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Platform Doors
Platform screen doors (PSDs), also known as platform edge doors (PEDs), are used at some train, rapid transit and people mover stations to separate the platform from train tracks, as well as on some bus rapid transit, tram and light rail systems. Primarily used for passenger safety, they are a relatively new addition to many metro systems around the world, some having been retrofitted to established systems. They are widely used in newer Asian and European metro systems, and Latin American bus rapid transit systems. History The idea of platform edge doors dates from as early as 1908, when Charles S. Shute of Boston was granted a patent for "Safety fence and gate for railway-platforms". The invention consisted of "a fence for railway platform edges", composed of a series of pickets bolted to the platform edge, and vertically movable pickets that could retract into a platform edge when there was a train in the station. In 1917, Carl Albert West was granted a patent for "Ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunnel Boring Machine
A tunnel boring machine (TBM), also known as a "mole" or a "worm", is a machine used to excavate tunnels. TBMs are an alternative to drilling and blasting methods and "hand mining", allowing more rapid excavation through hard rock, wet or dry soil, or sand (although each requires specialized TBM technologies). TBM-bored tunnel cross-sections extend up to (through June 2023). TBM tunnels are typically circular in cross-section, but may also be square or rectangular, or U- or horseshoe-shaped. Much narrower tunnels are typically bored using trenchless construction methods or horizontal directional drilling rather than by TBMs. TBMs limit disturbance to the surrounding ground and produce a smooth tunnel wall, which reduces the cost of lining the tunnel; it also allows for tunneling in urban areas. Large TBMs are expensive and challenging to construct and transport, fixed costs which become less significant for longer tunnels. Tunneling speeds generally decline as tunnel size in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piston Effect
Piston effect refers to the forced-air flow inside a tunnel or shaft caused by moving vehicles. It is one of numerous phenomena that engineers and designers must consider when developing a range of structures. Cause In open air, when a vehicle travels along, air pushed aside can move in any direction except into the ground. Inside a tunnel, air is confined by the tunnel walls to move along the tunnel. Behind the moving vehicle, as air has been pushed away, suction is created, and air is pulled to flow into the tunnel. In addition, because of fluid viscosity, the surface of the vehicle drags the air to flow with vehicle, a force experienced as skin drag by the vehicle. This movement of air by the vehicle is analogous to the operation of a mechanical piston as inside a reciprocating compressor gas pump, hence the name "piston effect". The effect is also similar to the pressure fluctuations inside drainage pipes as waste water pushes air in front of it. The piston effect is v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homicide
Homicide is an act in which a person causes the death of another person. A homicide requires only a Volition (psychology), volitional act, or an omission, that causes the death of another, and thus a homicide may result from Accident, accidental, Reckless homicide, reckless, or Negligent homicide, negligent acts even if there is no Intent (law), intent to cause harm. It is separate from suicide. Homicides can be divided into many overlapping legal categories, such as murder, manslaughter, justifiable homicide, assassination, killing in war (either following the laws of war or as a war crime), euthanasia, and capital punishment, depending on the circumstances of the death. These different types of homicides are often treated very differently in human Society, societies; some are considered crimes, while others are permitted or even Court order, ordered by the Law, legal system. Criminality Criminal homicide takes many forms, including accidental killing and murder. Criminal ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suicide
Suicide is the act of intentionally causing one's own death. Risk factors for suicide include mental disorders, physical disorders, and substance abuse. Some suicides are impulsive acts driven by stress (such as from financial or academic difficulties), relationship problems (such as breakups or divorces), or harassment and bullying. Those who have previously attempted suicide are at a higher risk for future attempts. Effective suicide prevention efforts include limiting access to methods of suicide such as firearms, drugs, and poisons; treating mental disorders and substance abuse; careful media reporting about suicide; improving economic conditions; and dialectical behaviour therapy (DBT). Although crisis hotlines, like 988 in North America and 13 11 14 in Australia, are common resources, their effectiveness has not been well studied. Suicide is the 10th leading cause of death worldwide, accounting for approximately 1.5% of total deaths. In a given year, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Door
A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a ''doorway'' or ''portal''. A door's essential and primary purpose is to provide security by controlling access to the doorway (portal). Conventionally, it is a panel that fits into the doorway of a building, room, or vehicle. Doors are generally made of a material suited to the door's task. They are commonly attached by hinges, but can move by other means, such as slides or counterbalancing. The door may be able to move in various ways (at angles away from the doorway/portal, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. In most cases, a door's interior matches its exterior side. But in other cases (e.g., a vehicle door) the two sides are radically different. Many doors incorporate lock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Tracks
Railway track ( and UIC terminology) or railroad track (), also known as permanent way () or "P way" ( and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers (railroad ties in American English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable, low-friction surface on which steel wheels can roll. Early tracks were constructed with wooden or cast-iron rails, and wooden or stone sleepers. Since the 1870s, rails have almost universally been made from steel. Historical development The first railway in Britain was the Wollaton wagonway, built in 1603 between Wollaton and Strelley in Nottinghamshire. It used wooden rails and was the first of about 50 wooden-railed tramways built over the subsequent 164 years. These early wooden tramways typically used rails of oak or beech, attached to wooden sleepers with iron or wooden nails. Gravel or small stones were packe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Platform
A railway platform is an area in a train station alongside a railway Track (rail transport), track providing convenient access to trains. Almost all stations have some form of platform, with larger stations having multiple platforms. Grand Central Terminal in Midtown Manhattan, Midtown Manhattan hosts 44 platforms, more than any other rail station in the world. The world's longest station platform is at Hubballi Junction railway station, Hubballi Junction in India at .Gorakhpur gets world's largest railway platform ''The Times of India'' The Appalachian Trail station or Benson station in the United States, at the other extreme, has a platform which is only long enough for a single bench. Among some American train conductors, the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Daegu (; ), formerly spelled Taegu and officially Daegu Metropolitan City (), is a city in southeastern South Korea. It is the third-largest urban agglomeration in South Korea after Seoul and Busan; the fourth-largest List of provincial-level cities of South Korea, metropolitan city in the nation with over 2.3 million residents; and the second-largest city after Busan in the Yeongnam Regions of Korea, region in southeastern South Korea. Daegu and the surrounding North Gyeongsang Province are often referred to as Daegu-Gyeongbuk, with a total population of over 5 million. Daegu is located in south-eastern Korea about from the coast, near the Geumho River and its mainstream, Nakdong River in Gyeongsang Province. The Daegu basin is the central plain of the Yeongnam List of regions of Korea, region. In ancient times, the Daegu area was part of the proto-kingdom Jinhan. Subsequently, Daegu came under the control of the Silla Kingdom, which unified the Korean Peninsula. During th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HK MTR DisneyResortLine Sunny Bay Platform Trains
Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the world. Hong Kong was established as a colony of the British Empire after the Qing dynasty ceded Hong Kong Island in 1841โ1842 as a consequence of losing the First Opium War. The colony expanded to the Kowloon Peninsula in 1860 and was further extended when the United Kingdom obtained a 99-year lease of the New Territories in 1898. Hong Kong was occupied by Japan from 1941 to 1945 during World War II. The territory was handed over from the United Kingdom to China in 1997. Hong Kong maintains separate governing and economic systems from that of mainland China under the principle of one country, two systems. Originally a sparsely populated area of farming and fishing villages,. the territory is now one of the world's most significant fina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Singapore MRT
The Mass Rapid Transit system, locally known by the initialism MRT, is a rapid transit system in Singapore and the island country's principal mode of railway transportation. After two decades of planning the system commenced operations in November 1987 with an initial stretch consisting of five stations. The network has since grown to span the length and breadth of the country's main island โ with the exception of the forested core and the rural northwestern region โ in accordance with Singapore's aim of developing a comprehensive rail network as the backbone of the country's public transportation system,Singapore's heavy rail network is composed of three distinct systems. Two of the three are rapid transit networks, chiefly a) the MRT system, which falls entirely within the city-state and forms the core of the network, and b) the two-station cross-border Johor BahruโSingapore rapid transit system (RTS), linked to the mainline MRT and due to commence operations in en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lille Metro
The Lille Metro () is a driverless light metro system located in Lille, France. It commenced operations on 25 April 1983 and was the first system to implement the Vรฉhicule Automatique Lรฉger (VAL, ) technology. While sometimes cited as the worldโs first fully automated driverless metro, this distinction in fact belongs to the Port Island Line in Kobe, Japan, which became operational two years earlier. The Lille Metro comprises two lines, serving 60 stations across a network. It constitutes a fundamental component of Lille's integrated public transport system, which also includes the Lille tramway and bus services, all managed under the Ilรฉvia brand. History In the 1960s the decentralisation of the city of Lille was considered; some towns of the Lille region were isolated and were poorly served by existing public transport, while the centre of Lille was congested with traffic and buses. The decentralisation resulted in the creation of the Public Establishment of Li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
