passive source
Look at other dictionaries:
Passive smoking — is the involuntary inhalation of smoke from tobacco products. It occurs when tobacco smoke permeates any environment, causing its inhalation by all people within that environment. Such smoke is called secondhand smoke (SHS) or environmental… … Wikipedia
Passive radar — systems (also referred to as passive coherent location and passive covert radar) encompass a class of radar systems that detect and track objects by processing reflections from non cooperative sources of illumination in the environment, such as… … Wikipedia
Passive immunity — is the transfer of active humoral immunity in the form of readymade antibodies, from one individual to another. Passive immunity can occur naturally, when maternal antibodies are transferred to the fetus through the placenta, and can also be… … Wikipedia
Passive seismic — listening of the natural low frequency earth movements, usually with the purpose to guess geological structure and/or to locate the underground source of oil, gas or other valuable resources. Usually the data listening is done in multiple… … Wikipedia
Source-sink dynamics — is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms. Since quality is likely to vary among patches of habitat, it is important to consider how a low… … Wikipedia
Passive speakers — has two unrelated meanings:* Passive speakers (language), non fluent speakers of a language* Passive speakers (audio), audio systems that do not have a built in power source … Wikipedia
passive — ► ADJECTIVE 1) accepting or allowing what happens or what others do, without active response or resistance. 2) Grammar (of verbs) in which the subject undergoes the action of the verb (e.g. they were killed as opposed to the active form he killed … English terms dictionary
Passive solar building design — Elements of passive solar design, shown in a direct gain application … Wikipedia
Passive house — The term passive house ( Passivhaus in German) refers to the rigorous, voluntary, Passivhaus standard for energy use in buildings. It results in ultra low energy buildings that require little energy for space heating or cooling. [… … Wikipedia
Passive infrared sensor — A Passive InfraRed sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR based motion detectors (see below). Apparent… … Wikipedia
