We study a collapsing system attracted by a spherically symmetric gravitational source, with an increasing mass, that generates back-reaction effects that are the source of space–time waves. As an example, we consider an ...

We study the emission of space-time waves produced by back-reaction effects during a collapse of a spherically symmetric universe with a time-dependent cosmological parameter, which is driven by a scalar field. As in a ...

Collapsing glomerulopathy (CG) is a clinicopathologic entity characterized by segmentar or global collapse of the glomerulus and hypertrophy and hyperplasia of podocytes. The Columbia classification of 2004 classified CG ...

We explore a collapsing cosmology driven by a scalar field which is minimally coupled to gravity in a spatially flat and spherically symmetric, isotropic and homogeneous space–time, with a variable timescale that avoid the ...

We study the partial time dependent collapse of a spherically symmetric compact object with initial mass M1+M2 and final mass M2 and the waves of space–time emitted during the collapse via back-reaction effects. We obtain ...