polar coordinate
121Phase angle — In the context of vectors and phasors, the term phase angle refers to the angular component of the polar coordinate representation. The notation Aang ! heta, for a vector with magnitude (or amplitude ) A and phase angle θ, is called angle… …
122Meridian — Meridian, or a meridian line may refer to: Contents 1 Earth science 2 United States geography 3 Arts and entertainment …
123Fourier transform — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms The Fourier transform is a mathematical operation that decomposes a function into its constituent… …
124Barcode — For the taxonomic method, see DNA barcoding. A UPC A barcode symbol A barcode is an optical machine readable representation of data, which shows data about the object to which it attaches. Originally barcodes represented data by varying the… …
125Boy's surface — In geometry, Boy s surface is an immersion of the real projective plane in 3 dimensional space found by Werner Boy in 1901 (he discovered it on assignment from David Hilbert to prove that the projective plane could not be immersed in 3 space).… …
126Celestial mechanics — is the branch of astrophysics that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital… …
127Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
128Code 39 — A Code 39 Barcode Label WIKIPEDIA encoded in Code 39 Code 39 (also known as Alpha39, Code 3 of 9, Code 3/9, Type 39 …
