Skew


Skew

Skew or skew lines lie on different planes. They are neither parallel nor intersecting.

Mathematics

*In geometry, straight lines in a space referred to as skew if they are neither parallel nor intersecting.
*In statistics, skew is sometimes used as an alternative term to skewness to refer to the degree of asymmetry of a distribution. It can mean distortion in a positive or negative direction. [ [http://bridgefieldgroup.com/bridgefieldgroup/glos8.htm Bridgefield Group ERP/supply chain glossary ] ]

Telecommunication

* In parallel transmission, the difference in arrival time of bits transmitted at the same time.

* For data recorded on multichannel magnetic tape, the difference between reading times of bits recorded in a single transverse line.

"Nte:" Skew is usually interpreted to mean the difference in reading times between bits recorded on the tracks at the extremities, or edges, of the tape.

* In facsimile systems, the angular deviation of the received frame from rectangularity caused by asynchronism between the scanner and the recorder.

"Note:" Skew is expressed numerically as the tangent of the deviation angle.

* In facsimile, the angle between the scanning line, or recording line, and the perpendicular to the paper path.

::"Example of +1 degree (counter-clockwise) skew in a facsimile image. The red line is perfectly horizontal."

"Source": from Federal Standard 1037C and from MIL-STD-188

Computers

* In reference to computer disk drives, track-to-track skew is the angle between the start of the data on a given track and the start of the data on the next. This is important, as when reading the data in sequence from one track to the next, time must be allowed for the read/write head to move to the next track, during which the disk continues to rotate. Insufficient skew can force the drive to wait almost an entire revolution for the data to pass under the head again, resulting in extra revolutions per track to read the data. Excessive skew can also lower the sustained data transfer rate.

Computer graphics

Skew is a common term for the shear mapping.

Optics

In optics, a skew ray is an optical path through a rotationally symmetric optical system that is not in a plane of symmetry.

References


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Look at other dictionaries:

  • Skew — Skew, a. Turned or twisted to one side; situated obliquely; skewed; chiefly used in technical phrases. [1913 Webster] {Skew arch}, an oblique arch. See under {Oblique}. {Skew back}. (Civil Engin.) (a) The course of masonry, the stone, or the iron …   The Collaborative International Dictionary of English

  • Skew — (von engl. skew „schief“, „windschief“) steht für: Skew (Elektronik), die Differenz von Signallaufzeiten in der Elektronik Skew (Hydrodynamik), eine hydrodynamische Anstellwinkelkorrektur bei Propellern Skew (Satellit), die Abweichung des… …   Deutsch Wikipedia

  • skew — skew; skew·er·ing; skew·ness; skew·bald; skew·er; skew·er·er; …   English syllables

  • skew — skew, skewness Term used to describe an asymmetrical probability distribution. American Banker Glossary * * * skew UK US /skjuː/ verb [T] ► to cause results, figures, profits, etc. to seem higher or lower than they really are: » Independent… …   Financial and business terms

  • Skew — Skew, v. t. [See {Skew}, adv.] 1. To shape or form in an oblique way; to cause to take an oblique position. [1913 Webster] 2. To throw or hurl obliquely. [1913 Webster] …   The Collaborative International Dictionary of English

  • Skew — Skew, n. (Arch.) A stone at the foot of the slope of a gable, the offset of a buttress, or the like, cut with a sloping surface and with a check to receive the coping stones and retain them in place. [1913 Webster] …   The Collaborative International Dictionary of English

  • Skew — Skew, v. i. [imp. & p. p. {Skewed}; p. pr. & vb. n. {Skewing}.] 1. To walk obliquely; to go sidling; to lie or move obliquely. [1913 Webster] Child, you must walk straight, without skewing. L Estrange. [1913 Webster] 2. To start aside; to shy, as …   The Collaborative International Dictionary of English

  • Skew — Skew, adv. [Cf. D. scheef. Dan. ski?v, Sw. skef, Icel. skeifr, G. schief, also E. shy, a. & v. i.] Awry; obliquely; askew. [1913 Webster] …   The Collaborative International Dictionary of English

  • skew — [skju:; engl. = schräg, schief]: svw. ↑ synklinal …   Universal-Lexikon

  • skew — [skju:] v [T] [Date: 1300 1400; : Old North French; Origin: escuer to avoid ] 1.) if something skews the results of a test etc, it affects the results, making them incorrect ▪ All the people we questioned lived in the same area, which had the… …   Dictionary of contemporary English