As a community, we (programmers, compiler writers, hardware architects, etc.) often take folklore, e.g. claims in programming guides, for granted. Inspired by Descartes’ methodic doubt, i.e. challenging the truth of one’s beliefs, we question this folklore. Thus, we have developed a tool suite to systematically test the memory ordering behaviour of multiand manycore chips and compared our obser...

Some critics of invasion biology have argued the ecosystems by nonindigenous species can create more valuable ecosystems. They consider invaded communities as because they potentially produce ecosystem services. To establish that introduction creates ecosystems, defend value is provisioned These services are derived from productivity, production and cycling resources. Ecosystem productivity a r...

Two plane geometric graphs are said to be compatible when their union is a plane geometric graph. Let S be a set of n points in the Euclidean plane in general position and let T be any given plane geometric tree whose vertex set is S. The main problem we consider in this work consists of finding a second plane geometric tree T ′ on S, such that T ′ is compatible with T and shares with T a minim...