A bstract We study the evolution of Gregory-Laflamme instability for black strings in global AdS spacetime, and investigate CFT dual formation a bulk naked singularity. Using an effective theory large D limit, we uncover rich variety dynamical behaviour, depending on thickness string initial perturbations. These include: inflows horizon generators from asymptotic boundary (a ‘black tsunami’); p...

We study a model of interfacial crack in which contact of the crack faces obeys a Coulomb law of friction. For such cracks, the possibility that the stress has a stronger singularity than rÿ1=2 near the tip has been reported. In this paper, we demonstrate that these strong singularities can, in fact, be discarded, because they would assume a backward propagation of the crack. In passing, we pro...

aim and background: the aim of current study was to investigate the factor structure, reliability, and validity of parenting stress index-short form (psi-sf) among tehran city's mothers with 7-12 year-old children. methods and materials: after translation, back translation and adaptation of instrument, due to normalization this instrument by applied survey design, 468 mothers from those which s...

T h e stress singularity of a sha rp wedge contacting a half p lane can b e avoided by changing t h e wedge shape. Shape optimization is accomplished wi th the geometric s t ra in method (GSM), an optimali ty criterion method. Several numerical examples a r e provided for different materials i n t h e wedge and half plane t o avoid stress singularity near t h e sha rp corner of t h e wedge. Opt...