The classical plastic injection method Toothbrush is based on the principle of injecting a single color of a single polymeric material into the mold cavity under high pressure.In cases where the products are expected to have contrasted functional features and different colors, the classic injection process and the conventional injection molds are n
We present a hydrodynamic model for a thin spherical shell of active nematic liquid Cakes crystal with an arbitrary configuration of defects.The active flows generated by defects in the director lead to the formation of stable vortices, analogous to those seen in confined systems in flat geometries, which generate effective dynamics for four +1/2 d
To understand the anisotropy dependence of the damage evolution and material removal during the machining process of MgF _2 single crystals, nanoscratch tests of MgF _2 single crystals with different crystal planes and directions were systematically performed, and surface morphologies of the scratched grooves under different conditions were analyze