We show that the introduction of a hyperbolic phase for Brans-Dicke (BD) field results in a flat vacuum cosmological solution of Hubble parameter H and fractional rate of change of BD scalar field, F which asymptotically approach constant values. At late stages, hyperbolic phase of BD field behaves like dark matter. Can hyperbolic phase of Brans-Dicke field account for Dark Matter? 2

In this paper, we have studied Brans-Dicke Cosmology in anisotropic Kantowski-Sachs spacetime model; considering variation of the velocity of light. We have addressed the flatness problem considering both the cases namely, (i) when the Brans-Dicke scale field φ is constant (ii) when φ varies, specially for radiation dominated era perturbatively and non-perturbatively and asymptotic behaviour ha...

We consider the general behaviour of cosmologies in Brans-Dicke theory where the dilaton is self-interacting via a potential V (Φ). We show that the general radiation universe is a two-dimensional dynamical system whereas the dust or false vacuum universe is threedimensional. This is in contrast to the non-interacting dilaton which has uniformly a two-dimensional phase space. We find the phase ...

We present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, ...

in disorders of calcium metabolism. Ann Clin Biochem 1988;25:367-82. 2. Sherwood LM. Vitamin D, parathyroid hormone, and renal failure. N Engl J Med 1987;316:1601-2. 3. Malluche HH, FaugereMC. Renal osteodystrophy. N Engi J Med 1989;321:317-9. 4. Andress DL, Norris KC, Coburn JW, Slatopolsky EA, Sherrard DJ. Intravenous calcitrol in the treatment of refractory osteitis fibrosa of chronic renal ...

Please cite this article as: Artal R, et al. Neumoencéfalo frontal sintomático secundario a displasia fibrosa sinusal. Acta Otorrinolaringol Esp. 2011;62:251--2. ∗ Corresponding author. E-mail address: [email protected] (R. Artal). with ideational slowness, motor aphasia, agraphia, acalculia and worsening of the headache. He underwent a brain CT scan, which revealed significant pneumoceph...