Fluorosis is a condition due to ingestion of excessive amounts of fluor which can cause the change in tooth structure and strength.However, there is still lack of explanation on the surface structure of crystal hydroxyapatite that influences the microscopic characteristic of fluorosis enamel.Objectives: To investigate the surface structure of cryst
Abstract Diffractive optical elements (DOEs) have a wide range of applications in optics and photonics, thanks to their capability to perform complex wavefront shaping in a compact form.However, widespread applicability of DOEs is still limited, because existing fabrication methods are cumbersome and expensive.Here, we present a simple and cost-eff
A linear-scaling algorithm based on a divide-and-conquer (DC) scheme is designed to perform large-scale molecular-dynamics simulations, in which interatomic forces are computed quantum mechanically in the framework of the density functional theory (DFT).This scheme is applied to the thermite reaction at an Al/Fe2O3 interface.It is found that mass F
Technology alters both perceptions of human intelligence and creativity and the actual processes of intelligence and creativity.Skills that were once important for human intelligence, for example, computational ones, no longer hold anywhere near the same importance they Dab Inserts did before the age of computers.The advantage of computers is that