USA or U.S.A. usually refers to the United States of America, a country in North America.
USA or U.S.A. may also refer to:
USA-135, also known as GPS IIA-19, GPS II-28 and GPS SVN-38, is an American navigation satellite which forms part of the Global Positioning System. It was the last of nineteen Block IIA GPS satellites to be launched.
USA-135 was launched at 00:30:00 UTC on 6 November 1997, atop a Delta II carrier rocket, flight number D249, flying in the 7925-9.5 configuration. The launch took place from Launch Complex 17A at the Cape Canaveral Air Force Station, and placed USA-135 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.
On 13 December 1997, USA-135 was in an orbit with a perigee of 19,912 kilometres (12,373 mi), an apogee of 20,449 kilometres (12,706 mi), a period of 717.9 minutes, and 54.9 degrees of inclination to the equator. It broadcasts the PRN 08 signal, and operates in slot 3 of plane A of the GPS constellation. The satellite has a mass of 1,816 kilograms (4,004 lb). It had a design life of 7.5 years, but it actually remained in service until October 30, 2014.
USA-200, also known as NRO Launch 28 or NROL-28, is an American signals intelligence satellite, operated by the National Reconnaissance Office. Launched in 2008, it has been identified as the second satellite in a series known as Improved Trumpet, Advanced Trumpet, or Trumpet follow-on; a replacement for the earlier Trumpet series of satellites.
USA-200 was launched by an Atlas V carrier rocket, flying in the 411 configuration, operated by United Launch Alliance. The rocket was the first Atlas V to launch from Vandenberg Air Force Base, flying from Space Launch Complex 3E. Liftoff occurred at 10:02 UTC (03:02 PDT) on 13 March 2008. It was identified as NRO Launch 28, and was the thirteenth flight of an Atlas V. The rocket had the tail number AV-006.
The satellite's orbit and mission are officially classified, however like most classified spacecraft it has been located and tracked by amateur observers. It is in a Molniya orbit with a perigee of 1,111 kilometres (690 mi), an apogee of 37,580 kilometres (23,350 mi), and 63.5 degrees of inclination. In addition to its SIGINT payload, USA-200 also carries two secondary instruments; the SBIRS-HEO-2 missile detection payload as part of the Space-Based Infrared System programme, and NASA's TWINS-2 or TWINS-B magnetospheric science instrument as part of the TWINS programme.
In graph drawing, the area used by a drawing is a commonly used way of measuring its quality.
For a drawing style in which the vertices are placed on the integer lattice, the area of the drawing may be defined as the area of the smallest axis-aligned bounding box of the drawing: that is, it the product of the largest difference in x-coordinates of two vertices with the largest difference in y-coordinates. For other drawing styles, in which vertices are placed more freely, the drawing may be scaled so that the closest pair of vertices have distance one from each other, after which the area can again be defined as the area of a smallest bounding box of a drawing. Alternatively, the area can be defined as the area of the convex hull of the drawing, again after appropriate scaling.
For straight-line drawings of planar graphs with n vertices, the optimal worst-case bound on the area of a drawing is Θ(n2). The nested triangles graph requires this much area no matter how it is embedded, and several methods are known that can draw planar graphs with at most quadratic area.Binary trees, and trees of bounded degree more generally, have drawings with linear or near-linear area, depending on the drawing style. Every outerplanar graph has a straight-line outerplanar drawing with area subquadratic in its number of vertices, If bends or crossings are allowed, then outerplanar graphs have drawings with near-linear area. However, drawing series-parallel graphs requires an area larger than n by a superpolylogarithmic factor, even if edges can be drawn as polylines.
Area - International POPular Group, most commonly known as Area or AreA, is an Italian progressive rock, jazz fusion, electronic, experimental group formed in 1972 by singer Demetrio Stratos and drummer Giulio Capiozzo. They are considered one of the most respected and important bands of the blooming 1970s Italian progressive rock scene.
Area were formed in Milan in 1972. Originally composed of Demetrio Stratos, Giulio Capiozzo (drums and percussion), Victor Edouard "Eddie" Busnello (saxophone and flutes), Leandro Gaetano (piano), and Johnny Lambizzi (guitar), soon followed by Patrick Djivas (bass) and Patrizio Fariselli (keyboards and piano). The band was led by Demetrio Stratos, an original and talented singer originally from Greece. In 1973, Johnny Lambizzi left the band and was replaced by Paolo Tofani (guitar and synth). In that year, they recorded their first studio album Arbeit macht frei ("Work Brings Freedom"), taken from the inscription that was found on the gate at the entrance to Auschwitz Nazi concentration camp, was released by Cramps Records and the band performed in many musical and cultural events. Area went on tour in Chile and, representing Italy, they took part in the eighth Biennale de Paris. At that time, Area's sound was an odd mish-mash that drew from rock, jazz, Eastern, and Arabic music, and it was the blending of all sorts of music that made the band stand out. The band soon grew to prominence because the youth of the time were able to identify with Area's socialist lyrics, and the band was founded on a strong and virtuosic musicianship. To aficionados of Italian progressive rock, their debut album Arbeit macht frei is considered a classic.
Forest is the seventh album of pianist George Winston and his sixth solo piano album, released in 1994. It was reissued on Dancing Cat Records in 2008. The album won the 1996 Grammy Award for Best New Age Album. "Japanese Music Box (Itsuki No Komoriuta)" is a traditional Japanese lullaby that means Lullaby of Itsuki, a region in southern Japan.