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Lock (water Transport)
A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls. Locks are used to make a river more easily navigable, or to allow a canal to cross land that is not level. Later canals used more and larger locks to allow a more direct route to be taken. Pound lock A ''pound lock'' is most commonly used on canals and rivers today. A pound lock has a chamber with gates at both ends that control the level of water in the pound. In contrast, an earlier design with a single gate was known as a flash lock. Pound locks were first used in China during the Song Dynasty (960–1279 AD), having been pioneered by the Song politician and naval en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock And Cottage On Aylesbury Arm Of Grand Union - Geograph
Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock'' (film), a 2016 Punjabi film * Lock (''Saga of the Skolian Empire''), a sentient machine in the novels by Catherine Asaro * Lock (waltz), a dance figure * ''Locked'' (miniseries), Indian web miniseries * ''The Lock'' (Constable), an 1824 painting by John Constable * ''The Lock'' (Fragonard) or ''The Bolt'', a 1777 painting by Jean-Honoré Fragonard * ''Locks'' (album), by Garnet Crow, 2008 People *Lock (surname) *Ormer Locklear (1891–1920), American stunt pilot and film actor nicknamed "Lock" * George Locks (1889–1965), English cricketer *Lock Martin (1916–1959), stage name of American actor Joseph Lockard Martin, Jr. Places *Lock, Ohio, an unincorporated community in the United States *Lock, South Australia, a small town in the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flash Lock
A flash lock is a type of lock for river or canal transport. Early locks were designed with a single gate, known as a flash lock or staunch lock. The earliest European references to what were clearly flash locks were in Roman times. Development In England the "gate" was similar to a temporary needle dam: a set of boards, called ''paddles'', supported against the current by upright timbers called ''rymers'' which normally kept the level of water above it to navigable levels. Boats moving downstream would wait above the lock until the paddles (and their rymers) were removed, which would allow a "flash" of water to pass through, carrying the boats with it. Upstream boats would be winched or towed through the lock with the paddles removed. Considerable skill was involved both in removing the paddles in a timely manner and navigating the boat through the lock. Flash locks of this type have been documented since at least 1295 C.E. Flash locks were commonly built into small dams or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruges
Bruges ( , nl, Brugge ) is the capital and largest City status in Belgium, city of the Provinces of Belgium, province of West Flanders in the Flemish Region of Belgium, in the northwest of the country, and the sixth-largest city of the country by population. The area of the whole city amounts to more than 13,840 hectares (138.4 km2; 53.44 sq miles), including 1,075 hectares off the coast, at Zeebrugge (from , meaning 'Bruges by the Sea'). The historic city centre is a prominent World Heritage Site of UNESCO. It is oval in shape and about 430 hectares in size. The city's total population is 117,073 (1 January 2008),Statistics Belgium; ''Population de droit par commune au 1 janvier 2008'' (excel-file) Population of all municipalities in Belgium, as of 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damme
Damme () is a city and municipality located in the Belgian province of West Flanders, six kilometres northeast of Brugge (Bruges). The municipality comprises the city of Damme proper and the villages of Hoeke, Lapscheure, Moerkerke, Oostkerke, Sijsele, , and . On 1 January 2006, the municipality had a population of 10,899. The total area is 89.52 km2, giving a population density of 122 inhabitants per km2. In the 13th century, Damme was the port for Bruges, to which it was linked by the river Reie. The river has now been canalised into the long, straight, treelined and picturesque Damse Vaart, which continues across the Dutch border to Sluis. The line of the town's star-shaped fortifications can still be traced by lines of tall poplar trees and in places by a moat. It was the site of the Battle of Damme, fought on 30 and 31 May 1213, when an English fleet under the Earl of Salisbury captured scores of French ships and their cargo of gold, silver, wine and other victuals. We ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basin (maritime)
A dock (from Dutch ''dok'') is the area of water between or next to one or a group of human-made structures that are involved in the handling of boats or ships (usually on or near a shore) or such structures themselves. The exact meaning varies among different variants of the English language. "Dock" may also refer to a dockyard (also known as a shipyard) where the loading, unloading, building, or repairing of ships occurs. History The earliest known docks were those discovered in Wadi al-Jarf, an ancient Egyptian harbor, of Pharaoh Khufu, dating from c.2500 BC located on the Red Sea coast. Archaeologists also discovered anchors and storage jars near the site. A dock from Lothal in India dates from 2400 BC and was located away from the main current to avoid deposition of silt. Modern oceanographers have observed that the ancient Harappans must have possessed great knowledge relating to tides in order to build such a dock on the ever-shifting course of the Sabarmati, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vreeswijk
Vreeswijk is a former village and municipality in the Dutch province of Utrecht. The municipality merged with Jutphaas in 1971, and is now the southern half of the town of Nieuwegein. The former village was located on the Lek River, near where it is crossed by the Merwede Canal. Name The name Vreeswijk is documented in an 11th-century text as ''Fresionovvic'' ('Fresion wic'). Other medieval spellings are ''Vresewijk'', ''Vresewike'', ''Vrieswijc'', and ''Vreeswijck''. The place name is combination of ''Fresia'' meaning ' Frisian' and ''wic'' meaning 'farmstead or settlement', thus settlement of Frisians. History The old village centre on the locks has been preserved reasonably well. This lock is said to be the oldest example of a pound lock in Europe. This was the key innovation which gave rise to the modern canal, by virtue of having two gates, although it was a larger basin capable of holding a number of ships at once. The Lek River was normally at a slightly higher leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Canal (China)
The Grand Canal, known to the Chinese as the Jing–Hang Grand Canal (, or more commonly, as the「大运河」("Grand Canal")), a UNESCO World Heritage Site, is the longest canal or artificial river in the world. Starting in Beijing, it passes through Tianjin and the provinces of Hebei, Shandong, Jiangsu, and Zhejiang to the city of Hangzhou, linking the Yellow River and Yangtze River. The oldest parts of the canal date back to the 5th century BC, but the various sections were first connected during the Sui dynasty (581–618 AD). Dynasties in 1271–1633 significantly restored and rebuilt the canal and altered its route to supply their capital. The Grand Canal played a major role in reunifying north and south China. The canal was built by conscripted laborers and connected the Yellow River in the north with the Yangtze River in the south, which made it much easier to transport grain from the south to the centers of political and military power in north China. The total length ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twenty-Four Histories
The ''Twenty-Four Histories'' (), also known as the ''Orthodox Histories'' (), are the Chinese official dynastic histories covering from the earliest dynasty in 3000 BC to the Ming dynasty in the 17th century. The Han dynasty official Sima Qian established many of the conventions of the genre, but the form was not fixed until much later. Starting with the Tang dynasty, each dynasty established an official office to write the history of its predecessor using official court records, partly in order to establish its own link to the earliest times. As fixed and edited in the Qing dynasty, the whole set contains 3,213 volumes and about 40 million words. It is considered one of the most important sources on Chinese history and culture. The title "Twenty-Four Histories" dates from 1775, which was the 40th year in the reign of the Qianlong Emperor. This was when the last volume, the ''History of Ming'', was reworked and a complete set of the histories was produced. Collection Inherit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dream Pool Essays
''The Dream Pool Essays'' (or ''Dream Torrent Essays'') was an extensive book written by the Chinese polymath and statesman Shen Kuo (1031–1095), published in 1088 during the Song dynasty (960–1279) of China. Shen compiled this encyclopedic work while living in forced retirement from government office, naming the book after his private estate near modern Zhenjiang, Jiangsu province. The ''Dream Pool Essays'' was heavily reorganized in reprint editions by later Chinese authors from the late 11th to 17th centuries. In modern times it has been translated from Chinese into several languages. These include English, German, French, and Japanese translations. The ''Dream Pool Essays'' covers a range of topics including discoveries and advancements in Traditional Chinese medicine, mathematics, astronomy, science and technology, optics, architecture and civil engineering, metallurgy, and early archaeology. Observations of the natural world included those of wildlife, meteorolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shen Kuo
Shen Kuo (; 1031–1095) or Shen Gua, courtesy name Cunzhong (存中) and pseudonym Mengqi (now usually given as Mengxi) Weng (夢溪翁),Yao (2003), 544. was a Chinese polymathic scientist and statesman of the Song dynasty (960–1279). Shen was a master in many fields of study including mathematics, optics, and horology. In his career as a civil servant, he became a finance minister, governmental state inspector, head official for the Bureau of Astronomy in the Song court, Assistant Minister of Imperial Hospitality, and also served as an academic chancellor.Needham (1986), Volume 4, Part 2, 33. At court his political allegiance was to the Reformist faction known as the New Policies Group, headed by Chancellor Wang Anshi (1021–1085). In his ''Dream Pool Essays'' or ''Dream Torrent Essays'' (; ''Mengxi Bitan'') of 1088, Shen was the first to describe the magnetic needle compass, which would be used for navigation (first described in Europe by Alexander Neckam in 1187).Bowma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymath
A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific problems. In Western Europe, the first work to use the term polymathy in its title () was published in 1603 by Johann von Wowern, a Hamburg philosopher. Von Wowern defined polymathy as "knowledge of various matters, drawn from all kinds of studies ... ranging freely through all the fields of the disciplines, as far as the human mind, with unwearied industry, is able to pursue them". Von Wowern lists erudition, literature, philology, philomathy, and polyhistory as synonyms. The earliest recorded use of the term in the English language is from 1624, in the second edition of ''The Anatomy of Melancholy'' by Robert Burton; the form ''polymathist'' is slightly older, first appearing in the ''Diatribae upon the first part of the late History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slipway
A slipway, also known as boat ramp or launch or boat deployer, is a ramp on the shore by which ships or boats can be moved to and from the water. They are used for building and repairing ships and boats, and for launching and retrieving small boats on trailers towed by automobiles and flying boats on their undercarriage. The nautical terms ways and skids are alternative names for slipway. A ship undergoing construction in a shipyard is said to be ''on the ways''. If a ship is scrapped there, she is said to be ''broken up in the ways''. As the word "slip" implies, the ships or boats are moved over the ramp, by way of crane or fork lift. Prior to the move the vessel's hull is coated with grease, which then allows the ship or boat to "slip" off of the ramp and progress safely into the water. Slipways are used to launch (newly built) large ships, but can only dry-dock or repair smaller ships. Pulling large ships against the greased ramp would require too much force. Therefor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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