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 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.
The word data has generated considerable controversy on if it is a singular, uncountable noun, or should be treated as the plural of the now-rarely-used datum.
In one sense, data is the plural form of datum. Datum actually can also be a count noun with the plural datums (see usage in datum article) that can be used with cardinal numbers (e.g. "80 datums"); data (originally a Latin plural) is not used like a normal count noun with cardinal numbers and can be plural with such plural determiners as these and many or as a singular abstract mass noun with a verb in the singular form. Even when a very small quantity of data is referenced (one number, for example) the phrase piece of data is often used, as opposed to datum. The debate over appropriate usage continues, but "data" as a singular form is far more common.
In English, the word datum is still used in the general sense of "an item given". In cartography, geography, nuclear magnetic resonance and technical drawing it is often used to refer to a single specific reference datum from which distances to all other data are measured. Any measurement or result is a datum, though data point is now far more common.
Kraken was a Cray XT5 supercomputer that entered into full production mode on February 2, 2009. Kraken was operated by the University of Tennessee and was the most powerful computer in the world managed by academia at the time. It was housed in the Oak Ridge Leadership Computing facility at Oak Ridge National Laboratory. Kraken was decommissioned on April 30, 2014.
Kraken's history began in 1991 with the establishment of the Joint Institute for Computational Sciences (JICS), a joint venture between the University of Tennessee and Oak Ridge National Laboratory. The JICS facility, the UT campus building in which JICS is housed, is one of the only state-owned buildings ever built on the campus of a national laboratory. The main goals of JICS are to create new ways to simulate and model data using supercomputers and to train future engineers and scientists on the use of these techniques.
The next major event in the establishment of Kraken occurred in the Spring of 2008 when the National Science Foundation awarded the University of Tennessee a $65 million grant to build and operate a supercomputer in order to aid public research in academia; the grant provided $30 million for the hardware and $35 million for the operation of the system. The supercomputer was housed at Oak Ridge Leadership Computing Facility and managed by the University of Tennessee's National Institute for Computational Sciences (NICS).
The Kraken is a name given to several aquatic monsters inspired by the legend of Kraken and several characters that have appeared primarily in DC Comics and Marvel Comics publications.
Three versions appeared during the Golden Age of Comic Books: the first in Adventure Comics #56 (Nov. 1940), a second, land-based version existing on the planet Venus in Flash Comics #81 (March 1947) and a third variation capable of speech that claimed to be the actual Kraken from ancient folklore who battled the hero Captain Marvel in Whiz Comics #155 (June 1953).
Two versions appeared during the Silver Age of Comic Books: a giant octopus encountered by the Challengers of the Unknown in Showcase #12 (Jan.-Feb 1958), and the second being a giant squid summoned by the hero Aquaman in Aquaman #34 (July-Aug. 1967). Wonder Woman #247 (Sept. 1978) and #289 (March 1982) featured additional versions, and in Wonder Woman vol. 2 #75 (June 1993) the character encountered a version complete with tiara in a dream dimension. In Aquaman #1,000,000 (Nov. 1998), the eponymous hero of the title encounters one of the "Krakens of Vexjor", a race of huge tentacled reptilian sea monsters that inhabit Earth's oceans in the 853rd Century. Wonder Woman and Aquaman also encounter a young Kraken in Issue #1 (Aug. 2011, DC Comics) of the limited series Flashpoint: Wonder Woman and the Furies.
Kraken is a Rock band founded in Medellín, Colombia, in 1983. The current lineup consists of Andrés Leiva (guitar), Ricardo Wolff (guitar), Julian Puerto (drums), Luis Alberto Ramírez (bass guitar), Rubén Gelvez (electronic keyboards), and Elkin Ramírez (vocalist). The sound of the band is characterized by a mixture of hard rock and heavy metal, a musical experiment that remains effective to this day.
The particular voice of Elkin Ramírez gives Kraken a seal of originality that has drawn the admiration of thousands of fans, and legions of imitators wishing to reproduce his interpretive style. One of the bands that influenced Ramírez' musical taste was Led Zeppelin. Another well-known influence of his is classical music, which he self-taught upon the advice of his father. Elkin is commonly referred as "Elkin Kraken" amongst the fans.
On the other hand, the guitarist Andrés Leiva contributes to the band his symphonic experience, gained as a student of the classical guitarist Pedro de Alcántara . Owner of a polished and virtuous technique, Leiva has been a member of a variety of different musical projects, making him a valuable addition to the band. On December 18 2013 the band celebrated its 30th anniversary and filmed the show for an upcoming DVD