نتایج جستجو برای: computational phantoms

تعداد نتایج: 274208  

2005
S. K. Srivastava

Here, an accelerated phantom model for the late universe is explored, which is free from future singularity. It is interesting to see that this model exhibits strong curvature for all time in future, unlike models with 'sudden future singularity' showing high curvature near singularity time only. So, quantum gravity effects be dominant as time increses in late universe too. More importantly, it...

2006
S. K. Srivastava

Here, an accelerated phantom model for the late universe is explored, which is free from future singularity. It is interesting to see that this model exhibits strong curvature for all time in future, unlike models with 'sudden future singularity' showing high curvature near singularity time only. So, quantum gravity effects grow dominant as time increses in late universe too. More importantly, ...

2004
Madoka BABA Aki ISHII Yukihisa SUZUKI Soichi WATANABE Masao TAKI

High-molecular gel containing capsulate thermo-chromic liquid crystal is made to visualize three-dimensional distribution of electromagnetic power absorption. A preliminary experiment is performed at frequency of 1.5GHz. As a result of the experiment, the three-dimensional distribution of electromagnetic power absorption is clearly visualized. The result shows that the gel can be used as a phan...

2008
Iver Brevik

Singularities in the dark energy late universe are discussed, under the assumption that the Lagrangian contains the Einstein term R plus a modified gravity term R, where α is a constant. The 4D fluid is taken to be viscous and composed of two components, one Einstein component where the bulk viscosity is proportional to the scalar expansion θ, and another modified component where the bulk visco...

2004
Zu-Yao Sun You-Gen Shen

We find that the expansion of the universe is accelerating by analyzing the recent observation data of type Ia supernova(SN-Ia) .It indicates that the equation of state of the dark energy might be smaller than -1,which leads to the introduction of phantom models featured by its negative kinetic energy to account for the regime of equation of state parameter w < −1.In this paper the possibility ...

2008
K. D. Brewer C. V. Bowen S. D. Beyea

Figure 3: Spiral-In and Spiral-Out raw images in a human brain (24cm x 24cm, a-c) and cylindrical phantom placed perpendicular to B0 (6cm x 6cm, d-f). The various TEs are a) Spiral-Out 18ms, b) Spiral-In 30ms, c) Spiral-In 42ms, d) Spiral-Out 7.4ms, e) SpiralIn 30ms and f) Spiral-In 52.6ms. Figure 1: R2* map of cylindrical phantom filled with tubes containing materials with varying R2* (arrow i...

2008
Freddy P. Zen

The impact of Lorentz violation on the dynamics of a scalar field is investigated. In particular, we study the dynamics of a scalar field in the scalar-vector-tensor theory where the vector field is constrained to be unity and time like. By taking a generic form of the scalar field action, a generalized dynamical equation for the scalar-vector-tensor theory of gravity is obtained to describe th...

2008
A. Delgado

A renormalizable coupling between the Higgs and a scalar unparticle operator OU of non-integer dimension dU < 2 gives rise, after electroweak symmetry breaking, to a mass gap in the unparticle continuum and a shift in the original Higgs mass, which can end up above or below the mass gap. We show that, besides the displaced Higgs state, a new isolated state can generically appear in the spectrum...

2006
Ratna Koley Sayan Kar

Six dimensional bulk spacetimes with 3– and 4–branes are constructed using certain non– conventional bulk scalars as sources. In particular, we investigate the consequences of having the phantom (negative kinetic energy) and the Brans–Dicke scalar in the bulk while obtaining such solutions. We find geometries with 4–branes with a compact on–brane dimension (hybrid compactification) which may be...

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