Leaky feeder

A leaky feeder is a communications system used in underground mining and other tunnel environments. The layman's term "leaky feeder" implies that the cable is in some way deficient. Manufacturers and cabling professionals use the term "radiating cable" as this implies that the cable is designed to radiate: something that coaxial cable is not generally supposed to do.

Principle of operation

A leaky feeder communication system consists of a coaxial cable run along tunnels which emits and receives radio waves, functioning as an extended antenna. The cable is "leaky" in that it has gaps or slots in its outer conductor to allow the radio signal to leak into or out of the cable along its entire length. Because of this leakage of signal, line amplifiers are required to be inserted at regular intervals, typically every 350 to 500 metres, to boost the signal back up to acceptable levels. The signal is usually picked up by portable transceivers carried by personnel. Transmissions from the transceivers are picked up by the feeder and carried to other parts of the tunnel, allowing two-way radio communication throughout the tunnel system.

Feeder

Feeder are a British rock band based in Newport, Wales. Feeder has released eight studio albums, three compilations, two EPs, and 34 singles. They have spent a total of 180 weeks on the singles and albums charts combined as of 2012, and have accumulated 25 top 75 singles between 1997 and 2012.

Feeder's music has been inspired by a wide variety of artists and styles, including The Police, Nirvana, and The Smashing Pumpkins. Their early material showcased a heavy rock sound reminiscent of grunge, but the band would later introduce more acoustic aspects into their music, including elements of pianos and string orchestras.

The band was formed in 1992 under the name of "Reel" by vocalist and guitarist Grant Nicholas, drummer Jon Lee and bassist Simon Blight, three of the four members of Raindancer, after the departure of that band's other member, guitarist John Canham. However, Blight left Reel later in 1992, and the band played with many session bassists before hiring Taka Hirose in 1995, a year after the band signed with The Echo Label.

Feeder (disambiguation)

Feeder may refer to:

Technology

Feeder (beekeeping)

A feeder is a vessel or contraption used by beekeepers to feed pollen or honey (or substitutes) to honey bees from a honey bee colony.

Beekeepers feed bees when there is a shortage of those resources in nature, or when beekeepers want to mimic an abundance of those resources to encourage bees to behave in a certain manner. Modern beekeepers feed sugar syrup as a honey substitute in early spring to encourage comb building, during a dearth to provide energy to large colonies, in the autumn to help bees prepare for overwintering, or when creating nucleus hives. Pollen substitute is commonly fed to bees in early spring or when bees are located in a region with poor pollen resources.

Feeders may exist outside the hive, be designed to fit certain hive designs, be an integral part of a hive design, or be used separately inside the hive. Feeders may attach to the side of the hive, or slot into the flight entrance, or placed above or below the nest inside the hive or as a purpose-built hive component.