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L1 8
L1, L01, L.1, L 1 or L-1 may refer to: Mathematics, science and technology Math *L1 distance in mathematics, used in taxicab geometry * L1, the Lp space, space of Lebesgue integrable functions * ℓ1, the ℓp space, space of absolutely convergent sequences *Lasso (statistics), a means of regression analysis used in statistics and machine learning Science *L1 family, a protein family of cell adhesion molecules *L1 (protein), a cell adhesion molecule *L1 or LINE1; transposable elements in the DNA *, Lagrangian point 1, the most intuitive position for an object to be gravitationally stationary relative to two larger objects (such as a satellite with respect to the Earth and Moon) *Anthranilic acid, also called vitamin L1 *The first lumbar vertebrae, lumbar vertebra of the vertebral column in human anatomy * The first larval stage in the ''Caenorhabditis elegans'' worm development Technology *L1, one of the frequencies used by GPS systems (see GPS#Satellite_frequencies, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxicab Geometry
Taxicab geometry or Manhattan geometry is geometry where the familiar Euclidean distance is ignored, and the distance between two points is instead defined to be the sum of the absolute differences of their respective Cartesian coordinates, a distance function (or metric) called the ''taxicab distance'', ''Manhattan distance'', or ''city block distance''. The name refers to the island of Manhattan, or generically any planned city with a rectangular grid of streets, in which a taxicab can only travel along grid directions. In taxicab geometry, the distance between any two points equals the length of their shortest grid path. This different definition of distance also leads to a different definition of the length of a curve, for which a line segment between any two points has the same length as a grid path between those points rather than its Euclidean length. The taxicab distance is also sometimes known as ''rectilinear distance'' or distance (see ''Lp'' space). This geometry ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lufthansa Systems
Lufthansa Systems GmbH & Co. KG is an information technology service provider for the aviation industry owned by the Lufthansa Group. It has around 2,800 employees in several locations in Germany and offices in 16 other countries. The company is headquartered in Raunheim near Frankfurt. The company's portfolio includes "consulting, development and implementation of customized industry solutions as well as the operation of applications in the company's own data centers." The Hungarian subsidiary, Lufthansa Systems Hungária Kft., was established in 1995, and employed 200 people as of 2005. History In 2013, Lufthansa Systems AG, with around 2,700 employees worldwide, achieved annual sales of 640 million euros, of which 265 million euros came from outside the Lufthansa Group. In March 2015, Lufthansa Systems undertook a reorganization to reform into three operating units: Infrastructure, Airline Solutions (now known as "Lufthansa Systems") and Industry Solutions (now "Lufthansa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Railroad Class L1s
Pennsylvania Railroad Class L1s were 2-8-2 steam locomotives, similar to the later USRA Heavy Mikados, that were used on the Pennsylvania Railroad during the early twentieth century. These 574 locomotives were manufactured between 1914 and 1919 by the railroad's own Juniata Shops (344 examples) as well as the Baldwin Locomotive Works (205) and the Lima Locomotive Works (25). It was the largest class of 2-8-2 locomotives anywhere, although other railroads had more Mikados in total. History and notable features The L1s shared the boiler and many other components with the K4s 4-6-2 "Pacific" type, giving a total of 425 locomotives with many standard parts. Although the L1s type was quite successful, it was very much eclipsed in PRR service by the larger and more powerful I1s/I1sa 2-10-0 "Decapods", which arrived in service only two years after the L1s and were very suited to the PRR's mountain grades and heavy coal and mineral trains, and by the 1923 introduction of the M1 4-8 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Counties Committee
The Northern Counties Committee (NCC) was a railway that served the north-east of Ireland. It was built to Irish gauge () but later acquired a number of narrow gauge lines. It had its origins in the Belfast and Ballymena Railway which opened to traffic on 11 April 1848. The NCC itself was formed on 1 July 1903 as the result of the Midland Railway of England taking over the Belfast and Northern Counties Railway (BNCR), which the Belfast and Ballymena Railway had become. At the Railways Act 1921, 1923 Grouping of British railway companies, the Committee became part of the London, Midland and Scottish Railway (LMS). After the Transport Act 1947, nationalisation of Britain's railways in 1948 the NCC was briefly part of the British Transport Commission, which sold it to the Ulster Transport Authority (UTA) in 1949. The BNCR and its successors recognised the potential value of tourism and were influential in its development throughout Northern Ireland. They were able to develop and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LNER Thompson Class L1
The London and North Eastern Railway (LNER) Thompson Class L1 was a class of 2-6-4T steam locomotives designed by Edward Thompson. The prototype no. 9000 was built in 1945, but the remaining 99 were built under British Railways jurisdiction between 1948 and 1950. The prototype was well received, however the production batch were not, and all were withdrawn and scrapped between 1960 and 1962. Background The class was designed to address the lack of modern tank engines on the Central and Eastern sections of the LNER, replacing the six Metropolitan Railway K Class and to serve alongside the eighty Gresley V1/V3 tank engines. Under Edward Thompson, who sought to standardise on the large number of locomotives of the LNER, the L1 was designed to be able to carry out both passenger and goods work. Design Similar to other Thompson designs, the design reused many standard components. The cylinders were the same as the B1, with a boiler based on the V3 design uprated to 225 psi. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GNR Class L1
The Great Northern Railway (GNR) Class L1 (LNER Class R1) was a 0-8-2T side tank steam locomotive designed by Henry Ivatt. It was originally designed for suburban passenger traffic on the Metropolitan City Lines. A prototype was built in 1903, but it was overweight, so it was rebuilt with a smaller boiler and shorter side tanks. Ten more engines were then built to this modified design. During the "small boiler" era, the cylinders were lined to 18" to match the boilers. In 1905 and 1906, thirty more engines were built for working goods trains in the West Riding of Yorkshire. The original eleven engines were not a great success on passenger services so, in 1907, they were moved to the West Riding for goods work. Condensing apparatus The first eleven locomotives were fitted with condensing apparatus for working in tunnels. The thirty built for the West Riding were probably not so fitted, but this is subject to confirmation. It is not known whether the condensing apparatus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GCR Class 1B
The GCR Class 1B was a class of locomotives on the Great Central Railway. They were notable as the first locomotives of the 2-6-4T (or ''Adriatic'') wheel arrangement to be used by a British standard-gauge railway; there had been two narrow-gauge examples on the Leek & Manifold Valley Light Railway since 1904. History In 1906, the Great Central Railway (GCR) had inherited nine locomotives from the Lancashire, Derbyshire and East Coast Railway (LD&EC), of Class D (LNER class M1). These had been designed to the specifications of Robert A. Thom, the locomotive superintendent of the LD&EC, for hauling coal trains from northern Derbyshire and Nottinghamshire to the docks at Grimsby. They were built by Kitson & Co in 1904 and 1906, and performed well. When further locomotives were required for similar duties, opportunity was taken to produce an updated design. The 1B class locomotives were designed by the GCR's locomotive superintendent John G. Robinson, with assistance from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erie L-1
The three L-1 Mallet steam locomotives of the Erie Railroad, built in July 1907 by ALCO, and numbered 2600, 2601 and 2602 (ALCo construction numbers 42269, 42270 and 42271 respectively); were unique in that they were the only articulated camelback locomotives ever built as well as being the first 0-8-8-0 type locomotives ever built. When built in 1907, they were the largest steam locomotives in the world, weighing . The L-1 Class was also called the "Angus" Type in homage to Angus Sinclair (which the 0-8-8-0 type is named), who was the publisher of Railway & Locomotive Engineering, a leading trade journal. A rarely seen photograph of #2602 shows his name under the windows on the cab sides. The use of an intercepting valve allowed the locomotive to be used in simple or single expansion steam capacity. This meant that if desired, high pressure steam could be supplied to the front and rear cylinder groups for additional power at the cost of exhausting the boiler of steam pressure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Léman Express
The Léman Express is a commuter rail network for the transborder agglomeration of Grand Genève (''Greater Geneva'') in west Switzerland and the French Alps (Haute-Savoie and Ain). Six lines serve Swiss and French towns along 230 km of railway. At the heart of the Léman Express system is the CEVA (Cornavin‒Eaux-Vives‒Annemasse) rail project linking Eaux-Vives station with Cornavin station in Geneva. This line, largely underground, was opened on 15 December 2019. The Léman Express marked the start of direct services from Genève-Cornavin station to the French cities of Évian, Thonon, Annemasse and Annecy as well as the population of the Arve Valley up to Saint-Gervais-les-Bains. Lines The Léman Express operates daily from 5:00 a.m. to 12:30 a.m. and hourly overnight on RL4 and RL5! Ridership Upon the full launch of the network in December 2019, it was hoped ridership would be around 50,000 travellers per day by the end of the next year; at the beginning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
