In agriculture, a field is an area of land, enclosed or otherwise, used for agricultural purposes such as cultivating crops or as a paddock or other enclosure for livestock. A field may also be an area left to lie fallow or as arable land.
Many farms have a field border, usually composed of a strip of shrubs and vegetation, used to provide food and cover necessary for the survival of wildlife. It has been found that these borders may lead to an increased variety of animals and plants in the area, but also in some cases a decreased yield of crops.
In Australian and New Zealand English, any agricultural field may be called a paddock. If stock are grazed there, the space may be called a run, e.g. sheep run; cattle run.
A green field or paddock with Hereford cattle
A green field or paddock with Hereford cattle
A summer field
A summer field
Spring fields with trees, Majorca, Spain, 2004
Spring fields with trees, Majorca, Spain, 2004
In computer science, data that has several parts, known as a record, can be divided into fields. Relational databases arrange data as sets of database records, also called rows. Each record consists of several fields; the fields of all records form the columns.
In object-oriented programming, field (also called data member or member variable) is the data encapsulated within a class or object. In the case of a regular field (also called instance variable), for each instance of the object there is an instance variable: for example, an Employee
class has a Name
field and there is one distinct name per employee. A static field (also called class variable) is one variable, which is shared by all instances.
Fields that contain a fixed number of bits are known as fixed length fields. A four byte field for example may contain a 31 bit binary integer plus a sign bit (32 bits in all). A 30 byte name field may contain a persons name typically padded with blanks at the end. The disadvantage of using fixed length fields is that some part of the field may be wasted but space is still required for the maximum length case. Also, where fields are omitted, padding for the missing fields is still required to maintain fixed start positions within a record for instance.
In mathematics, a field is one of the fundamental algebraic structures used in abstract algebra. It is a nonzero commutative division ring, or equivalently a ring whose nonzero elements form an abelian group under multiplication. As such it is an algebraic structure with notions of addition, subtraction, multiplication, and division satisfying the appropriate abelian group equations and distributive law. The most commonly used fields are the field of real numbers, the field of complex numbers, and the field of rational numbers, but there are also finite fields, algebraic function fields, algebraic number fields, p-adic fields, and so forth.
Any field may be used as the scalars for a vector space, which is the standard general context for linear algebra. The theory of field extensions (including Galois theory) involves the roots of polynomials with coefficients in a field; among other results, this theory leads to impossibility proofs for the classical problems of angle trisection and squaring the circle with a compass and straightedge, as well as a proof of the Abel–Ruffini theorem on the algebraic insolubility of quintic equations. In modern mathematics, the theory of fields (or field theory) plays an essential role in number theory and algebraic geometry.
University (Chinese: 大學) is one of the 15 constituencies in the Central & Western District of Hong Kong. It has been represented since 1994 by Stephen Chan Chit-kwai in the Central & Western District Council.
The constituency is loosely based on the area around its namesake University of Hong Kong's Main Campus in Mid-Levels, with an estimated population of 18,535.
University constituency is roughly based on the western portion of the Mid-levels, bounded on the north by Bonham Road and on the west by Pok Fu Lam Road, except for a small section of the latter outside HKU's Jockey Club Student Village.
The constituency covers the whole of the University of Hong Kong's Main Campus as well as the student accommodations of St. John's College and Jockey Club Student Village.
Bordering University are the constituencies of Kwun Lung, Belcher, Water Street, Centre Street, Tung Wah, Castle Road and Peak, as well as the Pok Fu Lam constituency of Southern District.
University (formerly South Campus until September 1, 2003) is a Buffalo Metro Rail station located near the intersection of Main Street and Niagara Falls Boulevard on the University at Buffalo South Campus. It is a major transfer point between Metro Rail and many city and suburban bus routes, and offers a unique "Kiss and Ride" facility on the top level, above the ticket mezzazine. This allows drivers of automobiles a separate area to drop off passengers, so they do not add to the traffic congestion from buses at the station during rush-hour periods and a large park-and-ride facility directly to the east of the station. Since University Station serves as a terminal, immediately south is a double crossover. From May 20, 1985 to November 10, 1986, due to construction issues at LaSalle Station, Amherst Street Station served as the northern terminus. Since November 10, 1986, University Station serves as the northern terminus.
University Station serves UB South and transfer point for buses to the north and northeast suburbs of the city and is one of only four stations that offers an off-road bus loop, requiring passengers to board/debark using curbside stops (the other three being LaSalle Station, located 4,224 feet south, Delavan/Canisius College Station, located 15,840 feet south and Utica Station, located 20,592 feet south) and is served by 11 bus routes:
University may refer to: