The dispersion relations and polarizations for the surface waves on infinite planar samples in QHE regime are explicitly determined in the small wavevector limit in which the dielectric tensor can be considered as local. The wavelength and frequency regions of applicability of the results extends up to the infrared region for typical experimental conditions. Then, standard samples with millimet...

Dispersion relations and polarizations for surface waves in infinite planar samples in the QHE regime are explicitly determined in the small wavevector limit in which the dielectric tensor can be considered local. The wavelength and frequency regions of applicability of the results extends to the infrared region for typical experimental conditions. Then, standard samples with millimetric sizes ...

The CDW Hartree-Fock state at half filling and half electron per unit cell is examined. Firstly, an exact solution in terms of Bloch-like states is presented. Using this solution we discuss the dynamics near half filling and show the mass to diverge logarithmically as this filling is approached. We also show how a uniform density state may be constructed from a linear combination of two degener...

—The Cuban subspecies of vampire bat, Desmodus rotundus puntajudensis Woloszyn and Mayo, is redescribed and raised to the specific rank. Desmodus puntajudensis shares some cranial characters with two extinct species of vampire bats from North America, D. stocki and D. archaeodaptes. Characters that distinguish the Cuban species are skull with globose braincase, palate wide with posterior apex w...

La presente comunicación tiene como objetivo analizar la gestión de publicaciones científicas desde Facultad Ciencias Sociales y Humanísticas Universidad Agraria Habana. Se reconoce un alto número investigaciones, siendo escasa visibilidad publicaciones. Mediante una investigación descriptiva-explicativa, perspectivas cuantitativa-cualitativa, el interés recae en desconocimiento teoría estructu...

Dentro del género “literatura de viajes” ocupan un lugar destacado los viajes a las revoluciones políticas y sociales, como la rusa o china. Forman parte esa tradición Revolución cubana, que se iniciaron antes, incluso, triunfo enero 1959. Muchos más connotados escritores periodistas latinoamericanos produjeron notables crónicas su experiencia cubana; cuyo efecto, naturalmente, iría modificando...