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Cyclic code
A cyclic code is an error-correcting code in which every cyclic shift of a codeword is also a codeword, a property that makes encoding and decoding efficient.
Cyclic coordinate descent
Cyclic coordinate descent is an iterative inverse kinematics algorithm that adjusts one joint at a time, cycling through the joints of a chain to bring the end effector to a target.
Cyclic delay diversity
Cyclic delay diversity (CDD), also called cyclic shift diversity, is a multiple-antenna transmit diversity technique for OFDM in which each antenna sends a cyclically shifted copy of the same signal.
Cyclic pursuit
Cyclic pursuit is a decentralized coordination scheme in which each agent in a group pursues the next, forming a closed loop, used in multi-robot formation control.
Cyclic redundancy check
A cyclic redundancy check (CRC) is an error-detecting code that appends a checksum to data so receivers can detect corruption, used in Ethernet and telecommunications.
Cyclic steam stimulation
Cyclic steam stimulation, also called huff-and-puff or steam soak, is an enhanced oil recovery method in which steam is injected into a well, the well soaks, and heated oil is produced.
Cyclic-prefixed single-carrier equalization
Cyclic-prefixed single-carrier equalization (SC-FDE) is a transmission technique in which single-carrier blocks sent with a cyclic prefix are equalized at the receiver by FFT-based frequency-domain processing.
Cycloconverter
A cycloconverter is a power-electronic frequency changer that converts AC power at one frequency directly into AC power at a lower, controllable frequency, using thyristors and no intermediate DC link.
Cyclogyro
Cyclogyro (cyclocopter, cyclorotor, cycloidal propeller): a VTOL aircraft lifted by horizontal-axis rotors whose blades pivot about their own spanwise axes, vectoring thrust via pitch amplitude and phase; flown only at UAV scale, with CycloTech's CR-42 completing 800+ flights.
Cyclomatic complexity
Cyclomatic complexity, also known as the McCabe measure, is a software metric introduced by Thomas J. McCabe in 1976 that counts a program's independent execution paths.
CycloneDX
CycloneDX is an open bill of materials (BOM) specification describing software components, dependencies, and vulnerabilities. It began at OWASP in 2018 and is now the international standard ECMA-424.
Cyclonic separation
Cyclonic separation, done in a device called a cyclone separator, removes particles or droplets from gas or liquid by spinning the stream so centrifugal force flings particles to the wall.
Cyclorotor
A cyclorotor, or cycloidal rotor, is a propulsion device with parallel blades that can point thrust in any direction; on ships it appears as the Voith Schneider Propeller.
Cyclosarin
Cyclosarin (GF) is a colorless, odorless organophosphate nerve agent of the G series, a Schedule 1 chemical warfare agent and the most toxic G agent through the skin.
Cyclostationary feature detection
Cyclostationary feature detection is a signal-detection method that identifies signals by testing for periodicity in their statistics, such as autocorrelation, which stationary noise lacks, and is mainly used for spectrum sensing in cognitive radio.
Cydia
Cydia is a package manager for jailbroken iOS devices, created by Jay Freeman ("Saurik") in 2008, used to install software Apple does not distribute through its App Store.
Cyera
Cyera is an American-Israeli data security company, founded in 2021 and headquartered in New York City, selling an AI-native platform for discovering and protecting sensitive data across cloud environments.
CYGNSS
CYGNSS, the Cyclone Global Navigation Satellite System, is a NASA Earth Venture mission of eight microsatellites, launched in 2016, that measures near-surface ocean winds to improve hurricane forecasting.
Cygnus (spacecraft)
Cygnus is an uncrewed cargo spacecraft, originally built by Orbital Sciences and now made by Northrop Grumman, that delivers supplies to the International Space Station since 2013.
Cygnus Oil and Gas Field
Cygnus is a dry natural gas field in the UK Southern North Sea, the largest producing gas field in the United Kingdom, operated by Ithaca Energy since first gas in December 2016.
Cygwin
Cygwin is a collection of GNU and open-source tools and a runtime library that provides a Linux-like, POSIX-compatible environment on Microsoft Windows, letting most UNIX software run with few source changes.
Cyient
Cyient, formerly Infotech Enterprises, is an Indian engineering services company headquartered in Hyderabad, founded in 1991, renamed in 2014, with about 14,100 employees serving over 300 global customers.
Cylib
Cylib is a German lithium-ion battery recycling startup founded in 2022 in Aachen as a spin-off from RWTH Aachen University by Lilian Schwich, Paul Sabarny, and Gideon Schwich.
Cylinder (engine)
A cylinder is the fixed, closed-ended chamber of an internal combustion engine in which a reciprocating piston converts combustion gas pressure into mechanical work that rotates the crankshaft.
Cylinder Audio Archive
The UCSB Cylinder Audio Archive, also called the Cylinder Preservation and Digitization Project, is a free digital collection of over 15,000 phonograph cylinder recordings at UC Santa Barbara.
Cylinder deactivation
Cylinder deactivation (CDA), also called variable displacement, is an engine technique that cuts fuel and spark to some cylinders under light load, saving 4 to 10 percent in fuel on V6 and V8 engines.
Cylinder head
The cylinder head, or engine head, is the cast component bolted atop an engine's cylinders that seals them, forms the combustion chambers, and houses the valves.
Cylinder matrix numbers and take designations
Cylinder matrix numbers and take designations are identifiers on wax cylinder records: the matrix number identifies the master recording, and the take number identifies which attempt a pressing preserves.
Cylinder mould papermaking
Cylinder mold papermaking is a method of forming paper or board in which a rotating wire-covered cylinder in a pulp vat deposits a fiber layer, patented by John Dickinson in 1809.
Cylinder versus disc phonograph rivalry
The cylinder versus disc phonograph rivalry pitted Edison's wax cylinders against the lateral-cut discs of Emile Berliner and the Victor Talking Machine Company, with discs displacing cylinders between 1905 and 1929.