A recent article reports that an Oracle patent on a fast sorting method has expired, allowing open source databases to use it freely. Mark Callaghan, the inventor behind the sorting algorithm, shows ...

Abstract: The tree (hierarchical) structure is one of the elementary memory arrangements, used by numerous data structures – ranging from simple to relatively sophisticated ones. The most well-known ...

Abstract: Resilient wheel is a multilayer composite structure with discontinuous impedance, the internal structure is prone to damage due to repeated interaction. It is a difficult point for damage ...