Oscillating Phantom in F(R) Gravity

Generation of internal gravity waves by an oscillating horizontal disc

Internal gravity waves are generated in a stratified fluid by arbitrary forced oscillations of a horizontal disc. The wave fields are calculated in both the time domain and the frequency domain. In the time domain, an initial-value problem is solved using Laplace transforms; causality is imposed. In the frequency domain (time-harmonic oscillations), a radiation condition is imposed: a plane-wav...

Smith oscillating horizontal disc Generation of internal gravity waves

here the box at the top right-hand corner of the article or click Receive free email alerts when new articles cite this article-sign up in Internal gravity waves are generated in a stratified fluid by arbitrary forced oscillations of a horizontal disc. The wave fields are calculated in both the time domain and the frequency domain. In the time domain, an initial-value problem is solved using La...

An oscillating, homogeneous and isotropic Universe from Scalar-Tensor gravity

An oscillating, homogeneous and isotropic Universe which arises from Scalar-Tensor gravity is discussed in the linearized approach, showing that some observative evidences like the Hubble Law and the Cosmological Redshift are in agreement with the model. In this context Dark Energy appears like a pure curvature effect arising by the scalar field. PACS numbers: 04.80.Nn, 04.30.Nk, 04.50.+h

Oscillating cosmological solutions within gauge theories of gravity

New type of nonsingular oscillating solutions for the Universe described by cos-mological equations of gauge theories of gravity is presented. Advantages of these solutions with respect to existing nonsingular solutions within framework of general relativity and gauge gravity are discussed. It is shown in particular that these solutions have nonzero measure and stable on contraction stage unlik...

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