In this study, we examine two models of the scalar field, that is, a normal scalar field and a tachyon scalar field in F(R, T, X, phi) gravity to describe cosmic acceleration of the universe, where R, T and X are Ricci ...

In this study, we show the early inflation and the late-time acceleration of the universe in the model R + alpha R-n - beta R2-n + f(X, phi), which shows a minimum connection between geometry and scalar field. Both a ...

The phantom behavior of the Universe is discussed in an extended version of Gauss-Bonnet gravity. Following the method proposed by the author (Int. J. Mod. Phys. D, 27, 1850078. 2018. doi:10.1142/S0218271818500785), we ...

Ex situ and in situ bulk MgB2 superconducting materials have successfully been produced by the simple amorphous boron and nano-amorphous boron powders with the processes of ball milling, pressing, and annealing. The ...

Gamma-ray albedo factors of rare-earth oxides were determined experimentally. The detection of albedo factors for selected materials includes albedo number, albedo energy and albedo dose calculations. 59.54 keV gamma rays ...

There are various mechanisms that explain both the inflationary epoch of the early universe and a unification of this epoch with the other stages of the universe. In this study, we show all the expansion history of the ...

Viability of the super inflation scenario is discussed in F(T) modified teleparallel gravity. We calculate the power spectrum of the primordial curvature and tensor perturbations, and we derive two important parameters ...

Various approaches are developed that provide a unification of the early inflationary epoch of the universe and dark energy (cosmic accelerating expansion case). In one respect, we express this unification in a universal ...

The concept of albedo is used to describe the reflected incident radiation from a surface. Actually, this reflected radiation consists of two-component that enter the target samples and then backscattered from the target ...

In this work, we study on the inflationary era of the Universe in the context of f(R) gravity. For this purpose, we consider the f(R) gravity and its scalar perturbation equations. We start with an equation symmetry approach, ...