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In mathematics, particularly topology, an atlas is a concept used to describe a manifold. An atlas consists of individual charts that, roughly speaking, describe individual regions of the manifold. In general, the notion of atlas underlies the formal definition of a manifold and related structures such as vector bundles and other fiber bundles .
RailTopoModel is a systemic data model for describing the topology-based railway infrastructure as needed by various applications. The RailTopoModel has been initially developed under patronage of the International Union of Railways (UIC) and was released as International Railway Standard (IRS) 30100 in April 2016. [1]
In the early 1990s, the Atlas Tool Co. changed its name to Atlas Model Railroad Company, Inc. In 1997 Atlas O, LLC was established as a separate business entity dedicated to producing multiple lines of O scale model railroad products including track, freight cars, locomotives and accessories, co-founded and led by James J. Weaver.
A model railway club in Bangor is helping more autistic young people get involved in the hobby.
In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot. The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2 -inch gauge railway modelling with both electric and live steam operation.
A railway modelling club in Calais. The Tech Model Railroad Club (TMRC) at MIT in the 1950s pioneered automatic control of track-switching by using telephone relays. The oldest society is 'The Model Railway Club' [5] (established 1910), near Kings Cross, London, UK. As well as building model railways, it has 5,000 books and periodicals.
A view of the HO scale model of the Green Building at the Tech Model Railroad Club in Cambridge, MA. The Tech Model Railroad Club (TMRC) is a student organization at the Massachusetts Institute of Technology (MIT). [1] Historically, it has been a wellspring of hacker culture and the oldest such hacking group in North America. [2] Formed in 1946 ...
3 ft (914 mm) gauge was the narrow gauge used in Ireland, and the gauge of almost all the railways on the Isle of Man. It was also used on a handful of railways in Britain. However modelling these 3 ft gauge railways is very much a minority pursuit, especially when compared with other prototypes such as the Welsh 2 ft (610 mm) narrow gauge ...