Rewriting

In mathematics, computer science, and logic, rewriting covers a wide range of (potentially non-deterministic) methods of replacing subterms of a formula with other terms. What is considered are rewriting systems (also known as rewrite systems, rewrite engines or reduction systems). In their most basic form, they consist of a set of objects, plus relations on how to transform those objects.

Rewriting can be non-deterministic. One rule to rewrite a term could be applied in many different ways to that term, or more than one rule could be applicable. Rewriting systems then do not provide an algorithm for changing one term to another, but a set of possible rule applications. When combined with an appropriate algorithm, however, rewrite systems can be viewed as computer programs, and several declarative programming languages are based on term rewriting.

Intuitive examples

Logic

In logic, the procedure for obtaining the conjunctive normal form (CNF) of a formula can be conveniently written as a rewriting system. The rules of such a system would be:

Termination (album)

Termination (ターミネーション, Tāminēshon) is the full-length debut album of the Japanese rock band 9mm Parabellum Bullet. The songs "Heat-Island" and "The World" were re-recorded from their limited-release mini album, The World e.p..

Tracklist

PV

Personnel

Termination of employment

Termination of employment is an employee's departure from a job. Termination may be voluntary on the employee's part, or it may be at the hands of the employer, often in the form of dismissal (firing) or a layoff. Dismissal or firing is generally thought to be the fault of the employee, whereas a layoff is generally done for business reasons (for instance a business slowdown or an economic downturn) outside the employee's performance.

Firing carries a stigma in many cultures, and may hinder the jobseeker's chances of finding new employment, particularly if he or she has been sacked from previous jobs. Jobseekers sometimes do not mention jobs from which they were fired on their résumés; accordingly, unexplained gaps in employment, and refusal or failure to contact previous employers are often regarded as "red flags".

Dismissal

Dismissal is where the employer chooses to require the employee to leave, generally for a reason which is the fault of the employee. The most common colloquial terms for dismissal in America is "getting fired" or "getting canned" whereas in Britain the term "getting the sack" or "getting sacked" is also used.

Data segment

In computing, a data segment (often denoted .data) is a portion of an object file or the corresponding virtual address space of a program that contains initialized static variables, that is, global variables and static local variables. The size of this segment is determined by the size of the values in the program's source code, and does not change at run time.

The data segment is read-write, since the values of variables can be altered at run time. This is in contrast to the read-only data segment (rodata segment or .rodata), which contains static constants rather than variables; it also contrasts to the code segment, also known as the text segment, which is read-only on many architectures. Uninitialized data, both variables and constants, is instead in the BSS segment.

Historically, to be able to support memory address spaces larger than the native size of the internal address register would allow, early CPUs implemented a system of segmentation whereby they would store a small set of indexes to use as offsets to certain areas. The Intel 8086 family of CPUs provided four segments: the code segment, the data segment, the stack segment and the extra segment. Each segment was placed at a specific location in memory by the software being executed and all instructions that operated on the data within those segments were performed relative to the start of that segment. This allowed a 16-bit address register, which would normally provide 64KiB (65536 bytes) of memory space, to access a 1MiB (1048576 bytes) address space.

Data (disambiguation)

Data is uninterpreted information.

Data or DATA may also refer to:

Music

DATA (band)

DATA were an electronic music band created in the late 1970s by Georg Kajanus, creator of such bands as Eclection, Sailor and Noir (with Tim Dry of the robotic/music duo Tik and Tok). After the break-up of Sailor in the late 1970s, Kajanus decided to experiment with electronic music and formed DATA, together with vocalists Francesca ("Frankie") and Phillipa ("Phil") Boulter, daughters of British singer John Boulter.

The classically orientated title track of DATA’s first album, Opera Electronica, was used as the theme music to the short film, Towers of Babel (1981), which was directed by Jonathan Lewis and starred Anna Quayle and Ken Campbell. Towers of Babel was nominated for a BAFTA award in 1982 and won the Silver Hugo Award for Best Short Film at the Chicago International Film Festival of the same year.

DATA released two more albums, the experimental 2-Time (1983) and the Country & Western-inspired electronica album Elegant Machinery (1985). The title of the last album was the inspiration for the name of Swedish pop synth group, elegant MACHINERY, formerly known as Pole Position.