Filter

Biography Wikipedia

Group Members: Alan Bailey

Wikipedia:

Filter may refer to:

Chemistry, engineering and materials

In chemistry, engineering, or household usage, a device to separate mixtures. See:

Filter (aquarium), critical components of both freshwater and marine aquariaFilter (chemistry), a device (usually a membrane or layer) that is designed to physically block certain objects or substances while letting others throughFilter paper, a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or airAir filter, a device composed of fibrous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the airOil filter, a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oilPneumatic filter, a device which removes contaminants from a compressed air streamWater filter, removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to various extents for irrigation, drinking water, aquariums, and swimming pools

Optics and photography

In optics and photography, a device to remove, or to enhance, certain ranges of wavelengths (colors) of light. See:

Filter (optics), including types: Interference filterDichroic filterPhotographic filter, a camera accessory consisting of an optical filter that can be inserted in the optical pathInfrared cut-off filter, designed to reflect or block mid-infrared wavelengths while passing visible lightH-alpha filter, a specific red visible spectral line created by hydrogen with a wavelength of 6562.8 ÅChelsea filterAstronomical filter, a telescope accessory used to enhance the details of celestial objects.

Turbulence modeling

In turbulence modeling, a procedure to dampen or remove the highest frequencies of the flow:

Filter (large eddy simulation), in the context of large eddy simulation (LES) is a mathematical operation intended to remove a range of small scales from the solution to the Navier-Stokes equations

Signal processing

In signal processing, especially electronics, an algorithm or device for removing part(s) of a signal:

Filter (signal processing), especially, Electronic filter, an electronic circuit which processes signals, for example to remove unwanted frequency componentsDigital filter, a system that performs mathematical operations to reduce or enhance certain aspects of a signalAnalogue filter, a basic building block of signal processing much used in electronics, see Passive analogue filter development

Computing

In computing:

Filter (higher-order function), a higher-order function that processes a data structure (typically a list) in some order to produce a new data structure containing exactly those elements of the original data structure for which a given predicate returns the boolean value trueA program to process a data stream: Filter (software), a computer program to process a data streamFilter (Unix), a program that gets most of its data from its standard input (the main input stream) and writes its main results to its standard output (the main output stream)Filter (video)Email filterInternet filterWordfilter, a script typically used on Internet forums or chat rooms that automatically scans users' posts or comments as they are submitted and automatically changes or censors particular words or phrasesBPF filter expression used in the qualification of network dataDSL filter, a low-pass filter installed between analog devices and a telephone line

Philosophy

Category-based filtering of perception — according to (objectivist interpretations of), Kant

Other

In mathematics, a certain kind of subset of a partially ordered set. See Filter (mathematics), a special subset of a partially ordered setFiltering problem (stochastic processes), a mathematical model for a number of filtering problems in signal processing and the likeIn psychology, a type of learning blockage. See Affective filter, an impediment to learning or acquisition caused by negative emotional ("affective") responses to one's environment. It is a hypothesis of second language acquisition theory, and a field of interest in educational psychologyIn transportation. See Filtering forward, a practice that cyclists use to pass slow or stopped congested traffic

Proper name

Filter (band), an American rock bandFilter (TV series), a show on the G4 channelFilter (magazine), an off-beat indie music magazineHelicon Filter, a raster graphics editorFilter (theatre company)