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: In this paper, we focus on primary school students and show that it is possible for students without prior knowledge in these areas to re-invent and successfully implement cryptogra-phy and ...

Abstract: The auxiliary power unit (APU) of aircraft is an important part of the aviation power system. The assembly process is a key link in the production and manufacturing of APU, especially the ...