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.
Understanding APA Accreditation. About APA-CoA. The APA Commission on Accreditation (APA-CoA) is recognized by both the secretary of the U.S. Department of Education and the Council for Higher Education Accreditation, as the national accrediting authority for professional education and training in psychology.