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 founded. G. Stanley Hall founds the American Psychological Association (APA) and serves as its first president. He later establishes two key journals in the field: American Journal of Psychology (1887) and Journal of Applied Psychology (1917).