The eggs of Dactylobiotus dispar, similar to other Tardigrada eggs, are covered with two shells: the vitelline envelope and the chorion. Ultrastructural studies have shown that the oocyte actively participates in the formation of both shells. The process of egg capsule formation begins at the midpoint of vitellogenesis. The chorion at first appears as isolated cones resulting from the exocytoti...

The prediction of the critical buckling conditions shell structures is plagued by imperfection sensitivity. Non-destructive testing through point-load probing has been recently proposed to map stability landscape cylindrical shells. However, counterpart procedure for spherical shells still debatable. Here, we focus on mechanical response pressurized containing a single dimple–like defect point ...

Modal signals of transverse sensing of truncated conical shells with simply supported boundary condition at both ends are investigated. The embedded piezoelectric layer on the surface of conical shell is used as sensors and output voltages of them in considered modes are calculated. The Governing sensing signal displacement equations are derived based on the Kirchhoff theory, thin-shell assumpt...