1 Decoherence-free subspaces, subspace of a system's Hilbert space where the system is decoupled from the environment.  Dynamic Frequency Selection, part of the IEEE 802.11h wireless standard.
The American Psychological Association (APA) is a scientific and professional organization that represents psychologists in the United States.
APA is used to provide a consistent format across a discipline. APA stands for American Psychological Association The conventions of APA notation have been employed to provide unity in the knowledge base across the field. Related fields, like teaching, are increasingly adopting APA notation.