Psilocybe mushrooms cause hallucinations because they contain the psychotropic tryptamines psilocybin and psilocin (some species also contain other, weaker psychotropic compounds like baeocystin or norbaeocystin). A single mushroom contains anywhere from 0.2 to 0.4 percent psilocybin.
Windows Driver Frameworks. Windows Driver Frameworks (WDF, formerly Windows Driver Foundation), is a set of Microsoft tools and libraries that aid in the creation of device drivers for Windows 2000 and later versions of Windows. It complements Windows Driver Model, abstracting away much of the boilerplate complexity in writing Windows drivers.
WDF * IDF: Brief explanation. WDF * IDF is a formula by which search engines determine the optimal distribution of topics, relevant terms, and keywords in content. The method for determining this distribution, however, is much more complex than working with keyword density alone.