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 Division Membership. APAâs 54 divisions are interest groups organized by members. APA members can apply to join one or more divisions, which have their own eligibility criteria and dues. Many members find that joining a division adds to their overall membership experience.enefit of APA Membership. Member Discounts Program â savings for members. Subscriptions to Monitor on Psychology and The American Psychologist. Access to online databases. Up to 60 percent off journal subscriptions. Up to 30 percent off videos. Discounts on most books.