But Dr. Pernet noticed that these larvae, about one-hundredth of an inch long, were building thin flattened spheres around them.
Numerous self-assembly methods and self-assembled superstructures including fibers, thin films, spheres, crumpled particles, aerogel/hydrogels, honeycomb, and nacre-like structures have been discussed.
In his popular book, "The Porpoise Watcher" [19], Norris laid out an answer to this question and the mechanism as we now understand it: "The physicist showed that sounds hitting a thin-walled sphere produced a 'flexural wave' in the wall of the sphere.
In this procedure, an assembly of the flexible thin-wall spheres is modelled as a stack of rigid spheres connected by a set of linear springs.
In this paper, we investigate the vortex nucleation on a thin superconducting hollow sphere.
We examine the mechanical response of an incompressible thin-wall composite sphere (TWCS) within the framework of finite deformation elasticity.
In this study it is shown that the negative Poisson's ratio in this material is due to the high ratio between tangential to normal stiffnesses of a thin-wall hollow sphere.
To our best knowledge, no such peak-tunable property has been reported before, although spectral shift due to the thickness of mesoporous silica spheres' thin film has been observed in previous works [4, 5, 9, 10].
This situation is relevant for larger particles (> 30 mm equivalent sphere) and thin wood chips, due to sharp edges aiding quick ignition.
The first is a thin layer near the sphere, where we have used a spherical coordinate system.
