Dark bubbles: decorating the wall

Bubbles from Dark Energy ?

In a model recently proposed by Albrecht and Skordis it was suggested that the observed accelerated expansion of the universe could be caused by a scalar field which is trapped in a local minimum of an exponential potential modified by a polynomial prefactor. We show that scalar field cosmologies with this kind of local minimum in the potential are stable and do not decay to the true vacuum if ...

Back to the Wall: Home Video and Digital Decorating

This paper describes the experimental use of home video images as source materials for home decoration, It includes a brief description of the reasons for the experiment, as well as the equipment and software used. The remainder of the paper examines issues raised by the potentials offered by the availability of film titles in electronic form, and their use as sources in digital media. Shortly ...

Bubbles breaking the wall: Two-dimensional stress and stability analysis.

Submerged granular material exhibits a wide range of behavior when the saturating fluid is slowly displaced by a gas phase. In confined systems, the moving interface between the invading gas and the fluid/grain mixture can cause beads to jam, and induce intermittency in the dynamics. Here, we study the stability of layers of saturated jammed beads around stuck air bubbles, and the deformation m...

Decorating proofs

We consider proofs in minimal logic, written in natural deduction style. The only rules are introduction and elimination for implication and the universal quantifier. The logical connectives ∃,∧ are seen as special cases of inductively defined predicates, and hence are defined by the introduction and elimination schemes ∀x(A→ ∃xA), ∃xA→ ∀x(A→ B)→ B (x not free in B), A→ B → A ∧B, A ∧B → (A→ B →...

Direct Numerical Simulation of Wall Turbulence with Bubbles