A total lunar eclipse is plausible to have an influence on the variation of some environmental physical parameters, specifically conditions sky brightness, humidity and temperature. During 14$^{th}$-15$^{th}$ April 2014, these parameters were measured through a photometer weather station. The obtained results allow comparison, practically, optimal for observational astronomy work in Tatacoa des...

We propose a novel mechanism to test time variation of the propagation speed gravitational waves (GWs) in light GWs astronomy. As stochastic experience whole history cosmic expansion, they encode potential observational evidence such variation. report that, one feature varying is that energy spectrum will present resonantly-enhanced peaks if oscillates at high-energy scales. Such oscillatory be...

This paper presents and philosophically assesses three types of results on the observational equivalence of continuous-time measure-theoretic deterministic and indeterministic descriptions. The first results establish observational equivalence to abstract mathematical descriptions. The second results are stronger because they show observational equivalence between deterministic and indeterminis...

Subtyping in first order object calculi is studied with respect to the logical semantics obtained by identifying terms that satisfy the same set of predicates, as formalized through an assignment system. It is shown that equality in the full first order ς-calculus is modelled by this notion, which on turn is included in a Morris style contextual equivalence.