Field (agriculture)

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.

Language

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.

Image gallery

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

Field (computer science)

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.

Fixed length

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.

Field (mathematics)

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.

SEA

SEA or Sea may refer to:

Organizations

Science and technology

Seah (unit)

The se'ah or seah (Hebrew: סאה‎) is a unit of dry measure of ancient origin used in Halakha (Jewish law), which equals one third of an ephah, or bath. Its size in modern units varies widely according to the criteria used for defining it.

According to Herbert G. May, chief editor of two classic Bible-related reference books, the bath may be archaeologically determined to have been about 5.75 gallons (22 liters) from a study of jar remains marked 'bath' and 'royal bath' from Tell Beit Mirsim. Since the bath unit has been established to be 22 litres, 1 se'ah would equal 7.33 litres or 7.33dm³.

In the context of a mikveh, a se'ah can be about twice as much in order to accommodate even the most stringent rabbinical ruling on immersion. A mikveh must, according to the classical regulations, contain enough water to cover the entire body of an average-sized person; based on a mikveh with the dimensions of 3 cubits deep, 1 cubit wide, and 1 cubit long, the necessary volume of water was estimated as being 40 se'ah of water. The exact volume referred to by a seah is debated, and classical rabbinical literature specifies only that it is enough to fit 144 eggs; most Orthodox Jews use the stringent ruling of the Avrohom Yeshaya Karelitz, according to which one seah is 14.3 litres, and therefore a mikveh must contain approximately 575 litres . This volume of water could be topped up with water from any source, but if there were less than 40 seahs of water in the mikveh, then the addition of 3 or more pints of water from an unnatural source would render the mikveh unfit for use, regardless of whether water from a natural source was then added to make up 40 seahs from a natural source; a mikveh rendered unfit for use in this way would need to be completely drained away and refilled from scratch.

90.9 Sea FM

90.9 Sea FM (callsign 4SEA) is a radio station on the Gold Coast, Queensland, Australia. It is part of the Southern Cross Austereo Today Network, and is also the network hub for the regional Today Stream, broadcasting shows at times from 9am - 12am across the Sea, Star and Hot FM Networks across Australia.

The Sea FM brand name and original logo was created by Gold Coast Broadcasters Pty Ltd for just the one station - 90.9 Sea FM - after the Gold Coast was granted a new commercial FM licence. 90.9 Sea FM began broadcasting in 1989 with programming consulted by Austereo. The original Sea FM on-air line-up was a strong team of experienced Announcers, many having made their name previously in Metropolitan radio including - Craig Bruce (FOX FM) & Sammy Power, Ian 'Lofty' Fulton (4IP), Grahame "Durry" Rodgers (2SM & 2NX), Sue Moses (2MMM & Channel 10), Gregg Easton (2UW & 4BK), Joe Miller (3XY & EON FM), Dean Miller and Simon Franks.

In November 2011, controversy erupted after rumours surfaced that popular long-term breakfast co-host, Moyra Major, was to be replaced by entertainer Charli Robinson, after Robinson had filled in for six weeks while Major was on maternity leave. It was reported that Major had been replaced due to a significant increase in ratings for the breakfast show during Robinson's stint as co-host.