Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure.

Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre; similarly, the pound-force per square inch (psi) is the traditional unit of pressure in the imperial and US customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure and the torr is defined as ¹⁄₇₆₀ of this. Manometric units such as the centimetre of water, millimetre of mercury and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

Definition

Pressure is the amount of force acting per unit area. The symbol for pressure is p or P. The IUPAC recommendation for pressure is a lower-case p. However, upper-case P is widely used. The usage of P vs p depends on the field in which one is working, on the nearby presence of other symbols for quantities such as power and momentum, and on writing style.

Pressure (disambiguation)

Pressure is an effect which occurs when a force is applied on a surface.

Pressure also may refer to:

Music

Entertainment

Other uses

See also

Billy Ocean

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Billy Ocean (born Leslie Sebastian Charles; 21 January 1950) is a Trinidadian-born English recording artist who had a string of R&B international pop hits in the 1970s and 1980s. He was the most popular British R&B singer-songwriter of the early to mid-1980s. After scoring his first four UK Top 20 successes, seven years passed before he accumulated a series of transatlantic successes, including three U.S. number ones. In 1985, Ocean won the Grammy Award for Best Male R&B Vocal Performance for his worldwide hit, "Caribbean Queen", and in 1987 was nominated for the Brit Award for Best British Male Artist.

In 2002, the University of Westminster, London, awarded Ocean an honorary doctorate of music. In 2010, Ocean was presented with the Lifetime Achievement Award at the MOBO Awards. On 29 July 2011, Ocean became a Companion of the Liverpool Institute for Performing Arts, presented to him by Sir Paul McCartney. He is a member of the Rastafari movement.

Kraken (supercomputer)

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.

History

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).

Kraken (character)

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.

DC Comics

Sea creatures

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 (band)

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