Critical gravitational collapse was first found by Choptuik[1] in simulations of a spherically symmetric massless scalar field. A natural question to pose is then how critical collapse behaves when the scalar field has a mass, since this will introduce a characteristic length that destroys the scale invariance of the field equations. This question was studied by Brady et. al.[2] The results of ...

in this study, nonlocal nonlinear instability and the vibration of a double carbon nanotube (cnt) system have been investigated. the visco-pasternak model is used to simulate the elastic medium between nanotubes, on which the effect of the spring, shear and damping of the elastic medium is considered. both of the cnts convey a viscose fluid and a uniform longitudinal magnetic field is applied t...

in the field of critical literature, siavash kasraie and ahmad matar's poems can be comparatively analyzed in terms of their social background, poetic content and linguistic strategies. applying a.van dijk’s socio–cognitive model of discourses studies, this paper uses critical discourse analysis to identify discourses formed in the works of the poets and analyzes the ideologies and discourse-or...