Elastic cylindrical shells are fitted with an internal mechanism which is optimized so that, in the quasi-static regime, the combined system exhibits prescribed effective acoustic properties. The mechanism consists of a central mass supported by an axisymmetric distribution of elastic stiffeners. By appropriate selection of the mass and stiffness of the internal mechanism, the shell's effective...

This paper develops a new solution of gravitational vacuum star in the background charged Kiselev black holes as an exterior manifold. We explore physical features and stability thin-shell gravastars with radial perturbation. The matter thin layer located at greatly affects stable configuration developed structure. assume three different choices distribution such barotropic, generalized Chaplyg...

This paper entails the study of the pulsed-jet propulsion inspired by cephalopods in the frame of underwater bioinspired robotics. This propulsion routine involves a sequence of consecutive cycles of inflation and collapse of an elastic bladder, which, in the robotics artefact developed by the authors, is enabled by a cable-driven actuation of a deformable shell composed of rubber-like material...

A Proposal for SNO is made for simultaneous detection of Neutral Current, Charged Current and Elastic Scattering of Solar-neutrino induced events. The detector would be a thin (order 0.001"), flexible, transparent bladder, of radius 5m to be placed within the main 6m radius acrylic sphere. It would be filled with heavy-water containing the usual 2.5T dissolved NaCI to act as the neutron-to-elec...

The environments of supernova explosion are often inhomogeneous and there may be jumps in their density structure. We have developed a semi-analytic model under the thin-shell approximation for supernova remnants that evolve crossing a density jump in the ambient medium. The generic evolutionary relations are presented for the blast wave after impacting on a cavity wall, which may be produced b...

Mannobiose-modified polyethylenimines (PEI) are used in gene therapy to generate nanoparticles of DNA that can be targeted to the antigen-presenting cells of the immune system. We report that the sugar modification alters the DNA organization within the nanoparticles from homogenous to shell-like packing. The depth-dependent packing of DNA within the nanoparticles was probed using AFM nano-inde...