In the last few decades, gravastars have been proposed as an alternative to black holes. The stability of gravastar has studied in many modified theories gravity along with Einstein's GR. $f(Q,T)$ gravity, a successfully theory for describing current accelerated expansion Universe, used this article study different aspects. According Mazur and Mottola (Proc. Natl. Acad. Sci 101, 9545 (2004)), i...

In this work, the backward Bayesian multiple linear regression (BBMLR) as a new approach is presented to predict the adsorption efficiency (AE) of Cd(II) ions by ostrich bone char (OBC) in the fixed bed adsorption with four operational variables consisting of pH (2-9), inlet Cd(II) concentration (Co= 25-100 mg/L), bed depth (h= 3-9 cm) and feed flow rate (Q= 0.5-30 mL/min). The performance of t...

We consider gravity mediated by non-metricity, with vanishing curvature and torsion. The gravitational action, including an arbitrary function of the non-metric scalar, is investigated in view characterizing dark energy effects. In particular, we present a method to reconstruct $f(Q)$ action without resorting \emph{a priori} assumptions on cosmological model. To this purpose, adopt based ration...

We study the dynamics of the nonlinear q-voter model with inflexible zealots in a finite well-mixed population. In this system, each individual supports one of two parties and is either a susceptible voter or an inflexible zealot. At each time step, a susceptible adopts the opinion of a neighbor if this belongs to a group of q≥2 neighbors all in the same state, whereas inflexible zealots never ...