Costa, Vera L, Henrique, Rui, Ribeiro, Franclim R, Pinto, Mafalda, Oliveira, Jorge, Lobo, Francisco, ...
Abstract Background Aberrant promoter hypermethylation of cancer-associated genes occurs frequently during carcinogenesis and may serve as a cancer biomarker. In this study we aimed at defining a...
Time, Closed Timelike Curves and Causality (2002)
Lobo, Francisco, Crawford, Paulo
General Relativity is contaminated with non-trivial geometries which generate closed timelike curves. These apparently violate causality, producing time-travel paradoxes. We shall briefly discuss...
Weak energy condition violation and superluminal travel (2002)
Lobo, Francisco, Crawford, Paulo
Recent solutions to the Einstein Field Equations involving negative energy densities, i.e., matter violating the weak-energy-condition, have been obtained, namely traversable wormholes, the...