Noyes station

Noyes is a station on the Chicago Transit Authority's 'L' system, on the Purple Line in Evanston, Illinois. It is located at 909 Noyes Street (directional coordinates 2255 north, 900 west), just a few blocks west of the north end of Northwestern University's Evanston campus. The Noyes Cultural Center is also nearby. This area of Evanston is a mix of residential and light commercial properties.

The automated voice for the station was used in the song "Chamber the Cartridge" by the melodic hardcore band, Rise Against.

History

Structure

The current station was constructed in the early 1930s and is at least the second station on the site; the first was built at grade level and was demolished when the line north of University Place was elevated. Like the rest of the 'L' north of Wilson, Noyes is elevated on a solid fill embankment, unlike the steel structure commonly associated with the 'L'. The station lacks a formal station house; two staircases on the north side of Noyes Street lead up to a small area containing a customer assistant's booth, a farecard vending machine, and two turnstiles. The island platform is composed of concrete and stretches south from the station entrance, covered by a canopy its entire length. Southbound trains stop on the west side of the platform, while northbound trains stop at the east part. After the station was elevated, Noyes was capable of berthing eight-car trains. Currently the platform can only accommodate six-car trains because the concrete on the northern end of the platform has been removed, although its framing and canopy are still in place.

Station

Station may refer to:

Agriculture and geography

Communications

Environment variable

Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer.

They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP environment variable to discover a suitable location to store temporary files, or the HOME or USERPROFILE variable to find the directory structure owned by the user running the process.

They were introduced in their modern form in 1979 with Version 7 Unix, so are included in all Unix operating system flavors and variants from that point onward including Linux and OS X. From PC DOS 2.0 in 1982, all succeeding Microsoft operating systems including Microsoft Windows, and OS/2 also have included them as a feature, although with somewhat different syntax, usage and standard variable names.

Details

In all Unix and Unix-like systems, each process has its own separate set of environment variables. By default, when a process is created, it inherits a duplicate environment of its parent process, except for explicit changes made by the parent when it creates the child. At the API level, these changes must be done between running fork and exec. Alternatively, from command shells such as bash, a user can change environment variables for a particular command invocation by indirectly invoking it via env or using the ENVIRONMENT_VARIABLE=VALUE <command> notation. All Unix operating system flavors, DOS, and Windows have environment variables; however, they do not all use the same variable names. A running program can access the values of environment variables for configuration purposes.

Television channel

A television channel is a physical or virtual channel over which a television station or television network is distributed. For example, in North America, "channel 2" refers to the broadcast or cable band of 54 to 60 MHz, with carrier frequencies of 55.25 MHz for NTSC analog video (VSB) and 59.75 MHz for analog audio (FM), or 55.31 MHz for digital ATSC (8VSB). Channels may be shared by many different television stations or cable-distributed channels depending on the location and service provider.

Depending on the multinational bandplan for a given region, analog television channels are typically 6, 7, or 8 MHz in bandwidth, and therefore television channel frequencies vary as well. Channel numbering is also different. Digital television channels are the same for legacy reasons, however through multiplexing, each physical radio frequency (RF) channel can carry several digital subchannels. On satellites, each transponder normally carries one channel, however small, independent channels can be used on each transponder, with some loss of bandwidth due to the need for guard bands between unrelated transmissions. ISDB, used in Japan and Brazil, has a similar segmented mode.