# sector

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Related to transport sector: Means of transport

## sector

1. Geometry either portion of a circle included between two radii and an arc. Area: ½r2θ, where r is the radius and θ is the central angle subtended by the arc (in radians)
2. a measuring instrument consisting of two graduated arms hinged at one end
3. Computing the smallest addressable portion of the track on a magnetic tape, disk, or drum store

## Sector

(1) A sector in the plane is a region bounded by two rays issuing from an interior point of a figure and by an arc of its boundary cut off by these rays. In particular, a sector of a circle is bounded by two radii and an arc cut off by the radii. The area of a sector of a circle is equal to lr/2 or πr2α /360, where l is the length of the arc, α is the central angle (in degrees) subtended by the arc, and r is the radius of the circle.

(2) A sector in space is the part of a solid bounded by a conical surface whose vertex is in the solid and by the part of the solid’s surface cut off by the conical surface. A spherical sector is an example of a sector in space.

## sector

[′sek·tər]
(computer science)
A portion of a track on a magnetic disk or a band on a magnetic drum.
A unit of data stored in such a portion.
(civil engineering)
A clearly defined area or airspace designated for a particular purpose.
(electromagnetism)
Coverage of a radar as measured in azimuth.
(mathematics)
A portion of a circle bounded by two radii and an arc joining their end points.
(meteorology)
Something resembling the sector of a circle, as a warm sector between the warm and cold fronts of a cyclone.

## sector

The smallest unit of data that is written to and read from a storage drive. The initial hard disk sector sizes were 128 and 256 bytes long but were later increased to 512. Eventually, sectors were enlarged to the "Advanced Format" size of 4,096 bytes. See cluster, sector interleave and magnetic disk.
References in periodicals archive ?
There are significant barriers to dialogue about prevention services for transport sector workers.
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Another sub-committee to specify the priorities in transport sector was formed.
Drug use is not unfamiliar in the transport sector.
The EU, the member states and the inland waterway transport sector itself would each contribute one third of funding.
com/research/b7d3a1/trends_in_the_tran) has announced the addition of OECD Publishing 's new report "Trends in the Transport Sector 2011" to their offering.
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LAHORE -- Chinese company will invest in urban transport sector as well as establish state-of-the-art setup for Drivers Training Simulator program.
29 (Petra) -- The American Chamber of Commerce in Jordan, on Monday, hosted, Minister of Transport, Ayman Hatahet, for a discussion on investment opportunities the transport sector provides as well as challenges facing it.
President ICCI Atif Ikram said that LNG can be best used in transport sector to save billions in oil import bill but this sector is being discouraged systematically.
The Minister seized the occasion to shed light on what he described as a chaotic situation storming the public transport sector in Lebanon.

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