Metropolis

A metropolis is a large city or urban area which is a significant economic, political, and cultural center for a country or region, and an important hub for regional or international connections, commerce, and communications. The term is Greek and means the "mother city" of a colony (in the ancient sense), that is, the city which sent out settlers. This was later generalized to a city regarded as a center of a specified activity, or any large, important city in a nation.

A big city belonging to a larger urban agglomeration, but which is not the core of that agglomeration, is not generally considered a metropolis but a part of it. The plural of the word is most commonly metropolises.

For urban centers outside metropolitan areas that generate a similar attraction at smaller scale for their region, the concept of the regiopolis, short regio, was introduced by German professors in 2006.

History

In the past, metropolis was the designation for a city or state of origin of a colony. Many large cities founded by ancient civilizations have been considered important world metropolises of their times due to their large populations and importance. Some of these ancient metropolises survived until the modern days and are among the world's oldest continuously inhabited cities.

Metropolis (Swords album)

Metropolis is the first studio album by the indie rock band Swords. It was released in 2005 on Arena Rock Recording Co.. The album is the third release from the group, originally named The Swords Project.

Track listing

External links

Metropolis (band)

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Metropolis was a German band in the mid-1970s from West Berlin, initiated by former members of other Berlin bands Tom Hildebrandt (Mythos) and Manfred Opitz and Michael Westphal (Zarathustra). Michael Duwe joined them after returning from the recording of the album Seven Up with Ash Ra Tempel and Timothy Leary. Guitarist Helmut Binzer, who came from the south of Germany, and singer Ute Kannenberg, at that time better known as Tanja Berg in German hit parades ("Na Na Hey Hey Goodbye" - German version), completed the band soon after.

History

For almost a year the band worked hard in their rehearsal room at the "Wrangel Kaserne", former prussian barracks that were transformed into numerous rehearsal rooms in West-Berlin’s Kreuzberg district, composing and arranging the tracks for their first and, as it turned out, only album.

They signed a contract with the german record company Ariola (BMG), and in winter 1973/74 they started recording in Munich’s “Studio 70“, which had been pointed out to them by their friends and colleagues Agitation Free. They were supported by a small but brilliant classical ensemble, directed by Hartmut Westphal, well known german arranger and brother of the band’s bassplayer Michael.

Radiation

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes:

Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles. Ionizing radiation carries more than 10 eV, which is enough to ionize atoms and molecules, and break chemical bonds. This is an important distinction due to the large difference in harmfulness to living organisms. A common source of ionizing radiation is radioactive materials that emit α, β, or γ radiation, consisting of helium nuclei, electrons or positrons, and photons, respectively. Other sources include X-rays from medical radiography examinations and muons, mesons, positrons, neutrons and other particles that constitute the secondary cosmic rays that are produced after primary cosmic rays interact with Earth's atmosphere.

Radiation (disambiguation)

Radiation is a process in which a body emits energy that propagates through a medium, or through empty space, to be absorbed by other bodies. Radiation may also refer to:

Physics

Ionizing radiation

Ionizing (or ionising in British English) radiation is radiation that carries enough energy to free electrons from atoms or molecules, thereby ionizing them. Ionizing radiation is made up of energetic subatomic particles, ions or atoms moving at high speeds (usually greater than 1% of the speed of light), and electromagnetic waves on the high-energy end of the electromagnetic spectrum.

Gamma rays, X-rays, and the higher ultraviolet part of the electromagnetic spectrum are ionizing, whereas the lower ultraviolet part of the electromagnetic spectrum, and also the lower part of the spectrum below UV, including visible light (including nearly all types of laser light), infrared, microwaves, and radio waves are all considered non-ionizing radiation. The boundary between ionizing and non-ionizing electromagnetic radiation that occurs in the ultraviolet is not sharply defined, since different molecules and atoms ionize at different energies. Conventional definition places the boundary at a photon energy between 10 eV and 33 eV in the ultraviolet (see definition boundary section below).