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The track on a railway or railroad, also known as the permanent way, is the structure consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll. For clarity it is often referred to as railway track (British English and UIC terminology) or railroad track (predominantly in the United States). Tracks where electric trains or electric trams run are equipped with an electrification system such as an overhead electrical power line or an additional electrified rail.

The term permanent way also refers to the track in addition to lineside structures such as fences etc.



Notwithstanding modern technical developments, the overwhelmingly dominant track form worldwide consists of flat-bottom steel rails supported on timber or pre-stressed concrete sleepers, which are themselves laid on crushed stone ballast.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Track_(rail_transport) The Fidelipac, commonly known as a "NAB cartridge" or simply "cart", is a magnetic tape sound recording format, used for radio broadcasting for playback of material over the air such as radio commercials, jingles, station identifications, and music. Fidelipac is the official name of this industry standard audio tape cartridge. It was developed in 1954 by inventor George Eash (although the invention of the Fidelipac cartridge has also been credited to Vern Nolte of the Automatic Tape Company), and commercially introduced in 1959 by Collins Radio at the 1959 NAB Convention. The cartridge was widely used at radio stations until the late 1990s, when such formats as MiniDisc and computerized broadcast automation made the Fidelipac cartridge obsolete.


The Fidelipac cartridge was the first audio tape cartridge available commercially, based on the endless-loop tape cartridge design developed by Bernard Cousino in 1952, while Eash shared space in Cousino's electronics shop in the early 1950s. Instead of manufacturing the Fidelipac format himself after developing it, Eash decided to license it for manufacture to Telepro Industries, in Cherry Hill, New Jersey. Telepro then manufactured and marketed the format under the Fidelipac brand name.


4-track or 4-track tape may refer to:

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/4-track International Ultramarine Corps

Traffic flow (computer networking)

Conceptual description Flow (Terence Blanchard album)

Flow is a 2005 jazz album by Grammy winning trumpeter Terence Blanchard, released through Blue Note, and was nominated for a Grammy Award "Best Jazz Instrumental Album" in 2005.


This disc, one of only a few projects that ten-time Grammy winner Herbie Hancock has produced for other artists, is imbued with a dark-hued melancholy that really comes to the fore on a pair of elegant, shape-shifting ballads -- "Benny's Tune," featuring Hancock on piano, and "Over There." Several pieces, Blanchard returning to his African roots thanks to a spirited "Wadagbe" and "Harvesting Dance." Lionel Loueke, a native of Benin, starred on his composition "Wadagbe," which he led off by tapping his guitar's hollow body like a percussion instrument. Then he added a West African chant as his melody, with his voice doubled via microphone effects. The title composition "Flow," split into three tracks spread across the album, opens with a low, hungry groove driven by the group's most recent additions (bassist Derrick Hodge and drummer Kendrick Scott) and offers variations on the theme for "Part II" and "Part III." This album Flow is an eclectic acoustic-electric hybrid, a nimble, uncompromising fusion of world music and mainstream jazz that suggests the shape of the genre to come. In Greek mythology, Leto (/ˈliːtoʊ/; Greek: Λητώ Lētṓ; Λατώ, Lātṓ in Dorian Greek, etymology and meaning disputed) is a daughter of the Titans Coeus and Phoebe, the sister of Asteria. and mother of Apollo and Artemis.

The island of Kos is claimed as her birthplace. In the Olympian scheme, Zeus is the father of her twins, Apollo and Artemis, the Letoides, which Leto conceived after her hidden beauty accidentally caught the eyes of Zeus. Classical Greek myths record little about Leto other than her pregnancy and her search for a place where she could give birth to Apollo and Artemis, since Hera in her jealousy had caused all lands to shun her. Finally, she finds an island that is not attached to the ocean floor so it is not considered land and she can give birth. This is her one active mythic role: once Apollo and Artemis are grown, Leto withdraws, to remain a dim and benevolent matronly figure upon Olympus, her part already played. In Roman mythology, Leto's equivalent is Latona, a Latinization of her name, influenced by Etruscan Letun.

This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Leto