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 defined. APA (American Psychological Association) is most commonly used to cite sources within the health sciences and social sciences fields. This resource, revised according to the 5th edition of the APA manual, offers examples for in-text citations, endnotes/footnotes, and your bibliography or reference page.