9 research outputs found
Vacuum Bubble in an Inhomogeneous Cosmology
We study the propagation of bubbles of new vacuum in a radially inhomogeneous
Lemaitre-Tolman-Bondi background that includes a cosmological constant. This
exemplifies the classical evolution of a tunneling bubble through a metastable
state with curvature inhomogeneities, and will be relevant in the context of
the Landscape. We demand that the matter profile in the LTB background satisfy
the weak energy condition. For sample profiles that satisfy this restriction,
we find that the evolution of the bubble (in terms of the physically relevant
coordinates intrinsic to the shell) is largely unaffected by the prsence of
local inhomogeneities. Our setup should also be a useful toy model for
capturing the effects of ambient inhomogeneities on an inflating region.Comment: 31 pages, 21(!) figures, v2: minor changes, figures re-sized (might
require zoom on some systems), references adde
Diversity and localization of bacterial symbionts in three whitefly species (Hemiptera: Aleyrodidae) from the east coast of the Adriatic Sea
Multi-stakeholder decision-making in the risk-based design of a RO-PAX double bottom for grounding
Wild dances and dying wolves: simulation, essentialization, and national identity at the Eurovision Song Contest
This paper examines Eurovision as a site for the public representation of the nation and explores the tendency towards simulation in such representations. The contest’s transnational audience and implication in commercial practices create pressures towards representing the nation through simplified, well-known images. A critique of globalization from south-east Europe argues that cultural production from marginalized countries which emphasizes local distinctiveness is a sign of structural inequality. This critique is tested against representational strategies from Ukraine, Bosnia-Herzegovina, Serbia and Croatia. Eurovision is then related to tourism through an analysis of the representation of the Mediterranean in Eurovision performances, which reflect symbolic hierarchies constructed by travel writing since the Enlightenment. Finally, the paper considers the overarching representational power exerted by host states