# summing+up

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**W. Somerset Maugham**— Maugham photographed by Carl Van Vechten in 1934 Born William Somerset Maugham 25 January 1874(1874 01 25) UK Embassy, Paris, France Died 16 Decemb …82

**Work breakdown structure**— A work breakdown structure or WBS is a tree structure, that permits summing of subordinate costs for tasks, materials, etc., into their successively higher level “parent” tasks, materials, etc. It is a fundamental tool commonly used in project… …83

**Nyquist–Shannon sampling theorem**— Fig.1: Hypothetical spectrum of a bandlimited signal as a function of frequency The Nyquist–Shannon sampling theorem, after Harry Nyquist and Claude Shannon, is a fundamental result in the field of information theory, in particular… …84

**Simplex**— For other uses, see Simplex (disambiguation). A regular 3 simplex or tetrahedron In geometry, a simplex (plural simplexes or simplices) is a generalization of the notion of a triangle or tetrahedron to arbitrary dimension. Specifically, an n… …85

**Quadrature**— Quadrature, derived from Latin quadrare , may refer to:In signal processing: *Quadrature amplitude modulation (QAM), a modulation method of using both a carrier wave and a quadrature carrier wave that is 90° out of phase with the main carrier… …86

**Lagos**— For other uses, see Lagos (disambiguation). Lagos Èkó Lagos Island as seen from the harbour near Victoria Island …87

**Time value of money**— The time value of money is the value of money figuring in a given amount of interest earned over a given amount of time. The time value of money is the central concept in finance theory. For example, $100 of today s money invested for one year… …88

**Negative feedback amplifier**— Figure 1: Ideal negative feedback model A negative feedback amplifier (or more commonly simply a feedback amplifier) is an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.… …89

**Skeptical Inquirer**— Infobox Magazine title = Skeptical Inquirer editor = Kendrick Frazier editor title = Editor in Chief frequency = Bi monthly category = circulation = 50,000 [Citation publication date = 2002 09 18 title = The bull fighter periodical = City… …90

**Stochastic matrix**— For a matrix whose elements are stochastic, see Random matrix In mathematics, a stochastic matrix (also termed probability matrix, transition matrix, substitution matrix, or Markov matrix) is a matrix used to describe the transitions of a Markov… …