Question: What is this plant named after?

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Hickory. Hickory is a common name for trees composing the genus Carya, which includes around 18 species. Five or six species are native to China, Indochina, and India (Assam), as many as twelve are native to the United States, four are found in Mexico, and two to four are native to Canada. A number of hickory species are used for products like edible nuts or wood.Hickories are temperate forest trees with pinnately compound leaves and large nuts. Hickory flowers are small, yellow-green catkins produced in spring. They are wind-pollinated and self-incompatible. The fruit is a globose or oval nut, 2 –.

Hickory. name "Carya" is , "káryon", meaning "nut".## Species and classification.The genus "Carya" is in the walnut family, Juglandaceae. In the APG system, this family is included in the order Fagales. Several species are known to hybridize, with around nine accepted, named hybrids. Beaked hickory ("Annamocarya sinensis") is a species formerly classified as "Carya sinensis", but now considered its own genus, "Annamocarya".## Asian hickories.Carya" sect. "Sinocarya"Carya dabieshanensis" – Dabie Shan hickory (may be synonymous with "C. cathayensis")"Carya cathayensis" – Chinese hickory"Carya hunanensis" – Hunan hickory"Carya kweichowensis" – Guizhou hickory"Carya poilanei" – Poilane's hickory"Carya tonkinensis" – Vietnamese hickory## North American hickories.Carya" sect.

Hickory. "Carya – typical hickories"Carya floridana" – scrub hickory"Carya glabra" – pignut hickory, pignut, sweet pignut, coast pignut hickory, smoothbark hickory, swamp hickory, broom hickory"Carya laciniosa" – shellbark hickory, shagbark hickory, bigleaf shagbark hickory, kingnut, big shellbark, bottom shellbark, thick shellbark, western shellbark"Carya myristiciformis" – nutmeg hickory, swamp hickory, bitter water hickory"Carya ovalis" – red hickory, spicebark hickory, sweet pignut hickory (treated as a synonym of "C. glabra" by "Flora N. Amer.")"Carya ovata" – shagbark hickory"C. o." var. "ovata" – northern shagbark hickory"C. o." var. "australis" – southern shagbark hickory, Carolina hickory (syn. "C. carolinae-septentrionalis")"Carya pallida" – sand hickory"Carya texana" –.

Hickory. black hickory"Carya tomentosa" – mockernut hickory (syn. "C. alba")†"Carya washingtonensis" – Miocene of Kittitas County, WashingtonCarya" sect. "Apocarya – pecans"Carya aquatica" – bitter pecan or water hickory"Carya cordiformis" – bitternut hickory"Carya illinoinensis" – pecan"Carya palmeri" – Mexican hickory## Ecology.Hickory is used as a food plant by the larvae of some Lepidoptera species. These include: Luna moth ("Actias luna") Brown-tail moth ("Euproctis chrysorrhoea") "Coleophora" case-bearers, "C. laticornella" and "C. ostryae" Regal moths ("Citheronia regalis"), whose caterpillars are known as hickory horn-devils Walnut sphinx ("Amorpha juglandis") The bride (nominate subspecies "Catocala neogama neogama") Hickory tussock moth ("Lophocampa caryae")The hickory leaf stem gall.

Hickory. also found feeding on galls of the hickory leaf stem gall phylloxera.The banded hickory borer ("Knulliana cincta") is also found on hickories.## Evolutionary history.The oldest fossils attributed to "Carya" are Cretaceous pollen grains from Mexico and New Mexico. Fossil and molecular data suggest the genus "Carya" may have diversified during the Miocene. Modern "Carya" first appear in Oligocene strata 34 million years ago. Recent discoveries of "Carya" fruit fossils further support the hypothesis that the genus has long been a member of Eastern North American landscapes, however its range has contracted and Carya is no longer extant west of the.

Hickory. Rocky Mountains.Fossils of early hickory nuts show simpler, thinner shells than modern species with the exception of pecans, suggesting that the trees gradually developed defenses to rodent seed predation. During this time, the genus had a distribution across the Northern Hemisphere, but the Pleistocene Ice Age beginning 2 million years ago obliterated it from Europe. The distribution of Carya in North America also contracted and it completely disappeared from the continent west of the Rocky Mountains. Since fossil records show North America as having the largest number of Juglandaceae species, it is likely that the genus originated there and later.

Hickory. spread to Europe and Asia.## Fruit.Some fruits are borderline and difficult to categorize. Hickory nuts ("Carya") and walnuts ("Juglans") in the Juglandaceae family grow within an outer husk; these fruits are sometimes considered to be drupes or drupaceous nuts, rather than true botanical nuts. "Tryma" is a specialized term for such nut-like drupes.## Nutrition.Dried hickory nuts are 3% water, 18% carbohydrates, 13% protein, and 64% fats (table). In a 100 gram (3.5 oz) reference amount, dried hickory nuts supply 657 calories, and are a rich source (20% or more of the Daily Value, DV) of several B vitamins and dietary.

Hickory. regarded by some as the finest nut trees. Pecans are the most important nut tree native to North America.When cultivated for their nuts, clonal (grafted) trees of the same cultivar cannot pollinate each other because of their self-incompatibility. Two or more cultivars must be planted together for successful pollination. Seedlings (grown from hickory nuts) will usually have sufficient genetic variation. Hican WalnutPhilips, Roger. "Trees of North America and Europe". Random House, Inc., New York. , 1979. "Carya" images at the Arnold Arboretum of Harvard University Plant Image Database Damery, Jonathan. "The "Carya" Collection." "Arnold Arboretum of Harvard University website." Accessed.


Question: What is the length in kilometre is the mountain in the image?

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Salève. Salève, a cable car, since 1932 (rebuilt in 1983). The Salève stretches between Étrembières in the north and the suspension bridge of La Caille in the south. Between 1892 and 1935, the Salève was served by the first electric rack railway in the world (Chemin de fer du Salève).The eastern side of the Salève dives under the molasse of the Bornes Massif while the abrupt mountain slope facing Geneva is subject to erosion. The vegetation – or the absence thereof – enhances the limestone's layers. This side of the mountain is slit by several narrow and deep gorges, among which.

Salève. the Grande Varappe, which at the end of the 19th century gave its name to the activity of rock climbing in French. This discipline developed intensely there, at a time when it was only beginning.The Monnetier Valley, separating the Petit and Grand Salève, is due to glaciary erosion. Modern geologists now think that this valley was dug by the subglaciary currents in a fissured region between the Petit and Grand Salève and not by the Arve as was assumed earlier.## From prehistory to green tourism.Between 12,000 and 10,000 BC, the Salève hosted a magdalenian site. From 1833, Genevan physician François.

Salève. proposed by Lamartine in 1825 as the conclusion of his friend Lord Byron's uncompleted poem, is located on the Salève. Byron died in 1824. (See the French page for the complete "Dedicace"). "Le Ruisseau" is a poem by Théophile Gautier located on the foot of the Salève (1869). (See the French page for the complete poem).## The Salève in paintings.The Salève occurs on one of the first European paintings depicting a realistic landscape, "La Pêche Miraculeuse" by Konrad Witz created in 1444.Cable carHike club starting 10am on Sundays mornings from Veyrier-DouaneSaleve Airlines, school of paraglidingShedrub Choekhor Ling site.


Question: Which (geo)physical feature is the place located in or on?

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Hanauma Bay. Hanauma (; )is a marine embayment formed within a tuff ring and located along the southeast coast of the Island of Oahu in the Hawaii Kai neighborhood of East Honolulu, in the Hawaiian Islands.Hanauma is one of the most popular tourist destinations on the Island and has suffered somewhat from overtourism. At one time, this popular tourist destination accommodated over three million visitors per year. In 1956, dynamite was used to clear portions of the reef to make room for telephone cables linking Hawaii to the west coast of the US.## Name.The prefix "hana" means bay in the Hawaiian language.

Hanauma Bay. of time. Volcanic chains such as the Hawaiian Islands form as a result of the movement of a tectonic plate across fixed hot spot beneath the surface. In the case of the Hawaiian Islands, the Pacific plate has moved slowly northwestward over such a hotspot.Approximately 3.9 million years ago, the Waianae volcano created the island of Oahu. About 2.5 million years ago, the Koolau volcano breached the ocean's surface and continued to grow in elevation until about 1.7 million years ago, when it went dormant. Most of the eastern or windward portion of Oahu are remnants of this volcano. Most.

Hanauma Bay. of the familiar geographic landmarks of eastern Oahu were created by eruptions from Koolau from about 500,000 to 10,000 years ago. The eastern flank of the Koolau volcano including the caldera slid into the sea, leaving the Koolau mountain range that can be seen today on the windward side of the island.The Hanauma Crater was created about 32,000 years ago during the Honolulu volcanic series, the latest (and perhaps final) round of volcanic activity to occur on Oahu. Tens of thousands of years ago, a series of volcanic vents opened along the southeast shoreline of Oahu. Unlike the gentle lava.

Hanauma Bay. flows currently building the island of Hawaii, the late-stage eruptions on Oahu were most often short-lived violent explosions. The volcanic vents that formed Hanauma Crater opened on the sea floor. Upwelling magma vaporized the ocean water and steam explosions blew the magma into fine ash. The explosions built cones or rings of ash, which solidified into tuff. The eruptions shattered the sea floor—coral reef and basalt—and scattered pieces that are now embedded in the tuff. Wave erosion eventually cut through the low, southeast wall of the crater, forming the current bay.## Human history.Due to the lack of fresh water in.

Hanauma Bay. the vicinity, the area was not inhabited, although archeologists have found fishing tools and other indications of human presence there. The bay was used as a recreational area by "aliʻi" (Hawaiian nobility), including King Kamehameha and Queen Ka‘ahumanu, who fished, entertained visitors, and sponsored games there. It was also used as a layover and as a navigational lookout point, since the waters between Oʻahu and Molokaʻi are at times difficult.Hanauma Bay was purchased from the Bernice Pauahi Bishop estate by the City and County of Honolulu, and subsequently opened for public use. It was initially a favorite fishing and picnic.

Hanauma Bay. spot for residents who were willing to travel out to the bay. In the 1930s the road along Hanauma Bay's corner of Oahu was paved and a few other amenities provided that made it easier to visit the beach and reef. After the 1941 attack on Pearl Harbor, barbed wire was placed at the beach and a bunker was constructed for use by sentries. The Bay area reopened after the war and became even more visitor friendly after blasting in the reef for a transoceanic cable provided room for swimming. Hawaii-themed films and television shows, including "Blue Hawaii", "Paradise, Hawaiian.

Hanauma Bay. more area in the reef for swimming, made an additional parking lot, and shipped in white sand from the North Shore, leaving Hanauma Bay increasingly more attractive to visitors.By the late 1980s, the bay had become a major attraction on Oahu. Tourists were brought in by the busload and sometimes as many as 13,000 visitors descended on the beach in one day. Most were uneducated about the fragile marine ecosystem and, unwittingly, "these crowds stirred up sediment, disturbed and trampled the coral and algae, dropped trash, fed the fish and left a slick of suntan lotion on the bay's surface.


Question: How many year do these animal in the image typically live?

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Vipera berus. specimens of 104 (cm) have been observed there on two occasions. In France and Great Britain, the maximum size is 80 - 87 (cm). Mass ranges from 50 (g) to about 180 (g).The head is fairly large and distinct and its sides are almost flat and vertical. The edge of the snout is usually raised into a low ridge. Seen from above, the rostral scale is not visible, or only just. Immediately behind the rostral, there are two (rarely one) small scales.Dorsally, there are usually five large plates: a squarish frontal (longer than wide, sometimes rectangular), two parietals (sometimes with.

Vipera berus. a tiny scale between the frontal and the parietals), and two long and narrow supraoculars. The latter are large and distinct, each separated from the frontal by one to four small scales. The nostril is situated in a shallow depression within a large nasal scale.The eye is relatively large—equal in size or slightly larger than the nasal scale—but often smaller in females. Below the supraoculars are six to 13 (usually eight to 10) small circumorbital scales. The temporal scales are smooth (rarely weakly keeled). There are 10–12 sublabials and six to 10 (usually eight or 9) supralabials. Of the latter,.

Vipera berus. 10 million partridges each year by countryside estates has also been suggested to have a significant impact on adder populations across the UK, with the possibility the reptile could be extinct within 12 years.## Behaviour.This species is mainly diurnal, especially in the north of its range. Further south it is said to be active in the evening, and it may even be active at night during the summer months. It is predominantly a terrestrial species, although it has been known to climb up banks and into low bushes in order to bask or search for prey.Adders are not usually aggressive,.

Vipera berus. toxicity as being relatively low compared to other viper species. They cite Minton (1974) who reported the values for mice to be 0.55 mg/kg IV, 0.80 mg/kg IP and 6.45 mg/kg SC. As a comparison, in one test the minimum lethal dose of venom for a guinea pig was 40–67 mg, but only 1.7 mg was necessary when "Daboia russelii" venom was used. Brown (1973) gives a higher subcutaneous LD50 range of 1.0–4.0 mg/kg. All agree that the venom yield is low: Minton (1974) mentions 10–18 mg for specimens 48 – 62 (cm) in length, while Brown (1973) lists only.

Vipera berus. possible after any bite. Very occasionally bites can be life-threatening, particularly in small children, while adults may experience discomfort and disability long after the bite. The length of recovery varies, but may take up to a year. Surprisingly, Norway has on average registered one death from the snake every 10 years, despite only having 200-500 reports of bites a year.Local symptoms include immediate and intense pain, followed after a few minutes (but perhaps by as much as 30 minutes) by swelling and a tingling sensation. Blisters containing blood are not common. The pain may spread within a few hours, along.


Question: What is the closest upper taxonomy of this plant?

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Coccoloba uvifera. Coccoloba uvifera is a species of flowering plant in the buckwheat family, Polygonaceae, that is native to coastal beaches throughout tropical America and the Caribbean, including southern Florida, the Bahamas, the Greater and Lesser Antilles, and Bermuda. Common names include seagrape and baygrape.## Fruit.In late summer, it bears green fruit, about 2 (cm) diameter, in large, grape-like clusters. The fruit gradually ripens to a purplish color. Each contains a large pit that constitutes most of the volume of the fruit.## Cultivation and propagation.Although it is capable of surviving down to about 2 °C (35.6 °F), the tree cannot survive frost.

Coccoloba uvifera. The leaves turn reddish before withering. The seeds of this plant, once gathered, must be planted immediately, for unlike most plants, the seeds cannot withstand being stored for future planting."C. uvifera" is wind-resistant, moderately tolerant of shade, and highly tolerant of salt, so it is often planted to stabilize beach edges; it is also planted as an ornamental shrub. The fruit is very tasty, and can be used for jam or eaten directly from the tree.Sea grape is a dioecious species, that is, male and female flowers are borne on separate plants, and cross-pollination is necessary for fruit to develop.

Coccoloba uvifera. Honey bees and other insects help pollinate these plants; male and female plants can be distinguished by the appearance of their flowers, as males usually show dead flower stalks.Hardiness: USDA zone 9B–11Propagation: seeds and cuttingsCulture: partial shade/full sun, drought tolerance## Uses."Coccoloba uvifera" is a popular ornamental plant in south Florida yards. It serves as a dune stabilizer and protective habitat for small animals. Tall sea grape plants behind beaches help prevent sea turtles from being distracted by lights from nearby buildings. The sap has been used for dyeing and tanning leather. The wood has occasionally been used in furniture, as.

Coccoloba uvifera. firewood, or for making charcoal. The fruits of the sea grape may be eaten raw, cooked into jellies and jams, or fermented into sea grape wine.## Classification.The first botanical names of the plant were assigned in 1696 by Hans Sloane, who called it "Prunus maritima racemosa", "maritime grape-cluster Prunus", and Leonard Plukenet, who named it "Uvifera littorea", "grape-bearer of the shore", both of which names reflect the European concept of "sea-grape", expressed in a number of languages by the explorers of the times. The natives viewed it as a large mulberry.The first edition of Linnaeus's "Species Plantarum" (1753), based on.

Coccoloba uvifera. Plukenet, assigned the plant to "Polygonum uvifera" and noted "flores non vidi", "I have not seen the flowers." Subsequently, Patrick Browne, "The Civil and Natural History of Jamaica" (1756) devised "Coccoloba" for it. Relying on Browne, Linnaeus' second edition (1762), changed the classification to "Coccolobus uvifera", citing all the other names. "Coccoloba" comes from the Greek "kokkolobis", a kind of grape, literally, "berry pod". Preview available, Google Books.


Question: What place is the lake outflow to?

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Adventfjorden. Adventfjorden (Advent Bay) is a 7 km long and 4 km wide bay running south-eastwards from the southern side of Isfjorden, on the west coast of Spitsbergen in Svalbard. The name represents a corruption of "Adventure Bay" - probably named after the Hull-built whaleship "Adventure", which operated in Isfjorden in 1656. The fjord was originally known as "Klass Billen Bay". At the head of Adventfjorden is Adventdalen (Advent Valley).The former mining-camp of Longyearbyen (now Svalbard's main town) lies on the fjord's southwestern shore, while another former mining-camp, Hiorthhamn, is located on its northeastern shore.Conway, W. M. 1906. No Man's Land:.


Question: What is the immediately prior item that this building follows in a series?

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Palais de Chaillot. The Palais de Chaillot () is a building at the top of the in the Trocadéro area in the 16th "arrondissement" of Paris, France.For the Exposition Internationale of 1937, the old 1878 Palais du Trocadéro was partly demolished and partly rebuilt to create the Palais de Chaillot. It was designed in classicising "moderne" style by architects Louis-Hippolyte Boileau, Jacques Carlu and Léon Azéma. The Palais consists of two separate wings shaped to form a wide arc, which are those of the former building with new taller portions built in front. The pair of larger central pavilions are also those of.


Question: Who is the creator of this building?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Statue of Zeus at Olympia. The Statue of Zeus at Olympia was a giant seated figure, about 12.4 (m) tall, made by the Greek sculptor Phidias around 435 BC at the sanctuary of Olympia, Greece, and erected in the Temple of Zeus there. Zeus is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus.The statue was a chryselephantine sculpture of ivory plates and gold panels on a wooden framework. Zeus sat on a painted cedarwood throne ornamented with ebony, ivory, gold, and precious stones. It was one of the Seven Wonders of the Ancient World.

Statue of Zeus at Olympia. The statue was lost and destroyed during the 5th century AD; details of its form are known only from ancient Greek descriptions and representations on coins.## History.The statue of Zeus was commissioned by the Eleans, custodians of the Olympic Games, in the latter half of the fifth century BC for their newly constructed Temple of Zeus. Seeking to outdo their Athenian rivals, the Eleans employed sculptor Phidias, who had previously made the massive statue of Athena Parthenos in the Parthenon.The statue occupied half the width of the aisle of the temple built to house it. The geographer Strabo noted early.

Statue of Zeus at Olympia. of the image was paved with black tiles and surrounded by a raised rim of marble to contain the oil. This reservoir acted as a reflecting pool which doubled the apparent height of the statue.According to the Roman historian Livy, the Roman general Aemilius Paullus (the victor over Macedon) saw the statue and "was moved to his soul, as if he had seen the god in person", while the 1st-centuryAD Greek orator Dio Chrysostom declared that a single glimpse of the statue would make a man forget all his earthly troubles.According to a legend, when Phidias was asked what inspired.

Statue of Zeus at Olympia. him—whether he climbed Mount Olympus to see Zeus, or whether Zeus came down from Olympus so that Phidias could see him—the artist answered that he portrayed Zeus according to Book One, verses 528–530 of Homer's "Iliad": The sculptor also was reputed to have immortalised Pantarkes, the winner of the boys' wrestling event at the eighty-sixth Olympiad who was said to have been his "beloved" (), by carving ("Pantarkes is beautiful") into Zeus's little finger, and by placing a relief of the boy crowning himself at the feet of the statue.According to Pausanias, "when the image was quite finished Pheidias prayed.

Statue of Zeus at Olympia. statue perished along with the temple, which was severely damaged by fire in 425 AD. But earlier loss or damage is implied by Lucian of Samosata in the later 2nd century, who referenced it in "Timon": "they have laid hands on your person at Olympia, my lord High-Thunderer, and you had not the energy to wake the dogs or call in the neighbours; surely they might have come to the rescue and caught the fellows before they had finished packing up the loot."## Phidias' workshop.The approximate date of the statue (the third quarter of the 5th century BC) was confirmed.

Statue of Zeus at Olympia. in the rediscovery (1954–1958) of Phidias' workshop, approximately where Pausanias said the statue of Zeus was constructed. Archaeological finds included tools for working gold and ivory, ivory chippings, precious stones and terracotta moulds. Most of the latter were used to create glass plaques, and to form the statue's robe from sheets of glass, naturalistically draped and folded, then gilded. A cup inscribed "ΦΕΙΔΙΟΥ ΕΙΜΙ" or "I belong to Phidias" was found at the site.List of tallest statues"George Washington", 1840 statue Kenneth D. S. Lapatin, "Chryselephantine Statuary in the Ancient Mediterranean World," Oxford University Press (2001) Alfred Mallwitz and Wolfgang Schiering,.

Statue of Zeus at Olympia. "Die Werkstatt des Pheidias in Olympia I: Olympische Forschungen V," Berlin: Walter de Gruyter (1964) Wolfgang Schiering, "Die Werkstatt des Pheidias in Olympia II: Werkstattfunde: Olympische Forschungen XVIII", Berlin: Walter de Gruyter (1991) Janette McWilliam, Rashna Taraporewalla, Tom Stevenson, and Sonia Puttock (Ed.), "The Statue of Zeus at Olympia. New Approaches". Cambridge, Cambridge Scholars Publishing (2011)Barringer, Judith M. 2010. "Zeus at Olympia." In "The gods of ancient Greece: Identities and transformations." Edited by Jan Bremmer and Andrew Erskine, 155–77. Edinburgh: Edinburgh Univ. Press.Boardman, John. 1985. "Greek sculpture: The Classical period." London: Thames & Hudson.Lapatin, Kenneth D. S. 2001. "Chryselephantine statuary.

Statue of Zeus at Olympia. "The colossal Zeus statue of Pheidias" David Fenzl "Recreating Olympic Statuary"History.com: the Seven Wonders.


Question: What kind of effect does this object have?

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Airplane. North American X-15 broke many speed and altitude records in the 1960s and pioneered engineering concepts for later aircraft and spacecraft. Military transport aircraft may employ rocket-assisted take offs for short-field situations. Otherwise, rocket aircraft include spaceplanes, like SpaceShipTwo, for travel beyond the Earth's atmosphere and sport aircraft developed for the short-lived Rocket Racing League.## Design and manufacture.Most airplanes are constructed by companies with the objective of producing them in quantity for customers. The design and planning process, including safety tests, can last up to four years for small turboprops or longer for larger planes.During this process, the objectives and.

Airplane. resulted in reduced noise from aircraft engines in response to increased noise pollution from growth in air traffic over urban areas near airports.Small planes can be designed and constructed by amateurs as homebuilts. Other homebuilt aircraft can be assembled using pre-manufactured kits of parts that can be assembled into a basic plane and must then be completed by the builder.Few companies produce planes on a large scale. However, the production of a plane for one company is a process that actually involves dozens, or even hundreds, of other companies and plants, that produce the parts that go into the plane.

Airplane. to stabilize the plane's pitch (tilt up or down) and mounts the elevators, which provide pitch control. "Landing gear", a set of wheels, skids, or floats that support the plane while it is on the surface. On seaplanes, the bottom of the fuselage or floats (pontoons) support it while on the water. On some planes the landing gear retracts during flight to reduce drag.## Wings.The wings of a fixed-wing aircraft are static planes extending either side of the aircraft. When the aircraft travels forwards, air flows over the wings, which are shaped to create lift. This shape is called an.

Airplane. instruments.Airplanes have complex flight control systems. The main controls allow the pilot to direct the aircraft in the air by controlling the attitude (roll, pitch and yaw) and engine thrust.On manned aircraft, cockpit instruments provide information to the pilots, including flight data, engine output, navigation, communications and other aircraft systems that may be installed.## Safety.When risk is measured by deaths per passenger kilometer, air travel is approximately 10 times safer than travel by bus or rail. However, when using the deaths per journey statistic, air travel is significantly more dangerous than car, rail, or bus travel. Air travel insurance is.

Airplane. relatively expensive for this reason—insurers generally use the deaths per journey statistic. There is a significant difference between the safety of airliners and that of smaller private planes, with the per-mile statistic indicating that airliners are 8.3 times safer than smaller planes.## Environmental impact.Like all activities involving combustion, fossil-fuel-powered aircraft release soot and other pollutants into the atmosphere. Greenhouse gases such as carbon dioxide (CO2) are also produced. In addition, there are environmental impacts specific to airplanes: for instance, Airplanes operating at high altitudes near the tropopause (mainly large jet airliners) emit aerosols and leave contrails, both of which can.

Airplane. increase cirrus cloud formationcloud cover may have increased by up to 0.2% since the birth of aviation. Airplanes operating at high altitudes near the tropopause can also release chemicals that interact with greenhouse gases at those altitudes, particularly nitrogen compounds, which interact with ozone, increasing ozone concentrations. Most light piston aircraft burn avgas, which contains tetraethyllead (TEL). Some lower-compression piston engines can operate on unleaded mogas and turbine engines and diesel enginesneither of which require leadare used on some newer light aircraft. Some non-polluting light electric aircraft are already in production.Another environmental impact of airplanes is noise pollution, mainly caused.


Question: What country does this building belong to?

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Shell Centre. and Waterloo East.The Downstream Building was disposed of by Shell in the 1990s, and is now a block of residential apartments known as the "White House", and has been heightened by a storey.## Site history and layout.The Shell Centre occupies part of the site cleared for the 1951 Festival of Britain. The areas closer to the River Thames now include Jubilee Gardens and the South Bank Centre. Jubilee Gardens remained undeveloped prior to its laying out as an open space, largely because of a restrictive covenant in favour of Shell that restricts any building on the part of the site.

Shell Centre. curtain wall glazing.The original interiors were luxuriously appointed, and as well as contributions from a British design team (many of whom had worked on the Festival of Britain), they included work by Ernesto Nathan Rogers who had worked on the Torre Velasca in Milan. Facilities for staff were lavish by the standards of the time, and the basement of the building was designed with a full size swimming pool and a spacious gymnasium.The basement also originally housed a rifle range, snooker room, a small supermarket for staff and a host of other facilities. Until 1998, there was also a fully.

Shell Centre. the Midland Grand Hotel as the tallest storied building in London, and the Royal Liver Building as the tallest in the United Kingdom. On completion the building also held the record for the largest office building, by floor space, in Europe.## Functions and occupation of the buildings.In addition to being the headquarters for the group, it also acts as the main offices of the following Shell businesses; refining and marketing, along with a number of functional support activities such as finance and human resources. The Shell Centre is also the head office of Shell's United Kingdom business (Shell UK Ltd.),.


Question: What is the closest upper taxonomy of this plant?

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Pulsatilla alpina. Pulsatilla alpina, the alpine pasqueflower or alpine anemone, is a species of flowering plant in the family Ranunculaceae, native to the mountain ranges of central and southern Europe, from central Spain to Croatia. It is an herbaceous perennial growing to 15 - 30 (cm) tall by 20 (cm) wide, and can be found at altitudes of 1200 - 2700 (m).## Characteristics."Pulsatilla alpina" has deeply divided, hairy leaves. It has more upright flowers than other species of "Pulsatilla", which generally have drooping flowers. They are white or, in the case of subsp. "apiifolia", yellow. The flowers are produced very early, often.

Pulsatilla alpina. opening while still under snow cover. They have prominent yellow stamens. As with all pasqueflowers, the flowers have a silky, hairy texture, and are followed by prominent seedheads which persist on the plant for many weeks.## Subspecies.A number of subspecies are recognised, based largely on the form and hairiness of the leaves. "P. alpina" subsp. "schneebergensis" is endemic to the easternmost Alps of Austria, and is named after the Schneeberg mountain. It is replaced further west by the widespread taxon "P. alpina" subsp. "alpina". "P. alpina" subsp. "austroalpina" is found in the Southern Alps from Switzerland eastwards, most commonly over.

Pulsatilla alpina. dolomite. "P. alpina" subsp. "apiifolia" and "P. alpina" subsp. "alba" grow over siliceous rock, but are easily distinguished by the flower colour. Further subspecies have been named for local variants in the Cantabrian Mountains (subsp. "cantabrica") and Corsica (subsp. "cyrnea").## Cultivation."Pulsatilla alpina" is suitable for cultivation in an alpine garden, or in any sharply drained soil in full sun. It is extremely hardy but dislikes winter wet. The subspecies "P. alpina" subsp. "apiifolia" has gained the Royal Horticultural Society's Award of Garden Merit."Pulsatilla koreana""Pulsatilla patens" Anemone pulsatilla, Wildflowers index, Department of Horticultural Science of NC State University Edible and Medicinal.

Pulsatilla alpina. plants of the West, Gregory L. Tilford,.


Question: What is the closest upper taxonomy of this animal?

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Yak. The domestic yak (Bos grunniens), also known as the Tartary ox, grunting ox or hairy cattle, is a species of long-haired domesticated cattle found throughout the Himalayan region of the Indian subcontinent, the Tibetan Plateau, Northern Myanmar, Yunnan, Sichuan Gilgit-Baltistan Pakistan and as far north as Mongolia and Siberia. It is descended from the wild yak ("Bos mutus").## Etymology.The English word "yak" originates from the . In Tibetan and Balti it refers only to the male of the species, the female being called , or in Tibetan and in Balti. In English, as in most other languages that have borrowed.

Yak. the word, "yak" is usually used for both sexes, with "bull" or "cow" referring to each sex separately.## Taxonomy.Belonging to the genus "Bos", Yaks are related to cattle ("Bos primigenius"). Mitochondrial DNA analyses to determine the evolutionary history of yaks have been inconclusive.The yak may have diverged from cattle at any point between one and five million years ago, and there is some suggestion that it may be more closely related to bison than to the other members of its designated genus. Apparent close fossil relatives of the yak, such as "Bos baikalensis", have been found in eastern Russia, suggesting.

Yak. a possible route by which yak-like ancestors of the modern American bison could have entered the Americas.The species was originally designated as "Bos grunniens" ("grunting ox") by Linnaeus in 1766, but this name is now generally considered to refer only to the domesticated form of the animal, with "Bos mutus" ("mute ox") being the preferred name for the wild species. Although some authors still consider the wild yak to be a subspecies, "Bos grunniens mutus", the ICZN made an official ruling in 2003 permitting the use of the name "Bos mutus" for wild yaks, and this is now the more.

Yak. common usage.Except where the wild yak is considered as a subspecies of "Bos grunniens", there are no recognised subspecies of yak.## Physical characteristics.Yaks are heavily built animals with bulky frames, sturdy legs, rounded, cloven hooves, and extremely dense, long fur that hangs down lower than the belly. While wild yaks are generally dark, blackish to brown in colouration, domestic yaks can be quite variable in colour, often having patches of rusty brown and cream. They have small ears and wide foreheads, with smooth horns that are generally dark in colour. In males (bulls), the horns sweep out from the sides.

Yak. cold. Females have four teats.Yaks are not known to produce the characteristic lowing (mooing) sound of cattle, but both wild and domestic yaks grunt and squeak, which inspired the scientific name of the domestic yak variant, "Bos grunniens" (grunting bull). Nikolay Przhevalsky named the wild variant "Bos mutus" (silent bull) believing that it did not make a sound at all, but it does.## Physiology.Yak physiology is well adapted to high altitudes, having larger lungs and heart than cattle found at lower altitudes, as well as greater capacity for transporting oxygen through their blood, due to the persistence of foetal haemoglobin.

Yak. མཛོ། as well as fertile females known as མཛོ་མོ། or , which may be crossed again with cattle. The "Dwarf Lulu" breed, "the only "Bos primigenius taurus" type of cattle in Nepal" has been tested for DNA markers and found to be a mixture of both taurine and zebu types of cattle ("B. p. taurus" and "B. p. indicus") with yak. According to the International Veterinary Information Service, the low productivity of second generation cattle-yak crosses makes them suitable only as meat animals.Crosses between yaks and domestic cattle ("Bos primigenius taurus") have been recorded in Chinese literature for at least.


Question: Where is the habitat of this plant?

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Acer macrophyllum. and more exceptionally 1200 (m). It can form pure stands on moist soils in proximity to streams, but are generally found within riparian hardwood forests or dispersed, (under or within), relatively open canopies of conifers, mixed evergreens, or oaks ("Quercus" spp.) In cool and moist temperate mixed woods they are one of the dominant species. It is very rare north of Vancouver Island though cultivated in Prince Rupert, near Ketchikan, and in Juneau.## Ecology.The tree can live in a wide range of habitats, but thrives in fairly well-hydrated hardwood forests, occurring with red alder, black cottonwood, and willows. It is.


Question: What is the basionym of this plant?

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Prumnopitys ferruginea. Prumnopitys ferruginea, commonly called miro, is an evergreen coniferous tree which is endemic to New Zealand. Before the genus "Prumnopitys" was distinguished, it was treated in the related genus "Podocarpus" as "Podocarpus ferrugineus".It grows up to 25 m high, with a trunk up to 1.3 m diameter. The leaves are linear to sickle-shaped, 15–25 mm long and 2–3 mm broad, with downcurved margins. The plants are dioecious with pollen cones being solitary while those of female plants hang from a curved, scaly stalk. The seed cones are highly modified, reduced to a central stem 2–3 cm long bearing 1-3 scales,.


Question: What equipment or engine is used by this item to provide power?

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Electric motor. An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. An electric generator is mechanically identical to an electric motor, but operates with a reversed flow of power, converting mechanical energy into electrical energy.Electric motors can be powered by direct current (DC) sources, such as from batteries, or rectifiers, or by alternating current (AC) sources, such as a power grid, inverters or electrical generators.Electric.

Electric motor. braking with traction motors, electric motors can be used in reverse as generators to recover energy that might otherwise be lost as heat and friction.Electric motors produce linear or rotary force (torque) intended to propel some external mechanism, such as a fan or an elevator. An electric motor is generally designed for continuous rotation, or for linear movement over a significant distance compared to its size. Magnetic solenoids are also transducers that convert electrical power to mechanical motion, but can produce motion over only a limited distance.## History.## Early motors.Before modern electromagnetic motors, experimental motors that worked by electrostatic force.

Electric motor. persistent electric currents. Hans Christian Ørsted discovered in 1820 that an electric current creates a magnetic field, which can exert a force on a magnet. It only took a few weeks for André-Marie Ampère to develop the first formulation of the electromagnetic interaction and present the Ampère's force law, that described the production of mechanical force by the interaction of an electric current and a magnetic field. The first demonstration of the effect with a rotary motion was given by Michael Faraday on 3 September 1821 in the basement of the Royal Institution. A free-hanging wire was dipped into a.

Electric motor. pool of mercury, on which a permanent magnet (PM) was placed. When a current was passed through the wire, the wire rotated around the magnet, showing that the current gave rise to a close circular magnetic field around the wire. Faraday published the results of his discovery in the "Quarterly Journal of Science", and sent copies of his paper along with pocket-sized models of his device to colleagues around the world so they could also witness the phenomenon of electromagnetic rotations. This motor is often demonstrated in physics experiments, substituting brine for (toxic) mercury. Barlow's wheel was an early refinement.

Electric motor. to this Faraday demonstration, although these and similar homopolar motors remained unsuited to practical application until late in the century.In 1827, Hungarian physicist Ányos Jedlik started experimenting with electromagnetic coils. After Jedlik solved the technical problems of continuous rotation with the invention of the commutator, he called his early devices "electromagnetic self-rotors". Although they were used only for teaching, in 1828 Jedlik demonstrated the first device to contain the three main components of practical DC motors: the stator, rotor and commutator. The device employed no permanent magnets, as the magnetic fields of both the stationary and revolving components were produced.

Electric motor. then higher performance.In 1855, Jedlik built a device using similar principles to those used in his electromagnetic self-rotors that was capable of useful work. He built a model electric vehicle that same year.A major turning point came in 1864, when Antonio Pacinotti first described the ring armature (although initially conceived in a DC generator, i.e. a dynamo). This featured symmetrically-grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current. The first commercially successful DC motors followed the developments by Zénobe Gramme who, in 1871, reinvented Pacinotti's design and adopted.

Electric motor. from such tasks as handling grain or pumping water. Household uses (like in washing machines, dishwashers, fans, air conditioners and refrigerators (replacing ice boxes)) of electric motors reduced heavy labor in the home and made higher standards of convenience, comfort and safety possible. Today, electric motors consume more than half of the electric energy produced in the US.## AC motors.In 1824, French physicist François Arago formulated the existence of rotating magnetic fields, termed Arago's rotations, which, by manually turning switches on and off, Walter Baily demonstrated in 1879 as in effect the first primitive induction motor. In the 1880s many.

Electric motor. stator, which does not. It also includes two electrical parts, a set of magnets and an armature, one of which is attached to the rotor and the other to the stator, together forming a magnetic circuit: Field magnets - The magnets create a magnetic field that passes through the armature. These can be electromagnets or permanent magnets. The field magnet is usually on the stator and the armature on the rotor, but in some types of motor these are reversed.## Bearings.The rotor is supported by bearings, which allow the rotor to turn on its axis. The bearings are in turn.

Electric motor. supported by the motor housing.## Rotor.The rotor is the moving part that delivers the mechanical power. The rotor typically holds conductors that carry currents, which the magnetic field of the stator exerts force on to turn the shaft. Alternatively, some rotors carry permanent magnets, and the stator holds the conductors. Permanent magnets offer high efficiency over a larger operating speed and power range.An air gap between the stator and rotor allows it to turn. The width of the gap has a significant effect on the motor's electrical characteristics. It is generally made as small as possible, as a large gap.

Electric motor. weakens performance. It is the main source of the low power factor at which motors operate. The magnetizing current increases and the power factor decreases with the air gap, so narrow gaps are better. Conversely, gaps that are too small may pose mechanical problems in addition to noise and losses.The motor shaft extends through the bearings to the outside of the motor, where the load is applied. Because the forces of the load are exerted beyond the outermost bearing, the load is said to be overhung.## Stator.The stator surrounds the rotor, and usually holds field magnets, which are either electromagnets.

Electric motor. consisting of wire windings around a ferromagnetic iron core or permanent magnets. These create a magnetic field that passes through the rotor armature, exerting force on the windings. The stator core is made up of many thin metal sheets that are insulated from each other, called laminations. Laminations are used to reduce energy losses that would result if a solid core were used. Resin-packed motors, used in washing machines and air conditioners, use the damping properties of resin (plastic) to reduce noise and vibration. These motors encapsulate the stator in plastic.## Armature.The armature consists of wire windings on a ferromagnetic.

Electric motor. core. Electric current passing through the wire causes the magnetic field from the field magnet to exert a force (Lorentz force) on it, turning the rotor, which delivers the mechanical output. Windings are wires that are laid in coils, usually wrapped around a laminated, soft, iron, ferromagnetic core so as to form magnetic poles when energized with current.Electric machines come in salient- and nonsalient-pole configurations. In a salient-pole motor the ferromagnetic cores on the rotor and stator have projections called poles facing each other, with a wire winding around each pole below the pole face, which become north or south.

Electric motor. poles of the magnetic field when current flows through the wire. In a nonsalient-pole (or distributed field or round-rotor) motor, the ferromagnetic core is a smooth cylinder, with the windings distributed evenly in slots about the circumference. Supplying alternating current in the windings creates poles in the core that rotate continuously. A shaded-pole motor has a winding around part of the pole that delays the phase of the magnetic field for that pole.## Commutator.A commutator is a rotary electrical switch that supplies current to the rotor. It periodically reverses the flow of current in the rotor windings as the shaft.

Electric motor. each rotor winding would reverse with each half turn, so the rotor would stop. Commutators are inefficient and commutated motors have been mostly replaced by brushless direct current motors, permanent magnet motors, and induction motors.## Motor supply and control.## Motor supply.A DC motor is usually supplied through a split ring commutator as described above. AC motors' commutation can be achieved using either a slip ring commutator or external commutation. It can be fixed-speed or variable-speed control type, and can be synchronous or asynchronous. Universal motors can run on either AC or DC.## Motor control.DC motors can be operated at variable.

Electric motor. speeds by adjusting the voltage applied to the terminals or by using pulse-width modulation (PWM).AC motors operated at a fixed speed are generally powered directly from the grid or through motor soft starters.AC motors operated at variable speeds are powered with various power inverter, variable-frequency drive or electronic commutator technologies.The term electronic commutator is usually associated with self-commutated brushless DC motor and switched reluctance motor applications.## Types.Electric motors operate on one of three physical principles: magnetism, electrostatics and piezoelectricity.In magnetic motors, magnetic fields are formed in both the rotor and the stator. The product between these two fields gives rise.

Electric motor. to a force, and thus a torque on the motor shaft. One, or both, of these fields must change with the rotation of the rotor. This is done by switching the poles on and off at the right time, or varying the strength of the pole.The main types are DC motors and AC motors, with the latter replacing the former. AC electric motors are either asynchronous or synchronous.Once started, a synchronous motor requires synchrony with the moving magnetic field's speed for all normal torque conditions.In synchronous machines, the magnetic field must be provided by means other than induction, such as.

Electric motor. from separately excited windings or permanent magnets.A fractional-horsepower motor either has a rating below about 1 horsepower (0.746 kW), or is manufactured with a standard-frame size smaller than a standard 1 HP motor. Many household and industrial motors are in the fractional-horsepower class.Notes: Rotation is independent of the frequency of the AC voltage. Rotation is equal to synchronous speed (motor-stator-field speed). In SCIM, fixed-speed operation rotation is equal to synchronous speed, less slip speed. In non-slip energy-recovery systems, WRIM is usually used for motor-starting but can be used to vary load speed. Variable-speed operation. Whereas induction- and synchronous-motor drives are.

Electric motor. typically with either six-step or sinusoidal-waveform output, BLDC-motor drives are usually with trapezoidal-current waveform; the behavior of both sinusoidal and trapezoidal PM machines is, however, identical in terms of their fundamental aspects. In variable-speed operation, WRIM is used in slip-energy recovery and double-fed induction-machine applications. A cage winding is a shorted-circuited squirrel-cage rotor, a wound winding is connected externally through slip rings. Mostly single-phase with some three-phase.Abbreviations: BLAC – Brushless AC BLDC – Brushless DC BLDM – Brushless DC motor EC – Electronic commutator PM – Permanent magnet IPMSM – Interior permanent-magnet synchronous motor PMSM – Permanent magnet synchronous motor.

Electric motor. SPMSM – Surface permanent magnet synchronous motor SCIM – Squirrel-cage induction motor SRM – Switched reluctance motor SyRM – Synchronous reluctance motor VFD – Variable-frequency drive WRIM – Wound-rotor induction motor WRSM – Wound-rotor synchronous motor LRA – Locked-rotor amps: The current you can expect under starting conditions when you apply full voltage. It occurs instantly during start-up. RLA – Rated-load amps: The maximum current a motor should draw under any operating conditions. Often mistakenly called running-load amps, which leads people to believe, incorrectly, that the motor should always pull these amps. FLA – Full-load amps: Changed in 1976 to.

Electric motor. "RLA – rated-load amps".## Self-commutated motor.## Brushed DC motor.Most DC motors are small permanent magnet (PM) types. They contain a brushed internal mechanical commutation to reverse motor windings' current in synchronism with rotation.## Electrically excited DC motor.A commutated DC motor has a set of rotating windings wound on an armature mounted on a rotating shaft. The shaft also carries the commutator. Thus, every brushed DC motor has AC flowing through its windings. Current flows through one or more pairs of brushes that touch the commutator; the brushes connect an external source of electric power to the rotating armature.The rotating armature.

Electric motor. consists of one or more wire coils wound around a laminated, magnetically "soft" ferromagnetic core. Current from the brushes flows through the commutator and one winding of the armature, making it a temporary magnet (an electromagnet). The magnetic field produced interacts with a stationary magnetic field produced by either PMs or another winding (a field coil), as part of the motor frame. The force between the two magnetic fields rotates the shaft. The commutator switches power to the coils as the rotor turns, keeping the poles from ever fully aligning with the magnetic poles of the stator field, so that.

Electric motor. – A set of windings that produces a magnetic field. Commutation: A mechanical technique in which rectification can be achieved, or from which DC can be derived.The five types of brushed DC motor are: Shunt-wound Series-wound Compound (two configurations): Cumulative compound Differentially compounded Permanent magnet (not shown) Separately excited (not shown).## Permanent magnet.A permanent magnet (PM) motor does not have a field winding on the stator frame, relying instead on PMs to provide the magnetic field. Compensating windings in series with the armature may be used on large motors to improve commutation under load. This field is fixed and cannot.

Electric motor. be adjusted for speed control. PM fields (stators) are convenient in miniature motors to eliminate the power consumption of the field winding. Most larger DC motors are of the "dynamo" type, which have stator windings. Historically, PMs could not be made to retain high flux if they were disassembled; field windings were more practical to obtain the needed flux. However, large PMs are costly, as well as dangerous and difficult to assemble; this favors wound fields for large machines.To minimize overall weight and size, miniature PM motors may use high energy magnets made with neodymium; most are neodymium-iron-boron alloy. With.

Electric motor. their higher flux density, electric machines with high-energy PMs are at least competitive with all optimally designed singly-fed synchronous and induction electric machines. Miniature motors resemble the structure in the illustration, except that they have at least three rotor poles (to ensure starting, regardless of rotor position) and their outer housing is a steel tube that magnetically links the exteriors of the curved field magnets.## Electronic commutator (EC).## Brushless DC.Some of the problems of the brushed DC motor are eliminated in the BLDC design. In this motor, the mechanical "rotating switch" or commutator is replaced by an external electronic switch.

Electric motor. synchronised to the rotor's position. BLDC motors are typically 85%+ efficient, reaching up to 96.5%, while brushed DC motors are typically 75–80% efficient.The BLDC motor's characteristic trapezoidal counter-electromotive force (CEMF) waveform is derived partly from the stator windings being evenly distributed, and partly from the placement of the rotor's permanent magnets. Also known as electronically commutated DC or inside-out DC motors, the stator windings of trapezoidal BLDC motors can be single-phase, two-phase or three-phase and use Hall effect sensors mounted on their windings for rotor position sensing and low cost closed-loop commutator control.BLDC motors are commonly used where precise speed.

Electric motor. motors are usually used in small equipment such as computers and are generally used in fans to remove heat. They make little noise, which is an advantage in equipment that is affected by vibrations.Modern BLDC motors range in power from a fraction of a watt to many kilowatts. Larger BLDC motors rated up to about 100 kW are used in electric vehicles. They also find use in electric model aircraft.## Switched reluctance motor.The switched reluctance motor (SRM) has no brushes or permanent magnets, and the rotor has no electric currents. Torque comes from a slight misalignment of poles on the.

Electric motor. rotor with poles on the stator. The rotor aligns itself with the magnetic field of the stator, while the stator field windings are sequentially energized to rotate the stator field.The magnetic flux created by the field windings follows the path of least magnetic sending the flux through rotor poles that are closest to the energized poles of the stator, thereby magnetizing those poles of the rotor and creating torque. As the rotor turns, different windings are energized, keeping the rotor turning.SRMs are used in some appliances and vehicles.## Universal AC/DC motor.A commutated, electrically excited, series or parallel wound motor is.

Electric motor. referred to as a universal motor because it can be designed to operate on either AC or DC power. A universal motor can operate well on AC because the current in both the field and the armature coils (and hence the resultant magnetic fields) synchronously reverse polarity, and hence the resulting mechanical force occurs in a constant direction of rotation.Operating at normal power line frequencies, universal motors are often used in sub-kilowatt applications. Universal motors formed the basis of the traditional railway traction motor in electric railways. In this application, using AC power on a motor designed to run on.

Electric motor. DC would experience efficiency losses due to eddy current heating of their magnetic components, particularly the motor field pole-pieces that, for DC, would have used solid (un-laminated) iron. They are now rarely used.An advantage is that AC power may be used on motors that specifically have high starting torque and compact design if high running speeds are used. By contrast, maintenance is higher and lifetimes are shortened. Such motors are used in devices that are not heavily used, and have high starting-torque demands. Multiple taps on the field coil provide (imprecise) stepped speed control. Household blenders that advertise many speeds.

Electric motor. an asynchronous AC motor where power is transferred to the rotor by electromagnetic induction, much like transformer action. An induction motor resembles a rotating transformer, because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Polyphase induction motors are widely used in industry.## Cage and wound rotor.Induction motors may be divided into Squirrel Cage Induction Motors (SCIM) and Wound Rotor Induction Motors (WRIM). SCIMs have a heavy winding made up of solid bars, usually aluminum or copper, electrically connected by rings at the ends of the rotor. The.

Electric motor. bars and rings as a whole are much like an animal's rotating exercise cage.Currents induced into this winding provide the rotor magnetic field. The shape of the rotor bars determines the speed-torque characteristics. At low speeds, the current induced in the squirrel cage is nearly at line frequency and tends to stay in the outer parts of the cage. As the motor accelerates, the slip frequency becomes lower, and more current reaches the interior. By shaping the bars to change the resistance of the winding portions in the interior and outer parts of the cage, a variable resistance is effectively.

Electric motor. steering wheels.Another common application is to control the throttle of an internal combustion engine with an electronic governor. The motor works against a return spring to move the throttle in accord with the governor output. The latter monitors engine speed by counting electrical pulses from the ignition system or from a magnetic pickup and depending on the speed, makes small adjustments to the amount of current. If the engine slows down relative to the desired speed, the current increases, producing more torque, pulling against the return spring and opening the throttle. Should the engine run too fast, the governor reduces.

Electric motor. the current, allowing the return spring to pull back and reduce the throttle.## Synchronous motor.A synchronous electric motor is an AC motor. It includes a rotor spinning with coils passing magnets at the same frequency as the AC and produces a magnetic field to drive it. It has zero slip under typical operating conditions. By contrast induction motors must slip to produce torque. One type of synchronous motor is like an induction motor except that the rotor is excited by a DC field. Slip rings and brushes conduct current to the rotor. The rotor poles connect to each other and.

Electric motor. when slip rate decreases sufficiently, the rotor (a smooth cylinder) becomes temporarily magnetized. Its distributed poles make it act like a permanent magnet synchronous motor. The rotor material, like that of a common nail, stays magnetized, but can be demagnetized with little difficulty. Once running, the rotor poles stay in place; they do not drift.Low-power synchronous timing motors (such as those for traditional electric clocks) may have multi-pole permanent magnet external cup rotors, and use shading coils to provide starting torque. "Telechron" clock motors have shaded poles for starting torque, and a two-spoke ring rotor that performs like a discrete.

Electric motor. allows for a smaller electronic converter but the cost of the rotor winding and slip rings may offset the saving in the power electronics components. Difficulties affect controlling speed near synchronous speed limit applications.## Special magnetic motors.## Rotary.## Ironless or coreless rotor motor.The coreless or ironless DC motor is a specialized permanent magnet DC motor. Optimized for rapid acceleration, the rotor is constructed without an iron core. The rotor can take the form of a winding-filled cylinder, or a self-supporting structure comprising only wire and bonding material. The rotor can fit inside the stator magnets; a magnetically soft stationary cylinder.

Electric motor. inside the rotor provides a return path for the stator magnetic flux. A second arrangement has the rotor winding basket surrounding the stator magnets. In that design, the rotor fits inside a magnetically soft cylinder that can serve as the motor housing, and provides a return path for the flux.Because the rotor is much lower mass than a conventional rotor, it can accelerate much more rapidly, often achieving a mechanical time constant under one millisecond. This is especially true if the windings use aluminum rather than (heavier) copper. The rotor has no metal mass to act as a heat sink;.

Electric motor. even small motors must be cooled. Overheating can be an issue for these designs.The vibrating alert of cellular phones can be generated by cylindrical permanent-magnet motors, or disc-shaped types that have a thin multipolar disc field magnet, and an intentionally unbalanced molded-plastic rotor structure with two bonded coreless coils. Metal brushes and a flat commutator switch power to the rotor coils.Related limited-travel actuators have no core and a bonded coil placed between the poles of high-flux thin permanent magnets. These are the fast head positioners for rigid-disk ("hard disk") drives. Although the contemporary design differs considerably from that of loudspeakers,.

Electric motor. it is still loosely (and incorrectly) referred to as a "voice coil" structure, because some earlier rigid-disk-drive heads moved in straight lines, and had a drive structure much like that of a loudspeaker.## Pancake or axial rotor motor.The printed armature or pancake motor has windings shaped as a disc running between arrays of high-flux magnets. The magnets are arranged in a circle facing the rotor spaced to form an axial air gap. This design is commonly known as the pancake motor because of its flat profile.The armature (originally formed on a printed circuit board) is made from punched copper sheets.

Electric motor. with 180 (C), Class H rating.The unique advantage of ironless DC motors is the absence of cogging (torque variations caused by changing attraction between the iron and the magnets). Parasitic eddy currents cannot form in the rotor as it is totally ironless, although iron rotors are laminated. This can greatly improve efficiency, but variable-speed controllers must use a higher switching rate (>40 kHz) or DC because of decreased electromagnetic induction.These motors were invented to drive the capstan(s) of magnetic tape drives, where minimal time to reach operating speed and minimal stopping distance were critical. Pancake motors are widely used in.

Electric motor. high-performance servo-controlled systems, robotic systems, industrial automation and medical devices. Due to the variety of constructions now available, the technology is used in applications from high temperature military to low cost pump and basic servos.Another approach (Magnax) is to use a single stator sandwiched between two rotors. One such design has produced peak power of 15 kW/kg, sustained power around 7.5 kW/kg. This yokeless axial flux motor offers a shorter flux path, keeping the magnets further from the axis. The design allows zero winding overhang; 100 percent of the windings are active. This is enhanced with the use of rectangular-crosssection.

Electric motor. copper wire. The motors can be stacked to work in parallel. Instabilities are minimized by ensuring that the two rotor discs put equal and opposing forces onto the stator disc. The rotors are connected directly to one another via a shaft ring, cancelling out the magnetic forces.Magnax motors range in size from 0.15-5.4 (m) in diameter.## Servo motor.A servo motor is a motor that is used within a position-control or speed-control feedback system. Servomotors are used in applications such as machine tools, pen plotters, and other process systems. Motors intended for use in a servomechanism must have predictable characteristics for.

Electric motor. speed, torque, and power. The speed/torque curve is important and is high ratio for a servo motor. Dynamic response characteristics such as winding inductance and rotor inertia are important; these factors limit performance. Large, powerful, but slow-responding servo loops may use conventional AC or DC motors and drive systems with position or speed feedback. As dynamic response requirements increase, more specialized motor designs such as coreless motors are used. AC motors' superior power density and acceleration characteristics tends to favor permanent magnet synchronous, BLDC, induction, and SRM drive approaches.A servo system differs from some stepper motor applications in that position.

Electric motor. feedback is continuous while the motor is running. A stepper system inherently operates open-loop—relying on the motor not to "miss steps" for short term accuracy—with any feedback such as a "home" switch or position encoder external to the motor system.## Stepper motor.Stepper motors are typically used to provide precise rotations. An internal rotor containing permanent magnets or a magnetically soft rotor with salient poles is controlled by a set of electronically switched external magnets. A stepper motor may also be thought of as a cross between a DC electric motor and a rotary solenoid. As each coil is energized in.

Electric motor. turn, the rotor aligns itself with the magnetic field produced by the energized field winding. Unlike a synchronous motor, the stepper motor may not rotate continuously; instead, it moves in steps—starting and then stopping—advancing from one position to the next as field windings are energized and de-energized in sequence. Depending on the sequence, the rotor may turn forwards or backwards, and it may change direction, stop, speed up or slow down at any time.Simple stepper motor drivers entirely energize or entirely de-energize the field windings, leading the rotor to "cog" to a limited number of positions. Microstepping drivers can proportionally.

Electric motor. made them uncompetitive—thus newer hard disk drives use voice coil-based head actuator systems. (The term "voice coil" in this connection is historic; it refers to the structure in a cone-type loudspeaker.)Stepper motors are often used in computer printers, optical scanners, and digital photocopiers to move the active element, the print head carriage (inkjet printers), and the platen or feed rollers.So-called quartz analog wristwatches contain the smallest commonplace stepping motors; they have one coil, draw little power, and have a permanent magnet rotor. The same kind of motor drives battery-powered quartz clocks. Some of these watches, such as chronographs, contain more.

Electric motor. 1978 era HP 7225A pen plotter used two linear stepper motors to move the pen along the X and Y axes.## Electromagnetism.## Force and torque.An electric motor converts electrical energy to mechanical energy through the force between two opposed magnetic fields. At least one of the two magnetic fields must be created by an electromagnet through the magnetic field caused by an electrical current.The force between a current formula_1 in a conductor of length formula_2 perpendicular to a magnetic field formula_3 may be calculated using the Lorentz force law: formula_4Note: X denotes vector cross product. The most general approaches to.

Electric motor. resistance Ir2 – square of current induced in the rotor s – motor slip; i.e., difference between synchronous speed and slip speed, which provides the relative movement needed for current induction in the rotor.## Back EMF.The movement of armature windings of a direct-current or universal motor through a magnetic field, induce a voltage in them. This voltage tends to oppose the motor supply voltage and so is called "back electromotive force (EMF)". The voltage is proportional to the running speed of the motor. The back EMF of the motor, plus the voltage drop across the winding internal resistance and brushes,.

Electric motor. enacted legislation to encourage the manufacture and use of higher-efficiency motors. Electric motors have efficiencies ranging from at least 15% for shaded pole motors, up to 98% for permanent magnet motors, with efficiency also dependent on load. Peak efficiency is usually at 75% of the rated load. So (as an example) a 10 HP motor is most efficient when driving a load that requires 7.5 HP. Efficiency also depends on motor size; larger motors tend to be more efficient. Some motors can not operate continually for more than a specified period of time (e.g. for more than an hour per.

Electric motor. run)## Goodness factor.Eric Laithwaite proposed a metric to determine the 'goodness' of an electric motor: formula_21Where: formula_22 is the goodness factor (factors above 1 are likely to be efficient) formula_23 are the cross sectional areas of the magnetic and electric circuit formula_24 are the lengths of the magnetic and electric circuits formula_25 is the permeability of the core formula_20 is the angular frequency the motor is driven atFrom this, he showed that the most efficient motors are likely to have relatively large magnetic poles. However, the equation only directly relates to non PM motors.## Performance parameters.## Torque.Electromagnetic motors derive torque.

Electric motor. from the vector product of the interacting fields. Calculating torque requires knowledge of the fields in the air gap. Once these have been established, the torque is the integral of all the force vectors multiplied by the vector's radius. The current flowing in the winding produces the fields. For a motor using a magnetic material the field is not proportional to the current.A figure relating the current to the torque can inform motor selection. The maximum torque for a motor depends on the maximum current, absent thermal considerations.When optimally designed within a given core saturation constraint and for a given.

Electric motor. active current (i.e., torque current), voltage, pole-pair number, excitation frequency (i.e., synchronous speed), and air-gap flux density, all categories of electric motors/generators exhibit virtually the same maximum continuous shaft torque (i.e., operating torque) within a given air-gap area with winding slots and back-iron depth, which determines the physical size of electromagnetic core. Some applications require bursts of torque beyond the maximum, such as bursts to accelerate an electric vehicle from standstill. Always limited by magnetic core saturation or safe operating temperature rise and voltage, the capacity for torque bursts beyond the maximum differs significantly across motor/generator types.Electric machines without a.

Electric motor. transformer circuit topology, such as that of WRSMs or PMSMs, cannot provide torque bursts without saturating the magnetic core. At that point, additional current cannot increase torque. Furthermore, the permanent magnet assembly of PMSMs can be irreparably damaged.Electric machines with a transformer circuit topology, such as induction machines, induction doubly-fed electric machines, and induction or synchronous wound-rotor doubly-fed (WRDF) machines, permit torque bursts because the EMF-induced active current on either side of the transformer oppose each other and thus contribute nothing to the transformer coupled magnetic core flux density, avoiding core saturation.Electric machines that rely on induction or asynchronous principles.

Electric motor. the air-gap area and the back-iron depth, which are determined by the power rating of the armature winding set, the speed of the machine, and the achievable air-gap flux density before core saturation. Despite the high coercivity of neodymium or samarium-cobalt permanent magnets, continuous torque density is virtually the same amongst electric machines with optimally designed armature winding sets. Continuous torque density relates to method of cooling and permissible operation period before destruction by overheating of windings or permanent magnet damage.Other sources state that various e-machine topologies have differing torque density. One source shows the following:where—specific torque density is normalized.

Electric motor. to 1.0 for the surface permanent magnet (SPM)—brushless ac, 180° current conduction.Torque density is approximately four times greater for liquid cooled motors, compared to those which are air cooled.A source comparing direct current, induction motors (IM), PMSM and SRM showed:Another source notes that PMSM up to 1 MW have considerably higher torque density than induction machines.## Continuous power density.The continuous power density is determined by the product of the continuous torque density and the constant torque speed range. Electric motors can achieve densities of up to 20KW/KG, meaning 20 Kilowatts of output power per kilogram.## Acoustic noise and vibrations.Acoustic noise.

Electric motor. and vibrations are usually classified in three sources: mechanical sources (e.g. due to bearings) aerodynamic sources (e.g. due to shaft-mounted fans) magnetic sources (e.g. due to magnetic forces such as Maxwell and magnetostriction forces acting on stator and rotor structures)The latter source, which can be responsible for the "whining noise" of electric motors, is called electromagnetically induced acoustic noise.## Standards.The following are major design, manufacturing, and testing standards covering electric motors: American Petroleum Institute: API 541 Form-Wound Squirrel Cage Induction Motors – 375 kW (500 Horsepower) and Larger American Petroleum Institute: API 546 Brushless Synchronous Machines – 500 kVA and.

Electric motor. 60072 Dimensions and output series for rotating electrical machines National Electrical Manufacturers Association: MG-1 Motors and Generators Underwriters Laboratories: UL 1004 – Standard for Electric Motors Indian Standard: IS:12615-2018 – Line Operated Three Phase a.c. Motors (IE CODE) “Efficiency Classes and Performance Specification” (Third Revision)## Non-magnetic motors.An electrostatic motor is based on the attraction and repulsion of electric charge. Usually, electrostatic motors are the dual of conventional coil-based motors. They typically require a high-voltage power supply, although small motors employ lower voltages. Conventional electric motors instead employ magnetic attraction and repulsion, and require high current at low voltages. In the.

Electric motor. produces acoustic or ultrasonic vibrations to produce linear or rotary motion. In one mechanism, the elongation in a single plane is used to make a series of stretches and position holds, similar to the way a caterpillar moves.An electrically powered spacecraft propulsion system uses electric motor technology to propel spacecraft in outer space. Most systems are based on electrically accelerating propellant to high speed, while some systems are based on electrodynamic tethers principles of propulsion to the magnetosphere. Electric generator Regenerative brake Goodness factor Motor capacitor Traction motor Motor controller Houston, Edwin J.; Kennelly, Arthur, "Recent Types of Dynamo-Electric Machinery",.


Question: What is the closest upper taxonomy of this plant?

Instruction: I want to find a paragraph from Wikipedia that answers my question about this image.

Abelia. Abelia is a previously recognized genus that contained about 30 species and hybrids, placed in the honeysuckle family, Caprifoliaceae. Molecular phylogenetic studies showed that the genus was not monophyletic, and in 2013, Maarten Christenhusz proposed the merger of "Abelia" (excluding section "Zabelia") into "Linnaea", along with some other genera. "Abelia" section "Zabelia" was raised to the genus "Zabelia".## Description.Species formerly placed in "Abelia" are shrubs from 1–6 m tall, native to eastern Asia (Japan west to the Himalaya) and southern North America (Mexico); the species from warm climates are evergreen, and colder climate species deciduous. The leaves are opposite or.


Question: What is the closest parent taxonomy of this insect?

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Epitheca princeps. Epitheca princeps, the prince baskettail, is a species of emerald dragonfly in the family Corduliidae. It is found in North America.The IUCN conservation status of "Epitheca princeps" is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017.## Subspecies.These two subspecies belong to the species "Epitheca princeps": "Epitheca princeps princeps" "Epitheca princeps regina.


Question: Where do you usually find this animal?

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Hoffmann's two-toed sloth. Hoffmann's two-toed sloth ("Choloepus hoffmanni"), also known as the northern two-toed sloth is a species of sloth from Central and South America.It is a solitary, largely nocturnal and arboreal animal, found in mature and secondary rainforests and deciduous forests. The common name commemorates the German naturalist Karl Hoffmann.## Description.Hoffmann's two-toed sloth is a heavily built animal with shaggy fur and slow, deliberate movements. The fore feet have only two toes, each ending with long, curved claws, although three clawed toes are on each of the hind feet. Other features that distinguish it from three-toed sloths, which may be found in.

Hoffmann's two-toed sloth. the same geographic areas, include the longer snout, separate rather than partially fused toes of the forefeet, the absence of hair on the soles of the feet, and larger overall size. The wrist of the sloth has developed some specific traits due to their slow, yet acrobatic motions. These evolved traits include diminution and distal migration of the pisiform bone, with a loss of contact with the ulna; reduction of the distal end of the ulna to a styloid process; and extremely reduced contact between the ulna and triquetral bone.Hoffmann's two-toed sloth is, however, much easier to confuse with the.

Hoffmann's two-toed sloth. related Linnaeus's two-toed sloth, which it closely resembles. The primary physical differences between the two species relate to subtle skeletal features; for example, Hoffmann's two-toed sloth has three foramina in the upper forward part of the interpterygoid space, rather than just two, and often – but not always – has fewer cervical vertebrae.Adults range from 54 to 72 (cm) in head-body length, and weigh from 2.1 to 9 (kg). Although they do have stubby tails, just 1.5 to 3 (cm) long, this is too short to be visible through the long fur. The claws are 5 to 6.5 (cm) long.

Hoffmann's two-toed sloth. Females are larger on average than males, although with considerable overlap in size. Their fur is tan to light brown in colour, being lighter on the face, but usually has a greenish tinge because of the presence of algae living in the hairs.Its karyotype has 2n = 49–51 and FN = 61.## Distribution and habitat.Hoffmann's two-toed sloth inhabits tropical forests from sea level to 3300 (m) above sea level. It is found in the rainforest canopy in two separate regions of Central and South America, separated by the Andes. One population is found from eastern Honduras in the north to.

Hoffmann's two-toed sloth. western Ecuador in the south, and the other in eastern Peru, western Brazil, and northern Bolivia. Based on cytochrome c oxidase subunit I sequences, a divergence date of about 7 million years between these populations has been suggested. Two-toed sloths live in the canopies in the forests of the tropical rainforests. They usually tend to be relaxing in the branches of the trees that are intertwined within each other throughout the sheltering treetops. Most of the two-toed sloths activity takes place hanging upside down but when it comes time for urination and defecation they make their way to the ground.

Hoffmann's two-toed sloth. These creatures also come to the ground when in need of a new tree to live upon or to discover a new food source ## Subspecies.The five recognised subspecies of "C. hoffmanni" are:"C. h. hoffmanni", – Honduras, Nicaragua, Costa Rica, Panama"C. h. agustinus", – Venezuela, western Colombia, northern Ecuador"C. h. capitalis", – western Ecuador"C. h. juruanus", – Brazil, Bolivia, extreme eastern Peru"C. h. pallescens", – Peru## Behavior.Two-toed sloths spend most of their time in trees, though they may travel on the ground to move to a new tree. A study of sloths on Barro Colorado Island indicated that the Hoffmann's.

Hoffmann's two-toed sloth. the same time.The name "sloth" means "lazy", but the slow movements of this animal are actually an adaptation for surviving on a low-energy diet of leaves. These sloths have half the metabolic rate of a typical mammal of the same size. Sloths have very poor eyesight and hearing, and rely almost entirely on their senses of touch and smell to find food.This species often exhibits exaggerated wobbling of the head. Another trait of this sloth is it often spits when the mouth opens. The saliva often accumulates on the lower lip, giving the creature a comical appearance.Two-toed sloths hang from.

Hoffmann's two-toed sloth. tree branches, suspended by their huge, hook-like claws. The clinging behaviour is a reflex action, and sloths are found still hanging from trees after they die. The sloth spends almost its entire life, including eating, sleeping, mating, and giving birth, hanging upside down from tree branches. Usually, sloths are found right side up when they descend to the ground to defecate, which they usually do about once every three to eight days. They will also ground themselves to urinate, change trees if they wish, or mate, as well as give birth. While terrestrial locomotion is usually thought to involve the.

Hoffmann's two-toed sloth. sloth lying on the ground and pulling themselves forward, they have actually been seen walking on their palms and soles.Sloths descend about once every eight days to defecate on the ground. The reason and mechanism behind this behavior have long been debated among scientists. There are at least five hypotheses: 1) fertilize trees when feces are deposited at the base of the tree; 2) cover feces and avoid predation; 3) chemical communication between individuals; 4) pick up trace nutrients in their claws, that are then ingested and 5) favor a mutualistic relationship with populations of fur moths. More recently, a.

Hoffmann's two-toed sloth. new hypothesis has emerged, which presents evidence against the previous ones and proposes that all current sloths are descendants from species that defecated on the ground, and there simply has not been enough selective pressure to abandon this behavior, since cases of predation during defecation are actually very rare.Sloths have many predators, including the jaguars, ocelots, harpy eagles, margays, and anacondas. If threatened, sloths can defend themselves by slashing out at a predator with their huge claws or biting with their sharp cheek teeth. However, a sloth's main defense is to avoid being attacked in the first place. The two-toed.

Hoffmann's two-toed sloth. sloth can survive wounds that would be fatal to another mammal its size. The sloth's slow, deliberate movements and algae-covered fur make them difficult for predators to spot from a distance. Their treetop homes are also out of reach for many larger predators.Their long, coarse fur also protects them from sun and rain. Their fur, unlike other mammals, flows from belly to top, not top to belly, allowing rainwater to slide off the fur while the animal is hanging upside down.Hoffmann's two-toed sloth inhabits a range of different trees within its habitat, although it seems to prefer those with plentiful.

Hoffmann's two-toed sloth. lianas and direct sunlight. They have a typical home range of about 2 to 4 (ha), and may spend most of their lives travelling between just 25 or so trees.## Life history.Courtship consists of the female licking the male's face and rubbing her genitals against the male's body. Gestation lasts between 355 and 377 days, and results in the birth of a single young. The birth takes place on either the ground or in the hanging position. Newborn sloths weigh 340 to 454 (g), and are precocial, already possessing long claws and able to cling to their mothers' undersides. They.

Hoffmann's two-toed sloth. begin to take solid food at 15 to 27 days, and are fully weaned by 9 weeks. Although relatively quiet as adults, young sloths make loud bleating alarm calls if separated from their mothers.In captivity, the two-toed sloth was seen giving birth by hanging upside down and attempting to pull the infant between her hind limbs and onto her abdomen. Other sloths were seen hanging under the mother and infant to protect the infant from falling.Hoffmann's two-toed sloths reach sexual maturity at two to four years of age and have been reported to live up to 43 years in captivity.##.

Hoffmann's two-toed sloth. a sloth's weight may be the leaves in its digestive system.## Conservation status.Habitat destruction is probably causing a decrease in the wild Hoffmann's two-toed sloth population, but little reliable data is available on the number of wild individuals. Sloths and people have little contact with one another in the wild.## Reproduction.The reproduction process of the two-toed sloths has some differences when compared to the three-toed sloths. Two toed sloths tend to mate all year around; they don’t really go by a schedule. If they had to pick the most popular season to mate it would be during rainy seasons and.

Hoffmann's two-toed sloth. are sexually matured by the age 3 and are ready to start reproducing of their own.## Adaptation.Sloths are known to be heterothermic, meaning that whatever environment they’re in, they learn to adapt. Their body temperature ranges from 86-93 degrees Fahrenheit (about 30 to 34 degrees Celsius), which, compared to other mammals is on the cold side. Having these low temperatures helps the sloths conserve their energy. Sloths fur is grown specifically for a job which is to grow algae. The algae grows within their hair shaft and benefits the creatures camouflaging techniques. The hair grows in a special system of.


Question: What is the closest parent taxonomy of this bird?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Crested lark. The crested lark (Galerida cristata) is a species of lark widespread across Eurasia and northern Africa. It is a non-migratory bird, but can occasionally be found as a vagrant in Great Britain.## Taxonomy and systematics.The crested lark was one of the many species originally described by Carl Linnaeus in his landmark 1758 10th edition of "Systema Naturae". It was classified in the genus "Alauda" until German naturalist Friedrich Boie placed it in the new genus "Galerida" in 1821. Colin Harrison recommended lumping members of "Galerida" and "Lullula" back into "Alauda" in 1865 due to a lack of defining characteristics. The.

Crested lark. current scientific name is derived from Latin. "Galerida" was the name for a lark with a crest, from "galerum", "cap", and "cristata" means "crested". Alban Guillaumet and colleagues noted the distinctiveness of populations from the Maghreb - birds in the dryer parts of Morocco and Tunisia had longer bills while those in more coastal northern parts had shorter bills typical of the European subspecies. The authors sampled the mitochondrial DNA and found they were distinct genetically.Formerly, the Maghreb lark was considered as a subspecies of the crested lark.## Subspecies.Thirty-three subspecies are recognized: Iberian crested lark ("G. c. pallida") - :.


Question: What is the location of this building?

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Venetian Towers. The Venetian Towers (in Catalan: "Torres Venecianes") is the popular name for a pair of towers on Avinguda de la Reina Maria Cristina at its junction with Plaça d'Espanya in Barcelona, Catalonia, Spain. There is one tower on either side of the street.The towers are 47m high, with a 7.2 metres square cross-section. The bottom section of each is built of artificial stone, the main section of red brick, and the top section is a colonnaded viewing gallery built of artificial stone, and topped by a pyramidal copper roof. They were modelled on the campanile of St. Mark's Basilica in.


Question: What product does this object produce?

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Macramé. Macramé is a form of textile produced using knotting (rather than weaving or knitting) techniques.The primary knots of macramé are the square (or reef knot) and forms of "hitching": various combinations of half hitches. It was long crafted by sailors, especially in elaborate or ornamental knotting forms, to cover anything from knife handles to bottles to parts of ships.Cavandoli macramé is one variety that is used to form geometric and free-form patterns like weaving. The Cavandoli style is done mainly in a single knot, the double half-hitch knot. Reverse half hitches are sometimes used to maintain balance when working left.

Macramé. and right halves of a balanced piece.Leather or fabric belts are another accessory often created via macramé techniques. Most friendship bracelets exchanged among schoolchildren and teens are created using this method. Vendors at theme parks, malls, seasonal fairs and other public places may sell macramé jewelry or decoration as well.## History.One of the earliest recorded uses of macramé-style knots as decoration appeared in the carvings of the Babylonians and Assyrians. Fringe-like plaiting and braiding adorned the costumes of the time and were captured in their stone statuary.Arab weavers knotted excess thread along the edges of hand-loomed fabrics such as towels,.

Macramé. shawls, and veils into decorative fringes. The word "macramé" is derived from the Arabic "macramia" (), believed to mean "striped towel", "ornamental fringe" or "embroidered veil". Another school of thought indicates that it comes from Turkish "makrama", "napkin" or "towel". The decorative fringes also helped to keep flies off camels and horses in northern Africa.The Moorish conquest took the craft to Spain, then Italy, especially in the region of Liguria, then it spread through Europe. In England, it was introduced at the court of Mary II in the late 17th century. Queen Mary taught it to her ladies-in-waiting.Macramé was most.

Macramé. popular in the Victorian era. It adorned most homes in items such as tablecloths, bedspreads and curtains. The popular "Sylvia's Book of Macramé Lace" (1882) showed how "to work rich trimmings for black and coloured costumes, both for home wear, garden parties, seaside ramblings, and balls—fairylike adornments for household and underlinens ...".It was a specialty in Genoa, and was popular in the 19th century. There, "Its roots were in a 16th-century technique of knotting lace known as "punto a groppo"" Sailors made macramé objects while not busy at sea, and sold or bartered them when they landed. Nineteenth-century British and.

Macramé. American sailors made hammocks, bell fringes, and belts from macramé. They called the process "square knotting" after the knot they used most often. Sailors also called macramé "McNamara's lace".Macramé's popularity faded, but resurged in the 1970s for making wall hangings, clothing accessories, small jean shorts, bedspreads, tablecloths, draperies, plant hangers and other furnishings. Macramé jewelry became popular in America. Using mainly square knots and granny knots, this jewelry often features handmade glass beads and natural elements such as bone and shell. Necklaces, anklets and bracelets have become popular forms of macramé jewelry. By the early 1980s, macramé again began to.

Macramé. fall out of fashion, only to be revived by millennials.## Materials and process.Materials used in macramé include cords made of cotton twine, linen, hemp, jute, leather or yarn. Cords are identified by construction, such as a 3-ply cord, made of three lengths of fibre twisted together. Jewelry is often made in combination of both the knots and various beads (of glass, wood, and so on), pendants or shells. Sometimes 'found' focal points are used for necklaces, such as rings or gemstones, either wire-wrapped to allow for securing or captured in a net-like array of intertwining overhand knots. A knotting board.

Macramé. is often used to mount the cords for macramé work. Cords may be held in place using a C-clamp, straight pins, T-pins, U-pins, or upholstery pins.For larger decorative pieces, such as wall hangings or window coverings, a work of macramé might be started out on a wooden or metal dowel, allowing for a spread of dozens of cords that are easy to manipulate. For smaller projects, push-pin boards are available specifically for macramé, although a simple corkboard works adequately. Many craft stores offer beginners' kits, work boards, beads and materials ranging in price for the casual hobbyist or ambitious crafter.