Question: What event does this building commemorate?

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Monument to the Great Fire of London. The Monument to the Great Fire of London, more commonly known simply as the Monument, is a fluted Doric column in London, England, situated near the northern end of London Bridge. Commemorating the Great Fire of London, it stands at the junction of Monument Street and Fish Street Hill, 202 (ft) in height and 202 feet west of the spot in Pudding Lane (although this is thought to be wrong as historic blueprints show it started next door) where the Great Fire started on 2 September 1666. Constructed between 1671 and 1677, it was built on the site of St.

Monument to the Great Fire of London. Margaret, New Fish Street, the first church to be destroyed by the Great Fire. It is Grade I-listed and is a scheduled monument. Another monument, the Golden Boy of Pye Corner, marks the point near Smithfield where the fire was stopped.The Monument comprises a Doric column built of Portland stone topped with a gilded urn of fire. It was designed by Christopher Wren and Robert Hooke. Its height marks its distance from the site of the shop of Thomas Farriner (or Farynor), the king's baker, where the blaze began.The viewing platform near the top of the Monument is reached by.

Monument to the Great Fire of London. a narrow winding staircase of 345 steps. A mesh cage was added in the mid-19th century to prevent people jumping to the ground, after six people died by suicide there between 1788 and 1842.Three sides of the base carry inscriptions in Latin. The one on the south side describes actions taken by King Charles II following the fire. The inscription on the east side describes how the Monument was started and brought to perfection, and under which mayors. Inscriptions on the north side describe how the fire started, how much damage it caused, and how it was eventually extinguished. The.

Monument to the Great Fire of London. Latin words "Sed Furor Papisticus Qui Tamdiu Patravit Nondum Restingvitur" (but Popish frenzy, which wrought such horrors, is not yet quenched) were added to the end of the inscription on the orders of the Court of Aldermen in 1681 during the foment of the Popish Plot. Text on the east side originally falsely blamed Roman Catholics for the fire ("burning of this protestant city, begun and carried on by the treachery and malice of the popish faction"), which prompted Alexander Pope (himself a Catholic) to say of the area:The words blaming Catholics were chiselled out with Catholic Emancipation in 1830.The.

Monument to the Great Fire of London. west side of the base displays a sculpture, by Caius Gabriel Cibber, in alto and bas relief, of the destruction of the City; with Charles II and his brother, James, the Duke of York (later King James II), surrounded by liberty, architecture, and science, giving directions for its restoration.It gives its name to the nearby London Underground station, Monument.## History.The first Rebuilding Act, passed in 1669, stipulated that "the better to preserve the memory of this dreadful visitation", a column of either brass or stone should be set up on Fish Street Hill, on or near the site of Farynor's.

Monument to the Great Fire of London. bakery, where the fire began. Christopher Wren, as surveyor-general of the King's Works, was asked to submit a design. Wren worked with Robert Hooke on the design. It is impossible to know the extent of the collaboration between Hooke and Wren, but Hooke's drawings of possible designs for the column still exist, with Wren's signature on them indicating his approval of the drawings rather than their authorship. It was not until 1671 that the City Council approved the design, and it took six years to complete the 202 (ft) column. It was two more years before the inscription (which had.

Monument to the Great Fire of London. been left to Wren—or to Wren's choice—to decide upon) was set in place. "Commemorating—with a brazen disregard for the truth—the fact that 'London rises again...three short years complete that which was considered the work of ages.Hooke's surviving drawings show that several versions of the monument were submitted for consideration: a plain obelisk, a column garnished with tongues of fire, and the fluted Doric column that was eventually chosen. The real contention came with the problem of what type of ornament to have at the top. Initially, Wren favoured a statue of a phoenix with outstretched wings rising from the ashes,.

Monument to the Great Fire of London. but as the column neared completion he decided instead on a 15 (ft) statue either of Charles II, or a sword-wielding female to represent a triumphant London; the cost of either being estimated at £1,050. Charles himself disliked the idea of his statue atop the monument and instead preferred a simple copper-gilded ball "with flames sprouting from the top", costing a little over £325, but ultimately it was the design of a flaming gilt-bronze urn suggested by Robert Hooke that was chosen.The total cost of the monument was £13,450 11"s" 9"d.", of which £11,300 was paid to the mason-contractor Joshua.

Monument to the Great Fire of London. Marshall. (Joshua Marshall was Master of the Masons' Company in 1670.)The Edinburgh-born writer James Boswell visited the Monument in 1763 to climb the 311 steps to what was then the highest viewpoint in London. Halfway up, he suffered a panic attack, but persevered and made it to the top, where he found it "horrid to be so monstrous a way up in the air, so far above London and all its spires".The area around the base of the column, Monument Street, was pedestrianised in 2006 in a £790,000 street improvement scheme.The Monument closed in July 2007 for an 18-month, £4.5.

Monument to the Great Fire of London. million refurbishment project and re-opened in February 2009.Between 1 and 2 October 2011, a Live Music Sculpture created especially for the Monument by British composer Samuel Bordoli was performed 18 times during the weekend. This was the first occasion that music had ever been heard inside the structure and effectively transformed Wren's design into a gigantic reverberating musical instrument.## As a scientific instrument.Wren and Hooke built the monument to double-up as a scientific instrument. It has a central shaft meant for use as a zenith telescope and for use in gravity and pendulum experiments that connects to an underground laboratory.

Monument to the Great Fire of London. for observers to work (accessible through a hatch in the floor of the present-day ticket booth). Vibrations from heavy traffic on Fish Street Hill rendered the experimental conditions unsuitable.At the top of the monument, a hinged lid in the urn covers the opening to the shaft. The steps in the shaft of the tower are all 6 (in) high, allowing them to be used for barometric pressure studies.In a study published in 2020, researchers from Queen Mary University of London used the shaft of the monument stairwell to measure deformation in a hanging wire. By twisting and untwisting a wire.

Monument to the Great Fire of London. hanging down the shaft of the stairwell, they were able to detect deformation at less than 9 parts per billion—equivalent to a one-degree twist over the length of the 50 (metre) wire.## Panoramic camera system.During the 2007–2009 refurbishment, a 360-degree panoramic camera was installed on top of the Monument. Updated every minute and running 24 hours a day, it provides a record of weather, building and ground activity in the City.## Monument Square.The Monument stands in Monument Square, formerly known as Monument Yard which was merged into Monument Street in 1911, created as part of the pedestrianisation of Monument Street.

Monument to the Great Fire of London. It sits on the east side of Fish Street Hill, and extends to Pudding Lane. A glass pavilion, designed by Bere Architects, was unveiled on 31 January 2007. William Godwin, in his novel "Deloraine" (1833), suggests that, like "the man we are told of, who climbed over the rails at the top of the Monument of London, and clung to them for a while on the outside, there was not room for repentance", meaning that there was no way for the hero, who has just killed his rival, to go back (147). Charles Dickens, in his novel "Martin Chuzzlewit", published.

Monument to the Great Fire of London. in 1844, describes the Monument thus: The Monument is a prominent setting in "The System of the World", the third book in Neal Stephenson's "Baroque Cycle". George, the hero of Charlie Fletcher's children's book about unLondon "Stoneheart", has a fight at the top of the Monument with a raven and a gargoyle. In Robert J. Lloyd's mystery novel "The Bloodless Boy", Robert Hooke (designer of the Monument with Christopher Wren), investigates the sinister death of a blood-drained boy discovered on the banks of the River Fleet. Hooke's assistant, Harry Hunt, witnessing another murder, is chased up to the top of.

Monument to the Great Fire of London. the monument. The Monument's viewing platform features in the 1970 film "The Man Who Haunted Himself" where Roger Moore's character, Harold Pelham, meets a company rival for a secret meeting prior to a company takeover.## In fiction.In the 2022 novel, The Pox Academy, by Warren Mead, the main characters fight an epic battle in the Monument. They end up in a secret nightclub underneath the Monument which is controlled by the league of Fire Witches. History of London Godwin, William. "Deloraine" in "Collected Novels and Memoirs of William Godwin" vol. 8, ed. Maurice Hindle. London: William Pickering, 1992. Hart, V.,.

Monument to the Great Fire of London. 'London’s Standard: Christopher Wren and the Heraldry of the Monument’, in "RES: Journal of Anthropology and Aesthetics", vol.73/74, Autumn 2020, pp. 325–39 Hart, V., "Christopher Wren: In Search of Eastern Antiquity" (Yale University Press, 2020) Jardine, L., "On a Grander Scale: The Outstanding Career of Sir Christopher Wren" ( hardback, paperback) Official Monument website City of London Monument pageHistory of The Monument with some account of the great fire of London, which it commemorates (1921), by Charles Welch3D photoscan of the base or the Monument showing Latin inscription.


Question: What is the location of this place?

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Histria (ancient city). establishment, with fishing and agriculture as additional sources of income. By 100 AD, however, fishing had become the main source of Istrian revenue.Around 30 AD, Histria came under Roman domination. During the Roman period from the 1st to 3rd centuries AD, temples were built for the Roman gods, besides a public bath and houses for the wealthy. Altogether, it was in continuous existence for some 14 centuries, starting with the Greek period up to the Roman-Byzantine period. The Halmyris bay where was the city founded was closed by sand deposits and access to the Black Sea gradually was cut. Trade.

Histria (ancient city). continued until the 6th century AD. The invasion of the Avars and the Slavs in the 7th century AD almost entirely destroyed the fortress, and the Istrians dispersed; the name and the city disappeared.## Geographic setting.Ancient Histria was situated on a peninsula, about 5 (km) east of the modern Romanian commune of Istria, on the Dobruja coast. The ancient seashore has since been transformed into the western shore of Sinoe Lake, as the Danube's silt deposits formed a shoal which closed off the ancient coastline. The current Sinoe Lake was at the time the open northern bay, while another bay.

Histria (ancient city). Mangalia) over Tomis "emporion" (Εμπόριον, market) (i.e. modern Constanţa). Another destruction of the city, somewhere around 175 BC, was most probably wreaked by Bastarni passing through after being called upon by Macedonian king Philip V or Perseus to reinforce the army.## Hellenistic layer III (175–100 BC).Mithridates installed a military garrison in Histria, which probably caused the third destruction of the city in the Hellenistic period. During the rule of Mithridates staters are minted in Histria.## Hellenistic layer IV (100–20 BC).Burebista arrived in Dobruja. (Gaius Antonius Hybrida)...while governor of Macedonia, had inflicted many injuries upon the subject territory as well as.

Histria (ancient city). upon that which was in alliance with Rome, and had suffered many disasters in return. 2 For after ravaging the possessions of the Dardanians and their neighbours, he did not dare to await their attack, but pretending to retire with his cavalry for some other purpose, took to flight; in this way the enemy surrounded his infantry and forcibly drove them out of the country, even taking away their plunder from them. 3 When he tried the same tactics on the allies in Moesia, he was defeated near the city of the Istrians by the Bastarnian Scythians who came to.


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

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Diamondback moth. The diamondback moth ("Plutella xylostella"), sometimes called the cabbage moth, is a moth species of the family Plutellidae and genus "Plutella". The small, grayish-brown moth sometimes has a cream-colored band that forms a diamond along its back. The species may have originated in Europe, South Africa, or the Mediterranean region, but it has now spread worldwide.The moth has a short life cycle (14 days at 25 °C), is highly fecund, and is capable of migrating long distances. Diamondback moths are considered pests as they feed on the leaves of cruciferous crops and plants that produce glucosinolates. However, not all of.

Diamondback moth. tips of the wings can be seen to turn upward slightly when viewed from the side. The antennae are pronounced. The adults of this species are visually identical to the adults of the New Zealand endemic moth "Plutella antiphona." ## Geographic range.The diamondback moth has a global distribution and is found in Europe, Asia, Africa, the Americas, Australia, New Zealand, and the Hawaiian Islands. It is said by some experts to be the most widely distributed of all Lepidoptera, but despite tremendous interest in limiting the damage it causes, the actual available data is inadequate. It probably originated in Europe,.

Diamondback moth. can effectively slow the encroachment of the resistant diamondback moth.## Potential biological control options.1. Introduction of natural enemies which feed on the larvae, thereby reducing numbers. Although they usually only have a noticeable effect in the later stages of crop growth and can kill up to 70% of their prey. Wasps and spiders are considered common predators. The introduction of natural predators can be one of the most effective ways of both stabilizing ecosystems and managing pests.2. The homologous gene of "Plutella xylostella" was knocked out i.e. changed. This is a genetically-based approach that requires precise research to identify suitable.

Diamondback moth. active at dusk or at night, when the insecticide is most effective. In addition, avoiding coverage of flowering crops can minimize damage to bees and other pollinated insects. Ntonifor et al 2002 finds "Piper guineense" extract to be highly effective in "Brassica" crops. diamondback moth on the UF / IFAS Featured Creatures Web site "Plutella xylostella" (Linnaeus, 1758) Diamond Back or Cabbage Moth Coffs Harbour Butterfly House, NSW, Australia. Updated January 2014 R. Srinivasan; Anthony M. Shelton; Hilda L. Collins (1 April 2011), The Sixth International Workshop on Management of the Diamondback Moth and Other Crucifer Insect Pests. AVRDC-WorldVegetableCenter. Download.


Question: What is the parent organization of this aircraft?

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Dornier Flugzeugwerke. produced by HAL with plans to build 20 more during 2013-14.In 1985, Dornier became a member of the Daimler-Benz group, integrating its aeronautic assets with the parent company. As part of this transaction, Lindauer Dornier GmbH was spun off, creating a separate, family-owned firm, concentrating on textile machinery design and manufacturing. The rest of the company was split into several subsidiaries for defence, satellites, medtech and aircraft.In 1996, the majority of Dornier Aircraft was acquired by Fairchild Aircraft, forming Fairchild Dornier. This company became insolvent in early 2002. Production of its 328 Jet was acquired by US company Avcraft. Asian.


Question: Which location has this bird invaded?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Egyptian goose. The Egyptian goose (Alopochen aegyptiaca) is a member of the duck, goose, and swan family Anatidae. It is native to Africa south of the Sahara and the Nile Valley.Egyptian geese were considered sacred by the Ancient Egyptians, and appeared in much of their artwork. Because of their popularity chiefly as an ornamental bird, escapees are common and feral populations have become established in Western Europe, the United States, and New Zealand.## Taxonomy.The Egyptian goose is believed to be most closely related to the shelducks (genus "Tadorna") and their relatives, and is placed with them in the subfamily Tadorninae. It is.

Egyptian goose. grass and suitable nesting locations (either islands, holes in old trees or amongst epicormic shoots on old trees). During the winter, they are widely dispersed within river valleys, where they feed on short grass and cereals. In the United Kingdom in 2009, it was officially declared a non-native species. Accordingly, Egyptian geese in Great Britain may be shot without special permission if they cause problems.In Europe, the species has been included since 2017 in the list of Invasive Alien Species of Union concern (the Union list). This implies that this species cannot be imported, bred, transported, commercialized, used, exchanged or.


Question: What is the conservation status of this insect? (The status is assigned by the international union for conservation of nature. Choose one among Endangered,Least Concern,Critically Endangered,extinct species,extinct in the wild,Vulnerable,Near Threatened,Data Deficient).

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Dythemis nigrescens. Dythemis nigrescens, the black setwing, is a species of skimmer in the dragonfly family Libellulidae. It is found in Central America and North America.The IUCN conservation status of "Dythemis nigrescens" is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017.


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

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Olive-sided flycatcher. The olive-sided flycatcher ("Contopus cooperi") is a small to medium sized passerine bird in the family Tyrannidae, the Tyrant flycatcher family. It is a migratory species that travels from South to North America to breed during the summer. It is a very agile flyer and mainly consumes flying insects on flight. Since 2016, this species has been assessed as being near-threatened globally (IUCN) and threatened in Canada (SRA) due to its declining populations.## Description.## Identification.Olive-sided flycatchers are migratory songbirds which are relatively small. It is qualified as small to medium-sized birds and are estimated to be smaller than American robins,.

Olive-sided flycatcher. species does not exhibit sexual dimorphism, which means that male and female look similar. Olive-sided flycatchers perch in upright positions on top of dead branches or trees.## Similar species.Olive-sided flycatchers can be confused with other birds in the genus "Contopus" like the Greater Pewee, Western Wood-Pewee, Eastern Wood-Pewee, and the Eastern Phoebe. They can be distinguished these species by observing the following differences: the plain grey breasts of the greater pewee (as opposed to the vest-like chest of the olive-sided flycatcher), they are twice the weight of the western and eastern wood pewees, and the eastern phoebe has more white.

Olive-sided flycatcher. underparts than the olive-sided flycatcher.## Taxonomy.Olive-sided flycatchers ("Contopus cooperi") are part of the class Aves in the order Passeriformes, meaning they are passerines which are known as perching or song birds. They are part of the family Tyrannidae because they are Tyrant flycatchers found in America and they belong to the genus Contopus which is the Pewee taxon. Pewees are known as being insect eaters who catch their prey generally in flight.## Distribution and habitat.The olive-sided flycatcher is distributed throughout North and South America. Its breeding habitat ranges from California to New Mexico, all the way up to central Alaska,.

Olive-sided flycatcher. III, T.A. (1993) "Olive-sided Flycatchers in Southeastern Brazil" Wilson Bulletin 105(1): Olive-sided flycatcher - "Contopus cooperi" – USGS Patuxent Bird Identification InfoCenter Olive-sided flycatcher species account – Cornell Lab of Ornithology Olive-sided flycatcher song Merlin Bird ID – The Cornell Lab of Ornithology eBird olive-sided flycatcher ID Olive-sided flycatcher eating a bee.


Question: Which maintenance method is used for this place?

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Road. a road for the environment in order to extend its longevity and reduce maintenance. The Shell pavement design method is used in many countries for the design of new asphalt roadsides.Adverse camber: Where a road slopes towards the outside of a bend, increasing the likelihood that vehicles travelling at speed will skid or topple. Usually only a temporary situation during road maintenance.Alignment: The route of the road, defined as a series of horizontal tangents and curves.All-weather road: Unpaved road that is constructed of a material that does not create mud during rainfall.Banked turnBelisha Beacon: An orange globe, lit at night,.

Road. drivers pay an average of $746/year on vehicle repairs while the average US motorist pays about $335/year. In contrast, the average motorist pays about $171/year in road maintenance taxes (based on 600 gallons/year and $0.285/gallon tax).## Slab stabilization.Distress and serviceability loss on concrete roads can be caused by loss of support due to voids beneath the concrete pavement slabs. The voids usually occur near cracks or joints due to surface water infiltration. The most common causes of voids are pumping, consolidation, subgrade failure and bridge approach failure. Slab stabilization is a non-destructive method of solving this problem and is usually.


Question: What is the hymenium type of this plant?

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Morchella esculenta. are ellipsoidal, smooth, thin-walled, translucent (hyaline), and measure 17.5–21.9 by 8.8–11.0 µm. The asci are eight-spored, 223–300 by 19–20 µm, cylindrical, and hyaline. The paraphyses are filamentous, cylindrical, 5.8–8.8 µm wide, and hyaline.The hyphae of the stem are interwoven, hyaline, and measure 5.8–9.4 µm wide. The surface hyphae are inflated, spherical to pear-shaped, 22–44 µm wide, covered by a network of interwoven hyphae 11–16.8 µm wide with recurved cylindrical hyphal ends.## Development.Fruit bodies have successfully been grown in the laboratory. R. Ower was the first to describe the developmental stages of ascomata grown in a controlled chamber. This was followed.


Question: What country does this building belong to?

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

Meycauayan Church. The Saint Francis of Assisi Parish Church, commonly known as the Meycauayan Church or Simbahan sa Bayan, is a Roman Catholic church located in Meycauayan, Philippines. It is one of the oldest parishes in Bulacan which even predates the Malolos Cathedral established in 1580 and the Barasoain Church established in 1859. It is also the province's largest parish with an estimated population of about 80,000 parishioners. The church is the seat of the vicariate of St. Francis of Assisi in the Diocese of Malolos.## History.## Parish foundation.The parish was founded in 1578 by Fr. Juan de Plasencia and Fr. Diego.

Meycauayan Church. de Oropeza, the first batch of Franciscan priests to reach the Philippines in 1577. They built a small church made of nipa thatch and bamboo in a small area called "Sitio Torril", which is now part of Brgy. Bahay Pare in Meycauayan. The church was blown by a typhoon in 1588.The Franciscans also brought a wooden missionary cross when they arrived in Meycauayan, similar to Magellan's Cross. The cross was later found to be in the possession of a resident of Brgy. Bahay Pare. [The cross, now known as The Cross of Sitio Torril, is probably the oldest known religious.

Meycauayan Church. with hewn-stones by Fray Jose Cantos.In 1800, the bell tower was constructed by order of Fr. Francisco Gascueña, OFM. The said tower is one of the two of its kind in the Philippines with a large arch bridge connecting the church and the tower. The tower belfry housed five bells named "Maria Concepcion", the biggest, which was made by order of Fr. Antonio de Guadalajara in 1878; the "San Francisco", dedicated to the town's patron saint made by the order of Fr. Juan Fernandez in 1881; "San Jose", the smallest made by the order of Fr. Francisco Gascuena; and two.

Meycauayan Church. others.As a result of a furious typhoon, the entire town got flooded in 1802, causing much damages that the value of a sack of rice reached four pesos with four "reales" the following year. After this crisis, Fr. Gascueña managed to construct the narthex (an arch made of stone sustaining the choir) in 1804. Through the span of thirty-one years, Fr. Gascueña has showed all the kind virtues and charity to the poor, to whom he never denied alms whether they may be their parishioner or from other towns. He died in Meycauayan on November 18, 1831 and was buried.

Meycauayan Church. was constructed in 1880. The church-convent complex was seriously damaged by a strong typhoon in 1882.## Secularization.The first native clergyman to be assigned as parish priest in Meycauayan was Fr. Esteban Daez, a native of Polo, Obando, Bulacan. He was a coadjutor priest in 1892 before he became the "cura parroco interino" (interim parish priest) from 1898 to 1900.## American occupation.Both the Meycauayan Church and convent were occupied and became the temporary headquarters of the American soldiers in May 1899 after it was captured from the Filipinos revolutionaries during the Philippine–American War. Some of the church possessions were believed destroyed.

Meycauayan Church. or looted during their stay in the church complex. Following its return to the Catholic Church in 1903, a claim was filed by the Catholic Church in the Philippines to be paid by the United States of America regarding the church properties occupied, damaged or otherwise destroyed by American troops from 1899 to 1903 that amounted to 2,200 pesos with a monthly rental of 50 pesos for the convent-turned-to-headquarters.## Post War.During World War II, the church survived destruction unlike the churches in Manila. In 1946, then future President Diosdado Macapagal and former Dr. Evangelina Macaraeg were wed at the church.

Meycauayan Church. and his wife traveled to Omaha to formally receive the artifact from Sister Judith Frikker, President of the Sisters of Mercy West Midwest Community. Foreign Affairs Secretary Albert Del Rosario turned over the Philippine–American War artifact to Director Jeremy Barns of the National Museum of the Philippines on March 9, 2012. The Roman Catholic Diocese of Malolos received the bells on August 6, 2012 and became part of the Diocesan Museum.Huerta, Fr. Felix (1865). "Estado geográfico, topográfico, estadístico, histórico-religioso de la santa y apostólica provincia de S. Gregorio Magno". Imprenta de N. Sanchez, Binondo, Manila."N. S. P. SAN FRANCISCO DE.


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

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

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: Which city or region does this harbour locate in?

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

Bristol Harbour. Bristol Harbour is the harbour in the city of Bristol, England. The harbour covers an area of 70 (acre). It is the former natural tidal river Avon through the city but was made into its current form in 1809 when the tide was prevented from going out permanently. A tidal by-pass was dug for 2 miles through the fields of Bedminster for the river, known as the "River Avon New Cut", "New Cut", or simply "The Cut". It is often called the Floating Harbour as the water level remains constant and it is not affected by the state of the.

Bristol Harbour. tide on the river in the Avon Gorge, The New Cut or the natural river southeast of Temple Meads to its source.Netham Lock at the east end of the 1809 Feeder Canal is the upstream limit of the floating harbour. Beyond the lock is a junction: on one arm the navigable River Avon continues upstream to Bath, and on the other arm is the tidal natural River Avon. The first 1 (mi) of the floating harbour, downstream from Netham Lock to Totterdown Basin, is an artificial canal known as the Feeder Canal, while the tidal River Avon follows its original.

Bristol Harbour. route. Downstream of Totterdown Basin, the floating harbour occupies the former natural course of the River Avon, whilst the tidal River Avon flows through an artificial channel known as the New Cut. This separation of the floating harbour and the tidal River Avon allows boats in the harbour to remain floating at low tide, reduces currents and silting and prevents flooding.Between Bristol Temple Meads railway station and Hotwells, the harbour and the River Avon run parallel at a distance of no more than 5/8 (mi) apart. Downstream of Bristol Temple Meads railway station, the floating harbour meanders through Bristol city.

Bristol Harbour. centre, Canon's Marsh and Hotwells. At Hotwells, the floating harbour rejoins the tidal River Avon, via a series of locks, and flows into the Avon Gorge.Bristol Harbour was the original Port of Bristol, but as ships and their cargo have increased in size, it has now largely been replaced by docks at Avonmouth and Portbury. These are located 7 (mi) downstream at the mouth of the River Avon.## History of Bristol docks.Bristol grew up on the banks of the Rivers Avon and Frome. Since the 13th century, the rivers have been modified for use as docks including the diversion of.

Bristol Harbour. the River Frome in the 1240s into an artificial "deep channel" known as "Saint Augustine's Reach", which flowed into the River Avon. Saint Augustine's Reach became the heart of Bristol's docks with its quays and wharfs. The River Avon within the gorge, and the River Severn into which it flows, has tides which fluctuate about 30 (ft) between high and low water. This means that the river is easily navigable at high tide but reduced to a muddy channel at low tide in which ships would often run aground. Ships had no option but to be stranded in the harbour.

Bristol Harbour. for unloading, giving rise to the phrase "shipshape and Bristol fashion" to describe how ships and their secured cargo were capable of taking the strain of repeated strandings on the mud.As early as 1420, vessels from Bristol were regularly travelling to Iceland and it is speculated that sailors from Bristol had made landfall in the Americas before Christopher Columbus or John Cabot. After Cabot arrived in Bristol, he proposed a scheme to the king, Henry VII, in which he proposed to reach Asia by sailing west across the north Atlantic. He estimated that this would be shorter and quicker than.

Bristol Harbour. Columbus' southerly route. The merchants of Bristol, operating under the name of the Society of Merchant Venturers, agreed to support his scheme. They had sponsored probes into the north Atlantic from the early 1480s, looking for possible trading opportunities. In 1552 Edward VI granted a Royal Charter to the Merchant Venturers to manage the port.By 1670, the city had 6,000 tons of shipping, of which half was used for importing tobacco. By the late 17th century and early 18th century, this shipping was also playing a significant role in the slave trade.## Construction of the floating harbour.In the 18th century,.

Bristol Harbour. the docks in Liverpool grew larger and so increased competition with Bristol for the tobacco trade. Coastal trade was also important, with the area called "Welsh Back" concentrating on trows with cargoes from the slate industry in Wales, stone, timber and coal. The limitations of Bristol's docks were causing problems to business, so in 1802 William Jessop proposed installing a dam and lock at Hotwells to create the harbour. The £530,000 scheme was approved by Parliament, and construction began in May 1804. The scheme included the construction of the Cumberland Basin, a large wide stretch of the harbour in Hotwells.

Bristol Harbour. where the Quay walls and bollards have listed building status.The tidal new cut was constructed from Netham to Hotwells, with another dam installed at this end of the harbour. The Feeder Canal between Temple Meads and Netham provided a link to the tidal river so that boats could continue upstream to Bath. However, the new scheme required a way to equalise the levels inside and outside the Dock for the passage of vessels to and from the Avon, and bridges to cross the water. Jessop built Cumberland Basin with two entrance locks from the tidal Avon, of widths 45 and.

Bristol Harbour. 35 (ft), and a 45 (ft) junction lock between the Basin and what became known as the Floating Harbour. This arrangement provided flexibility of operation with the Basin being used as a lock when there were large numbers of arrivals and sailings. The harbour was officially opened on 1 May 1809. The first vessel built in the Floating Harbour was .Patterson's yard within the harbour was used for the construction of many ships notably Brunel's in 1838 and the in 1843. They were some of the largest ships to have been built at the time, and ironically hastened the decline.

Bristol Harbour. of the city docks by proving the feasibility of large ships. The SS "Great Britain" was to be towed away from her builders, to have her 1,000 hp engines and interior fitted out on the River Thames, but her 48 (ft) beam was too big to pass through the lock. Thus the SS "Great Britain" was moored in the Floating Harbour until December 1844, before proceeding into Cumberland Basin after coping stones and lock gate platforms were removed from the Junction Lock. At one time there were dozens of Bristol shipyards, the largest in the harbour being Hilhouse, who became.

Bristol Harbour. Charles Hill & Sons in 1845.## 19th century improvements.The harbour cost more than anticipated and high rates were levied to repay loans, reducing any benefit the new harbour had at drawing companies back from Liverpool. In 1848 the city council bought the docks company to force down the rates. They employed Isambard Kingdom Brunel to make improvements, including new lock gates, a dredger and sluice gates designed to reduce siltation.By 1867, ships were getting larger and the meanders in the river Avon prevented vessels over 300 (ft) from reaching the harbour. A scheme to install a much larger lock at.

Bristol Harbour. Avonmouth to make the entire river a floating harbour, and to straighten the sharper bends, was dropped after work began on the much cheaper docks at Avonmouth and Portishead. The present entrance lock was designed by Thomas Howard and opened in July 1873. This has a width of 62 (ft) and is the only entrance lock now in use at the City Docks.From 1893 until 1934 the Clifton Rocks Railway provided a funicular railway link, inside the cliff face, from the western end of the harbour, which is close to the locks, into Clifton.## Railways.The original Bristol Harbour Railway was.

Bristol Harbour. a joint venture by the GWR and the Bristol and Exeter Railway, opened in 1872 between Temple Meads and the Floating Harbour. Its route included a tunnel under St Mary Redcliffe church and a steam-powered bascule bridge over the entrance locks at Bathurst Basin. In 1876 the railway was extended by 1/2 (mi) to Wapping Wharf. In 1906, new branches from the south via the Ashton Avenue swing bridge were built to Canons Marsh on the north side of the Floating Harbour and to Wapping via a line alongside the New Cut. A Coal Concentration Depot owned by Western Fuels.

Bristol Harbour. was established at Wapping Wharf just behind the Industrial Museum but this closed in 1987.## Underfall Yard.The docks maintenance facility was established on the land exposed by the damming of the river to construct the harbour and remains sited at this location to the present day. William Jessop had created a weir in the dam at Underfall to allow surplus water to flow back into the New Cut, this was known as the 'Overfall'. By the 1830s, the Floating Harbour was suffering from severe silting. Isambard Kingdom Brunel was, however, able to devise a solution to this problem. In place.

Bristol Harbour. of the Overfall he advised better use of three shallow sluices and one deep scouring sluice between the harbour and the New Cut, together with a dredging vessel. This drag boat would scrape the silt away from the quay walls. When the deep sluice opened at low tide, a powerful undertow sucked the silt into the river to be carried away on the next tide. The shallow sluices enabled adjustment of the dock water level according to weather conditions.Several old buildings, which date from the 1880s, remain at Underfall Yard and have listed building status. The octagonal brick and terracotta.

Bristol Harbour. chimney of the hydraulic engine house dates from 1888, and is grade II* listed, as is the hydraulic engine house itself. It is built of red brick with a slate roof and contains pumping machinery, installed in 1907 by Fullerton, Hodgart and Barclay of Paisley, which powers the dock's hydraulic system of cranes, bridges and locks. The former pattern-maker's shop and stores date from the same period and are grade II listed, as are the Patent slip and quay walls.## Warehouses.A large number of warehouses were built around the harbour for storage and trade. Many survive today and some are.

Bristol Harbour. being converted into apartment blocks but many have been demolished as part of the regeneration of the area.One which has survived is the A Bond Tobacco Warehouse, which was built in 1905 and was the first of the three brick built bonded warehouses in the Cumberland Basin, and is a grade II listed building.B Bond Warehouse dates from 1908 and was the first in Britain to use Edmond Coignet's reinforced concrete system. It is now used by Bristol City Council and houses Bristol Archives, the CREATE Centre and council offices.Robinson's Warehouse built in 1874 by William Bruce Gingell, and the.

Bristol Harbour. Granary on Welsh Back are examples of the Bristol Byzantine style with coloured brick and Moorish arches.The Arnolfini art gallery occupies Bush House, a 19th-century Grade II* listed tea warehouse. and the Watershed Media Centre occupies another disused warehouse.## 20th century improvements.In 1908, the Royal Edward Dock was built in Avonmouth and in 1972 the large deep water Royal Portbury Dock was constructed on the opposite side of the mouth of the Avon, making the Bristol City Docks in the floating harbour redundant as a freight dock. In 1977 Charles Hill & Sons, the last shipbuilder at the Albion Yard,.

Bristol Harbour. closed after delivering the 1,541 tonne beer tanker "Miranda Guinness". Part of the yard reopened in 1980 when Abels Shipbuilders began operating. It produce a steady stream of small ferries, survey vessels, tugs and other craft before going out of business in 2006.Amey Roadstone (formerly T R Brown and Holms Sand & Gravel) sand dredgers worked from Poole's Wharf in Hotwells until 1991. Occasionally coastal trading vessels enter the Cumberland Basin to be loaded with large steel silos manufactured by Braby Ltd at their nearby Ashton Gate works.The old Junction Lock swing bridge is powered by water pressure from the.

Bristol Harbour. Underfall Yard hydraulic engine house at 750 (psi). The new Plimsoll Bridge, completed in 1965, has a more modern electro-hydraulic system using oil at a pressure of 4480 (psi).## Regeneration of the harbourside.Since the 1980s, millions of pounds have been spent regenerating the harbourside.In 1999, Pero's Bridge was constructed, linking the @Bristol exhibition with Bristol tourist attractions. In 2000, the @Bristol centre opened on semi-derelict land at Canon's Marsh and some of the existing Grade II listed buildings were refurbished and reused. It was funded with £44.3 million from the National Lottery, the Millennium Commission, South West of England Regional.

Bristol Harbour. Development Agency, and a further £43.4 million from Bristol City Council and commercial partners, including Nestlé. Private investors are also constructing studio apartment buildings.The regeneration of the Canon's Marsh area is expected to cost £240 million. Crest Nicholson were the lead developers, constructing 450 new flats, homes and waterside offices. It is being carried out under the guidance of The Harbourside Sponsors’ Group, which is a partnership between the City Council, key stakeholders, developers, businesses, operators and funders.The Cumberland Basin & Baltic Wharf are used by a variety of small boats by Baltic Wharf Sailing Club and is surrounded by.

Bristol Harbour. tourist attractions. The old hydraulic pumping station has been converted into a pub and is a Grade II listed building.There are two (since 2016) active boat building companies in the harbour: Bristol Classic Boat Company and the Slipway Co-operative at the Underfall Yard.## The harbour today.The harbour is now a tourist attraction with museums, galleries, exhibitions, bars and nightclubs. Former workshops and warehouses have now largely been converted or replaced by cultural venues, such as the Arnolfini art gallery, Watershed media and arts centre, M Shed museum, Antlers Gallery and the We The Curious science exhibition centre, as well as.

Bristol Harbour. a number of fashionable apartment buildings. The Bristol Harbour Railway, operated by M Shed, runs between the museum and the CREATE Centre on some weekends and bank holidays. Historic boats are permanently berthed in the harbour. These include Isambard Kingdom Brunel's , which was the first iron-hulled and propeller-driven ocean liner; and a replica of the "Matthew", in which John Cabot sailed to North America in 1497. The historic vessels of M Shed museum, which include the steam tug "Mayflower", firefloat "Pyronaut" and motor tug "John King", are periodically operated.Bristol Ferry Boats and Number Seven Boat Trips operate ferry services.

Bristol Harbour. along the harbour from near Temple Meads station to the Underfall Yard, serving landing stages in the city centre and close to most of the harbour-side attractions. A separate cross-harbour ferry carries pedestrians from the ferry landing at the "Great Britain" to the new harbour inlet opposite. Bristol Packet Boat Trips offer regular harbour tours with commentaries and river cruises on the "Tower Belle" up the River Avon to Conham, Hanham and Bath and downstream to Avonmouth.In late July each year, the Bristol Harbour Festival is held, resulting in an influx of boats, including tall ships, Royal Navy vessels and.

Bristol Harbour. lifeboats. There is a bylaw that prohibit swimming in the docks, with a fine of up to £1,000 for infringement.## Events.Bristol Harbour hosts the Bristol Harbour Festival in July of each year, attended by tall ships and hundreds of ships and boats of all kinds. About 200,000 visitors view the boats, and watch live music, street performances and other entertainments.In 1996, the harbour was the setting for the first International Festival of the Sea. A larger version of the annual harbour festivals, this was attended by many tall ships, including the "Eye of the Wind", "Pride of Baltimore", "Rose", "Kaskelot.

Bristol Harbour. and "Earl of Pembroke". The key theme was John Cabot's pioneering voyage of discovery to the Americas and a replica of Cabot's ship, the "Matthew", was dedicated prior to its reenactment of Cabot's voyage the following year. In 2009, the 200th anniversary of the Floating Harbour was commemorated with a series of celebratory events.In June 2020, the statue of Bristol slave trader Edward Colston was pushed into the harbour by protestors, after being pulled down from its plinth, jumped upon and daubed in paint. Port of Bristol Bristol Harbour Festival Bristol Marina Bristol City Council: Harbour events and attractions Bristol.

Bristol Harbour. City Council: Marine and waterway services Maps of Bristol Harbour c1900 – West, East Bristol Floating Harbour Primary sources from Bristol Museums and Libraries.


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

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

Green heron. The green heron (Butorides virescens) is a small heron of North and Central America. "Butorides" is from Middle English "butor" "bittern" and Ancient Greek "-oides", "resembling", and "virescens" is Latin for "greenish".It was long considered conspecific with its sister species the striated heron ("Butorides striata"), and together they were called "green-backed heron". Birds of the nominate subspecies (no matter which taxonomic arrangement is preferred) are extremely rare vagrants to western Europe—for example, a sighting in Pembrokeshire in 2018 was only the second recorded sighting in Wales; individuals from the Pacific coast of North America may similarly stray as far as.

Green heron. expected to undergo convergent evolution in unrelated populations of this species that just share the same habits. Thus, thorough molecular phylogenetic studies would be required to resolve the question of subspecies delimitation.The following subspecies are commonly listed, though the validity of most of them is seriously disputed: "Butorides virescens anthonyi" Breeds in the United States west of the Rocky Mountains, south to northern Baja California Peninsula, Mexico. Some resident, most migrate to western Mexico in winter. "Butorides virescens bahamensis" Bahamas. Resident. "Butorides virescens frazari" Southern Baja California Peninsula, Mexico. Resident. "Butorides virescens maculata" – formerly "maculatus"Southernmost US through Central America.

Green heron. to central Panama, Caribbean. Resident. "Butorides virescens virescens" Breeds from southeastern Canada to central and southern US east of the Rocky Mountains. Winters from southernmost US to northern South America.Much of the dispute hinges upon the distinctness of the Caribbean and Central American populations, the second taxon in this species to be described. To describe the two most extreme views, some authors assemble the bulk of the mainland population in the nominate subspecies but treat the parapatric populations as distinct subspecies, while others place all resident populations in "maculata" and all migratory ones in "virescens".## Ecology.The habitat of the green.

Green heron. grabs and eats the fish. When green herons catch large frogs, they drown them before swallowing them whole. "Butorides virescens" – Green heron at Animal Diversity Web Green heron – "Butorides virescens" – USGS Patuxent Bird Identification InfoCenter Green heron at eNature.com Field Guide on Flickr YouTube video of a green heron fishing YouTube Video of a Green Heron drowning a frog before eating it! Bermuda Dept. of Environment and Natural Resources green heron page ## External links.


Question: What is the parent organization of this aircraft?

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

De Havilland. The de Havilland Aircraft Company Limited () was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in Hertfordshire.Known for its innovation, de Havilland was responsible for a number of important aircraft, including the Moth biplane which revolutionised aviation in the 1920s; the 1930s Fox Moth, a commercial light passenger aircraft; the wooden World War II Mosquito multirole aircraft; and the pioneering passenger jet airliner Comet.The de Havilland company became a member of the Hawker Siddeley group in 1960, but.

De Havilland. lost its separate identity in 1963. Later, Hawker Siddeley merged into what is eventually known today as BAE Systems, the British aerospace and defence business. The de Havilland name lives on in De Havilland Canada, which owns the rights to the name and the aircraft produced by de Havilland's former Canadian subsidiary, including the Dash 8 regional airliner previously produced by Bombardier Aerospace.## History.## Origins.In January 1920 Geoffrey de Havilland was working for Airco as technical director and chief designer. BSA bought Airco on 20 January 1920 from George Holt Thomas on the say-so of one BSA director, Percy Martin,.

De Havilland. stronger. As a result, the Comet was extensively redesigned, with oval windows, structural reinforcements and other changes. Rival manufacturers meanwhile heeded the lessons learned from the Comet while developing their own aircraft. The Comet 4 enabled the de Havilland airliner to return to the skies in 1958. By then the United States had its Boeing 707 jet and the Douglas DC-8, both of which were faster and more economical to operate. Orders for the Comet dried up.Hawker Siddeley bought de Havilland in 1960 but kept it as a separate company until 1963. In that year it became the de Havilland.

De Havilland. Division of Hawker Siddeley Aviation and all types in production or development changed their designations from "DH" to "HS". De Havilland's final designs became the Hawker Siddeley Trident (originally the DH.121) and the innovative Hawker Siddley HS.125, originally the DH.125.The DH.121 design was modified to be smaller to fit the needs of one airline—British European Airways. Other airlines found it unattractive and turned to a rival tri-jet, the Boeing 727 which was much the same size as the initial DH.121 design. De Havilland, as Hawker Siddley, built only 117 Tridents, while Boeing went on to sell over 1,800 727s.De Havilland.

De Havilland. was established in March 1939, and work commenced on New Zealand's first aircraft factory at Rongotai. After World War II, the company undertook maintenance and refurbishment work until taken over by Hawker Siddeley International NZ Ltd in 1964. The site of the factory is now part of Wellington International Airport.## de Havilland Engines.As well as a prolific aircraft builder, de Havilland was also a significant producer of aero engines. This went against usual practice: usually engines are designed and produced by a dedicated company though in the UK the Bristol Aeroplane Company had a substantial engine business and Armstrong Whitworth.

De Havilland. Hertfordshire County Council for educational use: the site was then developed as Hatfield Technical College, which is now the College Lane Campus of the University of Hertfordshire. De Havilland was purchased by Hawker Siddeley in 1960 and merged into British Aerospace in 1978. The BAE site then closed in 1993, and the University of Hertfordshire purchased part of the site for the de Havilland Campus. Hatfield's aerospace history is recorded today in the names of local streets, such as Comet Way and Dragon Road.In September 2003 part of the former British aerospace site became the de Havilland campus of the.


Question: In which year was this building published?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Bedside. Bedside is a 1934 American pre-Code drama film starring Warren William, Jean Muir and Allen Jenkins. A man passes himself off as a doctor. Warren William as Bob Brown Jean Muir as Caroline Grant Allen Jenkins as Sam Sparks David Landau as Smith Katharine Sergava (Kathryn Sergava) as Mimi Maritza Henry O'Neill as Dr. William Chester Donald Meek as Dr. George Wiley Renee Whitney as Mme. Varsova Walter Walker as Dr. Michaels Marjorie Lytell as Patient with Sprained Ankle Frederick Burton as Hospital Superintendent Philip Faversham as Intern Attending Caroline (as Phillip Faversham) Louise Beavers as Pansy Earle Foxe as.


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

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

Mandarin duck. The mandarin duck ("Aix galericulata") is a perching duck species native to the East Palearctic. It is medium-sized, at 41 – 49 (cm) long with a 65 – 75 (cm) wingspan. It is closely related to the North American wood duck, the only other member of the genus "Aix". is an Ancient Greek word which was used by Aristotle to refer to an unknown diving bird, and is the Latin for a wig, derived from , a cap or bonnet. Outside of its native range, the mandarin duck has a large introduced population in the British Isles and Western Europe,.


Question: Where is this plant native to?

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

Eremalche rotundifolia. Eremalche rotundifolia, the desert five-spot, is a flowering plant in the family Malvaceae, native to the Mojave Desert and Colorado Desert in the Southwestern United States.Thisa dicot and annual herb is found in scrublands, desert flats, washes and open stony areas between 50 and 1,500 m in elevation. It can be found in Anza-Borrego Desert State Park and in Death Valley National Park in southern California. It can also be found in Nevada and Utah.Generally this wildflower is only found between March and May.## Description."Eremalche rotundifolia" is an annual plant growing to 8–60 cm tall, with rounded leaves 1.5–6 cm.

Eremalche rotundifolia. Flora Project: "Eremalche rotundifolia"USDA Plant Profile: "Eremalche rotundifolia"Mojave Desert Wildflowers, Jon Mark Stewart, 1998, pg. 132Calflora Database: "Eremalche rotundifolia" (Desert five spot)USDA Plants Profile for "Eremalche rotundifolia" (Desert fivespot).