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Automatic train stop or ATS is a system on a train that automatically stops a train if certain situations occur (unresponsive train operator, earthquake, disconnected rail, train running over a stop signal, etc.) to prevent accidents.
Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...
The Mount St John Anti-Aircraft Battery is a good example of the standard HAA gun station complex used throughout Queensland, with four 3.7-inch (94 mm) gun positions (in this case of a surface emplacement type), four magazines (two still buried), a semi-underground command post, a Light Anti-Aircraft (LAA) position and camp site remnants at ...
The Northridge Earthquake was the subject of the 1995 film Epicenter U., a first-hand account of healing from the natural disaster, directed by Alexis Krasilovsky. [71] [72] The Earthquake Haggadah (1995) was a video excerpt from Epicenter U. narrated by Wanda Coleman. Distributed in 3/4" and VHS by the Poetry Film Workshop circa 1998.
Dougong inside the East Hall timber hall of Foguang Temple, built in 857 during the Tang dynasty Dougong brackets on an Eastern Han (25–220 CE) era architectural model of a watchtower A stone-carved relief above a cave entrance of the Yungang Grottoes (Shanxi province) showing an imitation of dougong brackets, Northern Wei dynasty (386–535 CE) Stone pillars made in imitation of wooden ...
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes.With better understanding of seismic demand on structures and with recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged.
Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC is to prevent collisions, organize and expedite the flow of traffic in ...
According to building codes, earthquake-resistant structures are intended to withstand the largest earthquake of a certain probability that is likely to occur at their location. This means the loss of life should be minimized by preventing collapse of the buildings for rare earthquakes while the loss of the functionality should be limited for ...