Dynamical Instability of Shear-free Collapsing Star in Extended Teleparallel Gravity

We study the spherically symmetric collapsing star in terms of dynamical instability. We take the framework of extended teleparallel gravity with non-diagonal tetrad, power-law form of model presenting torsion and matter distribution as non-dissipative anisotropic fluid. The vanishing shear scalar condition is adopted to search the insights of collapsing star. We apply first order linear perturbation scheme to metric, matter and $f(T)$ functions. The dynamical equations are formulated under this perturbation scheme to develop collapsing equation for finding dynamical instability limits in two regimes such as Newtonian and post-Newtonian. We obtain constraint free solution of perturbed time dependent part with the help of vanishing shear scalar. The adiabatic index exhibits the instability ranges through second dynamical equation which depend on physical quantities such as density, pressure components, perturbed parts of symmetry of star, etc. We also develop some constraints on positivity of these quantities and obtain instability ranges to satisfy the dynamical instability condition.Comment: 21 pages; Accepted in EPJC for publicatio

Thermodynamics of Various Entropies in Specific Modified Gravity with Particle Creation

We consider the particle creation scenario in the dynamical Chern-Simons modified gravity in the presence of perfect fluid equation of state $p=(\gamma-1)\rho$. By assuming various modified entropies (Bekenstein, logarithmic, power law correction and Reyni), we investigate the first law of thermodynamics and generalized second law of thermodynamics on the apparent horizon. In the presence of particle creation rate, we discuss the generalized second law of thermodynamics and thermal equilibrium condition. It is found that thermodynamic laws and equilibrium condition remain valid under certain conditions of parameters.Comment: 32 pages, 12 figures, AHEP accepted. arXiv admin note: text overlap with arXiv:1801.09999; text overlap with arXiv:1604.00899, arXiv:0811.4477 by other author

Warm Modified Chaplygin Gas Shaft Inflation

In this paper, we examine the possible realization of a new family of inflation called "shaft inflation" by assuming the modified Chaplygin gas model and tachyon scalar field. We also consider the special form of dissipative coefficient as $\Gamma={a_0}\frac{T^{3}}{\phi^{2 }}$ and calculate the various inflationary parameters in the scenario of strong and weak dissipative regimes. In order to examine the behavior of inflationary parameters, the planes of $n_s - \phi,~n_s - r$ and $n_s - \alpha_s$ (where $n_s,~\alpha_s,~r$ and $\phi$ represent spectral index, its running, tensor to scalar ratio and scalar field respectively) are being developed which lead to the constraints: $r< 0.11$, $n_s=0.96\pm0.025$ and $\alpha_s =-0.019\pm0.025$. It is quite interesting that these results of inflationary parameters are compatible with BICEP$2$, WMAP $(7+9)$ and recent Planck data.Comment: 20 pages, 6 figures, Accepted for publication in EPJ

Cultural Pragmatics in Edward Albee’s The Zoo Story

Cultural Pragmatics is essential for a close examination of Edward Albee’s The Zoo Story. It depicts how changing cultural values impinge on the behavioral patterns of the individual. This article attempts to investigate how intentions of interactants are culture driven and culture related. Collapse of cultural values and discontinuity of conventional view points and beliefs led people to a state of disorientation. The speaker’s discourse highlights the character’s inability to communicate to suggest the emptiness of hackneyed social intercourse resulting in psychopathological diseases among individuals

Analysis of the Short Story “The Tell-Tale Heart” by Edgar Allan Poe

“The Tell – Tale Heart” by Edgar Allan Poe is a short story written in the genre of horror. It describes the committing of murder and then confessing it due to being tormented by guilty conscious. The paper aims to analyze the story thoroughly including its themes and literary and rhetorical devices. The methodology used for the paper is discourse analysis which essentially reveals socio- psychological characteristics of the protagonist who is an unnamed person, telling a tale about a crime he committed to prove that he is not insane. The paper discusses in detail various aspects of the story which are directly or indirectly connected to the motives and psychological impulsions behind committing the crime by the protagonist. The paper concludes that the story has been written to provide a study of paranoia1 and mental deterioration