Viable super inflation scenario from F(T) modified teleparallel gravity

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 corresponding to these perturbations, i.e., spectral index parameter n s and scalar-to-tensor ratio r. We observe that the super inflation scenario provides a nearly scale invariant power spectrum of scalar and tensor perturbations in the observational bounds of n(s) and r, according to choosing the proper values interval of the power-term of the scale factor, a similar to t(h)

Cosmic accelerated expansion of the Universe with phantom fluid

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 obtain a viable cosmological model for the phantom phase of the Universe. We find a condition for m in the model similar to G(m), which shows phantom expansion of the Universe. On the other hand, using a phantom source term similar to T-2n in the model we observe that the term similar to G(n), with n > 3/4, gives a phantomic space-time expansion. This form (G(n) + T-2n) obtained for the phantom phase of the Universe exhibits a similar form to Einstein's gravity theory (R + L-m). However, we addressed the cosmic coincidence problem for the model

Super inflation mechanism and dark energy from a cosmological entropy perspective

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 thermodynamic framework within the context of F (T, T-G) gravity, where T represents the torsion invariant and T-G is the teleparallel equivalent of the Gauss Bonnet term. For a Friedmann Robertson Walker universe model bounded by the dynamical apparent horizon, we explore the generalized second law of gravitational thermodynamics (GSLT). Finally, we discuss the super inflation mechanism, the deceleration case (radiation and dust regions), and the late time cosmic acceleration of the universe into the validity of the GSLT that we obtain

Super inflation mechanism and dark energy in F(T, T-G) gravity

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 universe and transition among of them in a single form by using the theoretical framework of F(T,TG) gravity in the context of the FRW (Friedmann-Robertson-Walker) universe. According to a particular model we obtain the unified solutions of the field equations. Without using any scalar field description we especially present the super inflation mechanism composed of three phase regions which describes the evolution of the early universe. The mechanism begins with a vacuum state and then follows a super accelerated period where there are two regions. The first continues in a quintessential field, and the second is a region where the radiation is created. Furthermore, we verified this inflationary mechanism by using the spectral index parameter and the scalar tensor ratio, i.e., ns, r, and calculated the ratio of radiation emergent from the quintessence field. This creation should be in a certain rate in the early universe otherwise we show that the universe cannot survive and continue to expand. Also, we have obtained a phantom solution of the model that shows two regions which are compatible with the recent cosmological observations. In one respect, it is observed that the late time expansion of the universe is similar to the early time inflation

Successful treatment of refractory gastrointestinal bleeding by systemic (oral) ankaferd blood stopper in a patient with Glanzmann thrombasthenia

Background: Glanzmann Thrombasthenia (GT) is a genetic platelet dysfunction and a life threatening disease. Ankaferd Blood Stopper (ABS) is a topical hemostatic agent of herbal origin which has been recently made available for clinical use. Its hemostatic effect is independent from blood clotting factors and occurs as a result of the aggregation of focal red blood cells by an encapsulated protein web. Case Report: In this paper, a patient with GT is presented in whom 3 months of gastrointestinal bleeding refractory to all medical therapies was controlled within a short time of using oral ABS. Conclusion: The difference between this patient and other cases presented in the medical literature is the oral use of ABS. Thus, this patient may contribute to the medical community in showing the safety and efficacy of systemic (oral) ABS in patients with disorders of coagulation. However, there is a need for more patient experiences. © Trakya University Faculty of Medicine

Cosmographic nature of the early universe from extra dimensional perspective

In this study, making use of the f(R) theory of gravity in a D-dimensional Kaluza-Klein type framework, we discuss whether we need to assume additional dimensions in order to explain two stages (inflation and deceleration phases) of the universe. To reach this goal, we start with a higher dimensional form of the Friedmann equation written in the f(R) gravity. For the inflation era occurring after a beginning vacuum phase of the universe, we conclude that a 10-dimensional spacetime model is needed as predicted in the string theory. However, after using a fixed field condition, it is observed that additional dimensions are compactified on the standard four spacetime dimensions in the deceleration phase. Moreover, the additional dimensions may be responsible for the dynamics of the dark energy dominated era, that's why we can state that the source of dark energy may be the extra dimensions. (c) 2019 The Authors. Published by Elsevier B.V

The power of informal communication and perceived organizational support on energy at work and extra-role behavior: A survey on teachers

This research studies the effect of energy at work, internal-external informal communication and perceived organisational support on extra role behaviour. The population of survey included teachers (479 teachers at 25 elementary and middle schools) at The Ministry of National Education located in the Burdur in Turkey. Research method is a survey with a questionnaire and participants has been reached with the convenience sampling method. Two model (purposed and revised) was examined by structural equation model approach. According to the findings, internal informal communication increases energy at work, and therefore, energy at work has a considerably positive effect on extra role behaviour. Besides that, perceived organisational support has seriously positive effect on internal informal communication. As inferred from these findings, the increase of perceived organisational support will also increase internal informal communication, and the increase of communication will enable lecturers to be more energetic, and hence, such energy will trigger lecturers to make extra efforts for their organizations