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Dredgers
Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger. Usually the main objectives of dredging is to recover material of value, or to create a greater depth of water. Dredging systems can either be shore-based, brought to a location based on barges, or built into purpose-built vessels. Dredging can have environmental impacts: it can disturb marine sediments, creating dredge plumes which can lead to both short- and long-term water pollution, damage or destroy seabed ecosystems, and release legacy human-sourced toxins captured in the sediment. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dredge (PSF)
Dredging is the Digging, excavation of material from a water environment. Possible reasons for dredging include improving existing Water feature, water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, Levee, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating heavy machinery, plant, known as a dredger. Usually the main objectives of dredging is to recover material of value, or to create a greater depth of water. Dredging systems can either be shore-based, brought to a location based on Barge, barges, or built into purpose-built vessels. Dredging can have environmental impacts: it can disturb Marine sediment, marine sediments, creating Dredge plume, dredge plumes which can lead to both short- and long-term water pollution, damage or destroy Marine ec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Dredging
Ocean dredging was an oceanography technique introduced in the nineteenth century and developed by naturalist Edward Forbes. This form of dredging removes substrate and fauna specifically from the Marine ecosystem, marine environment. Ocean dredging techniques were used on the HMS Challenger (1858), HMS Challenger expeditions as a way to sample marine sediment and organisms. History Edward Forbes Edward Forbes would lay out the dredged material on the deck to examine, preserve and study it. The practice was chronicled in a remembrance of Forbes by William Jerdan in his 1866 book ''Men I Have Known''. HMS ''Challenger'' Ocean dredging was a common sampling technique used on the Challenger expedition. The expedition, led by oceanographer John Murray (oceanographer), John Murray and chief scientist Charles Wyville Thomson, set sail in 1872 and returned to England in 1876. The ship was equipped with 34 dredges and 20 dredge nets, completing 133 dredges at 111 stations during the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Erosion
Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of Wind wave, waves, Ocean current, currents, tides, wind-driven water, waterborne ice, or other impacts of storms. The landward retreat of the shoreline can be measured and described over a temporal scale of tides, seasons, and other short-term cyclic processes. Coastal erosion may be caused by hydraulic action, abrasion (geology), abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural. On non-rocky coasts, coastal erosion results in rock formations in areas where the coastline contains rock layers or fracture zones with varying resistance to erosion. Softer areas become eroded much faster than harder ones, which typically result in landforms such as tunnels, bridges, columns, and Column, pillars. Over time the coast generally evens out. The softer areas fill up with sediment eroded from hard areas, and roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draga Cavafango Leonardo - Museo Scienza E Tecnologia Milano
Draga may refer to: People * Draga (surname) * Draga (given name) Geography In Croatia: * Mošćenička Draga, a village and a municipality in Primorje-Gorski Kotar County * Draga, Požega-Slavonia County, a village near Velika, Croatia * Draga, Rijeka, an area of the city of Rijeka Rijeka (; Fiume ( fjuːme in Italian and in Fiuman dialect, Fiuman Venetian) is the principal seaport and the List of cities and towns in Croatia, third-largest city in Croatia. It is located in Primorje-Gorski Kotar County on Kvarner Ba ..., Primorje-Gorski Kotar County * Senjska Draga, a village near Senj In Romania: * Valea Dragă River, Romania * Draga, a village in Silivașu de Câmpie Commune, Bistriţa-Năsăud County, Romania In Serbia: * Draga (Tutin), a village in the Municipality of Sandzak In Slovenia: * Draga, Ig, a settlement in the Municipality of Ig * Draga, Loški Potok, a settlement in the Municipality of Loški Potok * Draga, Nova Gorica, a settlement in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Canal
The Panama Canal () is an artificial waterway in Panama that connects the Caribbean Sea with the Pacific Ocean. It cuts across the narrowest point of the Isthmus of Panama, and is a Channel (geography), conduit for maritime trade between the Atlantic and Pacific Oceans. Lock (water navigation), Locks at each end lift ships up to Gatun Lake, an artificial fresh water lake Above mean sea level, above sea level, created by damming the Chagres River and Lake Alajuela to reduce the amount of excavation work required for the canal. Locks then lower the ships at the other end. An average of of fresh water is used in a single passing of a ship. The canal is threatened by low water levels during droughts. The Panama Canal shortcut greatly reduces the time for ships to travel between the Atlantic and Pacific oceans, enabling them to avoid the lengthy, hazardous route around the southernmost tip of South America via the Drake Passage, the Strait of Magellan or the Beagle Channel. Its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suez Canal Company
Suez (, , , ) is a seaport city with a population of about 800,000 in north-eastern Egypt, located on the north coast of the Gulf of Suez on the Red Sea, near the southern terminus of the Suez Canal. It is the capital and largest city of the Suez Governorate. It has three ports: the Suez Port (Port Tewfik), al-Adabiya, and al-Zaytiya, and extensive port facilities. Together, the three cities form the Suez metropolitan area, located mostly in Africa with a small portion in Asia. Railway lines and highways connect the city with Cairo, Port Said, and Ismailia. Suez has a petrochemical plant, and its oil refineries have pipelines carrying the finished product to Cairo. These are represented in the flag of the governorate: the blue background refers to the sea, the gear refers to Suez's status as an industrial governorate, and the flame refers to the petroleum firms of Suez. The modern city of Suez is a successor of the ancient city of Clysma, a major Red Sea port and a center ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonardo Da Vinci
Leonardo di ser Piero da Vinci (15 April 1452 - 2 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he has also become known for #Journals and notes, his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and palaeontology. Leonardo is widely regarded to have been a genius who epitomised the Renaissance humanism, Renaissance humanist ideal, and his List of works by Leonardo da Vinci, collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary Michelangelo. Born out of wedlock to a successful notary and a lower-class woman in, or near, Vinci, Tuscany, Vinci, he was educated in Florence by the Italian painter and sculptor Andrea del Verrocchio. He began his career ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Science+Business Media
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second-largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationally, op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Routledge Hill
Donald Routledge Hill (6 August 1922 – 30 May 1994)D. A. King, “In Memoriam: Donald Routledge Hill (1922-1994)”, ''Arabic Sciences and Philosophy,'' Volume 5 / Issue 02 / September 1995, pp 297-302 was a British engineer and historian of science and technology best known for his translation of ''The Book of Knowledge of Ingenious Mechanical Devices'' of the Muslim engineer Ismail al-Jazari.Hill Donald(1993) Life and work Born in London, after secondary school Hill served in the British army, in the Royal Engineers from 1941 to 1946. Two years he served in the Eighth Army in North Africa until he was wounded in action in Italy. Back in England he studied Engineering at the London University, obtaining his engineering degree in 1949. In 1964 he obtained his M.Litt in Islamic History at the University of Durham, and in 1970 his PhD from the University of London. Late 1940s Hill started his career working for the Iraq Petroleum Company in Lebanon, Syria and Qatar. Back in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banu Musa
Banu or BANU may refer to: * Banu (name) * Banu (Arabic), Arabic word for "the sons of" or "children of" * Banu (makeup artist), an Indian makeup artist * Banu Chichek, a character in the ''Book of Dede Korkut'' * Bulgarian Agrarian National Union, a political party Places * Banu, Iran (other), various places in Iran * Bannu or Banū City, in Khyber-Pakhtunkhwa, Pakistan * Banu, a village in the commune of Dumești, Iași, Romania * Banú Bannow () is a village and civil parish lying east of Bannow Bay on the southwest coast of County Wexford, Ireland. In modern times the main settlement is the village of Carrig-on-Bannow (or ''Carrig''). In Norman times there was a borough ..., a village in County Wexford, Ireland See also * * Bano (other) * Bangu (other) * Banhu, Chinese musical instrument * Bannu (other) * Banou, Burkina Faso * Bhanu (other) * Bianhu * Bonu (other) {{dab, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Book Of Ingenious Devices
The ''Book of Ingenious Devices'' (, ) is a large illustrated work on mechanical devices, including automata, published in 850 by the three brothers of Persian descent, the Banū Mūsā brothers (Ahmad, Muhammad and Hasan ibn Musa ibn Shakir) working at the House of Wisdom (''Bayt al-Hikma'') in Baghdad, Iraq, under the Abbasid Caliphate. The book described about one hundred devices and how to use them. Overview The book was commissioned by the Abbasid Caliph of Baghdad, Al-Ma'mun (786–833), who instructed the Banū Mūsā brothers to acquire all of the Hellenistic texts that had been preserved by monasteries and by scholars during the decline and fall of Roman civilization. The Banū Mūsā brothers invented a number of automata (automatic machines) and mechanical devices, and they described a hundred such devices in their ''Book of Ingenious Devices''. Some of the devices described in the ''Book of Ingenious Devices'' were inspired by the works of Hero of Alexandria a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banū Mūsā Brothers
The three brothers Abū Jaʿfar, Muḥammad ibn Mūsā ibn Shākir (before 803 – February 873); Abū al-Qāsim, Aḥmad ibn Mūsā ibn Shākir (d. 9th century) and Al-Ḥasan ibn Mūsā ibn Shākir (d. 9th century), were Persian people, Persian scholars who lived and worked in Baghdad. They are collectively known as the Banū Mūsā (, "Sons of (or Moses)"). The Banū Mūsā were the sons of Mūsā ibn Shākir, who was a well-known astronomer of al-Ma'mun, a son of the Abbasid caliph Harun al-Rashid. After their father's death, the brothers received an education under al-Ma'mun’s direction, and were enrolled at the House of Wisdom in Baghdad. There they undertook the translation of ancient Greek works acquired from Byzantium, which they used to develop their own technological, mathematical and astronomical ideas. They were some of the earliest scholars to adopt Greek mathematics, but innovative in their approach to the concepts of area and circumference by expressing them ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
