function of a set of curvilinear coordinates where the degeneracy is preserved to second order (i.e., the conical intersection hyperline). The curvature of the potential-energy surface in these coordinates is the curvature of the conical intersection hyperline itself, and thus determines whether one has a minimum or saddle point on the hyperline. The equation used to classify optimized conical intersection points depends in a simple way on the first- and second-order degeneracy splittings calculated at these points. As an example, for fulvene, we show that the two optimized conical intersection points of C2v symmetry are saddle points on the intersection hyperline. Accordingly, there are further intersection points of lower energy, and one of C2 symmetry - presented here for the first time - is found to be the global minimum in the intersection space

Second-order Møller-Plesset perturbation theory without basis set superposition error : II : open-shell systems

The basis set superposition error-free second-order MØller-Plesset perturbation theory of intermolecular interactions was studied. The difficulties of the counterpoise (CP) correction in open-shell systems were also discussed. The calculations were performed by a program which was used for testing the new variants of the theory. It was shown that the CP correction for the diabatic surfaces should be preferred to the adiabatic ones