Tether: Difference between revisions
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{{Other uses}} |
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A ''tether'' is a cord, fixture, or signal that anchors something movable to a reference point which may be fixed or moving. There are a number of applications for tethers: balloons, kites, [[High-altitude wind power|tethered wind-energy conversion systems]], [[anchor]]s, tethered water-flow energy conversion systems, towing, [[Leash|animal constraint]], and [[Power kite|power-kiting]]. Tethers may break by various means; if a tether is a signal, then interruption by signal barriers breaks the tether. If the tether is a cord or rope, then upon reaching the breaking strength of the tether, the tether fails in its function. [[Failure mode]]s for tethers are considered when designing arrangements where a tether is needed.<ref>{{cite book|last=Bekey|first=Ivan|title=Advanced Space System Concepts and Technologies, 2010-2030+|year=2003|publisher=Aerospace Press ; American Institute of Aeronautics and Astronautics|location=El Segundo, Calif. : Reston, Va.|isbn=978-1-884989-12-4|url=http://books.google.com/books?id=S4u1UgfxnHcC&pg=PA33&dq=tethers&hl=en&sa=X&ei=uLD3TsmoIKHr0gGL5uyuAg&ved=0CGgQ6AEwCA#v=onepage&q=tethers&f=false|page=33}}</ref> When a tether or line breaks suddenly, backlash of the segments may cause severe damage or loss of life; safety links are sometimes used to prevent excessive tension in a tether involved in towing objects or persons, like in the towing of [[sailplane]]s; the safety link in a tether is thus a tether itself. Tethering objects to prevent theft of an object like a computer at a school or library is now commonly seen.<ref>{{cite book|first=ed. by Seymour Bosworth|title=Computer Security Handbook|year=2002|publisher=Wiley|location=New York, NY|isbn=978-0-471-41258-8|url=http://books.google.com/books?id=JDXB8WTppk0C&lpg=RA2-PA19&dq=tethers%20theft-prevention&pg=RA2-PA20#v=onepage&q=tether&f=false|page=19}}</ref> |
A ''tether'' is a cord, fixture, or signal that anchors something movable to a reference point which may be fixed or moving. There are a number of applications for tethers: balloons, kites, [[High-altitude wind power|tethered wind-energy conversion systems]], [[anchor]]s, tethered water-flow energy conversion systems, towing, [[Leash|animal constraint]], and [[Power kite|power-kiting]]. Tethers may break by various means; if a tether is a signal, then interruption by signal barriers breaks the tether. If the tether is a cord or rope, then upon reaching the breaking strength of the tether, the tether fails in its function. [[Failure mode]]s for tethers are considered when designing arrangements where a tether is needed.<ref>{{cite book|last=Bekey|first=Ivan|title=Advanced Space System Concepts and Technologies, 2010-2030+|year=2003|publisher=Aerospace Press ; American Institute of Aeronautics and Astronautics|location=El Segundo, Calif. : Reston, Va.|isbn=978-1-884989-12-4|url=http://books.google.com/books?id=S4u1UgfxnHcC&pg=PA33&dq=tethers&hl=en&sa=X&ei=uLD3TsmoIKHr0gGL5uyuAg&ved=0CGgQ6AEwCA#v=onepage&q=tethers&f=false|page=33}}</ref> When a tether or line breaks suddenly, backlash of the segments may cause severe damage or loss of life; safety links are sometimes used to prevent excessive tension in a tether involved in towing objects or persons, like in the towing of [[sailplane]]s; the safety link in a tether is thus a tether itself. Tethering objects to prevent theft of an object like a computer at a school or library is now commonly seen.<ref>{{cite book|first=ed. by Seymour Bosworth|title=Computer Security Handbook|year=2002|publisher=Wiley|location=New York, NY|isbn=978-0-471-41258-8|url=http://books.google.com/books?id=JDXB8WTppk0C&lpg=RA2-PA19&dq=tethers%20theft-prevention&pg=RA2-PA20#v=onepage&q=tether&f=false|page=19}}</ref>=/ |
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==References== |
==References== |
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Revision as of 23:54, 23 December 2012
A tether is a cord, fixture, or signal that anchors something movable to a reference point which may be fixed or moving. There are a number of applications for tethers: balloons, kites, tethered wind-energy conversion systems, anchors, tethered water-flow energy conversion systems, towing, animal constraint, and power-kiting. Tethers may break by various means; if a tether is a signal, then interruption by signal barriers breaks the tether. If the tether is a cord or rope, then upon reaching the breaking strength of the tether, the tether fails in its function. Failure modes for tethers are considered when designing arrangements where a tether is needed.[1] When a tether or line breaks suddenly, backlash of the segments may cause severe damage or loss of life; safety links are sometimes used to prevent excessive tension in a tether involved in towing objects or persons, like in the towing of sailplanes; the safety link in a tether is thus a tether itself. Tethering objects to prevent theft of an object like a computer at a school or library is now commonly seen.[2]=/
References
- ^ Bekey, Ivan (2003). Advanced Space System Concepts and Technologies, 2010-2030+. El Segundo, Calif. : Reston, Va.: Aerospace Press ; American Institute of Aeronautics and Astronautics. p. 33. ISBN 978-1-884989-12-4.
- ^ Computer Security Handbook. New York, NY: Wiley. 2002. p. 19. ISBN 978-0-471-41258-8.
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