Current (stream)

A current, in a river or stream, is the flow of water influenced by gravity as the water moves downhill to reduce its potential energy. The current varies spatially as well as temporally within the stream, dependent upon the flow volume of water, stream gradient, and channel geometrics. In tidal zones, the current in rivers and streams may reverse on the flood tide before resuming on the ebb tide.

See also

Current

Current may refer to:

Ongoing events

Science and mathematics

Arts and entertainment

Other uses

See also

Current (album)

Current is the fifth album by funk-disco band Heatwave, released in 1982 on the Epic label. It was produced by Barry Blue.

Track listing

All songs written and composed by Rod Temperton, except where noted. 

Personnel

Charts

Singles

References

External links

Current (mathematics)

In mathematics, more particularly in functional analysis, differential topology, and geometric measure theory, a k-current in the sense of Georges de Rham is a functional on the space of compactly supported differential k-forms, on a smooth manifold M. Formally currents behave like Schwartz distributions on a space of differential forms. In a geometric setting, they can represent integration over a submanifold, generalizing the Dirac delta function, or more generally even directional derivatives of delta functions (multipoles) spread out along subsets of M.

Definition

Let denote the space of smooth m-forms with compact support on a smooth manifold . A current is a linear functional on which is continuous in the sense of distributions. Thus a linear functional

is an m-current if it is continuous in the following sense: If a sequence of smooth forms, all supported in the same compact set, is such that all derivatives of all their coefficients tend uniformly to 0 when tends to infinity, then tends to 0.

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its location or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, crick, gill (occasionally ghyll), kill, lick, mill race, rill, river, syke, bayou, rivulet, streamage, wash, run, or runnel.

Streams are important as conduits in the water cycle, instruments in groundwater recharge, and corridors for fish and wildlife migration. The biological habitat in the immediate vicinity of a stream is called a riparian zone. Given the status of the ongoing Holocene extinction, streams play an important corridor role in connecting fragmented habitats and thus in conserving biodiversity. The study of streams and waterways in general is known as surface hydrology and is a core element of environmental geography.

Types

Stream (computing)

In computer science, a stream is a sequence of data elements made available over time. A stream can be thought of as items on a conveyor belt being processed one at a time rather than in large batches

Streams are processed differently from batch data – normal functions cannot operate on streams as a whole, as they have potentially unlimited data, and formally, streams are codata (potentially unlimited), not data (which is finite). Functions that operate on a stream, producing another stream, are known as filters, and can be connected in pipelines, analogously to function composition. Filters may operate on one item of a stream at a time, or may base an item of output on multiple items of input, such as a moving average.

Examples

The term "stream" is used in a number of similar ways:

Stream (album)

Stream is the eighth album by Fischer-Z. The album contains the single "Protection", which explored the dark area of child exploitation. Following the album, John Watts concentrated on his solo career again, making this the last album by Fischer-Z, before its slight revival again in 2002.

Track listing

All songs written by John Watts except were noted.

Personnel

Additional musicians

Additional personnel