Atlas

An atlas is a collection of maps; it is typically a map of Earth or a region of Earth, but there are atlases of the other planets (and their satellites) in the Solar System. Furthermore, atlases of anatomy exist, mapping out the human body or other organisms. Atlases have traditionally been bound into book form, but today many atlases are in multimedia formats. In addition to presenting geographic features and political boundaries, many atlases often feature geopolitical, social, religious and economic statistics. They also have information about the map and places in it.

Etymology

The word atlas dates from 1636, first in reference to the English translation of Atlas, sive cosmographicae meditationes de fabrica mundi (1585) by Flemish geographer Gerhardus Mercator, who might have been the first to use this word in this way. A picture of the Titan Atlas holding up the world appeared on the frontispiece of this and other early map collections.

History

The first work that contained systematically arranged woodcut maps of uniform size, intended to be published in a book, thus representing the first modern atlas, was De Summa totius Orbis (1524–26) by the 16th-century Italian cartographer Pietro Coppo. Nonetheless, this distinction is conventionally awarded to the Flemish cartographer Abraham Ortelius who in 1570 published the collection of maps Theatrum Orbis Terrarum.

Atlas (computer)

The Atlas Computer was a joint development between the University of Manchester, Ferranti, and Plessey. The first Atlas, installed at Manchester University and officially commissioned in 1962, was one of the world's first supercomputers, considered to be the most powerful computer in the world at that time. It was said that whenever Atlas went offline half of the United Kingdom's computer capacity was lost. It was a second-generation machine, using discrete germanium transistors. Two other Atlas machines were built: one for British Petroleum and the University of London, and one for the Atlas Computer Laboratory at Chilton near Oxford.

A derivative system was built by Ferranti for Cambridge University. Called the Titan, or Atlas 2, it had a different memory organisation and ran a time-sharing operating system developed by Cambridge University Computer Laboratory. Two further Atlas 2s were delivered: one to the CAD Centre in Cambridge (later called CADCentre, then AVEVA), and the other to the Atomic Weapons Research Establishment (AWRE), Aldermaston.

Atlas (topology)

In mathematics, particularly topology, one describes a manifold using an atlas. An atlas consists of individual charts that, roughly speaking, describe individual regions of the manifold. If the manifold is the surface of the Earth, then an atlas has its more common meaning. In general, the notion of atlas underlies the formal definition of a manifold and related structures such as vector bundles and other fibre bundles.

Charts

The definition of an atlas depends on the notion of a chart. A chart for a topological space M (also called a coordinate chart, coordinate patch, coordinate map, or local frame) is a homeomorphism from an open subset U of M to an open subset of Euclidean space. The chart is traditionally recorded as the ordered pair .

Formal definition of atlas

An atlas for a topological space M is a collection of charts on M such that . If the codomain of each chart is the n-dimensional Euclidean space and the atlas is connected, then M is said to be an n-dimensional manifold.

Mirage (race car)

The Mirage Lightweight Racing Car was a brand of race cars built by J.W. Automotive Engineereing (JWAE) at Slough in England, initially to compete in international sports car races in the colours of the Gulf Oil Corporation.

For the 1967 season, JWAE built and raced the M1, a Sports prototype based on the Ford GT40. The M1 used the standard Ford GT40 V8 engine in various capacities up to 5.7 litres. The highlight of the M1's short racing career was without doubt the victory by Jacky Ickx and Dick Thompson in chassis M.1003 in the 1967 Spa-Francorchamps 1000 km. The sole surviving Mirage M1 is on public display at the Blackhawk Museum in Danville, California (still on display late April 2015).

The M2 was built in 1968 for the new 3 Litre Group 6 Prototype class, but the BRM V12 powered cars were rarely raced and met with no success. The revised and roofless M3 of 1969 was powered by the Ford Cosworth DFV V8 but again this model saw little use, JWA having largely concentrated on racing Ford GT40s during these two years.

Dassault Mirage

Mirage was a name given to several types of jet aircraft designed by the French company Dassault Aviation (formerly Avions Marcel Dassault), some of which were produced in different variants. Most were of delta wing configuration. The most successful was the Mirage III fighter in its many variants, which were widely produced both by Dassault and by other companies. Some Mirage variants were given different names.

Mirage III/5/50 series

The most successful line of Mirages were a family of supersonic delta-winged fighters, all sharing the same basic airframe but differing in powerplant, equipment and minor details. Early examples were tailless, while many later variants had canard foreplanes added.

The main production variants include:

Minor projects and prototypes include:

Mirage (M. Pokora song)

"Mirage" is a song performed by French singer M. Pokora. It was written by Pokora and co-written and produced by Gee Futuristic. It serves as the second single from Pokora's fourth studio album Mise à Jour. It was released on November 22, 2010.

Chart performance

"Mirage" has been listed for 6 weeks on the France Singles Top 100. It entered the chart on position 72 on week 4/2011, and its last appearance was on week 9/2011. It peaked on number 64, where it stayed for 1 week.

Music video

A music video was released on November 25, 2010 and it shows Pokora dancing with a number of dancers in a studio full of lights.

Charts

Notes