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Cycle or Cycles may be:

Contents 1 Sports 2 Arts 3 History 4 Culture 5 Science 5.1 Astronomy 5.2 Biology 5.3 Chemistry 5.4 Physics 5.5 Geology 5.6 Meteorology 5.7 Engineering 5.8 Mathematics 5.9 Computer science 5.10 Military science 5.11 Political science 6 Business 6.1 Finance 6.2 Economics 6.3 Telecommunication 7 Crime 8 Television 9 Related concepts

• Cycle, motorcycle
• Cycle, bicycle
• Cycle, physics - The event of an elapsed period of oscillation
• Cycle (music)
• Cycle, group of works termed a literature cycle
• Cycle (graph theory), aspect of higher mathematics
• Cycles (Sinatra), 1968 musical-recording album by Frank Sinatra
• Cycles (Doobies), 1989 musical-recording album by The Doobie Brothers
• Cycle, mathematical topology concept of Homology theory
• Cycle, computer instruction cycle
• -cycle, suffix

[edit] Sports

• Cycling, the sport of riding a bicycle
• Hitting for the cycle in baseball
• Paris-Roubaix Cycle Race.

[edit] Arts

• Cycle (music): Interval cycle, cyclic form and song cycle in music. Also in music, the cycle of fifths.
• Literature cycle, e.g. The Ring Cycle (more examples there).
• Sonnet cycle (examples there).
• The Cremaster Cycle, a sequence of five films by Matthew Barney.
• The Baroque Cycle, a series of books written by Neal Stephenson.
• The Pendragon Cycle, a series of books written by Stephen R. Lawhead.
• Northern Homily Cycle, a poem from the 14th century

[edit] History

• Indiction cycle was a cycle of 15 years used to date medieval documents
• Operation Cycle during World War II.
• Dynastic cycle in Chinese political theory.
• Sexagesimal cycle in Chinese philosophy and calendar
• Cyclical patterns in history.

[edit] Culture

• Cycles, a 1968 album by Frank Sinatra.
• Cycles, a 1989 album by The Doobie Brothers.
• A cycle path and (in Britain), the Sea to Sea Cycle Route and the National Cycle Network
• monomythic cycle of the hero.

[edit] Science

[edit] Astronomy

• Eclipse cycle and the Saros cycle.
• Solar cycle related to sunspots.
• solar cycle (calendar) related to days of the week in calendars.
• Full moon cycle.
• Metonic cycle in calendars.
• Sothic cycle in the ancient Egyptian calendar.
• Great year related to the precession of the equinoxes.

[edit] Biology

• Biological life cycle
• Carbon cycle
• Cell cycle
• Citric acid cycle
• Earthworm organic cycle
• Eel life cycle
• Honeybee life cycle
• Human sexual response cycle
• Lytic cycle related to viruses
• Menstrual cycle
• Nitrogen cycle
• Nutrient cycle
• Phosphorus cycle
• Reproductive cycle
• Sleep cycle
• Urea cycle

[edit] Chemistry

• A series of chemical reactions. See e.g. Citric acid cycle, Kreb's cycle, the Born Haber cycle or the Calvin cycle.
• Biogeochemical cycles such as the Ozone-oxygen cycle (see list there).
• A cyclic compound. See also alicyclic compound

[edit] Physics

• The cycle is a unit of phase angle equivalent to one oscillation, or 2π radians. It appears in the once-common frequency unit cycle per second, which has now almost completely been supplanted by the Hertz.
• Consequently, in quantum optics, a Rabi cycle is that oscillation whose rate is the Rabi frequency.
• In astrophysics, the CNO cycle is a sequence of nuclear reactions whose net effect is fusion. It is the predominant fuel reaction in stars larger than the sun.

[edit] Geology

• Water cycle
• Rock cycle

[edit] Meteorology

• Milankovitch cycles in paleo-climatology
• Rapid Update Cycle for weather forecast

[edit] Engineering

• Thermodynamic Heat engine cycle
  • Otto cycle, the Diesel cycle, the two-stroke cycle, the Miller cycle and the Atkinson cycle in cars;
  • Carnot cycle, Rankine cycle, Stirling cycle and Ericsson Cycle in heat engines;
  • Brayton cycle in a gas turbine;
  • combined cycle in power plants;
  • Refrigeration cycle
• Rocket liquid air cycle engine
  • expander cycle
  • Gas-generator cycle
  • Rocket Staged combustion cycle
  • Rocket Pressure-fed cycle

• The Nuclear fuel cycle

• Bicycle, tricycle and unicycle. See also Freight bicycle.
• Motorcycle.

[edit] Mathematics

• Cyclic permutation.
• Cyclic group.
• Cycle (graph theory) and a Hamiltonian cycle in graph theory. See also cycle space and Floyd's cycle-finding algorithm.
• A cycle is an element of a homology class. See also Hodge cycle.
• The Limit-cycle in dynamical systems, e.g. the Lotka-Volterra cycle.
• A cycle matroid.
• A cyclic order

[edit] Computer science

• Instruction cycle in a CPU
• "Computer cycles" are also a measure of the necessary time needed to be spent by a CPU to perform a certain task. Example: "I bet that banks use a lot of cycles to process their daily account transactions". See Instructions per second, FLOPS.

[edit] Military science

• Boyd cycle in military strategy.

[edit] Political science

• Top cycle, a notion in voting systems.

[edit] Business

[edit] Finance

• A cash conversion cycle.
• The related notions of product life cycle management, Life cycle cost analysis, life cycle assessment and systems development life cycle.
• Virtuous circle and vicious circle.
• A business cycle, e.g. the RBC.
• A cycle count is an inventory management procedure
• The Wright Cycle Company which funded the brothers' Wright aviation experiments.

[edit] Economics

• Consumer Cyclical Sector

[edit] Telecommunication

• Duty cycle in telecommunication.

[edit] Crime

• Cycle of violence, the cycle that can happen in Domestic abuse.

[edit] Television

The show America's Next Top Model uses the word 'cycle' to mean 'season' e.g. their 1st season will be called Cycle 1, their 2nd season will be called Cycle 2, etc.

[edit] Related concepts

• List of cycles
• Periodicity

cs:Cyklus

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