Observable Horizons in the Expanding Universe

Gott-Kaiser-Stebbins (GKS) effect in an accelerated expanding universe

Wewanttofindthecosmologicalconstantinfluenceoncosmicmicrowavebackground(CMB)temperatureduetomovinglinearcosmicstrings.Usingthespace-timemetricofalinearcosmicstringinanacceleratedexpandinguniverse,theGott-Kaiser Stebbins(GKS)effect,asanimportantmechanisminproducingtemperaturediscontinuityinthe(CMB),isconsidered;then,itsmodificationduetotheeffectofthecosmologicalconstantiscalculated.Theresultshowsthat...

Expanding horizons

Evolution of Information and Complexity in an Ever-Expanding Universe

Using the usual definitions of information and entropy in quantum gravity and statistical mechanics and the existing views about the relation between information and complexity, we examine the evolution of complexity in an ever expanding universe.

Expanding the Horizons of ODR

This article offers a brief overview of the state-of-the-art ODR domain by presenting the contributions to the field made by the participants in this volume. It also examines some of the challenges that ODR face at present with regard to interoperability and the new evolutions of the Web 2.0. Finally, it also considers the need for a new vision of ODR that, while keeping pace with the technolog...

Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the universe

We use standard general relativity to illustrate and clarify several common misconceptions about the expansion of the universe. To show the abundance of these misconceptions we cite numerous misleading, or easily misinterpreted, statements in the literature. In the context of the new standard ΛCDM cosmology we point out confusions regarding the particle horizon, the event horizon, the “observab...