Tachyon-brane inflationary universe model in the context of a Chaplygin gas equation of state is studied. General conditions for this model to be realizable are discussed. In the high-energy limit and by using an exponential ...

The tachyonic inflationary universe model in the context of intermediate inflation is studied. General conditions for this model to be realizable are discussed. In the slow-roll approximation, we describe in great detail ...

Warm inflationary universe model in a tachyon field theory is studied in the weak dissipation regimen. We develop our model for an exponential potential and a dissipation parameter Γ = Γ0 = constant. We describe scalar and ...

We study one-field open inflationary models in a universe dominated by tachyon matter. In these scenarios, we determine and characterize the existence of the Coleman-De Lucia (CDL) instanton. Also, we study the Lorentzian ...

NO-ABSTRACTIn Volume 6 N°2 (2007) of this Journal, an article on the results of studies carried out in Chile on the use of a new PANDA penetrometer (Pénétromètre Autonome Numérique Dynamique Assisté) for controlling ...

A new extraction method for the determination of tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT) in sediments based on extraction with tartaric acid and methanol has been developed. Tin species were extracted ...

The species of Centris of the hyptidis group are revised. The group, composed by C. hyptidis Ducke, C. hyptidoides Roig-Alsina, and C. thelyopsis n. sp., exhibits unique morphological characters within the genus, like fore- ...