Media

Media may refer to:

Communications

Media (communication)

Media (the singular form of which is medium) is the collective communication outlets or tools that are used to store and deliver information or data. It is either associated with communication media, or the specialized communication businesses such as: print media and the press, photography, advertising, cinema, broadcasting (radio and television) and publishing.

Evolution

The word media is defined as "one of the means or channels of general communication, information, or entertainment in society, as newspapers, radio or television."

The beginning of human communication through designed channels, i.e. not vocalization or gestures, dates back to ancient cave paintings, drawn maps, and writing.

The Persian Empire (centred on present-day Iran) played an important role in the field of communication. It has the first real mail or postal system, which is said to have been developed by the Persian emperor Cyrus the Great (c. 550 BC) after his conquest of Media. The role of the system as an intelligence gathering apparatus is well documented, and the service was (later) called angariae, a term that in time turned to indicate a tax system. The Old Testament (Esther, VIII) makes mention of this system: Ahasuerus, king of Medes, used couriers for communicating his decisions.

Medjå

Medjå or Grong is a village which serves as the administrative center of the municipality of Grong in Nord-Trøndelag county, Norway. It is located along the river Namsen, at the confluence with the river Sanddøla. The Nordlandsbanen railway line runs along the eastern part of the village, stopping at Grong Station. The European route E6 highway runs through the western edge of the village. Grong Church, the main church for the area, is also located in this village. The 1.48-square-kilometre (370-acre) village has a population (2011) of 1,059. The population density is 716 inhabitants per square kilometre (1,850/sq mi).

References

Channel (programming)

In computing, a channel is a model for interprocess communication and synchronization via message passing. A message may be sent over a channel, and another process or thread is able to receive messages sent over a channel it has a reference to, as a stream. Different implementations of channels may be buffered or not, and either synchronous or asynchronous.

Channels are fundamental to the process calculus approach to concurrency, and originated in communicating sequential processes (CSP), a formal model for concurrency, and has been used in many derived languages, such as occam, and Limbo programming language (via Newsqueak and the Alef programming language). They are also used in the C programming language threading library libthread, and in Plan 9 from Bell Labs, which uses libthread, as well as in Stackless Python and the Go programming language.

Channel implementations

Channels modeled after the CSP model are inherently synchronous: a process waiting to receive an object from a channel will block until the object is sent. This is also called rendezvous behaviour. Typical supported operations are presented below using the example of the libthread channel API.

Price channels

A price channel is a pair of parallel trend lines that form a chart pattern for a stock or commodity. Channels may be horizontal, ascending or descending. When prices pass through and stay through a trendline representing support or resistance, the trend is said to be broken and there is a "breakout".

References

See also

Channel (digital image)

Color digital images are made of pixels, and pixels are made of combinations of primary colors represented by a series of code. A channel in this context is the grayscale image of the same size as a color image, made of just one of these primary colors. For instance, an image from a standard digital camera will have a red, green and blue channel. A grayscale image has just one channel.

Overview

In the digital realm, there can be any number of conventional primary colors making up an image; a channel in this case is extended to be the grayscale image based on any such conventional primary color. By extension, a channel is any grayscale image the same size with the "proper" image, and associated with it.

"Channel" is a conventional term used to refer to a certain component of an image. In reality, any image format can use any algorithm internally to store images. For instance, GIF images actually refer to the color in each pixel by an index number, which refers to a table where three color components are stored. However, regardless of how a specific format stores the images, discrete color channels can always be determined, as long as a final color image can be rendered.