Static clingStatic cling is the tendency for light objects to stick (cling) to other objects owing to static electricity. It is common in clothing, but occurs with other items, such as the tendency of dust to be attracted to, and stick to, plastic items. In clothing, static cling occurs from static electricity. An electrostatic charge builds up on clothes due to the triboelectric effect when pieces of fabric rub against each other, as happens particularly in a clothes dryer. The separate positive and negatively charged surfaces attract each other.
Décharge électrostatiqueLa décharge électrostatique (DES) (en anglais, ESD pour electrostatic discharge) est un passage de courant électrique entre deux objets possédant des potentiels électriques différents sur un temps extrêmement court. Le terme est souvent utilisé en électronique et dans l'industrie lorsque l'on veut décrire des courants fugaces non-désirés pouvant endommager l'équipement électronique. Une décharge électrostatique est un problème grave dans l'électronique des solides, tels que les circuits intégrés.
Variety (cybernetics)In cybernetics, the term variety denotes the total number of distinguishable elements of a set, most often the set of states, inputs, or outputs of a finite-state machine or transformation, or the binary logarithm of the same quantity. Variety is used in cybernetics as an information theory that is easily related to deterministic finite automata, and less formally as a conceptual tool for thinking about organization, regulation, and stability. It is an early theory of complexity in automata, complex systems, and operations research.
