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Para-Kahler tangent bundles of constant para-holomorphic sectional curvature

We characterize the natural diagonal almost product (locally product) structures on the tangent bundle of a Riemannian manifold. We obtain the conditions under which the tangent bundle endowed with the determined structure and with a metric of natural diagonal lift type is a Riemannian almost product (locally product) manifold, or an (almost) para-Hermitian manifold. We find the natural diagona...

On $(epsilon)$ - Lorentzian para-Sasakian Manifolds

The object of this paper is to study $(epsilon)$-Lorentzian para-Sasakian manifolds. Some typical identities for the curvature tensor and the Ricci tensor of $(epsilon)$-Lorentzian para-Sasakian manifold are investigated. Further, we study globally $phi$-Ricci symmetric and weakly $phi$-Ricci symmetric $(epsilon)$-Lorentzian para-Sasakian manifolds and obtain interesting results.

Para-Sprue

Para-Sprue

Modelos animales para VIH/SIDA: ¿la clave para una vacuna?

Animal Models for HIV/AIDS: The Key for a Vaccine? The development of a protective vaccine against HIV-1/AIDS is the only hope to control this pandemic. One of the main obstacles to achieve this goal is the lack of an appropriate animal model. The models that have been used so far can be classified into two main groups: 1) small animals and 2) primates. Regarding the former, several unsuccessfu...