We present a simple model in which the weak energy condition is violated for spatially homogeneous, slowly evolving fields. The excitations about Lorentz-violating background in Minkowski space do not contain ghosts, tachyons or superluminal modes at spatial momenta ranging from some low scale ǫ to the UV cutoff scale, while tachyons and possibly ghosts do exist at p2 < ǫ2. We show that in the ...

Dosimetric modeling of radiation transport in skeletal bone tissues using computational phantoms provides the doses internal exposure to active marrow. Computational ICRP are created for reference people with anatomical and physiological characteristics typical an average individual. The calculated such will correspond certain population-average values. Individual variability introduce a stocha...

The possibility to directly and non-invasively localize neuronal activities in the human brain, as for instance by performing current imaging (NCI) via magnetic resonance (MRI), would be a breakthrough neuroscience. In order assess feasibility of 3-dimensional (3D) NCI, comprehensive computational physical phantom experiments using low-noise ultra-low-field (ULF) MRI technology were performed t...

In this letter, we have considered the universe is filled with the mixture of tachyonic field and scalar or phantom field. If the tachyonic field interacts with scalar or phantom field, the interaction term decays with time and the energy for scalar field is transferred to tachyonic field or the energy for phantom field is transferred to tachyonic field. The tachyonic field and scalar field pot...

We here investigate the model of interacting dark energy in the context of five dimensional brane cosmology. The effective equations of state of dark energy are evaluated for various choices of the variable time dependent cosmological constant. We have found that the interacting dark energy obeys the phantom divide/crossing scenario in this generalized model. It is also shown that interacting d...

In a previous article,1 we discussed some of the basic tax considerations investors face in lawsuits. We concluded that debt treatment tends to be unfavorable to an investor because income is ordinary and the investor may even be required to accrue phantom income. Outside the debt context, we observed, the investor tends to be indifferent as to whether the arrangement is a prepaid forward contr...

In this comment we discuss big rip singularities occurring in typical phantom models by violation of the weak energy condition. After that, we compare them with future late-time singularities arising in models where the scale factor ends in a constant value and there is no violation of the strong energy condition. In phantom models the equation of state is well defined along the whole evolution...

It is known that essential phantom mappings (of the second kind) between connected CW-complexes do exist. However, it appears that in the literature there are few explicit examples of such mappings. One usually finds descriptions of the domain and the codomain and an existence proof that the set of homotopy classes of mappings from the domain to the codomain is infinite. The purpose of the pres...