2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33666The contribution provides the backround of the model of Expansive Nondecelerative Universe, rationalizes the introduction of Vaidya metrics allowing thus to localize and quantify gravitational energy. A unifying explanation of the fundamental physical interactions is accompanied by demonstration of some consequences and predictions relating to cosmological problems.14 pages, LaTeXGeneral Relativity and Quantum Cosmologytext