Scalar-tensor cosmologies with a potential in the general relativity limit: time evolution

We consider Friedmann-Lema\^{\i}tre-Robertson-Walker flat cosmological models in the framework of general Jordan frame scalar-tensor theories of gravity with arbitrary coupling function and potential. For the era when the cosmological energy density of the scalar potential dominates over the energy density of ordinary matter, we use a nonlinear approximation of the decoupled scalar field equation for the regime close to the so-called limit of general relativity where the local weak field constraints are satisfied. We give the solutions in cosmological time with a particular attention to the classes of models asymptotically approaching general relativity. The latter can be subsumed under two types: (i) exponential convergence, and (ii) damped oscillations around general relativity. As an illustration we present an example of oscillating dark energy.Comment: 10 pages, 1 figur

Conifold Cosmologies in IIA String Theory

We discuss the extension of our recent work hep-th/0410272, hep-th/0410273 to general conifold transitions and type-IIA string theory.Comment: 8 pages, 4 figures, contributed to the proceedings of the 37-th International Symposium Ahrenshoop, Berlin, August 23-27, 200

The Singing Wolf Meets His Kin Abroad. Web-based databases of the Estonian Folklore Archives

Els folkloristes estonians han creat diverses bases de dades en local, a més d’un parell de desenes de bases de dades en línia per facilitar la tasca de la recerca i incrementar l’accessibilitat al material d’arxiu. Aquest treball proporciona una visió general de quatre bases de dades en línia gestionades pels investigadors dels Arxius de Folklore d’Estònia: cançons rúniques, el folklore local, jocs infantils i rondalles. D’una banda, aquestes bases de dades es poden fer servir per a finalitats de recerca i per preparar textos per ser publicats; de l’altra, poden ser d’interès per a molta altra gent no especialitzada. Tenint en compte que s’han preparat durant un llarg període de temps i que algunes s’han elaborat a partir d’una base de dades en local, els principis que regeixen el funcionament poden ser diferents