Libra

Libra may refer to:

Science and technology

Entertainment

Other

Libra (Gary Bartz album)

Libra is the debut album by saxophonist Gary Bartz' Quintet recorded in 1967 and released on the Milestone label.

Reception

Michael G. Nastos of Allmusic said "Featured are excellent compositions and playing in mainstream mode... This is the more lyrical side of Bartz".

Track listing

All compositions by Gary Bartz except as indicated

Personnel

References

Libra (DC Comics)

Libra is a fictional character, a supervillain appearing in comic books published by DC Comics. He first appeared in Justice League of America #111 (May-June 1974), where he formed the first incarnation of the Injustice Gang (though there had been other villain groups with similar names, like the Injustice Society and the Injustice League). Libra made his return with a leading role in Final Crisis in 2008.

Publication history

Libra's only major appearance, prior to his appearance in Final Crisis, was in Justice League of America #111–112, in 1974. In 2004, he made a brief cameo in the JLA/Avengers crossover (#4) by Kurt Busiek and George Pérez.

Grant Morrison, the writer of Final Crisis, explained the reason for picking an obscure villain:

In May 2008, his appearances were reprinted in DC Universe Special: Justice League of America at the same time as he was reintroduced, along with the Human Flame (a Martian Manhunter foe who appeared in Detective Comics #274), in Justice League of America #21. He returns, apparently retaining the full might of his godlike status, to lead a new and final incarnation of the Secret Society of Super-Villains, this time offering to every villain, from simple costumed crooks to major ones, the realization of his/her fondest wish.

ARC (file format)

ARC is a lossless data compression and archival format by System Enhancement Associates (SEA). It was very popular during the early days of networked dial-up BBS. The file format and the program were both called ARC. The ARC program made obsolete the previous use of a combination of the SQ program to compress files and the LU program to create .LBR archives, by combining both compression and archiving functions into a single program. Unlike ZIP, ARC is incapable of compressing entire directory trees. The format was subject to controversy in the 1980s—an important event in debates over what would later be known as open formats.

The .arc file extension is often used for several file archive-like file types. For example, the Internet Archive uses its own ARC format to store multiple web resources into a single file. The FreeArc archiver also uses .arc extension, but uses a completely different file format.

Nintendo uses an unrelated 'ARC' format for resources, such as MIDI, voice samples, or text, in GameCube and Wii games. Several unofficial extractors exist for this type of ARC file.

Inverse trigonometric functions

In mathematics, the inverse trigonometric functions (occasionally called cyclometric functions) are the inverse functions of the trigonometric functions (with suitably restricted domains). Specifically, they are the inverses of the sine, cosine, tangent, cotangent, secant, and cosecant functions. They are used to obtain an angle from any of the angle's trigonometric ratios. Inverse trigonometric functions are widely used in engineering, navigation, physics, and geometry.

Notation

There are several notations used for the inverse trigonometric functions.

The most common convention is to name inverse trigonometric functions using an arc- prefix, e.g., arcsin(x), arccos(x), arctan(x), etc. This convention is used throughout the article. When measuring in radians, an angle of θ radians will correspond to an arc whose length is rθ, where r is the radius of the circle. Thus, in the unit circle, "the arc whose cosine is x" is the same as "the angle whose cosine is x", because the length of the arc of the circle in radii is the same as the measurement of the angle in radians. Similar, in computer programming languages (also Excel) the inverse trigonometric functions are usually called asin, acos, atan.

Arc (Everything Everything album)

Arc is the second studio album by British indie pop band Everything Everything. It was released in the United Kingdom on 14 January 2013, having been preceded by the singles "Cough Cough" and "Kemosabe".

Track listing

Critical reception

Freddie Holmes of The Underclassed gave the album a positive review stating:

7digital featured Arc as album of the week, praising the record as "schizophrenic, electro-pop perfection."

Personnel

References