Macular hole surgery has been found to be associated with certain complications such as iatrogenic retinal breaks, retinal detachment visual field defects, glaucoma and cataract. However, cases of central retinal artery occlusion following macular hole surgery have rarely been described. We present a case of central retinal artery occlusion occurring immediately following macular hole surgery, ...

This paper aims at optimizing the parameters involved in stress analysis of perforated plates, in order to achieve the least amount of stress around the square-shaped holes located in a finite isotropic plate using metaheuristic optimization algorithms. Metaheuristics may be classified into three main classes: evolutionary, physics-based, and swarm intelligence algorithms. This research uses Ge...

Propagation properties of square, hexagonal and octagonal lattice photonic crystal fibers (PCFs) have been analyzed here for both stressed and unstressed conditions. The analysis has been carried out using finite element method. All types of PCFs are investigated here by varying number of air hole rings with same design and operating parameters. The results show that external stress causes PCFs...

In the final stages of collapse, quantum radiation due to particle creation from a naked singularity is expected to be significantly different from black hole radiation. In certain models of collapse it has been shown that, neglecting the back reaction of spacetime, the particle flux on future null infinity grows as the inverse square of the distance from the Cauchy horizon. This is to be contr...

This work describes new perturbative solutions to the classical, four-dimensional Kerr–Newman dilaton black hole field equations. Our solutions do not require the black hole to be slowly rotating. The unperturbed solution is taken to be the ordinary Kerr solution, and the perturbation parameter is effectively the square of the charge-to-mass ratio (Q/M) 2 of the Kerr–Newman black hole. We have ...

If the stellar population of the bulge contains black holes formed in the final core collapse of ordinary stars with M ∼> 30M⊙, then about 25,000 stellar mass black holes should have migrated by dynamical friction into the central parsec of the Milky Way, forming a black hole cluster around the central supermassive black hole. These black holes can be captured by the central black hole when the...

Starting from the most general action in Einstein-Dilaton-Nonlinear Electrodynamics (NED) theory, we obtain field equations. We apply equations for specific NED known as square root model coupled nonminimally to dilaton scalar whose self-interaction is Liouville type plus a cosmological constant and solve With pure magnetic it shown that strong limit of Born–Infeld theory. In static spherically...