GC: n CT: Fumaroles, or steam vents, are the hottest hydrothermal features in the park of Yellowstone. They have so little water that it all flashes into steam before reaching the surface. At places like Roaring Mountain, the result is a lot of hissing of steam and gases. S: NPS

GC: n CT: Fuzzy logic is an approach to computing based on «degrees of truth» rather than the usual «true or false» (1 or 0) Boolean logic on which the modern computer is based. The idea of fuzzy logic was first advanced by Dr. Lotfi Zadeh of the University of

GC: n CT: Many concepts of problem solving theory are better understood in an abstract algebraic framework which also applies in automata theory. Because many systems of practical interest fall outside the scope of linear theory, it is desirable to enlarge as much as possible the class of systems for

GC: n CT: Nuclear fission is a nuclear reaction in which a heavy nucleus (such as uranium) splits into two lighter nuclei (and possible some other radioactive particles as well). In such radioactive heavy nuclei, the balance between the strong nuclear force attractive force and the electrostatic repulsive force can

GC: n CT: Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one while releasing massive amounts of energy. Fusion reactions take place in a state of matter called plasma — a hot, charged gas made of positive ions and free-moving electrons