LITTLE RIP AND PSEUDO RIP PHENOMENA FROM COUPLED DARK ENERGY

Bigger Rip with No Dark Energy Paul

By studying a modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length L(t), we consider cosmological models where the scale factor diverges with an essential singularity at a finite future time. Such models have no dark energy in the conventional sense of energy possessing a truly simple pressure-energy relationship. ...

Enhanced Big Rip without Conventional Dark Energy # 1 Paul

A modified Friedmann equation which arises in an extension of general relativity which accommodates a time-dependent fundamental length L(t) leads to cosmological models where the scale factor diverges with an essential singularity at a finite future time. Such models have no dark energy in the conventional sense of energy possessing a truly simple pressure-energy relationship. Data on supernov...

Arie Rip

Rip Currents

Scientific T To examine the spatial and temporal variability of rip currents using remote video imaging techniques. T To quantify changes in nearshore circulation and topography in response to varying incident wave conditions at different time scales including; P wave groupiness (time scales of 1-10 minutes), P tidal modulation (time scales of 12h and 24 h) and P wave height fluctuations associ...

Cosmological Evolution of Hessence Dark Energy and Avoidance of the Big Rip

Recently, many dark energy models whose equation-of-state parameter can cross the phantom divide wde = −1 have been proposed. In a previous paper [Class. Quant. Grav. 22, 3189 (2005); hep-th/0501160], we suggest such a model named hessence, in which a non-canonical complex scalar field plays the role of dark energy. In this work, the cosmological evolution of the hessence dark energy is investi...