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OGame is a browser-based, money-management and space-war themed massively multiplayer online browser game. OGame was created in 2002 and is produced and maintained by Gameforge . [ 1 ] It is available in multiple languages, and different nationalities have their own communities.
The RXTE observed X-rays from black holes, neutron stars, X-ray pulsars and X-ray bursts. It was funded as part of the Explorer program and was also called Explorer 69 . RXTE had a mass of 3,200 kg (7,100 lb) and was launched from Cape Canaveral on 30 December 1995, at 13:48:00 UTC , on a Delta II launch vehicle .
The flight-time equivalent dose concept is the creation of Ulf Stahmer, a Canadian professional engineer working in the field of radioactive materials transport. It was first presented in the poster session [1] at the 18th International Symposium of the Packaging and Transport of Radioactive Materials (PATRAM) held in Kobe, Hyogo, Japan where the poster received an Aoki Award for distinguished ...
Geiger-Müller counter with dual counts/dose rate display measuring a "point source". The dose per count is known for this specific instrument by calibration. The count rates of cps and cpm are generally accepted and convenient practical rate measurements.
Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle. William Coolidge explains medical imaging and X-rays.. An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays.
Propagation of a ray through a layer. The transfer-matrix method is a method used in optics and acoustics to analyze the propagation of electromagnetic or acoustic waves through a stratified medium; a stack of thin films. [1] [2] This is, for example, relevant for the design of anti-reflective coatings and dielectric mirrors.
The Space Expedition Corporation (SXC) was founded by Harry van Hulten and Lt-Gen (ret.) Ben Droste in 2008. Initially operating under a wet-lease agreement with XCOR Aerospace, it was acquired by XCOR Aerospace in June 2014 and was a fully owned subsidiary. Michiel Mol and Maarten Elshove joined SXC in 2010 and are thus considered founders.
X-ray mirrors can be built, but only if the angle from the plane of reflection is very low (typically 10 arc-minutes to 2 degrees). [2] These are called glancing (or grazing ) incidence mirrors . In 1952, Hans Wolter outlined three ways a telescope could be built using only this kind of mirror.