**Specific impulse** — (usually abbreviated I sp) is a way to describe the efficiency of rocket and jet engines. It represents the impulse (change in momentum) per unit of propellant. The higher the specific impulse, the less propellant is needed to gain a given amount … Wikipedia

**Power virus** — A power virus is a malicious computer program that executes specific machine code in order to reach the maximum CPU power dissipation (thermal energy output for the central processing unit). Computer cooling apparatus are designed to dissipate… … Wikipedia

**Power semiconductor device** — Power semiconductor devices are semiconductor devices used as switches or rectifiers in power electronic circuits (switch mode power supplies for example). They are also called power devices or when used in integrated circuits, called power… … Wikipedia

**Power line communication** — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… … Wikipedia

**Maximum parsimony** — Maximum parsimony, often simply referred to as parsimony, is a non parametric statistical method commonly used in computational phylogenetics for estimating phylogenies. Under maximum parsimony, the preferred phylogenetic tree is the tree that… … Wikipedia

**Specific absorption rate** — (SAR) is a measure of the rate at which radio frequency (RF) energy is absorbed by the body when exposed to radio frequency electromagnetic field. It is defined as the power absorbed per mass of tissue and has units of Watts per kilogram [cite… … Wikipedia

**Specific fuel consumption (thrust)** — Specific fuel consumption, often shortened to SFC, or TSFC is an engineering term that is used to describe the fuel efficiency of an engine design with respect to thrust output. It allows the efficiency of different sized engines to be directly… … Wikipedia

**Power MOSFET** — A Power MOSFET is a specific type of Metal Oxide Semiconductor Field Effect Transistor (MOSFET) designed to handle large power. Compared to the other power semiconductor devices (IGBT, Thyristor...), its main advantages are high commutation speed … Wikipedia

**Power law** — A power law is any polynomial relationship that exhibits the property of scale invariance. The most common power laws relate two variables and have the form:f(x) = ax^k! +o(x^k),where a and k are constants, and o(x^k) is of x. Here, k is… … Wikipedia

**Maximum spacing estimation** — The maximum spacing method tries to find a distribution function such that the spacings, D(i), are all approximately of the same length. This is done by maximizing their geometric mean. In statistics, maximum spacing estimation (MSE or MSP), or… … Wikipedia